espressif: fix RSA sign build after MbedTLS version update

Add missing files from external MbedTLS.

Signed-off-by: Almir Okato <almir.okato@espressif.com>
Signed-off-by: David Brown <david.brown@linaro.org>

Author: almir-okato

boot/espressif/include/crypto_config/mbedtls_custom_config.h

@@ -133,7 +133,7 @@
  *
  * Comment if your system does not support time functions
  */
-#define MBEDTLS_HAVE_TIME
+// #define MBEDTLS_HAVE_TIME
 
 /**
  * \def MBEDTLS_HAVE_TIME_DATE
@@ -154,7 +154,7 @@
  * mbedtls_platform_gmtime_r() at compile-time by using the macro
  * MBEDTLS_PLATFORM_GMTIME_R_ALT.
  */
-#define MBEDTLS_HAVE_TIME_DATE
+// #define MBEDTLS_HAVE_TIME_DATE
 
 /**
  * \def MBEDTLS_PLATFORM_MEMORY

boot/espressif/include/crypto_config/rsa.cmake

@@ -14,6 +14,8 @@ if (DEFINED CONFIG_ESP_USE_MBEDTLS)
         ${MBEDTLS_DIR}/library/sha256.c
         ${MBEDTLS_DIR}/library/rsa.c
         ${MBEDTLS_DIR}/library/bignum.c
+        ${MBEDTLS_DIR}/library/bignum_core.c
+        ${MBEDTLS_DIR}/library/constant_time.c
         ${MBEDTLS_DIR}/library/asn1parse.c
         ${MBEDTLS_DIR}/library/md.c
         ${MBEDTLS_DIR}/library/memory_buffer_alloc.c