diff --git a/components/service/crypto/client/cpp/component.cmake b/components/service/crypto/client/cpp/component.cmake
new file mode 100644
index 0000000..18b83e9
--- /dev/null
+++ b/components/service/crypto/client/cpp/component.cmake
@@ -0,0 +1,22 @@
+#-------------------------------------------------------------------------------
+# Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+#-------------------------------------------------------------------------------
+if (NOT DEFINED TGT)
+	message(FATAL_ERROR "mandatory parameter TGT is not defined.")
+endif()
+
+target_sources(${TGT} PRIVATE
+	"${CMAKE_CURRENT_LIST_DIR}/crypto_client.cpp"
+	)
+
+# The crypto client presents the PSA Crypto API and hence has a dependency on mbedcrypto for functions
+# related to setting key attributes.  A minimal configuration is provided to allow a minimal library
+# to be built.  This configuration may be overridden by other components that have their own
+# dependency on mbedctupto.
+set(MBEDCRYPTO_CONFIG_FILE
+	"${CMAKE_CURRENT_LIST_DIR}/config_mbed_crypto.h"
+	CACHE STRING "Configuration file for mbedcrypto")
+
diff --git a/components/service/crypto/client/cpp/config_mbed_crypto.h b/components/service/crypto/client/cpp/config_mbed_crypto.h
new file mode 100644
index 0000000..d3c2a73
--- /dev/null
+++ b/components/service/crypto/client/cpp/config_mbed_crypto.h
@@ -0,0 +1,1955 @@
+/*
+ * Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef CONFIG_MBED_CRYPTO_H
+#define CONFIG_MBED_CRYPTO_H
+
+/**
+ * Defines the configuration to use when the crypto_client
+ * component is used in a deployment.
+ */
+
+/**
+ * \name SECTION: System support
+ *
+ * This section sets system specific settings.
+ * \{
+ */
+
+/**
+ * \def MBEDTLS_HAVE_ASM
+ *
+ * The compiler has support for asm().
+ *
+ * Requires support for asm() in compiler.
+ *
+ * Used in:
+ *      library/aria.c
+ *      library/timing.c
+ *      include/mbedtls/bn_mul.h
+ *
+ * Required by:
+ *      MBEDTLS_AESNI_C
+ *      MBEDTLS_PADLOCK_C
+ *
+ * Comment to disable the use of assembly code.
+ */
+#define MBEDTLS_HAVE_ASM
+
+/**
+ * \def MBEDTLS_NO_UDBL_DIVISION
+ *
+ * The platform lacks support for double-width integer division (64-bit
+ * division on a 32-bit platform, 128-bit division on a 64-bit platform).
+ *
+ * Used in:
+ *      include/mbedtls/bignum.h
+ *      library/bignum.c
+ *
+ * The bignum code uses double-width division to speed up some operations.
+ * Double-width division is often implemented in software that needs to
+ * be linked with the program. The presence of a double-width integer
+ * type is usually detected automatically through preprocessor macros,
+ * but the automatic detection cannot know whether the code needs to
+ * and can be linked with an implementation of division for that type.
+ * By default division is assumed to be usable if the type is present.
+ * Uncomment this option to prevent the use of double-width division.
+ *
+ * Note that division for the native integer type is always required.
+ * Furthermore, a 64-bit type is always required even on a 32-bit
+ * platform, but it need not support multiplication or division. In some
+ * cases it is also desirable to disable some double-width operations. For
+ * example, if double-width division is implemented in software, disabling
+ * it can reduce code size in some embedded targets.
+ */
+#define MBEDTLS_NO_UDBL_DIVISION
+
+/**
+ * \def MBEDTLS_NO_64BIT_MULTIPLICATION
+ *
+ * The platform lacks support for 32x32 -> 64-bit multiplication.
+ *
+ * Used in:
+ *      library/poly1305.c
+ *
+ * Some parts of the library may use multiplication of two unsigned 32-bit
+ * operands with a 64-bit result in order to speed up computations. On some
+ * platforms, this is not available in hardware and has to be implemented in
+ * software, usually in a library provided by the toolchain.
+ *
+ * Sometimes it is not desirable to have to link to that library. This option
+ * removes the dependency of that library on platforms that lack a hardware
+ * 64-bit multiplier by embedding a software implementation in Mbed TLS.
+ *
+ * Note that depending on the compiler, this may decrease performance compared
+ * to using the library function provided by the toolchain.
+ */
+//#define MBEDTLS_NO_64BIT_MULTIPLICATION
+
+/**
+ * \def MBEDTLS_HAVE_SSE2
+ *
+ * CPU supports SSE2 instruction set.
+ *
+ * Uncomment if the CPU supports SSE2 (IA-32 specific).
+ */
+//#define MBEDTLS_HAVE_SSE2
+
+/**
+ * \def MBEDTLS_HAVE_TIME
+ *
+ * System has time.h and time().
+ * The time does not need to be correct, only time differences are used,
+ * by contrast with MBEDTLS_HAVE_TIME_DATE
+ *
+ * Defining MBEDTLS_HAVE_TIME allows you to specify MBEDTLS_PLATFORM_TIME_ALT,
+ * MBEDTLS_PLATFORM_TIME_MACRO, MBEDTLS_PLATFORM_TIME_TYPE_MACRO and
+ * MBEDTLS_PLATFORM_STD_TIME.
+ *
+ * Comment if your system does not support time functions
+ */
+//#define MBEDTLS_HAVE_TIME
+
+/**
+ * \def MBEDTLS_HAVE_TIME_DATE
+ *
+ * System has time.h, time(), and an implementation for
+ * mbedtls_platform_gmtime_r() (see below).
+ * The time needs to be correct (not necessarily very accurate, but at least
+ * the date should be correct). This is used to verify the validity period of
+ * X.509 certificates.
+ *
+ * Comment if your system does not have a correct clock.
+ *
+ * \note mbedtls_platform_gmtime_r() is an abstraction in platform_util.h that
+ * behaves similarly to the gmtime_r() function from the C standard. Refer to
+ * the documentation for mbedtls_platform_gmtime_r() for more information.
+ *
+ * \note It is possible to configure an implementation for
+ * mbedtls_platform_gmtime_r() at compile-time by using the macro
+ * MBEDTLS_PLATFORM_GMTIME_R_ALT.
+ */
+//#define MBEDTLS_HAVE_TIME_DATE
+
+/**
+ * \def MBEDTLS_PLATFORM_MEMORY
+ *
+ * Enable the memory allocation layer.
+ *
+ * By default mbed TLS uses the system-provided calloc() and free().
+ * This allows different allocators (self-implemented or provided) to be
+ * provided to the platform abstraction layer.
+ *
+ * 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
+ * MBEDTLS_PLATFORM_{CALLOC,FREE}_MACROs will allow you to specify the
+ * alternate function at compile time.
+ *
+ * Requires: MBEDTLS_PLATFORM_C
+ *
+ * Enable this layer to allow use of alternative memory allocators.
+ */
+//#define MBEDTLS_PLATFORM_MEMORY
+
+/**
+ * \def MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
+ *
+ * Do not assign standard functions in the platform layer (e.g. calloc() to
+ * MBEDTLS_PLATFORM_STD_CALLOC and printf() to MBEDTLS_PLATFORM_STD_PRINTF)
+ *
+ * This makes sure there are no linking errors on platforms that do not support
+ * these functions. You will HAVE to provide alternatives, either at runtime
+ * via the platform_set_xxx() functions or at compile time by setting
+ * the MBEDTLS_PLATFORM_STD_XXX defines, or enabling a
+ * MBEDTLS_PLATFORM_XXX_MACRO.
+ *
+ * Requires: MBEDTLS_PLATFORM_C
+ *
+ * Uncomment to prevent default assignment of standard functions in the
+ * platform layer.
+ */
+//#define MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
+
+/**
+ * \def MBEDTLS_PLATFORM_EXIT_ALT
+ *
+ * MBEDTLS_PLATFORM_XXX_ALT: Uncomment a macro to let mbed TLS support the
+ * function in the platform abstraction layer.
+ *
+ * Example: In case you uncomment MBEDTLS_PLATFORM_PRINTF_ALT, mbed TLS will
+ * provide a function "mbedtls_platform_set_printf()" that allows you to set an
+ * alternative printf function pointer.
+ *
+ * All these define require MBEDTLS_PLATFORM_C to be defined!
+ *
+ * \note MBEDTLS_PLATFORM_SNPRINTF_ALT is required on Windows;
+ * it will be enabled automatically by check_config.h
+ *
+ * \warning MBEDTLS_PLATFORM_XXX_ALT cannot be defined at the same time as
+ * MBEDTLS_PLATFORM_XXX_MACRO!
+ *
+ * Requires: MBEDTLS_PLATFORM_TIME_ALT requires MBEDTLS_HAVE_TIME
+ *
+ * Uncomment a macro to enable alternate implementation of specific base
+ * platform function
+ */
+//#define MBEDTLS_PLATFORM_EXIT_ALT
+//#define MBEDTLS_PLATFORM_TIME_ALT
+//#define MBEDTLS_PLATFORM_FPRINTF_ALT
+//#define MBEDTLS_PLATFORM_PRINTF_ALT
+//#define MBEDTLS_PLATFORM_SNPRINTF_ALT
+//#define MBEDTLS_PLATFORM_VSNPRINTF_ALT
+//#define MBEDTLS_PLATFORM_NV_SEED_ALT
+//#define MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT
+
+/**
+ * \def MBEDTLS_DEPRECATED_WARNING
+ *
+ * Mark deprecated functions so that they generate a warning if used.
+ * Functions deprecated in one version will usually be removed in the next
+ * version. You can enable this to help you prepare the transition to a new
+ * major version by making sure your code is not using these functions.
+ *
+ * This only works with GCC and Clang. With other compilers, you may want to
+ * use MBEDTLS_DEPRECATED_REMOVED
+ *
+ * Uncomment to get warnings on using deprecated functions.
+ */
+//#define MBEDTLS_DEPRECATED_WARNING
+
+/**
+ * \def MBEDTLS_DEPRECATED_REMOVED
+ *
+ * Remove deprecated functions so that they generate an error if used.
+ * Functions deprecated in one version will usually be removed in the next
+ * version. You can enable this to help you prepare the transition to a new
+ * major version by making sure your code is not using these functions.
+ *
+ * Uncomment to get errors on using deprecated functions.
+ */
+//#define MBEDTLS_DEPRECATED_REMOVED
+
+/**
+ * \def MBEDTLS_CHECK_PARAMS
+ *
+ * This configuration option controls whether the library validates more of
+ * the parameters passed to it.
+ *
+ * When this flag is not defined, the library only attempts to validate an
+ * input parameter if: (1) they may come from the outside world (such as the
+ * network, the filesystem, etc.) or (2) not validating them could result in
+ * internal memory errors such as overflowing a buffer controlled by the
+ * library. On the other hand, it doesn't attempt to validate parameters whose
+ * values are fully controlled by the application (such as pointers).
+ *
+ * When this flag is defined, the library additionally attempts to validate
+ * parameters that are fully controlled by the application, and should always
+ * be valid if the application code is fully correct and trusted.
+ *
+ * For example, when a function accepts as input a pointer to a buffer that may
+ * contain untrusted data, and its documentation mentions that this pointer
+ * must not be NULL:
+ * - the pointer is checked to be non-NULL only if this option is enabled
+ * - the content of the buffer is always validated
+ *
+ * When this flag is defined, if a library function receives a parameter that
+ * is invalid, it will:
+ * - invoke the macro MBEDTLS_PARAM_FAILED() which by default expands to a
+ *   call to the function mbedtls_param_failed()
+ * - immediately return (with a specific error code unless the function
+ *   returns void and can't communicate an error).
+ *
+ * When defining this flag, you also need to:
+ * - either provide a definition of the function mbedtls_param_failed() in
+ *   your application (see platform_util.h for its prototype) as the library
+ *   calls that function, but does not provide a default definition for it,
+ * - or provide a different definition of the macro MBEDTLS_PARAM_FAILED()
+ *   below if the above mechanism is not flexible enough to suit your needs.
+ *   See the documentation of this macro later in this file.
+ *
+ * Uncomment to enable validation of application-controlled parameters.
+ */
+//#define MBEDTLS_CHECK_PARAMS
+
+/* \} name SECTION: System support */
+
+/**
+ * \name SECTION: mbed TLS feature support
+ *
+ * This section sets support for features that are or are not needed
+ * within the modules that are enabled.
