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| 1 | +using System; |
| 2 | +using System.Collections.Generic; |
| 3 | +using System.IO; |
| 4 | +using System.Linq; |
| 5 | +using System.Security.Cryptography; |
| 6 | +using System.Text.RegularExpressions; |
| 7 | +using System.Threading.Tasks; |
| 8 | + |
| 9 | +namespace Advanced_PassGen.Classes |
| 10 | +{ |
| 11 | + /// <summary> |
| 12 | + /// A class to generate random strings. |
| 13 | + /// </summary> |
| 14 | + internal class PasswordGenerator |
| 15 | + { |
| 16 | + #region Variables |
| 17 | + |
| 18 | + private readonly int _minLength; |
| 19 | + private readonly int _maxLength; |
| 20 | + private readonly int _amount; |
| 21 | + private readonly int _seed; |
| 22 | + |
| 23 | + private readonly string _charSet; |
| 24 | + |
| 25 | + private List<Password> _passwordList; |
| 26 | + private static Random _rnd = new Random(); |
| 27 | + |
| 28 | + #endregion |
| 29 | + |
| 30 | + /// <summary> |
| 31 | + /// Initiate a new PasswordGenerator object. |
| 32 | + /// </summary> |
| 33 | + /// <param name="charSet">The character set that can be used to generate passwords with.</param> |
| 34 | + /// <param name="minLength">The minimum length of a password.</param> |
| 35 | + /// <param name="maxLength">The maximum length of a password.</param> |
| 36 | + /// <param name="amount">The amount of passwords that need to be generated.</param> |
| 37 | + /// <param name="seed">The seed for the random number generator.</param> |
| 38 | + internal PasswordGenerator(string charSet, int minLength, int maxLength, int amount, int seed) |
| 39 | + { |
| 40 | + _charSet = charSet; |
| 41 | + _minLength = minLength; |
| 42 | + _maxLength = maxLength; |
| 43 | + _amount = amount; |
| 44 | + _seed = seed; |
| 45 | + } |
| 46 | + |
| 47 | + /// <summary> |
| 48 | + /// Generate a list of passwords. |
| 49 | + /// </summary> |
| 50 | + /// <returns>A list of passwords.</returns> |
| 51 | + internal async Task<List<Password>> GeneratePasswords() |
| 52 | + { |
| 53 | + _passwordList = new List<Password>(); |
| 54 | + _rnd = new Random(_seed); |
| 55 | + await Task.Run(() => |
| 56 | + { |
| 57 | + for (int i = 0; i < _amount; i++) |
| 58 | + { |
| 59 | + var sub = _rnd.Next(_minLength, _maxLength); |
| 60 | + string pwd = GetRandomString(sub, _charSet); |
| 61 | + Password pass = new Password |
| 62 | + { |
| 63 | + ActualPassword = pwd, |
| 64 | + Length = pwd.Length, |
| 65 | + Strength = CheckStrength(pwd) |
| 66 | + }; |
| 67 | + _passwordList.Add(pass); |
| 68 | + } |
| 69 | + }); |
| 70 | + return _passwordList; |
| 71 | + } |
| 72 | + |
| 73 | + /// <summary> |
| 74 | + /// Generate a random string. |
| 75 | + /// </summary> |
| 76 | + /// <param name="length">The length of the string that needs to be generated.</param> |
| 77 | + /// <param name="characterSet">The characterset that the generator can use.</param> |
| 78 | + /// <returns></returns> |
| 79 | + private static string GetRandomString(int length, IEnumerable<char> characterSet) |
| 80 | + { |
| 81 | + char[] characterArray = characterSet.Distinct().ToArray(); |
| 82 | + byte[] bytes = new byte[length * 8]; |
| 83 | + new RNGCryptoServiceProvider().GetBytes(bytes); |
| 84 | + char[] result = new char[length]; |
| 85 | + for (int i = 0; i < length; i++) |
| 86 | + { |
| 87 | + ulong value = BitConverter.ToUInt64(bytes, i * 8); |
| 88 | + result[i] = characterArray[value % (uint)characterArray.Length]; |
| 89 | + } |
| 90 | + return new string(result); |
| 91 | + } |
| 92 | + |
| 93 | + /// <summary> |
| 94 | + /// Check how a strong a password is. The higher the score, the safer the password. |
| 95 | + /// </summary> |
| 96 | + /// <param name="password">The password that needs to be evaluated.</param> |
| 97 | + /// <returns>Returns a password score.</returns> |
| 98 | + internal static int CheckStrength(string password) |
| 99 | + { |
| 100 | + int score = 0; |
| 101 | + |
| 102 | + if (string.IsNullOrEmpty(password)) return 0; |
| 103 | + if (password.Length < 1) return 0; |
| 104 | + if (password.Length < 4) return 1; |
| 105 | + if (password.Length >= 8) score++; |
| 106 | + if (password.Length >= 10) score++; |
| 107 | + if (Regex.Match(password, @"\d", RegexOptions.ECMAScript).Success) score++; |
| 108 | + if (Regex.Match(password, @"[a-z]", RegexOptions.ECMAScript).Success && Regex.Match(password, @"[A-Z]", RegexOptions.ECMAScript).Success) score++; |
