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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 // Uniitest for data encryption functions. | |
6 | |
7 #include "base/logging.h" | |
8 #include "testing/gmock/include/gmock/gmock.h" | |
9 #include "testing/gtest/include/gtest/gtest.h" | |
10 | |
11 #include "rlz/lib/crc8.h" | |
12 | |
13 TEST(Crc8Unittest, TestCrc8) { | |
14 struct Data { | |
15 char string[10]; | |
16 // Externally calculated checksums use | |
17 // http://www.zorc.breitbandkatze.de/crc.html | |
18 // with the ATM HEC paramters: | |
19 // CRC-8, Polynomial 0x07, Initial value 0x00, Final XOR value 0x55 | |
20 // (direct, don't reverse data byes, don't reverse CRC before final XOR) | |
21 unsigned char external_crc; | |
22 int random_byte; | |
23 unsigned char corrupt_value; | |
24 } data[] = { | |
25 {"Google", 0x01, 2, 0x53}, | |
26 {"GOOGLE", 0xA6, 4, 0x11}, | |
27 {"My CRC 8!", 0xDC, 0, 0x50}, | |
28 }; | |
29 | |
30 unsigned char* bytes; | |
31 unsigned char crc; | |
32 bool matches; | |
33 int length; | |
34 for (size_t i = 0; i < sizeof(data) / sizeof(data[0]); ++i) { | |
35 bytes = reinterpret_cast<unsigned char*>(data[i].string); | |
36 crc = 0; | |
37 matches = false; | |
38 length = strlen(data[i].string); | |
39 | |
40 // Calculate CRC and compare against external value. | |
41 rlz_lib::Crc8::Generate(bytes, length, &crc); | |
42 EXPECT_TRUE(crc == data[i].external_crc); | |
43 rlz_lib::Crc8::Verify(bytes, length, crc, &matches); | |
44 EXPECT_TRUE(matches); | |
45 | |
46 // Corrupt string and see if CRC still matches. | |
47 data[i].string[data[i].random_byte] = data[i].corrupt_value; | |
48 rlz_lib::Crc8::Verify(bytes, length, crc, &matches); | |
49 EXPECT_FALSE(matches); | |
50 } | |
51 } | |
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