1 | <?php |
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2 | /**************************************************************************\ |
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3 | * eGroupWare API - Password auth and crypt functions * |
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4 | * This file written by Miles Lott <milos@groupwhere.org> * |
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5 | * Copyright (C) 2004 Miles Lott * |
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6 | * Many functions based on code from Frank Thomas <frank@thomas-alfeld.de> * |
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7 | * which can be seen at http://www.thomas-alfeld.de/frank/ * |
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8 | * Other functions from class.common.inc.php originally from phpGroupWare * |
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9 | * ------------------------------------------------------------------------ * |
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10 | * This library is free software; you can redistribute it and/or modify it * |
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11 | * under the terms of the GNU Lesser General Public License as published by * |
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12 | * the Free Software Foundation; either version 2.1 of the License, * |
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13 | * or any later version. * |
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14 | * This library is distributed in the hope that it will be useful, but * |
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15 | * WITHOUT ANY WARRANTY; without even the implied warranty of * |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * |
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17 | * See the GNU Lesser General Public License for more details. * |
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18 | * You should have received a copy of the GNU Lesser General Public License * |
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19 | * along with this library; if not, write to the Free Software Foundation, * |
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20 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * |
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21 | \**************************************************************************/ |
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22 | |
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23 | |
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24 | if(empty($GLOBALS['phpgw_info']['server']['auth_type'])) |
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25 | { |
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26 | $GLOBALS['phpgw_info']['server']['auth_type'] = 'sql'; |
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27 | } |
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28 | include(PHPGW_API_INC.'/class.auth_'.$GLOBALS['phpgw_info']['server']['auth_type'].'.inc.php'); |
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29 | |
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30 | class auth extends auth_ |
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31 | { |
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32 | var $seeded = False; |
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33 | var $error = ''; |
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34 | |
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35 | /*! |
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36 | @function randomstring |
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37 | @abstract return a random string of size $size |
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38 | @param $size int-size of random string to return |
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39 | */ |
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40 | function randomstring($size) |
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41 | { |
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42 | $s = ''; |
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43 | $random_char = array( |
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44 | '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f', |
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45 | 'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v', |
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46 | 'w','x','y','z','A','B','C','D','E','F','G','H','I','J','K','L', |
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47 | 'M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z' |
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48 | ); |
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49 | |
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50 | if(!$this->seeded && phpversion() < '4.2.0') |
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51 | { |
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52 | list($usec, $sec) = explode(' ', microtime()); |
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53 | mt_srand((float)$sec + ((float)$usec * 100000)); |
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54 | $this->seeded = True; |
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55 | } |
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56 | |
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57 | for ($i=0; $i<$size; ++$i) |
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58 | { |
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59 | $s .= $random_char[mt_rand(1,61)]; |
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60 | } |
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61 | return $s; |
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62 | } |
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63 | |
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64 | /*! |
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65 | @function encrypt_password |
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66 | @abstract encrypt password |
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67 | @abstract uses the encryption type set in setup and calls the appropriate encryption functions |
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68 | @param $password password to encrypt |
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69 | */ |
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70 | function encrypt_password($password,$sql=False) |
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71 | { |
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72 | if($sql) |
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73 | { |
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74 | return $this->encrypt_sql($password); |
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75 | } |
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76 | return $this->encrypt_ldap($password); |
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77 | } |
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78 | |
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79 | /*! |
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80 | @function encrypt_ldap |
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81 | @abstract encrypt password for ldap |
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82 | @abstract uses the encryption type set in setup and calls the appropriate encryption functions |
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83 | @param $password password to encrypt |
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84 | */ |
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85 | function encrypt_ldap($password) |
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86 | { |
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87 | $type = strtolower($GLOBALS['phpgw_info']['server']['ldap_encryption_type']); |
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88 | $salt = ''; |
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89 | switch($type) |
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90 | { |
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91 | case 'des': |
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92 | $salt = $this->randomstring(2); |
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93 | $_password = crypt($password, $salt); |
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94 | $e_password = sprintf('%s%s', '{crypt}', $_password); |
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95 | break; |
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96 | case 'md5': |
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97 | /* New method taken from the openldap-software list as recommended by |
