private static bool VerifyFile(FileInfo file, string checksum)
{
using (SHA1CryptoServiceProvider crypto = new SHA1CryptoServiceProvider())
{
var buffer = File.ReadAllBytes(file.FullName);
var hash = ZsyncUtil.ByteToHex(crypto.ComputeHash(buffer));
return(hash == checksum);
}
}
public static void Make(FileInfo file)
{
//var blockSize = 2048;
var fileLength = file.Length;
var blockSize = CalculateBlocksize(file.Length);
var sequenceMatches = fileLength > blockSize ? 2 : 1;
var weakChecksumLength = CalculateWeakChecksumLength(fileLength, blockSize, sequenceMatches);
var strongCheckSumLength = CalculateStrongChecksumLength(fileLength, blockSize, sequenceMatches);
var checkSums = ComputeCheckSums(file, blockSize, fileLength, weakChecksumLength, strongCheckSumLength);
var mtime = File.GetLastWriteTimeUtc(file.FullName);
var header = new Header(ZsyncVersion, file.Name, mtime, blockSize, fileLength, sequenceMatches,
weakChecksumLength, strongCheckSumLength, null, ZsyncUtil.ByteToHex(checkSums.sha1));
var zsyncFile = new FileInfo(file.FullName + ".zsync");
WriteFile(header, new MemoryStream(checkSums.checksums), zsyncFile);
}