KeePassLib finally portable (but version 2.19)

Windows Store project stub

ModernKeePassLib/Cryptography/PasswordGenerator/CharSetBasedGenerator.cs

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+/*
+  KeePass Password Safe - The Open-Source Password Manager
+  Copyright (C) 2003-2012 Dominik Reichl <dominik.reichl@t-online.de>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Diagnostics;
+
+using ModernKeePassLib.Security;
+using ModernKeePassLib.Utility;
+
+namespace ModernKeePassLib.Cryptography.PasswordGenerator
+{
+	internal static class CharSetBasedGenerator
+	{
+		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());
+			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 = StrUtil.Utf8.GetBytes(vGenerated);
+			psOut = new ProtectedString(true, pbUtf8);
+			MemUtil.ZeroByteArray(pbUtf8);
+			Array.Clear(vGenerated, 0, vGenerated.Length);
+
+			return PwgError.Success;
+		}
+	}
+}

ModernKeePassLib/Cryptography/PasswordGenerator/CustomPwGenerator.cs

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+/*
+  KeePass Password Safe - The Open-Source Password Manager
+  Copyright (C) 2003-2012 Dominik Reichl <dominik.reichl@t-online.de>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using ModernKeePassLib;
+using ModernKeePassLib.Security;
+
+namespace ModernKeePassLib.Cryptography.PasswordGenerator
+{
+	public abstract class CustomPwGenerator
+	{
+		/// <summary>
+		/// Each custom password generation algorithm must have
+		/// its own unique UUID.
+		/// </summary>
+		public abstract PwUuid Uuid { get; }
+
+		/// <summary>
+		/// Displayable name of the password generation algorithm.
+		/// </summary>
+		public abstract string Name { get; }
+
+		public virtual bool SupportsOptions
+		{
+			get { return false; }
+		}
+
+		/// <summary>
+		/// Password generation function.
+		/// </summary>
+		/// <param name="prf">Password generation options chosen
+		/// by the user. This may be <c>null</c>, if the default
+		/// options should be used.</param>
+		/// <param name="crsRandomSource">Source that the algorithm
+		/// can use to generate random numbers.</param>
+		/// <returns>Generated password or <c>null</c> in case
+		/// of failure. If returning <c>null</c>, the caller assumes
+		/// that an error message has already been shown to the user.</returns>
+		public abstract ProtectedString Generate(PwProfile prf,
+			CryptoRandomStream crsRandomSource);
+
+		public virtual string GetOptions(string strCurrentOptions)
+		{
+			return string.Empty;
+		}
+	}
+}

ModernKeePassLib/Cryptography/PasswordGenerator/CustomPwGeneratorPool.cs

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+/*
+  KeePass Password Safe - The Open-Source Password Manager
+  Copyright (C) 2003-2012 Dominik Reichl <dominik.reichl@t-online.de>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ModernKeePassLib.Cryptography.PasswordGenerator
+{
+	public sealed class CustomPwGeneratorPool : IEnumerable<CustomPwGenerator>
+	{
+		private List<CustomPwGenerator> m_vGens = new List<CustomPwGenerator>();
+
+		public int Count
+		{
+			get { return m_vGens.Count; }
+		}
+
+		public CustomPwGeneratorPool()
+		{
+		}
+
+		IEnumerator IEnumerable.GetEnumerator()
+		{
+			return m_vGens.GetEnumerator();
+		}
+
+		public IEnumerator<CustomPwGenerator> GetEnumerator()
+		{
+			return m_vGens.GetEnumerator();
+		}
+
+		public void Add(CustomPwGenerator pwg)
+		{
+			if(pwg == null) throw new ArgumentNullException("pwg");
+
+			PwUuid uuid = pwg.Uuid;
+			if(uuid == null) throw new ArgumentException();
+
+			int nIndex = FindIndex(uuid);
+
+			if(nIndex >= 0) m_vGens[nIndex] = pwg; // Replace
+			else m_vGens.Add(pwg);
+		}
+
+		public CustomPwGenerator Find(PwUuid uuid)
+		{
+			if(uuid == null) throw new ArgumentNullException("uuid");
+
+			foreach(CustomPwGenerator pwg in m_vGens)
+			{
+				if(uuid.EqualsValue(pwg.Uuid)) return pwg;
+			}
+
+			return null;
+		}
+
+		public CustomPwGenerator Find(string strName)
+		{
+			if(strName == null) throw new ArgumentNullException("strName");
+
+			foreach(CustomPwGenerator pwg in m_vGens)
+			{
+				if(pwg.Name == strName) return pwg;
+			}
+
+			return null;
+		}
+
+		private int FindIndex(PwUuid uuid)
+		{
+			if(uuid == null) throw new ArgumentNullException("uuid");
+
+			for(int i = 0; i < m_vGens.Count; ++i)
+			{
+				if(uuid.EqualsValue(m_vGens[i].Uuid)) return i;
+			}
+
+			return -1;
+		}
+
+		public bool Remove(PwUuid uuid)
+		{
+			if(uuid == null) throw new ArgumentNullException("uuid");
+
+			int nIndex = FindIndex(uuid);
+			if(nIndex < 0) return false;
+
+			m_vGens.RemoveAt(nIndex);
+			return true;
+		}
+	}
+}

