diff --git a/.travis.yml b/.travis.yml
index bf5ccd9..719654c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,6 +32,10 @@
           packages:
           - clang-10
           - gnutls-bin
+      env:
+        # Platform tests have an allocation that returns null
+        - ASAN_OPTIONS="allocator_may_return_null=1"
+        - MSAN_OPTIONS="allocator_may_return_null=1"
       script:
         # Do a manual build+test sequence rather than using all.sh,
         # because there's no all.sh component that does what we want,
@@ -89,6 +93,10 @@
         apt:
           packages:
           - gcc
+      env:
+        # Platform tests have an allocation that returns null
+        - ASAN_OPTIONS="allocator_may_return_null=1"
+        - MSAN_OPTIONS="allocator_may_return_null=1"
       script:
         # Do a manual build+test sequence rather than using all.sh.
         #
@@ -115,6 +123,10 @@
           packages:
           - clang
           - gnutls-bin
+      env:
+        # Platform tests have an allocation that returns null
+        - ASAN_OPTIONS="allocator_may_return_null=1"
+        - MSAN_OPTIONS="allocator_may_return_null=1"
       script:
         # Do a manual build+test sequence rather than using all.sh.
         #
@@ -129,6 +141,30 @@
         - tests/scripts/travis-log-failure.sh
         - tests/context-info.sh
 
+    - name: Arm64 accelerators tests on arm64 host
+      os: linux
+      dist: focal
+      arch: arm64
+      addons:
+        apt:
+          packages:
+          - gcc
+      script:
+        # Do a manual build+test sequence rather than using all.sh.
+        #
+        # This is arm64 host only test for no runtime detection case. Internal
+        # and Open CI do not include Arm64 host, and they check if components
+        # are be tested. As result, it will always fail on `pre-test-check` in
+        # them.
+        - scripts/config.py unset MBEDTLS_AESNI_C
+        - scripts/config.py unset MBEDTLS_PADLOCK_C
+        - scripts/config.py set MBEDTLS_AESCE_C
+        - scripts/config.py set MBEDTLS_AES_USE_HARDWARE_ONLY
+        - make generated_files
+        - make
+        - programs/test/selftest aes | grep "using AESCE"
+        - tests/context-info.sh
+
 after_failure:
 - tests/scripts/travis-log-failure.sh
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9092c49..4d7e0b0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -226,7 +226,9 @@
 endif(CMAKE_COMPILER_IS_CLANG)
 
 if(CMAKE_COMPILER_IS_IAR)
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --warn_about_c_style_casts -Ohz")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --warn_about_c_style_casts")
+    set(CMAKE_C_FLAGS_RELEASE     "-Ohz")
+    set(CMAKE_C_FLAGS_DEBUG       "--debug -On")
 endif(CMAKE_COMPILER_IS_IAR)
 
 if(CMAKE_COMPILER_IS_MSVC)
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 3a8c5c6..8454fb8 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -84,8 +84,14 @@
 License and Copyright
 ---------------------
 
-All new files should include the [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) standard license header where possible. For licensing details, please see the [License section of the README](README.md#License).
+Unless specifically indicated otherwise in a file, Mbed TLS files are provided under the [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) license. See the [LICENSE](LICENSE) file for the full text of this license.
+
+Contributors must accept that their contributions are made under both the Apache-2.0 AND [GPL-2.0-or-later](https://spdx.org/licenses/GPL-2.0-or-later.html) licenses. This enables LTS (Long Term Support) branches of the software to be provided under either the Apache-2.0 or GPL-2.0-or-later licenses.
+
+All new files should include the [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) standard license header where possible.
 
 The copyright on contributions is retained by the original authors of the code. Where possible for new files, this should be noted in a comment at the top of the file in the form: "Copyright The Mbed TLS Contributors".
 
-When contributing code to us, the committer and all authors are required to make the submission under the terms of the [Developer Certificate of Origin](dco.txt), confirming that the code submitted can (legally) become part of the project, and be subject to the same Apache 2.0 license. This is done by including the standard Git `Signed-off-by:` line in every commit message. If more than one person contributed to the commit, they should also add their own `Signed-off-by:` line.
+When contributing code to us, the committer and all authors are required to make the submission under the terms of the [Developer Certificate of Origin](dco.txt), confirming that the code submitted can (legally) become part of the project, and is submitted under both the Apache-2.0 AND GPL-2.0-or-later licenses.
+
+This is done by including the standard Git `Signed-off-by:` line in every commit message. If more than one person contributed to the commit, they should also add their own `Signed-off-by:` line.
diff --git a/ChangeLog.d/add-aes-hardware-only-option.txt b/ChangeLog.d/add-aes-hardware-only-option.txt
new file mode 100644
index 0000000..a185aff
--- /dev/null
+++ b/ChangeLog.d/add-aes-hardware-only-option.txt
@@ -0,0 +1,6 @@
+Features
+   * New configuration option MBEDTLS_AES_USE_HARDWARE_ONLY introduced. When
+     using CPU-accelerated AES (e.g., Arm Crypto Extensions), this option
+     disables the plain C implementation and the run-time detection for the
+     CPU feature, which reduces code size and avoids the vulnerability of the
+     plain C implementation.
diff --git a/ChangeLog.d/fix-a-few-unchecked-return.txt b/ChangeLog.d/fix-a-few-unchecked-return.txt
new file mode 100644
index 0000000..aadde36
--- /dev/null
+++ b/ChangeLog.d/fix-a-few-unchecked-return.txt
@@ -0,0 +1,3 @@
+Bugfix
+   * Fix some cases where mbedtls_mpi_mod_exp, RSA key construction or ECDSA
+     signature can silently return an incorrect result in low memory conditions.
diff --git a/ChangeLog.d/fix-iar-compiler-warnings.txt b/ChangeLog.d/fix-iar-compiler-warnings.txt
new file mode 100644
index 0000000..0dc2623
--- /dev/null
+++ b/ChangeLog.d/fix-iar-compiler-warnings.txt
@@ -0,0 +1,2 @@
+Bugfix
+   * Fix IAR compiler warnings.
diff --git a/ChangeLog.d/psa_crypto_user_config_file.txt b/ChangeLog.d/psa_crypto_user_config_file.txt
new file mode 100644
index 0000000..f538f47
--- /dev/null
+++ b/ChangeLog.d/psa_crypto_user_config_file.txt
@@ -0,0 +1,3 @@
+Bugfix
+   * Don't try to include MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE when
+     MBEDTLS_PSA_CRYPTO_CONFIG is disabled.
diff --git a/README.md b/README.md
index cbdb2df3..a3fcd2e 100644
--- a/README.md
+++ b/README.md
@@ -307,13 +307,14 @@
 License
 -------
 
-Unless specifically indicated otherwise in a file, Mbed TLS files are provided under the [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) license. See the [LICENSE](LICENSE) file for the full text of this license. Contributors must accept that their contributions are made under both the Apache-2.0 AND [GPL-2.0-or-later](https://spdx.org/licenses/GPL-2.0-or-later.html) licenses. This enables LTS (Long Term Support) branches of the software to be provided under either the Apache-2.0 OR GPL-2.0-or-later licenses.
+Unless specifically indicated otherwise in a file, Mbed TLS files are provided under the [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) license. See the [LICENSE](LICENSE) file for the full text of this license, and [the 'License and Copyright' section in the contributing guidelines](CONTRIBUTING.md#License-and-Copyright) for more information.
 
 ### Third-party code included in Mbed TLS
+
 This project contains code from other projects. This code is located within the `3rdparty/` directory. The original license text is included within project subdirectories, and in source files. The projects are listed below:
 
 * `3rdparty/everest/`: Files stem from [Project Everest](https://project-everest.github.io/) and are distributed under the Apache 2.0 license.
-* `3rdparty/p256-m/p256-m/`: Files have been taken from the [p256-m](https://github.com/mpg/p256-m) repository. The code in the original repository is distributed under the Apache 2.0 license. It is also used by the project under the Apache 2.0 license. We do not plan to regularly update these files, so they may not contain fixes and improvements present in the upstream project.
+* `3rdparty/p256-m/p256-m/`: Files have been taken from the [p256-m](https://github.com/mpg/p256-m) repository. The code in the original repository is distributed under the Apache 2.0 license. It is also used by Mbed TLS under the Apache 2.0 license. We do not plan to regularly update these files, so they may not contain fixes and improvements present in the upstream project.
 
 Contributing
 ------------
diff --git a/doxygen/mbedtls.doxyfile b/doxygen/mbedtls.doxyfile
index 8c7c7cc..7fd5dde 100644
--- a/doxygen/mbedtls.doxyfile
+++ b/doxygen/mbedtls.doxyfile
@@ -51,4 +51,5 @@
                          "MBEDTLS_CHECK_RETURN_TYPICAL="    \
                          "MBEDTLS_CHECK_RETURN_OPTIONAL="   \
                          "MBEDTLS_PRINTF_ATTRIBUTE(a,b)="   \
+                         "__DOXYGEN__"                      \
 
diff --git a/include/mbedtls/build_info.h b/include/mbedtls/build_info.h
index 985edd2..c0424da 100644
--- a/include/mbedtls/build_info.h
+++ b/include/mbedtls/build_info.h
@@ -59,6 +59,7 @@
 #define inline __inline
 #endif
 
+/* X.509, TLS and non-PSA crypto configuration */
 #if !defined(MBEDTLS_CONFIG_FILE)
 #include "mbedtls/mbedtls_config.h"
 #else
@@ -80,6 +81,18 @@
 #include MBEDTLS_USER_CONFIG_FILE
 #endif
 
+/* PSA crypto configuration */
+#if defined(MBEDTLS_PSA_CRYPTO_CONFIG)
+#if defined(MBEDTLS_PSA_CRYPTO_CONFIG_FILE)
+#include MBEDTLS_PSA_CRYPTO_CONFIG_FILE
+#else
+#include "psa/crypto_config.h"
+#endif
+#if defined(MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE)
+#include MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE
+#endif
+#endif /* defined(MBEDTLS_PSA_CRYPTO_CONFIG) */
+
 /* Auto-enable MBEDTLS_CTR_DRBG_USE_128_BIT_KEY if
  * MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH and MBEDTLS_CTR_DRBG_C defined
  * to ensure a 128-bit key size in CTR_DRBG.
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 3d6353e..ca267bd 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -412,10 +412,6 @@
 #error "MBEDTLS_MEMORY_DEBUG defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_PADLOCK_C) && !defined(MBEDTLS_HAVE_ASM)
-#error "MBEDTLS_PADLOCK_C defined, but not all prerequisites"
-#endif
-
 #if defined(MBEDTLS_PEM_PARSE_C) && !defined(MBEDTLS_BASE64_C)
 #error "MBEDTLS_PEM_PARSE_C defined, but not all prerequisites"
 #endif
diff --git a/include/mbedtls/config_psa.h b/include/mbedtls/config_psa.h
index 303758f..3b30c02 100644
--- a/include/mbedtls/config_psa.h
+++ b/include/mbedtls/config_psa.h
@@ -30,24 +30,8 @@
 #ifndef MBEDTLS_CONFIG_PSA_H
 #define MBEDTLS_CONFIG_PSA_H
 
-#if defined(MBEDTLS_PSA_CRYPTO_CONFIG)
-#if defined(MBEDTLS_PSA_CRYPTO_CONFIG_FILE)
-#include MBEDTLS_PSA_CRYPTO_CONFIG_FILE
-#else
-#include "psa/crypto_config.h"
-#endif
-#endif /* defined(MBEDTLS_PSA_CRYPTO_CONFIG) */
-
-#if defined(MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE)
-#include MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE
-#endif
-
 #include "psa/crypto_legacy.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 
 
 /****************************************************************/
@@ -1074,8 +1058,4 @@
 #define PSA_WANT_KEY_TYPE_PASSWORD_HASH 1
 #define PSA_WANT_KEY_TYPE_RAW_DATA 1
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* MBEDTLS_CONFIG_PSA_H */
diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 6a76e88..2a24a45 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -172,15 +172,47 @@
  * This allows different allocators (self-implemented or provided) to be
  * provided to the platform abstraction layer.
  *
- * Enabling MBEDTLS_PLATFORM_MEMORY without the
+ * Enabling #MBEDTLS_PLATFORM_MEMORY without the
  * MBEDTLS_PLATFORM_{FREE,CALLOC}_MACROs will provide
  * "mbedtls_platform_set_calloc_free()" allowing you to set an alternative calloc() and
  * free() function pointer at runtime.
  *
- * Enabling MBEDTLS_PLATFORM_MEMORY and specifying
+ * Enabling #MBEDTLS_PLATFORM_MEMORY and specifying
  * MBEDTLS_PLATFORM_{CALLOC,FREE}_MACROs will allow you to specify the
  * alternate function at compile time.
  *
+ * An overview of how the value of mbedtls_calloc is determined:
+ *
+ * - if !MBEDTLS_PLATFORM_MEMORY
+ *     - mbedtls_calloc = calloc
+ * - if MBEDTLS_PLATFORM_MEMORY
+ *     - if (MBEDTLS_PLATFORM_CALLOC_MACRO && MBEDTLS_PLATFORM_FREE_MACRO):
+ *         - mbedtls_calloc = MBEDTLS_PLATFORM_CALLOC_MACRO
+ *     - if !(MBEDTLS_PLATFORM_CALLOC_MACRO && MBEDTLS_PLATFORM_FREE_MACRO):
+ *         - Dynamic setup via mbedtls_platform_set_calloc_free is now possible with a default value MBEDTLS_PLATFORM_STD_CALLOC.
+ *         - How is MBEDTLS_PLATFORM_STD_CALLOC handled?
+ *         - if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS:
+ *             - MBEDTLS_PLATFORM_STD_CALLOC is not set to anything;
+ *             - MBEDTLS_PLATFORM_STD_MEM_HDR can be included if present;
+ *         - if !MBEDTLS_PLATFORM_NO_STD_FUNCTIONS:
+ *             - if MBEDTLS_PLATFORM_STD_CALLOC is present:
+ *                 - User-defined MBEDTLS_PLATFORM_STD_CALLOC is respected;
+ *             - if !MBEDTLS_PLATFORM_STD_CALLOC:
+ *                 - MBEDTLS_PLATFORM_STD_CALLOC = calloc
+ *
+ *         - At this point the presence of MBEDTLS_PLATFORM_STD_CALLOC is checked.
+ *         - if !MBEDTLS_PLATFORM_STD_CALLOC
+ *             - MBEDTLS_PLATFORM_STD_CALLOC = uninitialized_calloc
+ *
+ *         - mbedtls_calloc = MBEDTLS_PLATFORM_STD_CALLOC.
+ *
+ * Defining MBEDTLS_PLATFORM_CALLOC_MACRO and #MBEDTLS_PLATFORM_STD_CALLOC at the same time is not possible.
+ * MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO must both be defined or undefined at the same time.
+ * #MBEDTLS_PLATFORM_STD_CALLOC and #MBEDTLS_PLATFORM_STD_FREE do not have to be defined at the same time, as, if they are used,
+ * dynamic setup of these functions is possible. See the tree above to see how are they handled in all cases.
+ * An uninitialized #MBEDTLS_PLATFORM_STD_CALLOC always fails, returning a null pointer.
+ * An uninitialized #MBEDTLS_PLATFORM_STD_FREE does not do anything.
+ *
  * Requires: MBEDTLS_PLATFORM_C
  *
  * Enable this layer to allow use of alternative memory allocators.
@@ -3708,8 +3740,29 @@
 
 /* Platform options */
 //#define MBEDTLS_PLATFORM_STD_MEM_HDR   <stdlib.h> /**< Header to include if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS is defined. Don't define if no header is needed. */
-//#define MBEDTLS_PLATFORM_STD_CALLOC        calloc /**< Default allocator to use, can be undefined */
-//#define MBEDTLS_PLATFORM_STD_FREE            free /**< Default free to use, can be undefined */
+
+/** \def MBEDTLS_PLATFORM_STD_CALLOC
+ *
+ * Default allocator to use, can be undefined.
+ * It must initialize the allocated buffer memory to zeroes.
+ * The size of the buffer is the product of the two parameters.
+ * The calloc function returns either a null pointer or a pointer to the allocated space.
+ * If the product is 0, the function may either return NULL or a valid pointer to an array of size 0 which is a valid input to the deallocation function.
+ * An uninitialized #MBEDTLS_PLATFORM_STD_CALLOC always fails, returning a null pointer.
+ * See the description of #MBEDTLS_PLATFORM_MEMORY for more details.
+ * The corresponding deallocation function is #MBEDTLS_PLATFORM_STD_FREE.
+ */
+//#define MBEDTLS_PLATFORM_STD_CALLOC        calloc
+
+/** \def MBEDTLS_PLATFORM_STD_FREE
+ *
+ * Default free to use, can be undefined.
+ * NULL is a valid parameter, and the function must do nothing.
+ * A non-null parameter will always be a pointer previously returned by #MBEDTLS_PLATFORM_STD_CALLOC and not yet freed.
+ * An uninitialized #MBEDTLS_PLATFORM_STD_FREE does not do anything.
+ * See the description of #MBEDTLS_PLATFORM_MEMORY for more details (same principles as for MBEDTLS_PLATFORM_STD_CALLOC apply).
+ */
+//#define MBEDTLS_PLATFORM_STD_FREE            free
 //#define MBEDTLS_PLATFORM_STD_SETBUF      setbuf /**< Default setbuf to use, can be undefined */
 //#define MBEDTLS_PLATFORM_STD_EXIT            exit /**< Default exit to use, can be undefined */
 //#define MBEDTLS_PLATFORM_STD_TIME            time /**< Default time to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
@@ -3723,10 +3776,10 @@
 //#define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE  mbedtls_platform_std_nv_seed_write /**< Default nv_seed_write function to use, can be undefined */
 //#define MBEDTLS_PLATFORM_STD_NV_SEED_FILE  "seedfile" /**< Seed file to read/write with default implementation */
 
-/* To Use Function Macros MBEDTLS_PLATFORM_C must be enabled */
+/* To use the following function macros, MBEDTLS_PLATFORM_C must be enabled. */
 /* MBEDTLS_PLATFORM_XXX_MACRO and MBEDTLS_PLATFORM_XXX_ALT cannot both be defined */
-//#define MBEDTLS_PLATFORM_CALLOC_MACRO        calloc /**< Default allocator macro to use, can be undefined */
-//#define MBEDTLS_PLATFORM_FREE_MACRO            free /**< Default free macro to use, can be undefined */
+//#define MBEDTLS_PLATFORM_CALLOC_MACRO        calloc /**< Default allocator macro to use, can be undefined. See MBEDTLS_PLATFORM_STD_CALLOC for requirements. */
+//#define MBEDTLS_PLATFORM_FREE_MACRO            free /**< Default free macro to use, can be undefined. See MBEDTLS_PLATFORM_STD_FREE for requirements. */
 //#define MBEDTLS_PLATFORM_EXIT_MACRO            exit /**< Default exit macro to use, can be undefined */
 //#define MBEDTLS_PLATFORM_SETBUF_MACRO      setbuf /**< Default setbuf macro to use, can be undefined */
 //#define MBEDTLS_PLATFORM_TIME_MACRO            time /**< Default time macro to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
@@ -4016,4 +4069,18 @@
  */
 //#define MBEDTLS_ECP_WITH_MPI_UINT
 
+/*
+ * Disable plain C implementation for AES.
+ *
+ * When the plain C implementation is enabled, and an implementation using a
+ * special CPU feature (such as MBEDTLS_AESCE_C) is also enabled, runtime
+ * detection will be used to select between them.
+ *
+ * If only one implementation is present, runtime detection will not be used.
+ * This configuration will crash at runtime if running on a CPU without the
+ * necessary features. It will not build unless at least one of MBEDTLS_AESCE_C
+ * and/or MBEDTLS_AESNI_C is enabled & present in the build.
+ */
+//#define MBEDTLS_AES_USE_HARDWARE_ONLY
+
 /** \} name SECTION: Module configuration options */
diff --git a/include/mbedtls/net_sockets.h b/include/mbedtls/net_sockets.h
index 14316fb..1096d66 100644
--- a/include/mbedtls/net_sockets.h
+++ b/include/mbedtls/net_sockets.h
@@ -286,6 +286,10 @@
  * \brief          Closes down the connection and free associated data
  *
  * \param ctx      The context to close
+ *
+ * \note           This function frees and clears data associated with the
+ *                 context but does not free the memory pointed to by \p ctx.
+ *                 This memory is the responsibility of the caller.
  */
 void mbedtls_net_close(mbedtls_net_context *ctx);
 
@@ -293,6 +297,10 @@
  * \brief          Gracefully shutdown the connection and free associated data
  *
  * \param ctx      The context to free
+ *
+ * \note           This function frees and clears data associated with the
+ *                 context but does not free the memory pointed to by \p ctx.
+ *                 This memory is the responsibility of the caller.
  */
 void mbedtls_net_free(mbedtls_net_context *ctx);
 
diff --git a/include/mbedtls/platform.h b/include/mbedtls/platform.h
index 768c756..3fc1fd0 100644
--- a/include/mbedtls/platform.h
+++ b/include/mbedtls/platform.h
@@ -130,11 +130,22 @@
 #endif
 #endif /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */
 
+/* Enable certain documented defines only when generating doxygen to avoid
+ * an "unrecognized define" error. */
+#if defined(__DOXYGEN__) && !defined(MBEDTLS_PLATFORM_STD_CALLOC)
+#define MBEDTLS_PLATFORM_STD_CALLOC
+#endif
+
+#if defined(__DOXYGEN__) && !defined(MBEDTLS_PLATFORM_STD_FREE)
+#define MBEDTLS_PLATFORM_STD_FREE
+#endif
 
 /** \} name SECTION: Module settings */
 
 /*
  * The function pointers for calloc and free.
+ * Please see MBEDTLS_PLATFORM_STD_CALLOC and MBEDTLS_PLATFORM_STD_FREE
+ * in mbedtls_config.h for more information about behaviour and requirements.
  */
 #if defined(MBEDTLS_PLATFORM_MEMORY)
 #if defined(MBEDTLS_PLATFORM_FREE_MACRO) && \
diff --git a/include/psa/crypto_config.h b/include/psa/crypto_config.h
index af78dce..d8e8e19 100644
--- a/include/psa/crypto_config.h
+++ b/include/psa/crypto_config.h
@@ -92,7 +92,8 @@
 #define PSA_WANT_ALG_TLS12_PSK_TO_MS            1
 #define PSA_WANT_ALG_TLS12_ECJPAKE_TO_PMS       1
 
-/* Note: when adding support, also adjust include/mbedtls/config_psa.h */
+/* XTS is not yet supported via the PSA API in Mbed TLS.
+ * Note: when adding support, also adjust include/mbedtls/config_psa.h */
 //#define PSA_WANT_ALG_XTS                        1
 
 #define PSA_WANT_ECC_BRAINPOOL_P_R1_256         1
diff --git a/library/aes.c b/library/aes.c
index b55c08a..47a5e3e 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -33,6 +33,36 @@
 #include "mbedtls/platform.h"
 #include "mbedtls/platform_util.h"
 #include "mbedtls/error.h"
+
+#if defined(__aarch64__)
+#if !defined(MBEDTLS_AESCE_C) && defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
+#error "MBEDTLS_AES_USE_HARDWARE_ONLY defined, but not all prerequisites"
+#endif
+#endif
+
+#if defined(__amd64__) || defined(__x86_64__) || \
+    ((defined(_M_X64) || defined(_M_AMD64)) && !defined(_M_ARM64EC))
+#if !defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
+#error "MBEDTLS_AES_USE_HARDWARE_ONLY defined, but not all prerequisites"
+#endif
+#endif
+
+#if defined(__i386__) || defined(_M_IX86)
+#if defined(MBEDTLS_AES_USE_HARDWARE_ONLY) && !defined(MBEDTLS_AESNI_C)
+#error "MBEDTLS_AES_USE_HARDWARE_ONLY defined, but not all prerequisites"
+#endif
+
+#if defined(MBEDTLS_PADLOCK_C)
+#if !defined(MBEDTLS_HAVE_ASM)
+#error "MBEDTLS_PADLOCK_C defined, but not all prerequisites"
+#endif
+#if defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
+#error "MBEDTLS_AES_USE_HARDWARE_ONLY cannot be defined when " \
+    "MBEDTLS_PADLOCK_C is set"
+#endif
+#endif
+#endif
+
 #if defined(MBEDTLS_PADLOCK_C)
 #include "padlock.h"
 #endif
@@ -47,7 +77,7 @@
 
 #if !defined(MBEDTLS_AES_ALT)
 
-#if defined(MBEDTLS_PADLOCK_C) && defined(MBEDTLS_HAVE_X86)
+#if defined(MBEDTLS_VIA_PADLOCK_HAVE_CODE)
 static int aes_padlock_ace = -1;
 #endif
 
@@ -542,7 +572,7 @@
  * Note that the offset is in units of elements of buf, i.e. 32-bit words,
  * i.e. an offset of 1 means 4 bytes and so on.
  */
-#if (defined(MBEDTLS_PADLOCK_C) && defined(MBEDTLS_HAVE_X86)) ||        \
+#if (defined(MBEDTLS_VIA_PADLOCK_HAVE_CODE)) ||        \
     (defined(MBEDTLS_AESNI_C) && MBEDTLS_AESNI_HAVE_CODE == 2)
 #define MAY_NEED_TO_ALIGN
 #endif
@@ -554,7 +584,7 @@
 #if defined(MAY_NEED_TO_ALIGN)
     int align_16_bytes = 0;
 
-#if defined(MBEDTLS_PADLOCK_C) && defined(MBEDTLS_HAVE_X86)
+#if defined(MBEDTLS_VIA_PADLOCK_HAVE_CODE)
     if (aes_padlock_ace == -1) {
         aes_padlock_ace = mbedtls_padlock_has_support(MBEDTLS_PADLOCK_ACE);
     }
@@ -595,7 +625,6 @@
 int mbedtls_aes_setkey_enc(mbedtls_aes_context *ctx, const unsigned char *key,
                            unsigned int keybits)
 {
-    unsigned int i;
     uint32_t *RK;
 
     switch (keybits) {
@@ -624,19 +653,20 @@
 #endif
 
 #if defined(MBEDTLS_AESCE_C) && defined(MBEDTLS_HAVE_ARM64)
-    if (mbedtls_aesce_has_support()) {
+    if (MBEDTLS_AESCE_HAS_SUPPORT()) {
         return mbedtls_aesce_setkey_enc((unsigned char *) RK, key, keybits);
     }
 #endif
 
-    for (i = 0; i < (keybits >> 5); i++) {
+#if !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
+    for (unsigned int i = 0; i < (keybits >> 5); i++) {
         RK[i] = MBEDTLS_GET_UINT32_LE(key, i << 2);
     }
 
     switch (ctx->nr) {
         case 10:
 
-            for (i = 0; i < 10; i++, RK += 4) {
+            for (unsigned int i = 0; i < 10; i++, RK += 4) {
                 RK[4]  = RK[0] ^ RCON[i] ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_1(RK[3])]) ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_2(RK[3])] <<  8) ^
@@ -652,7 +682,7 @@
 #if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
         case 12:
 
-            for (i = 0; i < 8; i++, RK += 6) {
+            for (unsigned int i = 0; i < 8; i++, RK += 6) {
                 RK[6]  = RK[0] ^ RCON[i] ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_1(RK[5])]) ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_2(RK[5])] <<  8) ^
@@ -669,7 +699,7 @@
 
         case 14:
 
-            for (i = 0; i < 7; i++, RK += 8) {
+            for (unsigned int i = 0; i < 7; i++, RK += 8) {
                 RK[8]  = RK[0] ^ RCON[i] ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_1(RK[7])]) ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_2(RK[7])] <<  8) ^
@@ -695,6 +725,7 @@
     }
 
     return 0;
+#endif /* !MBEDTLS_AES_USE_HARDWARE_ONLY */
 }
 #endif /* !MBEDTLS_AES_SETKEY_ENC_ALT */
 
@@ -705,10 +736,13 @@
 int mbedtls_aes_setkey_dec(mbedtls_aes_context *ctx, const unsigned char *key,
                            unsigned int keybits)
 {
-    int i, j, ret;
+#if !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
+    uint32_t *SK;
+#endif
+    int ret;
     mbedtls_aes_context cty;
     uint32_t *RK;
-    uint32_t *SK;
+
 
     mbedtls_aes_init(&cty);
 
@@ -731,7 +765,7 @@
 #endif
 
 #if defined(MBEDTLS_AESCE_C) && defined(MBEDTLS_HAVE_ARM64)
-    if (mbedtls_aesce_has_support()) {
+    if (MBEDTLS_AESCE_HAS_SUPPORT()) {
         mbedtls_aesce_inverse_key(
             (unsigned char *) RK,
             (const unsigned char *) (cty.buf + cty.rk_offset),
@@ -740,15 +774,16 @@
     }
 #endif
 
