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58 | daniel-mar | 1 | <?php |
2 | |||
3 | /* |
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70 | daniel-mar | 4 | * ViaThinkSoft Modular Crypt Format 1.0 and vts_password_*() functions |
58 | daniel-mar | 5 | * Copyright 2023 Daniel Marschall, ViaThinkSoft |
72 | daniel-mar | 6 | * Revision 2023-03-03 |
58 | daniel-mar | 7 | * |
8 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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9 | * you may not use this file except in compliance with the License. |
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10 | * You may obtain a copy of the License at |
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11 | * |
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12 | * http://www.apache.org/licenses/LICENSE-2.0 |
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13 | * |
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14 | * Unless required by applicable law or agreed to in writing, software |
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15 | * distributed under the License is distributed on an "AS IS" BASIS, |
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16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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17 | * See the License for the specific language governing permissions and |
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18 | * limitations under the License. |
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19 | */ |
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20 | |||
21 | /* |
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22 | |||
63 | daniel-mar | 23 | The function vts_password_hash() replaces password_hash() |
24 | and adds the ViaThinkSoft Modular Crypt Format 1.0 hash as well as |
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25 | all hashes from password_hash() and crypt(). |
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26 | |||
27 | The function vts_password_verify() replaces password_verify(). |
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28 | |||
58 | daniel-mar | 29 | ViaThinkSoft Modular Crypt Format 1.0 performs a simple hash or HMAC operation. |
30 | No key derivation function or iterations are performed. |
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31 | Format: |
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74 | daniel-mar | 32 | $1.3.6.1.4.1.37476.3.0.1.1$a=<algo>,m=<mode>[,i=<iterations>]$<salt>$<hash> |
58 | daniel-mar | 33 | where <algo> is any valid hash algorithm (name scheme of PHP hash_algos() preferred), e.g. |
34 | sha3-512 |
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35 | sha3-384 |
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36 | sha3-256 |
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37 | sha3-224 |
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38 | sha512 |
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39 | sha512/256 |
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40 | sha512/224 |
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41 | sha384 |
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42 | sha256 |
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43 | sha224 |
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44 | sha1 |
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45 | md5 |
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70 | daniel-mar | 46 | Not supported are these hashes (because they have a special salt-handling and output their own crypt format): |
47 | bcrypt [Standardized crypt identifier 2, 2a, 2x, 2y] |
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48 | argon2i [Crypt identifier argon2i, not standardized] |
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49 | argon2id [Crypt identifier argon2i, not standardized] |
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58 | daniel-mar | 50 | Valid <mode> : |
51 | sp = salt + password |
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52 | ps = password + salt |
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53 | sps = salt + password + salt |
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54 | hmac = HMAC (salt is the key) |
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68 | daniel-mar | 55 | pbkdf2 = PBKDF2-HMAC (Additional param i= contains the number of iterations) |
74 | daniel-mar | 56 | <iterations> can be omitted if 0. It is required for mode=pbkdf2. For sp/ps/sps/hmac, it is optional. |
60 | daniel-mar | 57 | Like most Crypt-hashes, <salt> and <hash> are Radix64 coded |
58 | with alphabet './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' and no padding. |
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58 | daniel-mar | 59 | Link to the online specification: |
60 | https://oidplus.viathinksoft.com/oidplus/?goto=oid%3A1.3.6.1.4.1.37476.3.0.1.1 |
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61 | Reference implementation in PHP: |
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62 | https://github.com/danielmarschall/php_utils/blob/master/vts_crypt.inc.php |
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63 | |||
64 | */ |
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65 | |||
63 | daniel-mar | 66 | require_once __DIR__ . '/misc_functions.inc.php'; |
58 | daniel-mar | 67 | |
