CRYPTO_gcm128_new
LCRYPTO_USED(CRYPTO_gcm128_new);
LCRYPTO_ALIAS(CRYPTO_gcm128_new);
GCM128_CONTEXT *CRYPTO_gcm128_new(void *key, block128_f block);
if ((ctx = CRYPTO_gcm128_new(&key, (block128_f)AES_encrypt)) == NULL)
GCM128_CONTEXT *ctx = CRYPTO_gcm128_new(&aes_ks1, (block128_f) AES_encrypt);