crypto/secure_hash_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "crypto/secure_hash.h"
   6
   7 #include <string>
   8
   9 #include "base/basictypes.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/pickle.h"
  12 #include "crypto/sha2.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14
  15 TEST(SecureHashTest, TestUpdate) {
  16   // Example B.3 from FIPS 180-2: long message.
  17   std::string input3(500000, 'a');  // 'a' repeated half a million times
  18   int expected3[] = { 0xcd, 0xc7, 0x6e, 0x5c,
  19                       0x99, 0x14, 0xfb, 0x92,
  20                       0x81, 0xa1, 0xc7, 0xe2,
  21                       0x84, 0xd7, 0x3e, 0x67,
  22                       0xf1, 0x80, 0x9a, 0x48,
  23                       0xa4, 0x97, 0x20, 0x0e,
  24                       0x04, 0x6d, 0x39, 0xcc,
  25                       0xc7, 0x11, 0x2c, 0xd0 };
  26
  27   uint8 output3[crypto::kSHA256Length];
  28
  29   scoped_ptr<crypto::SecureHash> ctx(crypto::SecureHash::Create(
  30       crypto::SecureHash::SHA256));
  31   ctx->Update(input3.data(), input3.size());
  32   ctx->Update(input3.data(), input3.size());
  33
  34   ctx->Finish(output3, sizeof(output3));
  35   for (size_t i = 0; i < crypto::kSHA256Length; i++)
  36     EXPECT_EQ(expected3[i], static_cast<int>(output3[i]));
  37 }
  38
  39 // Save the crypto state mid-stream, and create another instance with the
  40 // saved state.  Then feed the same data afterwards to both.
  41 // When done, both should have the same hash value.
  42 TEST(SecureHashTest, TestSerialization) {
  43   std::string input1(10001, 'a');  // 'a' repeated 10001 times
  44   std::string input2(10001, 'b');  // 'b' repeated 10001 times
  45   std::string input3(10001, 'c');  // 'c' repeated 10001 times
  46   std::string input4(10001, 'd');  // 'd' repeated 10001 times
  47   std::string input5(10001, 'e');  // 'e' repeated 10001 times
  48
  49   uint8 output1[crypto::kSHA256Length];
  50   uint8 output2[crypto::kSHA256Length];
  51
  52   scoped_ptr<crypto::SecureHash> ctx1(crypto::SecureHash::Create(
  53       crypto::SecureHash::SHA256));
  54   scoped_ptr<crypto::SecureHash> ctx2(crypto::SecureHash::Create(
  55       crypto::SecureHash::SHA256));
  56   base::Pickle pickle;
  57   ctx1->Update(input1.data(), input1.size());
  58   ctx1->Update(input2.data(), input2.size());
  59   ctx1->Update(input3.data(), input3.size());
  60
  61   EXPECT_TRUE(ctx1->Serialize(&pickle));
  62   ctx1->Update(input4.data(), input4.size());
  63   ctx1->Update(input5.data(), input5.size());
  64
  65   ctx1->Finish(output1, sizeof(output1));
  66
  67   base::PickleIterator data_iterator(pickle);
  68   EXPECT_TRUE(ctx2->Deserialize(&data_iterator));
  69   ctx2->Update(input4.data(), input4.size());
  70   ctx2->Update(input5.data(), input5.size());
  71
  72   ctx2->Finish(output2, sizeof(output2));
  73
  74   EXPECT_EQ(0, memcmp(output1, output2, crypto::kSHA256Length));
  75 }