core: add support for SM2 using MBed TLS
The SM2 algorithms (PKE, KEP and DSA) are currently implemented using
LibTomCrypt. They are automatically disabled when MBed TLS is selected
as the core crypto library (that is, when CFG_CRYPTOLIB_NAME=mbedtls
CFG_CRYPTOLIB_DIR=lib/libmbedtls).
This commit removes this restriction by porting the relevant files
(core/lib/libtomcrypt/sm2-{dsa,kep,pke}.c) over to the MBed TLS API in
lib/libmbedtls/core.
Signed-off-by: Jerome Forissier <jerome@forissier.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
diff --git a/lib/libmbedtls/include/mbedtls_config_kernel.h b/lib/libmbedtls/include/mbedtls_config_kernel.h
index 51a78f3..cd4d975 100644
--- a/lib/libmbedtls/include/mbedtls_config_kernel.h
+++ b/lib/libmbedtls/include/mbedtls_config_kernel.h
@@ -111,6 +111,10 @@
#define MBEDTLS_ECDSA_C
#define MBEDTLS_ECDH_C
#define MBEDTLS_ECDH_LEGACY_CONTEXT
+#if defined(CFG_CRYPTO_DSA) || defined(CFG_CRYPTO_SM2_PKE) || \
+ defined(CFG_CRYPTO_SM2_KEP)
+#define MBEDTLS_ECP_DP_SM2_ENABLED
+#endif
#endif
#endif /*CFG_CRYPTOLIB_NAME_mbedtls*/