| 109 | + if (Regex.Match(password, @"[!,@,#,$,%,^,&,*,?,_,~,-,£,(,)]", RegexOptions.ECMAScript).Success) score++; |
| 110 | + |
| 111 | + return score; |
| 112 | + } |
| 113 | + |
| 114 | + /// <summary> |
| 115 | + /// Export a password list as a text file. |
| 116 | + /// </summary> |
| 117 | + /// <param name="path">The path where the text file should be stored.</param> |
| 118 | + internal void ExportText(string path) |
| 119 | + { |
| 120 | + if (_passwordList.Count < 1) return; |
| 121 | + string items = "Password List - Generated by Advanced PassGen" + Environment.NewLine; |
| 122 | + for (int i = 0; i < _passwordList.Count; i++) |
| 123 | + { |
| 124 | + Password pwd = _passwordList[i]; |
| 125 | + if (pwd == null) continue; |
| 126 | + items += pwd.ActualPassword; |
| 127 | + if (i != _passwordList.Count - 1) |
| 128 | + { |
| 129 | + items += Environment.NewLine; |
| 130 | + } |
| 131 | + } |
| 132 | + FileWriter(path, items); |
| 133 | + } |
| 134 | + |
| 135 | + /// <summary> |
| 136 | + /// Export a password list as a HTML file. |
| 137 | + /// </summary> |
| 138 | + /// <param name="path">The path where the HTML file should be stored.</param> |
| 139 | + internal void ExportHtml(string path) |
| 140 | + { |
| 141 | + if (_passwordList.Count < 1) return; |
| 142 | + string items = "<html><body><h1>Password List - Generated by Advanced PassGen</h1><br /><table><tr><th>Password</th>"; |
| 143 | + if (Properties.Settings.Default.ExportLength) |
| 144 | + { |
| 145 | + items += "<th>Length</th>"; |
| 146 | + } |
| 147 | + if (Properties.Settings.Default.ExportStrength) |
| 148 | + { |
| 149 | + items += "<th>Strength</th>"; |
| 150 | + } |
| 151 | + items += "</tr>"; |
| 152 | + |
| 153 | + foreach (Password pwd in _passwordList) |
| 154 | + { |
| 155 | + if (pwd == null) continue; |
| 156 | + items += "<tr><td>" + pwd.ActualPassword + "</td>"; |
| 157 | + if (Properties.Settings.Default.ExportLength) |
| 158 | + { |
| 159 | + items += "<td>" + pwd.Length + "</td>"; |
| 160 | + } |
| 161 | + if (Properties.Settings.Default.ExportStrength) |
| 162 | + { |
| 163 | + items += "<td>" + pwd.Strength + "</td>"; |
| 164 | + } |
| 165 | + items += "</tr>"; |
| 166 | + } |
| 167 | + items += "</table></body></html>"; |
| 168 | + FileWriter(path, items); |
| 169 | + } |
| 170 | + |
| 171 | + /// <summary> |
| 172 | + /// Export a password list as a CSV file. |
| 173 | + /// </summary> |
| 174 | + /// <param name="path">The path where the CSV file should be stored.</param> |
| 175 | + internal void ExportCsv(string path) |
| 176 | + { |
| 177 | + if (_passwordList.Count < 1) return; |
| 178 | + string items = "Password List - Generated by Advanced PassGen" + Environment.NewLine + "Password"; |
| 179 | + if (Properties.Settings.Default.ExportLength) |
| 180 | + { |
| 181 | + items += Properties.Settings.Default.ExportDelimiter + "Length"; |
| 182 | + } |
| 183 | + if (Properties.Settings.Default.ExportStrength) |
| 184 | + { |
| 185 | + items += Properties.Settings.Default.ExportDelimiter + "Strength"; |
| 186 | + } |
| 187 | + items += Environment.NewLine; |
| 188 | + for (int i = 0; i < _passwordList.Count; i++) |
| 189 | + { |
| 190 | + Password pwd = _passwordList[i]; |
| 191 | + if (pwd != null) |
| 192 | + { |
| 193 | + items += pwd.ActualPassword; |
| 194 | + if (Properties.Settings.Default.ExportLength) |
| 195 | + { |
| 196 | + items += Properties.Settings.Default.ExportDelimiter + pwd.Length; |
| 197 | + } |
| 198 | + if (Properties.Settings.Default.ExportStrength) |
| 199 | + { |
| 200 | + items += Properties.Settings.Default.ExportDelimiter + pwd.Strength; |
| 201 | + } |
| 202 | + } |
| 203 | + if (i != _passwordList.Count - 1) |
| 204 | + { |
| 205 | + items += Environment.NewLine; |
| 206 | + } |
| 207 | + } |
| 208 | + FileWriter(path, items); |
| 209 | + } |
| 210 | + |
| 211 | + /// <summary> |
| 212 | + /// Write a string to a file. |
| 213 | + /// </summary> |
| 214 | + /// <param name="path">The path where the string should be stored.</param> |
| 215 | + /// <param name="text">The text that should be written to the file.</param> |
| 216 | + private static void FileWriter(string path, string text) |
| 217 | + { |
| 218 | + using (StreamWriter sw = new StreamWriter(path)) |
| 219 | + { |
| 220 | + sw.Write(text); |
| 221 | + sw.Close(); |
| 222 | + } |
| 223 | + } |
| 224 | + } |
| 225 | +} |
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