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98 | * Kervin L. Pierre" <kervin@blueprint-tech.com> |
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99 | */ |
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100 | $e_password = '{md5}' . base64_encode(pack("H*",md5($password))); |
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101 | break; |
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102 | case 'smd5': |
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103 | if(!function_exists('mhash')) |
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104 | { |
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105 | return False; |
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106 | } |
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107 | $salt = $this->randomstring(8); |
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108 | $hash = mhash(MHASH_MD5, $password . $salt); |
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109 | $e_password = '{SMD5}' . base64_encode($hash . $salt); |
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110 | break; |
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111 | case 'sha': |
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112 | if(!function_exists('mhash')) |
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113 | { |
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114 | return False; |
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115 | } |
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116 | $e_password = '{SHA}' . base64_encode(mhash(MHASH_SHA1, $password)); |
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117 | break; |
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118 | case 'ssha': |
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119 | if(!function_exists('mhash')) |
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120 | { |
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121 | return False; |
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122 | } |
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123 | $salt = $this->randomstring(8); |
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124 | $hash = mhash(MHASH_SHA1, $password . $salt); |
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125 | $e_password = '{SSHA}' . base64_encode($hash . $salt); |
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126 | break; |
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127 | default: |
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128 | return False; |
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129 | } |
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130 | return $e_password; |
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131 | } |
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132 | |
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133 | /* Create a password for storage in the phpgw_accounts table */ |
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134 | function encrypt_sql($password) |
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135 | { |
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136 | /* Grab configured type, or default to md5() (old method) */ |
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137 | $type = @$GLOBALS['phpgw_info']['server']['sql_encryption_type'] |
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138 | ? strtolower($GLOBALS['phpgw_info']['server']['sql_encryption_type']) |
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139 | : 'md5'; |
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140 | switch($type) |
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141 | { |
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142 | case 'crypt': |
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143 | if(@defined('CRYPT_STD_DES') && CRYPT_STD_DES == 1) |
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144 | { |
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145 | $salt = $this->randomstring(2); |
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146 | return crypt($password,$salt); |
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147 | } |
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148 | $this->error = 'no std crypt'; |
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149 | break; |
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150 | case 'blowfish_crypt': |
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151 | if(@defined('CRYPT_BLOWFISH') && CRYPT_BLOWFISH == 1) |
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152 | { |
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153 | $salt = '$2$' . $this->randomstring(13); |
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154 | return crypt($password,$salt); |
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155 | } |
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156 | $this->error = 'no blowfish crypt'; |
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157 | break; |
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158 | case 'md5_crypt': |
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159 | if(@defined('CRYPT_MD5') && CRYPT_MD5 == 1) |
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160 | { |
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161 | $salt = '$1$' . $this->randomstring(9); |
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162 | return crypt($password,$salt); |
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163 | } |
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164 | $this->error = 'no md5 crypt'; |
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165 | break; |
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166 | case 'ext_crypt': |
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167 | if(@defined('CRYPT_EXT_DES') && CRYPT_EXT_DES == 1) |
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168 | { |
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169 | $salt = $this->randomstring(9); |
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170 | return crypt($password,$salt); |
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171 | } |
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172 | $this->error = 'no ext crypt'; |
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173 | break; |
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174 | case 'smd5': |
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175 | if(!function_exists('mhash')) |
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176 | { |
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177 | return False; |
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178 | } |
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179 | $salt = $this->randomstring(8); |
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180 | $hash = mhash(MHASH_MD5, $password . $salt); |
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181 | return '{SMD5}' . base64_encode($hash . $salt); |
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182 | case 'sha': |
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183 | if(!function_exists('mhash')) |
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184 | { |
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185 | $this->error = 'no sha'; |
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186 | return False; |
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187 | } |
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188 | return '{SHA}' . base64_encode(mhash(MHASH_SHA1,$password)); |
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189 | case 'ssha': |
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190 | if(!function_exists('mhash')) |
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191 | { |
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192 | $this->error = 'no ssha'; |
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193 | return False; |
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194 | } |
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195 | $salt = $this->randomstring(8); |
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196 | $hash = mhash(MHASH_SHA1, $password . $salt); |
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197 | return '{SSHA}' . base64_encode($hash . $salt); |
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198 | case 'md5': |
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199 | default: |
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200 | /* This is the old standard for password storage in SQL */ |
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201 | return md5($password); |
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202 | } |
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203 | $this->error = $this->error ? $this->error : 'no valid encryption available'; |
