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// Copyright (c) 2012 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 "crypto/secure_hash.h"
#include <string>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/pickle.h"
#include "crypto/sha2.h"
#include "testing/gtest/include/gtest/gtest.h"
TEST(SecureHashTest, TestUpdate) {
// Example B.3 from FIPS 180-2: long message.
std::string input3(500000, 'a'); // 'a' repeated half a million times
int expected3[] = { 0xcd, 0xc7, 0x6e, 0x5c,
0x99, 0x14, 0xfb, 0x92,
0x81, 0xa1, 0xc7, 0xe2,
0x84, 0xd7, 0x3e, 0x67,
0xf1, 0x80, 0x9a, 0x48,
0xa4, 0x97, 0x20, 0x0e,
0x04, 0x6d, 0x39, 0xcc,
0xc7, 0x11, 0x2c, 0xd0 };
uint8 output3[crypto::kSHA256Length];
scoped_ptr<crypto::SecureHash> ctx(crypto::SecureHash::Create(
crypto::SecureHash::SHA256));
ctx->Update(input3.data(), input3.size());
ctx->Update(input3.data(), input3.size());
ctx->Finish(output3, sizeof(output3));
for (size_t i = 0; i < crypto::kSHA256Length; i++)
EXPECT_EQ(expected3[i], static_cast<int>(output3[i]));
}
// Save the crypto state mid-stream, and create another instance with the
// saved state. Then feed the same data afterwards to both.
// When done, both should have the same hash value.
TEST(SecureHashTest, TestSerialization) {
std::string input1(10001, 'a'); // 'a' repeated 10001 times
std::string input2(10001, 'b'); // 'b' repeated 10001 times
std::string input3(10001, 'c'); // 'c' repeated 10001 times
std::string input4(10001, 'd'); // 'd' repeated 10001 times
std::string input5(10001, 'e'); // 'e' repeated 10001 times
uint8 output1[crypto::kSHA256Length];
uint8 output2[crypto::kSHA256Length];
scoped_ptr<crypto::SecureHash> ctx1(crypto::SecureHash::Create(
crypto::SecureHash::SHA256));
scoped_ptr<crypto::SecureHash> ctx2(crypto::SecureHash::Create(
crypto::SecureHash::SHA256));
Pickle pickle;
ctx1->Update(input1.data(), input1.size());
ctx1->Update(input2.data(), input2.size());
ctx1->Update(input3.data(), input3.size());
EXPECT_TRUE(ctx1->Serialize(&pickle));
ctx1->Update(input4.data(), input4.size());
ctx1->Update(input5.data(), input5.size());
ctx1->Finish(output1, sizeof(output1));
PickleIterator data_iterator(pickle);
EXPECT_TRUE(ctx2->Deserialize(&data_iterator));
ctx2->Update(input4.data(), input4.size());
ctx2->Update(input5.data(), input5.size());
ctx2->Finish(output2, sizeof(output2));
EXPECT_EQ(0, memcmp(output1, output2, crypto::kSHA256Length));
}
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