+ * \{
+ */
+
+/**
+ * \def MBEDTLS_TIMING_ALT
+ *
+ * Uncomment to provide your own alternate implementation for mbedtls_timing_hardclock(),
+ * mbedtls_timing_get_timer(), mbedtls_set_alarm(), mbedtls_set/get_delay()
+ *
+ * Only works if you have MBEDTLS_TIMING_C enabled.
+ *
+ * You will need to provide a header "timing_alt.h" and an implementation at
+ * compile time.
+ */
+//#define MBEDTLS_TIMING_ALT
+
+/**
+ * \def MBEDTLS_AES_ALT
+ *
+ * MBEDTLS__MODULE_NAME__ALT: Uncomment a macro to let mbed TLS use your
+ * alternate core implementation of a symmetric crypto, an arithmetic or hash
+ * module (e.g. platform specific assembly optimized implementations). Keep
+ * in mind that the function prototypes should remain the same.
+ *
+ * This replaces the whole module. If you only want to replace one of the
+ * functions, use one of the MBEDTLS__FUNCTION_NAME__ALT flags.
+ *
+ * Example: In case you uncomment MBEDTLS_AES_ALT, mbed TLS will no longer
+ * provide the "struct mbedtls_aes_context" definition and omit the base
+ * function declarations and implementations. "aes_alt.h" will be included from
+ * "aes.h" to include the new function definitions.
+ *
+ * Uncomment a macro to enable alternate implementation of the corresponding
+ * module.
+ *
+ * \warning   MD2, MD4, MD5, ARC4, DES and SHA-1 are considered weak and their
+ *            use constitutes a security risk. If possible, we recommend
+ *            avoiding dependencies on them, and considering stronger message
+ *            digests and ciphers instead.
+ *
+ */
+//#define MBEDTLS_AES_ALT
+//#define MBEDTLS_ARC4_ALT
+//#define MBEDTLS_ARIA_ALT
+//#define MBEDTLS_BLOWFISH_ALT
+//#define MBEDTLS_CAMELLIA_ALT
+//#define MBEDTLS_CCM_ALT
+//#define MBEDTLS_CHACHA20_ALT
+//#define MBEDTLS_CHACHAPOLY_ALT
+//#define MBEDTLS_CMAC_ALT
+//#define MBEDTLS_DES_ALT
+//#define MBEDTLS_DHM_ALT
+//#define MBEDTLS_ECJPAKE_ALT
+//#define MBEDTLS_GCM_ALT
+//#define MBEDTLS_NIST_KW_ALT
+//#define MBEDTLS_MD2_ALT
+//#define MBEDTLS_MD4_ALT
+//#define MBEDTLS_MD5_ALT
+//#define MBEDTLS_POLY1305_ALT
+//#define MBEDTLS_RIPEMD160_ALT
+//#define MBEDTLS_RSA_ALT
+//#define MBEDTLS_SHA1_ALT
+//#define MBEDTLS_SHA256_ALT
+//#define MBEDTLS_SHA512_ALT
+//#define MBEDTLS_XTEA_ALT
+
+/*
+ * When replacing the elliptic curve module, pleace consider, that it is
+ * implemented with two .c files:
+ *      - ecp.c
+ *      - ecp_curves.c
+ * You can replace them very much like all the other MBEDTLS__MODULE_NAME__ALT
+ * macros as described above. The only difference is that you have to make sure
+ * that you provide functionality for both .c files.
+ */
+//#define MBEDTLS_ECP_ALT
+
+/**
+ * \def MBEDTLS_MD2_PROCESS_ALT
+ *
+ * MBEDTLS__FUNCTION_NAME__ALT: Uncomment a macro to let mbed TLS use you
+ * alternate core implementation of symmetric crypto or hash function. Keep in
+ * mind that function prototypes should remain the same.
+ *
+ * This replaces only one function. The header file from mbed TLS is still
+ * used, in contrast to the MBEDTLS__MODULE_NAME__ALT flags.
+ *
+ * Example: In case you uncomment MBEDTLS_SHA256_PROCESS_ALT, mbed TLS will
+ * no longer provide the mbedtls_sha1_process() function, but it will still provide
+ * the other function (using your mbedtls_sha1_process() function) and the definition
+ * of mbedtls_sha1_context, so your implementation of mbedtls_sha1_process must be compatible
+ * with this definition.
+ *
+ * \note Because of a signature change, the core AES encryption and decryption routines are
+ *       currently named mbedtls_aes_internal_encrypt and mbedtls_aes_internal_decrypt,
+ *       respectively. When setting up alternative implementations, these functions should
+ *       be overridden, but the wrapper functions mbedtls_aes_decrypt and mbedtls_aes_encrypt
+ *       must stay untouched.
+ *
+ * \note If you use the AES_xxx_ALT macros, then is is recommended to also set
+ *       MBEDTLS_AES_ROM_TABLES in order to help the linker garbage-collect the AES
+ *       tables.
+ *
+ * Uncomment a macro to enable alternate implementation of the corresponding
+ * function.
+ *
+ * \warning   MD2, MD4, MD5, DES and SHA-1 are considered weak and their use
+ *            constitutes a security risk. If possible, we recommend avoiding
+ *            dependencies on them, and considering stronger message digests
+ *            and ciphers instead.
+ *
+ */
+//#define MBEDTLS_MD2_PROCESS_ALT
+//#define MBEDTLS_MD4_PROCESS_ALT
+//#define MBEDTLS_MD5_PROCESS_ALT
+//#define MBEDTLS_RIPEMD160_PROCESS_ALT
+//#define MBEDTLS_SHA1_PROCESS_ALT
+//#define MBEDTLS_SHA256_PROCESS_ALT
+//#define MBEDTLS_SHA512_PROCESS_ALT
+//#define MBEDTLS_DES_SETKEY_ALT
+//#define MBEDTLS_DES_CRYPT_ECB_ALT
+//#define MBEDTLS_DES3_CRYPT_ECB_ALT
+//#define MBEDTLS_AES_SETKEY_ENC_ALT
+//#define MBEDTLS_AES_SETKEY_DEC_ALT
+//#define MBEDTLS_AES_ENCRYPT_ALT
+//#define MBEDTLS_AES_DECRYPT_ALT
+//#define MBEDTLS_ECDH_GEN_PUBLIC_ALT
+//#define MBEDTLS_ECDH_COMPUTE_SHARED_ALT
+//#define MBEDTLS_ECDSA_VERIFY_ALT
+//#define MBEDTLS_ECDSA_SIGN_ALT
+//#define MBEDTLS_ECDSA_GENKEY_ALT
+
+/**
+ * \def MBEDTLS_ECP_INTERNAL_ALT
+ *
+ * Expose a part of the internal interface of the Elliptic Curve Point module.
+ *
+ * MBEDTLS_ECP__FUNCTION_NAME__ALT: Uncomment a macro to let mbed TLS use your
+ * alternative core implementation of elliptic curve arithmetic. Keep in mind
+ * that function prototypes should remain the same.
+ *
+ * This partially replaces one function. The header file from mbed TLS is still
+ * used, in contrast to the MBEDTLS_ECP_ALT flag. The original implementation
+ * is still present and it is used for group structures not supported by the
+ * alternative.
+ *
+ * Any of these options become available by defining MBEDTLS_ECP_INTERNAL_ALT
+ * and implementing the following functions:
+ *      unsigned char mbedtls_internal_ecp_grp_capable(
+ *          const mbedtls_ecp_group *grp )
+ *      int  mbedtls_internal_ecp_init( const mbedtls_ecp_group *grp )
+ *      void mbedtls_internal_ecp_free( const mbedtls_ecp_group *grp )
+ * The mbedtls_internal_ecp_grp_capable function should return 1 if the
+ * replacement functions implement arithmetic for the given group and 0
+ * otherwise.
+ * The functions mbedtls_internal_ecp_init and mbedtls_internal_ecp_free are
+ * called before and after each point operation and provide an opportunity to
+ * implement optimized set up and tear down instructions.
+ *
+ * Example: In case you uncomment MBEDTLS_ECP_INTERNAL_ALT and
+ * MBEDTLS_ECP_DOUBLE_JAC_ALT, mbed TLS will still provide the ecp_double_jac
+ * function, but will use your mbedtls_internal_ecp_double_jac if the group is
+ * supported (your mbedtls_internal_ecp_grp_capable function returns 1 when
+ * receives it as an argument). If the group is not supported then the original
+ * implementation is used. The other functions and the definition of
+ * mbedtls_ecp_group and mbedtls_ecp_point will not change, so your
+ * implementation of mbedtls_internal_ecp_double_jac and
+ * mbedtls_internal_ecp_grp_capable must be compatible with this definition.
+ *
+ * Uncomment a macro to enable alternate implementation of the corresponding
+ * function.
+ */
+/* Required for all the functions in this section */
+//#define MBEDTLS_ECP_INTERNAL_ALT
+/* Support for Weierstrass curves with Jacobi representation */
+//#define MBEDTLS_ECP_RANDOMIZE_JAC_ALT
+//#define MBEDTLS_ECP_ADD_MIXED_ALT
+//#define MBEDTLS_ECP_DOUBLE_JAC_ALT
+//#define MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT
+//#define MBEDTLS_ECP_NORMALIZE_JAC_ALT
+/* Support for curves with Montgomery arithmetic */
+//#define MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT
+//#define MBEDTLS_ECP_RANDOMIZE_MXZ_ALT
+//#define MBEDTLS_ECP_NORMALIZE_MXZ_ALT
+
+/**
+ * \def MBEDTLS_TEST_NULL_ENTROPY
+ *
+ * Enables testing and use of mbed TLS without any configured entropy sources.
+ * This permits use of the library on platforms before an entropy source has
+ * been integrated (see for example the MBEDTLS_ENTROPY_HARDWARE_ALT or the
+ * MBEDTLS_ENTROPY_NV_SEED switches).
+ *
+ * WARNING! This switch MUST be disabled in production builds, and is suitable
+ * only for development.
+ * Enabling the switch negates any security provided by the library.
+ *
+ * Requires MBEDTLS_ENTROPY_C, MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
+ *
+ */
+#define MBEDTLS_TEST_NULL_ENTROPY
+
+/**
+ * \def MBEDTLS_ENTROPY_HARDWARE_ALT
+ *
+ * Uncomment this macro to let mbed TLS use your own implementation of a
+ * hardware entropy collector.
+ *
+ * Your function must be called \c mbedtls_hardware_poll(), have the same
+ * prototype as declared in entropy_poll.h, and accept NULL as first argument.
+ *
+ * Uncomment to use your own hardware entropy collector.
+ */
+//#define MBEDTLS_ENTROPY_HARDWARE_ALT
+
+/**
+ * \def MBEDTLS_AES_ROM_TABLES
+ *
+ * Use precomputed AES tables stored in ROM.
+ *
+ * Uncomment this macro to use precomputed AES tables stored in ROM.
+ * Comment this macro to generate AES tables in RAM at runtime.
+ *
+ * Tradeoff: Using precomputed ROM tables reduces RAM usage by ~8kb
+ * (or ~2kb if \c MBEDTLS_AES_FEWER_TABLES is used) and reduces the
+ * initialization time before the first AES operation can be performed.
+ * It comes at the cost of additional ~8kb ROM use (resp. ~2kb if \c
+ * MBEDTLS_AES_FEWER_TABLES below is used), and potentially degraded
+ * performance if ROM access is slower than RAM access.
+ *
+ * This option is independent of \c MBEDTLS_AES_FEWER_TABLES.
+ *
+ */
+//#define MBEDTLS_AES_ROM_TABLES
+
+/**
+ * \def MBEDTLS_AES_FEWER_TABLES
+ *
+ * Use less ROM/RAM for AES tables.
+ *
+ * Uncommenting this macro omits 75% of the AES tables from
+ * ROM / RAM (depending on the value of \c MBEDTLS_AES_ROM_TABLES)
+ * by computing their values on the fly during operations
+ * (the tables are entry-wise rotations of one another).
+ *
+ * Tradeoff: Uncommenting this reduces the RAM / ROM footprint
+ * by ~6kb but at the cost of more arithmetic operations during
+ * runtime. Specifically, one has to compare 4 accesses within
+ * different tables to 4 accesses with additional arithmetic
+ * operations within the same table. The performance gain/loss
+ * depends on the system and memory details.
+ *
+ * This option is independent of \c MBEDTLS_AES_ROM_TABLES.
+ *
+ */
+//#define MBEDTLS_AES_FEWER_TABLES
+
+/**
+ * \def MBEDTLS_CAMELLIA_SMALL_MEMORY
+ *
+ * Use less ROM for the Camellia implementation (saves about 768 bytes).
+ *
+ * Uncomment this macro to use less memory for Camellia.
