ECDSA_SIGN_MAGIC
MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == ECDSA_SIGN_MAGIC), ret, err)
ctx->sign_data.ecdsa.magic = ECDSA_SIGN_MAGIC;
MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == ECDSA_SIGN_MAGIC), ret, err)