public static PwgError Generate(ProtectedString psOutBuffer,
PwProfile pwProfile, CryptoRandomStream crsRandomSource)
{
if(pwProfile.Length == 0) return PwgError.Success;
PwCharSet pcs = new PwCharSet(pwProfile.CharSet.ToString());
char[] vGenerated = new char[pwProfile.Length];
PwGenerator.PrepareCharSet(pcs, pwProfile);
for(int nIndex = 0; nIndex < (int)pwProfile.Length; ++nIndex)
{
char ch = PwGenerator.GenerateCharacter(pwProfile, pcs,
crsRandomSource);
if(ch == char.MinValue)
{
Array.Clear(vGenerated, 0, vGenerated.Length);
return PwgError.TooFewCharacters;
}
vGenerated[nIndex] = ch;
}
byte[] pbUTF8 = Encoding.UTF8.GetBytes(vGenerated);
psOutBuffer.SetString(Encoding.UTF8.GetString(pbUTF8, 0, pbUTF8.Length));
Array.Clear(pbUTF8, 0, pbUTF8.Length);
Array.Clear(vGenerated, 0, vGenerated.Length);
return PwgError.Success;
}
public static PwgError Generate(ProtectedString psOutBuffer,
PwProfile pwProfile, CryptoRandomStream crsRandomSource)
{
LinkedList<char> vGenerated = new LinkedList<char>();
PwCharSet pcsCurrent = new PwCharSet();
PwCharSet pcsCustom = new PwCharSet();
PwCharSet pcsUsed = new PwCharSet();
bool bInCharSetDef = false;
string strPattern = ExpandPattern(pwProfile.Pattern);
if(strPattern.Length == 0) return PwgError.Success;
CharStream csStream = new CharStream(strPattern);
char ch = csStream.ReadChar();
while(ch != char.MinValue)
{
pcsCurrent.Clear();
bool bGenerateChar = false;
if(ch == '\\')
{
ch = csStream.ReadChar();
if(ch == char.MinValue) // Backslash at the end
{
vGenerated.AddLast('\\');
break;
}
if(bInCharSetDef) pcsCustom.Add(ch);
else
{
vGenerated.AddLast(ch);
pcsUsed.Add(ch);
}
}
else if(ch == '[')
{
pcsCustom.Clear();
bInCharSetDef = true;
}
else if(ch == ']')
{
pcsCurrent.Add(pcsCustom.ToString());
bInCharSetDef = false;
bGenerateChar = true;
}
else if(bInCharSetDef)
{
if(pcsCustom.AddCharSet(ch) == false)
pcsCustom.Add(ch);
}
else if(pcsCurrent.AddCharSet(ch) == false)
{
vGenerated.AddLast(ch);
pcsUsed.Add(ch);
}
else bGenerateChar = true;
if(bGenerateChar)
{
PwGenerator.PrepareCharSet(pcsCurrent, pwProfile);
if(pwProfile.NoRepeatingCharacters)
pcsCurrent.Remove(pcsUsed.ToString());
char chGen = PwGenerator.GenerateCharacter(pwProfile,
pcsCurrent, crsRandomSource);
if(chGen == char.MinValue) return PwgError.TooFewCharacters;
vGenerated.AddLast(chGen);
pcsUsed.Add(chGen);
}
ch = csStream.ReadChar();
}
if(vGenerated.Count == 0) return PwgError.Success;
char[] vArray = new char[vGenerated.Count];
vGenerated.CopyTo(vArray, 0);
if(pwProfile.PatternPermutePassword)
PwGenerator.ShufflePassword(vArray, crsRandomSource);
byte[] pbUtf8 = Encoding.UTF8.GetBytes(vArray);
psOutBuffer.SetString(Encoding.UTF8.GetString(pbUtf8, 0, pbUtf8.Length));
Array.Clear(pbUtf8, 0, pbUtf8.Length);
Array.Clear(vArray, 0, vArray.Length);
vGenerated.Clear();
return PwgError.Success;
}
private static PwgError GenerateCustom(ProtectedString psOutBuffer,
PwProfile pwProfile, CryptoRandomStream crs,
CustomPwGeneratorPool pwAlgorithmPool)
{
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;
psOutBuffer.SetString(pwd.ReadString());
return PwgError.Success;
}