+ */
+//#define MBEDTLS_CAMELLIA_SMALL_MEMORY
+
+/**
+ * \def MBEDTLS_CIPHER_MODE_CBC
+ *
+ * Enable Cipher Block Chaining mode (CBC) for symmetric ciphers.
+ */
+#define MBEDTLS_CIPHER_MODE_CBC
+
+/**
+ * \def MBEDTLS_CIPHER_MODE_CFB
+ *
+ * Enable Cipher Feedback mode (CFB) for symmetric ciphers.
+ */
+#define MBEDTLS_CIPHER_MODE_CFB
+
+/**
+ * \def MBEDTLS_CIPHER_MODE_CTR
+ *
+ * Enable Counter Block Cipher mode (CTR) for symmetric ciphers.
+ */
+#define MBEDTLS_CIPHER_MODE_CTR
+
+/**
+ * \def MBEDTLS_CIPHER_MODE_OFB
+ *
+ * Enable Output Feedback mode (OFB) for symmetric ciphers.
+ */
+#define MBEDTLS_CIPHER_MODE_OFB
+
+/**
+ * \def MBEDTLS_CIPHER_MODE_XTS
+ *
+ * Enable Xor-encrypt-xor with ciphertext stealing mode (XTS) for AES.
+ */
+#define MBEDTLS_CIPHER_MODE_XTS
+
+/**
+ * \def MBEDTLS_CIPHER_NULL_CIPHER
+ *
+ * Enable NULL cipher.
+ * Warning: Only do so when you know what you are doing. This allows for
+ * encryption or channels without any security!
+ *
+ * This module is required to support the TLS ciphersuites that use the NULL
+ * cipher.
+ *
+ * Uncomment this macro to enable the NULL cipher
+ */
+//#define MBEDTLS_CIPHER_NULL_CIPHER
+
+/**
+ * \def MBEDTLS_CIPHER_PADDING_PKCS7
+ *
+ * MBEDTLS_CIPHER_PADDING_XXX: Uncomment or comment macros to add support for
+ * specific padding modes in the cipher layer with cipher modes that support
+ * padding (e.g. CBC)
+ *
+ * If you disable all padding modes, only full blocks can be used with CBC.
+ *
+ * Enable padding modes in the cipher layer.
+ */
+#define MBEDTLS_CIPHER_PADDING_PKCS7
+#define MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS
+#define MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN
+#define MBEDTLS_CIPHER_PADDING_ZEROS
+
+/**
+ * \def MBEDTLS_ECP_DP_SECP192R1_ENABLED
+ *
+ * MBEDTLS_ECP_XXXX_ENABLED: Enables specific curves within the Elliptic Curve
+ * module.  By default all supported curves are enabled.
+ *
+ * Comment macros to disable the curve and functions for it
+ */
+#define MBEDTLS_ECP_DP_SECP192R1_ENABLED
+#define MBEDTLS_ECP_DP_SECP224R1_ENABLED
+#define MBEDTLS_ECP_DP_SECP256R1_ENABLED
+#define MBEDTLS_ECP_DP_SECP384R1_ENABLED
+#define MBEDTLS_ECP_DP_SECP521R1_ENABLED
+#define MBEDTLS_ECP_DP_SECP192K1_ENABLED
+#define MBEDTLS_ECP_DP_SECP224K1_ENABLED
+#define MBEDTLS_ECP_DP_SECP256K1_ENABLED
+#define MBEDTLS_ECP_DP_BP256R1_ENABLED
+#define MBEDTLS_ECP_DP_BP384R1_ENABLED
+#define MBEDTLS_ECP_DP_BP512R1_ENABLED
+#define MBEDTLS_ECP_DP_CURVE25519_ENABLED
+#define MBEDTLS_ECP_DP_CURVE448_ENABLED
+
+/**
+ * \def MBEDTLS_ECP_NIST_OPTIM
+ *
+ * Enable specific 'modulo p' routines for each NIST prime.
+ * Depending on the prime and architecture, makes operations 4 to 8 times
+ * faster on the corresponding curve.
+ *
+ * Comment this macro to disable NIST curves optimisation.
+ */
+#define MBEDTLS_ECP_NIST_OPTIM
+
+/**
+ * \def MBEDTLS_ECP_RESTARTABLE
+ *
+ * Enable "non-blocking" ECC operations that can return early and be resumed.
+ *
+ * This allows various functions to pause by returning
+ * #MBEDTLS_ERR_ECP_IN_PROGRESS (or, for functions in Mbed TLS's SSL module,
+ * MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) and then be called later again in order
+ * to further progress and eventually complete their operation. This is
+ * controlled through mbedtls_ecp_set_max_ops() which limits the maximum number
+ * of ECC operations a function may perform before pausing; see
+ * mbedtls_ecp_set_max_ops() for more information.
+ *
+ * This is useful in non-threaded environments if you want to avoid blocking
+ * for too long on ECC (and, hence, X.509 or SSL/TLS) operations.
+ *
+ * Uncomment this macro to enable restartable ECC computations.
+ *
+ * \note  This option only works with the default software implementation of
+ *        elliptic curve functionality. It is incompatible with
+ *        MBEDTLS_ECP_ALT, MBEDTLS_ECDH_XXX_ALT and MBEDTLS_ECDSA_XXX_ALT.
+ */
+//#define MBEDTLS_ECP_RESTARTABLE
+
+/**
+ * \def MBEDTLS_ECDSA_DETERMINISTIC
+ *
+ * Enable deterministic ECDSA (RFC 6979).
+ * Standard ECDSA is "fragile" in the sense that lack of entropy when signing
+ * may result in a compromise of the long-term signing key. This is avoided by
+ * the deterministic variant.
+ *
+ * Requires: MBEDTLS_HMAC_DRBG_C
+ *
+ * Comment this macro to disable deterministic ECDSA.
+ */
+#define MBEDTLS_ECDSA_DETERMINISTIC
+
+/**
+ * \def MBEDTLS_PK_PARSE_EC_EXTENDED
+ *
+ * Enhance support for reading EC keys using variants of SEC1 not allowed by
+ * RFC 5915 and RFC 5480.
+ *
+ * Currently this means parsing the SpecifiedECDomain choice of EC
+ * parameters (only known groups are supported, not arbitrary domains, to
+ * avoid validation issues).
+ *
+ * Disable if you only need to support RFC 5915 + 5480 key formats.
+ */
+#define MBEDTLS_PK_PARSE_EC_EXTENDED
+
+/**
+ * \def MBEDTLS_ERROR_STRERROR_DUMMY
+ *
+ * Enable a dummy error function to make use of mbedtls_strerror() in
+ * third party libraries easier when MBEDTLS_ERROR_C is disabled
+ * (no effect when MBEDTLS_ERROR_C is enabled).
+ *
+ * You can safely disable this if MBEDTLS_ERROR_C is enabled, or if you're
+ * not using mbedtls_strerror() or error_strerror() in your application.
+ *
+ * Disable if you run into name conflicts and want to really remove the
+ * mbedtls_strerror()
+ */
+#define MBEDTLS_ERROR_STRERROR_DUMMY
+
+/**
+ * \def MBEDTLS_GENPRIME
+ *
+ * Enable the prime-number generation code.
+ *
+ * Requires: MBEDTLS_BIGNUM_C
+ */
+#define MBEDTLS_GENPRIME
+
+/**
+ * \def MBEDTLS_FS_IO
+ *
+ * Enable functions that use the filesystem.
+ */
+//#define MBEDTLS_FS_IO
+
+/**
+ * \def MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
+ *
+ * Do not add default entropy sources. These are the platform specific,
+ * mbedtls_timing_hardclock and HAVEGE based poll functions.
+ *
+ * This is useful to have more control over the added entropy sources in an
+ * application.
+ *
+ * Uncomment this macro to prevent loading of default entropy functions.
+ */
+#define MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
+
+/**
+ * \def MBEDTLS_NO_PLATFORM_ENTROPY
+ *
+ * Do not use built-in platform entropy functions.
+ * This is useful if your platform does not support
+ * standards like the /dev/urandom or Windows CryptoAPI.
+ *
+ * Uncomment this macro to disable the built-in platform entropy functions.
+ */
+#define MBEDTLS_NO_PLATFORM_ENTROPY
+
+/**
+ * \def MBEDTLS_ENTROPY_FORCE_SHA256
+ *
+ * Force the entropy accumulator to use a SHA-256 accumulator instead of the
+ * default SHA-512 based one (if both are available).
+ *
+ * Requires: MBEDTLS_SHA256_C
+ *
+ * On 32-bit systems SHA-256 can be much faster than SHA-512. Use this option
+ * if you have performance concerns.
+ *
+ * This option is only useful if both MBEDTLS_SHA256_C and
+ * MBEDTLS_SHA512_C are defined. Otherwise the available hash module is used.
+ */
+//#define MBEDTLS_ENTROPY_FORCE_SHA256
+
+/**
+ * \def MBEDTLS_ENTROPY_NV_SEED
+ *
+ * Enable the non-volatile (NV) seed file-based entropy source.
+ * (Also enables the NV seed read/write functions in the platform layer)
+ *
+ * This is crucial (if not required) on systems that do not have a
+ * cryptographic entropy source (in hardware or kernel) available.
+ *
+ * Requires: MBEDTLS_ENTROPY_C, MBEDTLS_PLATFORM_C
+ *
+ * \note The read/write functions that are used by the entropy source are
+ *       determined in the platform layer, and can be modified at runtime and/or
+ *       compile-time depending on the flags (MBEDTLS_PLATFORM_NV_SEED_*) used.
+ *
+ * \note If you use the default implementation functions that read a seedfile
+ *       with regular fopen(), please make sure you make a seedfile with the
+ *       proper name (defined in MBEDTLS_PLATFORM_STD_NV_SEED_FILE) and at
+ *       least MBEDTLS_ENTROPY_BLOCK_SIZE bytes in size that can be read from
+ *       and written to or you will get an entropy source error! The default
+ *       implementation will only use the first MBEDTLS_ENTROPY_BLOCK_SIZE
+ *       bytes from the file.
+ *
+ * \note The entropy collector will write to the seed file before entropy is
+ *       given to an external source, to update it.
+ */
+//#define MBEDTLS_ENTROPY_NV_SEED
+
+/* MBEDTLS_PSA_CRYPTO_KEY_FILE_ID_ENCODES_OWNER
+ *
+ * In PSA key storage, encode the owner of the key.
+ *
+ * This is only meaningful when building the library as part of a
+ * multi-client service. When you activate this option, you must provide
+ * an implementation of the type psa_key_owner_id_t and a translation
+ * from psa_key_file_id_t to file name in all the storage backends that
+ * you wish to support.
+ *
+ * Note that this option is meant for internal use only and may be removed
+ * without notice.
+ */
+//#define MBEDTLS_PSA_CRYPTO_KEY_FILE_ID_ENCODES_OWNER
+
+/**
+ * \def MBEDTLS_MEMORY_DEBUG
+ *
+ * Enable debugging of buffer allocator memory issues. Automatically prints
+ * (to stderr) all (fatal) messages on memory allocation issues. Enables
+ * function for 'debug output' of allocated memory.
+ *
+ * Requires: MBEDTLS_MEMORY_BUFFER_ALLOC_C
+ *
+ * Uncomment this macro to let the buffer allocator print out error messages.
+ */
+//#define MBEDTLS_MEMORY_DEBUG
+
+/**
+ * \def MBEDTLS_MEMORY_BACKTRACE
+ *
+ * Include backtrace information with each allocated block.
+ *
+ * Requires: MBEDTLS_MEMORY_BUFFER_ALLOC_C
+ *           GLIBC-compatible backtrace() an backtrace_symbols() support
+ *
+ * Uncomment this macro to include backtrace information
+ */
+//#define MBEDTLS_MEMORY_BACKTRACE
+
+/**
+ * \def MBEDTLS_PK_RSA_ALT_SUPPORT
+ *
+ * Support external private RSA keys (eg from a HSM) in the PK layer.
+ *
+ * Comment this macro to disable support for external private RSA keys.
+ */
+#define MBEDTLS_PK_RSA_ALT_SUPPORT
+
+/**
+ * \def MBEDTLS_PKCS1_V15
+ *
+ * Enable support for PKCS#1 v1.5 encoding.
+ *
+ * Requires: MBEDTLS_RSA_C
+ *
+ * This enables support for PKCS#1 v1.5 operations.
+ */
+#define MBEDTLS_PKCS1_V15
+
+/**
+ * \def MBEDTLS_PKCS1_V21
+ *
+ * Enable support for PKCS#1 v2.1 encoding.
