+ if (xform->auth.algo == RTE_CRYPTO_AUTH_AES_GMAC) {
+ if (xform->auth.op == RTE_CRYPTO_AUTH_OP_GENERATE) {
+ sess->cipher.direction = ENCRYPT;
+ sess->chain_order = CIPHER_HASH;
+ } else
+ sess->cipher.direction = DECRYPT;
+
+ sess->auth.algo = AES_GMAC;
+ /*
+ * Multi-buffer lib supports 8, 12 and 16 bytes of digest.
+ * If size requested is different, generate the full digest
+ * (16 bytes) in a temporary location and then memcpy
+ * the requested number of bytes.
+ */
+ if (sess->auth.req_digest_len != 16 &&
+ sess->auth.req_digest_len != 12 &&
+ sess->auth.req_digest_len != 8) {
+ sess->auth.gen_digest_len = 16;
+ } else {
+ sess->auth.gen_digest_len = sess->auth.req_digest_len;
+ }
+ sess->iv.length = xform->auth.iv.length;
+ sess->iv.offset = xform->auth.iv.offset;
+
+ switch (xform->auth.key.length) {
+ case AES_128_BYTES:
+ IMB_AES128_GCM_PRE(mb_mgr, xform->auth.key.data,
+ &sess->cipher.gcm_key);
+ sess->cipher.key_length_in_bytes = AES_128_BYTES;
+ break;
+ case AES_192_BYTES:
+ IMB_AES192_GCM_PRE(mb_mgr, xform->auth.key.data,
+ &sess->cipher.gcm_key);
+ sess->cipher.key_length_in_bytes = AES_192_BYTES;
+ break;
+ case AES_256_BYTES:
+ IMB_AES256_GCM_PRE(mb_mgr, xform->auth.key.data,
+ &sess->cipher.gcm_key);
+ sess->cipher.key_length_in_bytes = AES_256_BYTES;
+ break;
+ default:
+ RTE_LOG(ERR, PMD, "failed to parse test type\n");
+ return -EINVAL;
+ }
+
+ return 0;
+ }