64 | daniel-mar | 68 | define('OID_MCF_VTS_V1', '1.3.6.1.4.1.37476.3.0.1.1'); // { iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 37476 specifications(3) misc(0) modular-crypt-format(1) vts-crypt-v1(1) } |
63 | daniel-mar | 69 | |
64 | daniel-mar | 70 | // Valid algorithms for vts_password_hash(): |
70 | daniel-mar | 71 | define('PASSWORD_STD_DES', 'std-des'); // Algorithm from crypt() |
72 | define('PASSWORD_EXT_DES', 'ext-des'); // Algorithm from crypt() |
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64 | daniel-mar | 73 | define('PASSWORD_MD5', 'md5'); // Algorithm from crypt() |
74 | define('PASSWORD_BLOWFISH', 'blowfish'); // Algorithm from crypt() |
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75 | define('PASSWORD_SHA256', 'sha256'); // Algorithm from crypt() |
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76 | define('PASSWORD_SHA512', 'sha512'); // Algorithm from crypt() |
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70 | daniel-mar | 77 | define('PASSWORD_VTS_MCF1', OID_MCF_VTS_V1); // Algorithm by ViaThinkSoft |
64 | daniel-mar | 78 | // Other valid values (already defined in PHP): |
79 | // - PASSWORD_DEFAULT |
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80 | // - PASSWORD_BCRYPT |
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81 | // - PASSWORD_ARGON2I |
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82 | // - PASSWORD_ARGON2ID |
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63 | daniel-mar | 83 | |
70 | daniel-mar | 84 | define('PASSWORD_VTS_MCF1_MODE_SP', 'sp'); // Salt+Password |
85 | define('PASSWORD_VTS_MCF1_MODE_PS', 'ps'); // Password+Salt |
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86 | define('PASSWORD_VTS_MCF1_MODE_SPS', 'sps'); // Salt+Password+Salt |
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87 | define('PASSWORD_VTS_MCF1_MODE_HMAC', 'hmac'); // HMAC |
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88 | define('PASSWORD_VTS_MCF1_MODE_PBKDF2', 'pbkdf2'); // PBKDF2-HMAC |
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89 | |||
90 | define('PASSWORD_EXT_DES_DEFAULT_ITERATIONS', 725); |
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91 | define('PASSWORD_BLOWFISH_DEFAULT_COST', 10); |
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92 | define('PASSWORD_SHA256_DEFAULT_ROUNDS', 5000); |
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93 | define('PASSWORD_SHA512_DEFAULT_ROUNDS', 5000); |
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94 | define('PASSWORD_VTS_MCF1_DEFAULT_ALGO', 'sha3-512'); // any value in hash_algos(), NOT vts_hash_algos() |
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95 | define('PASSWORD_VTS_MCF1_DEFAULT_MODE', PASSWORD_VTS_MCF1_MODE_PS); |
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74 | daniel-mar | 96 | define('PASSWORD_VTS_MCF1_DEFAULT_ITERATIONS', 0); // For PBKDF2, iterations=0 means: Default, depending on the algo |
70 | daniel-mar | 97 | |
63 | daniel-mar | 98 | // --- Part 1: Modular Crypt Format encode/decode |
58 | daniel-mar | 99 | |
64 | daniel-mar | 100 | function crypt_modular_format_encode($id, $bin_salt, $bin_hash, $params=null) { |
58 | daniel-mar | 101 | // $<id>[$<param>=<value>(,<param>=<value>)*][$<salt>[$<hash>]] |
102 | $out = '$'.$id; |
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103 | if (!is_null($params)) { |
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104 | $ary_params = array(); |
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105 | foreach ($params as $name => $value) { |
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106 | $ary_params[] = "$name=$value"; |
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107 | } |
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108 | $out .= '$'.implode(',',$ary_params); |
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109 | } |
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59 | daniel-mar | 110 | $out .= '$'.crypt_radix64_encode($bin_salt); |
111 | $out .= '$'.crypt_radix64_encode($bin_hash); |
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58 | daniel-mar | 112 | return $out; |
113 | } |
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114 | |||
59 | daniel-mar | 115 | function crypt_modular_format_decode($mcf) { |
116 | $ary = explode('$', $mcf); |
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117 | |||
118 | $dummy = array_shift($ary); |
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119 | if ($dummy !== '') return false; |
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120 | |||
121 | $dummy = array_shift($ary); |
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122 | $id = $dummy; |
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123 | |||
124 | $params = array(); |
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125 | $dummy = array_shift($ary); |
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126 | if (strpos($dummy, '=') !== false) { |
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127 | $params_ary = explode(',',$dummy); |
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128 | foreach ($params_ary as $param) { |
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129 | $bry = explode('=', $param, 2); |
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130 | if (count($bry) > 1) { |
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131 | $params[$bry[0]] = $bry[1]; |
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132 | } |
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133 | } |
