public static PwgError Generate(out ProtectedString psOut,
PwProfile pwProfile, byte[] pbUserEntropy,
CustomPwGeneratorPool pwAlgorithmPool)
{
Debug.Assert(pwProfile != null);
if(pwProfile == null) throw new ArgumentNullException("pwProfile");
PwgError e = PwgError.Unknown;
CryptoRandomStream crs = null;
byte[] pbKey = null;
try
{
crs = CreateRandomStream(pbUserEntropy, out pbKey);
if(pwProfile.GeneratorType == PasswordGeneratorType.CharSet)
e = CharSetBasedGenerator.Generate(out psOut, pwProfile, crs);
else if(pwProfile.GeneratorType == PasswordGeneratorType.Pattern)
e = PatternBasedGenerator.Generate(out psOut, pwProfile, crs);
else if(pwProfile.GeneratorType == PasswordGeneratorType.Custom)
e = GenerateCustom(out psOut, pwProfile, crs, pwAlgorithmPool);
else { Debug.Assert(false); psOut = ProtectedString.Empty; }
}
finally
{
if(crs != null) crs.Dispose();
if(pbKey != null) MemUtil.ZeroByteArray(pbKey);
}
return e;
}
private ProtectedString CreatePassword()
{
ProtectedString pw = new ProtectedString();
PwProfile pf = new PwProfile();
pf.GeneratorType = PasswordGeneratorType.Pattern;
//use 256bit Hex-Key-Profile
pf.Pattern = "h{64}";
CustomPwGeneratorPool pwGenPool = new CustomPwGeneratorPool();
PwgError perr = PwGenerator.Generate(out pw, pf, null, pwGenPool);
if (perr != PwgError.Success)
{
throw new Exception("Error while creating new password!");
}
return(pw);
}
public static PwgError Generate(ProtectedString psOutBuffer,
PwProfile pwProfile, byte[] pbUserEntropy,
CustomPwGeneratorPool pwAlgorithmPool)
{
Debug.Assert(psOutBuffer != null);
if(psOutBuffer == null) throw new ArgumentNullException("psOutBuffer");
Debug.Assert(pwProfile != null);
if(pwProfile == null) throw new ArgumentNullException("pwProfile");
psOutBuffer.Clear();
CryptoRandomStream crs = CreateCryptoStream(pbUserEntropy);
PwgError e = PwgError.Unknown;
if(pwProfile.GeneratorType == PasswordGeneratorType.CharSet)
e = CharSetBasedGenerator.Generate(psOutBuffer, pwProfile, crs);
else if(pwProfile.GeneratorType == PasswordGeneratorType.Pattern)
e = PatternBasedGenerator.Generate(psOutBuffer, pwProfile, crs);
else if(pwProfile.GeneratorType == PasswordGeneratorType.Custom)
e = GenerateCustom(psOutBuffer, pwProfile, crs, pwAlgorithmPool);
else { Debug.Assert(false); }
return e;
}
private static PwgError GenerateCustom(out ProtectedString psOut,
PwProfile pwProfile, CryptoRandomStream crs,
CustomPwGeneratorPool pwAlgorithmPool)
{
psOut = ProtectedString.Empty;
Debug.Assert(pwProfile.GeneratorType == PasswordGeneratorType.Custom);
if(pwAlgorithmPool == null) return PwgError.UnknownAlgorithm;
string strID = pwProfile.CustomAlgorithmUuid;
if(string.IsNullOrEmpty(strID)) { Debug.Assert(false); return PwgError.UnknownAlgorithm; }
byte[] pbUuid = Convert.FromBase64String(strID);
PwUuid uuid = new PwUuid(pbUuid);
CustomPwGenerator pwg = pwAlgorithmPool.Find(uuid);
if(pwg == null) { Debug.Assert(false); return PwgError.UnknownAlgorithm; }
ProtectedString pwd = pwg.Generate(pwProfile.CloneDeep(), crs);
if(pwd == null) return PwgError.Unknown;
psOut = pwd;
return PwgError.Success;
}
