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 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);
}