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134 | } else { |
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135 | array_unshift($ary, $dummy); |
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136 | } |
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137 | |||
138 | if (count($ary) > 1) { |
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139 | $dummy = array_shift($ary); |
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140 | $bin_salt = crypt_radix64_decode($dummy); |
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141 | } else { |
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142 | $bin_salt = ''; |
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143 | } |
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144 | |||
145 | $dummy = array_shift($ary); |
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146 | $bin_hash = crypt_radix64_decode($dummy); |
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147 | |||
72 | daniel-mar | 148 | return array('id' => $id, |
149 | 'salt' => $bin_salt, |
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150 | 'hash' => $bin_hash, |
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151 | 'params' => $params); |
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59 | daniel-mar | 152 | } |
153 | |||
63 | daniel-mar | 154 | // --- Part 2: ViaThinkSoft Modular Crypt Format 1.0 |
155 | |||
64 | daniel-mar | 156 | function vts_crypt_version($hash) { |
157 | if (str_starts_with($hash, '$'.OID_MCF_VTS_V1.'$')) { |
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158 | return '1'; |
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159 | } else { |
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160 | return '0'; |
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161 | } |
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162 | } |
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163 | |||
70 | daniel-mar | 164 | function vts_crypt_hash($algo, $str_password, $str_salt, $ver='1', $mode=PASSWORD_VTS_MCF1_DEFAULT_MODE, $iterations=PASSWORD_VTS_MCF1_DEFAULT_ITERATIONS) { |
58 | daniel-mar | 165 | if ($ver == '1') { |
70 | daniel-mar | 166 | if ($mode == PASSWORD_VTS_MCF1_MODE_SP) { |
74 | daniel-mar | 167 | $bin_hash = hash_ex($algo, $str_salt.$str_password, true); |
168 | for ($i=0; $i<$iterations; $i++) { |
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169 | $bin_hash = hash_ex($algo, $str_salt.$bin_hash.$i, true); |
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170 | } |
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70 | daniel-mar | 171 | } else if ($mode == PASSWORD_VTS_MCF1_MODE_PS) { |
74 | daniel-mar | 172 | $bin_hash = hash_ex($algo, $str_password.$str_salt, true); |
173 | for ($i=0; $i<$iterations; $i++) { |
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174 | $bin_hash = hash_ex($algo, $bin_hash.$i.$str_salt, true); |
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175 | } |
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70 | daniel-mar | 176 | } else if ($mode == PASSWORD_VTS_MCF1_MODE_SPS) { |
74 | daniel-mar | 177 | $bin_hash = hash_ex($algo, $str_salt.$str_password.$str_salt, true); |
178 | for ($i=0; $i<$iterations; $i++) { |
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179 | $bin_hash = hash_ex($algo, $str_salt.$bin_hash.$i.$str_salt, true); |
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180 | } |
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70 | daniel-mar | 181 | } else if ($mode == PASSWORD_VTS_MCF1_MODE_HMAC) { |
72 | daniel-mar | 182 | $bin_hash = hash_hmac_ex($algo, $str_password, $str_salt, true); |
74 | daniel-mar | 183 | for ($i=0; $i<$iterations; $i++) { |
184 | // https://security.stackexchange.com/questions/149299/rounds-in-a-hashing-function |
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185 | $bin_hash = hash_hmac_ex($algo, $str_password, $bin_hash.$i, true); |
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186 | } |
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70 | daniel-mar | 187 | } else if ($mode == PASSWORD_VTS_MCF1_MODE_PBKDF2) { |
72 | daniel-mar | 188 | $bin_hash = hash_pbkdf2_ex($algo, $str_password, $str_salt, $iterations, 0, true); |
58 | daniel-mar | 189 | } else { |
65 | daniel-mar | 190 | throw new Exception("Invalid VTS crypt version 1 mode. Expect sp, ps, sps, hmac, or pbkdf2."); |
58 | daniel-mar | 191 | } |
192 | $bin_salt = $str_salt; |
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65 | daniel-mar | 193 | $params = array(); |
194 | $params['a'] = $algo; |
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195 | $params['m'] = $mode; |
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74 | daniel-mar | 196 | if ($iterations != 0) $params['i'] = $iterations; // i can be omitted if it is 0. |
65 | daniel-mar | 197 | return crypt_modular_format_encode(OID_MCF_VTS_V1, $bin_salt, $bin_hash, $params); |
58 | daniel-mar | 198 | } else { |
59 | daniel-mar | 199 | throw new Exception("Invalid VTS crypt version, expect 1."); |
58 | daniel-mar | 200 | } |
201 | } |
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63 | daniel-mar | 202 | |
64 | daniel-mar | 203 | function vts_crypt_verify($password, $hash): bool { |
204 | $ver = vts_crypt_version($hash); |
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205 | if ($ver == '1') { |
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63 | daniel-mar | 206 | // Decode the MCF hash parameters |
