commit e954d6b5795c15b6eb5a4dfcd8957b150ab99f6a
author David Hu <david.hu@arm.com> Thu Apr 23 13:06:00 2020 +0800
committer David Hu <david.hu@arm.com> Thu May 28 16:49:52 2020 +0800
tree 81a0a088818d6731b148f42b526ca1112d0a1b8f
parent c1a80cb3b4abac304104d4c2e55a7043b36a5059

Crypto: Add alternatives of mbed-crypto implementations

Select MBEDTLS_AES_SETKEY_DEC_ALT and MBEDTLS_AES_DECRYPT_ALTA when
AES-CCM is selected.

Add emtpy wrappers of mbedtls_internal_aes_decrypt() and
mbedtls_aes_setkey_dec() to replace mbed-crypto implementation when
the MBEDTLS_AES_SETKEY_DEC_ALT and MBEDTLS_AES_DECRYPT_ALTA are
enabled in AES-CCM mode. It can decrease memory footprint.

Add description of tfm_mbedcrypto_alt.c in Crypto document.

Change-Id: I3b9071735bfd6bafea8189dfde153d6050aefe27
Signed-off-by: David Hu <david.hu@arm.com>

secure_fw/services/crypto/CMakeLists.inc

diff --git a/secure_fw/services/crypto/CMakeLists.inc b/secure_fw/services/crypto/CMakeLists.inc
index c6bb1f8..09c53bb 100644
--- a/secure_fw/services/crypto/CMakeLists.inc
+++ b/secure_fw/services/crypto/CMakeLists.inc
@@ -53,6 +53,10 @@
                     "${CRYPTO_DIR}/tfm_crypto_secure_api.c"
       )
 
+  if (CRYPTO_ENGINE_MBEDTLS)
+    list(APPEND CRYPTO_C_SRC "${CRYPTO_DIR}/tfm_mbedcrypto_alt.c")
+  endif()
+
   #Append all our source files to global lists.
   list(APPEND ALL_SRC_C ${CRYPTO_C_SRC})
   unset(CRYPTO_C_SRC)