ModernKeePassLib/Cryptography/PasswordGenerator/PatternBasedGenerator.cs

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+/*
+  KeePass Password Safe - The Open-Source Password Manager
+  Copyright (C) 2003-2012 Dominik Reichl <dominik.reichl@t-online.de>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Diagnostics;
+
+using ModernKeePassLib.Security;
+using ModernKeePassLib.Utility;
+
+namespace ModernKeePassLib.Cryptography.PasswordGenerator
+{
+	internal static class PatternBasedGenerator
+	{
+		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 == '[')
+				{
+					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;
+		}
+
+		private static string ExpandPattern(string strPattern)
+		{
+			Debug.Assert(strPattern != null); if(strPattern == null) return string.Empty;
+			string str = strPattern;
+
+			while(true)
+			{
+				int nOpen = FindFirstUnescapedChar(str, '{');
+				int nClose = FindFirstUnescapedChar(str, '}');
+
+				if((nOpen >= 0) && (nOpen < nClose))
+				{
+					string strCount = str.Substring(nOpen + 1, nClose - nOpen - 1);
+					str = str.Remove(nOpen, nClose - nOpen + 1);
+
+					uint uRepeat;
+					if(StrUtil.TryParseUInt(strCount, out uRepeat) && (nOpen >= 1))
+					{
+						if(uRepeat == 0)
+							str = str.Remove(nOpen - 1, 1);
+						else
+							str = str.Insert(nOpen, new string(str[nOpen - 1], (int)uRepeat - 1));
+					}
+				}
+				else break;
+			}
+
+			return str;
+		}
+
+		private static int FindFirstUnescapedChar(string str, char ch)
+		{
+			for(int i = 0; i < str.Length; ++i)
+			{
+				char chCur = str[i];
+
+				if(chCur == '\\') ++i; // Next is escaped, skip it
+				else if(chCur == ch) return i;
+			}
+
+			return -1;
+		}
+	}
+}