207 | $data = crypt_modular_format_decode($hash); |
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208 | if ($data === false) throw new Exception('Invalid auth key'); |
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209 | $id = $data['id']; |
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210 | $bin_salt = $data['salt']; |
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211 | $bin_hash = $data['hash']; |
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212 | $params = $data['params']; |
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65 | daniel-mar | 213 | |
214 | if (!isset($params['a'])) throw new Exception('Param "a" (algo) missing'); |
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63 | daniel-mar | 215 | $algo = $params['a']; |
65 | daniel-mar | 216 | |
217 | if (!isset($params['m'])) throw new Exception('Param "m" (mode) missing'); |
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63 | daniel-mar | 218 | $mode = $params['m']; |
219 | |||
70 | daniel-mar | 220 | if ($mode == PASSWORD_VTS_MCF1_MODE_PBKDF2) { |
66 | daniel-mar | 221 | if (!isset($params['i'])) throw new Exception('Param "i" (iterations) missing'); |
222 | $iterations = $params['i']; |
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223 | } else { |
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74 | daniel-mar | 224 | $iterations = isset($params['i']) ? $params['i'] : 0; |
66 | daniel-mar | 225 | } |
65 | daniel-mar | 226 | |
63 | daniel-mar | 227 | // Create a VTS MCF 1.0 hash based on the parameters of $hash and the password $password |
65 | daniel-mar | 228 | $calc_authkey_1 = vts_crypt_hash($algo, $password, $bin_salt, $ver, $mode, $iterations); |
63 | daniel-mar | 229 | |
64 | daniel-mar | 230 | // We rewrite the MCF to make sure that they match (if params have the wrong order) |
231 | $calc_authkey_2 = crypt_modular_format_encode($id, $bin_salt, $bin_hash, $params); |
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63 | daniel-mar | 232 | |
233 | return hash_equals($calc_authkey_1, $calc_authkey_2); |
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64 | daniel-mar | 234 | } else { |
235 | throw new Exception("Invalid VTS crypt version, expect 1."); |
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236 | } |
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237 | } |
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63 | daniel-mar | 238 | |
70 | daniel-mar | 239 | // --- Part 3: Replacement of vts_password_*() functions |
64 | daniel-mar | 240 | |
70 | daniel-mar | 241 | /** |
242 | * This function replaces password_algos() by extending it with |
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243 | * password hashes that are implemented in vts_password_hash(). |
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244 | * @return array of hashes that can be used in vts_password_hash(). |
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64 | daniel-mar | 245 | */ |
70 | daniel-mar | 246 | function vts_password_algos() { |
247 | $hashes = password_algos(); |
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248 | $hashes[] = PASSWORD_STD_DES; // Algorithm from crypt() |
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249 | $hashes[] = PASSWORD_EXT_DES; // Algorithm from crypt() |
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250 | $hashes[] = PASSWORD_MD5; // Algorithm from crypt() |
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251 | $hashes[] = PASSWORD_BLOWFISH; // Algorithm from crypt() |
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252 | $hashes[] = PASSWORD_SHA256; // Algorithm from crypt() |
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253 | $hashes[] = PASSWORD_SHA512; // Algorithm from crypt() |
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254 | $hashes[] = PASSWORD_VTS_MCF1; // Algorithm by ViaThinkSoft |
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255 | return $hashes; |
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256 | } |
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257 | |||
258 | /** vts_password_get_info() is the same as password_get_info(), |
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259 | * but it adds the crypt() and ViaThinkSoft MCF 1.0 algos which can be |
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260 | * produced by vts_password_hash() |
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261 | * @param string $hash Hash created by vts_password_hash(), password_hash(), or crypt(). |
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262 | * @return array Same output like password_get_info(). |
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263 | */ |
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264 | function vts_password_get_info($hash) { |
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265 | if (vts_crypt_version($hash) == '1') { |
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266 | // OID_MCF_VTS_V1 |
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267 | $mcf = crypt_modular_format_decode($hash); |
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268 | |||
269 | //$options['salt_length'] = strlen($mcf['salt']); // Note: salt_length is not a MCF option! It's just a hint for vts_password_hash() |
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270 | |||
271 | if (!isset($mcf['params']['a'])) throw new Exception('Param "a" (algo) missing'); |
