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net/quic/crypto/aes_128_gcm_12_decrypter_test.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/crypto/aes_128_gcm_12_decrypter.h"
 
 #include "net/quic/test_tools/quic_test_utils.h"
 
 using base::StringPiece;
 using std::string;
@@ skipping 239 matching lines @@
 
 namespace net {
 namespace test {
 
 // DecryptWithNonce wraps the |Decrypt| method of |decrypter| to allow passing
 // in an nonce and also to allocate the buffer needed for the plaintext.
 QuicData* DecryptWithNonce(Aes128Gcm12Decrypter* decrypter,
                            StringPiece nonce,
                            StringPiece associated_data,
                            StringPiece ciphertext) {
-  size_t plaintext_size = ciphertext.length();
-  scoped_ptr<char[]> plaintext(new char[plaintext_size]);
-
-  if (!decrypter->Decrypt(nonce, associated_data, ciphertext,
-                          reinterpret_cast<unsigned char*>(plaintext.get()),
-                          &plaintext_size)) {
-    return nullptr;
-  }
-  return new QuicData(plaintext.release(), plaintext_size, true);
+  QuicPacketSequenceNumber sequence_number;
+  StringPiece nonce_prefix(nonce.data(),
+                           nonce.size() - sizeof(sequence_number));
+  decrypter->SetNoncePrefix(nonce_prefix);
+  memcpy(&sequence_number, nonce.data() + nonce_prefix.size(),
+         sizeof(sequence_number));
+  return decrypter->DecryptPacket(sequence_number, associated_data, ciphertext);
 }
 
 TEST(Aes128Gcm12DecrypterTest, Decrypt) {
   for (size_t i = 0; i < arraysize(test_group_array); i++) {
     SCOPED_TRACE(i);
     const TestVector* test_vectors = test_group_array[i];
     const TestGroupInfo& test_info = test_group_info[i];
     for (size_t j = 0; test_vectors[j].key != nullptr; j++) {
       // If not present then decryption is expected to fail.
       bool has_pt = test_vectors[j].pt;
@@ skipping 49 matching lines @@
 
       ASSERT_EQ(pt.length(), decrypted->length());
       test::CompareCharArraysWithHexError("plaintext", decrypted->data(),
                                           pt.length(), pt.data(), pt.length());
     }
   }
 }
 
 }  // namespace test
 }  // namespace net