ModernKeePassLib/Cryptography/PasswordGenerator/PwCharSet.cs

@@ -0,0 +1,318 @@
+/*
+  KeePass Password Safe - The Open-Source Password Manager
+  Copyright (C) 2003-2012 Dominik Reichl <dominik.reichl@t-online.de>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Diagnostics;
+
+namespace ModernKeePassLib.Cryptography.PasswordGenerator
+{
+	public sealed class PwCharSet
+	{
+		public const string UpperCase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+		public const string LowerCase = "abcdefghijklmnopqrstuvwxyz";
+		public const string Digits = "0123456789";
+
+		public const string UpperConsonants = "BCDFGHJKLMNPQRSTVWXYZ";
+		public const string LowerConsonants = "bcdfghjklmnpqrstvwxyz";
+		public const string UpperVowels = "AEIOU";
+		public const string LowerVowels = "aeiou";
+
+		public const string Punctuation = @",.;:";
+		public const string Brackets = @"[]{}()<>";
+
+		public const string PrintableAsciiSpecial = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~";
+
+		public const string UpperHex = "0123456789ABCDEF";
+		public const string LowerHex = "0123456789abcdef";
+
+		public const string Invalid = "\t\r\n";
+		public const string LookAlike = @"O0l1I|";
+
+		private const int CharTabSize = (0x10000 / 8);
+
+		private List<char> m_vChars = new List<char>();
+		private byte[] m_vTab = new byte[CharTabSize];
+
+		private string m_strHighAnsi = string.Empty;
+		private string m_strSpecial = string.Empty;
+
+		/// <summary>
+		/// Create a new, empty character set collection object.
+		/// </summary>
+		public PwCharSet()
+		{
+			this.Initialize(true);
+		}
+
+		public PwCharSet(string strCharSet)
+		{
+			this.Initialize(true);
+			this.Add(strCharSet);
+		}
+
+		private PwCharSet(bool bFullInitialize)
+		{
+			this.Initialize(bFullInitialize);
+		}
+
+		private void Initialize(bool bFullInitialize)
+		{
+			this.Clear();
+
+			if(bFullInitialize == false) return;
+
+			StringBuilder sbHighAnsi = new StringBuilder();
+			for(char ch = '~'; ch < 255; ++ch)
+				sbHighAnsi.Append(ch);
+			m_strHighAnsi = sbHighAnsi.ToString();
+
+			PwCharSet pcs = new PwCharSet(false);
+			pcs.AddRange('!', '/');
+			pcs.AddRange(':', '@');
+			pcs.AddRange('[', '`');
+			pcs.Remove(@"-_ ");
+			pcs.Remove(PwCharSet.Brackets);
+			m_strSpecial = pcs.ToString();
+		}
+
+		/// <summary>
+		/// Number of characters in this set.
+		/// </summary>
+		public uint Size
+		{
+			get { return (uint)m_vChars.Count; }
+		}
+
+		/// <summary>
+		/// Get a character of the set using an index.
+		/// </summary>
+		/// <param name="uPos">Index of the character to get.</param>
+		/// <returns>Character at the specified position. If the index is invalid,
+		/// an <c>ArgumentOutOfRangeException</c> is thrown.</returns>
+		public char this[uint uPos]
+		{
+			get
+			{
+				if(uPos >= (uint)m_vChars.Count)
+					throw new ArgumentOutOfRangeException("uPos");
+
+				return m_vChars[(int)uPos];
+			}
+		}
+
+		public string SpecialChars { get { return m_strSpecial; } }
+		public string HighAnsiChars { get { return m_strHighAnsi; } }
+
+		/// <summary>
+		/// Remove all characters from this set.
+		/// </summary>
+		public void Clear()
+		{
+			m_vChars.Clear();
+			Array.Clear(m_vTab, 0, m_vTab.Length);
+		}
+
+		public bool Contains(char ch)
+		{
+			return (((m_vTab[ch / 8] >> (ch % 8)) & 1) != char.MinValue);
+		}
+
+		public bool Contains(string strCharacters)
+		{
+			Debug.Assert(strCharacters != null);
+			if(strCharacters == null) throw new ArgumentNullException("strCharacters");
+
+			foreach(char ch in strCharacters)
+			{
+				if(this.Contains(ch) == false) return false;
+			}
+
+			return true;
+		}
+
+		/// <summary>
+		/// Add characters to the set.
+		/// </summary>
+		/// <param name="ch">Character to add.</param>
+		public void Add(char ch)
+		{
+			if(ch == char.MinValue) { Debug.Assert(false); return; }
+
+			if(this.Contains(ch) == false)
+			{
+				m_vChars.Add(ch);
+				m_vTab[ch / 8] |= (byte)(1 << (ch % 8));
+			}
+		}
+
+		/// <summary>
+		/// Add characters to the set.
+		/// </summary>
+		/// <param name="strCharSet">String containing characters to add.</param>
+		public void Add(string strCharSet)
+		{
+			Debug.Assert(strCharSet != null);
+			if(strCharSet == null) throw new ArgumentNullException("strCharSet");
+
+			m_vChars.Capacity = m_vChars.Count + strCharSet.Length;
+
+			foreach(char ch in strCharSet)
+				this.Add(ch);
+		}
+
+		public void Add(string strCharSet1, string strCharSet2)
+		{
+			this.Add(strCharSet1);
