private ChecksumResult CalculateEDC15VMChecksum(string filename, byte[] allBytes, bool verifyOnly, out ChecksumResultDetails result)
{
ChecksumResult res = new ChecksumResult();
result = new ChecksumResultDetails();
result.CalculationResult = ChecksumResult.ChecksumFail; // default = failed
result.TypeResult = ChecksumType.VAG_EDC15VM_V41;
if (/*allBytes.Length != 0x40000 && */allBytes.Length != 0x80000 && allBytes.Length != 0x100000) return res;
if (allBytes.Length >= 0x80000)
{
if (allBytes[0x50008] == 'V' && allBytes[0x50009] == '4' && allBytes[0x5000A] == '.' && allBytes[0x5000B] == '1')
{
// checksum V4.1 rev.1
result.TypeResult = ChecksumType.VAG_EDC15VM_V41;
}
else if (allBytes[0x58008] == 'V' && allBytes[0x58009] == '4' && allBytes[0x5800A] == '.' && allBytes[0x5800B] == '1')
{
// checksum V4.1 rev.2
result.TypeResult = ChecksumType.VAG_EDC15VM_V41V2;
}
}
//allBytes = reverseEndian(allBytes);
EDC15VM_checksum chks = new EDC15VM_checksum();
if (result.TypeResult == ChecksumType.VAG_EDC15VM_V41)
{
res = chks.tdi41_checksum_search(allBytes, (uint)allBytes.Length, false);
}
else
{
res = chks.tdi41v2_checksum_search(allBytes, (uint)allBytes.Length, false);
}
result.NumberChecksumsTotal = chks.ChecksumsFound;
result.NumberChecksumsFail = chks.ChecksumsIncorrect;
result.NumberChecksumsOk = chks.ChecksumsFound - chks.ChecksumsIncorrect;
if (res == ChecksumResult.ChecksumOK)
{
Console.WriteLine("Checksum V4.1 matched");
result.CalculationOk = true;
}
else if (res == ChecksumResult.ChecksumFail)
{
Console.WriteLine("UpdateChecksum: Checksum failed " + filename);
if (!verifyOnly)
{
File.WriteAllBytes(filename, allBytes);
result.CalculationOk = true;
Console.WriteLine("UpdateChecksum: Checksum fixed");
}
}
else if (res == ChecksumResult.ChecksumTypeError)
{
result.TypeResult = ChecksumType.VAG_EDC15VM_V41_2002;
EDC15VM_checksum chks2002 = new EDC15VM_checksum();
allBytes = File.ReadAllBytes(filename);
ChecksumResult res2002 = chks2002.tdi41_2002_checksum_search(allBytes, (uint)allBytes.Length, false);
result.NumberChecksumsTotal = chks2002.ChecksumsFound;
result.NumberChecksumsFail = chks2002.ChecksumsIncorrect;
result.NumberChecksumsOk = chks2002.ChecksumsFound - chks2002.ChecksumsIncorrect;
if (res2002 == ChecksumResult.ChecksumOK)
{
Console.WriteLine("Checksum 2002 matched " + filename);
result.CalculationOk = true;
}
else if (res2002 == ChecksumResult.ChecksumFail)
{
Console.WriteLine("UpdateChecksum: Checksum 2002 failed " + filename);
if (!verifyOnly)
{
File.WriteAllBytes(filename, allBytes);
result.CalculationOk = true;
Console.WriteLine("UpdateChecksum: Checksum fixed");
}
}
else if (res2002 == ChecksumResult.ChecksumTypeError)
{
// unknown checksum type
result.CalculationOk = false;
result.CalculationResult = ChecksumResult.ChecksumTypeError;
result.TypeResult = ChecksumType.Unknown;
}
}
return res;
}