+#if !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
     SK = cty.buf + cty.rk_offset + cty.nr * 4;
 
     *RK++ = *SK++;
     *RK++ = *SK++;
     *RK++ = *SK++;
     *RK++ = *SK++;
-
-    for (i = ctx->nr - 1, SK -= 8; i > 0; i--, SK -= 8) {
-        for (j = 0; j < 4; j++, SK++) {
+    SK -= 8;
+    for (int i = ctx->nr - 1; i > 0; i--, SK -= 8) {
+        for (int j = 0; j < 4; j++, SK++) {
             *RK++ = AES_RT0(FSb[MBEDTLS_BYTE_0(*SK)]) ^
                     AES_RT1(FSb[MBEDTLS_BYTE_1(*SK)]) ^
                     AES_RT2(FSb[MBEDTLS_BYTE_2(*SK)]) ^
@@ -760,7 +795,7 @@
     *RK++ = *SK++;
     *RK++ = *SK++;
     *RK++ = *SK++;
-
+#endif /* !MBEDTLS_AES_USE_HARDWARE_ONLY */
 exit:
     mbedtls_aes_free(&cty);
 
@@ -1057,22 +1092,25 @@
 #endif
 
 #if defined(MBEDTLS_AESCE_C) && defined(MBEDTLS_HAVE_ARM64)
-    if (mbedtls_aesce_has_support()) {
+    if (MBEDTLS_AESCE_HAS_SUPPORT()) {
         return mbedtls_aesce_crypt_ecb(ctx, mode, input, output);
     }
 #endif
 
-#if defined(MBEDTLS_PADLOCK_C) && defined(MBEDTLS_HAVE_X86)
+#if defined(MBEDTLS_VIA_PADLOCK_HAVE_CODE)
     if (aes_padlock_ace > 0) {
         return mbedtls_padlock_xcryptecb(ctx, mode, input, output);
     }
 #endif
 
+#if !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
     if (mode == MBEDTLS_AES_ENCRYPT) {
         return mbedtls_internal_aes_encrypt(ctx, input, output);
     } else {
         return mbedtls_internal_aes_decrypt(ctx, input, output);
     }
+#endif
+
 }
 
 #if defined(MBEDTLS_CIPHER_MODE_CBC)
@@ -1103,7 +1141,7 @@
         return MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH;
     }
 
-#if defined(MBEDTLS_PADLOCK_C) && defined(MBEDTLS_HAVE_X86)
+#if defined(MBEDTLS_VIA_PADLOCK_HAVE_CODE)
     if (aes_padlock_ace > 0) {
         if (mbedtls_padlock_xcryptcbc(ctx, mode, length, iv, input, output) == 0) {
             return 0;
@@ -1855,29 +1893,33 @@
 #if defined(MBEDTLS_AES_ALT)
         mbedtls_printf("  AES note: alternative implementation.\n");
 #else /* MBEDTLS_AES_ALT */
-#if defined(MBEDTLS_PADLOCK_C) && defined(MBEDTLS_HAVE_X86)
-        if (mbedtls_padlock_has_support(MBEDTLS_PADLOCK_ACE)) {
-            mbedtls_printf("  AES note: using VIA Padlock.\n");
-        } else
-#endif
 #if defined(MBEDTLS_AESNI_HAVE_CODE)
 #if MBEDTLS_AESNI_HAVE_CODE == 1
         mbedtls_printf("  AES note: AESNI code present (assembly implementation).\n");
 #elif MBEDTLS_AESNI_HAVE_CODE == 2
         mbedtls_printf("  AES note: AESNI code present (intrinsics implementation).\n");
 #else
-#error Unrecognised value for MBEDTLS_AESNI_HAVE_CODE
+#error "Unrecognised value for MBEDTLS_AESNI_HAVE_CODE"
 #endif
         if (mbedtls_aesni_has_support(MBEDTLS_AESNI_AES)) {
             mbedtls_printf("  AES note: using AESNI.\n");
         } else
 #endif
+#if defined(MBEDTLS_VIA_PADLOCK_HAVE_CODE)
+        if (mbedtls_padlock_has_support(MBEDTLS_PADLOCK_ACE)) {
+            mbedtls_printf("  AES note: using VIA Padlock.\n");
+        } else
+#endif
 #if defined(MBEDTLS_AESCE_C) && defined(MBEDTLS_HAVE_ARM64)
-        if (mbedtls_aesce_has_support()) {
+        if (MBEDTLS_AESCE_HAS_SUPPORT()) {
             mbedtls_printf("  AES note: using AESCE.\n");
         } else
 #endif
-        mbedtls_printf("  AES note: built-in implementation.\n");
+        {
+#if !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
+            mbedtls_printf("  AES note: built-in implementation.\n");
+#endif
+        }
 #endif /* MBEDTLS_AES_ALT */
     }
 
diff --git a/library/aesce.c b/library/aesce.c
index ed3cca1..6f75a67 100644
--- a/library/aesce.c
+++ b/library/aesce.c
@@ -94,25 +94,39 @@
 #endif /* !(__ARM_FEATURE_CRYPTO || __ARM_FEATURE_AES) ||
           MBEDTLS_ENABLE_ARM_CRYPTO_EXTENSIONS_COMPILER_FLAG */
 
-#if defined(__linux__)
+#if defined(__linux__) && !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
+
 #include <asm/hwcap.h>
 #include <sys/auxv.h>
-#endif
 
+signed char mbedtls_aesce_has_support_result = -1;
+
+#if !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
 /*
  * AES instruction support detection routine
  */
-int mbedtls_aesce_has_support(void)
+int mbedtls_aesce_has_support_impl(void)
 {
-#if defined(__linux__)
-    unsigned long auxval = getauxval(AT_HWCAP);
-    return (auxval & (HWCAP_ASIMD | HWCAP_AES)) ==
-           (HWCAP_ASIMD | HWCAP_AES);
-#else
-    /* Assume AES instructions are supported. */
-    return 1;
-#endif
+    /* To avoid many calls to getauxval, cache the result. This is
+     * thread-safe, because we store the result in a char so cannot
+     * be vulnerable to non-atomic updates.
+     * It is possible that we could end up setting result more than
+     * once, but that is harmless.
+     */
+    if (mbedtls_aesce_has_support_result == -1) {
+        unsigned long auxval = getauxval(AT_HWCAP);
+        if ((auxval & (HWCAP_ASIMD | HWCAP_AES)) ==
+            (HWCAP_ASIMD | HWCAP_AES)) {
+            mbedtls_aesce_has_support_result = 1;
+        } else {
+            mbedtls_aesce_has_support_result = 0;
+        }
+    }
+    return mbedtls_aesce_has_support_result;
 }
+#endif
+
+#endif /* defined(__linux__) && !defined(MBEDTLS_AES_USE_HARDWARE_ONLY) */
 
 /* Single round of AESCE encryption */
 #define AESCE_ENCRYPT_ROUND                   \
diff --git a/library/aesce.h b/library/aesce.h
index b12bf76..735c8cf 100644
--- a/library/aesce.h
+++ b/library/aesce.h
@@ -42,12 +42,29 @@
 extern "C" {
 #endif
 
+#if defined(__linux__) && !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
+
+extern signed char mbedtls_aesce_has_support_result;
+
 /**
  * \brief          Internal function to detect the crypto extension in CPUs.
  *
  * \return         1 if CPU has support for the feature, 0 otherwise
  */
-int mbedtls_aesce_has_support(void);
+int mbedtls_aesce_has_support_impl(void);
+
+#define MBEDTLS_AESCE_HAS_SUPPORT() (mbedtls_aesce_has_support_result == -1 ? \
+                                     mbedtls_aesce_has_support_impl() : \
+                                     mbedtls_aesce_has_support_result)
+
+#else /* defined(__linux__) && !defined(MBEDTLS_AES_USE_HARDWARE_ONLY) */
+
+/* If we are not on Linux, we can't detect support so assume that it's supported.
+ * Similarly, assume support if MBEDTLS_AES_USE_HARDWARE_ONLY is set.
+ */
+#define MBEDTLS_AESCE_HAS_SUPPORT() 1
+
+#endif /* defined(__linux__) && !defined(MBEDTLS_AES_USE_HARDWARE_ONLY) */
 
 /**
  * \brief          Internal AES-ECB block encryption and decryption
diff --git a/library/aesni.c b/library/aesni.c
index 3e3dccb..5f25a82 100644
--- a/library/aesni.c
+++ b/library/aesni.c
@@ -41,6 +41,7 @@
 #include <immintrin.h>
 #endif
 
+#if !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
 /*
  * AES-NI support detection routine
  */
@@ -70,6 +71,7 @@
 
     return (c & what) != 0;
 }
+#endif /* !MBEDTLS_AES_USE_HARDWARE_ONLY */
 
 #if MBEDTLS_AESNI_HAVE_CODE == 2
 
diff --git a/library/aesni.h b/library/aesni.h
index 82947e4..332a0f0 100644
--- a/library/aesni.h
+++ b/library/aesni.h
@@ -35,13 +35,20 @@
 /* Can we do AESNI with inline assembly?
  * (Only implemented with gas syntax, only for 64-bit.)
  */
-#if defined(MBEDTLS_HAVE_ASM) && defined(__GNUC__) && \
-    (defined(__amd64__) || defined(__x86_64__))   &&  \
-    !defined(MBEDTLS_HAVE_X86_64)
+#if !defined(MBEDTLS_HAVE_X86_64) && \
+    (defined(__amd64__) || defined(__x86_64__) || \
+    defined(_M_X64) || defined(_M_AMD64)) && \
+    !defined(_M_ARM64EC)
 #define MBEDTLS_HAVE_X86_64
 #endif
 
-#if defined(MBEDTLS_AESNI_C)
+#if !defined(MBEDTLS_HAVE_X86) && \
+    (defined(__i386__) || defined(_M_IX86))
+#define MBEDTLS_HAVE_X86
+#endif
+
+#if defined(MBEDTLS_AESNI_C) && \
+    (defined(MBEDTLS_HAVE_X86_64) || defined(MBEDTLS_HAVE_X86))
 
 /* Can we do AESNI with intrinsics?
  * (Only implemented with certain compilers, only for certain targets.)
@@ -67,8 +74,13 @@
  * In the long run, we will likely remove the assembly implementation. */
 #if defined(MBEDTLS_AESNI_HAVE_INTRINSICS)
 #define MBEDTLS_AESNI_HAVE_CODE 2 // via intrinsics
-#elif defined(MBEDTLS_HAVE_X86_64)
+#elif defined(MBEDTLS_HAVE_ASM) && \
+    defined(__GNUC__) && defined(MBEDTLS_HAVE_X86_64)
 #define MBEDTLS_AESNI_HAVE_CODE 1 // via assembly
+#elif defined(__GNUC__)
+#   error "Must use `-mpclmul -msse2 -maes` for MBEDTLS_AESNI_C"
+#else
+#error "MBEDTLS_AESNI_C defined, but neither intrinsics nor assembly available"
 #endif
 
 #if defined(MBEDTLS_AESNI_HAVE_CODE)
@@ -88,7 +100,11 @@
  *
  * \return         1 if CPU has support for the feature, 0 otherwise
  */
+#if !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
 int mbedtls_aesni_has_support(unsigned int what);
+#else
+#define mbedtls_aesni_has_support(what) 1
+#endif
 
 /**
  * \brief          Internal AES-NI AES-ECB block encryption and decryption
diff --git a/library/bignum.c b/library/bignum.c
index b1518ed..0a0022c 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -1826,8 +1826,9 @@
      * and squarings. Firstly, when multiplying by an element of the window
      * W[i], we do a constant-trace table lookup to obfuscate i. This leaves
      * squarings as having a different memory access patterns from other
-     * multiplications. So secondly, we put the accumulator X in the table as
-     * well, and also do a constant-trace table lookup to multiply by X.
+     * multiplications. So secondly, we put the accumulator in the table as
+     * well, and also do a constant-trace table lookup to multiply by the
+     * accumulator which is W[x_index].
      *
      * This way, all multiplications take the form of a lookup-and-multiply.
      * The number of lookup-and-multiply operations inside each iteration of
@@ -1840,19 +1841,16 @@
      * observe both memory accesses and branches. However, branch prediction
      * exploitation typically requires many traces of execution over the same
      * data, which is defeated by randomized blinding.
-     *
-     * To achieve this, we make a copy of X and we use the table entry in each
-     * calculation from this point on.
      */
     const size_t x_index = 0;
     mbedtls_mpi_init(&W[x_index]);
-    mbedtls_mpi_copy(&W[x_index], X);
 
     j = N->n + 1;
-    /* All W[i] and X must have at least N->n limbs for the mpi_montmul()
-     * and mpi_montred() calls later. Here we ensure that W[1] and X are
-     * large enough, and later we'll grow other W[i] to the same length.
-     * They must not be shrunk midway through this function!
+    /* All W[i] including the accumulator must have at least N->n limbs for
+     * the mpi_montmul() and mpi_montred() calls later. Here we ensure that
+     * W[1] and the accumulator W[x_index] are large enough. later we'll grow
+     * other W[i] to the same length. They must not be shrunk midway through
+     * this function!
      */
     MBEDTLS_MPI_CHK(mbedtls_mpi_grow(&W[x_index], j));
     MBEDTLS_MPI_CHK(mbedtls_mpi_grow(&W[1],  j));
@@ -2033,7 +2031,7 @@
     /*
      * Load the result in the output variable.
      */
-    mbedtls_mpi_copy(X, &W[x_index]);
+    MBEDTLS_MPI_CHK(mbedtls_mpi_copy(X, &W[x_index]));
 
 cleanup:
 
@@ -2311,29 +2309,30 @@
 
 #if defined(MBEDTLS_GENPRIME)
 
-static const int small_prime[] =
-{
-    3,    5,    7,   11,   13,   17,   19,   23,
-    29,   31,   37,   41,   43,   47,   53,   59,
-    61,   67,   71,   73,   79,   83,   89,   97,
-    101,  103,  107,  109,  113,  127,  131,  137,
-    139,  149,  151,  157,  163,  167,  173,  179,
-    181,  191,  193,  197,  199,  211,  223,  227,
-    229,  233,  239,  241,  251,  257,  263,  269,
-    271,  277,  281,  283,  293,  307,  311,  313,
-    317,  331,  337,  347,  349,  353,  359,  367,
-    373,  379,  383,  389,  397,  401,  409,  419,
-    421,  431,  433,  439,  443,  449,  457,  461,
-    463,  467,  479,  487,  491,  499,  503,  509,
-    521,  523,  541,  547,  557,  563,  569,  571,
-    577,  587,  593,  599,  601,  607,  613,  617,
-    619,  631,  641,  643,  647,  653,  659,  661,
-    673,  677,  683,  691,  701,  709,  719,  727,
-    733,  739,  743,  751,  757,  761,  769,  773,
-    787,  797,  809,  811,  821,  823,  827,  829,
-    839,  853,  857,  859,  863,  877,  881,  883,
-    887,  907,  911,  919,  929,  937,  941,  947,
-    953,  967,  971,  977,  983,  991,  997, -103
+/* Gaps between primes, starting at 3. https://oeis.org/A001223 */
+static const unsigned char small_prime_gaps[] = {
+    2, 2, 4, 2, 4, 2, 4, 6,
+    2, 6, 4, 2, 4, 6, 6, 2,
+    6, 4, 2, 6, 4, 6, 8, 4,
+    2, 4, 2, 4, 14, 4, 6, 2,
+    10, 2, 6, 6, 4, 6, 6, 2,
+    10, 2, 4, 2, 12, 12, 4, 2,
+    4, 6, 2, 10, 6, 6, 6, 2,
+    6, 4, 2, 10, 14, 4, 2, 4,
+    14, 6, 10, 2, 4, 6, 8, 6,
+    6, 4, 6, 8, 4, 8, 10, 2,
+    10, 2, 6, 4, 6, 8, 4, 2,
+    4, 12, 8, 4, 8, 4, 6, 12,
+    2, 18, 6, 10, 6, 6, 2, 6,
+    10, 6, 6, 2, 6, 6, 4, 2,
+    12, 10, 2, 4, 6, 6, 2, 12,
+    4, 6, 8, 10, 8, 10, 8, 6,
+    6, 4, 8, 6, 4, 8, 4, 14,
+    10, 12, 2, 10, 2, 4, 2, 10,
+    14, 4, 2, 4, 14, 4, 2, 4,
+    20, 4, 8, 10, 8, 4, 6, 6,
+    14, 4, 6, 6, 8, 6, /*reaches 997*/
+    0 /* the last entry is effectively unused */
 };
 
 /*
@@ -2350,20 +2349,20 @@
     int ret = 0;
     size_t i;
     mbedtls_mpi_uint r;
+    unsigned p = 3; /* The first odd prime */
 
     if ((X->p[0] & 1) == 0) {
         return MBEDTLS_ERR_MPI_NOT_ACCEPTABLE;
     }
 
-    for (i = 0; small_prime[i] > 0; i++) {
-        if (mbedtls_mpi_cmp_int(X, small_prime[i]) <= 0) {
-            return 1;
-        }
-
-        MBEDTLS_MPI_CHK(mbedtls_mpi_mod_int(&r, X, small_prime[i]));
-
+    for (i = 0; i < sizeof(small_prime_gaps); p += small_prime_gaps[i], i++) {
+        MBEDTLS_MPI_CHK(mbedtls_mpi_mod_int(&r, X, p));
         if (r == 0) {
-            return MBEDTLS_ERR_MPI_NOT_ACCEPTABLE;
+            if (mbedtls_mpi_cmp_int(X, p) == 0) {
+                return 1;
+            } else {
+                return MBEDTLS_ERR_MPI_NOT_ACCEPTABLE;
+            }
         }
     }
 
diff --git a/library/bignum_mod.c b/library/bignum_mod.c
index 4d67829..2f0e9ed 100644
--- a/library/bignum_mod.c
+++ b/library/bignum_mod.c
@@ -19,7 +19,7 @@
 
 #include "common.h"
 
-#if defined(MBEDTLS_BIGNUM_C)
+#if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_ECP_WITH_MPI_UINT)
 
 #include <string.h>
 
@@ -403,4 +403,4 @@
     return ret;
 }
 
-#endif /* MBEDTLS_BIGNUM_C */
+#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ECP_WITH_MPI_UINT */
diff --git a/library/bignum_mod_raw.c b/library/bignum_mod_raw.c
index 75cf8c4..5ee1b19 100644
--- a/library/bignum_mod_raw.c
+++ b/library/bignum_mod_raw.c
@@ -19,7 +19,7 @@
 
 #include "common.h"
 
-#if defined(MBEDTLS_BIGNUM_C)
+#if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_ECP_WITH_MPI_UINT)
 
 #include <string.h>
 
@@ -285,4 +285,4 @@
     (void) mbedtls_mpi_core_add_if(X, N->p, N->limbs, (unsigned) borrow);
 }
 
-#endif /* MBEDTLS_BIGNUM_C */
+#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ECP_WITH_MPI_UINT */
diff --git a/library/common.h b/library/common.h
index 97dc1d3..3c472c6 100644
--- a/library/common.h
+++ b/library/common.h
@@ -288,7 +288,7 @@
 /* Normal case (64-bit pointers): use "r" as the constraint for pointer operands to asm */
 #define MBEDTLS_ASM_AARCH64_PTR_CONSTRAINT "r"
 #else
-#error Unrecognised pointer size for aarch64
+#error "Unrecognised pointer size for aarch64"
 #endif
 #endif
 
diff --git a/library/constant_time.c b/library/constant_time.c
index 832ded9..d3c69cf 100644
--- a/library/constant_time.c
+++ b/library/constant_time.c
@@ -82,7 +82,7 @@
 #elif defined(MBEDTLS_CT_AARCH64_ASM)
     asm volatile ("ldr %w0, [%1]" : "=r" (r) : MBEDTLS_ASM_AARCH64_PTR_CONSTRAINT(p) :);
 #else
-#error No assembly defined for mbedtls_get_unaligned_volatile_uint32
+#error "No assembly defined for mbedtls_get_unaligned_volatile_uint32"
 #endif
     return r;
 }
@@ -150,8 +150,13 @@
                           const unsigned char *src2,
                           size_t len)
 {
+#if defined(MBEDTLS_CT_SIZE_64)
+    const uint64_t mask     = (uint64_t) condition;
+    const uint64_t not_mask = (uint64_t) ~mbedtls_ct_compiler_opaque(condition);
+#else
     const uint32_t mask     = (uint32_t) condition;
     const uint32_t not_mask = (uint32_t) ~mbedtls_ct_compiler_opaque(condition);
+#endif
 
     /* If src2 is NULL, setup src2 so that we read from the destination address.
      *
@@ -165,11 +170,19 @@
     /* dest[i] = c1 == c2 ? src[i] : dest[i] */
     size_t i = 0;
 #if defined(MBEDTLS_EFFICIENT_UNALIGNED_ACCESS)
+#if defined(MBEDTLS_CT_SIZE_64)
+    for (; (i + 8) <= len; i += 8) {
+        uint64_t a = mbedtls_get_unaligned_uint64(src1 + i) & mask;
+        uint64_t b = mbedtls_get_unaligned_uint64(src2 + i) & not_mask;
+        mbedtls_put_unaligned_uint64(dest + i, a | b);
+    }
+#else
     for (; (i + 4) <= len; i += 4) {
         uint32_t a = mbedtls_get_unaligned_uint32(src1 + i) & mask;
         uint32_t b = mbedtls_get_unaligned_uint32(src2 + i) & not_mask;
         mbedtls_put_unaligned_uint32(dest + i, a | b);
     }
+#endif /* defined(MBEDTLS_CT_SIZE_64) */
 #endif /* MBEDTLS_EFFICIENT_UNALIGNED_ACCESS */
     for (; i < len; i++) {
         dest[i] = (src1[i] & mask) | (src2[i] & not_mask);
diff --git a/library/constant_time_impl.h b/library/constant_time_impl.h
index 0c3cde9..8da15a8 100644
--- a/library/constant_time_impl.h
+++ b/library/constant_time_impl.h
@@ -48,8 +48,14 @@
     #pragma GCC diagnostic ignored "-Wredundant-decls"
 #endif
 
-/* Disable asm under Memsan because it confuses Memsan and generates false errors */
-#if defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN)
+/* Disable asm under Memsan because it confuses Memsan and generates false errors.
+ *
+ * We also disable under Valgrind by default, because it's more useful
+ * for Valgrind to test the plain C implementation. MBEDTLS_TEST_CONSTANT_FLOW_ASM //no-check-names
+ * may be set to permit building asm under Valgrind.
+ */
+#if defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN) || \
+    (defined(MBEDTLS_TEST_CONSTANT_FLOW_VALGRIND) && !defined(MBEDTLS_TEST_CONSTANT_FLOW_ASM)) //no-check-names
 #define MBEDTLS_CT_NO_ASM
 #elif defined(__has_feature)
 #if __has_feature(memory_sanitizer)
@@ -109,6 +115,28 @@
 #endif
 }
 
+/*
+ * Selecting unified syntax is needed for gcc, and harmless on clang.
+ *
+ * This is needed because on Thumb 1, condition flags are always set, so
+ * e.g. "negs" is supported but "neg" is not (on Thumb 2, both exist).
+ *
+ * Under Thumb 1 unified syntax, only the "negs" form is accepted, and
+ * under divided syntax, only the "neg" form is accepted. clang only
+ * supports unified syntax.
+ *
+ * On Thumb 2 and Arm, both compilers are happy with the "s" suffix,
+ * although we don't actually care about setting the flags.
+ *
+ * For gcc, restore divided syntax afterwards - otherwise old versions of gcc
+ * seem to apply unified syntax globally, which breaks other asm code.
+ */
+#if !defined(__clang__)
+#define RESTORE_ASM_SYNTAX  ".syntax divided             \n\t"
+#else
+#define RESTORE_ASM_SYNTAX
+#endif
+
 /* Convert a number into a condition in constant time. */
 static inline mbedtls_ct_condition_t mbedtls_ct_bool(mbedtls_ct_uint_t x)
 {
@@ -120,6 +148,34 @@
      * Otherwise, we define a plain C fallback which (in May 2023) does not get optimised into
      * conditional instructions or branches by trunk clang, gcc, or MSVC v19.
      */
+#if defined(MBEDTLS_CT_AARCH64_ASM) && (defined(MBEDTLS_CT_SIZE_32) || defined(MBEDTLS_CT_SIZE_64))
+    mbedtls_ct_uint_t s;
+    asm volatile ("neg %x[s], %x[x]                     \n\t"
+                  "orr %x[x], %x[s], %x[x]              \n\t"
+                  "asr %x[x], %x[x], 63"
+                  :
+                  [s] "=&r" (s),
+                  [x] "+&r" (x)
+                  :
+                  :
+                  );
+    return (mbedtls_ct_condition_t) x;
+#elif defined(MBEDTLS_CT_ARM_ASM) && defined(MBEDTLS_CT_SIZE_32)
+    uint32_t s;
+    asm volatile (".syntax unified                       \n\t"
+                  "negs %[s], %[x]                       \n\t"
+                  "orrs %[x], %[x], %[s]                 \n\t"
+                  "asrs %[x], %[x], #31                  \n\t"
+                  RESTORE_ASM_SYNTAX
+                  :
+                  [s] "=&l" (s),
+                  [x] "+&l" (x)
+                  :
+                  :
+                  "cc" /* clobbers flag bits */
+                  );
+    return (mbedtls_ct_condition_t) x;
+#else
     const mbedtls_ct_uint_t xo = mbedtls_ct_compiler_opaque(x);
 #if defined(_MSC_VER)
     /* MSVC has a warning about unary minus on unsigned, but this is
@@ -127,24 +183,98 @@
 #pragma warning( push )
 #pragma warning( disable : 4146 )
 #endif
-    return (mbedtls_ct_condition_t) (((mbedtls_ct_int_t) ((-xo) | -(xo >> 1))) >>
-                                     (MBEDTLS_CT_SIZE - 1));
+    // y is negative (i.e., top bit set) iff x is non-zero
+    mbedtls_ct_int_t y = (-xo) | -(xo >> 1);
+
+    // extract only the sign bit of y so that y == 1 (if x is non-zero) or 0 (if x is zero)
+    y = (((mbedtls_ct_uint_t) y) >> (MBEDTLS_CT_SIZE - 1));
+
+    // -y has all bits set (if x is non-zero), or all bits clear (if x is zero)
+    return (mbedtls_ct_condition_t) (-y);
 #if defined(_MSC_VER)
 #pragma warning( pop )
 #endif
+#endif
 }
 
 static inline mbedtls_ct_uint_t mbedtls_ct_if(mbedtls_ct_condition_t condition,
                                               mbedtls_ct_uint_t if1,
                                               mbedtls_ct_uint_t if0)
 {
+#if defined(MBEDTLS_CT_AARCH64_ASM) && (defined(MBEDTLS_CT_SIZE_32) || defined(MBEDTLS_CT_SIZE_64))
+    asm volatile ("and %x[if1], %x[if1], %x[condition]       \n\t"
+                  "mvn %x[condition], %x[condition]          \n\t"
+                  "and %x[condition], %x[condition], %x[if0] \n\t"
+                  "orr %x[condition], %x[if1], %x[condition]"
+                  :
+                  [condition] "+&r" (condition),
+                  [if1] "+&r" (if1)
+                  :
+                  [if0] "r" (if0)
+                  :
+                  );
+    return (mbedtls_ct_uint_t) condition;
+#elif defined(MBEDTLS_CT_ARM_ASM) && defined(MBEDTLS_CT_SIZE_32)
+    asm volatile (".syntax unified                           \n\t"
+                  "ands %[if1], %[if1], %[condition]         \n\t"
+                  "mvns %[condition], %[condition]           \n\t"
+                  "ands %[condition], %[condition], %[if0]   \n\t"
+                  "orrs %[condition], %[if1], %[condition]   \n\t"
+                  RESTORE_ASM_SYNTAX
+                  :
+                  [condition] "+&l" (condition),
+                  [if1] "+&l" (if1)
+                  :
+                  [if0] "l" (if0)
+                  :
+                  "cc"
+                  );
+    return (mbedtls_ct_uint_t) condition;
+#else
     mbedtls_ct_condition_t not_cond =
         (mbedtls_ct_condition_t) (~mbedtls_ct_compiler_opaque(condition));
     return (mbedtls_ct_uint_t) ((condition & if1) | (not_cond & if0));
+#endif
 }
 
 static inline mbedtls_ct_condition_t mbedtls_ct_uint_lt(mbedtls_ct_uint_t x, mbedtls_ct_uint_t y)
 {
+#if defined(MBEDTLS_CT_AARCH64_ASM) && (defined(MBEDTLS_CT_SIZE_32) || defined(MBEDTLS_CT_SIZE_64))
+    uint64_t s1;
+    asm volatile ("eor     %x[s1], %x[y], %x[x]          \n\t"
+                  "sub     %x[x], %x[x], %x[y]           \n\t"
+                  "bic     %x[x], %x[x], %x[s1]          \n\t"
+                  "and     %x[s1], %x[s1], %x[y]         \n\t"
+                  "orr     %x[s1], %x[x], %x[s1]         \n\t"
+                  "asr     %x[x], %x[s1], 63"
+                  : [s1] "=&r" (s1), [x] "+&r" (x)
+                  : [y] "r" (y)
+                  :
+                  );
+    return (mbedtls_ct_condition_t) x;
+#elif defined(MBEDTLS_CT_ARM_ASM) && defined(MBEDTLS_CT_SIZE_32)
+    uint32_t s1;
+    asm volatile (
+        ".syntax unified                    \n\t"
+#if defined(__thumb__) && !defined(__thumb2__)
+        "movs     %[s1], %[x]               \n\t"
+        "eors     %[s1], %[s1], %[y]        \n\t"
+#else
+        "eors     %[s1], %[x], %[y]         \n\t"
+#endif
+        "subs    %[x], %[x], %[y]           \n\t"
+        "bics    %[x], %[x], %[s1]          \n\t"
+        "ands    %[y], %[s1], %[y]          \n\t"
+        "orrs    %[x], %[x], %[y]           \n\t"
+        "asrs    %[x], %[x], #31            \n\t"
+        RESTORE_ASM_SYNTAX
+        : [s1] "=&l" (s1), [x] "+&l" (x),  [y] "+&l" (y)
+        :
+        :
+        "cc"
+        );
+    return (mbedtls_ct_condition_t) x;
+#else
     /* Ensure that the compiler cannot optimise the following operations over x and y,
      * even if it knows the value of x and y.
      */
@@ -173,6 +303,7 @@
 