+ *
+ * Requires: MBEDTLS_MD_C, MBEDTLS_RSA_C
+ *
+ * This enables support for RSAES-OAEP and RSASSA-PSS operations.
+ */
+#define MBEDTLS_PKCS1_V21
+
+/**
+ * \def MBEDTLS_PSA_CRYPTO_SPM
+ *
+ * When MBEDTLS_PSA_CRYPTO_SPM is defined, the code is built for SPM (Secure
+ * Partition Manager) integration which separates the code into two parts: a
+ * NSPE (Non-Secure Process Environment) and an SPE (Secure Process
+ * Environment).
+ *
+ * Module:  library/psa_crypto.c
+ * Requires: MBEDTLS_PSA_CRYPTO_C
+ *
+ */
+//#define MBEDTLS_PSA_CRYPTO_SPM
+
+/**
+ * \def MBEDTLS_PSA_INJECT_ENTROPY
+ *
+ * Enable support for entropy injection at first boot. This feature is
+ * required on systems that do not have a built-in entropy source (TRNG).
+ * This feature is currently not supported on systems that have a built-in
+ * entropy source.
+ *
+ * Requires: MBEDTLS_PSA_CRYPTO_STORAGE_C, MBEDTLS_ENTROPY_NV_SEED
+ *
+ */
+//#define MBEDTLS_PSA_INJECT_ENTROPY
+
+/**
+ * \def MBEDTLS_RSA_NO_CRT
+ *
+ * Do not use the Chinese Remainder Theorem
+ * for the RSA private operation.
+ *
+ * Uncomment this macro to disable the use of CRT in RSA.
+ *
+ */
+//#define MBEDTLS_RSA_NO_CRT
+
+/**
+ * \def MBEDTLS_SELF_TEST
+ *
+ * Enable the checkup functions (*_self_test).
+ */
+//#define MBEDTLS_SELF_TEST
+
+/**
+ * \def MBEDTLS_SHA256_SMALLER
+ *
+ * Enable an implementation of SHA-256 that has lower ROM footprint but also
+ * lower performance.
+ *
+ * The default implementation is meant to be a reasonnable compromise between
+ * performance and size. This version optimizes more aggressively for size at
+ * the expense of performance. Eg on Cortex-M4 it reduces the size of
+ * mbedtls_sha256_process() from ~2KB to ~0.5KB for a performance hit of about
+ * 30%.
+ *
+ * Uncomment to enable the smaller implementation of SHA256.
+ */
+//#define MBEDTLS_SHA256_SMALLER
+
+/**
+ * \def MBEDTLS_THREADING_ALT
+ *
+ * Provide your own alternate threading implementation.
+ *
+ * Requires: MBEDTLS_THREADING_C
+ *
+ * Uncomment this to allow your own alternate threading implementation.
+ */
+//#define MBEDTLS_THREADING_ALT
+
+/**
+ * \def MBEDTLS_THREADING_PTHREAD
+ *
+ * Enable the pthread wrapper layer for the threading layer.
+ *
+ * Requires: MBEDTLS_THREADING_C
+ *
+ * Uncomment this to enable pthread mutexes.
+ */
+//#define MBEDTLS_THREADING_PTHREAD
+
+/**
+ * \def MBEDTLS_USE_PSA_CRYPTO
+ *
+ * Make the X.509 and TLS library use PSA for cryptographic operations, see
+ * #MBEDTLS_PSA_CRYPTO_C.
+ *
+ * Note: this option is still in progress, the full X.509 and TLS modules are
+ * not covered yet, but parts that are not ported to PSA yet will still work
+ * as usual, so enabling this option should not break backwards compatibility.
+ *
+ * \warning  Support for PSA is still an experimental feature.
+ *           Any public API that depends on this option may change
+ *           at any time until this warning is removed.
+ *
+ * Requires: MBEDTLS_PSA_CRYPTO_C.
+ */
+//#define MBEDTLS_USE_PSA_CRYPTO
+
+/**
+ * \def MBEDTLS_VERSION_FEATURES
+ *
+ * Allow run-time checking of compile-time enabled features. Thus allowing users
+ * to check at run-time if the library is for instance compiled with threading
+ * support via mbedtls_version_check_feature().
+ *
+ * Requires: MBEDTLS_VERSION_C
+ *
+ * Comment this to disable run-time checking and save ROM space
+ */
+#define MBEDTLS_VERSION_FEATURES
+
+/* \} name SECTION: mbed TLS feature support */
+
+/**
+ * \name SECTION: mbed TLS modules
+ *
+ * This section enables or disables entire modules in mbed TLS
+ * \{
+ */
+
+/**
+ * \def MBEDTLS_AESNI_C
+ *
+ * Enable AES-NI support on x86-64.
+ *
+ * Module:  library/aesni.c
+ * Caller:  library/aes.c
+ *
+ * Requires: MBEDTLS_HAVE_ASM
+ *
+ * This modules adds support for the AES-NI instructions on x86-64
+ */
+//#define MBEDTLS_AESNI_C
+
+/**
+ * \def MBEDTLS_AES_C
+ *
+ * Enable the AES block cipher.
+ *
+ * Module:  library/aes.c
+ * Caller:  library/cipher.c
+ *          library/pem.c
+ *          library/ctr_drbg.c
+ *
+ * This module is required to support the TLS ciphersuites that use the AES
+ * cipher.
+ *
+ * PEM_PARSE uses AES for decrypting encrypted keys.
+ */
+#define MBEDTLS_AES_C
+
+/**
+ * \def MBEDTLS_ARC4_C
+ *
+ * Enable the ARCFOUR stream cipher.
+ *
+ * Module:  library/arc4.c
+ * Caller:  library/cipher.c
+ *
+ * This module is required to support the TLS ciphersuites that use the ARC4
+ * cipher.
+ *
+ * \warning   ARC4 is considered a weak cipher and its use constitutes a
+ *            security risk. If possible, we recommend avoidng dependencies on
+ *            it, and considering stronger ciphers instead.
+ *
+ */
+#define MBEDTLS_ARC4_C
+
+/**
+ * \def MBEDTLS_ASN1_PARSE_C
+ *
+ * Enable the generic ASN1 parser.
+ *
+ * Module:  library/asn1.c
+ * Caller:  library/dhm.c
+ *          library/pkcs12.c
+ *          library/pkcs5.c
+ *          library/pkparse.c
+ */
+#define MBEDTLS_ASN1_PARSE_C
+
+/**
+ * \def MBEDTLS_ASN1_WRITE_C
+ *
+ * Enable the generic ASN1 writer.
+ *
+ * Module:  library/asn1write.c
+ * Caller:  library/ecdsa.c
+ *          library/pkwrite.c
+ */
+#define MBEDTLS_ASN1_WRITE_C
+
+/**
+ * \def MBEDTLS_BASE64_C
+ *
+ * Enable the Base64 module.
+ *
+ * Module:  library/base64.c
+ * Caller:  library/pem.c
+ *
+ * This module is required for PEM support (required by X.509).
+ */
+#define MBEDTLS_BASE64_C
+
+/**
+ * \def MBEDTLS_BIGNUM_C
+ *
+ * Enable the multi-precision integer library.
+ *
+ * Module:  library/bignum.c
+ * Caller:  library/dhm.c
+ *          library/ecp.c
+ *          library/ecdsa.c
+ *          library/rsa.c
+ *          library/rsa_internal.c
+ *
+ * This module is required for RSA, DHM and ECC (ECDH, ECDSA) support.
+ */
+#define MBEDTLS_BIGNUM_C
+
+/**
+ * \def MBEDTLS_BLOWFISH_C
+ *
+ * Enable the Blowfish block cipher.
+ *
+ * Module:  library/blowfish.c
+ */
+#define MBEDTLS_BLOWFISH_C
+
+/**
+ * \def MBEDTLS_CAMELLIA_C
+ *
+ * Enable the Camellia block cipher.
+ *
+ * Module:  library/camellia.c
+ * Caller:  library/cipher.c
+ *
+ * This module is required to support the TLS ciphersuites that use the
+ * Camellia cipher.
+ */
+#define MBEDTLS_CAMELLIA_C
+
+/**
+ * \def MBEDTLS_ARIA_C
+ *
+ * Enable the ARIA block cipher.
+ *
+ * Module:  library/aria.c
+ * Caller:  library/cipher.c
+ *
+ * This module is required to support the TLS ciphersuites that use the
+ * ARIA cipher.
+ */
+//#define MBEDTLS_ARIA_C
+
+/**
+ * \def MBEDTLS_CCM_C
+ *
+ * Enable the Counter with CBC-MAC (CCM) mode for 128-bit block cipher.
+ *
+ * Module:  library/ccm.c
+ *
+ * Requires: MBEDTLS_AES_C or MBEDTLS_CAMELLIA_C
+ *
+ * This module is required to support AES-CCM ciphersuites in TLS.
+ */
+#define MBEDTLS_CCM_C
+
+/**
+ * \def MBEDTLS_CHACHA20_C
+ *
+ * Enable the ChaCha20 stream cipher.
+ *
+ * Module:  library/chacha20.c
+ */
+#define MBEDTLS_CHACHA20_C
+
+/**
+ * \def MBEDTLS_CHACHAPOLY_C
+ *
+ * Enable the ChaCha20-Poly1305 AEAD algorithm.
+ *
+ * Module:  library/chachapoly.c
+ *
+ * This module requires: MBEDTLS_CHACHA20_C, MBEDTLS_POLY1305_C
+ */
+#define MBEDTLS_CHACHAPOLY_C
+
+/**
+ * \def MBEDTLS_CIPHER_C
+ *
+ * Enable the generic cipher layer.
+ *
+ * Module:  library/cipher.c
+ *
+ * Uncomment to enable generic cipher wrappers.
+ */
+#define MBEDTLS_CIPHER_C
+
+/**
+ * \def MBEDTLS_CMAC_C
+ *
+ * Enable the CMAC (Cipher-based Message Authentication Code) mode for block
+ * ciphers.
+ *
+ * Module:  library/cmac.c
+ *
+ * Requires: MBEDTLS_AES_C or MBEDTLS_DES_C
+ *
+ */
+#define MBEDTLS_CMAC_C
+
+/**
+ * \def MBEDTLS_CTR_DRBG_C
+ *
+ * Enable the CTR_DRBG AES-based random generator.
+ * The CTR_DRBG generator uses AES-256 by default.
+ * To use AES-128 instead, enable MBEDTLS_CTR_DRBG_USE_128_BIT_KEY below.
+ *
+ * Module:  library/ctr_drbg.c
+ * Caller:
+ *
+ * Requires: MBEDTLS_AES_C
+ *
+ * This module provides the CTR_DRBG AES random number generator.
+ */
+#define MBEDTLS_CTR_DRBG_C
+
+/**
+ * \def MBEDTLS_DES_C
+ *
+ * Enable the DES block cipher.
+ *
+ * Module:  library/des.c
+ * Caller:  library/pem.c
+ *          library/cipher.c
+ *
+ * This module is required to support the TLS ciphersuites that use the DES
+ * cipher.
+ *
+ * PEM_PARSE uses DES/3DES for decrypting encrypted keys.
+ *
+ * \warning   DES is considered a weak cipher and its use constitutes a
+ *            security risk. We recommend considering stronger ciphers instead.
+ */
+#define MBEDTLS_DES_C
+
+/**
+ * \def MBEDTLS_DHM_C
+ *
+ * Enable the Diffie-Hellman-Merkle module.
+ *
+ * Module:  library/dhm.c
+ *
+ * This module is used by the following key exchanges:
+ *      DHE-RSA, DHE-PSK
+ *
+ * \warning    Using DHE constitutes a security risk as it
+ *             is not possible to validate custom DH parameters.
+ *             If possible, it is recommended users should consider
+ *             preferring other methods of key exchange.
+ *             See dhm.h for more details.
+ *
+ */
+#define MBEDTLS_DHM_C
+
+/**
+ * \def MBEDTLS_ECDH_C
+ *
+ * Enable the elliptic curve Diffie-Hellman library.
+ *
+ * Module:  library/ecdh.c
+ *
+ * This module is used by the following key exchanges:
+ *      ECDHE-ECDSA, ECDHE-RSA, DHE-PSK
+ *
+ * Requires: MBEDTLS_ECP_C
+ */
+#define MBEDTLS_ECDH_C
+
+/**
+ * \def MBEDTLS_ECDSA_C
+ *
+ * Enable the elliptic curve DSA library.
