protected override int Execute(CmdLineInput input)
{
var inPath = input.Args.GetSingle("file");
var buffer = File.ReadAllBytes(inPath);
var algorithmName = input.Options.GetSingle("algorithm").GetSingle("name");
var algorithm = SymmetricAlgorithm.Create(algorithmName);
var credentials = GetCredentials(input);
var iterations = int.Parse(input.Options.GetSingle("iterations").GetSingle("count"));
var legalKeySize = algorithm.LegalKeySizes.Single();
algorithm.Key = GetBytes(credentials.Password, legalKeySize.MinSize, legalKeySize.MaxSize);
var legalBlockSize = algorithm.LegalBlockSizes.Single();
algorithm.IV = GetBytes(credentials.Salt, legalBlockSize.MinSize, legalBlockSize.MaxSize);
var cryptoTransform = GetCryptoTransform(algorithm);
for (var i = 0; i < iterations; i++)
{
buffer = cryptoTransform.TransformFinalBlock(buffer, 0, buffer.Length);
}
var outPath = GetOutputPath(inPath,input);
File.WriteAllBytes(outPath, buffer);
return 0;
}
private static Credentials GetCredentials(CmdLineInput input)
{
var credentials = new Credentials();
CmdLineOption cmdLineOption;
if (input.Options.TryGetSingle("password", out cmdLineOption))
{
credentials.Password = cmdLineOption.GetSingle("value");
credentials.Salt = input.Options.TryGetSingle("salt", out cmdLineOption)
? cmdLineOption.GetSingle("salt")
: string.Empty;
return credentials;
}
credentials.Password = PromptFor("Password");
credentials.Salt = PromptFor("Salt");
return credentials;
}
private string GetOutputPath(string inPath, CmdLineInput input)
{
CmdLineOption option;
return input.Options.TryGetSingle("output", out option)
? option.GetSingle("path")
: GetOutputPath(inPath);
}