+			this.Add(strCharSet2);
+		}
+
+		public void Add(string strCharSet1, string strCharSet2, string strCharSet3)
+		{
+			this.Add(strCharSet1);
+			this.Add(strCharSet2);
+			this.Add(strCharSet3);
+		}
+
+		public void AddRange(char chMin, char chMax)
+		{
+			m_vChars.Capacity = m_vChars.Count + (chMax - chMin) + 1;
+
+			for(char ch = chMin; ch < chMax; ++ch)
+				this.Add(ch);
+
+			this.Add(chMax);
+		}
+
+		public bool AddCharSet(char chCharSetIdentifier)
+		{
+			bool bResult = true;
+
+			switch(chCharSetIdentifier)
+			{
+				case 'a': this.Add(PwCharSet.LowerCase, PwCharSet.Digits); break;
+				case 'A': this.Add(PwCharSet.LowerCase, PwCharSet.UpperCase,
+					PwCharSet.Digits); break;
+				case 'U': this.Add(PwCharSet.UpperCase, PwCharSet.Digits); break;
+				case 'c': this.Add(PwCharSet.LowerConsonants); break;
+				case 'C': this.Add(PwCharSet.LowerConsonants,
+					PwCharSet.UpperConsonants); break;
+				case 'z': this.Add(PwCharSet.UpperConsonants); break;
+				case 'd': this.Add(PwCharSet.Digits); break; // Digit
+				case 'h': this.Add(PwCharSet.LowerHex); break;
+				case 'H': this.Add(PwCharSet.UpperHex); break;
+				case 'l': this.Add(PwCharSet.LowerCase); break;
+				case 'L': this.Add(PwCharSet.LowerCase, PwCharSet.UpperCase); break;
+				case 'u': this.Add(PwCharSet.UpperCase); break;
+				case 'p': this.Add(PwCharSet.Punctuation); break;
+				case 'b': this.Add(PwCharSet.Brackets); break;
+				case 's': this.Add(PwCharSet.PrintableAsciiSpecial); break;
+				case 'S': this.Add(PwCharSet.UpperCase, PwCharSet.LowerCase);
+					this.Add(PwCharSet.Digits, PwCharSet.PrintableAsciiSpecial); break;
+				case 'v': this.Add(PwCharSet.LowerVowels); break;
+				case 'V': this.Add(PwCharSet.LowerVowels, PwCharSet.UpperVowels); break;
+				case 'Z': this.Add(PwCharSet.UpperVowels); break;
+				case 'x': this.Add(m_strHighAnsi); break;
+				default: bResult = false; break;
+			}
+
+			return bResult;
+		}
+
+		public bool Remove(char ch)
+		{
+			m_vTab[ch / 8] &= (byte)~(1 << (ch % 8));
+			return m_vChars.Remove(ch);
+		}
+
+		public bool Remove(string strCharacters)
+		{
+			Debug.Assert(strCharacters != null);
+			if(strCharacters == null) throw new ArgumentNullException("strCharacters");
+
+			bool bResult = true;
+			foreach(char ch in strCharacters)
+			{
+				if(!Remove(ch)) bResult = false;
+			}
+
+			return bResult;
+		}
+
+		public bool RemoveIfAllExist(string strCharacters)
+		{
+			Debug.Assert(strCharacters != null);
+			if(strCharacters == null) throw new ArgumentNullException("strCharacters");
+
+			if(this.Contains(strCharacters) == false)
+				return false;
+
+			return this.Remove(strCharacters);
+		}
+
+		/// <summary>
+		/// Convert the character set to a string containing all its characters.
+		/// </summary>
+		/// <returns>String containing all character set characters.</returns>
+		public override string ToString()
+		{
+			StringBuilder sb = new StringBuilder();
+			foreach(char ch in m_vChars)
+				sb.Append(ch);
+
+			return sb.ToString();
+		}
+
+		public string PackAndRemoveCharRanges()
+		{
+			StringBuilder sb = new StringBuilder();
+
+			sb.Append(this.RemoveIfAllExist(PwCharSet.UpperCase) ? 'U' : '_');
+			sb.Append(this.RemoveIfAllExist(PwCharSet.LowerCase) ? 'L' : '_');
+			sb.Append(this.RemoveIfAllExist(PwCharSet.Digits) ? 'D' : '_');
+			sb.Append(this.RemoveIfAllExist(m_strSpecial) ? 'S' : '_');
+			sb.Append(this.RemoveIfAllExist(PwCharSet.Punctuation) ? 'P' : '_');
+			sb.Append(this.RemoveIfAllExist(@"-") ? 'm' : '_');
+			sb.Append(this.RemoveIfAllExist(@"_") ? 'u' : '_');
+			sb.Append(this.RemoveIfAllExist(@" ") ? 's' : '_');
+			sb.Append(this.RemoveIfAllExist(PwCharSet.Brackets) ? 'B' : '_');
+			sb.Append(this.RemoveIfAllExist(m_strHighAnsi) ? 'H' : '_');
+
+			return sb.ToString();
+		}
+
+		public void UnpackCharRanges(string strRanges)
+		{
+			if(strRanges == null) { Debug.Assert(false); return; }
+			if(strRanges.Length < 10) { Debug.Assert(false); return; }
+
+			if(strRanges[0] != '_') this.Add(PwCharSet.UpperCase);
+			if(strRanges[1] != '_') this.Add(PwCharSet.LowerCase);
+			if(strRanges[2] != '_') this.Add(PwCharSet.Digits);
+			if(strRanges[3] != '_') this.Add(m_strSpecial);
+			if(strRanges[4] != '_') this.Add(PwCharSet.Punctuation);
+			if(strRanges[5] != '_') this.Add('-');
+			if(strRanges[6] != '_') this.Add('_');
+			if(strRanges[7] != '_') this.Add(' ');
+			if(strRanges[8] != '_') this.Add(PwCharSet.Brackets);
+			if(strRanges[9] != '_') this.Add(m_strHighAnsi);
+		}
+	}
+}

