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); }