| // Copyright 2010 Google Inc. All Rights Reserved. |
| // Use of this source code is governed by an Apache-style license that can be |
| // found in the COPYING file. |
| // |
| // Uniitest for data encryption functions. |
| |
| #include "base/logging.h" |
| #include "testing/gmock/include/gmock/gmock.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| #include "rlz/lib/crc8.h" |
| |
| TEST(Crc8Unittest, TestCrc8) { |
| struct Data { |
| char string[10]; |
| // Externally calculated checksums use |
| // http://www.zorc.breitbandkatze.de/crc.html |
| // with the ATM HEC paramters: |
| // CRC-8, Polynomial 0x07, Initial value 0x00, Final XOR value 0x55 |
| // (direct, don't reverse data byes, don't reverse CRC before final XOR) |
| unsigned char external_crc; |
| int random_byte; |
| unsigned char corrupt_value; |
| } data[] = { |
| {"Google", 0x01, 2, 0x53}, |
| {"GOOGLE", 0xA6, 4, 0x11}, |
| {"My CRC 8!", 0xDC, 0, 0x50}, |
| }; |
| |
| unsigned char* bytes; |
| unsigned char crc; |
| bool matches; |
| int length; |
| for (size_t i = 0; i < sizeof(data) / sizeof(data[0]); ++i) { |
| bytes = reinterpret_cast<unsigned char*>(data[i].string); |
| crc = 0; |
| matches = false; |
| length = strlen(data[i].string); |
| |
| // Calculate CRC and compare against external value. |
| rlz_lib::Crc8::Generate(bytes, length, &crc); |
| EXPECT_TRUE(crc == data[i].external_crc); |
| rlz_lib::Crc8::Verify(bytes, length, crc, &matches); |
| EXPECT_TRUE(matches); |
| |
| // Corrupt string and see if CRC still matches. |
| data[i].string[data[i].random_byte] = data[i].corrupt_value; |
| rlz_lib::Crc8::Verify(bytes, length, crc, &matches); |
| EXPECT_FALSE(matches); |
| } |
| } |