ModernKeePassLib/Cryptography/PasswordGenerator/PwGenerator.cs

@@ -0,0 +1,146 @@
+/*
+  KeePass Password Safe - The Open-Source Password Manager
+  Copyright (C) 2003-2012 Dominik Reichl <dominik.reichl@t-online.de>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Diagnostics;
+
+using ModernKeePassLib.Security;
+
+namespace ModernKeePassLib.Cryptography.PasswordGenerator
+{
+	public enum PwgError
+	{
+		Success = 0,
+		Unknown = 1,
+		TooFewCharacters = 2,
+		UnknownAlgorithm = 3
+	}
+
+	/// <summary>
+	/// Utility functions for generating random passwords.
+	/// </summary>
+	public static class PwGenerator
+	{
+		public static PwgError Generate(out ProtectedString psOut,
+			PwProfile pwProfile, byte[] pbUserEntropy,
+			CustomPwGeneratorPool pwAlgorithmPool)
+		{
+			Debug.Assert(pwProfile != null);
+			if(pwProfile == null) throw new ArgumentNullException("pwProfile");
+
+			CryptoRandomStream crs = CreateCryptoStream(pbUserEntropy);
+			PwgError e = PwgError.Unknown;
+
+			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; }
+
+			return e;
+		}
+
+		private static CryptoRandomStream CreateCryptoStream(byte[] pbAdditionalEntropy)
+		{
+			byte[] pbKey = CryptoRandom.Instance.GetRandomBytes(256);
+
+			// Mix in additional entropy
+			if((pbAdditionalEntropy != null) && (pbAdditionalEntropy.Length > 0))
+			{
+				for(int nKeyPos = 0; nKeyPos < pbKey.Length; ++nKeyPos)
+					pbKey[nKeyPos] ^= pbAdditionalEntropy[nKeyPos % pbAdditionalEntropy.Length];
+			}
+
+			return new CryptoRandomStream(CrsAlgorithm.Salsa20, pbKey);
+		}
+
+		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 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);
+		}
+
+		internal static void ShufflePassword(char[] pPassword,
+			CryptoRandomStream crsRandomSource)
+		{
+			Debug.Assert(pPassword != null); if(pPassword == null) return;
+			Debug.Assert(crsRandomSource != null); if(crsRandomSource == null) return;
+
+			if(pPassword.Length <= 1) return; // Nothing to shuffle
+
+			for(int nSelect = 0; nSelect < pPassword.Length; ++nSelect)
+			{
+				ulong uRandomIndex = crsRandomSource.GetRandomUInt64();
+				uRandomIndex %= (ulong)(pPassword.Length - nSelect);
+
+				char chTemp = pPassword[nSelect];
+				pPassword[nSelect] = pPassword[nSelect + (int)uRandomIndex];
+				pPassword[nSelect + (int)uRandomIndex] = chTemp;
+			}
+		}
+
+		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;
+		}
+	}
+}