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272 | $options['algo'] = $mcf['params']['a']; |
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273 | |||
274 | if (!isset($mcf['params']['m'])) throw new Exception('Param "m" (mode) missing'); |
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275 | $options['mode'] = $mcf['params']['m']; |
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276 | |||
277 | if ($options['mode'] == PASSWORD_VTS_MCF1_MODE_PBKDF2) { |
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278 | if (!isset($mcf['params']['i'])) throw new Exception('Param "i" (iterations) missing'); |
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71 | daniel-mar | 279 | $options['iterations'] = (int)$mcf['params']['i']; |
74 | daniel-mar | 280 | } else { |
281 | $options['iterations'] = isset($mcf['params']['i']) ? (int)$mcf['params']['i'] : 0; |
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70 | daniel-mar | 282 | } |
283 | |||
284 | return array( |
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285 | "algo" => PASSWORD_VTS_MCF1, |
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286 | "algoName" => "vts-mcf-v1", |
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287 | "options" => $options |
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288 | ); |
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289 | } else if (!str_starts_with($hash, '$') && (strlen($hash) == 13)) { |
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290 | // PASSWORD_STD_DES |
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291 | return array( |
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292 | "algo" => PASSWORD_STD_DES, |
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293 | "algoName" => "std-des", |
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294 | "options" => array( |
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295 | // None |
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296 | ) |
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297 | ); |
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298 | } else if (str_starts_with($hash, '_') && (strlen($hash) == 20)) { |
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299 | // PASSWORD_EXT_DES |
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300 | return array( |
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301 | "algo" => PASSWORD_EXT_DES, |
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302 | "algoName" => "ext-des", |
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303 | "options" => array( |
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71 | daniel-mar | 304 | "iterations" => (int)base64_int_decode(substr($hash,1,4)) |
70 | daniel-mar | 305 | ) |
306 | ); |
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307 | } else if (str_starts_with($hash, '$1$')) { |
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308 | // PASSWORD_MD5 |
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309 | return array( |
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310 | "algo" => PASSWORD_MD5, |
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311 | "algoName" => "md5", |
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312 | "options" => array( |
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313 | // None |
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314 | ) |
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315 | ); |
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316 | } else if (str_starts_with($hash, '$2$') || str_starts_with($hash, '$2a$') || |
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317 | str_starts_with($hash, '$2x$') || str_starts_with($hash, '$2y$')) { |
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318 | // PASSWORD_BLOWFISH |
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319 | return array( |
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320 | "algo" => PASSWORD_BLOWFISH, |
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321 | "algoName" => "blowfish", |
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322 | "options" => array( |
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71 | daniel-mar | 323 | "cost" => (int)ltrim(explode('$',$hash)[2],'0') |
70 | daniel-mar | 324 | ) |
325 | ); |
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326 | } else if (str_starts_with($hash, '$5$')) { |
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327 | // PASSWORD_SHA256 |
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328 | return array( |
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329 | "algo" => PASSWORD_SHA256, |
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330 | "algoName" => "sha256", |
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331 | "options" => array( |
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71 | daniel-mar | 332 | 'rounds' => (int)str_replace('rounds=','',explode('$',$hash)[2]) |
70 | daniel-mar | 333 | ) |
334 | ); |
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335 | } else if (str_starts_with($hash, '$6$')) { |
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336 | // PASSWORD_SHA512 |
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337 | return array( |
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338 | "algo" => PASSWORD_SHA512, |
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339 | "algoName" => "sha512", |
