internal static PwgError Generate(out ProtectedString psOut,
PwProfile pwProfile, CryptoRandomStream crsRandomSource)
{
psOut = ProtectedString.Empty;
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 == '^')
{
ch = csStream.ReadChar();
if (ch == char.MinValue) // ^ at the end
{
vGenerated.AddLast('^');
break;
}
if (bInCharSetDef)
{
pcsCustom.Remove(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 = StrUtil.Utf8.GetBytes(vArray);
psOut = new ProtectedString(true, pbUtf8);
MemUtil.ZeroByteArray(pbUtf8);
Array.Clear(vArray, 0, vArray.Length);
vGenerated.Clear();
return(PwgError.Success);
}
public static PwProfile DeriveFromPassword(ProtectedString psPassword)
{
PwProfile pp = new PwProfile();
Debug.Assert(psPassword != null); if (psPassword == null)
{
return(pp);
}
byte[] pbUtf8 = psPassword.ReadUtf8();
char[] vChars = StrUtil.Utf8.GetChars(pbUtf8);
pp.GeneratorType = PasswordGeneratorType.CharSet;
pp.Length = (uint)vChars.Length;
PwCharSet pcs = pp.CharSet;
pcs.Clear();
foreach (char ch in vChars)
{
if ((ch >= 'A') && (ch <= 'Z'))
{
pcs.Add(PwCharSet.UpperCase);
}
else if ((ch >= 'a') && (ch <= 'z'))
{
pcs.Add(PwCharSet.LowerCase);
}
else if ((ch >= '0') && (ch <= '9'))
{
pcs.Add(PwCharSet.Digits);
}
else if (PwCharSet.SpecialChars.IndexOf(ch) >= 0)
{
pcs.Add(PwCharSet.SpecialChars);
}
else if (ch == ' ')
{
pcs.Add(' ');
}
else if (ch == '-')
{
pcs.Add('-');
}
else if (ch == '_')
{
pcs.Add('_');
}
else if (PwCharSet.Brackets.IndexOf(ch) >= 0)
{
pcs.Add(PwCharSet.Brackets);
}
else if (PwCharSet.HighAnsiChars.IndexOf(ch) >= 0)
{
pcs.Add(PwCharSet.HighAnsiChars);
}
else
{
pcs.Add(ch);
}
}
Array.Clear(vChars, 0, vChars.Length);
MemUtil.ZeroByteArray(pbUtf8);
return(pp);
}