+ *
+ * Module:  library/ecdsa.c
+ * Caller:
+ *
+ * This module is used by the following key exchanges:
+ *      ECDHE-ECDSA
+ *
+ * Requires: MBEDTLS_ECP_C, MBEDTLS_ASN1_WRITE_C, MBEDTLS_ASN1_PARSE_C
+ */
+#define MBEDTLS_ECDSA_C
+
+/**
+ * \def MBEDTLS_ECJPAKE_C
+ *
+ * Enable the elliptic curve J-PAKE library.
+ *
+ * \warning This is currently experimental. EC J-PAKE support is based on the
+ * Thread v1.0.0 specification; incompatible changes to the specification
+ * might still happen. For this reason, this is disabled by default.
+ *
+ * Module:  library/ecjpake.c
+ * Caller:
+ *
+ * This module is used by the following key exchanges:
+ *      ECJPAKE
+ *
+ * Requires: MBEDTLS_ECP_C, MBEDTLS_MD_C
+ */
+//#define MBEDTLS_ECJPAKE_C
+
+/**
+ * \def MBEDTLS_ECP_C
+ *
+ * Enable the elliptic curve over GF(p) library.
+ *
+ * Module:  library/ecp.c
+ * Caller:  library/ecdh.c
+ *          library/ecdsa.c
+ *          library/ecjpake.c
+ *
+ * Requires: MBEDTLS_BIGNUM_C and at least one MBEDTLS_ECP_DP_XXX_ENABLED
+ */
+#define MBEDTLS_ECP_C
+
+/**
+ * \def MBEDTLS_ENTROPY_C
+ *
+ * Enable the platform-specific entropy code.
+ *
+ * Module:  library/entropy.c
+ * Caller:
+ *
+ * Requires: MBEDTLS_SHA512_C or MBEDTLS_SHA256_C
+ *
+ * This module provides a generic entropy pool
+ */
+#define MBEDTLS_ENTROPY_C
+
+/**
+ * \def MBEDTLS_ERROR_C
+ *
+ * Enable error code to error string conversion.
+ *
+ * Module:  library/error.c
+ * Caller:
+ *
+ * This module enables mbedtls_strerror().
+ */
+#define MBEDTLS_ERROR_C
+
+/**
+ * \def MBEDTLS_GCM_C
+ *
+ * Enable the Galois/Counter Mode (GCM) for AES.
+ *
+ * Module:  library/gcm.c
+ *
+ * Requires: MBEDTLS_AES_C or MBEDTLS_CAMELLIA_C
+ *
+ * This module is required to support the TLS ciphersuites that use GCM.
+ */
+#define MBEDTLS_GCM_C
+
+/**
+ * \def MBEDTLS_HAVEGE_C
+ *
+ * Enable the HAVEGE random generator.
+ *
+ * Warning: the HAVEGE random generator is not suitable for virtualized
+ *          environments
+ *
+ * Warning: the HAVEGE random generator is dependent on timing and specific
+ *          processor traits. It is therefore not advised to use HAVEGE as
+ *          your applications primary random generator or primary entropy pool
+ *          input. As a secondary input to your entropy pool, it IS able add
+ *          the (limited) extra entropy it provides.
+ *
+ * Module:  library/havege.c
+ * Caller:
+ *
+ * Requires: MBEDTLS_TIMING_C
+ *
+ * Uncomment to enable the HAVEGE random generator.
+ */
+//#define MBEDTLS_HAVEGE_C
+
+/**
+ * \def MBEDTLS_HKDF_C
+ *
+ * Enable the HKDF algorithm (RFC 5869).
+ *
+ * Module:  library/hkdf.c
+ * Caller:
+ *
+ * Requires: MBEDTLS_MD_C
+ *
+ * This module adds support for the Hashed Message Authentication Code
+ * (HMAC)-based key derivation function (HKDF).
+ */
+#define MBEDTLS_HKDF_C
+
+/**
+ * \def MBEDTLS_HMAC_DRBG_C
+ *
+ * Enable the HMAC_DRBG random generator.
+ *
+ * Module:  library/hmac_drbg.c
+ * Caller:
+ *
+ * Requires: MBEDTLS_MD_C
+ *
+ * Uncomment to enable the HMAC_DRBG random number geerator.
+ */
+#define MBEDTLS_HMAC_DRBG_C
+
+/**
+ * \def MBEDTLS_NIST_KW_C
+ *
+ * Enable the Key Wrapping mode for 128-bit block ciphers,
+ * as defined in NIST SP 800-38F. Only KW and KWP modes
+ * are supported. At the moment, only AES is approved by NIST.
+ *
+ * Module:  library/nist_kw.c
+ *
+ * Requires: MBEDTLS_AES_C and MBEDTLS_CIPHER_C
+ */
+//#define MBEDTLS_NIST_KW_C
+
+/**
+ * \def MBEDTLS_MD_C
+ *
+ * Enable the generic message digest layer.
+ *
+ * Module:  library/md.c
+ * Caller:
+ *
+ * Uncomment to enable generic message digest wrappers.
+ */
+#define MBEDTLS_MD_C
+
+/**
+ * \def MBEDTLS_MD2_C
+ *
+ * Enable the MD2 hash algorithm.
+ *
+ * Module:  library/md2.c
+ * Caller:
+ *
+ * Uncomment to enable support for (rare) MD2-signed X.509 certs.
+ *
+ * \warning   MD2 is considered a weak message digest and its use constitutes a
+ *            security risk. If possible, we recommend avoiding dependencies on
+ *            it, and considering stronger message digests instead.
+ *
+ */
+//#define MBEDTLS_MD2_C
+
+/**
+ * \def MBEDTLS_MD4_C
+ *
+ * Enable the MD4 hash algorithm.
+ *
+ * Module:  library/md4.c
+ * Caller:
+ *
+ * Uncomment to enable support for (rare) MD4-signed X.509 certs.
+ *
+ * \warning   MD4 is considered a weak message digest and its use constitutes a
+ *            security risk. If possible, we recommend avoiding dependencies on
+ *            it, and considering stronger message digests instead.
+ *
+ */
+//#define MBEDTLS_MD4_C
+
+/**
+ * \def MBEDTLS_MD5_C
+ *
+ * Enable the MD5 hash algorithm.
+ *
+ * Module:  library/md5.c
+ * Caller:  library/md.c
+ *          library/pem.c
+ *
+ * This module is required for SSL/TLS up to version 1.1, and for TLS 1.2
+ * depending on the handshake parameters. Further, it is used for checking
+ * MD5-signed certificates, and for PBKDF1 when decrypting PEM-encoded
+ * encrypted keys.
+ *
+ * \warning   MD5 is considered a weak message digest and its use constitutes a
+ *            security risk. If possible, we recommend avoiding dependencies on
+ *            it, and considering stronger message digests instead.
+ *
+ */
+#define MBEDTLS_MD5_C
+
+/**
+ * \def MBEDTLS_MEMORY_BUFFER_ALLOC_C
+ *
+ * Enable the buffer allocator implementation that makes use of a (stack)
+ * based buffer to 'allocate' dynamic memory. (replaces calloc() and free()
+ * calls)
+ *
+ * Module:  library/memory_buffer_alloc.c
+ *
+ * Requires: MBEDTLS_PLATFORM_C
+ *           MBEDTLS_PLATFORM_MEMORY (to use it within mbed TLS)
+ *
+ * Enable this module to enable the buffer memory allocator.
+ */
+//#define MBEDTLS_MEMORY_BUFFER_ALLOC_C
+
+/**
+ * \def MBEDTLS_OID_C
+ *
+ * Enable the OID database.
+ *
+ * Module:  library/oid.c
+ * Caller:  library/asn1write.c
+ *          library/pkcs5.c
+ *          library/pkparse.c
+ *          library/pkwrite.c
+ *          library/rsa.c
+ *
+ * This modules translates between OIDs and internal values.
+ */
+#define MBEDTLS_OID_C
+
+/**
+ * \def MBEDTLS_PADLOCK_C
+ *
+ * Enable VIA Padlock support on x86.
+ *
+ * Module:  library/padlock.c
+ * Caller:  library/aes.c
+ *
+ * Requires: MBEDTLS_HAVE_ASM
+ *
+ * This modules adds support for the VIA PadLock on x86.
+ */
+//#define MBEDTLS_PADLOCK_C
+
+/**
+ * \def MBEDTLS_PEM_PARSE_C
+ *
+ * Enable PEM decoding / parsing.
+ *
+ * Module:  library/pem.c
+ * Caller:  library/dhm.c
+ *          library/pkparse.c
+ *
+ * Requires: MBEDTLS_BASE64_C
+ *
+ * This modules adds support for decoding / parsing PEM files.
+ */
+#define MBEDTLS_PEM_PARSE_C
+
+/**
+ * \def MBEDTLS_PEM_WRITE_C
+ *
+ * Enable PEM encoding / writing.
+ *
+ * Module:  library/pem.c
+ * Caller:  library/pkwrite.c
+ *
+ * Requires: MBEDTLS_BASE64_C
+ *
+ * This modules adds support for encoding / writing PEM files.
+ */
+#define MBEDTLS_PEM_WRITE_C
+
+/**
+ * \def MBEDTLS_PK_C
+ *
+ * Enable the generic public (asymetric) key layer.
+ *
+ * Module:  library/pk.c
+ *
+ * Requires: MBEDTLS_RSA_C or MBEDTLS_ECP_C
+ *
+ * Uncomment to enable generic public key wrappers.
+ */
+#define MBEDTLS_PK_C
+
+/**
+ * \def MBEDTLS_PK_PARSE_C
+ *
+ * Enable the generic public (asymetric) key parser.
+ *
+ * Module:  library/pkparse.c
+ *
+ * Requires: MBEDTLS_PK_C
+ *
+ * Uncomment to enable generic public key parse functions.
+ */
+#define MBEDTLS_PK_PARSE_C
+
+/**
+ * \def MBEDTLS_PK_WRITE_C
+ *
+ * Enable the generic public (asymetric) key writer.
+ *
+ * Module:  library/pkwrite.c
+ *
+ * Requires: MBEDTLS_PK_C
+ *
+ * Uncomment to enable generic public key write functions.
+ */
+#define MBEDTLS_PK_WRITE_C
+
+/**
+ * \def MBEDTLS_PKCS5_C
+ *
+ * Enable PKCS#5 functions.
+ *
+ * Module:  library/pkcs5.c
+ *
+ * Requires: MBEDTLS_MD_C
+ *
+ * This module adds support for the PKCS#5 functions.
+ */
+#define MBEDTLS_PKCS5_C
+
+/**
+ * \def MBEDTLS_PKCS12_C
+ *
+ * Enable PKCS#12 PBE functions.
+ * Adds algorithms for parsing PKCS#8 encrypted private keys
+ *
+ * Module:  library/pkcs12.c
+ * Caller:  library/pkparse.c
+ *
+ * Requires: MBEDTLS_ASN1_PARSE_C, MBEDTLS_CIPHER_C, MBEDTLS_MD_C
+ * Can use:  MBEDTLS_ARC4_C
+ *
+ * This module enables PKCS#12 functions.
+ */
+#define MBEDTLS_PKCS12_C
+
+/**
+ * \def MBEDTLS_PLATFORM_C
+ *
+ * Enable the platform abstraction layer that allows you to re-assign
+ * functions like calloc(), free(), snprintf(), printf(), fprintf(), exit().
+ *
+ * Enabling MBEDTLS_PLATFORM_C enables to use of MBEDTLS_PLATFORM_XXX_ALT
+ * or MBEDTLS_PLATFORM_XXX_MACRO directives, allowing the functions mentioned
+ * above to be specified at runtime or compile time respectively.
+ *
+ * \note This abstraction layer must be enabled on Windows (including MSYS2)
+ * as other module rely on it for a fixed snprintf implementation.
+ *
+ * Module:  library/platform.c
+ * Caller:  Most other .c files
+ *
+ * This module enables abstraction of common (libc) functions.
+ */
+//#define MBEDTLS_PLATFORM_C
+
+/**
+ * \def MBEDTLS_POLY1305_C
+ *
+ * Enable the Poly1305 MAC algorithm.
+ *
+ * Module:  library/poly1305.c
+ * Caller:  library/chachapoly.c
+ */
+#define MBEDTLS_POLY1305_C
+
+/**
+ * \def MBEDTLS_PSA_CRYPTO_C
+ *
+ * Enable the Platform Security Architecture cryptography API.
+ *
+ * Module:  library/psa_crypto.c
+ *
+ * Requires: MBEDTLS_CTR_DRBG_C, MBEDTLS_ENTROPY_C
+ *
+ */
+#define MBEDTLS_PSA_CRYPTO_C
+
+/**
+ * \def MBEDTLS_PSA_CRYPTO_STORAGE_C
+ *
+ * Enable the Platform Security Architecture persistent key storage.