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340 | "options" => array( |
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71 | daniel-mar | 341 | 'rounds' => (int)str_replace('rounds=','',explode('$',$hash)[2]) |
70 | daniel-mar | 342 | ) |
343 | ); |
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63 | daniel-mar | 344 | } else { |
70 | daniel-mar | 345 | // PASSWORD_DEFAULT |
346 | // PASSWORD_BCRYPT |
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347 | // PASSWORD_ARGON2I |
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348 | // PASSWORD_ARGON2ID |
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349 | return password_get_info($hash); |
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63 | daniel-mar | 350 | } |
351 | } |
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352 | |||
353 | /** This function extends password_hash() with the algorithms supported by crypt(). |
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64 | daniel-mar | 354 | * It also adds vts_crypt_hash() which implements the ViaThinkSoft Modular Crypt Format 1.0. |
63 | daniel-mar | 355 | * The result can be verified using vts_password_verify(). |
356 | * @param string $password to be hashed |
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357 | * @param mixed $algo algorithm |
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358 | * @param array $options options for the hashing algorithm |
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64 | daniel-mar | 359 | * @return string Crypt style password hash |
63 | daniel-mar | 360 | */ |
361 | function vts_password_hash($password, $algo, $options=array()): string { |
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70 | daniel-mar | 362 | $options = vts_password_fill_default_options($algo, $options); |
363 | |||
63 | daniel-mar | 364 | $crypt_salt = null; |
365 | if (($algo === PASSWORD_STD_DES) && defined('CRYPT_STD_DES')) { |
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366 | // Standard DES-based hash with a two character salt from the alphabet "./0-9A-Za-z". Using invalid characters in the salt will cause crypt() to fail. |
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367 | $crypt_salt = des_compat_salt(2); |
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368 | } else if (($algo === PASSWORD_EXT_DES) && defined('CRYPT_EXT_DES')) { |
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369 | // Extended DES-based hash. The "salt" is a 9-character string consisting of an underscore followed by 4 characters of iteration count and 4 characters of salt. Each of these 4-character strings encode 24 bits, least significant character first. The values 0 to 63 are encoded as ./0-9A-Za-z. Using invalid characters in the salt will cause crypt() to fail. |
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70 | daniel-mar | 370 | $iterations = $options['iterations']; |
371 | $crypt_salt = '_' . base64_int_encode($iterations,4) . des_compat_salt(4); |
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63 | daniel-mar | 372 | } else if (($algo === PASSWORD_MD5) && defined('CRYPT_MD5')) { |
373 | // MD5 hashing with a twelve character salt starting with $1$ |
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374 | $crypt_salt = '$1$'.des_compat_salt(12).'$'; |
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375 | } else if (($algo === PASSWORD_BLOWFISH) && defined('CRYPT_BLOWFISH')) { |
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376 | // Blowfish hashing with a salt as follows: "$2a$", "$2x$" or "$2y$", a two digit cost parameter, "$", and 22 characters from the alphabet "./0-9A-Za-z". Using characters outside of this range in the salt will cause crypt() to return a zero-length string. The two digit cost parameter is the base-2 logarithm of the iteration count for the underlying Blowfish-based hashing algorithm and must be in range 04-31, values outside this range will cause crypt() to fail. "$2x$" hashes are potentially weak; "$2a$" hashes are compatible and mitigate this weakness. For new hashes, "$2y$" should be used. |
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377 | $algo = '$2y$'; // most secure |
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70 | daniel-mar | 378 | $cost = $options['cost']; |
63 | daniel-mar | 379 | $crypt_salt = $algo.str_pad($cost,2,'0',STR_PAD_LEFT).'$'.des_compat_salt(22).'$'; |
380 | } else if (($algo === PASSWORD_SHA256) && defined('CRYPT_SHA256')) { |
||
381 | // SHA-256 hash with a sixteen character salt prefixed with $5$. If the salt string starts with 'rounds=<N>$', the numeric value of N is used to indicate how many times the hashing loop should be executed, much like the cost parameter on Blowfish. The default number of rounds is 5000, there is a minimum of 1000 and a maximum of 999,999,999. Any selection of N outside this range will be truncated to the nearest limit. |
||
382 | $algo = '$5$'; |
||
70 | daniel-mar | 383 | $rounds = $options['rounds']; |
63 | daniel-mar | 384 | $crypt_salt = $algo.'rounds='.$rounds.'$'.des_compat_salt(16).'$'; |
385 | } else if (($algo === PASSWORD_SHA512) && defined('CRYPT_SHA512')) { |
||
386 | // SHA-512 hash with a sixteen character salt prefixed with $6$. If the salt string starts with 'rounds=<N>$', the numeric value of N is used to indicate how many times the hashing loop should be executed, much like the cost parameter on Blowfish. The default number of rounds is 5000, there is a minimum of 1000 and a maximum of 999,999,999. Any selection of N outside this range will be truncated to the nearest limit. |