     // Convert to a condition (i.e., all bits set iff non-zero)
     return mbedtls_ct_bool(ret);
+#endif
 }
 
 static inline mbedtls_ct_condition_t mbedtls_ct_uint_ne(mbedtls_ct_uint_t x, mbedtls_ct_uint_t y)
@@ -189,8 +320,8 @@
                                                          unsigned char c,
                                                          unsigned char t)
 {
-    const unsigned char co = (const unsigned char) mbedtls_ct_compiler_opaque(c);
-    const unsigned char to = (const unsigned char) mbedtls_ct_compiler_opaque(t);
+    const unsigned char co = (unsigned char) mbedtls_ct_compiler_opaque(c);
+    const unsigned char to = (unsigned char) mbedtls_ct_compiler_opaque(t);
 
     /* low_mask is: 0 if low <= c, 0x...ff if low > c */
     unsigned low_mask = ((unsigned) co - low) >> 8;
diff --git a/library/constant_time_internal.h b/library/constant_time_internal.h
index dabf720..44b74ae 100644
--- a/library/constant_time_internal.h
+++ b/library/constant_time_internal.h
@@ -85,12 +85,14 @@
 typedef uint64_t  mbedtls_ct_condition_t;
 typedef uint64_t  mbedtls_ct_uint_t;
 typedef int64_t   mbedtls_ct_int_t;
+#define MBEDTLS_CT_SIZE_64
 #define MBEDTLS_CT_TRUE  ((mbedtls_ct_condition_t) mbedtls_ct_compiler_opaque(UINT64_MAX))
 #else
 /* Pointer size <= 32-bit, and no 64-bit MPIs */
 typedef uint32_t  mbedtls_ct_condition_t;
 typedef uint32_t  mbedtls_ct_uint_t;
 typedef int32_t   mbedtls_ct_int_t;
+#define MBEDTLS_CT_SIZE_32
 #define MBEDTLS_CT_TRUE  ((mbedtls_ct_condition_t) mbedtls_ct_compiler_opaque(UINT32_MAX))
 #endif
 #define MBEDTLS_CT_FALSE ((mbedtls_ct_condition_t) mbedtls_ct_compiler_opaque(0))
diff --git a/library/ecdsa.c b/library/ecdsa.c
index 1faec16..6e55f22 100644
--- a/library/ecdsa.c
+++ b/library/ecdsa.c
@@ -373,7 +373,7 @@
 
 #if defined(MBEDTLS_ECP_RESTARTABLE)
     if (rs_ctx != NULL && rs_ctx->sig != NULL) {
-        mbedtls_mpi_copy(r, pr);
+        MBEDTLS_MPI_CHK(mbedtls_mpi_copy(r, pr));
     }
 #endif
 
@@ -447,7 +447,7 @@
     MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(d, data, grp_len));
     MBEDTLS_MPI_CHK(derive_mpi(grp, &h, buf, blen));
     MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&h, data + grp_len, grp_len));
-    mbedtls_hmac_drbg_seed_buf(p_rng, md_info, data, 2 * grp_len);
+    MBEDTLS_MPI_CHK(mbedtls_hmac_drbg_seed_buf(p_rng, md_info, data, 2 * grp_len));
 
 #if defined(MBEDTLS_ECP_RESTARTABLE)
     if (rs_ctx != NULL && rs_ctx->det != NULL) {
diff --git a/library/entropy_poll.c b/library/entropy_poll.c
index f90167c..bc71307 100644
--- a/library/entropy_poll.c
+++ b/library/entropy_poll.c
@@ -75,7 +75,7 @@
     return 0;
 }
 #else /* !_WIN32_WINNT_WINXP */
-#error Entropy not available before Windows XP, use MBEDTLS_NO_PLATFORM_ENTROPY
+#error "Entropy not available before Windows XP, use MBEDTLS_NO_PLATFORM_ENTROPY"
 #endif /* !_WIN32_WINNT_WINXP */
 #else /* _WIN32 && !EFIX64 && !EFI32 */
 
diff --git a/library/gcm.c b/library/gcm.c
index a05e4c3..786290f 100644
--- a/library/gcm.c
+++ b/library/gcm.c
@@ -98,7 +98,7 @@
 #endif
 
 #if defined(MBEDTLS_AESCE_C) && defined(MBEDTLS_HAVE_ARM64)
-    if (mbedtls_aesce_has_support()) {
+    if (MBEDTLS_AESCE_HAS_SUPPORT()) {
         return 0;
     }
 #endif
@@ -209,7 +209,7 @@
 #endif /* MBEDTLS_AESNI_HAVE_CODE */
 
 #if defined(MBEDTLS_AESCE_C) && defined(MBEDTLS_HAVE_ARM64)
-    if (mbedtls_aesce_has_support()) {
+    if (MBEDTLS_AESCE_HAS_SUPPORT()) {
         unsigned char h[16];
 
         /* mbedtls_aesce_gcm_mult needs big-endian input */
@@ -884,6 +884,13 @@
             mbedtls_printf("  GCM note: using AESNI.\n");
         } else
 #endif
+
+#if defined(MBEDTLS_AESCE_C) && defined(MBEDTLS_HAVE_ARM64)
+        if (MBEDTLS_AESCE_HAS_SUPPORT()) {
+            mbedtls_printf("  GCM note: using AESCE.\n");
+        } else
+#endif
+
         mbedtls_printf("  GCM note: built-in implementation.\n");
 #endif /* MBEDTLS_GCM_ALT */
     }
diff --git a/library/padlock.h b/library/padlock.h
index b5f0d7d..ae5c486 100644
--- a/library/padlock.h
+++ b/library/padlock.h
@@ -42,6 +42,8 @@
 #if defined(MBEDTLS_HAVE_ASM) && defined(__GNUC__) && defined(__i386__) && \
     !defined(MBEDTLS_HAVE_ASAN)
 
+#define MBEDTLS_VIA_PADLOCK_HAVE_CODE
+
 #ifndef MBEDTLS_HAVE_X86
 #define MBEDTLS_HAVE_X86
 #endif
diff --git a/library/psa_crypto_pake.c b/library/psa_crypto_pake.c
index caba5a1..8de8569 100644
--- a/library/psa_crypto_pake.c
+++ b/library/psa_crypto_pake.c
@@ -178,12 +178,12 @@
         return status;
     }
 
-    psa_crypto_driver_pake_get_user_len(inputs, &user_len);
+    status = psa_crypto_driver_pake_get_user_len(inputs, &user_len);
     if (status != PSA_SUCCESS) {
         return status;
     }
 
-    psa_crypto_driver_pake_get_peer_len(inputs, &peer_len);
+    status = psa_crypto_driver_pake_get_peer_len(inputs, &peer_len);
     if (status != PSA_SUCCESS) {
         return status;
     }
diff --git a/library/psa_crypto_storage.h b/library/psa_crypto_storage.h
index 04768f8..edd9b94 100644
--- a/library/psa_crypto_storage.h
+++ b/library/psa_crypto_storage.h
@@ -39,7 +39,7 @@
 /* Sanity check: a file size must fit in 32 bits. Allow a generous
  * 64kB of metadata. */
 #if PSA_CRYPTO_MAX_STORAGE_SIZE > 0xffff0000
-#error PSA_CRYPTO_MAX_STORAGE_SIZE > 0xffff0000
+#error "PSA_CRYPTO_MAX_STORAGE_SIZE > 0xffff0000"
 #endif
 
 /** The maximum permitted persistent slot number.
diff --git a/library/rsa_alt_helpers.c b/library/rsa_alt_helpers.c
index 3451469..5cc4636 100644
--- a/library/rsa_alt_helpers.c
+++ b/library/rsa_alt_helpers.c
@@ -126,7 +126,7 @@
     }
 
     for (; attempt < num_primes; ++attempt) {
-        mbedtls_mpi_lset(&K, primes[attempt]);
+        MBEDTLS_MPI_CHK(mbedtls_mpi_lset(&K, primes[attempt]));
 
         /* Check if gcd(K,N) = 1 */
         MBEDTLS_MPI_CHK(mbedtls_mpi_gcd(P, &K, N));
diff --git a/library/x509_crt.c b/library/x509_crt.c
index b40bad2..2cbced2 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -1599,7 +1599,7 @@
 cleanup:
     FindClose(hFind);
 #else /* !_WIN32_WINNT_XP */
-#error mbedtls_x509_crt_parse_path not available before Windows XP
+#error "mbedtls_x509_crt_parse_path not available before Windows XP"
 #endif /* !_WIN32_WINNT_XP */
 #else /* _WIN32 */
     int t_ret;
diff --git a/programs/test/generate_cpp_dummy_build.sh b/programs/test/generate_cpp_dummy_build.sh
index 94e9115..2541683 100755
--- a/programs/test/generate_cpp_dummy_build.sh
+++ b/programs/test/generate_cpp_dummy_build.sh
@@ -63,6 +63,7 @@
     for header in include/mbedtls/*.h include/psa/*.h; do
         case ${header#include/} in
             mbedtls/mbedtls_config.h) :;; # not meant for direct inclusion
+            mbedtls/config_*.h) :;; # not meant for direct inclusion
             psa/crypto_config.h) :;; # not meant for direct inclusion
             # Some of the psa/crypto_*.h headers are not meant to be included
             # directly. They do have include guards that make them no-ops if
diff --git a/programs/test/selftest.c b/programs/test/selftest.c
index f896d4f..cc5e00e 100644
--- a/programs/test/selftest.c
+++ b/programs/test/selftest.c
@@ -73,23 +73,51 @@
     void *empty2 = mbedtls_calloc(0, 1);
     void *buffer1 = mbedtls_calloc(1, 1);
     void *buffer2 = mbedtls_calloc(1, 1);
+    unsigned int buffer_3_size = 256;
+    unsigned int buffer_4_size = 4097; /* Allocate more than the usual page size */
+    unsigned char *buffer3 = mbedtls_calloc(buffer_3_size, 1);
+    unsigned char *buffer4 = mbedtls_calloc(buffer_4_size, 1);
 
     if (empty1 == NULL && empty2 == NULL) {
         if (verbose) {
-            mbedtls_printf("  CALLOC(0): passed (NULL)\n");
+            mbedtls_printf("  CALLOC(0,1): passed (NULL)\n");
         }
     } else if (empty1 == NULL || empty2 == NULL) {
         if (verbose) {
-            mbedtls_printf("  CALLOC(0): failed (mix of NULL and non-NULL)\n");
+            mbedtls_printf("  CALLOC(0,1): failed (mix of NULL and non-NULL)\n");
         }
         ++failures;
     } else if (empty1 == empty2) {
         if (verbose) {
-            mbedtls_printf("  CALLOC(0): passed (same non-null)\n");
+            mbedtls_printf("  CALLOC(0,1): passed (same non-null)\n");
         }
     } else {
         if (verbose) {
-            mbedtls_printf("  CALLOC(0): passed (distinct non-null)\n");
+            mbedtls_printf("  CALLOC(0,1): passed (distinct non-null)\n");
+        }
+    }
+
+    mbedtls_free(empty1);
+    mbedtls_free(empty2);
+
+    empty1 = mbedtls_calloc(1, 0);
+    empty2 = mbedtls_calloc(1, 0);
+    if (empty1 == NULL && empty2 == NULL) {
+        if (verbose) {
+            mbedtls_printf("  CALLOC(1,0): passed (NULL)\n");
+        }
+    } else if (empty1 == NULL || empty2 == NULL) {
+        if (verbose) {
+            mbedtls_printf("  CALLOC(1,0): failed (mix of NULL and non-NULL)\n");
+        }
+        ++failures;
+    } else if (empty1 == empty2) {
+        if (verbose) {
+            mbedtls_printf("  CALLOC(1,0): passed (same non-null)\n");
+        }
+    } else {
+        if (verbose) {
+            mbedtls_printf("  CALLOC(1,0): passed (distinct non-null)\n");
         }
     }
 
@@ -122,6 +150,28 @@
         }
     }
 
+    for (unsigned int i = 0; i < buffer_3_size; i++) {
+        if (buffer3[i] != 0) {
+            ++failures;
+            if (verbose) {
+                mbedtls_printf("  CALLOC(%u): failed (memory not initialized to 0)\n",
+                               buffer_3_size);
+            }
+            break;
+        }
+    }
+
+    for (unsigned int i = 0; i < buffer_4_size; i++) {
+        if (buffer4[i] != 0) {
+            ++failures;
+            if (verbose) {
+                mbedtls_printf("  CALLOC(%u): failed (memory not initialized to 0)\n",
+                               buffer_4_size);
+            }
+            break;
+        }
+    }
+
     if (verbose) {
         mbedtls_printf("\n");
     }
@@ -129,6 +179,8 @@
     mbedtls_free(empty2);
     mbedtls_free(buffer1);
     mbedtls_free(buffer2);
+    mbedtls_free(buffer3);
+    mbedtls_free(buffer4);
     return failures;
 }
 #endif /* MBEDTLS_SELF_TEST */
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index e58f528..40b1871 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -530,6 +530,8 @@
                     SET_OID(ext_key_usage->buf, MBEDTLS_OID_TIME_STAMPING);
                 } else if (strcmp(q, "OCSPSigning") == 0) {
                     SET_OID(ext_key_usage->buf, MBEDTLS_OID_OCSP_SIGNING);
+                } else if (strcmp(q, "any") == 0) {
+                    SET_OID(ext_key_usage->buf, MBEDTLS_OID_ANY_EXTENDED_KEY_USAGE);
                 } else {
                     mbedtls_printf("Invalid argument for option %s\n", p);
                     goto usage;
diff --git a/scripts/code_size_compare.py b/scripts/code_size_compare.py
index 0ed2899..53d859e 100755
--- a/scripts/code_size_compare.py
+++ b/scripts/code_size_compare.py
@@ -24,15 +24,18 @@
 # limitations under the License.
 
 import argparse
+import logging
 import os
 import re
+import shutil
 import subprocess
 import sys
 import typing
 from enum import Enum
 
-from mbedtls_dev import typing_util
 from mbedtls_dev import build_tree
+from mbedtls_dev import logging_util
+from mbedtls_dev import typing_util
 
 class SupportedArch(Enum):
     """Supported architecture for code size measurement."""
@@ -42,13 +45,13 @@
     X86_64 = 'x86_64'
     X86 = 'x86'
 
-CONFIG_TFM_MEDIUM_MBEDCRYPTO_H = "../configs/tfm_mbedcrypto_config_profile_medium.h"
-CONFIG_TFM_MEDIUM_PSA_CRYPTO_H = "../configs/crypto_config_profile_medium.h"
+
 class SupportedConfig(Enum):
     """Supported configuration for code size measurement."""
     DEFAULT = 'default'
     TFM_MEDIUM = 'tfm-medium'
 
+
 # Static library
 MBEDTLS_STATIC_LIB = {
     'CRYPTO': 'library/libmbedcrypto.a',
@@ -56,23 +59,111 @@
     'TLS': 'library/libmbedtls.a',
 }
 
+class CodeSizeDistinctInfo: # pylint: disable=too-few-public-methods
+    """Data structure to store possibly distinct information for code size
+    comparison."""
+    def __init__( #pylint: disable=too-many-arguments
+            self,
+            version: str,
+            git_rev: str,
+            arch: str,
+            config: str,
+            compiler: str,
+            opt_level: str,
+    ) -> None:
+        """
+        :param: version: which version to compare with for code size.
+        :param: git_rev: Git revision to calculate code size.
+        :param: arch: architecture to measure code size on.
+        :param: config: Configuration type to calculate code size.
+                        (See SupportedConfig)
+        :param: compiler: compiler used to build library/*.o.
+        :param: opt_level: Options that control optimization. (E.g. -Os)
+        """
+        self.version = version
+        self.git_rev = git_rev
+        self.arch = arch
+        self.config = config
+        self.compiler = compiler
+        self.opt_level = opt_level
+        # Note: Variables below are not initialized by class instantiation.
+        self.pre_make_cmd = [] #type: typing.List[str]
+        self.make_cmd = ''
+
+    def get_info_indication(self):
+        """Return a unique string to indicate Code Size Distinct Information."""
+        return '{git_rev}-{arch}-{config}-{compiler}'.format(**self.__dict__)
+
+
+class CodeSizeCommonInfo: # pylint: disable=too-few-public-methods
+    """Data structure to store common information for code size comparison."""
+    def __init__(
+            self,
+            host_arch: str,
+            measure_cmd: str,
+    ) -> None:
+        """
+        :param host_arch: host architecture.
+        :param measure_cmd: command to measure code size for library/*.o.
+        """
+        self.host_arch = host_arch
+        self.measure_cmd = measure_cmd
+
+    def get_info_indication(self):
+        """Return a unique string to indicate Code Size Common Information."""
+        return '{measure_tool}'\
+               .format(measure_tool=self.measure_cmd.strip().split(' ')[0])
+
+class CodeSizeResultInfo: # pylint: disable=too-few-public-methods
+    """Data structure to store result options for code size comparison."""
+    def __init__( #pylint: disable=too-many-arguments
+            self,
+            record_dir: str,
+            comp_dir: str,
+            with_markdown=False,
+            stdout=False,
+            show_all=False,
+    ) -> None:
+        """
+        :param record_dir: directory to store code size record.
+        :param comp_dir: directory to store results of code size comparision.
+        :param with_markdown: write comparision result into a markdown table.
+                              (Default: False)
+        :param stdout: direct comparison result into sys.stdout.
+                       (Default False)
+        :param show_all: show all objects in comparison result. (Default False)
+        """
+        self.record_dir = record_dir
+        self.comp_dir = comp_dir
+        self.with_markdown = with_markdown
+        self.stdout = stdout
+        self.show_all = show_all
+
+
 DETECT_ARCH_CMD = "cc -dM -E - < /dev/null"
 def detect_arch() -> str:
     """Auto-detect host architecture."""
     cc_output = subprocess.check_output(DETECT_ARCH_CMD, shell=True).decode()
-    if "__aarch64__" in cc_output:
+    if '__aarch64__' in cc_output:
         return SupportedArch.AARCH64.value
-    if "__arm__" in cc_output:
+    if '__arm__' in cc_output:
         return SupportedArch.AARCH32.value
-    if "__x86_64__" in cc_output:
+    if '__x86_64__' in cc_output:
         return SupportedArch.X86_64.value
-    if "__x86__" in cc_output:
+    if '__i386__' in cc_output:
         return SupportedArch.X86.value
     else:
         print("Unknown host architecture, cannot auto-detect arch.")
         sys.exit(1)
 
-class CodeSizeInfo: # pylint: disable=too-few-public-methods
+TFM_MEDIUM_CONFIG_H = 'configs/tfm_mbedcrypto_config_profile_medium.h'
+TFM_MEDIUM_CRYPTO_CONFIG_H = 'configs/crypto_config_profile_medium.h'
+
+CONFIG_H = 'include/mbedtls/mbedtls_config.h'
+CRYPTO_CONFIG_H = 'include/psa/crypto_config.h'
+BACKUP_SUFFIX = '.code_size.bak'
+
+class CodeSizeBuildInfo: # pylint: disable=too-few-public-methods
     """Gather information used to measure code size.
 
     It collects information about architecture, configuration in order to
@@ -80,90 +171,367 @@
     """
 
     SupportedArchConfig = [
-        "-a " + SupportedArch.AARCH64.value + " -c " + SupportedConfig.DEFAULT.value,
-        "-a " + SupportedArch.AARCH32.value + " -c " + SupportedConfig.DEFAULT.value,
-        "-a " + SupportedArch.X86_64.value  + " -c " + SupportedConfig.DEFAULT.value,
-        "-a " + SupportedArch.X86.value     + " -c " + SupportedConfig.DEFAULT.value,
-        "-a " + SupportedArch.ARMV8_M.value + " -c " + SupportedConfig.TFM_MEDIUM.value,
+        '-a ' + SupportedArch.AARCH64.value + ' -c ' + SupportedConfig.DEFAULT.value,
+        '-a ' + SupportedArch.AARCH32.value + ' -c ' + SupportedConfig.DEFAULT.value,
+        '-a ' + SupportedArch.X86_64.value  + ' -c ' + SupportedConfig.DEFAULT.value,
+        '-a ' + SupportedArch.X86.value     + ' -c ' + SupportedConfig.DEFAULT.value,
+        '-a ' + SupportedArch.ARMV8_M.value + ' -c ' + SupportedConfig.TFM_MEDIUM.value,
     ]
 
-    def __init__(self, arch: str, config: str, sys_arch: str) -> None:
+    def __init__(
+            self,
+            size_dist_info: CodeSizeDistinctInfo,
+            host_arch: str,
+            logger: logging.Logger,
+    ) -> None:
         """
-        arch: architecture to measure code size on.
-        config: configuration type to measure code size with.
-        sys_arch: host architecture.
-        make_command: command to build library (Inferred from arch and config).
+        :param size_dist_info:
+            CodeSizeDistinctInfo containing info for code size measurement.
+                - size_dist_info.arch: architecture to measure code size on.
+                - size_dist_info.config: configuration type to measure
+                                         code size with.
+                - size_dist_info.compiler: compiler used to build library/*.o.
+                - size_dist_info.opt_level: Options that control optimization.
+                                            (E.g. -Os)
+        :param host_arch: host architecture.
+        :param logger: logging module
         """
-        self.arch = arch
-        self.config = config
-        self.sys_arch = sys_arch
-        self.make_command = self.set_make_command()
+        self.arch = size_dist_info.arch
+        self.config = size_dist_info.config
+        self.compiler = size_dist_info.compiler
+        self.opt_level = size_dist_info.opt_level
 
-    def set_make_command(self) -> str:
-        """Infer build command based on architecture and configuration."""
+        self.make_cmd = ['make', '-j', 'lib']
 
+        self.host_arch = host_arch
+        self.logger = logger
+
+    def check_correctness(self) -> bool:
+        """Check whether we are using proper / supported combination
+        of information to build library/*.o."""
+
+        # default config
         if self.config == SupportedConfig.DEFAULT.value and \
-            self.arch == self.sys_arch:
-            return 'make -j lib CFLAGS=\'-Os \' '
+            self.arch == self.host_arch:
+            return True
+        # TF-M
         elif self.arch == SupportedArch.ARMV8_M.value and \
              self.config == SupportedConfig.TFM_MEDIUM.value:
-            return \
-                 'make -j lib CC=armclang \
-                  CFLAGS=\'--target=arm-arm-none-eabi -mcpu=cortex-m33 -Os \
-                 -DMBEDTLS_CONFIG_FILE=\\\"' + CONFIG_TFM_MEDIUM_MBEDCRYPTO_H + '\\\" \
-                 -DMBEDTLS_PSA_CRYPTO_CONFIG_FILE=\\\"' + CONFIG_TFM_MEDIUM_PSA_CRYPTO_H + '\\\" \''
+            return True
+
+        return False
+
+    def infer_pre_make_command(self) -> typing.List[str]:
+        """Infer command to set up proper configuration before running make."""
+        pre_make_cmd = [] #type: typing.List[str]
+        if self.config == SupportedConfig.TFM_MEDIUM.value:
+            pre_make_cmd.append('cp {src} {dest}'
+                                .format(src=TFM_MEDIUM_CONFIG_H, dest=CONFIG_H))
+            pre_make_cmd.append('cp {src} {dest}'
+                                .format(src=TFM_MEDIUM_CRYPTO_CONFIG_H,
+                                        dest=CRYPTO_CONFIG_H))
+
+        return pre_make_cmd
+
+    def infer_make_cflags(self) -> str:
+        """Infer CFLAGS by instance attributes in CodeSizeDistinctInfo."""
+        cflags = [] #type: typing.List[str]
+
+        # set optimization level
+        cflags.append(self.opt_level)
+        # set compiler by config
+        if self.config == SupportedConfig.TFM_MEDIUM.value:
+            self.compiler = 'armclang'
+            cflags.append('-mcpu=cortex-m33')
+        # set target
+        if self.compiler == 'armclang':
+            cflags.append('--target=arm-arm-none-eabi')
+
+        return ' '.join(cflags)
+
+    def infer_make_command(self) -> str:
+        """Infer make command by CFLAGS and CC."""
+
+        if self.check_correctness():
+            # set CFLAGS=
+            self.make_cmd.append('CFLAGS=\'{}\''.format(self.infer_make_cflags()))
+            # set CC=
+            self.make_cmd.append('CC={}'.format(self.compiler))
+            return ' '.join(self.make_cmd)
         else:
-            print("Unsupported combination of architecture: {} and configuration: {}"
-                  .format(self.arch, self.config))
-            print("\nPlease use supported combination of architecture and configuration:")
-            for comb in CodeSizeInfo.SupportedArchConfig:
-                print(comb)
-            print("\nFor your system, please use:")
-            for comb in CodeSizeInfo.SupportedArchConfig:
-                if "default" in comb and self.sys_arch not in comb:
+            self.logger.error("Unsupported combination of architecture: {} " \
+                              "and configuration: {}.\n"
+                              .format(self.arch,
+                                      self.config))
+            self.logger.error("Please use supported combination of " \
+                             "architecture and configuration:")
+            for comb in CodeSizeBuildInfo.SupportedArchConfig:
+                self.logger.error(comb)
+            self.logger.error("")
+            self.logger.error("For your system, please use:")
+            for comb in CodeSizeBuildInfo.SupportedArchConfig:
+                if "default" in comb and self.host_arch not in comb:
                     continue
-                print(comb)
+                self.logger.error(comb)
             sys.exit(1)
 
-class SizeEntry: # pylint: disable=too-few-public-methods
-    """Data Structure to only store information of code size."""
-    def __init__(self, text, data, bss, dec):
-        self.text = text
-        self.data = data
-        self.bss = bss
-        self.total = dec # total <=> dec
 