+ *
+ * Module:  library/psa_crypto_storage.c
+ *
+ * Requires: MBEDTLS_PSA_CRYPTO_C,
+ *           either MBEDTLS_PSA_ITS_FILE_C or a native implementation of
+ *           the PSA ITS interface
+ */
+//#define MBEDTLS_PSA_CRYPTO_STORAGE_C
+
+/**
+ * \def MBEDTLS_PSA_ITS_FILE_C
+ *
+ * Enable the emulation of the Platform Security Architecture
+ * Internal Trusted Storage (PSA ITS) over files.
+ *
+ * Module:  library/psa_its_file.c
+ *
+ * Requires: MBEDTLS_FS_IO
+ */
+//#define MBEDTLS_PSA_ITS_FILE_C
+
+/**
+ * \def MBEDTLS_RIPEMD160_C
+ *
+ * Enable the RIPEMD-160 hash algorithm.
+ *
+ * Module:  library/ripemd160.c
+ * Caller:  library/md.c
+ *
+ */
+#define MBEDTLS_RIPEMD160_C
+
+/**
+ * \def MBEDTLS_RSA_C
+ *
+ * Enable the RSA public-key cryptosystem.
+ *
+ * Module:  library/rsa.c
+ *          library/rsa_internal.c
+ *
+ * This module is used by the following key exchanges:
+ *      RSA, DHE-RSA, ECDHE-RSA, RSA-PSK
+ *
+ * Requires: MBEDTLS_BIGNUM_C, MBEDTLS_OID_C
+ */
+#define MBEDTLS_RSA_C
+
+/**
+ * \def MBEDTLS_SHA1_C
+ *
+ * Enable the SHA1 cryptographic hash algorithm.
+ *
+ * Module:  library/sha1.c
+ * Caller:  library/md.c
+ *
+ * This module is required for SSL/TLS up to version 1.1, for TLS 1.2
+ * depending on the handshake parameters, and for SHA1-signed certificates.
+ *
+ * \warning   SHA-1 is considered a weak message digest and its use constitutes
+ *            a security risk. If possible, we recommend avoiding dependencies
+ *            on it, and considering stronger message digests instead.
+ *
+ */
+#define MBEDTLS_SHA1_C
+
+/**
+ * \def MBEDTLS_SHA256_C
+ *
+ * Enable the SHA-224 and SHA-256 cryptographic hash algorithms.
+ *
+ * Module:  library/sha256.c
+ * Caller:  library/entropy.c
+ *          library/md.c
+ *
+ * This module adds support for SHA-224 and SHA-256.
+ * This module is required for the SSL/TLS 1.2 PRF function.
+ */
+#define MBEDTLS_SHA256_C
+
+/**
+ * \def MBEDTLS_SHA512_C
+ *
+ * Enable the SHA-384 and SHA-512 cryptographic hash algorithms.
+ *
+ * Module:  library/sha512.c
+ * Caller:  library/entropy.c
+ *          library/md.c
+ *
+ * This module adds support for SHA-384 and SHA-512.
+ */
+#define MBEDTLS_SHA512_C
+
+/**
+ * \def MBEDTLS_THREADING_C
+ *
+ * Enable the threading abstraction layer.
+ * By default mbed TLS assumes it is used in a non-threaded environment or that
+ * contexts are not shared between threads. If you do intend to use contexts
+ * between threads, you will need to enable this layer to prevent race
+ * conditions. See also our Knowledge Base article about threading:
+ * https://tls.mbed.org/kb/development/thread-safety-and-multi-threading
+ *
+ * Module:  library/threading.c
+ *
+ * This allows different threading implementations (self-implemented or
+ * provided).
+ *
+ * You will have to enable either MBEDTLS_THREADING_ALT or
+ * MBEDTLS_THREADING_PTHREAD.
+ *
+ * Enable this layer to allow use of mutexes within mbed TLS
+ */
+//#define MBEDTLS_THREADING_C
+
+/**
+ * \def MBEDTLS_TIMING_C
+ *
+ * Enable the semi-portable timing interface.
+ *
+ * \note The provided implementation only works on POSIX/Unix (including Linux,
+ * BSD and OS X) and Windows. On other platforms, you can either disable that
+ * module and provide your own implementations of the callbacks needed by Mbed
+ * TLS's \c mbedtls_ssl_set_timer_cb() for DTLS, or leave it enabled and
+ * provide your own implementation of the whole module by setting
+ * \c MBEDTLS_TIMING_ALT in the current file.
+ *
+ * \note See also our Knowledge Base article about porting to a new
+ * environment:
+ * https://tls.mbed.org/kb/how-to/how-do-i-port-mbed-tls-to-a-new-environment-OS
+ *
+ * Module:  library/timing.c
+ * Caller:  library/havege.c
+ *
+ * This module is used by the HAVEGE random number generator.
+ */
+//#define MBEDTLS_TIMING_C
+
+/**
+ * \def MBEDTLS_VERSION_C
+ *
+ * Enable run-time version information.
+ *
+ * Module:  library/version.c
+ *
+ * This module provides run-time version information.
+ */
+#define MBEDTLS_VERSION_C
+
+/**
+ * \def MBEDTLS_XTEA_C
+ *
+ * Enable the XTEA block cipher.
+ *
+ * Module:  library/xtea.c
+ * Caller:
+ */
+#define MBEDTLS_XTEA_C
+
+/* \} name SECTION: mbed TLS modules */
+
+/**
+ * \name SECTION: Module configuration options
+ *
+ * This section allows for the setting of module specific sizes and
+ * configuration options. The default values are already present in the
+ * relevant header files and should suffice for the regular use cases.
+ *
+ * Our advice is to enable options and change their values here
+ * only if you have a good reason and know the consequences.
+ *
+ * Please check the respective header file for documentation on these
+ * parameters (to prevent duplicate documentation).
+ * \{
+ */
+
+/* MPI / BIGNUM options */
+//#define MBEDTLS_MPI_WINDOW_SIZE            6 /**< Maximum windows size used. */
+//#define MBEDTLS_MPI_MAX_SIZE            1024 /**< Maximum number of bytes for usable MPIs. */
+
+/* CTR_DRBG options */
+//#define MBEDTLS_CTR_DRBG_ENTROPY_LEN               48 /**< Amount of entropy used per seed by default (48 with SHA-512, 32 with SHA-256) */
+//#define MBEDTLS_CTR_DRBG_RESEED_INTERVAL        10000 /**< Interval before reseed is performed by default */
+//#define MBEDTLS_CTR_DRBG_MAX_INPUT                256 /**< Maximum number of additional input bytes */
+//#define MBEDTLS_CTR_DRBG_MAX_REQUEST             1024 /**< Maximum number of requested bytes per call */
+//#define MBEDTLS_CTR_DRBG_MAX_SEED_INPUT           384 /**< Maximum size of (re)seed buffer */
+//#define MBEDTLS_CTR_DRBG_USE_128_BIT_KEY              /**< Use 128-bit key for CTR_DRBG - may reduce security (see ctr_drbg.h) */
+
+/* HMAC_DRBG options */
+//#define MBEDTLS_HMAC_DRBG_RESEED_INTERVAL   10000 /**< Interval before reseed is performed by default */
+//#define MBEDTLS_HMAC_DRBG_MAX_INPUT           256 /**< Maximum number of additional input bytes */
+//#define MBEDTLS_HMAC_DRBG_MAX_REQUEST        1024 /**< Maximum number of requested bytes per call */
+//#define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT      384 /**< Maximum size of (re)seed buffer */
+
+/* ECP options */
+//#define MBEDTLS_ECP_MAX_BITS             521 /**< Maximum bit size of groups */
+//#define MBEDTLS_ECP_WINDOW_SIZE            6 /**< Maximum window size used */
+//#define MBEDTLS_ECP_FIXED_POINT_OPTIM      1 /**< Enable fixed-point speed-up */
+
+/* Entropy options */
+//#define MBEDTLS_ENTROPY_MAX_SOURCES                20 /**< Maximum number of sources supported */
+//#define MBEDTLS_ENTROPY_MAX_GATHER                128 /**< Maximum amount requested from entropy sources */
+//#define MBEDTLS_ENTROPY_MIN_HARDWARE               32 /**< Default minimum number of bytes required for the hardware entropy source mbedtls_hardware_poll() before entropy is released */
+
+/* Memory buffer allocator options */
+//#define MBEDTLS_MEMORY_ALIGN_MULTIPLE      4 /**< Align on multiples of this value */
+
+/* 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 */
+//#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 */
+//#define MBEDTLS_PLATFORM_STD_FPRINTF      fprintf /**< Default fprintf to use, can be undefined */
+//#define MBEDTLS_PLATFORM_STD_PRINTF        printf /**< Default printf to use, can be undefined */
+/* Note: your snprintf must correctly zero-terminate the buffer! */
+//#define MBEDTLS_PLATFORM_STD_SNPRINTF    snprintf /**< Default snprintf to use, can be undefined */
+//#define MBEDTLS_PLATFORM_STD_EXIT_SUCCESS       0 /**< Default exit value to use, can be undefined */
+//#define MBEDTLS_PLATFORM_STD_EXIT_FAILURE       1 /**< Default exit value to use, can be undefined */
+//#define MBEDTLS_PLATFORM_STD_NV_SEED_READ   mbedtls_platform_std_nv_seed_read /**< Default nv_seed_read function to use, can be undefined */
+//#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 */
+/* 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_EXIT_MACRO            exit /**< Default exit 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 */
+//#define MBEDTLS_PLATFORM_TIME_TYPE_MACRO       time_t /**< Default time macro to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
+//#define MBEDTLS_PLATFORM_FPRINTF_MACRO      fprintf /**< Default fprintf macro to use, can be undefined */
+//#define MBEDTLS_PLATFORM_PRINTF_MACRO        printf /**< Default printf macro to use, can be undefined */
+/* Note: your snprintf must correctly zero-terminate the buffer! */
+//#define MBEDTLS_PLATFORM_SNPRINTF_MACRO    snprintf /**< Default snprintf macro to use, can be undefined */
+//#define MBEDTLS_PLATFORM_VSNPRINTF_MACRO    vsnprintf /**< Default vsnprintf macro to use, can be undefined */
+//#define MBEDTLS_PLATFORM_NV_SEED_READ_MACRO   mbedtls_platform_std_nv_seed_read /**< Default nv_seed_read function to use, can be undefined */
+//#define MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO  mbedtls_platform_std_nv_seed_write /**< Default nv_seed_write function to use, can be undefined */
+
+/**
+ * Uncomment the macro to let mbed TLS use your alternate implementation of
+ * mbedtls_platform_zeroize(). This replaces the default implementation in
+ * platform_util.c.
+ *
+ * mbedtls_platform_zeroize() is a widely used function across the library to
+ * zero a block of memory. The implementation is expected to be secure in the
+ * sense that it has been written to prevent the compiler from removing calls
+ * to mbedtls_platform_zeroize() as part of redundant code elimination
+ * optimizations. However, it is difficult to guarantee that calls to
+ * mbedtls_platform_zeroize() will not be optimized by the compiler as older
+ * versions of the C language standards do not provide a secure implementation
+ * of memset(). Therefore, MBEDTLS_PLATFORM_ZEROIZE_ALT enables users to
+ * configure their own implementation of mbedtls_platform_zeroize(), for
+ * example by using directives specific to their compiler, features from newer
+ * C standards (e.g using memset_s() in C11) or calling a secure memset() from
+ * their system (e.g explicit_bzero() in BSD).
+ */
+//#define MBEDTLS_PLATFORM_ZEROIZE_ALT
+
+/**
+ * Uncomment the macro to let Mbed TLS use your alternate implementation of
+ * mbedtls_platform_gmtime_r(). This replaces the default implementation in
+ * platform_util.c.
+ *
+ * gmtime() is not a thread-safe function as defined in the C standard. The
+ * library will try to use safer implementations of this function, such as
+ * gmtime_r() when available. However, if Mbed TLS cannot identify the target
+ * system, the implementation of mbedtls_platform_gmtime_r() will default to
+ * using the standard gmtime(). In this case, calls from the library to
+ * gmtime() will be guarded by the global mutex mbedtls_threading_gmtime_mutex
+ * if MBEDTLS_THREADING_C is enabled. We recommend that calls from outside the
+ * library are also guarded with this mutex to avoid race conditions. However,
+ * if the macro MBEDTLS_PLATFORM_GMTIME_R_ALT is defined, Mbed TLS will
+ * unconditionally use the implementation for mbedtls_platform_gmtime_r()
+ * supplied at compile time.