||
387 | $algo = '$6$'; |
||
70 | daniel-mar | 388 | $rounds = $options['rounds']; |
63 | daniel-mar | 389 | $crypt_salt = $algo.'rounds='.$rounds.'$'.des_compat_salt(16).'$'; |
390 | } |
||
391 | |||
392 | if (!is_null($crypt_salt)) { |
||
64 | daniel-mar | 393 | // Algorithms: PASSWORD_STD_DES |
394 | // PASSWORD_EXT_DES |
||
395 | // PASSWORD_MD5 |
||
396 | // PASSWORD_BLOWFISH |
||
397 | // PASSWORD_SHA256 |
||
398 | // PASSWORD_SHA512 |
||
63 | daniel-mar | 399 | $out = crypt($password, $crypt_salt); |
400 | if (strlen($out) < 13) throw new Exception("crypt() failed"); |
||
401 | return $out; |
||
402 | } else if ($algo === PASSWORD_VTS_MCF1) { |
||
64 | daniel-mar | 403 | // Algorithms: PASSWORD_VTS_MCF1 |
63 | daniel-mar | 404 | $ver = '1'; |
70 | daniel-mar | 405 | $algo = $options['algo']; |
406 | $mode = $options['mode']; |
||
407 | $iterations = $options['iterations']; |
||
408 | $salt_len = isset($options['salt_length']) ? $options['salt_length'] : 50; // Note: salt_length is not a MCF option! It's just a hint for vts_password_hash() |
||
63 | daniel-mar | 409 | $salt = random_bytes_ex($salt_len, true, true); |
65 | daniel-mar | 410 | return vts_crypt_hash($algo, $password, $salt, $ver, $mode, $iterations); |
63 | daniel-mar | 411 | } else { |
64 | daniel-mar | 412 | // Algorithms: PASSWORD_DEFAULT |
413 | // PASSWORD_BCRYPT |
||
414 | // PASSWORD_ARGON2I |
||
415 | // PASSWORD_ARGON2ID |
||
63 | daniel-mar | 416 | return password_hash($password, $algo, $options); |
417 | } |
||
418 | } |
||
419 | |||
70 | daniel-mar | 420 | /** This function replaces password_needs_rehash() by adding additional algorithms |
421 | * supported by vts_password_hash(). |
||
422 | * @param string $hash The current hash |
||
423 | * @param string|int|null $algo Desired new default algo |
||
424 | * @param array $options Desired new default options |
||
425 | * @return bool True if algo or options of the current hash don't match the current desired values ($algo and $options), otherwise false. |
||
426 | */ |
||
427 | function vts_password_needs_rehash($hash, $algo, $options=array()) { |
||
428 | $options = vts_password_fill_default_options($algo, $options); |
||
429 | |||
430 | $info = vts_password_get_info($hash); |
||
431 | $algo2 = $info['algo']; |
||
432 | $options2 = $info['options']; |
||
433 | |||
434 | // Check if algorithm matches |
||
435 | if ($algo !== $algo2) return true; |
||
436 | |||
437 | if (vts_crypt_version($hash) == '1') { |
||
438 | if (isset($options['salt_length'])) { |
||
439 | // For VTS MCF 1.0, salt_length is a valid option for vts_password_hash(), |
||
440 | // but it is not a valid option inside the MCF options |
||
441 | // and it is not a valid option for vts_password_get_info(). |
||
442 | unset($options['salt_length']); |
||
443 | } |
||
444 | |||
74 | daniel-mar | 445 | // For PBKDF2, iterations=0 means: Default, depending on the algo |
72 | daniel-mar | 446 | if (($options['iterations'] == 0/*default*/) && ($options2['mode'] == PASSWORD_VTS_MCF1_MODE_PBKDF2)) { |
70 | daniel-mar | 447 | $algo = $options2['algo']; |
448 | $userland = !hash_pbkdf2_supported_natively($algo) && str_starts_with($algo, 'sha3-') && method_exists('\bb\Sha3\Sha3', 'hash_pbkdf2'); |
||
72 | daniel-mar | 449 | $options['iterations'] = _vts_password_default_iterations($algo, $userland); |
70 | daniel-mar | 450 | } |
451 | } |
||
452 | |||
453 | // Check if options match |
||
454 | if (count($options) !== count($options2)) return true; |
||
455 | foreach ($options as $name => $val) { |
||
456 | if ($options2[$name] != $val) return true; |
||
457 | } |
||
458 | return false; |
||
459 | } |
||
460 | |||
461 | /** This function extends password_verify() by adding ViaThinkSoft Modular Crypt Format 1.0. |
||
462 | * @param string $password to be checked |
||
463 | * @param string $hash Hash created by crypt(), password_hash(), or vts_password_hash(). |
||
464 | * @return bool true if password is valid |
||
465 | */ |
||
466 | function vts_password_verify($password, $hash): bool { |
||
467 | if (vts_crypt_version($hash) != '0') { |
||
468 | // Hash created by vts_password_hash(), or vts_crypt_hash() |
||
469 | return vts_crypt_verify($password, $hash); |
||
470 | } else { |
||
471 | // Hash created by vts_password_hash(), password_hash(), or crypt() |
||
472 | return password_verify($password, $hash); |
||
473 | } |
||
474 | } |
||
475 | |||
72 | daniel-mar | 476 | // --- Part 4: Functions which include a fallback to a pure-PHP sha3 implementation (requires https://github.com/danielmarschall/php-sha3 ) |
63 | daniel-mar | 477 | |
72 | daniel-mar | 478 | function hash_ex($algo, $data, $binary=false, $options=array()) { |
479 | if (!hash_supported_natively($algo) && str_starts_with($algo, 'sha3-') && method_exists('\bb\Sha3\Sha3', 'hash')) { |
||
480 | $bits = explode('-',$algo)[1]; |
||
481 | $hash = \bb\Sha3\Sha3::hash($data, $bits, $binary); |
||
482 | } else { |
||
483 | $hash = hash($algo, $data, $binary); |
||
484 | } |
||
485 | return $hash; |
||
486 | } |
||
487 | |||
488 | function hash_hmac_ex($algo, $data, $key, $binary=false) { |
||
489 | if (!hash_hmac_supported_natively($algo) && str_starts_with($algo, 'sha3-') && method_exists('\bb\Sha3\Sha3', 'hash_hmac')) { |
||
490 | $bits = explode('-',$algo)[1]; |
||