-class CodeSizeBase:
+class CodeSizeCalculator:
+    """ A calculator to calculate code size of library/*.o based on
+    Git revision and code size measurement tool.
+    """
+
+    def __init__( #pylint: disable=too-many-arguments
+            self,
+            git_rev: str,
+            pre_make_cmd: typing.List[str],
+            make_cmd: str,
+            measure_cmd: str,
+            logger: logging.Logger,
+    ) -> None:
+        """
+        :param git_rev: Git revision. (E.g: commit)
+        :param pre_make_cmd: command to set up proper config before running make.
+        :param make_cmd: command to build library/*.o.
+        :param measure_cmd: command to measure code size for library/*.o.
+        :param logger: logging module
+        """
+        self.repo_path = "."
+        self.git_command = "git"
+        self.make_clean = 'make clean'
+
+        self.git_rev = git_rev
+        self.pre_make_cmd = pre_make_cmd
+        self.make_cmd = make_cmd
+        self.measure_cmd = measure_cmd
+        self.logger = logger
+
+    @staticmethod
+    def validate_git_revision(git_rev: str) -> str:
+        result = subprocess.check_output(["git", "rev-parse", "--verify",
+                                          git_rev + "^{commit}"],
+                                         shell=False, universal_newlines=True)
+        return result[:7]
+
+    def _create_git_worktree(self) -> str:
+        """Create a separate worktree for Git revision.
+        If Git revision is current, use current worktree instead."""
+
+        if self.git_rev == 'current':
+            self.logger.debug("Using current work directory.")
+            git_worktree_path = self.repo_path
+        else:
+            self.logger.debug("Creating git worktree for {}."
+                              .format(self.git_rev))
+            git_worktree_path = os.path.join(self.repo_path,
+                                             "temp-" + self.git_rev)
+            subprocess.check_output(
+                [self.git_command, "worktree", "add", "--detach",
+                 git_worktree_path, self.git_rev], cwd=self.repo_path,
+                stderr=subprocess.STDOUT
+            )
+
+        return git_worktree_path
+
+    @staticmethod
+    def backup_config_files(restore: bool) -> None:
+        """Backup / Restore config files."""
+        if restore:
+            shutil.move(CONFIG_H + BACKUP_SUFFIX, CONFIG_H)
+            shutil.move(CRYPTO_CONFIG_H + BACKUP_SUFFIX, CRYPTO_CONFIG_H)
+        else:
+            shutil.copy(CONFIG_H, CONFIG_H + BACKUP_SUFFIX)
+            shutil.copy(CRYPTO_CONFIG_H, CRYPTO_CONFIG_H + BACKUP_SUFFIX)
+
+    def _build_libraries(self, git_worktree_path: str) -> None:
+        """Build library/*.o in the specified worktree."""
+
+        self.logger.debug("Building library/*.o for {}."
+                          .format(self.git_rev))
+        my_environment = os.environ.copy()
+        try:
+            if self.git_rev == 'current':
+                self.backup_config_files(restore=False)
+            for pre_cmd in self.pre_make_cmd:
+                subprocess.check_output(
+                    pre_cmd, env=my_environment, shell=True,
+                    cwd=git_worktree_path, stderr=subprocess.STDOUT,
+                    universal_newlines=True
+                )
+            subprocess.check_output(
+                self.make_clean, env=my_environment, shell=True,
+                cwd=git_worktree_path, stderr=subprocess.STDOUT,
+                universal_newlines=True
+            )
+            subprocess.check_output(
+                self.make_cmd, env=my_environment, shell=True,
+                cwd=git_worktree_path, stderr=subprocess.STDOUT,
+                universal_newlines=True
+            )
+            if self.git_rev == 'current':
+                self.backup_config_files(restore=True)
+        except subprocess.CalledProcessError as e:
+            self._handle_called_process_error(e, git_worktree_path)
+
+    def _gen_raw_code_size(self, git_worktree_path: str) -> typing.Dict[str, str]:
+        """Measure code size by a tool and return in UTF-8 encoding."""
+
+        self.logger.debug("Measuring code size for {} by `{}`."
+                          .format(self.git_rev,
+                                  self.measure_cmd.strip().split(' ')[0]))
+
+        res = {}
+        for mod, st_lib in MBEDTLS_STATIC_LIB.items():
+            try:
+                result = subprocess.check_output(
+                    [self.measure_cmd + ' ' + st_lib], cwd=git_worktree_path,
+                    shell=True, universal_newlines=True
+                )
+                res[mod] = result
+            except subprocess.CalledProcessError as e:
+                self._handle_called_process_error(e, git_worktree_path)
+
+        return res
+
+    def _remove_worktree(self, git_worktree_path: str) -> None:
+        """Remove temporary worktree."""
+        if git_worktree_path != self.repo_path:
+            self.logger.debug("Removing temporary worktree {}."
+                              .format(git_worktree_path))
+            subprocess.check_output(
+                [self.git_command, "worktree", "remove", "--force",
+                 git_worktree_path], cwd=self.repo_path,
+                stderr=subprocess.STDOUT
+            )
+
+    def _handle_called_process_error(self, e: subprocess.CalledProcessError,
+                                     git_worktree_path: str) -> None:
+        """Handle a CalledProcessError and quit the program gracefully.
+        Remove any extra worktrees so that the script may be called again."""
+
+        # Tell the user what went wrong
+        self.logger.error(e, exc_info=True)
+        self.logger.error("Process output:\n {}".format(e.output))
+
+        # Quit gracefully by removing the existing worktree
+        self._remove_worktree(git_worktree_path)
+        sys.exit(-1)
+
+    def cal_libraries_code_size(self) -> typing.Dict[str, str]:
+        """Do a complete round to calculate code size of library/*.o
+        by measurement tool.
+
+        :return A dictionary of measured code size
+            - typing.Dict[mod: str]
+        """
+
+        git_worktree_path = self._create_git_worktree()
+        try:
+            self._build_libraries(git_worktree_path)
+            res = self._gen_raw_code_size(git_worktree_path)
+        finally:
+            self._remove_worktree(git_worktree_path)
+
+        return res
+
+
+class CodeSizeGenerator:
+    """ A generator based on size measurement tool for library/*.o.
+
+    This is an abstract class. To use it, derive a class that implements
+    write_record and write_comparison methods, then call both of them with
+    proper arguments.
+    """
+    def __init__(self, logger: logging.Logger) -> None:
+        """
+        :param logger: logging module
+        """
+        self.logger = logger
+
+    def write_record(
+            self,
+            git_rev: str,
+            code_size_text: typing.Dict[str, str],
+            output: typing_util.Writable
+    ) -> None:
+        """Write size record into a file.
+
+        :param git_rev: Git revision. (E.g: commit)
+        :param code_size_text:
+            string output (utf-8) from measurement tool of code size.
+                - typing.Dict[mod: str]
+        :param output: output stream which the code size record is written to.
+                       (Note: Normally write code size record into File)
+        """
+        raise NotImplementedError
+
+    def write_comparison( #pylint: disable=too-many-arguments
+            self,
+            old_rev: str,
+            new_rev: str,
+            output: typing_util.Writable,
+            with_markdown=False,
+            show_all=False
+    ) -> None:
+        """Write a comparision result into a stream between two Git revisions.
+
+        :param old_rev: old Git revision to compared with.
+        :param new_rev: new Git revision to compared with.
+        :param output: output stream which the code size record is written to.
+                       (File / sys.stdout)
+        :param with_markdown:  write comparision result in a markdown table.
+                               (Default: False)
+        :param show_all: show all objects in comparison result. (Default False)
+        """
+        raise NotImplementedError
+
+
+class CodeSizeGeneratorWithSize(CodeSizeGenerator):
     """Code Size Base Class for size record saving and writing."""
 
-    def __init__(self) -> None:
-        """ Variable code_size is used to store size info for any revisions.
-        code_size: (data format)
-        {revision: {module: {file_name: SizeEntry,
-                             etc ...
-                            },
-                    etc ...
-                   },
-         etc ...
-        }
-        """
-        self.code_size = {} #type: typing.Dict[str, typing.Dict]
+    class SizeEntry: # pylint: disable=too-few-public-methods
+        """Data Structure to only store information of code size."""
+        def __init__(self, text: int, data: int, bss: int, dec: int):
+            self.text = text
+            self.data = data
+            self.bss = bss
+            self.total = dec # total <=> dec
 
-    def set_size_record(self, revision: str, mod: str, size_text: str) -> None:
-        """Store size information for target revision and high-level module.
+    def __init__(self, logger: logging.Logger) -> None:
+        """ Variable code_size is used to store size info for any Git revisions.
+        :param code_size:
+            Data Format as following:
+            code_size = {
+                git_rev: {
+                    module: {
+                        file_name: SizeEntry,
+                        ...
+                    },
+                    ...
+                },
+                ...
+            }
+        """
+        super().__init__(logger)
+        self.code_size = {} #type: typing.Dict[str, typing.Dict]
+        self.mod_total_suffix = '-' + 'TOTALS'
+
+    def _set_size_record(self, git_rev: str, mod: str, size_text: str) -> None:
+        """Store size information for target Git revision and high-level module.
 
         size_text Format: text data bss dec hex filename
         """
         size_record = {}
         for line in size_text.splitlines()[1:]:
             data = line.split()
-            size_record[data[5]] = SizeEntry(data[0], data[1], data[2], data[3])
-        if revision in self.code_size:
-            self.code_size[revision].update({mod: size_record})
-        else:
-            self.code_size[revision] = {mod: size_record}
+            if re.match(r'\s*\(TOTALS\)', data[5]):
+                data[5] = mod + self.mod_total_suffix
+            # file_name: SizeEntry(text, data, bss, dec)
+            size_record[data[5]] = CodeSizeGeneratorWithSize.SizeEntry(
+                int(data[0]), int(data[1]), int(data[2]), int(data[3]))
+        self.code_size.setdefault(git_rev, {}).update({mod: size_record})
 
-    def read_size_record(self, revision: str, fname: str) -> None:
+    def read_size_record(self, git_rev: str, fname: str) -> None:
         """Read size information from csv file and write it into code_size.
 
         fname Format: filename text data bss dec
@@ -179,232 +547,325 @@
                     continue
 
                 if mod:
-                    size_record[data[0]] = \
-                        SizeEntry(data[1], data[2], data[3], data[4])
+                    # file_name: SizeEntry(text, data, bss, dec)
+                    size_record[data[0]] = CodeSizeGeneratorWithSize.SizeEntry(
+                        int(data[1]), int(data[2]), int(data[3]), int(data[4]))
 
                 # check if we hit record for the end of a module
-                m = re.match(r'.?TOTALS', line)
+                m = re.match(r'\w+' + self.mod_total_suffix, line)
                 if m:
-                    if revision in self.code_size:
-                        self.code_size[revision].update({mod: size_record})
+                    if git_rev in self.code_size:
+                        self.code_size[git_rev].update({mod: size_record})
                     else:
-                        self.code_size[revision] = {mod: size_record}
+                        self.code_size[git_rev] = {mod: size_record}
                     mod = ""
                     size_record = {}
 
-    def _size_reader_helper(
+    def write_record(
             self,
-            revision: str,
-            output: typing_util.Writable
-    ) -> typing.Iterator[tuple]:
-        """A helper function to peel code_size based on revision."""
-        for mod, file_size in self.code_size[revision].items():
-            output.write("\n" + mod + "\n")
-            for fname, size_entry in file_size.items():
-                yield mod, fname, size_entry
-
-    def write_size_record(
-            self,
-            revision: str,
+            git_rev: str,
+            code_size_text: typing.Dict[str, str],
             output: typing_util.Writable
     ) -> None:
         """Write size information to a file.
 
-        Writing Format: file_name text data bss total(dec)
+        Writing Format: filename text data bss total(dec)
         """
-        output.write("{:<30} {:>7} {:>7} {:>7} {:>7}\n"
-                     .format("filename", "text", "data", "bss", "total"))
-        for _, fname, size_entry in self._size_reader_helper(revision, output):
-            output.write("{:<30} {:>7} {:>7} {:>7} {:>7}\n"
-                         .format(fname, size_entry.text, size_entry.data,\
-                                 size_entry.bss, size_entry.total))
+        for mod, size_text in code_size_text.items():
+            self._set_size_record(git_rev, mod, size_text)
 
-    def write_comparison(
+        format_string = "{:<30} {:>7} {:>7} {:>7} {:>7}\n"
+        output.write(format_string.format("filename",
+                                          "text", "data", "bss", "total"))
+
+        for mod, f_size in self.code_size[git_rev].items():
+            output.write("\n" + mod + "\n")
+            for fname, size_entry in f_size.items():
+                output.write(format_string
+                             .format(fname,
+                                     size_entry.text, size_entry.data,
+                                     size_entry.bss, size_entry.total))
+
+    def write_comparison( #pylint: disable=too-many-arguments
             self,
             old_rev: str,
             new_rev: str,
-            output: typing_util.Writable
+            output: typing_util.Writable,
+            with_markdown=False,
+            show_all=False
     ) -> None:
+        # pylint: disable=too-many-locals
         """Write comparison result into a file.
 
-        Writing Format: file_name current(total) old(total) change(Byte) change_pct(%)
+        Writing Format:
+            Markdown Output:
+                filename new(text) new(data) change(text) change(data)
+            CSV Output:
+                filename new(text) new(data) old(text) old(data) change(text) change(data)
         """
-        output.write("{:<30} {:>7} {:>7} {:>7} {:>7}\n"
-                     .format("filename", "current", "old", "change", "change%"))
-        for mod, fname, size_entry in self._size_reader_helper(new_rev, output):
-            new_size = int(size_entry.total)
-            # check if we have the file in old revision
-            if fname in self.code_size[old_rev][mod]:
-                old_size = int(self.code_size[old_rev][mod][fname].total)
-                change = new_size - old_size
-                if old_size != 0:
-                    change_pct = change / old_size
-                else:
-                    change_pct = 0
-                output.write("{:<30} {:>7} {:>7} {:>7} {:>7.2%}\n"
-                             .format(fname, new_size, old_size, change, change_pct))
+        header_line = ["filename", "new(text)", "old(text)", "change(text)",
+                       "new(data)", "old(data)", "change(data)"]
+        if with_markdown:
+            dash_line = [":----", "----:", "----:", "----:",
+                         "----:", "----:", "----:"]
+            # | filename | new(text) | new(data) | change(text) | change(data) |
+            line_format = "| {0:<30} | {1:>9} | {4:>9} | {3:>12} | {6:>12} |\n"
+            bold_text = lambda x: '**' + str(x) + '**'
+        else:
+            # filename new(text) new(data) old(text) old(data) change(text) change(data)
+            line_format = "{0:<30} {1:>9} {4:>9} {2:>10} {5:>10} {3:>12} {6:>12}\n"
+
+        def cal_sect_change(
+                old_size: typing.Optional[CodeSizeGeneratorWithSize.SizeEntry],
+                new_size: typing.Optional[CodeSizeGeneratorWithSize.SizeEntry],
+                sect: str
+        ) -> typing.List:
+            """Inner helper function to calculate size change for a section.
+
+            Convention for special cases:
+                - If the object has been removed in new Git revision,
+                  the size is minus code size of old Git revision;
+                  the size change is marked as `Removed`,
+                - If the object only exists in new Git revision,
+                  the size is code size of new Git revision;
+                  the size change is marked as `None`,
+
+            :param: old_size: code size for objects in old Git revision.
+            :param: new_size: code size for objects in new Git revision.
+            :param: sect: section to calculate from `size` tool. This could be
+                          any instance variable in SizeEntry.
+            :return: List of [section size of objects for new Git revision,
+                     section size of objects for old Git revision,
+                     section size change of objects between two Git revisions]
+            """
+            if old_size and new_size:
+                new_attr = new_size.__dict__[sect]
+                old_attr = old_size.__dict__[sect]
+                delta = new_attr - old_attr
+                change_attr = '{0:{1}}'.format(delta, '+' if delta else '')
+            elif old_size:
+                new_attr = 'Removed'
+                old_attr = old_size.__dict__[sect]
+                delta = - old_attr
+                change_attr = '{0:{1}}'.format(delta, '+' if delta else '')
+            elif new_size:
+                new_attr = new_size.__dict__[sect]
+                old_attr = 'NotCreated'
+                delta = new_attr
+                change_attr = '{0:{1}}'.format(delta, '+' if delta else '')
             else:
-                output.write("{} {}\n".format(fname, new_size))
+                # Should never happen
+                new_attr = 'Error'
+                old_attr = 'Error'
+                change_attr = 'Error'
+            return [new_attr, old_attr, change_attr]
+
+        # sort dictionary by key
+        sort_by_k = lambda item: item[0].lower()
+        def get_results(
+                f_rev_size:
+                typing.Dict[str,
+                            typing.Dict[str,
+                                        CodeSizeGeneratorWithSize.SizeEntry]]
+            ) -> typing.List:
+            """Return List of results in the format of:
+            [filename, new(text), old(text), change(text),
+             new(data), old(data), change(data)]
+            """
+            res = []
+            for fname, revs_size in sorted(f_rev_size.items(), key=sort_by_k):
+                old_size = revs_size.get(old_rev)
+                new_size = revs_size.get(new_rev)
+
+                text_sect = cal_sect_change(old_size, new_size, 'text')
+                data_sect = cal_sect_change(old_size, new_size, 'data')
+                # skip the files that haven't changed in code size
+                if not show_all and text_sect[-1] == '0' and data_sect[-1] == '0':
+                    continue
+
+                res.append([fname, *text_sect, *data_sect])
+            return res
+
+        # write header
+        output.write(line_format.format(*header_line))
+        if with_markdown:
+            output.write(line_format.format(*dash_line))
+        for mod in MBEDTLS_STATIC_LIB:
+        # convert self.code_size to:
+        # {
+        #   file_name: {
+        #       old_rev: SizeEntry,
+        #       new_rev: SizeEntry
+        #   },
+        #   ...
+        # }
+            f_rev_size = {} #type: typing.Dict[str, typing.Dict]
+            for fname, size_entry in self.code_size[old_rev][mod].items():
+                f_rev_size.setdefault(fname, {}).update({old_rev: size_entry})
+            for fname, size_entry in self.code_size[new_rev][mod].items():
+                f_rev_size.setdefault(fname, {}).update({new_rev: size_entry})
+
+            mod_total_sz = f_rev_size.pop(mod + self.mod_total_suffix)
+            res = get_results(f_rev_size)
+            total_clm = get_results({mod + self.mod_total_suffix: mod_total_sz})
+            if with_markdown:
+                # bold row of mod-TOTALS in markdown table
+                total_clm = [[bold_text(j) for j in i] for i in total_clm]
+            res += total_clm
+
+            # write comparison result
+            for line in res:
+                output.write(line_format.format(*line))
 
 
-class CodeSizeComparison(CodeSizeBase):
+class CodeSizeComparison:
     """Compare code size between two Git revisions."""
 
-    def __init__(
+    def __init__( #pylint: disable=too-many-arguments
             self,
-            old_revision: str,
-            new_revision: str,
-            result_dir: str,
-            code_size_info: CodeSizeInfo
+            old_size_dist_info: CodeSizeDistinctInfo,
+            new_size_dist_info: CodeSizeDistinctInfo,
+            size_common_info: CodeSizeCommonInfo,
+            result_options: CodeSizeResultInfo,
+            logger: logging.Logger,
     ) -> None:
         """
-        old_revision: revision to compare against.
-        new_revision:
-        result_dir: directory for comparison result.
-        code_size_info: an object containing information to build library.
+        :param old_size_dist_info: CodeSizeDistinctInfo containing old distinct
+                                   info to compare code size with.
+        :param new_size_dist_info: CodeSizeDistinctInfo containing new distinct
+                                   info to take as comparision base.
+        :param size_common_info: CodeSizeCommonInfo containing common info for
+                                 both old and new size distinct info and
+                                 measurement tool.
+        :param result_options: CodeSizeResultInfo containing results options for
+                               code size record and comparision.
+        :param logger: logging module
         """
-        super().__init__()
-        self.repo_path = "."
-        self.result_dir = os.path.abspath(result_dir)
-        os.makedirs(self.result_dir, exist_ok=True)
 
-        self.csv_dir = os.path.abspath("code_size_records/")
+        self.logger = logger
+
+        self.old_size_dist_info = old_size_dist_info
+        self.new_size_dist_info = new_size_dist_info
+        self.size_common_info = size_common_info
+        # infer pre make command
+        self.old_size_dist_info.pre_make_cmd = CodeSizeBuildInfo(
+            self.old_size_dist_info, self.size_common_info.host_arch,
+            self.logger).infer_pre_make_command()
+        self.new_size_dist_info.pre_make_cmd = CodeSizeBuildInfo(
+            self.new_size_dist_info, self.size_common_info.host_arch,
+            self.logger).infer_pre_make_command()
+        # infer make command
+        self.old_size_dist_info.make_cmd = CodeSizeBuildInfo(
+            self.old_size_dist_info, self.size_common_info.host_arch,
+            self.logger).infer_make_command()
+        self.new_size_dist_info.make_cmd = CodeSizeBuildInfo(
+            self.new_size_dist_info, self.size_common_info.host_arch,
+            self.logger).infer_make_command()
+        # initialize size parser with corresponding measurement tool
+        self.code_size_generator = self.__generate_size_parser()
+
+        self.result_options = result_options
+        self.csv_dir = os.path.abspath(self.result_options.record_dir)
         os.makedirs(self.csv_dir, exist_ok=True)
+        self.comp_dir = os.path.abspath(self.result_options.comp_dir)
+        os.makedirs(self.comp_dir, exist_ok=True)
 
-        self.old_rev = old_revision
-        self.new_rev = new_revision
-        self.git_command = "git"
-        self.make_clean = 'make clean'
-        self.make_command = code_size_info.make_command
-        self.fname_suffix = "-" + code_size_info.arch + "-" +\
-                            code_size_info.config
-
-    @staticmethod
-    def validate_revision(revision: str) -> bytes:
-        result = subprocess.check_output(["git", "rev-parse", "--verify",
-                                          revision + "^{commit}"], shell=False)
-        return result
-
-    def _create_git_worktree(self, revision: str) -> str:
-        """Make a separate worktree for revision.
-        Do not modify the current worktree."""
-
-        if revision == "current":
-            print("Using current work directory")
-            git_worktree_path = self.repo_path
+    def __generate_size_parser(self):
+        """Generate a parser for the corresponding measurement tool."""
+        if re.match(r'size', self.size_common_info.measure_cmd.strip()):
+            return CodeSizeGeneratorWithSize(self.logger)
         else:
-            print("Creating git worktree for", revision)
-            git_worktree_path = os.path.join(self.repo_path, "temp-" + revision)
-            subprocess.check_output(
-                [self.git_command, "worktree", "add", "--detach",
-                 git_worktree_path, revision], cwd=self.repo_path,
-                stderr=subprocess.STDOUT
-            )
+            self.logger.error("Unsupported measurement tool: `{}`."
+                              .format(self.size_common_info.measure_cmd
+                                      .strip().split(' ')[0]))
+            sys.exit(1)
 
-        return git_worktree_path
+    def cal_code_size(
+            self,
+            size_dist_info: CodeSizeDistinctInfo
+        ) -> typing.Dict[str, str]:
+        """Calculate code size of library/*.o in a UTF-8 encoding"""
 
-    def _build_libraries(self, git_worktree_path: str) -> None:
-        """Build libraries in the specified worktree."""
+        return CodeSizeCalculator(size_dist_info.git_rev,
+                                  size_dist_info.pre_make_cmd,
+                                  size_dist_info.make_cmd,
+                                  self.size_common_info.measure_cmd,
+                                  self.logger).cal_libraries_code_size()
 
-        my_environment = os.environ.copy()
-        try:
-            subprocess.check_output(
-                self.make_clean, env=my_environment, shell=True,
-                cwd=git_worktree_path, stderr=subprocess.STDOUT,
-            )
-            subprocess.check_output(
-                self.make_command, env=my_environment, shell=True,
-                cwd=git_worktree_path, stderr=subprocess.STDOUT,
-            )
-        except subprocess.CalledProcessError as e:
-            self._handle_called_process_error(e, git_worktree_path)
+    def gen_code_size_report(self, size_dist_info: CodeSizeDistinctInfo) -> None:
+        """Generate code size record and write it into a file."""
 
-    def _gen_code_size_csv(self, revision: str, git_worktree_path: str) -> None:
-        """Generate code size csv file."""
-
-        if revision == "current":
-            print("Measuring code size in current work directory")
-        else:
-            print("Measuring code size for", revision)
-
-        for mod, st_lib in MBEDTLS_STATIC_LIB.items():
-            try:
-                result = subprocess.check_output(
-                    ["size", st_lib, "-t"], cwd=git_worktree_path
-                )
-            except subprocess.CalledProcessError as e:
-                self._handle_called_process_error(e, git_worktree_path)
-            size_text = result.decode("utf-8")
-
-            self.set_size_record(revision, mod, size_text)
-
-        print("Generating code size csv for", revision)
-        csv_file = open(os.path.join(self.csv_dir, revision +
-                                     self.fname_suffix + ".csv"), "w")
-        self.write_size_record(revision, csv_file)
-
-    def _remove_worktree(self, git_worktree_path: str) -> None:
-        """Remove temporary worktree."""
-        if git_worktree_path != self.repo_path:
-            print("Removing temporary worktree", git_worktree_path)
-            subprocess.check_output(
-                [self.git_command, "worktree", "remove", "--force",
-                 git_worktree_path], cwd=self.repo_path,
-                stderr=subprocess.STDOUT
-            )
-
-    def _get_code_size_for_rev(self, revision: str) -> None:
-        """Generate code size csv file for the specified git revision."""
-
+        self.logger.info("Start to generate code size record for {}."
+                         .format(size_dist_info.git_rev))
+        output_file = os.path.join(
+            self.csv_dir,
+            '{}-{}.csv'
+            .format(size_dist_info.get_info_indication(),
+                    self.size_common_info.get_info_indication()))
         # Check if the corresponding record exists
-        csv_fname = revision + self.fname_suffix +  ".csv"
-        if (revision != "current") and \
-           os.path.exists(os.path.join(self.csv_dir, csv_fname)):
-            print("Code size csv file for", revision, "already exists.")
-            self.read_size_record(revision, os.path.join(self.csv_dir, csv_fname))
+        if size_dist_info.git_rev != "current" and \
+           os.path.exists(output_file):
+            self.logger.debug("Code size csv file for {} already exists."
+                              .format(size_dist_info.git_rev))
+            self.code_size_generator.read_size_record(
+                size_dist_info.git_rev, output_file)
         else:
-            git_worktree_path = self._create_git_worktree(revision)
-            self._build_libraries(git_worktree_path)
-            self._gen_code_size_csv(revision, git_worktree_path)
-            self._remove_worktree(git_worktree_path)
+            # measure code size
+            code_size_text = self.cal_code_size(size_dist_info)
 
-    def _gen_code_size_comparison(self) -> int:
-        """Generate results of the size changes between two revisions,
-        old and new. Measured code size results of these two revisions
-        must be available."""
+            self.logger.debug("Generating code size csv for {}."
+                              .format(size_dist_info.git_rev))
+            output = open(output_file, "w")
+            self.code_size_generator.write_record(
+                size_dist_info.git_rev, code_size_text, output)
 
-        res_file = open(os.path.join(self.result_dir, "compare-" +
-                                     self.old_rev + "-" + self.new_rev +
-                                     self.fname_suffix +
-                                     ".csv"), "w")
+    def gen_code_size_comparison(self) -> None:
+        """Generate results of code size changes between two Git revisions,
+        old and new.
 
