internal static bool PrepareCharSet(PwCharSet pwCharSet, PwProfile pwProfile) { uint cc = pwCharSet.Size; for (uint i = 0; i < cc; ++i) { char ch = pwCharSet[i]; if ((ch == char.MinValue) || (ch == '\t') || (ch == '\r') || (ch == '\n') || char.IsSurrogate(ch)) { return(false); } } if (pwProfile.ExcludeLookAlike) { pwCharSet.Remove(PwCharSet.LookAlike); } if (!string.IsNullOrEmpty(pwProfile.ExcludeCharacters)) { pwCharSet.Remove(pwProfile.ExcludeCharacters); } return(true); }
internal static void PrepareCharSet(PwCharSet pwCharSet, PwProfile pwProfile) { pwCharSet.Remove(PwCharSet.Invalid); if (pwProfile.ExcludeLookAlike) { pwCharSet.Remove(PwCharSet.LookAlike); } if (pwProfile.ExcludeCharacters.Length > 0) { pwCharSet.Remove(pwProfile.ExcludeCharacters); } }
private void Initialize(bool bFullInitialize) { Clear(); if (!bFullInitialize) { return; } if (m_strHighAnsi == null) { StringBuilder sbHighAnsi = new StringBuilder(); // [U+0080, U+009F] are C1 control characters, // U+00A0 is non-breaking space for (char ch = '\u00A1'; ch <= '\u00AC'; ++ch) { sbHighAnsi.Append(ch); } // U+00AD is soft hyphen (format character) for (char ch = '\u00AE'; ch < '\u00FF'; ++ch) { sbHighAnsi.Append(ch); } sbHighAnsi.Append('\u00FF'); m_strHighAnsi = sbHighAnsi.ToString(); } if (m_strSpecial == null) { PwCharSet pcs = new PwCharSet(false); pcs.AddRange('!', '/'); pcs.AddRange(':', '@'); pcs.AddRange('[', '`'); pcs.Add(@"|~"); pcs.Remove(@"-_ "); pcs.Remove(PwCharSet.Brackets); m_strSpecial = pcs.ToString(); } }
internal static PwgError Generate(out ProtectedString psOut, PwProfile pwProfile, CryptoRandomStream crsRandomSource) { psOut = ProtectedString.Empty; if (pwProfile.Length == 0) { return(PwgError.Success); } PwCharSet pcs = new PwCharSet(pwProfile.CharSet.ToString()); if (!PwGenerator.PrepareCharSet(pcs, pwProfile)) { return(PwgError.InvalidCharSet); } char[] v = new char[pwProfile.Length]; try { for (int i = 0; i < v.Length; ++i) { char ch = PwGenerator.GenerateCharacter(pcs, crsRandomSource); if (ch == char.MinValue) { return(PwgError.TooFewCharacters); } v[i] = ch; if (pwProfile.NoRepeatingCharacters) { pcs.Remove(ch); } } byte[] pbUtf8 = StrUtil.Utf8.GetBytes(v); psOut = new ProtectedString(true, pbUtf8); MemUtil.ZeroByteArray(pbUtf8); } finally { MemUtil.ZeroArray <char>(v); } return(PwgError.Success); }
internal static char GenerateCharacter(PwProfile pwProfile, PwCharSet pwCharSet, CryptoRandomStream crsRandomSource) { if (pwCharSet.Size == 0) { return(char.MinValue); } ulong uIndex = crsRandomSource.GetRandomUInt64(); uIndex %= (ulong)pwCharSet.Size; char ch = pwCharSet[(uint)uIndex]; if (pwProfile.NoRepeatingCharacters) { pwCharSet.Remove(ch); } return(ch); }
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); MemUtil.ZeroArray <char>(vArray); vGenerated.Clear(); return(PwgError.Success); }
internal static PwgError Generate(out ProtectedString psOut, PwProfile pwProfile, CryptoRandomStream crsRandomSource) { psOut = ProtectedString.Empty; string strPattern = pwProfile.Pattern; if (string.IsNullOrEmpty(strPattern)) { return(PwgError.Success); } CharStream cs = new CharStream(strPattern); LinkedList <char> llGenerated = new LinkedList <char>(); PwCharSet pcs = new PwCharSet(); while (true) { char ch = cs.ReadChar(); if (ch == char.MinValue) { break; } pcs.Clear(); if (ch == '\\') { ch = cs.ReadChar(); if (ch == char.MinValue) { return(PwgError.InvalidPattern); } pcs.Add(ch); // Allow "{...}" support and char check } else if (ch == '[') { if (!ReadCustomCharSet(cs, pcs)) { return(PwgError.InvalidPattern); } } else { if (!pcs.AddCharSet(ch)) { return(PwgError.InvalidPattern); } } int nCount = 1; if (cs.PeekChar() == '{') { nCount = ReadCount(cs); if (nCount < 0) { return(PwgError.InvalidPattern); } } for (int i = 0; i < nCount; ++i) { if (!PwGenerator.PrepareCharSet(pcs, pwProfile)) { return(PwgError.InvalidCharSet); } if (pwProfile.NoRepeatingCharacters) { foreach (char chUsed in llGenerated) { pcs.Remove(chUsed); } } char chGen = PwGenerator.GenerateCharacter(pcs, crsRandomSource); if (chGen == char.MinValue) { return(PwgError.TooFewCharacters); } llGenerated.AddLast(chGen); } } if (llGenerated.Count == 0) { return(PwgError.Success); } char[] v = new char[llGenerated.Count]; llGenerated.CopyTo(v, 0); if (pwProfile.PatternPermutePassword) { PwGenerator.Shuffle(v, crsRandomSource); } byte[] pbUtf8 = StrUtil.Utf8.GetBytes(v); psOut = new ProtectedString(true, pbUtf8); MemUtil.ZeroByteArray(pbUtf8); MemUtil.ZeroArray <char>(v); return(PwgError.Success); }
private static bool ReadCustomCharSet(CharStream cs, PwCharSet pcsOut) { Debug.Assert(cs.PeekChar() != '['); // Consumed already Debug.Assert(pcsOut.Size == 0); bool bAdd = true; while (true) { char ch = cs.ReadChar(); if (ch == char.MinValue) { return(false); } if (ch == ']') { break; } if (ch == '\\') { ch = cs.ReadChar(); if (ch == char.MinValue) { return(false); } if (bAdd) { pcsOut.Add(ch); } else { pcsOut.Remove(ch); } } else if (ch == '^') { if (bAdd) { bAdd = false; } else { return(false); // '^' toggles the mode only once } } else { PwCharSet pcs = new PwCharSet(); if (!pcs.AddCharSet(ch)) { return(false); } if (bAdd) { pcsOut.Add(pcs.ToString()); } else { pcsOut.Remove(pcs.ToString()); } } } return(true); }