public static (bool success, string message) ProcessCommand(string[] args)
{
if (args.Length < 2)
{
return(false, "Arguments are missing: <algorithm> <file path> [expected hash]");
}
var algorithmArg = args[0];
if (!Enum.TryParse(algorithmArg, true, out ChecksumAlgorithm algorithm))
{
return(false, $"{algorithmArg} is not a supported algorithm.");
}
var fileToCheck = args[1];
if (!File.Exists(fileToCheck))
{
return(false, $"File '{fileToCheck}' does not exist.");
}
if (args.Length > 2)
{
var expectedHash = args[2];
var(hashMatches, _) = ChecksumChecker.CheckFile(fileToCheck, expectedHash, algorithm);
return(hashMatches, hashMatches ? "File hash matches expected hash." : "File hash does not matches expected hash.");
}
var computedHash = ChecksumChecker.ComputeFileHash(fileToCheck, algorithm);
if (computedHash == null)
{
return(false, "Could not compute file hash.");
}
var hashString = HexConvert.ToString(computedHash);
return(true, $"Hash of file '{fileToCheck}' is '{hashString}'.");
}
public static (bool hashMatches, byte[]? computedHash) CheckFile(string filePath, string expectedHashString, ChecksumAlgorithm algorithm)
{
return(CheckFile(filePath, HexConvert.FromString(expectedHashString), algorithm));
}