-        print("\nGenerating comparison results between",\
-                self.old_rev, "and", self.new_rev)
-        self.write_comparison(self.old_rev, self.new_rev, res_file)
+        - Measured code size result of these two Git revisions must be available.
+        - The result is directed into either file / stdout depending on
+          the option, size_common_info.result_options.stdout. (Default: file)
+        """
 
-        return 0
+        self.logger.info("Start to generate comparision result between "\
+                         "{} and {}."
+                         .format(self.old_size_dist_info.git_rev,
+                                 self.new_size_dist_info.git_rev))
+        if self.result_options.stdout:
+            output = sys.stdout
+        else:
+            output_file = os.path.join(
+                self.comp_dir,
+                '{}-{}-{}.{}'
+                .format(self.old_size_dist_info.get_info_indication(),
+                        self.new_size_dist_info.get_info_indication(),
+                        self.size_common_info.get_info_indication(),
+                        'md' if self.result_options.with_markdown else 'csv'))
+            output = open(output_file, "w")
 
-    def get_comparision_results(self) -> int:
-        """Compare size of library/*.o between self.old_rev and self.new_rev,
-        and generate the result file."""
+        self.logger.debug("Generating comparison results between {} and {}."
+                          .format(self.old_size_dist_info.git_rev,
+                                  self.new_size_dist_info.git_rev))
+        if self.result_options.with_markdown or self.result_options.stdout:
+            print("Measure code size between {} and {} by `{}`."
+                  .format(self.old_size_dist_info.get_info_indication(),
+                          self.new_size_dist_info.get_info_indication(),
+                          self.size_common_info.get_info_indication()),
+                  file=output)
+        self.code_size_generator.write_comparison(
+            self.old_size_dist_info.git_rev,
+            self.new_size_dist_info.git_rev,
+            output, self.result_options.with_markdown,
+            self.result_options.show_all)
+
+    def get_comparision_results(self) -> None:
+        """Compare size of library/*.o between self.old_size_dist_info and
+        self.old_size_dist_info and generate the result file."""
         build_tree.check_repo_path()
-        self._get_code_size_for_rev(self.old_rev)
-        self._get_code_size_for_rev(self.new_rev)
-        return self._gen_code_size_comparison()
-
-    def _handle_called_process_error(self, e: subprocess.CalledProcessError,
-                                     git_worktree_path: str) -> None:
-        """Handle a CalledProcessError and quit the program gracefully.
-        Remove any extra worktrees so that the script may be called again."""
-
-        # Tell the user what went wrong
-        print("The following command: {} failed and exited with code {}"
-              .format(e.cmd, e.returncode))
-        print("Process output:\n {}".format(str(e.output, "utf-8")))
-
-        # Quit gracefully by removing the existing worktree
-        self._remove_worktree(git_worktree_path)
-        sys.exit(-1)
+        self.gen_code_size_report(self.old_size_dist_info)
+        self.gen_code_size_report(self.new_size_dist_info)
+        self.gen_code_size_comparison()
 
 def main():
     parser = argparse.ArgumentParser(description=(__doc__))
@@ -412,55 +873,92 @@
         'required arguments',
         'required arguments to parse for running ' + os.path.basename(__file__))
     group_required.add_argument(
-        "-o", "--old-rev", type=str, required=True,
-        help="old revision for comparison.")
+        '-o', '--old-rev', type=str, required=True,
+        help='old Git revision for comparison.')
 
     group_optional = parser.add_argument_group(
         'optional arguments',
         'optional arguments to parse for running ' + os.path.basename(__file__))
     group_optional.add_argument(
-        "-r", "--result-dir", type=str, default="comparison",
-        help="directory where comparison result is stored, \
-              default is comparison")
+        '--record-dir', type=str, default='code_size_records',
+        help='directory where code size record is stored. '
+             '(Default: code_size_records)')
     group_optional.add_argument(
-        "-n", "--new-rev", type=str, default=None,
-        help="new revision for comparison, default is the current work \
-              directory, including uncommitted changes.")
+        '--comp-dir', type=str, default='comparison',
+        help='directory where comparison result is stored. '
+             '(Default: comparison)')
     group_optional.add_argument(
-        "-a", "--arch", type=str, default=detect_arch(),
+        '-n', '--new-rev', type=str, default='current',
+        help='new Git revision as comparison base. '
+             '(Default is the current work directory, including uncommitted '
+             'changes.)')
+    group_optional.add_argument(
+        '-a', '--arch', type=str, default=detect_arch(),
         choices=list(map(lambda s: s.value, SupportedArch)),
-        help="specify architecture for code size comparison, default is the\
-              host architecture.")
+        help='Specify architecture for code size comparison. '
+             '(Default is the host architecture.)')
     group_optional.add_argument(
-        "-c", "--config", type=str, default=SupportedConfig.DEFAULT.value,
+        '-c', '--config', type=str, default=SupportedConfig.DEFAULT.value,
         choices=list(map(lambda s: s.value, SupportedConfig)),
-        help="specify configuration type for code size comparison,\
-              default is the current MbedTLS configuration.")
+        help='Specify configuration type for code size comparison. '
+             '(Default is the current MbedTLS configuration.)')
+    group_optional.add_argument(
+        '--markdown', action='store_true', dest='markdown',
+        help='Show comparision of code size in a markdown table. '
+             '(Only show the files that have changed).')
+    group_optional.add_argument(
+        '--stdout', action='store_true', dest='stdout',
+        help='Set this option to direct comparison result into sys.stdout. '
+             '(Default: file)')
+    group_optional.add_argument(
+        '--show-all', action='store_true', dest='show_all',
+        help='Show all the objects in comparison result, including the ones '
+             'that haven\'t changed in code size. (Default: False)')
+    group_optional.add_argument(
+        '--verbose', action='store_true', dest='verbose',
+        help='Show logs in detail for code size measurement. '
+             '(Default: False)')
     comp_args = parser.parse_args()
 
-    if os.path.isfile(comp_args.result_dir):
-        print("Error: {} is not a directory".format(comp_args.result_dir))
-        parser.exit()
+    logger = logging.getLogger()
+    logging_util.configure_logger(logger, split_level=logging.NOTSET)
+    logger.setLevel(logging.DEBUG if comp_args.verbose else logging.INFO)
 
-    validate_res = CodeSizeComparison.validate_revision(comp_args.old_rev)
-    old_revision = validate_res.decode().replace("\n", "")
+    if os.path.isfile(comp_args.record_dir):
+        logger.error("record directory: {} is not a directory"
+                     .format(comp_args.record_dir))
+        sys.exit(1)
+    if os.path.isfile(comp_args.comp_dir):
+        logger.error("comparison directory: {} is not a directory"
+                     .format(comp_args.comp_dir))
+        sys.exit(1)
 
-    if comp_args.new_rev is not None:
-        validate_res = CodeSizeComparison.validate_revision(comp_args.new_rev)
-        new_revision = validate_res.decode().replace("\n", "")
-    else:
-        new_revision = "current"
+    comp_args.old_rev = CodeSizeCalculator.validate_git_revision(
+        comp_args.old_rev)
+    if comp_args.new_rev != 'current':
+        comp_args.new_rev = CodeSizeCalculator.validate_git_revision(
+            comp_args.new_rev)
 
-    code_size_info = CodeSizeInfo(comp_args.arch, comp_args.config,
-                                  detect_arch())
-    print("Measure code size for architecture: {}, configuration: {}\n"
-          .format(code_size_info.arch, code_size_info.config))
-    result_dir = comp_args.result_dir
-    size_compare = CodeSizeComparison(old_revision, new_revision, result_dir,
-                                      code_size_info)
-    return_code = size_compare.get_comparision_results()
-    sys.exit(return_code)
+    # version, git_rev, arch, config, compiler, opt_level
+    old_size_dist_info = CodeSizeDistinctInfo(
+        'old', comp_args.old_rev, comp_args.arch, comp_args.config, 'cc', '-Os')
+    new_size_dist_info = CodeSizeDistinctInfo(
+        'new', comp_args.new_rev, comp_args.arch, comp_args.config, 'cc', '-Os')
+    # host_arch, measure_cmd
+    size_common_info = CodeSizeCommonInfo(
+        detect_arch(), 'size -t')
+    # record_dir, comp_dir, with_markdown, stdout, show_all
+    result_options = CodeSizeResultInfo(
+        comp_args.record_dir, comp_args.comp_dir,
+        comp_args.markdown, comp_args.stdout, comp_args.show_all)
 
+    logger.info("Measure code size between {} and {} by `{}`."
+                .format(old_size_dist_info.get_info_indication(),
+                        new_size_dist_info.get_info_indication(),
+                        size_common_info.get_info_indication()))
+    CodeSizeComparison(old_size_dist_info, new_size_dist_info,
+                       size_common_info, result_options,
+                       logger).get_comparision_results()
 
 if __name__ == "__main__":
     main()
diff --git a/scripts/mbedtls_dev/crypto_data_tests.py b/scripts/mbedtls_dev/crypto_data_tests.py
new file mode 100644
index 0000000..7593952
--- /dev/null
+++ b/scripts/mbedtls_dev/crypto_data_tests.py
@@ -0,0 +1,123 @@
+"""Generate test data for cryptographic mechanisms.
+
+This module is a work in progress, only implementing a few cases for now.
+"""
+
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import hashlib
+from typing import Callable, Dict, Iterator, List, Optional #pylint: disable=unused-import
+
+from . import crypto_knowledge
+from . import psa_information
+from . import test_case
+
+
+def psa_low_level_dependencies(*expressions: str) -> List[str]:
+    """Infer dependencies of a PSA low-level test case by looking for PSA_xxx symbols.
+
+    This function generates MBEDTLS_PSA_BUILTIN_xxx symbols.
+    """
+    high_level = psa_information.automatic_dependencies(*expressions)
+    for dep in high_level:
+        assert dep.startswith('PSA_WANT_')
+    return ['MBEDTLS_PSA_BUILTIN_' + dep[9:] for dep in high_level]
+
+
+class HashPSALowLevel:
+    """Generate test cases for the PSA low-level hash interface."""
+
+    def __init__(self, info: psa_information.Information) -> None:
+        self.info = info
+        base_algorithms = sorted(info.constructors.algorithms)
+        all_algorithms = \
+            [crypto_knowledge.Algorithm(expr)
+             for expr in info.constructors.generate_expressions(base_algorithms)]
+        self.algorithms = \
+            [alg
+             for alg in all_algorithms
+             if (not alg.is_wildcard and
+                 alg.can_do(crypto_knowledge.AlgorithmCategory.HASH))]
+
+    # CALCULATE[alg] = function to return the hash of its argument in hex
+    # TO-DO: implement the None entries with a third-party library, because
+    # hashlib might not have everything, depending on the Python version and
+    # the underlying OpenSSL. On Ubuntu 16.04, truncated sha512 and sha3/shake
+    # are not available. On Ubuntu 22.04, md2, md4 and ripemd160 are not
+    # available.
+    CALCULATE = {
+        'PSA_ALG_MD5': lambda data: hashlib.md5(data).hexdigest(),
+        'PSA_ALG_RIPEMD160': None, #lambda data: hashlib.new('ripdemd160').hexdigest()
+        'PSA_ALG_SHA_1': lambda data: hashlib.sha1(data).hexdigest(),
+        'PSA_ALG_SHA_224': lambda data: hashlib.sha224(data).hexdigest(),
+        'PSA_ALG_SHA_256': lambda data: hashlib.sha256(data).hexdigest(),
+        'PSA_ALG_SHA_384': lambda data: hashlib.sha384(data).hexdigest(),
+        'PSA_ALG_SHA_512': lambda data: hashlib.sha512(data).hexdigest(),
+        'PSA_ALG_SHA_512_224': None, #lambda data: hashlib.new('sha512_224').hexdigest()
+        'PSA_ALG_SHA_512_256': None, #lambda data: hashlib.new('sha512_256').hexdigest()
+        'PSA_ALG_SHA3_224': None, #lambda data: hashlib.sha3_224(data).hexdigest(),
+        'PSA_ALG_SHA3_256': None, #lambda data: hashlib.sha3_256(data).hexdigest(),
+        'PSA_ALG_SHA3_384': None, #lambda data: hashlib.sha3_384(data).hexdigest(),
+        'PSA_ALG_SHA3_512': None, #lambda data: hashlib.sha3_512(data).hexdigest(),
+        'PSA_ALG_SHAKE256_512': None, #lambda data: hashlib.shake_256(data).hexdigest(64),
+    } #type: Dict[str, Optional[Callable[[bytes], str]]]
+
+    @staticmethod
+    def one_test_case(alg: crypto_knowledge.Algorithm,
+                      function: str, note: str,
+                      arguments: List[str]) -> test_case.TestCase:
+        """Construct one test case involving a hash."""
+        tc = test_case.TestCase()
+        tc.set_description('{}{} {}'
+                           .format(function,
+                                   ' ' + note if note else '',
+                                   alg.short_expression()))
+        tc.set_dependencies(psa_low_level_dependencies(alg.expression))
+        tc.set_function(function)
+        tc.set_arguments([alg.expression] +
+                         ['"{}"'.format(arg) for arg in arguments])
+        return tc
+
+    def test_cases_for_hash(self,
+                            alg: crypto_knowledge.Algorithm
+                            ) -> Iterator[test_case.TestCase]:
+        """Enumerate all test cases for one hash algorithm."""
+        calc = self.CALCULATE[alg.expression]
+        if calc is None:
+            return # not implemented yet
+
+        short = b'abc'
+        hash_short = calc(short)
+        long = (b'Hello, world. Here are 16 unprintable bytes: ['
+                b'\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a'
+                b'\x80\x81\x82\x83\xfe\xff]. '
+                b' This message was brought to you by a natural intelligence. '
+                b' If you can read this, good luck with your debugging!')
+        hash_long = calc(long)
+
+        yield self.one_test_case(alg, 'hash_empty', '', [calc(b'')])
+        yield self.one_test_case(alg, 'hash_valid_one_shot', '',
+                                 [short.hex(), hash_short])
+        for n in [0, 1, 64, len(long) - 1, len(long)]:
+            yield self.one_test_case(alg, 'hash_valid_multipart',
+                                     '{} + {}'.format(n, len(long) - n),
+                                     [long[:n].hex(), calc(long[:n]),
+                                      long[n:].hex(), hash_long])
+
+    def all_test_cases(self) -> Iterator[test_case.TestCase]:
+        """Enumerate all test cases for all hash algorithms."""
+        for alg in self.algorithms:
+            yield from self.test_cases_for_hash(alg)
diff --git a/scripts/mbedtls_dev/logging_util.py b/scripts/mbedtls_dev/logging_util.py
new file mode 100644
index 0000000..db1ebfe
--- /dev/null
+++ b/scripts/mbedtls_dev/logging_util.py
@@ -0,0 +1,57 @@
+"""Auxiliary functions used for logging module.
+"""
+
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import logging
+import sys
+
+def configure_logger(
+        logger: logging.Logger,
+        log_format="[%(levelname)s]: %(message)s",
+        split_level=logging.WARNING
+    ) -> None:
+    """
+    Configure the logging.Logger instance so that:
+        - Format is set to any log_format.
+            Default: "[%(levelname)s]: %(message)s"
+        - loglevel >= split_level are printed to stderr.
+        - loglevel <  split_level are printed to stdout.
+            Default: logging.WARNING
+    """
+    class MaxLevelFilter(logging.Filter):
+        # pylint: disable=too-few-public-methods
+        def __init__(self, max_level, name=''):
+            super().__init__(name)
+            self.max_level = max_level
+
+        def filter(self, record: logging.LogRecord) -> bool:
+            return record.levelno <= self.max_level
+
+    log_formatter = logging.Formatter(log_format)
+
+    # set loglevel >= split_level to be printed to stderr
+    stderr_hdlr = logging.StreamHandler(sys.stderr)
+    stderr_hdlr.setLevel(split_level)
+    stderr_hdlr.setFormatter(log_formatter)
+
+    # set loglevel < split_level to be printed to stdout
+    stdout_hdlr = logging.StreamHandler(sys.stdout)
+    stdout_hdlr.addFilter(MaxLevelFilter(split_level - 1))
+    stdout_hdlr.setFormatter(log_formatter)
+
+    logger.addHandler(stderr_hdlr)
+    logger.addHandler(stdout_hdlr)
diff --git a/scripts/mbedtls_dev/psa_information.py b/scripts/mbedtls_dev/psa_information.py
new file mode 100644
index 0000000..a82df41
--- /dev/null
+++ b/scripts/mbedtls_dev/psa_information.py
@@ -0,0 +1,162 @@
+"""Collect information about PSA cryptographic mechanisms.
+"""
+
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import re
+from typing import Dict, FrozenSet, List, Optional
+
+from . import macro_collector
+
+
+class Information:
+    """Gather information about PSA constructors."""
+
+    def __init__(self) -> None:
+        self.constructors = self.read_psa_interface()
+
+    @staticmethod
+    def remove_unwanted_macros(
+            constructors: macro_collector.PSAMacroEnumerator
+    ) -> None:
+        # Mbed TLS does not support finite-field DSA.
+        # Don't attempt to generate any related test case.
+        constructors.key_types.discard('PSA_KEY_TYPE_DSA_KEY_PAIR')
+        constructors.key_types.discard('PSA_KEY_TYPE_DSA_PUBLIC_KEY')
+
+    def read_psa_interface(self) -> macro_collector.PSAMacroEnumerator:
+        """Return the list of known key types, algorithms, etc."""
+        constructors = macro_collector.InputsForTest()
+        header_file_names = ['include/psa/crypto_values.h',
+                             'include/psa/crypto_extra.h']
+        test_suites = ['tests/suites/test_suite_psa_crypto_metadata.data']
+        for header_file_name in header_file_names:
+            constructors.parse_header(header_file_name)
+        for test_cases in test_suites:
+            constructors.parse_test_cases(test_cases)
+        self.remove_unwanted_macros(constructors)
+        constructors.gather_arguments()
+        return constructors
+
+
+def psa_want_symbol(name: str) -> str:
+    """Return the PSA_WANT_xxx symbol associated with a PSA crypto feature."""
+    if name.startswith('PSA_'):
+        return name[:4] + 'WANT_' + name[4:]
+    else:
+        raise ValueError('Unable to determine the PSA_WANT_ symbol for ' + name)
+
+def finish_family_dependency(dep: str, bits: int) -> str:
+    """Finish dep if it's a family dependency symbol prefix.
+
+    A family dependency symbol prefix is a PSA_WANT_ symbol that needs to be
+    qualified by the key size. If dep is such a symbol, finish it by adjusting
+    the prefix and appending the key size. Other symbols are left unchanged.
+    """
+    return re.sub(r'_FAMILY_(.*)', r'_\1_' + str(bits), dep)
+
+def finish_family_dependencies(dependencies: List[str], bits: int) -> List[str]:
+    """Finish any family dependency symbol prefixes.
+
+    Apply `finish_family_dependency` to each element of `dependencies`.
+    """
+    return [finish_family_dependency(dep, bits) for dep in dependencies]
+
+SYMBOLS_WITHOUT_DEPENDENCY = frozenset([
+    'PSA_ALG_AEAD_WITH_AT_LEAST_THIS_LENGTH_TAG', # modifier, only in policies
+    'PSA_ALG_AEAD_WITH_SHORTENED_TAG', # modifier
+    'PSA_ALG_ANY_HASH', # only in policies
+    'PSA_ALG_AT_LEAST_THIS_LENGTH_MAC', # modifier, only in policies
+    'PSA_ALG_KEY_AGREEMENT', # chaining
+    'PSA_ALG_TRUNCATED_MAC', # modifier
+])
+def automatic_dependencies(*expressions: str) -> List[str]:
+    """Infer dependencies of a test case by looking for PSA_xxx symbols.
+
+    The arguments are strings which should be C expressions. Do not use
+    string literals or comments as this function is not smart enough to
+    skip them.
+    """
+    used = set()
+    for expr in expressions:
+        used.update(re.findall(r'PSA_(?:ALG|ECC_FAMILY|KEY_TYPE)_\w+', expr))
+    used.difference_update(SYMBOLS_WITHOUT_DEPENDENCY)
+    return sorted(psa_want_symbol(name) for name in used)
+
+# Define set of regular expressions and dependencies to optionally append
+# extra dependencies for test case.
+AES_128BIT_ONLY_DEP_REGEX = r'AES\s(192|256)'
+AES_128BIT_ONLY_DEP = ["!MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH"]
+
+DEPENDENCY_FROM_KEY = {
+    AES_128BIT_ONLY_DEP_REGEX: AES_128BIT_ONLY_DEP
+}#type: Dict[str, List[str]]
+def generate_key_dependencies(description: str) -> List[str]:
+    """Return additional dependencies based on pairs of REGEX and dependencies.
+    """
+    deps = []
+    for regex, dep in DEPENDENCY_FROM_KEY.items():
+        if re.search(regex, description):
+            deps += dep
+
+    return deps
+
+# A temporary hack: at the time of writing, not all dependency symbols
+# are implemented yet. Skip test cases for which the dependency symbols are
+# not available. Once all dependency symbols are available, this hack must
+# be removed so that a bug in the dependency symbols properly leads to a test
+# failure.
+def read_implemented_dependencies(filename: str) -> FrozenSet[str]:
+    return frozenset(symbol
+                     for line in open(filename)
+                     for symbol in re.findall(r'\bPSA_WANT_\w+\b', line))
+_implemented_dependencies = None #type: Optional[FrozenSet[str]] #pylint: disable=invalid-name
+def hack_dependencies_not_implemented(dependencies: List[str]) -> None:
+    global _implemented_dependencies #pylint: disable=global-statement,invalid-name
+    if _implemented_dependencies is None:
+        _implemented_dependencies = \
+            read_implemented_dependencies('include/psa/crypto_config.h')
+    if not all((dep.lstrip('!') in _implemented_dependencies or
+                not dep.lstrip('!').startswith('PSA_WANT'))
+               for dep in dependencies):
+        dependencies.append('DEPENDENCY_NOT_IMPLEMENTED_YET')
+
+def tweak_key_pair_dependency(dep: str, usage: str):
+    """
+    This helper function add the proper suffix to PSA_WANT_KEY_TYPE_xxx_KEY_PAIR
+    symbols according to the required usage.
+    """
+    ret_list = list()
+    if dep.endswith('KEY_PAIR'):
+        if usage == "BASIC":
+            # BASIC automatically includes IMPORT and EXPORT for test purposes (see
+            # config_psa.h).
+            ret_list.append(re.sub(r'KEY_PAIR', r'KEY_PAIR_BASIC', dep))
+            ret_list.append(re.sub(r'KEY_PAIR', r'KEY_PAIR_IMPORT', dep))
+            ret_list.append(re.sub(r'KEY_PAIR', r'KEY_PAIR_EXPORT', dep))
+        elif usage == "GENERATE":
+            ret_list.append(re.sub(r'KEY_PAIR', r'KEY_PAIR_GENERATE', dep))
+    else:
+        # No replacement to do in this case
+        ret_list.append(dep)
+    return ret_list
+
+def fix_key_pair_dependencies(dep_list: List[str], usage: str):
+    new_list = [new_deps
+                for dep in dep_list
+                for new_deps in tweak_key_pair_dependency(dep, usage)]
+
+    return new_list
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 9bd93f1..0869aaa 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -118,8 +118,10 @@
             --directory ${CMAKE_CURRENT_BINARY_DIR}/suites
         DEPENDS
             ${CMAKE_CURRENT_SOURCE_DIR}/../tests/scripts/generate_psa_tests.py
+            ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/mbedtls_dev/crypto_data_tests.py
             ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/mbedtls_dev/crypto_knowledge.py
             ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/mbedtls_dev/macro_collector.py
+            ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/mbedtls_dev/psa_information.py
             ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/mbedtls_dev/psa_storage.py
             ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/mbedtls_dev/test_case.py
             ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/mbedtls_dev/test_data_generation.py
diff --git a/tests/Makefile b/tests/Makefile
index 75dc3c6..ec016d8 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -121,8 +121,10 @@
 
 $(GENERATED_PSA_DATA_FILES): generated_psa_test_data
 generated_psa_test_data: scripts/generate_psa_tests.py
+generated_psa_test_data: ../scripts/mbedtls_dev/crypto_data_tests.py
 generated_psa_test_data: ../scripts/mbedtls_dev/crypto_knowledge.py
 generated_psa_test_data: ../scripts/mbedtls_dev/macro_collector.py
+generated_psa_test_data: ../scripts/mbedtls_dev/psa_information.py
 generated_psa_test_data: ../scripts/mbedtls_dev/psa_storage.py
 generated_psa_test_data: ../scripts/mbedtls_dev/test_case.py
 generated_psa_test_data: ../scripts/mbedtls_dev/test_data_generation.py
diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index 37a3405..b5f0844 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -60,6 +60,14 @@
 	$(OPENSSL) pkey -in $< -out $@ -inform PEM -outform DER -passin "pass:$(test_ca_pwd_rsa)"
 all_final += test-ca.key.der
 
+# This is only used for generating cert_example_multi_nocn.crt
+test-ca_nocn.crt: $(test_ca_key_file_rsa)
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 selfsign=1 \
+		subject_key=$(test_ca_key_file_rsa) subject_pwd=$(test_ca_pwd_rsa)  subject_name="C=NL" \
+		issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) issuer_name="C=NL" \
+		not_before=20190210144400 not_after=20290210144400 md=SHA1 version=3 output_file=$@
+all_intermediate += test-ca_nocn.crt
+
 test-ca-sha1.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
 	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144400 not_after=20290210144400 md=SHA1 version=3 output_file=$@
 all_final += test-ca-sha1.crt
@@ -99,6 +107,16 @@
 		-passin "pass:$(test_ca_pwd_rsa)" -set_serial 17 -days 3653 -sha256 \
 		-in $< > $@
 
+cert_example_multi_nocn.csr: rsa_pkcs1_1024_clear.pem
+	$(MBEDTLS_CERT_REQ) filename=$< output_file=$@ subject_name='C=NL'
+all_intermediate += cert_example_multi_nocn.csr
+
+parse_input/cert_example_multi_nocn.crt cert_example_multi_nocn.crt: cert_example_multi_nocn.csr test-ca_nocn.crt
+	$(OPENSSL) x509 -req -CA test-ca_nocn.crt -CAkey $(test_ca_key_file_rsa) \
+		-extfile $(test_ca_config_file) -extensions ext_multi_nocn -passin "pass:$(test_ca_pwd_rsa)" \
+		-set_serial  0xf7c67ff8e9a963f9 -days 3653 -sha1 -in $< > $@
+all_final += cert_example_multi_nocn.crt
+
 parse_input/test_csr_v3_keyUsage.csr.der: rsa_pkcs1_1024_clear.pem
 	$(OPENSSL) req -new -subj '/CN=etcd' -config $(test_ca_config_file) -key rsa_pkcs1_1024_clear.pem -outform DER -out $@ -reqexts csr_ext_v3_keyUsage
 parse_input/test_csr_v3_subjectAltName.csr.der: rsa_pkcs1_1024_clear.pem
@@ -168,13 +186,28 @@
 test_ca_key_file_ec = test-ca2.key
 
 test-ca2.req.sha256: $(test_ca_key_file_ec)
-	$(MBEDTLS_CERT_REQ) output_file=$@ filename=$(test_ca_key_file_ec) subject_name="C=NL,O=PolarSSL,CN=Polarssl Test EC CA" md=SHA256
+	$(MBEDTLS_CERT_REQ) output_file=$@ filename=$(test_ca_key_file_ec) \
+	subject_name="C=NL,O=PolarSSL,CN=Polarssl Test EC CA" md=SHA256
 all_intermediate += test-ca2.req.sha256
 
 test-ca2.crt: $(test_ca_key_file_ec) test-ca2.req.sha256
-	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=13926223505202072808 request_file=test-ca2.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=Polarssl Test EC CA" issuer_key=$(test_ca_key_file_ec) not_before=20190210144400 not_after=20290210144400 md=SHA256 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=13926223505202072808 selfsign=1 \
+		request_file=test-ca2.req.sha256 \
+		issuer_name="C=NL,O=PolarSSL,CN=Polarssl Test EC CA" \
+		issuer_key=$(test_ca_key_file_ec) \
+		not_before=20190210144400 not_after=20290210144400 \
+		md=SHA256 version=3 output_file=$@
 all_final += test-ca2.crt
 
+test-ca2.ku-%.crt: test-ca2.ku-%.crt.openssl.v3_ext $(test_ca_key_file_ec) test-ca2.req.sha256
+	$(OPENSSL) x509 -req -in test-ca2.req.sha256 -extfile $< \
+		-signkey $(test_ca_key_file_ec) -days 3653 -out $@
+
+all_final += test-ca2.ku-crl.crt \
+			 test-ca2.ku-crt.crt \
+			 test-ca2.ku-crt_crl.crt \
+			 test-ca2.ku-ds.crt
+
 test-ca2-future.crt: $(test_ca_key_file_ec) test-ca2.req.sha256
 	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=13926223505202072808 request_file=test-ca2.req.sha256 selfsign=1 \
 		issuer_name="C=NL,O=PolarSSL,CN=Polarssl Test EC CA" issuer_key=$(test_ca_key_file_ec) \
@@ -199,10 +232,14 @@
 all_final += $(test_ca_ec_cat)
 
 parse_input/test-ca-any_policy.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
-	$(OPENSSL) req -x509 -config $(test_ca_config_file) -extensions v3_any_policy_ca -key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 0 -days 3653 -sha256 -in test-ca.req.sha256 -out $@
+	$(OPENSSL) req -x509 -config $(test_ca_config_file) -extensions v3_any_policy_ca \
+		-key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" \
+		-set_serial 0 -days 3653 -sha256 -in test-ca.req.sha256 -out $@
 
 parse_input/test-ca-any_policy_ec.crt: $(test_ca_key_file_ec) test-ca.req_ec.sha256
-	$(OPENSSL) req -x509 -config $(test_ca_config_file) -extensions v3_any_policy_ca -key $(test_ca_key_file_ec) -set_serial 0 -days 3653 -sha256 -in test-ca.req_ec.sha256 -out $@
+	$(OPENSSL) req -x509 -config $(test_ca_config_file) -extensions v3_any_policy_ca \
+		-key $(test_ca_key_file_ec) -set_serial 0 -days 3653 -sha256 \
+		-in test-ca.req_ec.sha256 -out $@
 
 parse_input/test-ca-any_policy_with_qualifier.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
 	$(OPENSSL) req -x509 -config $(test_ca_config_file) -extensions v3_any_policy_qualifier_ca -key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 0 -days 3653 -sha256 -in test-ca.req.sha256 -out $@
@@ -414,9 +451,23 @@
 
 # try to forge a copy of test-int-ca3 with different key
 server5-ss-forgeca.crt: server5.key
-	$(FAKETIME) '2015-09-01 14:08:43' $(OPENSSL) req -x509 -new -subj "/C=UK/O=mbed TLS/CN=mbed TLS Test intermediate CA 3" -set_serial 77 -config $(test_ca_config_file) -extensions noext_ca -days 3650 -sha256 -key $< -out $@
+	$(OPENSSL) req -x509 -new -subj "/C=UK/O=mbed TLS/CN=mbed TLS Test intermediate CA 3" \
+		-set_serial 77 -config $(test_ca_config_file) -extensions noext_ca \
+		-days 3650 -sha256 -key $< -out $@
 all_final += server5-ss-forgeca.crt
 