ModernKeePassLib/Cryptography/PasswordGenerator/PwProfile.cs

@@ -0,0 +1,274 @@
+/*
+  KeePass Password Safe - The Open-Source Password Manager
+  Copyright (C) 2003-2012 Dominik Reichl <dominik.reichl@t-online.de>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+using System;
+using System.ComponentModel;
+using System.Xml.Serialization;
+
+using ModernKeePassLib.Interfaces;
+using ModernKeePassLib.Security;
+using ModernKeePassLib.Utility;
+
+namespace ModernKeePassLib.Cryptography.PasswordGenerator
+{
+    /// <summary>
+    /// Type of the password generator. Different types like generators
+    /// based on given patterns, based on character sets, etc. are
+    /// available.
+    /// </summary>
+    public enum PasswordGeneratorType
+	{
+		/// <summary>
+		/// Generator based on character spaces/sets, i.e. groups
+		/// of characters like lower-case, upper-case or numeric characters.
+		/// </summary>
+		CharSet = 0,
+
+		/// <summary>
+		/// Password generation based on a pattern. The user has provided
+		/// a pattern, which describes how the generated password has to
+		/// look like.
+		/// </summary>
+		Pattern = 1,
+
+		Custom = 2
+	}
+
+	public sealed class PwProfile : IDeepCloneable<PwProfile>
+	{
+		private string m_strName = string.Empty;
+		[DefaultValue("")]
+		public string Name
+		{
+			get { return m_strName; }
+			set { m_strName = value; }
+		}
+
+		private PasswordGeneratorType m_type = PasswordGeneratorType.CharSet;
+		public PasswordGeneratorType GeneratorType
+		{
+			get { return m_type; }
+			set { m_type = value; }
+		}
+
+		private bool m_bUserEntropy = false;
+		[DefaultValue(false)]
+		public bool CollectUserEntropy
+		{
+			get { return m_bUserEntropy; }
+			set { m_bUserEntropy = value; }
+		}
+
+		private uint m_uLength = 20;
+		public uint Length
+		{
+			get { return m_uLength; }
+			set { m_uLength = value; }
+		}
+
+		private PwCharSet m_pwCharSet = new PwCharSet(PwCharSet.UpperCase +
+			PwCharSet.LowerCase + PwCharSet.Digits);
+		[XmlIgnore]
+		public PwCharSet CharSet
+		{
+			get { return m_pwCharSet; }
+			set
+			{
+				if(value == null) throw new ArgumentNullException("value");
+				m_pwCharSet = value;
+			}
+		}
+
+		private string m_strCharSetRanges = string.Empty;
+		[DefaultValue("")]
+		public string CharSetRanges
+		{
+			get { this.UpdateCharSet(true); return m_strCharSetRanges; }
+			set
+			{
+				if(value == null) throw new ArgumentNullException("value");
+				m_strCharSetRanges = value;
+				this.UpdateCharSet(false);
+			}
+		}
+
+		private string m_strCharSetAdditional = string.Empty;
+		[DefaultValue("")]
+		public string CharSetAdditional
+		{
+			get { this.UpdateCharSet(true); return m_strCharSetAdditional; }
+			set
+			{
+				if(value == null) throw new ArgumentNullException("value");
+				m_strCharSetAdditional = value;
+				this.UpdateCharSet(false);
+			}
+		}
+
+		private string m_strPattern = string.Empty;
+		[DefaultValue("")]
+		public string Pattern
+		{
+			get { return m_strPattern; }
+			set { m_strPattern = value; }
+		}
+
+		private bool m_bPatternPermute = false;
+		[DefaultValue(false)]
