void CRC32Test::testGetValue() {
// test methods of java.util.zip.crc32.getValue()
CRC32 crc;
CPPUNIT_ASSERT_EQUAL_MESSAGE( "getValue() should return a zero as a result of constructing a CRC32 instance",
0LL, crc.getValue() );
crc.reset();
crc.update( Integer::MAX_VALUE );
// Ran JDK and discovered that the value of the CRC should be
// 4278190080
CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(max) failed to update the checksum to the correct value ",
4278190080LL, crc.getValue() );
crc.reset();
std::vector<unsigned char> byteEmpty( 10000, 0 );
crc.update( byteEmpty );
// Ran JDK and discovered that the value of the CRC should be
// 1295764014
CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(byte[]) failed to update the checksum to the correct value ",
1295764014LL, crc.getValue() );
crc.reset();
crc.update( 1 );
// Ran JDK and discovered that the value of the CRC should be
// 2768625435
// CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(int) failed to update the checksum to the correct
// value ",2768625435L, crc.getValue());
crc.reset();
CPPUNIT_ASSERT_EQUAL_MESSAGE( "reset failed to reset the checksum value to zero",
0LL, crc.getValue());
}
void CRC32Test::testUpdateArrayIndexed() {
static const int SIZE = 3;
unsigned char byteArray[] = {1, 2, 3};
CRC32 crc;
int off = 2;// accessing the 2nd element of byteArray
int len = 1;
int lenError = 3;
int offError = 4;
crc.update( byteArray, SIZE, off, len );
// Ran JDK and discovered that the value of the CRC should be
// 1259060791
CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(unsigned char[],int,int) failed to update the checksum to the correct value ",
1259060791LL, crc.getValue() );
CPPUNIT_ASSERT_THROW_MESSAGE(
"Should have thrown an IndexOutOfBoundsException for lenError",
crc.update( byteArray, SIZE, off, lenError ),
IndexOutOfBoundsException );
CPPUNIT_ASSERT_THROW_MESSAGE(
"Should have thrown an IndexOutOfBoundsException for offError",
crc.update( byteArray, SIZE, offError, len ),
IndexOutOfBoundsException );
}
void CRC32Test::testUpdateI() {
CRC32 crc;
crc.update( 1 );
// Ran JDK and discovered that the value of the CRC should be
// 2768625435
CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(1) failed to update the checksum to the correct value ",
2768625435LL, crc.getValue() );
crc.reset();
crc.update( Integer::MAX_VALUE );
// Ran JDK and discovered that the value of the CRC should be
// 4278190080
CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(max) failed to update the checksum to the correct value ",
4278190080LL, crc.getValue() );
crc.reset();
crc.update( Integer::MIN_VALUE );
// Ran JDK and discovered that the value of the CRC should be
// 3523407757
CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(min) failed to update the checksum to the correct value ",
3523407757LL, crc.getValue() );
}
//! A CRC-32 is calculated over the load data, including any pad bytes
//! that are required in the last data cipher block. Including the
//! pad bytes in the CRC makes it vastly easier for the ROM to calculate
//! the CRC for validation.
uint32_t EncoreBootImage::LoadCommand::calculateCRC() const
{
uint32_t result;
CRC32 crc;
crc.update(m_data, m_length);
if (m_padCount)
{
// include random padding in the CRC
crc.update(m_padding, m_padCount);
}
crc.truncatedFinal(reinterpret_cast<uint8_t*>(&result), sizeof(result));
return result;
}
void CRC32Test::testUpdateArray() {
unsigned char byteArray[] = { 1, 2 };
CRC32 crc;
crc.update( byteArray, 2, 0, 2 );
// Ran JDK and discovered that the value of the CRC should be
// 3066839698
CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(unsigned char[]) failed to update the checksum to the correct value ",
3066839698LL, crc.getValue() );
crc.reset();
std::vector<unsigned char> byteEmpty( 10000, 0 );
crc.update( byteEmpty );
// Ran JDK and discovered that the value of the CRC should be
// 1295764014
CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(unsigned char[]) failed to update the checksum to the correct value ",
1295764014LL, crc.getValue() );
}
void CRC32Test::testReset() {
CRC32 crc;
crc.update( 1 );
// Ran JDK and discovered that the value of the CRC should be
// 2768625435
CPPUNIT_ASSERT_EQUAL_MESSAGE( "update(int) failed to update the checksum to the correct value ",
2768625435LL, crc.getValue() );
crc.reset();
CPPUNIT_ASSERT_EQUAL_MESSAGE( "reset failed to reset the checksum value to zero",
0LL, crc.getValue() );
}