+server5-selfsigned.crt: server5.key
+	openssl req -x509 -key server5.key \
+        -sha256 -days 3650 -nodes \
+        -addext basicConstraints=critical,CA:FALSE \
+        -addext keyUsage=critical,digitalSignature \
+        -addext subjectKeyIdentifier=hash   \
+        -addext authorityKeyIdentifier=none \
+        -set_serial 0x53a2cb4b124ead837da894b2 \
+        -subj "/CN=selfsigned/OU=testing/O=PolarSSL/C=NL" \
+        -out $@
+all_final += server5-selfsigned.crt
+
 parse_input/server5-othername.crt.der: server5.key
 	$(OPENSSL) req -x509 -new -subj "/C=UK/O=Mbed TLS/CN=Mbed TLS othername SAN" -set_serial 77 -config $(test_ca_config_file) -extensions othername_san -days 3650 -sha256 -key $< -outform der -out $@
 
@@ -486,6 +537,59 @@
 	{ head -n-2 $<; tail -n-2 $< | sed -e '1s/0\(=*\)$$/_\1/' -e '1s/[^_=]\(=*\)$$/0\1/' -e '1s/_/1/'; } > $@
 all_final += test-int-ca3-badsign.crt
 
+# server9*
+
+server9.csr: server9.key
+	$(OPENSSL) req -new -subj "/C=NL/O=PolarSSL/CN=localhost" \
+					-key $< -out $@
+parse_input/server9.crt server9.crt: server9-sha1.crt
+	cp $< $@
+all_final += server9.crt
+all_intermediate += server9.csr server9-sha1.crt
+
+server9-%.crt: server9.csr $(test_ca_crt) $(test_ca_key_file_rsa)
+	$(OPENSSL) x509 -req -extfile $(cli_crt_extensions_file) -extensions cli-rsa \
+		-passin "pass:$(test_ca_pwd_rsa)" -CA $(test_ca_crt) -CAkey $(test_ca_key_file_rsa) \
+		-set_serial $(SERVER9_CRT_SERIAL) -days 3653 \
+		-sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:max \
+		-sigopt rsa_mgf1_md:$(@F:server9-%.crt=%) -$(@F:server9-%.crt=%) \
+		-in $< -out $@
+server9-sha1.crt: SERVER9_CRT_SERIAL=22
+parse_input/server9-sha224.crt server9-sha224.crt: SERVER9_CRT_SERIAL=23
+parse_input/server9-sha256.crt server9-sha256.crt: SERVER9_CRT_SERIAL=24
+parse_input/server9-sha384.crt server9-sha384.crt: SERVER9_CRT_SERIAL=25
+parse_input/server9-sha512.crt server9-sha512.crt: SERVER9_CRT_SERIAL=26
+all_final += server9-sha224.crt server9-sha256.crt server9-sha384.crt server9-sha512.crt
+
+server9-defaults.crt: server9.csr $(test_ca_crt) $(test_ca_key_file_rsa)
+	$(OPENSSL) x509 -req -extfile $(cli_crt_extensions_file) -extensions cli-rsa \
+		-passin "pass:$(test_ca_pwd_rsa)" -CA $(test_ca_crt) -CAkey $(test_ca_key_file_rsa) \
+		-set_serial 72 -days 3653 \
+		-sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:max -sha1 \
+		-in $< -out $@
+all_final += server9-defaults.crt
+
+server9-badsign.crt: server9.crt
+	{ head -n-2 $<; tail -n-2 $< | sed -e '1s/0\(=*\)$$/_\1/' -e '1s/[^_=]\(=*\)$$/0\1/' -e '1s/_/1/'; } > $@
+all_final += server9-badsign.crt
+
+server9-with-ca.crt: server9.crt $(test_ca_crt)
+	cat $^ > $@
+all_final += server9-with-ca.crt
+
+# FIXME: This file needs special sequence. It should be update manually
+server9-bad-saltlen.crt: server9.csr $(test_ca_crt) $(test_ca_key_file_rsa)
+	false
+
+server9-bad-mgfhash.crt: server9.csr $(test_ca_crt) $(test_ca_key_file_rsa)
+	$(OPENSSL) x509 -req -extfile $(cli_crt_extensions_file) -extensions cli-rsa \
+		-passin "pass:$(test_ca_pwd_rsa)" -CA $(test_ca_crt) -CAkey $(test_ca_key_file_rsa) \
+		-set_serial 24 -days 3653 \
+		-sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:max \
+		-sigopt rsa_mgf1_md:sha224 -sha256 \
+		-in $< -out $@
+all_final += server9-bad-mgfhash.crt
+
 # server10*
 
 server10.crt: server10.key test-int-ca3.crt test-int-ca3.key
@@ -1387,6 +1491,32 @@
 	$(OPENSSL) req -key $< -out $@ -new -nodes -subj "/C=NL/O=PolarSSL/CN=PolarSSL Server 1" -sha1 -addext keyUsage=digitalSignature,nonRepudiation
 all_final += server5.req.ku.sha1
 
+server5.ku-ds.crt: SERVER5_CRT_SERIAL=45
+server5.ku-ds.crt: SERVER5_KEY_USAGE=digital_signature
+server5.ku-ka.crt: SERVER5_CRT_SERIAL=46
+server5.ku-ka.crt: SERVER5_KEY_USAGE=key_agreement
+server5.ku-ke.crt: SERVER5_CRT_SERIAL=47
+server5.ku-ke.crt: SERVER5_KEY_USAGE=key_encipherment
+server5.eku-cs.crt: SERVER5_CRT_SERIAL=58
+server5.eku-cs.crt: SERVER5_EXT_KEY_USAGE=codeSigning
+server5.eku-cs_any.crt: SERVER5_CRT_SERIAL=59
+server5.eku-cs_any.crt: SERVER5_EXT_KEY_USAGE=codeSigning,any
+server5.eku-cli.crt: SERVER5_CRT_SERIAL=60
+server5.eku-cli.crt: SERVER5_EXT_KEY_USAGE=clientAuth
+server5.eku-srv_cli.crt: SERVER5_CRT_SERIAL=61
+server5.eku-srv_cli.crt: SERVER5_EXT_KEY_USAGE=serverAuth,clientAuth
+server5.eku-srv.crt: SERVER5_CRT_SERIAL=62
+server5.eku-srv.crt: SERVER5_EXT_KEY_USAGE=serverAuth
+server5.ku-%.crt: SERVER5_EXT_OPTS=key_usage=$(SERVER5_KEY_USAGE)
+server5.eku-%.crt: SERVER5_EXT_OPTS=ext_key_usage=$(SERVER5_EXT_KEY_USAGE)
+server5.%.crt: server5.key
+	$(MBEDTLS_CERT_WRITE) \
+		subject_key=$< subject_name="C=NL,O=PolarSSL,CN=localhost" serial=$(SERVER5_CRT_SERIAL) \
+		issuer_crt=$(test_ca_crt_file_ec) issuer_key=$(test_ca_key_file_ec) $(SERVER5_EXT_OPTS) \
+		not_before=20190210144406 not_after=20290210144406 md=SHA256 version=3 output_file=$@
+all_final += server5.ku-ka.crt server5.ku-ke.crt server5.ku-ds.crt
+all_final += server5.eku-cs.crt server5.eku-cs_any.crt server5.eku-cli.crt server5.eku-srv_cli.crt server5.eku-srv.crt
+
 # server6*
 
 server6.csr: server6.key
@@ -1398,6 +1528,18 @@
 				-extfile server5.crt.openssl.v3_ext -set_serial 10 -days 3650 -sha256 -in $< -out $@
 all_final += server6.crt
 
+server6-ss-child.csr : server6.key
+	$(OPENSSL) req -new -subj "/CN=selfsigned-child/OU=testing/O=PolarSSL/C=NL" \
+		-key $< -out $@
+all_intermediate += server6-ss-child.csr
+server6-ss-child.crt: server6-ss-child.csr server5-selfsigned.crt server5.key server6-ss-child.crt.openssl.v3_ext
+	$(OPENSSL) x509 -req -CA server5-selfsigned.crt -CAkey server5.key \
+				-extfile server6-ss-child.crt.openssl.v3_ext \
+				-set_serial 0x53a2cb5822399474a7ec79ec \
+				-days 3650 -sha256 -in $< -out $@
+all_final += server6-ss-child.crt
+
+
 ################################################################
 ### Generate certificates for CRT write check tests
 ################################################################
@@ -1448,7 +1590,7 @@
 	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
 server1.commas.crt: server1.key parse_input/server1.req.commas.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
 	$(MBEDTLS_CERT_WRITE) request_file=parse_input/server1.req.commas.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
-all_final += server1.crt server1.noauthid.crt server1.crt.der server1.commas.crt
+all_final += server1.crt server1.noauthid.crt parse_input/server1.crt.der server1.commas.crt
 
 parse_input/server1.key_usage.crt: parse_input/server1.req.sha256
 server1.key_usage.crt: server1.req.sha256
@@ -1486,6 +1628,16 @@
 	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
 all_final += server1.ca.crt server1.ca_noauthid.crt server1.ca.der
 
+server1-nospace.crt: server1.key test-ca.crt
+	$(MBEDTLS_CERT_WRITE) subject_key=$< serial=31\
+		subject_name="C=NL,O=PolarSSL,CN=polarssl.example"  \
+		issuer_crt=test-ca.crt issuer_key=$(test_ca_key_file_rsa) \
+		issuer_pwd=$(test_ca_pwd_rsa) \
+		not_before=20190210144406 not_after=20290210144406 \
+		md=SHA256 version=3 authority_identifier=1 \
+		output_file=$@
+all_final += server1-nospace.crt
+
 server1_ca.crt: server1.crt $(test_ca_crt)
 	cat server1.crt $(test_ca_crt) > $@
 all_final += server1_ca.crt
@@ -1544,8 +1696,13 @@
 crl.pem: $(test_ca_crt) $(test_ca_key_file_rsa) $(test_ca_config_file)
 	$(OPENSSL) ca -gencrl -batch -cert $(test_ca_crt) -keyfile $(test_ca_key_file_rsa) -key $(test_ca_pwd_rsa) -config $(test_ca_server1_config_file) -md sha1 -crldays 3653 -out $@
 
-crl-futureRevocationDate.pem: $(test_ca_crt) $(test_ca_key_file_rsa) $(test_ca_config_file) test-ca.server1.future-crl.db  test-ca.server1.future-crl.opensslconf
-	$(FAKETIME) '2028-12-31' $(OPENSSL) ca -gencrl -config test-ca.server1.future-crl.opensslconf -crldays 365 -passin "pass:$(test_ca_pwd_rsa)" -out $@
+crl-futureRevocationDate.pem: $(test_ca_crt) $(test_ca_key_file_rsa) \
+							  $(test_ca_config_file) 				\
+							  test-ca.server1.future-crl.db  \
+							  test-ca.server1.future-crl.opensslconf
+	$(FAKETIME) -f '+10y' $(OPENSSL) ca -gencrl \
+		-config test-ca.server1.future-crl.opensslconf -crldays 365 \
+		-passin "pass:$(test_ca_pwd_rsa)" -out $@
 
 server1_all: crl.pem crl-futureRevocationDate.pem server1.crt server1.noauthid.crt server1.crt.openssl server1.v1.crt server1.v1.crt.openssl server1.key_usage.crt server1.key_usage_noauthid.crt server1.key_usage.crt.openssl server1.cert_type.crt server1.cert_type_noauthid.crt server1.cert_type.crt.openssl server1.der server1.der.openssl server1.v1.der server1.v1.der.openssl server1.key_usage.der server1.key_usage.der.openssl server1.cert_type.der server1.cert_type.der.openssl
 
@@ -1563,6 +1720,25 @@
 	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=2 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA256 version=3 output_file=$@
 all_final += server2-sha256.crt
 
+server2.ku-ka.crt: SERVER2_CRT_SERIAL=42
+server2.ku-ka.crt: SERVER2_KEY_USAGE=key_agreement
+server2.ku-ke.crt: SERVER2_CRT_SERIAL=43
+server2.ku-ke.crt: SERVER2_KEY_USAGE=key_encipherment
+server2.ku-ds.crt: SERVER2_CRT_SERIAL=44
+server2.ku-ds.crt: SERVER2_KEY_USAGE=digital_signature
+server2.ku-ds_ke.crt: SERVER2_CRT_SERIAL=48
+server2.ku-ds_ke.crt: SERVER2_KEY_USAGE=digital_signature,key_encipherment
+server2.ku-%.crt: server2.req.sha256
+	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=$(SERVER2_CRT_SERIAL) \
+		issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) \
+		key_usage="$(SERVER2_KEY_USAGE)" \
+		not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
+all_final += server2.ku-ka.crt server2.ku-ke.crt server2.ku-ds.crt server2.ku-ds_ke.crt
+
+server2-badsign.crt: server2.crt
+	{ head -n-2 $<; tail -n-2 $< | sed -e '1s/0\(=*\)$$/_\1/' -e '1s/[^_=]\(=*\)$$/0\1/' -e '1s/_/1/'; } > $@
+all_final += server2-badsign.crt
+
 # server3*
 
 parse_input/server3.crt server3.crt: server3.key
@@ -1819,6 +1995,41 @@
 	dd if=pkcs7_data_cert_signed_sha256.der of=$@ skip=19 bs=1
 all_final += pkcs7_data_cert_signeddata_sha256.der
 
+# - test-ca-v1.crt: v1 "CA", signs
+#     server1-v1.crt: v1 "intermediate CA", signs
+#         server2-v1*.crt: EE cert (without of with chain in same file)
+
+test-ca-v1.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial_hex=53a2b68e05400e555c9395e5 \
+		request_file=test-ca.req.sha256 \
+		selfsign=1 issuer_name="CN=PolarSSL Test CA v1,OU=testing,O=PolarSSL,C=NL" \
+		issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) \
+		not_before=20190210144400 not_after=20290210144400 md=SHA256 version=1 \
+		output_file=$@
+all_final += test-ca-v1.crt
+
+server1-v1.crt: server1.key test-ca-v1.crt
+	$(MBEDTLS_CERT_WRITE) subject_key=$< serial_hex=53a2b6c704cd4d8ebc800bc1\
+		subject_name="CN=server1/int-ca-v1,OU=testing,O=PolarSSL,C=NL"  \
+		issuer_crt=test-ca-v1.crt issuer_key=$(test_ca_key_file_rsa) \
+		issuer_pwd=$(test_ca_pwd_rsa) \
+		not_before=20190210144406 not_after=20290210144406 \
+		md=SHA256 version=1 \
+		output_file=$@
+all_final += server1-v1.crt
+
+server2-v1.crt: server2.key server1-v1.crt
+	$(MBEDTLS_CERT_WRITE) subject_key=$< serial_hex=53a2b6d9235dbc4573f9b76c\
+		subject_name="CN=server2,OU=testing,O=PolarSSL,C=NL"  \
+		issuer_crt=server1-v1.crt issuer_key=server1.key \
+		not_before=20190210144406 not_after=20290210144406 \
+		md=SHA256 version=1 \
+		output_file=$@
+all_final += server2-v1.crt
+
+server2-v1-chain.crt: server2-v1.crt server1-v1.crt
+	cat $^ > $@
+
 ################################################################
 #### Generate C format test certs header
 ################################################################
diff --git a/tests/data_files/cert_example_multi_nocn.crt b/tests/data_files/cert_example_multi_nocn.crt
index 1634846..08bf63c 100644
--- a/tests/data_files/cert_example_multi_nocn.crt
+++ b/tests/data_files/cert_example_multi_nocn.crt
@@ -1,13 +1,16 @@
 -----BEGIN CERTIFICATE-----
-MIIB/TCCAWagAwIBAgIJAPfGf/jpqWP5MA0GCSqGSIb3DQEBBQUAMA0xCzAJBgNV
-BAYTAk5MMB4XDTE0MDEyMjEwMDQzM1oXDTI0MDEyMjEwMDQzM1owDTELMAkGA1UE
-BhMCTkwwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAN0Rip+ZurBoyirqO2pt
-WZftTslU5A3uzqB9oB6q6A7CuxNA24oSjokTJKXF9frY9ZDXyMrLxf6THa/aEiNz
-UnlGGrqgVyt2FjGzqK/nOJsIi2OZOgol7kXSGFi6uZMa7dRYmmMbN/z3FAifhWVJ
-81kybdHg6G3eUu1mtKkL2kCVAgMBAAGjZTBjMAkGA1UdEwQCMAAwCwYDVR0PBAQD
+MIICfjCCAWagAwIBAgIJAPfGf/jpqWP5MA0GCSqGSIb3DQEBBQUAMA0xCzAJBgNV
+BAYTAk5MMB4XDTIzMDUxODAyMDUwMVoXDTMzMDUxODAyMDUwMVowDTELMAkGA1UE
+BhMCTkwwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMc4ksXD9HAQCGv4EzXs
+8wEciiUPlYI2HqoelhJVGqz4e3UzC3BXM5zZlfFNTEQ3yL7EoD/kZDzT88kCQz3D
+fFuOeaoJhK6CEzcKv4VpvSo1Ymyx/uSs4EKyQXx75J0nFJssB2uOQz0/bHY6Rpoc
+cA0lnbwIx0D82AI3Yv996/wtAgMBAAGjZTBjMAkGA1UdEwQCMAAwCwYDVR0PBAQD
 AgXgMEkGA1UdEQRCMECCHHd3dy5zaG90b2thbi1icmF1bnNjaHdlaWcuZGWCFHd3
-dy5tYXNzaW1vLWFiYXRlLmV1hwTAqAEBhwTAqEWQMA0GCSqGSIb3DQEBBQUAA4GB
-ABjx1ytrqCyFC5/0cjWnbLK9vsvLny2ZikDewfRxqJ5zAxGWLqHOr1SmUmu2DrvB
-bkT9g5z19+iMhPnzJz1x7Q2m7WTIJTuUPK+hKZJATDLNhZ86h5Nkw8k9YzKcOrPm
-EIqsy55CSgLU0ntljqSBvSb4ifrF1NnIWej2lSfN6r+3
+dy5tYXNzaW1vLWFiYXRlLmV1hwTAqAEBhwTAqEWQMA0GCSqGSIb3DQEBBQUAA4IB
+AQAuomKlMLwSkP3zvGuA9awDdITM/uCzfd77yi60zMNtFHDMu2YZ2npQSl0czab6
+/8fX9goaU8V3cx4KXSLMx7i9AsP1r559Uo3c/4oTZd3xBsElMAn/TXiuujZ2RwdL
+RcMOJerlThOE0dtNdniJj7lPaan70CELP/CUn8KgeWgztQJj4ghfUwnLn6RnpLfl
+YyM/Xq2YbwnQWHXSe3CPTy5RCWalt3SgZf6IDcD6CNq1Q2l14iR78OWnlxGTFmjP
+ez3OzxNT2BZz0AiP0WvTbUtvfuxw9G3fHHe5ClsAopIA3tD246jHOAlqAnOEBC/x
+IABbWjY/briP9U4R6x+mg2ck
 -----END CERTIFICATE-----
diff --git a/tests/data_files/crl-rsa-pss-sha1-badsign.pem b/tests/data_files/crl-rsa-pss-sha1-badsign.pem
index 7e2a596..d236910 100644
--- a/tests/data_files/crl-rsa-pss-sha1-badsign.pem
+++ b/tests/data_files/crl-rsa-pss-sha1-badsign.pem
@@ -1,14 +1,14 @@
 -----BEGIN X509 CRL-----
 MIICJDCCAQYCAQEwEwYJKoZIhvcNAQEKMAaiBAICAOowOzELMAkGA1UEBhMCTkwx
-ETAPBgNVBAoTCFBvbGFyU1NMMRkwFwYDVQQDExBQb2xhclNTTCBUZXN0IENBFw0x
-NDAxMjAxMzQ2MzVaFw0yNDAxMTgxMzQ2MzVaMCgwEgIBChcNMTMwOTI0MTYyODM4
-WjASAgEWFw0xNDAxMjAxMzQzMDVaoGcwZTBjBgNVHSMEXDBagBS0WuSls97SUva5
-1aaVD+s+vMf9/6E/pD0wOzELMAkGA1UEBhMCTkwxETAPBgNVBAoTCFBvbGFyU1NM
-MRkwFwYDVQQDExBQb2xhclNTTCBUZXN0IENBggEAMBMGCSqGSIb3DQEBCjAGogQC
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index 59ca4f7..c129c0c 100644
--- a/tests/data_files/crl-rsa-pss-sha1.pem
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diff --git a/tests/data_files/server1-nospace.crt b/tests/data_files/server1-nospace.crt
index 932c236..4c3cb90 100644
--- a/tests/data_files/server1-nospace.crt
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diff --git a/tests/data_files/server1-v1.crt b/tests/data_files/server1-v1.crt
index 47f1fff..8ca9007 100644
--- a/tests/data_files/server1-v1.crt
+++ b/tests/data_files/server1-v1.crt
@@ -1,19 +1,19 @@
 -----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/server2-v1-chain.crt b/tests/data_files/server2-v1-chain.crt
index 84bb6b2..8ac003b 100644
--- a/tests/data_files/server2-v1-chain.crt
+++ b/tests/data_files/server2-v1-chain.crt
@@ -1,38 +1,38 @@
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 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server2-v1.crt b/tests/data_files/server2-v1.crt
index 7ef7968..990cd4b 100644
--- a/tests/data_files/server2-v1.crt
+++ b/tests/data_files/server2-v1.crt
@@ -1,19 +1,19 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server2.ku-ds.crt b/tests/data_files/server2.ku-ds.crt
index 3bd07d0..d1e1251 100644
--- a/tests/data_files/server2.ku-ds.crt
+++ b/tests/data_files/server2.ku-ds.crt
@@ -1,21 +1,20 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server2.ku-ds_ke.crt b/tests/data_files/server2.ku-ds_ke.crt
index ebee7e1..eb23245 100644
--- a/tests/data_files/server2.ku-ds_ke.crt
+++ b/tests/data_files/server2.ku-ds_ke.crt
@@ -1,21 +1,20 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server2.ku-ka.crt b/tests/data_files/server2.ku-ka.crt
index 90f7c4a..ce97e82 100644
--- a/tests/data_files/server2.ku-ka.crt
+++ b/tests/data_files/server2.ku-ka.crt
@@ -1,21 +1,20 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server2.ku-ke.crt b/tests/data_files/server2.ku-ke.crt
index 8daa0c1..21e6cf0 100644
--- a/tests/data_files/server2.ku-ke.crt
+++ b/tests/data_files/server2.ku-ke.crt
@@ -1,21 +1,20 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server5-selfsigned.crt b/tests/data_files/server5-selfsigned.crt
index cb55647..0eafe70 100644
--- a/tests/data_files/server5-selfsigned.crt
+++ b/tests/data_files/server5-selfsigned.crt
@@ -1,12 +1,12 @@
 -----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/server5-ss-forgeca.crt b/tests/data_files/server5-ss-forgeca.crt
index 2265bf5..cf5bd6d 100644
--- a/tests/data_files/server5-ss-forgeca.crt
+++ b/tests/data_files/server5-ss-forgeca.crt
@@ -1,11 +1,11 @@
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diff --git a/tests/data_files/server5.eku-cli.crt b/tests/data_files/server5.eku-cli.crt
index 8aa2e44..8d04559 100644
--- a/tests/data_files/server5.eku-cli.crt
+++ b/tests/data_files/server5.eku-cli.crt
@@ -1,13 +1,13 @@
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diff --git a/tests/data_files/server5.eku-cs.crt b/tests/data_files/server5.eku-cs.crt
index db97b40..c00bc3b 100644
--- a/tests/data_files/server5.eku-cs.crt
+++ b/tests/data_files/server5.eku-cs.crt
@@ -1,13 +1,13 @@
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diff --git a/tests/data_files/server5.eku-cs_any.crt b/tests/data_files/server5.eku-cs_any.crt
index 8fa8632..912d929 100644
--- a/tests/data_files/server5.eku-cs_any.crt
+++ b/tests/data_files/server5.eku-cs_any.crt
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diff --git a/tests/data_files/server5.eku-srv.crt b/tests/data_files/server5.eku-srv.crt
index 64312f6..b173afc 100644
--- a/tests/data_files/server5.eku-srv.crt
+++ b/tests/data_files/server5.eku-srv.crt
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diff --git a/tests/data_files/server5.eku-srv_cli.crt b/tests/data_files/server5.eku-srv_cli.crt
index 9f58fed..be2531e 100644
--- a/tests/data_files/server5.eku-srv_cli.crt
+++ b/tests/data_files/server5.eku-srv_cli.crt
@@ -1,13 +1,13 @@
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diff --git a/tests/data_files/server5.ku-ds.crt b/tests/data_files/server5.ku-ds.crt
index 58dd071..dafff9b 100644
--- a/tests/data_files/server5.ku-ds.crt
+++ b/tests/data_files/server5.ku-ds.crt
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diff --git a/tests/data_files/server5.ku-ka.crt b/tests/data_files/server5.ku-ka.crt
index 2447326..74a4235 100644
--- a/tests/data_files/server5.ku-ka.crt
+++ b/tests/data_files/server5.ku-ka.crt
@@ -1,14 +1,13 @@
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server5.ku-ke.crt b/tests/data_files/server5.ku-ke.crt
index 41ae5ad..6b4e74e 100644
--- a/tests/data_files/server5.ku-ke.crt
+++ b/tests/data_files/server5.ku-ke.crt
@@ -1,14 +1,13 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server6-ss-child.crt b/tests/data_files/server6-ss-child.crt
index 3c6fd4d..fc28f34 100644
--- a/tests/data_files/server6-ss-child.crt
+++ b/tests/data_files/server6-ss-child.crt
@@ -1,13 +1,13 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server6-ss-child.crt.openssl.v3_ext b/tests/data_files/server6-ss-child.crt.openssl.v3_ext
new file mode 100644
index 0000000..dd9cdaa
--- /dev/null
+++ b/tests/data_files/server6-ss-child.crt.openssl.v3_ext
@@ -0,0 +1,4 @@
+basicConstraints = critical,CA:false
+keyUsage=critical,digitalSignature
+subjectKeyIdentifier=hash
+
diff --git a/tests/data_files/server9-bad-mgfhash.crt b/tests/data_files/server9-bad-mgfhash.crt
index 34ef69e..ad29942 100644
--- a/tests/data_files/server9-bad-mgfhash.crt
+++ b/tests/data_files/server9-bad-mgfhash.crt
@@ -1,20 +1,21 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server9-bad-saltlen.crt b/tests/data_files/server9-bad-saltlen.crt
index f4da883..45bf20e 100644
--- a/tests/data_files/server9-bad-saltlen.crt
+++ b/tests/data_files/server9-bad-saltlen.crt
@@ -1,20 +1,21 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server9-badsign.crt b/tests/data_files/server9-badsign.crt
index 9e56541..8656b1a 100644
--- a/tests/data_files/server9-badsign.crt
+++ b/tests/data_files/server9-badsign.crt
@@ -1,19 +1,19 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server9-defaults.crt b/tests/data_files/server9-defaults.crt
index 4ce5c87..8613f52 100644
--- a/tests/data_files/server9-defaults.crt
+++ b/tests/data_files/server9-defaults.crt
@@ -1,19 +1,18 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server9-sha224.crt b/tests/data_files/server9-sha224.crt
index 1b05f31..ed648c8 100644
--- a/tests/data_files/server9-sha224.crt
+++ b/tests/data_files/server9-sha224.crt
@@ -1,20 +1,21 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server9-sha256.crt b/tests/data_files/server9-sha256.crt
index 7d0aa39..ef37b3f 100644
--- a/tests/data_files/server9-sha256.crt
+++ b/tests/data_files/server9-sha256.crt
@@ -1,20 +1,21 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server9-sha384.crt b/tests/data_files/server9-sha384.crt
index aaa63e6..2ea0108 100644
--- a/tests/data_files/server9-sha384.crt
+++ b/tests/data_files/server9-sha384.crt
@@ -1,20 +1,21 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server9-sha512.crt b/tests/data_files/server9-sha512.crt
index a211b92..4abdf68 100644
--- a/tests/data_files/server9-sha512.crt
+++ b/tests/data_files/server9-sha512.crt
@@ -1,20 +1,21 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server9-with-ca.crt b/tests/data_files/server9-with-ca.crt
index 0478cff..51c0ada 100644
--- a/tests/data_files/server9-with-ca.crt
+++ b/tests/data_files/server9-with-ca.crt
@@ -1,99 +1,39 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
-Certificate:
-    Data:
-        Version: 3 (0x2)
-        Serial Number: 0 (0x0)
-        Signature Algorithm: sha1WithRSAEncryption
-        Issuer: C=NL, O=PolarSSL, CN=PolarSSL Test CA
-        Validity
-            Not Before: Feb 12 14:44:00 2011 GMT
-            Not After : Feb 12 14:44:00 2021 GMT
-        Subject: C=NL, O=PolarSSL, CN=PolarSSL Test CA
-        Subject Public Key Info:
-            Public Key Algorithm: rsaEncryption
-            RSA Public Key: (2048 bit)
-                Modulus (2048 bit):
-                    00:c0:df:37:fc:17:bb:e0:96:9d:3f:86:de:96:32:
-                    7d:44:a5:16:a0:cd:21:f1:99:d4:ec:ea:cb:7c:18:
-                    58:08:94:a5:ec:9b:c5:8b:df:1a:1e:99:38:99:87:
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-                    e8:b9:72:51:c5:ce:a3:30:52:a9:f2:e7:40:70:14:
-                    cb:44:a2:72:0b:c2:e5:40:f9:3e:e5:a6:0e:b3:f9:
-                    ec:4a:63:c0:b8:29:00:74:9c:57:3b:a8:a5:04:90:
-                    71:f1:bd:83:d9:3f:d6:a5:e2:3c:2a:8f:ef:27:60:
-                    c3:c6:9f:cb:ba:ec:60:7d:b7:e6:84:32:be:4f:fb:
-                    58:26:22:03:5b:d4:b4:d5:fb:f5:e3:96:2e:70:c0:
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-                    69:cb:47:b1:14:40:83:7d:67:f4:86:f6:31:ab:f1:
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-                    58:b1:54:0d:21:9a:73:37:a1:30:cf:6f:92:dc:f6:
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-                    ab:e9:c3:f2:cf:87:96:8f:80:02:32:9e:99:58:6f:
-                    a2:d5
-                Exponent: 65537 (0x10001)
-        X509v3 extensions:
-            X509v3 Basic Constraints: 
-                CA:TRUE
-            X509v3 Subject Key Identifier: 
-                B4:5A:E4:A5:B3:DE:D2:52:F6:B9:D5:A6:95:0F:EB:3E:BC:C7:FD:FF
-            X509v3 Authority Key Identifier: 
-                keyid:B4:5A:E4:A5:B3:DE:D2:52:F6:B9:D5:A6:95:0F:EB:3E:BC:C7:FD:FF
-                DirName:/C=NL/O=PolarSSL/CN=PolarSSL Test CA
-                serial:00
-
-    Signature Algorithm: sha1WithRSAEncryption
-        b8:fd:54:d8:00:54:90:8b:25:b0:27:dd:95:cd:a2:f7:84:07:
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-        32:89:be:63:47:53:ff:b6:be:f1:2e:8c:54:c0:99:3f:a0:b9:
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-        e1:8f:53:f6:67:93:c7:f9:6f:76:44:58:12:e8:3a:d4:97:e7:
-        e9:c0:3e:a8:7a:72:3d:87:53:1f:e5:2c:84:84:e7:9a:9e:7f:
-        66:d9:1f:9b:f5:13:48:b0:4d:14:d1:de:b2:24:d9:78:7d:f5:
-        35:cc:58:19:d1:d2:99:ef:4d:73:f8:1f:89:d4:5a:d0:52:ce:
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-        08:60:cd:32:18:d0:73:e0:58:71:d9:e5:d2:53:d7:8d:d0:ca:
-        e9:5d:2a:0a:0d:5d:55:ec:21:50:17:16:e6:06:4a:cd:5e:de:
-        f7:e0:e9:54
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/server9.crt b/tests/data_files/server9.crt
index a6f9fbc..26567ae 100644
--- a/tests/data_files/server9.crt
+++ b/tests/data_files/server9.crt
@@ -1,19 +1,19 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca-v1.crt b/tests/data_files/test-ca-v1.crt
index e5a3b1c..2f10f6d 100644
--- a/tests/data_files/test-ca-v1.crt
+++ b/tests/data_files/test-ca-v1.crt
@@ -1,19 +1,19 @@
 -----BEGIN CERTIFICATE-----
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+UtWET/0bsdiPn8SR9B3hWpKUDRvnHDDZuZiKtrdDEqsD04M=
 -----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca.opensslconf b/tests/data_files/test-ca.opensslconf
index 434876c..0340e9e 100644
--- a/tests/data_files/test-ca.opensslconf
+++ b/tests/data_files/test-ca.opensslconf
@@ -41,6 +41,11 @@
 [multiple_san]
 subjectAltName=@alt_names
 