+		public bool PatternPermutePassword
+		{
+			get { return m_bPatternPermute; }
+			set { m_bPatternPermute = value; }
+		}
+
+		private bool m_bNoLookAlike = false;
+		[DefaultValue(false)]
+		public bool ExcludeLookAlike
+		{
+			get { return m_bNoLookAlike; }
+			set { m_bNoLookAlike = value; }
+		}
+
+		private bool m_bNoRepeat = false;
+		[DefaultValue(false)]
+		public bool NoRepeatingCharacters
+		{
+			get { return m_bNoRepeat; }
+			set { m_bNoRepeat = value; }
+		}
+
+		private string m_strExclude = string.Empty;
+		[DefaultValue("")]
+		public string ExcludeCharacters
+		{
+			get { return m_strExclude; }
+			set
+			{
+				if(value == null) throw new ArgumentNullException("value");
+				m_strExclude = value;
+			}
+		}
+
+		private string m_strCustomID = string.Empty;
+		[DefaultValue("")]
+		public string CustomAlgorithmUuid
+		{
+			get { return m_strCustomID; }
+			set
+			{
+				if(value == null) throw new ArgumentNullException("value");
+				m_strCustomID = value;
+			}
+		}
+
+		private string m_strCustomOpt = string.Empty;
+		[DefaultValue("")]
+		public string CustomAlgorithmOptions
+		{
+			get { return m_strCustomOpt; }
+			set
+			{
+				if(value == null) throw new ArgumentNullException("value");
+				m_strCustomOpt = value;
+			}
+		}
+
+		public PwProfile()
+		{
+		}
+
+		public PwProfile CloneDeep()
+		{
+			PwProfile p = new PwProfile();
+
+			p.m_strName = m_strName;
+			p.m_type = m_type;
+			p.m_bUserEntropy = m_bUserEntropy;
+			p.m_uLength = m_uLength;
+			p.m_pwCharSet = new PwCharSet(m_pwCharSet.ToString());
+			p.m_strCharSetRanges = m_strCharSetRanges;
+			p.m_strCharSetAdditional = m_strCharSetAdditional;
+			p.m_strPattern = m_strPattern;
+			p.m_bPatternPermute = m_bPatternPermute;
+			p.m_bNoLookAlike = m_bNoLookAlike;
+			p.m_bNoRepeat = m_bNoRepeat;
+			p.m_strExclude = m_strExclude;
+			p.m_strCustomID = m_strCustomID;
+			p.m_strCustomOpt = m_strCustomOpt;
+
+			return p;
+		}
+
+		private void UpdateCharSet(bool bSetXml)
+		{
+			if(bSetXml)
+			{
+				PwCharSet pcs = new PwCharSet(m_pwCharSet.ToString());
+				m_strCharSetRanges = pcs.PackAndRemoveCharRanges();
+				m_strCharSetAdditional = pcs.ToString();
+			}
+			else
+			{
+				PwCharSet pcs = new PwCharSet(m_strCharSetAdditional);
+				pcs.UnpackCharRanges(m_strCharSetRanges);
+				m_pwCharSet = pcs;
+			}
+		}
+
+		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((@"!#$%&'*+,./:;=?@^").IndexOf(ch) >= 0) pcs.Add(pcs.SpecialChars);
+				else if(ch == ' ') pcs.Add(' ');
+				else if(ch == '-') pcs.Add('-');
+				else if(ch == '_') pcs.Add('_');
+				else if(ch == '\"') pcs.Add(pcs.SpecialChars);
+				else if(ch == '\\') pcs.Add(pcs.SpecialChars);
+				else if((@"()[]{}<>").IndexOf(ch) >= 0) pcs.Add(PwCharSet.Brackets);
+				else if((ch >= '~') && (ch <= 255)) pcs.Add(pcs.HighAnsiChars);
+				else pcs.Add(ch);
+			}
+
+			Array.Clear(vChars, 0, vChars.Length);
+			MemUtil.ZeroByteArray(pbUtf8);
+			return pp;
+		}
+
+		public bool HasSecurityReducingOption()
+		{
+			return (m_bNoLookAlike || m_bNoRepeat || (m_strExclude.Length > 0));
+		}
+	}
+}