+ */
+//#define MBEDTLS_PLATFORM_GMTIME_R_ALT
+
+/* \} name SECTION: Customisation configuration options */
+
+/* Target and application specific configurations
+ *
+ * Allow user to override any previous default.
+ *
+ */
+#if defined(MBEDTLS_USER_CONFIG_FILE)
+#include MBEDTLS_USER_CONFIG_FILE
+#endif
+
+#include "mbedtls/check_config.h"
+
+#endif /* CONFIG_MBED_CRYPTO_H */
diff --git a/components/service/crypto/client/cpp/crypto_client.cpp b/components/service/crypto/client/cpp/crypto_client.cpp
new file mode 100644
index 0000000..a374954
--- /dev/null
+++ b/components/service/crypto/client/cpp/crypto_client.cpp
@@ -0,0 +1,806 @@
+/*
+ * Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <cstring>
+#include <cstdlib>
+#include "crypto_client.h"
+#include <protocols/rpc/common/packed-c/status.h>
+#include <service/common/serializer/protobuf/pb_helper.h>
+#include <rpc_caller.h>
+#include <service/crypto/protobuf/opcodes.pb.h>
+#include <service/crypto/protobuf/generate_key.pb.h>
+#include <service/crypto/protobuf/destroy_key.pb.h>
+#include <service/crypto/protobuf/import_key.pb.h>
+#include <service/crypto/protobuf/open_key.pb.h>
+#include <service/crypto/protobuf/close_key.pb.h>
+#include <service/crypto/protobuf/export_key.pb.h>
+#include <service/crypto/protobuf/export_public_key.pb.h>
+#include <service/crypto/protobuf/sign_hash.pb.h>
+#include <service/crypto/protobuf/verify_hash.pb.h>
+#include <service/crypto/protobuf/asymmetric_encrypt.pb.h>
+#include <service/crypto/protobuf/asymmetric_decrypt.pb.h>
+#include <service/crypto/protobuf/generate_random.pb.h>
+#include <pb_encode.h>
+#include <pb_decode.h>
+
+crypto_client::crypto_client() :
+    m_caller(NULL),
+    m_err_rpc_status(TS_RPC_CALL_ACCEPTED)
+{
+
+}
+
+crypto_client::crypto_client(struct rpc_caller *caller) :
+    m_caller(caller),
+    m_err_rpc_status(TS_RPC_CALL_ACCEPTED)
+{
+
+}
+
+crypto_client::~crypto_client()
+{
+
+}
+
+int crypto_client::err_rpc_status() const
+{
+    return m_err_rpc_status;
+}
+
+psa_status_t crypto_client::generate_key(const psa_key_attributes_t *attributes, psa_key_handle_t *handle)
+{
+    size_t req_len;
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_GenerateKeyIn req_msg = ts_crypto_GenerateKeyIn_init_default;
+
+    translate_key_attributes(req_msg.attributes, *attributes);
+    req_msg.has_attributes = true;
+
+    if (pb_get_encoded_size(&req_len, ts_crypto_GenerateKeyIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_GenerateKeyIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                ts_crypto_Opcode_GENERATE_KEY, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) {
+
+                psa_status = opstatus;
+
+                if (psa_status == PSA_SUCCESS) {
+
+                    ts_crypto_GenerateKeyOut resp_msg = ts_crypto_GenerateKeyOut_init_default;
+                    pb_istream_t istream = pb_istream_from_buffer(resp_buf, resp_len);
+
+                    if (pb_decode(&istream, ts_crypto_GenerateKeyOut_fields, &resp_msg)) {
+
+                        *handle = resp_msg.handle;
+                    }
+                    else {
+                        /* Failed to decode response message */
+                        psa_status = PSA_ERROR_GENERIC_ERROR;
+                    }
+                }
+            }
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::destroy_key(psa_key_handle_t handle)
+{
+    size_t req_len;
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_DestroyKeyIn req_msg = ts_crypto_DestroyKeyIn_init_default;
+
+    req_msg.handle = handle;
+
+    if (pb_get_encoded_size(&req_len, ts_crypto_DestroyKeyIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_DestroyKeyIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                ts_crypto_Opcode_DESTROY_KEY, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) psa_status = opstatus;
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::open_key(psa_key_id_t id, psa_key_handle_t *handle)
+{
+    size_t req_len;
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_OpenKeyIn req_msg = ts_crypto_OpenKeyIn_init_default;
+    req_msg.id = id;
+
+	if (pb_get_encoded_size(&req_len, ts_crypto_OpenKeyIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_OpenKeyIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                        ts_crypto_Opcode_OPEN_KEY, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) {
+
+                psa_status = opstatus;
+
+                if (psa_status == PSA_SUCCESS) {
+
+                    ts_crypto_OpenKeyOut resp_msg = ts_crypto_OpenKeyOut_init_default;
+                    pb_istream_t istream = pb_istream_from_buffer(resp_buf, resp_len);
+
+                    if (pb_decode(&istream, ts_crypto_OpenKeyOut_fields, &resp_msg)) {
+
+                        *handle = resp_msg.handle;
+                    }
+                    else {
+                        /* Failed to decode response message */
+                        psa_status = PSA_ERROR_GENERIC_ERROR;
+                    }
+                }
+            }
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::close_key(psa_key_handle_t handle)
+{
+    size_t req_len;
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_CloseKeyIn req_msg = ts_crypto_CloseKeyIn_init_default;
+
+    req_msg.handle = handle;
+
+    if (pb_get_encoded_size(&req_len, ts_crypto_CloseKeyIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_CloseKeyIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                ts_crypto_Opcode_CLOSE_KEY, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) psa_status = opstatus;
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::import_key(const psa_key_attributes_t *attributes,
+                        const uint8_t *data, size_t data_length, psa_key_handle_t *handle)
+{
+    size_t req_len;
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_ImportKeyIn req_msg = ts_crypto_ImportKeyIn_init_default;
+    pb_bytes_array_t *key_byte_array = pb_malloc_byte_array_containing_bytes(data, data_length);
+
+    translate_key_attributes(req_msg.attributes, *attributes);
+    req_msg.has_attributes = true;
+    req_msg.data = pb_out_byte_array(key_byte_array);
+
+    if (pb_get_encoded_size(&req_len, ts_crypto_ImportKeyIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_ImportKeyIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                ts_crypto_Opcode_IMPORT_KEY, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) {
+
+                psa_status = opstatus;
+
+                if (psa_status == PSA_SUCCESS) {
+
+                    ts_crypto_ImportKeyOut resp_msg = ts_crypto_ImportKeyOut_init_default;
+                    pb_istream_t istream = pb_istream_from_buffer(resp_buf, resp_len);
+
+                    if (pb_decode(&istream, ts_crypto_ImportKeyOut_fields, &resp_msg)) {
+
+                        *handle = resp_msg.handle;
+                    }
+                    else {
+                        /* Failed to decode response message */
+                        psa_status = PSA_ERROR_GENERIC_ERROR;
+                    }
+                }
+            }
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    ::free(key_byte_array);
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::export_key(psa_key_handle_t handle,
+                        uint8_t *data, size_t data_size,
+                        size_t *data_length)
+{
+    size_t req_len;
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_ExportKeyIn req_msg = ts_crypto_ExportKeyIn_init_default;
+    req_msg.handle = handle;
+
+    *data_length = 0; /* For failure case */
+
+	if (pb_get_encoded_size(&req_len, ts_crypto_ExportKeyIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_ExportKeyIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                ts_crypto_Opcode_EXPORT_KEY, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) {
+
+                psa_status = opstatus;
+
+                if (psa_status == PSA_SUCCESS) {
+
+                    ts_crypto_ExportKeyOut resp_msg = ts_crypto_ExportKeyOut_init_default;
+                    pb_bytes_array_t *exported_key = pb_malloc_byte_array(resp_len);
+
+                    if (exported_key) {
+
+                        resp_msg.data = pb_in_byte_array(exported_key);
+                        pb_istream_t istream = pb_istream_from_buffer(resp_buf, resp_len);
+
+                        if (pb_decode(&istream, ts_crypto_ExportKeyOut_fields, &resp_msg)) {
+
+                            if (exported_key->size <= data_size) {
+
+                                memcpy(data, exported_key->bytes, exported_key->size);
+                                *data_length = exported_key->size;
+                            }
+                            else {
+                                /* Provided buffer is too small */
+                                psa_status = PSA_ERROR_BUFFER_TOO_SMALL;
+                            }
+                        }
+                        else {
+                            /* Failed to decode response message */
+                            psa_status = PSA_ERROR_GENERIC_ERROR;
+                        }
+
+                        ::free(exported_key);
+                    }
+                    else {
+                        /* Failed to allocate buffer for exported key */
+                        psa_status = PSA_ERROR_INSUFFICIENT_MEMORY;
+                    }
+                }
+            }
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::export_public_key(psa_key_handle_t handle,
+                                uint8_t *data, size_t data_size, size_t *data_length)
+{
+    size_t req_len;
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_ExportPublicKeyIn req_msg = ts_crypto_ExportPublicKeyIn_init_default;
+    req_msg.handle = handle;
+
+    *data_length = 0; /* For failure case */
+
+	if (pb_get_encoded_size(&req_len, ts_crypto_ExportPublicKeyIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_ExportPublicKeyIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                ts_crypto_Opcode_EXPORT_PUBLIC_KEY, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) {
+
+                psa_status = opstatus;
+
+                if (psa_status == PSA_SUCCESS) {
+
+                    ts_crypto_ExportPublicKeyOut resp_msg = ts_crypto_ExportPublicKeyOut_init_default;
+                    pb_bytes_array_t *exported_key = pb_malloc_byte_array(resp_len);
+
+                    if (exported_key) {
+
+                        resp_msg.data = pb_in_byte_array(exported_key);
+                        pb_istream_t istream = pb_istream_from_buffer(resp_buf, resp_len);
+
+                        if (pb_decode(&istream, ts_crypto_ExportPublicKeyOut_fields, &resp_msg)) {
+
+                            if (exported_key->size <= data_size) {
+
+                                memcpy(data, exported_key->bytes, exported_key->size);
+                                *data_length = exported_key->size;
+                            }
+                            else {
+                                /* Provided buffer is too small */
+                                psa_status = PSA_ERROR_BUFFER_TOO_SMALL;
+                            }
+                        }
+                        else {
+                            /* Failed to decode response message */
+                            psa_status = PSA_ERROR_GENERIC_ERROR;
+                        }
+
+                        ::free(exported_key);
+                    }
+                    else {
+                        /* Failed to alloocate buffer for exported key */
+                        psa_status = PSA_ERROR_INSUFFICIENT_MEMORY;
+                    }
+                }
+            }
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::sign_hash(psa_key_handle_t handle, psa_algorithm_t alg,
+                            const uint8_t *hash, size_t hash_length,
+                            uint8_t *signature, size_t signature_size, size_t *signature_length)
+{
+    size_t req_len;
+    pb_bytes_array_t *hash_byte_array = pb_malloc_byte_array_containing_bytes(hash, hash_length);
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_SignHashIn req_msg = ts_crypto_SignHashIn_init_default;
+
+    *signature_length = 0;  /* For failure case */
+
+    req_msg.handle = handle;
+    req_msg.alg = alg;
+	req_msg.hash = pb_out_byte_array(hash_byte_array);
+
+	if (pb_get_encoded_size(&req_len, ts_crypto_SignHashIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_SignHashIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                        ts_crypto_Opcode_SIGN_HASH, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) {
+
+                psa_status = opstatus;
+
+                if (psa_status == PSA_SUCCESS) {
+
+                    pb_bytes_array_t *sig_byte_array = pb_malloc_byte_array(PSA_SIGNATURE_MAX_SIZE);
+                    ts_crypto_SignHashOut resp_msg = ts_crypto_SignHashOut_init_default;
+                    resp_msg.signature = pb_in_byte_array(sig_byte_array);
+
+                    pb_istream_t istream = pb_istream_from_buffer(resp_buf, resp_len);
+
+                    if (pb_decode(&istream, ts_crypto_SignHashOut_fields, &resp_msg)) {
+
+                        if (sig_byte_array->size <= signature_size) {
+
+                            memcpy(signature, sig_byte_array->bytes, sig_byte_array->size);
+                            *signature_length = sig_byte_array->size;