+[ext_multi_nocn]
+basicConstraints = CA:false
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment
+subjectAltName = DNS:www.shotokan-braunschweig.de,DNS:www.massimo-abate.eu,IP:192.168.1.1,IP:192.168.69.144
+
 [hw_module_name]
 hwtype = OID:1.3.6.1.4.1.17.3
 hwserial = OCT:123456
diff --git a/tests/data_files/test-ca2.ku-crl.crt b/tests/data_files/test-ca2.ku-crl.crt
index 4fb4083..303a2c0 100644
--- a/tests/data_files/test-ca2.ku-crl.crt
+++ b/tests/data_files/test-ca2.ku-crl.crt
@@ -1,12 +1,12 @@
 -----BEGIN CERTIFICATE-----
-MIIBzDCCAVOgAwIBAgIJAP6mZLzh0IPSMAoGCCqGSM49BAMCMD4xCzAJBgNVBAYT
-Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
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 -----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca2.ku-crl.crt.openssl.v3_ext b/tests/data_files/test-ca2.ku-crl.crt.openssl.v3_ext
new file mode 100644
index 0000000..4bc5d3c
--- /dev/null
+++ b/tests/data_files/test-ca2.ku-crl.crt.openssl.v3_ext
@@ -0,0 +1,4 @@
+basicConstraints = CA:true
+subjectKeyIdentifier=none
+keyUsage = cRLSign
+
diff --git a/tests/data_files/test-ca2.ku-crt.crt b/tests/data_files/test-ca2.ku-crt.crt
index edacc64..5cad7b2 100644
--- a/tests/data_files/test-ca2.ku-crt.crt
+++ b/tests/data_files/test-ca2.ku-crt.crt
@@ -1,12 +1,12 @@
 -----BEGIN CERTIFICATE-----
-MIIBzTCCAVOgAwIBAgIJAODh6PAeD9/vMAoGCCqGSM49BAMCMD4xCzAJBgNVBAYT
-Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
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+d7zKl7IzmBuOWXYlukWDDWwpNI67z7g0JawfypKIxcPTZFiQXVtDdTdkrGY=
 -----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca2.ku-crt.crt.openssl.v3_ext b/tests/data_files/test-ca2.ku-crt.crt.openssl.v3_ext
new file mode 100644
index 0000000..997c893
--- /dev/null
+++ b/tests/data_files/test-ca2.ku-crt.crt.openssl.v3_ext
@@ -0,0 +1,4 @@
+basicConstraints = CA:true
+subjectKeyIdentifier=none
+keyUsage = keyCertSign
+
diff --git a/tests/data_files/test-ca2.ku-crt_crl.crt b/tests/data_files/test-ca2.ku-crt_crl.crt
index ac74e40..4c69582 100644
--- a/tests/data_files/test-ca2.ku-crt_crl.crt
+++ b/tests/data_files/test-ca2.ku-crt_crl.crt
@@ -1,12 +1,12 @@
 -----BEGIN CERTIFICATE-----
-MIIBzDCCAVOgAwIBAgIJAPejOupCJS65MAoGCCqGSM49BAMCMD4xCzAJBgNVBAYT
-Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
-QyBDQTAeFw0xNDA0MDkxMTIyMjVaFw0yNDA0MDYxMTIyMjVaMD4xCzAJBgNVBAYT
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+xknmJJ4H3Zlc+O5GlcX9VQNZDn1xV7hf2yW1Gf7wLTnSWTf5bXATaIQ6QLO1
 -----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca2.ku-crt_crl.crt.openssl.v3_ext b/tests/data_files/test-ca2.ku-crt_crl.crt.openssl.v3_ext
new file mode 100644
index 0000000..0fd73a2
--- /dev/null
+++ b/tests/data_files/test-ca2.ku-crt_crl.crt.openssl.v3_ext
@@ -0,0 +1,4 @@
+basicConstraints = CA:true
+subjectKeyIdentifier=none
+keyUsage = keyCertSign, cRLSign
+
diff --git a/tests/data_files/test-ca2.ku-ds.crt b/tests/data_files/test-ca2.ku-ds.crt
index c28e17b..2907aa7 100644
--- a/tests/data_files/test-ca2.ku-ds.crt
+++ b/tests/data_files/test-ca2.ku-ds.crt
@@ -1,12 +1,12 @@
 -----BEGIN CERTIFICATE-----
-MIIBzDCCAVOgAwIBAgIJAPOkPR3wsvm5MAoGCCqGSM49BAMCMD4xCzAJBgNVBAYT
-Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
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+xdmEPUr6PY54c0IQJNeeF76L1/+EszXrSDQ7TLv1YC4d4uMNmqwR9EGuUX+/
 -----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca2.ku-ds.crt.openssl.v3_ext b/tests/data_files/test-ca2.ku-ds.crt.openssl.v3_ext
new file mode 100644
index 0000000..08e49d4
--- /dev/null
+++ b/tests/data_files/test-ca2.ku-ds.crt.openssl.v3_ext
@@ -0,0 +1,4 @@
+basicConstraints = CA:true
+subjectKeyIdentifier=none
+keyUsage = digitalSignature
+
diff --git a/tests/include/test/drivers/config_test_driver.h b/tests/include/test/drivers/config_test_driver.h
index 2585fd9..81f9883 100644
--- a/tests/include/test/drivers/config_test_driver.h
+++ b/tests/include/test/drivers/config_test_driver.h
@@ -53,7 +53,4 @@
 //#define MBEDTLS_PEM_PARSE_C
 //#define MBEDTLS_BASE64_C
 
-#include "mbedtls/config_psa.h"
-#include "mbedtls/check_config.h"
-
 #endif /* MBEDTLS_CONFIG_H */
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index ef3345e..c3c1275 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -192,6 +192,10 @@
     # default to -O2, use -Ox _after_ this if you want another level
     ASAN_CFLAGS='-O2 -Werror -fsanitize=address,undefined -fno-sanitize-recover=all'
 
+    # Platform tests have an allocation that returns null
+    export ASAN_OPTIONS="allocator_may_return_null=1"
+    export MSAN_OPTIONS="allocator_may_return_null=1"
+
     # Gather the list of available components. These are the functions
     # defined in this script whose name starts with "component_".
     ALL_COMPONENTS=$(compgen -A function component_ | sed 's/component_//')
@@ -1868,6 +1872,16 @@
     export SKIP_TEST_SUITES
 }
 
+skip_all_except_given_suite () {
+    # Skip all but the given test suite
+    SKIP_TEST_SUITES=$(
+        ls -1 tests/suites/test_suite_*.function |
+        grep -v $1.function |
+         sed 's/tests.suites.test_suite_//; s/\.function$//' |
+        tr '\n' ,)
+    export SKIP_TEST_SUITES
+}
+
 component_test_memsan_constant_flow () {
     # This tests both (1) accesses to undefined memory, and (2) branches or
     # memory access depending on secret values. To distinguish between those:
@@ -1927,6 +1941,16 @@
     # details are left in Testing/<date>/DynamicAnalysis.xml
     msg "test: some suites (full minus MBEDTLS_USE_PSA_CRYPTO, valgrind + constant flow)"
     make memcheck
+
+    # Test asm path in constant time module - by default, it will test the plain C
+    # path under Valgrind or Memsan. Running only the constant_time tests is fast (<1s)
+    msg "test: valgrind asm constant_time"
+    scripts/config.py --force set MBEDTLS_TEST_CONSTANT_FLOW_ASM
+    skip_all_except_given_suite test_suite_constant_time
+    cmake -D CMAKE_BUILD_TYPE:String=Release .
+    make clean
+    make
+    make memcheck
 }
 
 component_test_valgrind_constant_flow_psa () {
@@ -3950,7 +3974,7 @@
     # We can only grep /proc/cpuinfo on Linux, so this also checks for Linux
     (gcc -v 2>&1 | grep Target | grep -q x86_64) &&
         [[ "$HOSTTYPE" == "x86_64" && "$OSTYPE" == "linux-gnu" ]] &&
-        (grep '^flags' /proc/cpuinfo | grep -qw aes)
+        (lscpu | grep -qw aes)
 }
 
 component_test_aesni () { # ~ 60s
@@ -3963,29 +3987,136 @@
 
     msg "build: default config with different AES implementations"
     scripts/config.py set MBEDTLS_AESNI_C
+    scripts/config.py unset MBEDTLS_AES_USE_HARDWARE_ONLY
     scripts/config.py set MBEDTLS_HAVE_ASM
 
     # test the intrinsics implementation
     msg "AES tests, test intrinsics"
     make clean
-    make test programs/test/selftest CC=gcc CFLAGS='-Werror -Wall -Wextra -mpclmul -msse2 -maes'
+    make CC=gcc CFLAGS='-Werror -Wall -Wextra -mpclmul -msse2 -maes'
     # check that we built intrinsics - this should be used by default when supported by the compiler
-    ./programs/test/selftest | grep "AESNI code" | grep -q "intrinsics"
+    ./programs/test/selftest aes | grep "AESNI code" | grep -q "intrinsics"
 
     # test the asm implementation
     msg "AES tests, test assembly"
     make clean
-    make test programs/test/selftest CC=gcc CFLAGS='-Werror -Wall -Wextra -mno-pclmul -mno-sse2 -mno-aes'
+    make CC=gcc CFLAGS='-Werror -Wall -Wextra -mno-pclmul -mno-sse2 -mno-aes'
     # check that we built assembly - this should be built if the compiler does not support intrinsics
-    ./programs/test/selftest | grep "AESNI code" | grep -q "assembly"
+    ./programs/test/selftest aes | grep "AESNI code" | grep -q "assembly"
 
     # test the plain C implementation
     scripts/config.py unset MBEDTLS_AESNI_C
+    scripts/config.py unset MBEDTLS_AES_USE_HARDWARE_ONLY
     msg "AES tests, plain C"
     make clean
-    make test programs/test/selftest CC=gcc CFLAGS='-O2 -Werror'
+    make CC=gcc CFLAGS='-O2 -Werror'
     # check that there is no AESNI code present
-    ./programs/test/selftest | not grep -q "AESNI code"
+    ./programs/test/selftest aes | not grep -q "AESNI code"
+    not grep -q "AES note: using AESNI" ./programs/test/selftest
+    grep -q "AES note: built-in implementation." ./programs/test/selftest
+
+    # test the intrinsics implementation
+    scripts/config.py set MBEDTLS_AESNI_C
+    scripts/config.py set MBEDTLS_AES_USE_HARDWARE_ONLY
+    msg "AES tests, test AESNI only"
+    make clean
+    make CC=gcc CFLAGS='-Werror -Wall -Wextra -mpclmul -msse2 -maes'
+    ./programs/test/selftest aes | grep -q "AES note: using AESNI"
+    ./programs/test/selftest aes | not grep -q "AES note: built-in implementation."
+    grep -q "AES note: using AESNI" ./programs/test/selftest
+    not grep -q "AES note: built-in implementation." ./programs/test/selftest
+}
+
+
+
+support_test_aesni_m32() {
+    support_test_m32_o0 && (lscpu | grep -qw aes)
+}
+
+component_test_aesni_m32 () { # ~ 60s
+    # This tests are duplicated from component_test_aesni for i386 target
+    #
+    # AESNI intrinsic code supports i386 and assembly code does not support it.
+
+    msg "build: default config with different AES implementations"
+    scripts/config.py set MBEDTLS_AESNI_C
+    scripts/config.py set MBEDTLS_PADLOCK_C
+    scripts/config.py unset MBEDTLS_AES_USE_HARDWARE_ONLY
+    scripts/config.py set MBEDTLS_HAVE_ASM
+
+    # test the intrinsics implementation
+    msg "AES tests, test intrinsics"
+    make clean
+    make CC=gcc CFLAGS='-m32 -Werror -Wall -Wextra -mpclmul -msse2 -maes' LDFLAGS='-m32'
+    # check that we built intrinsics - this should be used by default when supported by the compiler
+    ./programs/test/selftest aes | grep "AESNI code" | grep -q "intrinsics"
+    grep -q "AES note: using AESNI" ./programs/test/selftest
+    grep -q "AES note: built-in implementation." ./programs/test/selftest
+    grep -q "AES note: using VIA Padlock" ./programs/test/selftest
+    grep -q mbedtls_aesni_has_support ./programs/test/selftest
+
+    scripts/config.py set MBEDTLS_AESNI_C
+    scripts/config.py unset MBEDTLS_PADLOCK_C
+    scripts/config.py set MBEDTLS_AES_USE_HARDWARE_ONLY
+    msg "AES tests, test AESNI only"
+    make clean
+    make CC=gcc CFLAGS='-m32 -Werror -Wall -Wextra -mpclmul -msse2 -maes' LDFLAGS='-m32'
+    ./programs/test/selftest aes | grep -q "AES note: using AESNI"
+    ./programs/test/selftest aes | not grep -q "AES note: built-in implementation."
+    grep -q "AES note: using AESNI" ./programs/test/selftest
+    not grep -q "AES note: built-in implementation." ./programs/test/selftest
+    not grep -q "AES note: using VIA Padlock" ./programs/test/selftest
+    not grep -q mbedtls_aesni_has_support ./programs/test/selftest
+}
+
+# For timebeing, no aarch64 gcc available in CI and no arm64 CI node.
+component_build_aes_aesce_armcc () {
+    msg "Build: AESCE test on arm64 platform without plain C."
+    scripts/config.py baremetal
+
+    # armc[56] don't support SHA-512 intrinsics
+    scripts/config.py unset MBEDTLS_SHA512_USE_A64_CRYPTO_IF_PRESENT
+
+    # Stop armclang warning about feature detection for A64_CRYPTO.
+    # With this enabled, the library does build correctly under armclang,
+    # but in baremetal builds (as tested here), feature detection is
+    # unavailable, and the user is notified via a #warning. So enabling
+    # this feature would prevent us from building with -Werror on
+    # armclang. Tracked in #7198.
+    scripts/config.py unset MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT
+    scripts/config.py set MBEDTLS_HAVE_ASM
+
+    msg "AESCE, build with default configuration."
+    scripts/config.py set MBEDTLS_AESCE_C
+    scripts/config.py unset MBEDTLS_AES_USE_HARDWARE_ONLY
+    armc6_build_test "-O1 --target=aarch64-arm-none-eabi -march=armv8-a+crypto"
+
+    msg "AESCE, build AESCE only"
+    scripts/config.py set MBEDTLS_AESCE_C
+    scripts/config.py set MBEDTLS_AES_USE_HARDWARE_ONLY
+    armc6_build_test "-O1 --target=aarch64-arm-none-eabi -march=armv8-a+crypto"
+}
+
+# For timebeing, no VIA Padlock platform available.
+component_build_aes_via_padlock () {
+
+    msg "AES:VIA PadLock, build with default configuration."
+    scripts/config.py unset MBEDTLS_AESNI_C
+    scripts/config.py set MBEDTLS_PADLOCK_C
+    scripts/config.py unset MBEDTLS_AES_USE_HARDWARE_ONLY
+    make CC=gcc CFLAGS="$ASAN_CFLAGS -m32 -O2" LDFLAGS="-m32 $ASAN_CFLAGS"
+    grep -q mbedtls_padlock_has_support ./programs/test/selftest
+
+}
+
+support_build_aes_via_padlock_only () {
+    ( [ "$MBEDTLS_TEST_PLATFORM" == "Linux-x86_64" ] || \
+        [ "$MBEDTLS_TEST_PLATFORM" == "Linux-amd64" ] ) && \
+    [ "`dpkg --print-foreign-architectures`" == "i386" ]
+}
+
+support_build_aes_aesce_armcc () {
+    support_build_armcc
 }
 
 component_test_aes_only_128_bit_keys () {
@@ -4253,6 +4384,7 @@
     # build) and not the i386-specific inline assembly.
     msg "build: i386, make, gcc -O0 (ASan build)" # ~ 30s
     scripts/config.py full
+    scripts/config.py unset MBEDTLS_AESNI_C # AESNI depends on cpu modifiers
     make CC=gcc CFLAGS="$ASAN_CFLAGS -m32 -O0" LDFLAGS="-m32 $ASAN_CFLAGS"
 
     msg "test: i386, make, gcc -O0 (ASan build)"
@@ -4270,6 +4402,7 @@
     # and go faster for tests.
     msg "build: i386, make, gcc -O2 (ASan build)" # ~ 30s
     scripts/config.py full
+    scripts/config.py unset MBEDTLS_AESNI_C # AESNI depends on cpu modifiers
     make CC=gcc CFLAGS="$ASAN_CFLAGS -m32 -O2" LDFLAGS="-m32 $ASAN_CFLAGS"
 
     msg "test: i386, make, gcc -O2 (ASan build)"
@@ -4285,6 +4418,7 @@
 component_test_m32_everest () {
     msg "build: i386, Everest ECDH context (ASan build)" # ~ 6 min
     scripts/config.py set MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED
+    scripts/config.py unset MBEDTLS_AESNI_C # AESNI depends on cpu modifiers
     make CC=gcc CFLAGS="$ASAN_CFLAGS -m32 -O2" LDFLAGS="-m32 $ASAN_CFLAGS"
 
     msg "test: i386, Everest ECDH context - main suites (inc. selftests) (ASan build)" # ~ 50s
@@ -4738,6 +4872,7 @@
 
 component_build_mingw () {
     msg "build: Windows cross build - mingw64, make (Link Library)" # ~ 30s
+    scripts/config.py unset MBEDTLS_AESNI_C # AESNI depends on cpu modifiers
     make CC=i686-w64-mingw32-gcc AR=i686-w64-mingw32-ar LD=i686-w64-minggw32-ld CFLAGS='-Werror -Wall -Wextra' WINDOWS_BUILD=1 lib programs
 
     # note Make tests only builds the tests, but doesn't run them
@@ -5042,6 +5177,7 @@
     python3 -m unittest tests/scripts/translate_ciphers.py 2>&1
 }
 
+
 ################################################################
 #### Termination
 ################################################################
diff --git a/tests/scripts/analyze_outcomes.py b/tests/scripts/analyze_outcomes.py
index c6891bb..3b91bfb 100755
--- a/tests/scripts/analyze_outcomes.py
+++ b/tests/scripts/analyze_outcomes.py
@@ -73,15 +73,22 @@
         Results.log("Error: failed to run reference/driver components")
         sys.exit(ret_val)
 
-def analyze_coverage(results, outcomes):
+def analyze_coverage(results, outcomes, allow_list, full_coverage):
     """Check that all available test cases are executed at least once."""
     available = check_test_cases.collect_available_test_cases()
     for key in available:
         hits = outcomes[key].hits() if key in outcomes else 0
-        if hits == 0:
-            # Make this a warning, not an error, as long as we haven't
-            # fixed this branch to have full coverage of test cases.
-            results.warning('Test case not executed: {}', key)
+        if hits == 0 and key not in allow_list:
+            if full_coverage:
+                results.error('Test case not executed: {}', key)
+            else:
+                results.warning('Test case not executed: {}', key)
+        elif hits != 0 and key in allow_list:
+            # Test Case should be removed from the allow list.
+            if full_coverage:
+                results.error('Allow listed test case was executed: {}', key)
+            else:
+                results.warning('Allow listed test case was executed: {}', key)
 
 def analyze_driver_vs_reference(outcomes, component_ref, component_driver,
                                 ignored_suites, ignored_test=None):
@@ -122,10 +129,11 @@
             result = False
     return result
 
-def analyze_outcomes(outcomes):
+def analyze_outcomes(outcomes, args):
     """Run all analyses on the given outcome collection."""
     results = Results()
-    analyze_coverage(results, outcomes)
+    analyze_coverage(results, outcomes, args['allow_list'],
+                     args['full_coverage'])
     return results
 
 def read_outcome_file(outcome_file):
@@ -151,10 +159,9 @@
 
 def do_analyze_coverage(outcome_file, args):
     """Perform coverage analysis."""
-    del args # unused
     outcomes = read_outcome_file(outcome_file)
     Results.log("\n*** Analyze coverage ***\n")
-    results = analyze_outcomes(outcomes)
+    results = analyze_outcomes(outcomes, args)
     return results.error_count == 0
 
 def do_analyze_driver_vs_reference(outcome_file, args):
@@ -175,8 +182,16 @@
 TASKS = {
     'analyze_coverage':                 {
         'test_function': do_analyze_coverage,
-        'args': {}
-        },
+        'args': {
+            'allow_list': [
+                # Algorithm not supported yet
+                'test_suite_psa_crypto_metadata;Asymmetric signature: pure EdDSA',
+                # Algorithm not supported yet
+                'test_suite_psa_crypto_metadata;Cipher: XTS',
+            ],
+            'full_coverage': False,
+        }
+    },
     # There are 2 options to use analyze_driver_vs_reference_xxx locally:
     # 1. Run tests and then analysis:
     #   - tests/scripts/all.sh --outcome-file "$PWD/out.csv" <component_ref> <component_driver>
@@ -426,6 +441,11 @@
                                  'comma/space-separated list of tasks. ')
         parser.add_argument('--list', action='store_true',
                             help='List all available tasks and exit.')
+        parser.add_argument('--require-full-coverage', action='store_true',
+                            dest='full_coverage', help="Require all available "
+                            "test cases to be executed and issue an error "
+                            "otherwise. This flag is ignored if 'task' is "
+                            "neither 'all' nor 'analyze_coverage'")
         options = parser.parse_args()
 
         if options.list:
@@ -445,6 +465,9 @@
                     Results.log('Error: invalid task: {}'.format(task))
                     sys.exit(1)
 
+        TASKS['analyze_coverage']['args']['full_coverage'] = \
+            options.full_coverage
+
         for task in TASKS:
             if task in tasks:
                 if not TASKS[task]['test_function'](options.outcomes, TASKS[task]['args']):
diff --git a/tests/scripts/audit-validity-dates.py b/tests/scripts/audit-validity-dates.py
index 5506e40..623fd23 100755
--- a/tests/scripts/audit-validity-dates.py
+++ b/tests/scripts/audit-validity-dates.py
@@ -24,7 +24,6 @@
 """
 
 import os
-import sys
 import re
 import typing
 import argparse
@@ -43,6 +42,7 @@
 
 import scripts_path # pylint: disable=unused-import
 from mbedtls_dev import build_tree
+from mbedtls_dev import logging_util
 
 def check_cryptography_version():
     match = re.match(r'^[0-9]+', cryptography.__version__)
@@ -393,38 +393,6 @@
             loc))
 
 
-def configure_logger(logger: logging.Logger) -> None:
-    """
-    Configure the logging.Logger instance so that:
-        - Format is set to "[%(levelname)s]: %(message)s".
-        - loglevel >= WARNING are printed to stderr.
-        - loglevel <  WARNING are printed to stdout.
-    """
-    class MaxLevelFilter(logging.Filter):
-        # pylint: disable=too-few-public-methods
-        def __init__(self, max_level, name=''):
-            super().__init__(name)
-            self.max_level = max_level
-
-        def filter(self, record: logging.LogRecord) -> bool:
-            return record.levelno <= self.max_level
-
-    log_formatter = logging.Formatter("[%(levelname)s]: %(message)s")
-
-    # set loglevel >= WARNING to be printed to stderr
-    stderr_hdlr = logging.StreamHandler(sys.stderr)
-    stderr_hdlr.setLevel(logging.WARNING)
-    stderr_hdlr.setFormatter(log_formatter)
-
-    # set loglevel <= INFO to be printed to stdout
-    stdout_hdlr = logging.StreamHandler(sys.stdout)
-    stdout_hdlr.addFilter(MaxLevelFilter(logging.INFO))
-    stdout_hdlr.setFormatter(log_formatter)
-
-    logger.addHandler(stderr_hdlr)
-    logger.addHandler(stdout_hdlr)
-
-
 def main():
     """
     Perform argument parsing.
@@ -457,7 +425,7 @@
     # start main routine
     # setup logger
     logger = logging.getLogger()
-    configure_logger(logger)
+    logging_util.configure_logger(logger)
     logger.setLevel(logging.DEBUG if args.verbose else logging.ERROR)
 
     td_auditor = TestDataAuditor(logger)
diff --git a/tests/scripts/generate_psa_tests.py b/tests/scripts/generate_psa_tests.py
index 9934578..b6f83c1 100755
--- a/tests/scripts/generate_psa_tests.py
+++ b/tests/scripts/generate_psa_tests.py
@@ -26,151 +26,15 @@
 from typing import Callable, Dict, FrozenSet, Iterable, Iterator, List, Optional
 
 import scripts_path # pylint: disable=unused-import
+from mbedtls_dev import crypto_data_tests
 from mbedtls_dev import crypto_knowledge
-from mbedtls_dev import macro_collector
+from mbedtls_dev import macro_collector #pylint: disable=unused-import
+from mbedtls_dev import psa_information
 from mbedtls_dev import psa_storage
 from mbedtls_dev import test_case
 from mbedtls_dev import test_data_generation
 