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204 | return False; |
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205 | } |
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206 | |
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207 | /** |
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208 | @function smd5_compare |
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209 | @abstract compare SMD5-encrypted passwords for authentication |
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210 | @param $form_val user input value for comparison |
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211 | @param $db_val stored value (from database) |
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212 | @return boolean True on successful comparison |
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213 | */ |
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214 | function smd5_compare($form_val,$db_val) |
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215 | { |
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216 | /* Start with the first char after {SMD5} */ |
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217 | $hash = base64_decode(substr($db_val,6)); |
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218 | |
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219 | /* SMD5 hashes are 16 bytes long */ |
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220 | $orig_hash = substr($hash, 0, 16); |
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221 | $salt = substr($hash, 16); |
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222 | |
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223 | $new_hash = mhash(MHASH_MD5,$form_val . $salt); |
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224 | //echo '<br> DB: ' . base64_encode($orig_hash) . '<br>FORM: ' . base64_encode($new_hash); |
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225 | |
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226 | if(strcmp($orig_hash,$new_hash) == 0) |
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227 | { |
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228 | return True; |
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229 | } |
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230 | return False; |
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231 | } |
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232 | |
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233 | /** |
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234 | @function sha_compare |
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235 | @abstract compare SHA-encrypted passwords for authentication |
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236 | @param $form_val user input value for comparison |
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237 | @param $db_val stored value (from database) |
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238 | @return boolean True on successful comparison |
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239 | */ |
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240 | function sha_compare($form_val,$db_val) |
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241 | { |
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242 | /* Start with the first char after {SHA} */ |
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243 | $hash = base64_decode(substr($db_val,5)); |
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244 | $new_hash = mhash(MHASH_SHA1,$form_val); |
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245 | //echo '<br> DB: ' . base64_encode($orig_hash) . '<br>FORM: ' . base64_encode($new_hash); |
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246 | |
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247 | if(strcmp($hash,$new_hash) == 0) |
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248 | { |
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249 | return True; |
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250 | } |
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251 | return False; |
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252 | } |
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253 | |
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254 | /** |
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255 | @function ssha_compare |
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256 | @abstract compare SSHA-encrypted passwords for authentication |
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257 | @param $form_val user input value for comparison |
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258 | @param $db_val stored value (from database) |
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259 | @return boolean True on successful comparison |
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260 | */ |
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261 | function ssha_compare($form_val,$db_val) |
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262 | { |
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263 | /* Start with the first char after {SSHA} */ |
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264 | $hash = base64_decode(substr($db_val, 6)); |
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265 | |
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266 | // SHA-1 hashes are 160 bits long |
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267 | $orig_hash = substr($hash, 0, 20); |
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268 | $salt = substr($hash, 20); |
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269 | $new_hash = mhash(MHASH_SHA1, $form_val . $salt); |
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270 | |
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271 | if(strcmp($orig_hash,$new_hash) == 0) |
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272 | { |
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273 | return True; |
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274 | } |
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275 | return False; |
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276 | } |
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277 | |
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278 | /** |
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279 | @function crypt_compare |
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280 | @abstract compare crypted passwords for authentication whether des,ext_des,md5, or blowfish crypt |
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281 | @param $form_val user input value for comparison |
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282 | @param $db_val stored value (from database) |
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283 | @param $type crypt() type |
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284 | @return boolean True on successful comparison |
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285 | */ |
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286 | function crypt_compare($form_val,$db_val,$type) |
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287 | { |
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288 | $saltlen = array( |
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289 | 'blowfish_crypt' => 16, |
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290 | 'md5_crypt' => 12, |
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291 | 'ext_crypt' => 9, |
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292 | 'crypt' => 2 |
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293 | ); |
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294 | |
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295 | // PHP's crypt(): salt + hash |
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296 | // notice: "The encryption type is triggered by the salt argument." |
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297 | $salt = substr($db_val, 0, (int)$saltlen[$type]); |
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298 | $new_hash = crypt($form_val, $salt); |
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299 | |
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300 | if(strcmp($db_val,$new_hash) == 0) |
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301 | { |
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302 | return True; |
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303 | } |
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304 | return False; |
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305 | } |
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306 | } |
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307 | ?> |
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