+                        }
+                        else {
+                            /* Provided buffer is too small */
+                            psa_status = PSA_ERROR_BUFFER_TOO_SMALL;
+                        }
+                    }
+                    else {
+                        /* Failed to decode response message */
+                        psa_status = PSA_ERROR_GENERIC_ERROR;
+                    }
+
+                    ::free(sig_byte_array);
+                }
+            }
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    ::free(hash_byte_array);
+
+    return psa_status;
+}
+
+
+psa_status_t crypto_client::verify_hash(psa_key_handle_t handle, psa_algorithm_t alg,
+                        const uint8_t *hash, size_t hash_length,
+                        const uint8_t *signature, size_t signature_length)
+{
+    size_t req_len;
+    pb_bytes_array_t *hash_byte_array = pb_malloc_byte_array_containing_bytes(hash, hash_length);
+    pb_bytes_array_t *sig_byte_array = pb_malloc_byte_array_containing_bytes(signature, signature_length);
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_VerifyHashIn req_msg = ts_crypto_VerifyHashIn_init_default;
+
+    req_msg.handle = handle;
+    req_msg.alg = alg;
+	req_msg.hash = pb_out_byte_array(hash_byte_array);
+    req_msg.signature = pb_out_byte_array(sig_byte_array);
+
+	if (pb_get_encoded_size(&req_len, ts_crypto_VerifyHashIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_VerifyHashIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                        ts_crypto_Opcode_VERIFY_HASH, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) psa_status = opstatus;
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    ::free(hash_byte_array);
+    ::free(sig_byte_array);
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::asymmetric_encrypt(psa_key_handle_t handle, psa_algorithm_t alg,
+                        const uint8_t *input, size_t input_length,
+                        const uint8_t *salt, size_t salt_length,
+                        uint8_t *output, size_t output_size, size_t *output_length)
+{
+    size_t req_len;
+    pb_bytes_array_t *plaintext_byte_array = pb_malloc_byte_array_containing_bytes(input, input_length);
+    pb_bytes_array_t *salt_byte_array = pb_malloc_byte_array_containing_bytes(salt, salt_length);
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_AsymmetricEncryptIn req_msg = ts_crypto_AsymmetricEncryptIn_init_default;
+
+    *output_length = 0;  /* For failure case */
+
+    req_msg.handle = handle;
+    req_msg.alg = alg;
+	req_msg.plaintext = pb_out_byte_array(plaintext_byte_array);
+    req_msg.salt = pb_out_byte_array(salt_byte_array);
+
+	if (pb_get_encoded_size(&req_len, ts_crypto_AsymmetricEncryptIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus = PSA_ERROR_GENERIC_ERROR;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_AsymmetricEncryptIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                        ts_crypto_Opcode_ASYMMETRIC_ENCRYPT, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) {
+
+                psa_status = opstatus;
+
+                if (psa_status == PSA_SUCCESS) {
+
+                    pb_bytes_array_t *ciphertext_byte_array = pb_malloc_byte_array(output_size);
+                    ts_crypto_AsymmetricEncryptOut resp_msg = ts_crypto_AsymmetricEncryptOut_init_default;
+                    resp_msg.ciphertext = pb_in_byte_array(ciphertext_byte_array);
+
+                    pb_istream_t istream = pb_istream_from_buffer(resp_buf, resp_len);
+
+                    if (pb_decode(&istream, ts_crypto_AsymmetricEncryptOut_fields, &resp_msg)) {
+
+                        if (ciphertext_byte_array->size <= output_size) {
+
+                            memcpy(output, ciphertext_byte_array->bytes, ciphertext_byte_array->size);
+                            *output_length = ciphertext_byte_array->size;
+                        }
+                        else {
+                            /* Provided buffer is too small */
+                            psa_status = PSA_ERROR_BUFFER_TOO_SMALL;
+                        }
+                    }
+                    else {
+                        /* Failed to decode response message */
+                        psa_status = PSA_ERROR_GENERIC_ERROR;
+                    }
+
+                    ::free(ciphertext_byte_array);
+                }
+            }
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    ::free(plaintext_byte_array);
+    ::free(salt_byte_array);
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::asymmetric_decrypt(psa_key_handle_t handle, psa_algorithm_t alg,
+                        const uint8_t *input, size_t input_length,
+                        const uint8_t *salt, size_t salt_length,
+                        uint8_t *output, size_t output_size, size_t *output_length)
+{
+    size_t req_len;
+    pb_bytes_array_t *ciphertext_byte_array = pb_malloc_byte_array_containing_bytes(input, input_length);
+    pb_bytes_array_t *salt_byte_array = pb_malloc_byte_array_containing_bytes(salt, salt_length);
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_AsymmetricDecryptIn req_msg = ts_crypto_AsymmetricDecryptIn_init_default;
+
+    *output_length = 0;  /* For failure case */
+
+    req_msg.handle = handle;
+    req_msg.alg = alg;
+	req_msg.ciphertext = pb_out_byte_array(ciphertext_byte_array);
+    req_msg.salt = pb_out_byte_array(salt_byte_array);
+
+	if (pb_get_encoded_size(&req_len, ts_crypto_AsymmetricDecryptIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_AsymmetricDecryptIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                        ts_crypto_Opcode_ASYMMETRIC_DECRYPT, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) {
+
+                psa_status = opstatus;
+
+                if (psa_status == PSA_SUCCESS) {
+
+                    pb_bytes_array_t *plaintext_byte_array = pb_malloc_byte_array(output_size);
+                    ts_crypto_AsymmetricDecryptOut resp_msg = ts_crypto_AsymmetricDecryptOut_init_default;
+                    resp_msg.plaintext = pb_in_byte_array(plaintext_byte_array);
+
+                    pb_istream_t istream = pb_istream_from_buffer(resp_buf, resp_len);
+
+                    if (pb_decode(&istream, ts_crypto_AsymmetricDecryptOut_fields, &resp_msg)) {
+
+                        if (plaintext_byte_array->size <= output_size) {
+
+                            memcpy(output, plaintext_byte_array->bytes, plaintext_byte_array->size);
+                            *output_length = plaintext_byte_array->size;
+                        }
+                        else {
+                            /* Provided buffer is too small */
+                            m_err_rpc_status = PSA_ERROR_BUFFER_TOO_SMALL;
+                        }
+                    }
+                    else {
+                        /* Failed to decode response message */
+                        m_err_rpc_status = PSA_ERROR_GENERIC_ERROR;
+                    }
+
+                    ::free(plaintext_byte_array);
+                }
+            }
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    ::free(ciphertext_byte_array);
+    ::free(salt_byte_array);
+
+    return psa_status;
+}
+
+psa_status_t crypto_client::generate_random(uint8_t *output, size_t output_size)
+{
+    size_t req_len;
+    psa_status_t psa_status = PSA_ERROR_GENERIC_ERROR;
+    ts_crypto_GenerateRandomIn req_msg = ts_crypto_GenerateRandomIn_init_default;
+
+    req_msg.size = output_size;
+
+	if (pb_get_encoded_size(&req_len, ts_crypto_GenerateRandomIn_fields, &req_msg)) {
+
+        rpc_call_handle call_handle;
+        uint8_t *req_buf;
+
+        call_handle = rpc_caller_begin(m_caller, &req_buf, req_len);
+
+        if (call_handle) {
+
+            uint8_t *resp_buf;
+            size_t resp_len;
+            int opstatus;
+
+            pb_ostream_t ostream = pb_ostream_from_buffer(req_buf, req_len);
+            pb_encode(&ostream, ts_crypto_GenerateRandomIn_fields, &req_msg);
+
+            m_err_rpc_status = rpc_caller_invoke(m_caller, call_handle,
+                    ts_crypto_Opcode_GENERATE_RANDOM, &opstatus, &resp_buf, &resp_len);
+
+            if (m_err_rpc_status == TS_RPC_CALL_ACCEPTED) {
+
+                psa_status = opstatus;
+
+                if (psa_status == PSA_SUCCESS) {
+
+                    pb_bytes_array_t *output_byte_array = pb_malloc_byte_array(output_size);
+                    ts_crypto_GenerateRandomOut resp_msg = ts_crypto_GenerateRandomOut_init_default;
+                    resp_msg.random_bytes = pb_in_byte_array(output_byte_array);
+
+                    pb_istream_t istream = pb_istream_from_buffer(resp_buf, resp_len);
+
+                    if (pb_decode(&istream, ts_crypto_GenerateRandomOut_fields, &resp_msg)) {
+
+                        if (output_byte_array->size == output_size) {
+
+                            memcpy(output, output_byte_array->bytes, output_byte_array->size);
+                        }
+                        else {
+                            /* Mismatch between requested and generated length */
+                            psa_status = PSA_ERROR_GENERIC_ERROR;
+                        }
+                    }
+                    else {
+                        /* Failed to decode response message */
+                        psa_status = PSA_ERROR_GENERIC_ERROR;
+                    }
+
+                    ::free(output_byte_array);
+                }
+            }
+
+            rpc_caller_end(m_caller, call_handle);
+        }
+    }
+
+    return psa_status;
+}
+
+void crypto_client::translate_key_attributes(ts_crypto_KeyAttributes &proto_attributes,
+                            const psa_key_attributes_t &psa_attributes)
+{
+    proto_attributes.type = psa_get_key_type(&psa_attributes);
+    proto_attributes.key_bits = psa_get_key_bits(&psa_attributes);
+    proto_attributes.lifetime = psa_get_key_lifetime(&psa_attributes);
+    proto_attributes.id = psa_get_key_id(&psa_attributes);
+
+    proto_attributes.has_policy = true;
+    proto_attributes.policy.usage = psa_get_key_usage_flags(&psa_attributes);
+    proto_attributes.policy.alg = psa_get_key_algorithm(&psa_attributes);
+ }
diff --git a/components/service/crypto/client/cpp/crypto_client.h b/components/service/crypto/client/cpp/crypto_client.h
new file mode 100644
index 0000000..391f521
--- /dev/null
+++ b/components/service/crypto/client/cpp/crypto_client.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef CRYPTO_CLIENT_H
+#define CRYPTO_CLIENT_H
+
+#include <cstdint>
+#include <psa/crypto.h>
+#include <service/crypto/protobuf/key_attributes.pb.h>
+
+
+struct rpc_caller;
+
+/** Provides a client interface for accessing an instance of the PSA Crypto service.
+ **/
+class crypto_client
+{
+public:
+    crypto_client(struct rpc_caller *caller);
+    virtual ~crypto_client();
+
+    int err_rpc_status() const;
+
+    /* Key lifecycle methods */
+    psa_status_t generate_key(const psa_key_attributes_t *attributes, psa_key_handle_t *handle);
+    psa_status_t destroy_key(psa_key_handle_t handle);
+    psa_status_t open_key(psa_key_id_t id, psa_key_handle_t *handle);
+    psa_status_t close_key(psa_key_handle_t handle);
+    psa_status_t import_key(const psa_key_attributes_t *attributes,
+                            const uint8_t *data, size_t data_length, psa_key_handle_t *handle);
+
+    /* Key export methods */
+    psa_status_t export_key(psa_key_handle_t handle,
+                            uint8_t *data, size_t data_size,
+                            size_t *data_length);
+    psa_status_t export_public_key(psa_key_handle_t handle,
+                            uint8_t *data, size_t data_size, size_t *data_length);
+
+    /* Sign/verify methods */
+    psa_status_t sign_hash(psa_key_handle_t handle, psa_algorithm_t alg,
+                            const uint8_t *hash, size_t hash_length,
+                            uint8_t *signature, size_t signature_size, size_t *signature_length);
+    psa_status_t verify_hash(psa_key_handle_t handle, psa_algorithm_t alg,
+                            const uint8_t *hash, size_t hash_length,
+                            const uint8_t *signature, size_t signature_length);
+
+    /* Asymmetric encrypt/decrypt */
+    psa_status_t asymmetric_encrypt(psa_key_handle_t handle, psa_algorithm_t alg,
+                            const uint8_t *input, size_t input_length,
+                            const uint8_t *salt, size_t salt_length,
+                            uint8_t *output, size_t output_size, size_t *output_length);
+    psa_status_t asymmetric_decrypt(psa_key_handle_t handle, psa_algorithm_t alg,
+                            const uint8_t *input, size_t input_length,
+                            const uint8_t *salt, size_t salt_length,
+                            uint8_t *output, size_t output_size, size_t *output_length);
+
+    /* Random number generation */
+    psa_status_t generate_random(uint8_t *output, size_t output_size);
+
+protected:
+    crypto_client();
+    void set_caller(struct rpc_caller *caller) {m_caller = caller;}
+
+private:
+
+    void translate_key_attributes(ts_crypto_KeyAttributes &proto_attributes,
+                            const psa_key_attributes_t &psa_attributes);
+
+    struct rpc_caller *m_caller;
+    int m_err_rpc_status;
+};
+
+#endif /* CRYPTO_CLIENT_H */