kenneth.skovhede@gmail.com
b0a359fd27
git-svn-id: https://duplicati.googlecode.com/svn/trunk@770 59da171f-624f-0410-aa54-27559c288bec
93 lines
3.5 KiB
C#
93 lines
3.5 KiB
C#
#region Disclaimer / License
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// Copyright (C) 2011, Kenneth Skovhede
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// http://www.hexad.dk, opensource@hexad.dk
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Duplicati.Library.Utility
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{
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public static class KeyGenerator
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{
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public static readonly char[] ALPHA_LOWER = new char[] { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
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public static readonly char[] ALPHA_UPPER = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'K', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };
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public static readonly char[] DIGITS = new char[] { '0', '2', '3', '4', '5', '6', '7', '8', '9' };
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public static readonly char[] PUNCTUATION = new char[] { '.', ',', ':', ';', '!', '?' };
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public static readonly char[] MISC = new char[] { '*', '@', '#', '$', '%', '&', '/', '(', ')', '=', '+', '>', '<', '-', '_' };
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public static readonly char[] HEX_CHARS = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
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private static char[] _allowed = null;
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private static Random _rnd = null;
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public static char[] AllowedChars
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{
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get
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{
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if (_allowed == null)
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{
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List<char> l = new List<char>();
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l.AddRange(ALPHA_LOWER);
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l.AddRange(ALPHA_UPPER);
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l.AddRange(DIGITS);
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l.AddRange(PUNCTUATION);
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l.AddRange(MISC);
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_allowed = l.ToArray();
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}
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return _allowed;
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}
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}
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public static Random Rnd
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{
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get
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{
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if (_rnd == null)
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_rnd = new Random();
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return _rnd;
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}
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}
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public static string GenerateKey(int minChars, int maxChars)
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{
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char[] tmp = new char[Rnd.Next(minChars, maxChars + 1)];
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for (int i = 0; i < tmp.Length; i++)
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tmp[i] = AllowedChars[Rnd.Next(0, AllowedChars.Length)];
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return new string(tmp);
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}
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public static string GenerateSignKey()
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{
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byte[] tmp = new byte[4];
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Rnd.NextBytes(tmp);
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char[] res = new char[8];
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for (int i = 0; i < tmp.Length; i++)
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{
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res[i * 2] = HEX_CHARS[tmp[i] & 0xF];
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res[i * 2 + 1] = HEX_CHARS[(tmp[i] >> 4) & 0xF];
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}
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return new string(res);
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}
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}
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}
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