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1 <?php
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2
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3 /**
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4 +-------------------------------------------------------------------------+
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5 | Key class for the Enigma Plugin |
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6 | |
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7 | Copyright (C) 2010-2015 The Roundcube Dev Team |
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8 | |
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9 | Licensed under the GNU General Public License version 3 or |
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10 | any later version with exceptions for skins & plugins. |
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11 | See the README file for a full license statement. |
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12 | |
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13 +-------------------------------------------------------------------------+
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14 | Author: Aleksander Machniak <alec@alec.pl> |
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15 +-------------------------------------------------------------------------+
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16 */
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17
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18 class enigma_key
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19 {
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20 public $id;
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21 public $name;
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22 public $users = array();
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23 public $subkeys = array();
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24 public $reference;
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25 public $password;
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26
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27 const TYPE_UNKNOWN = 0;
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28 const TYPE_KEYPAIR = 1;
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29 const TYPE_PUBLIC = 2;
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30
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31 const CAN_ENCRYPT = 1;
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32 const CAN_SIGN = 2;
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33 const CAN_CERTIFY = 4;
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34 const CAN_AUTHENTICATE = 8;
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35
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36
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37 /**
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38 * Keys list sorting callback for usort()
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39 */
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40 static function cmp($a, $b)
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41 {
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42 return strcmp($a->name, $b->name);
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43 }
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44
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45 /**
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46 * Returns key type
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47 */
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48 function get_type()
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49 {
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50 if ($this->subkeys[0]->has_private)
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51 return enigma_key::TYPE_KEYPAIR;
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52 else if (!empty($this->subkeys[0]))
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53 return enigma_key::TYPE_PUBLIC;
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54
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55 return enigma_key::TYPE_UNKNOWN;
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56 }
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57
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58 /**
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59 * Returns true if all user IDs are revoked
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60 */
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61 function is_revoked()
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62 {
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63 foreach ($this->subkeys as $subkey)
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64 if (!$subkey->revoked)
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65 return false;
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66
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67 return true;
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68 }
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69
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70 /**
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71 * Returns true if any user ID is valid
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72 */
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73 function is_valid()
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74 {
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75 foreach ($this->users as $user)
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76 if ($user->valid)
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77 return true;
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78
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79 return false;
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80 }
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81
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82 /**
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83 * Returns true if any of subkeys is not expired
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84 */
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85 function is_expired()
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86 {
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87 $now = time();
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88
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89 foreach ($this->subkeys as $subkey)
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90 if (!$subkey->expires || $subkey->expires > $now)
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91 return true;
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92
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93 return false;
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94 }
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95
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96 /**
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97 * Returns true if any of subkeys is a private key
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98 */
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99 function is_private()
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100 {
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101 $now = time();
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102
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103 foreach ($this->subkeys as $subkey)
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104 if ($subkey->has_private)
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105 return true;
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106
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107 return false;
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108 }
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109
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110 /**
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111 * Get key ID by user email
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112 */
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113 function find_subkey($email, $mode)
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114 {
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115 $now = time();
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116
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117 foreach ($this->users as $user) {
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118 if (strcasecmp($user->email, $email) === 0 && $user->valid && !$user->revoked) {
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119 foreach ($this->subkeys as $subkey) {
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120 if (!$subkey->revoked && (!$subkey->expires || $subkey->expires > $now)) {
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121 if ($subkey->usage & $mode) {
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122 return $subkey;
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123 }
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124 }
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125 }
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126 }
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127 }
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128 }
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129
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130 /**
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131 * Converts long ID or Fingerprint to short ID
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132 * Crypt_GPG uses internal, but e.g. Thunderbird's Enigmail displays short ID
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133 *
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134 * @param string Key ID or fingerprint
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135 * @return string Key short ID
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136 */
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137 static function format_id($id)
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138 {
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139 // E.g. 04622F2089E037A5 => 89E037A5
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140
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141 return substr($id, -8);
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142 }
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143
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144 /**
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145 * Formats fingerprint string
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146 *
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147 * @param string Key fingerprint
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148 *
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149 * @return string Formatted fingerprint (with spaces)
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150 */
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151 static function format_fingerprint($fingerprint)
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152 {
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153 if (!$fingerprint) {
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154 return '';
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155 }
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156
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157 $result = '';
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158 for ($i=0; $i<40; $i++) {
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159 if ($i % 4 == 0) {
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160 $result .= ' ';
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161 }
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162 $result .= $fingerprint[$i];
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163 }
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164
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165 return $result;
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166 }
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167 }
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