EVP_CIPH_MODE
mode = ctx->cipher->flags & EVP_CIPH_MODE;
mode = ctx->cipher->flags & EVP_CIPH_MODE;
#define EVP_CIPHER_mode(e) (EVP_CIPHER_flags(e) & EVP_CIPH_MODE)
#define EVP_CIPHER_CTX_mode(e) (EVP_CIPHER_CTX_flags(e) & EVP_CIPH_MODE)