IPSEC: support GCM in ESP

[vpp.git] / src / plugins / crypto_openssl / main.c

diff --git a/src/plugins/crypto_openssl/main.c b/src/plugins/crypto_openssl/main.c
index 9b741bb..ac586c2 100644 (file)
--- a/src/plugins/crypto_openssl/main.c
+++ b/src/plugins/crypto_openssl/main.c
@@ -115,14 +115,18 @@ openssl_ops_enc_gcm (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops,
   for (i = 0; i < n_ops; i++)
     {
       vnet_crypto_op_t *op = ops[i];
+      u32 nonce[3];
       int len;
 
       if (op->flags & VNET_CRYPTO_OP_FLAG_INIT_IV)
-       RAND_bytes (op->iv, op->iv_len);
+       RAND_bytes (op->iv, 8);
+
+      nonce[0] = op->salt;
+      clib_memcpy_fast (nonce + 1, op->iv, 8);
 
       EVP_EncryptInit_ex (ctx, cipher, 0, 0, 0);
-      EVP_CIPHER_CTX_ctrl (ctx, EVP_CTRL_GCM_SET_IVLEN, op->iv_len, NULL);
-      EVP_EncryptInit_ex (ctx, 0, 0, op->key, op->iv);
+      EVP_CIPHER_CTX_ctrl (ctx, EVP_CTRL_GCM_SET_IVLEN, 12, NULL);
+      EVP_EncryptInit_ex (ctx, 0, 0, op->key, (u8 *) nonce);
       if (op->aad_len)
        EVP_EncryptUpdate (ctx, NULL, &len, op->aad, op->aad_len);
       EVP_EncryptUpdate (ctx, op->dst, &len, op->src, op->len);
@@ -140,7 +144,7 @@ openssl_ops_dec_gcm (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops,
   openssl_per_thread_data_t *ptd = vec_elt_at_index (per_thread_data,
                                                     vm->thread_index);
   EVP_CIPHER_CTX *ctx = ptd->evp_cipher_ctx;
-  u32 i;
+  u32 i, n_fail = 0;
   for (i = 0; i < n_ops; i++)
     {
       vnet_crypto_op_t *op = ops[i];
@@ -157,9 +161,12 @@ openssl_ops_dec_gcm (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops,
       if (EVP_DecryptFinal_ex (ctx, op->dst + len, &len) > 0)
        op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
       else
-       op->status = VNET_CRYPTO_OP_STATUS_FAIL_DECRYPT;
+       {
+         n_fail++;
+         op->status = VNET_CRYPTO_OP_STATUS_FAIL_DECRYPT;
+       }
     }
-  return n_ops;
+  return n_ops - n_fail;
 }
 
 static_always_inline u32