 
-def psa_want_symbol(name: str) -> str:
-    """Return the PSA_WANT_xxx symbol associated with a PSA crypto feature."""
-    if name.startswith('PSA_'):
-        return name[:4] + 'WANT_' + name[4:]
-    else:
-        raise ValueError('Unable to determine the PSA_WANT_ symbol for ' + name)
-
-def finish_family_dependency(dep: str, bits: int) -> str:
-    """Finish dep if it's a family dependency symbol prefix.
-
-    A family dependency symbol prefix is a PSA_WANT_ symbol that needs to be
-    qualified by the key size. If dep is such a symbol, finish it by adjusting
-    the prefix and appending the key size. Other symbols are left unchanged.
-    """
-    return re.sub(r'_FAMILY_(.*)', r'_\1_' + str(bits), dep)
-
-def finish_family_dependencies(dependencies: List[str], bits: int) -> List[str]:
-    """Finish any family dependency symbol prefixes.
-
-    Apply `finish_family_dependency` to each element of `dependencies`.
-    """
-    return [finish_family_dependency(dep, bits) for dep in dependencies]
-
-SYMBOLS_WITHOUT_DEPENDENCY = frozenset([
-    'PSA_ALG_AEAD_WITH_AT_LEAST_THIS_LENGTH_TAG', # modifier, only in policies
-    'PSA_ALG_AEAD_WITH_SHORTENED_TAG', # modifier
-    'PSA_ALG_ANY_HASH', # only in policies
-    'PSA_ALG_AT_LEAST_THIS_LENGTH_MAC', # modifier, only in policies
-    'PSA_ALG_KEY_AGREEMENT', # chaining
-    'PSA_ALG_TRUNCATED_MAC', # modifier
-])
-def automatic_dependencies(*expressions: str) -> List[str]:
-    """Infer dependencies of a test case by looking for PSA_xxx symbols.
-
-    The arguments are strings which should be C expressions. Do not use
-    string literals or comments as this function is not smart enough to
-    skip them.
-    """
-    used = set()
-    for expr in expressions:
-        used.update(re.findall(r'PSA_(?:ALG|ECC_FAMILY|KEY_TYPE)_\w+', expr))
-    used.difference_update(SYMBOLS_WITHOUT_DEPENDENCY)
-    return sorted(psa_want_symbol(name) for name in used)
-
-# Define set of regular expressions and dependencies to optionally append
-# extra dependencies for test case.
-AES_128BIT_ONLY_DEP_REGEX = r'AES\s(192|256)'
-AES_128BIT_ONLY_DEP = ["!MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH"]
-
-DEPENDENCY_FROM_KEY = {
-    AES_128BIT_ONLY_DEP_REGEX: AES_128BIT_ONLY_DEP
-}#type: Dict[str, List[str]]
-def generate_key_dependencies(description: str) -> List[str]:
-    """Return additional dependencies based on pairs of REGEX and dependencies.
-    """
-    deps = []
-    for regex, dep in DEPENDENCY_FROM_KEY.items():
-        if re.search(regex, description):
-            deps += dep
-
-    return deps
-
-# A temporary hack: at the time of writing, not all dependency symbols
-# are implemented yet. Skip test cases for which the dependency symbols are
-# not available. Once all dependency symbols are available, this hack must
-# be removed so that a bug in the dependency symbols properly leads to a test
-# failure.
-def read_implemented_dependencies(filename: str) -> FrozenSet[str]:
-    return frozenset(symbol
-                     for line in open(filename)
-                     for symbol in re.findall(r'\bPSA_WANT_\w+\b', line))
-_implemented_dependencies = None #type: Optional[FrozenSet[str]] #pylint: disable=invalid-name
-def hack_dependencies_not_implemented(dependencies: List[str]) -> None:
-    global _implemented_dependencies #pylint: disable=global-statement,invalid-name
-    if _implemented_dependencies is None:
-        _implemented_dependencies = \
-            read_implemented_dependencies('include/psa/crypto_config.h')
-    if not all((dep.lstrip('!') in _implemented_dependencies or
-                not dep.lstrip('!').startswith('PSA_WANT'))
-               for dep in dependencies):
-        dependencies.append('DEPENDENCY_NOT_IMPLEMENTED_YET')
-
-def tweak_key_pair_dependency(dep: str, usage: str):
-    """
-    This helper function add the proper suffix to PSA_WANT_KEY_TYPE_xxx_KEY_PAIR
-    symbols according to the required usage.
-    """
-    ret_list = list()
-    if dep.endswith('KEY_PAIR'):
-        if usage == "BASIC":
-            # BASIC automatically includes IMPORT and EXPORT for test purposes (see
-            # config_psa.h).
-            ret_list.append(re.sub(r'KEY_PAIR', r'KEY_PAIR_BASIC', dep))
-            ret_list.append(re.sub(r'KEY_PAIR', r'KEY_PAIR_IMPORT', dep))
-            ret_list.append(re.sub(r'KEY_PAIR', r'KEY_PAIR_EXPORT', dep))
-        elif usage == "GENERATE":
-            ret_list.append(re.sub(r'KEY_PAIR', r'KEY_PAIR_GENERATE', dep))
-    else:
-        # No replacement to do in this case
-        ret_list.append(dep)
-    return ret_list
-
-def fix_key_pair_dependencies(dep_list: List[str], usage: str):
-    new_list = [new_deps
-                for dep in dep_list
-                for new_deps in tweak_key_pair_dependency(dep, usage)]
-
-    return new_list
-
-class Information:
-    """Gather information about PSA constructors."""
-
-    def __init__(self) -> None:
-        self.constructors = self.read_psa_interface()
-
-    @staticmethod
-    def remove_unwanted_macros(
-            constructors: macro_collector.PSAMacroEnumerator
-    ) -> None:
-        # Mbed TLS does not support finite-field DSA.
-        # Don't attempt to generate any related test case.
-        constructors.key_types.discard('PSA_KEY_TYPE_DSA_KEY_PAIR')
-        constructors.key_types.discard('PSA_KEY_TYPE_DSA_PUBLIC_KEY')
-
-    def read_psa_interface(self) -> macro_collector.PSAMacroEnumerator:
-        """Return the list of known key types, algorithms, etc."""
-        constructors = macro_collector.InputsForTest()
-        header_file_names = ['include/psa/crypto_values.h',
-                             'include/psa/crypto_extra.h']
-        test_suites = ['tests/suites/test_suite_psa_crypto_metadata.data']
-        for header_file_name in header_file_names:
-            constructors.parse_header(header_file_name)
-        for test_cases in test_suites:
-            constructors.parse_test_cases(test_cases)
-        self.remove_unwanted_macros(constructors)
-        constructors.gather_arguments()
-        return constructors
-
 
 def test_case_for_key_type_not_supported(
         verb: str, key_type: str, bits: int,
@@ -181,7 +45,7 @@
     """Return one test case exercising a key creation method
     for an unsupported key type or size.
     """
-    hack_dependencies_not_implemented(dependencies)
+    psa_information.hack_dependencies_not_implemented(dependencies)
     tc = test_case.TestCase()
     short_key_type = crypto_knowledge.short_expression(key_type)
     adverb = 'not' if dependencies else 'never'
@@ -197,7 +61,7 @@
 class KeyTypeNotSupported:
     """Generate test cases for when a key type is not supported."""
 
-    def __init__(self, info: Information) -> None:
+    def __init__(self, info: psa_information.Information) -> None:
         self.constructors = info.constructors
 
     ALWAYS_SUPPORTED = frozenset([
@@ -224,20 +88,22 @@
             # They would be skipped in all configurations, which is noise.
             return
         import_dependencies = [('!' if param is None else '') +
-                               psa_want_symbol(kt.name)]
+                               psa_information.psa_want_symbol(kt.name)]
         if kt.params is not None:
             import_dependencies += [('!' if param == i else '') +
-                                    psa_want_symbol(sym)
+                                    psa_information.psa_want_symbol(sym)
                                     for i, sym in enumerate(kt.params)]
         if kt.name.endswith('_PUBLIC_KEY'):
             generate_dependencies = []
         else:
-            generate_dependencies = fix_key_pair_dependencies(import_dependencies, 'GENERATE')
-            import_dependencies = fix_key_pair_dependencies(import_dependencies, 'BASIC')
+            generate_dependencies = \
+                psa_information.fix_key_pair_dependencies(import_dependencies, 'GENERATE')
+            import_dependencies = \
+                psa_information.fix_key_pair_dependencies(import_dependencies, 'BASIC')
         for bits in kt.sizes_to_test():
             yield test_case_for_key_type_not_supported(
                 'import', kt.expression, bits,
-                finish_family_dependencies(import_dependencies, bits),
+                psa_information.finish_family_dependencies(import_dependencies, bits),
                 test_case.hex_string(kt.key_material(bits)),
                 param_descr=param_descr,
             )
@@ -251,7 +117,7 @@
             if not kt.is_public():
                 yield test_case_for_key_type_not_supported(
                     'generate', kt.expression, bits,
-                    finish_family_dependencies(generate_dependencies, bits),
+                    psa_information.finish_family_dependencies(generate_dependencies, bits),
                     str(bits),
                     param_descr=param_descr,
                 )
@@ -294,7 +160,7 @@
 ) -> test_case.TestCase:
     """Return one test case exercising a key generation.
     """
-    hack_dependencies_not_implemented(dependencies)
+    psa_information.hack_dependencies_not_implemented(dependencies)
     tc = test_case.TestCase()
     short_key_type = crypto_knowledge.short_expression(key_type)
     tc.set_description('PSA {} {}-bit'
@@ -308,7 +174,7 @@
 class KeyGenerate:
     """Generate positive and negative (invalid argument) test cases for key generation."""
 
-    def __init__(self, info: Information) -> None:
+    def __init__(self, info: psa_information.Information) -> None:
         self.constructors = info.constructors
 
     ECC_KEY_TYPES = ('PSA_KEY_TYPE_ECC_KEY_PAIR',
@@ -327,9 +193,9 @@
         """
         result = 'PSA_SUCCESS'
 
-        import_dependencies = [psa_want_symbol(kt.name)]
+        import_dependencies = [psa_information.psa_want_symbol(kt.name)]
         if kt.params is not None:
-            import_dependencies += [psa_want_symbol(sym)
+            import_dependencies += [psa_information.psa_want_symbol(sym)
                                     for i, sym in enumerate(kt.params)]
         if kt.name.endswith('_PUBLIC_KEY'):
             # The library checks whether the key type is a public key generically,
@@ -338,7 +204,8 @@
             generate_dependencies = []
             result = 'PSA_ERROR_INVALID_ARGUMENT'
         else:
-            generate_dependencies = fix_key_pair_dependencies(import_dependencies, 'GENERATE')
+            generate_dependencies = \
+                psa_information.fix_key_pair_dependencies(import_dependencies, 'GENERATE')
         for bits in kt.sizes_to_test():
             if kt.name == 'PSA_KEY_TYPE_RSA_KEY_PAIR':
                 size_dependency = "PSA_VENDOR_RSA_GENERATE_MIN_KEY_BITS <= " +  str(bits)
@@ -347,7 +214,7 @@
                 test_dependencies = generate_dependencies
             yield test_case_for_key_generation(
                 kt.expression, bits,
-                finish_family_dependencies(test_dependencies, bits),
+                psa_information.finish_family_dependencies(test_dependencies, bits),
                 str(bits),
                 result
             )
@@ -380,7 +247,7 @@
         INCOMPATIBLE = 2
         PUBLIC = 3
 
-    def __init__(self, info: Information) -> None:
+    def __init__(self, info: psa_information.Information) -> None:
         self.constructors = info.constructors
         key_type_expressions = self.constructors.generate_expressions(
             sorted(self.constructors.key_types)
@@ -417,8 +284,8 @@
                                    pretty_alg,
                                    pretty_reason,
                                    ' with ' + pretty_type if pretty_type else ''))
-        dependencies = automatic_dependencies(alg.base_expression, key_type)
-        dependencies = fix_key_pair_dependencies(dependencies, 'BASIC')
+        dependencies = psa_information.automatic_dependencies(alg.base_expression, key_type)
+        dependencies = psa_information.fix_key_pair_dependencies(dependencies, 'BASIC')
         for i, dep in enumerate(dependencies):
             if dep in not_deps:
                 dependencies[i] = '!' + dep
@@ -445,7 +312,7 @@
         """Generate failure test cases for keyless operations with the specified algorithm."""
         if alg.can_do(category):
             # Compatible operation, unsupported algorithm
-            for dep in automatic_dependencies(alg.base_expression):
+            for dep in psa_information.automatic_dependencies(alg.base_expression):
                 yield self.make_test_case(alg, category,
                                           self.Reason.NOT_SUPPORTED,
                                           not_deps=frozenset([dep]))
@@ -463,7 +330,7 @@
             key_is_compatible = kt.can_do(alg)
             if key_is_compatible and alg.can_do(category):
                 # Compatible key and operation, unsupported algorithm
-                for dep in automatic_dependencies(alg.base_expression):
+                for dep in psa_information.automatic_dependencies(alg.base_expression):
                     yield self.make_test_case(alg, category,
                                               self.Reason.NOT_SUPPORTED,
                                               kt=kt, not_deps=frozenset([dep]))
@@ -569,7 +436,7 @@
 class StorageFormat:
     """Storage format stability test cases."""
 
-    def __init__(self, info: Information, version: int, forward: bool) -> None:
+    def __init__(self, info: psa_information.Information, version: int, forward: bool) -> None:
         """Prepare to generate test cases for storage format stability.
 
         * `info`: information about the API. See the `Information` class.
@@ -636,13 +503,13 @@
         verb = 'save' if self.forward else 'read'
         tc = test_case.TestCase()
         tc.set_description(verb + ' ' + key.description)
-        dependencies = automatic_dependencies(
+        dependencies = psa_information.automatic_dependencies(
             key.lifetime.string, key.type.string,
             key.alg.string, key.alg2.string,
         )
-        dependencies = finish_family_dependencies(dependencies, key.bits)
-        dependencies += generate_key_dependencies(key.description)
-        dependencies = fix_key_pair_dependencies(dependencies, 'BASIC')
+        dependencies = psa_information.finish_family_dependencies(dependencies, key.bits)
+        dependencies += psa_information.generate_key_dependencies(key.description)
+        dependencies = psa_information.fix_key_pair_dependencies(dependencies, 'BASIC')
         tc.set_dependencies(dependencies)
         tc.set_function('key_storage_' + verb)
         if self.forward:
@@ -847,13 +714,13 @@
 class StorageFormatForward(StorageFormat):
     """Storage format stability test cases for forward compatibility."""
 
-    def __init__(self, info: Information, version: int) -> None:
+    def __init__(self, info: psa_information.Information, version: int) -> None:
         super().__init__(info, version, True)
 
 class StorageFormatV0(StorageFormat):
     """Storage format stability test cases for version 0 compatibility."""
 
-    def __init__(self, info: Information) -> None:
+    def __init__(self, info: psa_information.Information) -> None:
         super().__init__(info, 0, False)
 
     def all_keys_for_usage_flags(self) -> Iterator[StorageTestData]:
@@ -963,6 +830,7 @@
         yield from super().generate_all_keys()
         yield from self.all_keys_for_implicit_usage()
 
+
 class PSATestGenerator(test_data_generation.TestGenerator):
     """Test generator subclass including PSA targets and info."""
     # Note that targets whose names contain 'test_format' have their content
@@ -972,20 +840,23 @@
         lambda info: KeyGenerate(info).test_cases_for_key_generation(),
         'test_suite_psa_crypto_not_supported.generated':
         lambda info: KeyTypeNotSupported(info).test_cases_for_not_supported(),
+        'test_suite_psa_crypto_low_hash.generated':
+        lambda info: crypto_data_tests.HashPSALowLevel(info).all_test_cases(),
         'test_suite_psa_crypto_op_fail.generated':
         lambda info: OpFail(info).all_test_cases(),
         'test_suite_psa_crypto_storage_format.current':
         lambda info: StorageFormatForward(info, 0).all_test_cases(),
         'test_suite_psa_crypto_storage_format.v0':
         lambda info: StorageFormatV0(info).all_test_cases(),
-    } #type: Dict[str, Callable[[Information], Iterable[test_case.TestCase]]]
+    } #type: Dict[str, Callable[[psa_information.Information], Iterable[test_case.TestCase]]]
 
     def __init__(self, options):
         super().__init__(options)
-        self.info = Information()
+        self.info = psa_information.Information()
 
     def generate_target(self, name: str, *target_args) -> None:
         super().generate_target(name, self.info)
 
+
 if __name__ == '__main__':
     test_data_generation.main(sys.argv[1:], __doc__, PSATestGenerator)
diff --git a/tests/src/bignum_helpers.c b/tests/src/bignum_helpers.c
index efb2eca..214530d 100644
--- a/tests/src/bignum_helpers.c
+++ b/tests/src/bignum_helpers.c
@@ -86,6 +86,7 @@
     return MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
 }
 
+#if defined(MBEDTLS_ECP_WITH_MPI_UINT)
 int mbedtls_test_read_mpi_modulus(mbedtls_mpi_mod_modulus *N,
                                   const char *s,
                                   mbedtls_mpi_mod_rep_selector int_rep)
@@ -122,6 +123,7 @@
     mbedtls_free((mbedtls_mpi_uint *) N->p);
     mbedtls_mpi_mod_modulus_free(N);
 }
+#endif /* MBEDTLS_ECP_WITH_MPI_UINT */
 
 int mbedtls_test_read_mpi(mbedtls_mpi *X, const char *s)
 {
diff --git a/tests/suites/test_suite_bignum_mod.function b/tests/suites/test_suite_bignum_mod.function
index eaf2bd5..9d0fe93 100644
--- a/tests/suites/test_suite_bignum_mod.function
+++ b/tests/suites/test_suite_bignum_mod.function
@@ -35,7 +35,7 @@
 /* END_HEADER */
 
 /* BEGIN_DEPENDENCIES
- * depends_on:MBEDTLS_BIGNUM_C
+ * depends_on:MBEDTLS_BIGNUM_C:MBEDTLS_ECP_WITH_MPI_UINT
  * END_DEPENDENCIES
  */
 
diff --git a/tests/suites/test_suite_bignum_mod_raw.function b/tests/suites/test_suite_bignum_mod_raw.function
index 6b953f5..f7f8a59 100644
--- a/tests/suites/test_suite_bignum_mod_raw.function
+++ b/tests/suites/test_suite_bignum_mod_raw.function
@@ -11,7 +11,7 @@
 /* END_HEADER */
 
 /* BEGIN_DEPENDENCIES
- * depends_on:MBEDTLS_BIGNUM_C
+ * depends_on:MBEDTLS_BIGNUM_C:MBEDTLS_ECP_WITH_MPI_UINT
  * END_DEPENDENCIES
  */
 
diff --git a/tests/suites/test_suite_bignum_random.function b/tests/suites/test_suite_bignum_random.function
index 6e533bc..b43b1e7 100644
--- a/tests/suites/test_suite_bignum_random.function
+++ b/tests/suites/test_suite_bignum_random.function
@@ -192,7 +192,7 @@
 }
 /* END_CASE */
 
-/* BEGIN_CASE */
+/* BEGIN_CASE depends_on:MBEDTLS_ECP_WITH_MPI_UINT */
 void mpi_mod_random_values(int min, char *max_hex, int rep)
 {
     /* Same RNG as in mpi_core_random_basic */
@@ -403,7 +403,7 @@
 }
 /* END_CASE */
 
-/* BEGIN_CASE */
+/* BEGIN_CASE depends_on:MBEDTLS_ECP_WITH_MPI_UINT */
 void mpi_mod_random_validation(int min, char *bound_hex,
                                int result_limbs_delta,
                                int expected_ret)
diff --git a/tests/suites/test_suite_platform.data b/tests/suites/test_suite_platform.data
index 4276b8f..4d57450 100644
--- a/tests/suites/test_suite_platform.data
+++ b/tests/suites/test_suite_platform.data
@@ -4,3 +4,6 @@
 
 Time: get seconds
 time_get_seconds:
+
+Check mbedtls_calloc overallocation
+check_mbedtls_calloc_overallocation:SIZE_MAX/2:SIZE_MAX/2
diff --git a/tests/suites/test_suite_platform.function b/tests/suites/test_suite_platform.function
index 61681b8..c65d011 100644
--- a/tests/suites/test_suite_platform.function
+++ b/tests/suites/test_suite_platform.function
@@ -120,3 +120,17 @@
     goto exit;
 }
 /* END_CASE */
+
+/* BEGIN_CASE */
+void check_mbedtls_calloc_overallocation(intmax_t num, intmax_t size)
+{
+    unsigned char *buf;
+    buf = mbedtls_calloc((size_t) num, (size_t) size);
+    /* Dummy usage of the pointer to prevent optimizing it */
+    mbedtls_printf("calloc pointer : %p\n", buf);
+    TEST_ASSERT(buf == NULL);
+
+exit:
+    mbedtls_free(buf);
+}
+/* END_CASE */
diff --git a/tests/suites/test_suite_psa_crypto_low_hash.function b/tests/suites/test_suite_psa_crypto_low_hash.function
new file mode 100644
index 0000000..6dabcef
--- /dev/null
+++ b/tests/suites/test_suite_psa_crypto_low_hash.function
@@ -0,0 +1,209 @@
+/* BEGIN_HEADER */
+/*
+ * Test suite for the PSA hash built-in driver
+ *
+ * This test suite exercises some aspects of the built-in PSA driver for
+ * hash algorithms (psa_crypto_hash.c). This code is mostly tested via
+ * the application interface (above the PSA API layer) and via tests of
+ * individual hash modules. The goal of this test suite is to ensure that
+ * the driver dispatch layer behaves correctly even when not invoked via
+ * the API layer, but directly from another driver.
+ *
+ * This test suite is currently incomplete. It focuses on non-regression
+ * tests for past bugs or near misses.
+ */
+
+#include <psa_crypto_hash.h>
+
+/* END_HEADER */
+
+/* BEGIN_DEPENDENCIES
+ * depends_on:MBEDTLS_PSA_BUILTIN_HASH
+ * END_DEPENDENCIES
+ */
+
+/* BEGIN_CASE */
+void hash_valid_one_shot(int alg_arg, data_t *input,
+                         data_t *expected)
+{
+    psa_algorithm_t alg = alg_arg;
+    uint8_t *output = NULL;
+    size_t output_size = expected->len;
+    size_t length = SIZE_MAX;
+
+    /* Nominal case */
+    ASSERT_ALLOC(output, output_size);
+    TEST_EQUAL(mbedtls_psa_hash_compute(alg, input->x, input->len,
+                                        output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected->x, expected->len, output, length);
+    mbedtls_free(output);
+    output = NULL;
+
+    /* Larger output buffer */
+    output_size = expected->len + 1;
+    ASSERT_ALLOC(output, output_size);
+    TEST_EQUAL(mbedtls_psa_hash_compute(alg, input->x, input->len,
+                                        output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected->x, expected->len, output, length);
+    mbedtls_free(output);
+    output = NULL;
+
+    /* We don't test with a smaller output buffer because this isn't
+     * guaranteed to work: the core must pass a sufficiently large
+     * output buffer to the driver. */
+
+exit:
+    mbedtls_free(output);
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
+void hash_valid_multipart(int alg_arg,
+                          data_t *input1, data_t *expected1,
+                          data_t *input2, data_t *expected2)
+{
+    psa_algorithm_t alg = alg_arg;
+    uint8_t *output = NULL;
+    size_t output_size = expected1->len;
+    size_t length = SIZE_MAX;
+    mbedtls_psa_hash_operation_t operation0; // original
+    memset(&operation0, 0, sizeof(operation0));
+    mbedtls_psa_hash_operation_t clone_start; // cloned after setup
+    memset(&clone_start, 0, sizeof(clone_start));
+    mbedtls_psa_hash_operation_t clone_middle; // cloned between updates
+    memset(&clone_middle, 0, sizeof(clone_middle));
+    mbedtls_psa_hash_operation_t clone_end; // cloned before finish
+    memset(&clone_end, 0, sizeof(clone_end));
+    mbedtls_psa_hash_operation_t clone_more; // cloned before finish
+    memset(&clone_more, 0, sizeof(clone_more));
+
+    /* Nominal case with two update calls */
+    ASSERT_ALLOC(output, output_size);
+    TEST_EQUAL(mbedtls_psa_hash_setup(&operation0, alg),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_clone(&operation0, &clone_start),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_update(&operation0, input1->x, input1->len),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_clone(&operation0, &clone_middle),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_update(&operation0, input2->x, input2->len),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_clone(&operation0, &clone_end),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_finish(&operation0,
+                                       output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected2->x, expected2->len, output, length);
+
+    /* Nominal case with an operation cloned after setup */
+    memset(output, 0, output_size);
+    TEST_EQUAL(mbedtls_psa_hash_update(&clone_start, input1->x, input1->len),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_finish(&clone_start,
+                                       output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected1->x, expected1->len, output, length);
+
+    /* Nominal case with an operation cloned between updates */
+    memset(output, 0, output_size);
+    TEST_EQUAL(mbedtls_psa_hash_update(&clone_middle, input2->x, input2->len),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_finish(&clone_middle,
+                                       output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected2->x, expected2->len, output, length);
+
+    /* Nominal case with an operation cloned before finish */
+    TEST_EQUAL(mbedtls_psa_hash_clone(&clone_end, &clone_more),
+               PSA_SUCCESS);
+    memset(output, 0, output_size);
+    TEST_EQUAL(mbedtls_psa_hash_finish(&clone_end,
+                                       output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected2->x, expected2->len, output, length);
+    mbedtls_free(output);
+    output = NULL;
+
+    /* Larger output buffer */
+    TEST_EQUAL(mbedtls_psa_hash_clone(&clone_more, &clone_end),
+               PSA_SUCCESS);
+    output_size = expected2->len + 1;
+    ASSERT_ALLOC(output, output_size);
+    TEST_EQUAL(mbedtls_psa_hash_finish(&clone_end,
+                                       output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected2->x, expected2->len, output, length);
+    mbedtls_free(output);
+    output = NULL;
+
+    /* We don't test with a smaller output buffer because this isn't
+     * guaranteed to work: the core must pass a sufficiently large
+     * output buffer to the driver. */
+
+    /* Nominal case again after an error in a cloned operation */
+    output_size = expected2->len;
+    ASSERT_ALLOC(output, output_size);
+    TEST_EQUAL(mbedtls_psa_hash_finish(&clone_more,
+                                       output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected2->x, expected2->len, output, length);
+    mbedtls_free(output);
+    output = NULL;
+
+exit:
+    mbedtls_free(output);
+    mbedtls_psa_hash_abort(&operation0);
+    mbedtls_psa_hash_abort(&clone_start);
+    mbedtls_psa_hash_abort(&clone_middle);
+    mbedtls_psa_hash_abort(&clone_end);
+    mbedtls_psa_hash_abort(&clone_more);
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
+void hash_empty(int alg_arg, data_t *expected)
+{
+    psa_algorithm_t alg = alg_arg;
+    uint8_t *output = NULL;
+    size_t output_size = expected->len;
+    size_t length = SIZE_MAX;
+    mbedtls_psa_hash_operation_t operation;
+    memset(&operation, 0, sizeof(operation));
+
+    ASSERT_ALLOC(output, output_size);
+
+    /* One-shot */
+    TEST_EQUAL(mbedtls_psa_hash_compute(alg, NULL, 0,
+                                        output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected->x, expected->len, output, length);
+
+    /* Multipart, no update */
+    memset(output, 0, output_size);
+    TEST_EQUAL(mbedtls_psa_hash_setup(&operation, alg),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_finish(&operation,
+                                       output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected->x, expected->len, output, length);
+
+    /* Multipart, one update */
+    memset(output, 0, output_size);
+    memset(&operation, 0, sizeof(operation));
+    TEST_EQUAL(mbedtls_psa_hash_setup(&operation, alg),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_update(&operation, NULL, 0),
+               PSA_SUCCESS);
+    TEST_EQUAL(mbedtls_psa_hash_finish(&operation,
+                                       output, output_size, &length),
+               PSA_SUCCESS);
+    ASSERT_COMPARE(expected->x, expected->len, output, length);
+
+exit:
+    mbedtls_free(output);
+    mbedtls_psa_hash_abort(&operation);
+}
+/* END_CASE */