491 | $hash = \bb\Sha3\Sha3::hash_hmac($data, $key, $bits, $binary); |
||
492 | } else { |
||
493 | $hash = hash_hmac($algo, $data, $key, $binary); |
||
494 | } |
||
495 | return $hash; |
||
496 | } |
||
497 | |||
498 | function hash_pbkdf2_ex($algo, $password, $salt, &$iterations=0, $length=0, $binary=false) { |
||
499 | if (!hash_pbkdf2_supported_natively($algo) && str_starts_with($algo, 'sha3-') && method_exists('\bb\Sha3\Sha3', 'hash_pbkdf2')) { |
||
500 | if ($iterations == 0/*default*/) { |
||
501 | $iterations = _vts_password_default_iterations($algo, true); |
||
502 | } |
||
503 | $bits = explode('-',$algo)[1]; |
||
504 | $hash = \bb\Sha3\Sha3::hash_pbkdf2($password, $salt, $iterations, $bits, $length, $binary); |
||
505 | } else { |
||
506 | if ($iterations == 0/*default*/) { |
||
507 | $iterations = _vts_password_default_iterations($algo, false); |
||
508 | } |
||
509 | $hash = hash_pbkdf2($algo, $password, $salt, $iterations, $length, $binary); |
||
510 | } |
||
511 | return $hash; |
||
512 | } |
||
513 | |||
514 | // --- Part 5: Useful functions required by the crypt-functions |
||
515 | |||
64 | daniel-mar | 516 | define('BASE64_RFC4648_ALPHABET', '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz+/'); |
517 | define('BASE64_CRYPT_ALPHABET', './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'); |
||
518 | |||
63 | daniel-mar | 519 | function des_compat_salt($salt_len) { |
520 | if ($salt_len <= 0) return ''; |
||
64 | daniel-mar | 521 | $characters = BASE64_CRYPT_ALPHABET; |
63 | daniel-mar | 522 | $salt = ''; |
523 | $bytes = random_bytes_ex($salt_len, true, true); |
||
524 | for ($i=0; $i<$salt_len; $i++) { |
||
525 | $salt .= $characters[ord($bytes[$i]) % strlen($characters)]; |
||
526 | } |
||
527 | return $salt; |
||
528 | } |
||
529 | |||
70 | daniel-mar | 530 | function base64_int_encode($num, $len) { |
63 | daniel-mar | 531 | // https://stackoverflow.com/questions/15534982/which-iteration-rules-apply-on-crypt-using-crypt-ext-des |
64 | daniel-mar | 532 | $alphabet_raw = BASE64_CRYPT_ALPHABET; |
533 | $alphabet = str_split($alphabet_raw); |
||
534 | $arr = array(); |
||
535 | $base = sizeof($alphabet); |
||
536 | while ($num) { |
||
537 | $rem = $num % $base; |
||
538 | $num = (int)($num / $base); |
||
539 | $arr[] = $alphabet[$rem]; |
||
63 | daniel-mar | 540 | } |
64 | daniel-mar | 541 | $string = implode($arr); |
70 | daniel-mar | 542 | return str_pad($string, $len, '.', STR_PAD_RIGHT); |
63 | daniel-mar | 543 | } |
544 | |||
70 | daniel-mar | 545 | function base64_int_decode($base64) { |
546 | $num = 0; |
||
547 | for ($i=strlen($base64)-1;$i>=0;$i--) { |
||
548 | $num += strpos(BASE64_CRYPT_ALPHABET, $base64[$i])*pow(strlen(BASE64_CRYPT_ALPHABET),$i); |
||
549 | } |
||
550 | return $num; |
||
551 | } |
||
552 | |||
63 | daniel-mar | 553 | function crypt_radix64_encode($str) { |
554 | $x = $str; |
||
555 | $x = base64_encode($x); |
||
64 | daniel-mar | 556 | $x = rtrim($x, '='); // remove padding |
63 | daniel-mar | 557 | $x = strtr($x, BASE64_RFC4648_ALPHABET, BASE64_CRYPT_ALPHABET); |
558 | return $x; |
||
559 | } |
||
560 | |||
561 | function crypt_radix64_decode($str) { |
||
562 | $x = $str; |
||
563 | $x = strtr($x, BASE64_CRYPT_ALPHABET, BASE64_RFC4648_ALPHABET); |
||
564 | $x = base64_decode($x); |
||
565 | return $x; |
||
566 | } |
||
567 | |||
67 | daniel-mar | 568 | function hash_supported_natively($algo) { |
569 | if (version_compare(PHP_VERSION, '5.1.2') >= 0) { |
||
570 | return in_array($algo, hash_algos()); |
||
571 | } else { |
||
572 | return false; |
||
573 | } |
||
574 | } |
||
575 | |||
576 | function hash_hmac_supported_natively($algo): bool { |
||
577 | if (version_compare(PHP_VERSION, '7.2.0') >= 0) { |
||
578 | return in_array($algo, hash_hmac_algos()); |
||
579 | } else if (version_compare(PHP_VERSION, '5.1.2') >= 0) { |
||
580 | return in_array($algo, hash_algos()); |
||
581 | } else { |
||
582 | return false; |
||
583 | } |
||
584 | } |
||
585 | |||
586 | function hash_pbkdf2_supported_natively($algo) { |
||
587 | return hash_supported_natively($algo); |
||
588 | } |
||
589 | |||
70 | daniel-mar | 590 | function vts_password_fill_default_options($algo, $options) { |
591 | if ($algo === PASSWORD_STD_DES) { |
||
592 | // No options |
||
593 | } else if ($algo === PASSWORD_EXT_DES) { |
||
594 | if (!isset($options['iterations'])) { |
||
595 | $options['iterations'] = PASSWORD_EXT_DES_DEFAULT_ITERATIONS; |
||
596 | } |
||
597 | } else if ($algo === PASSWORD_MD5) { |
||
598 | // No options |
||
599 | } else if ($algo === PASSWORD_BLOWFISH) { |
||
600 | if (!isset($options['cost'])) { |
||
601 | $options['cost'] = PASSWORD_BLOWFISH_DEFAULT_COST; |
||
602 | } |
||
603 | } else if ($algo === PASSWORD_SHA256) { |
||
604 | if (!isset($options['rounds'])) { |
||
605 | $options['rounds'] = PASSWORD_SHA256_DEFAULT_ROUNDS; |
||
606 | } |
||
607 | } else if ($algo === PASSWORD_SHA512) { |
||
608 | if (!isset($options['rounds'])) { |
||
609 | $options['rounds'] = PASSWORD_SHA512_DEFAULT_ROUNDS; |
||
610 | } |
||
611 | } else if ($algo === PASSWORD_VTS_MCF1) { |
||
612 | if (!isset($options['algo'])) { |
||
613 | $options['algo'] = PASSWORD_VTS_MCF1_DEFAULT_ALGO; |
||
614 | } |
||
615 | if (!isset($options['mode'])) { |
||
616 | $options['mode'] = PASSWORD_VTS_MCF1_DEFAULT_MODE; |
||
617 | } |
||
618 | if ($options['mode'] == PASSWORD_VTS_MCF1_MODE_PBKDF2) { |
||
619 | if (!isset($options['iterations'])) { |
||
620 | $options['iterations'] = PASSWORD_VTS_MCF1_DEFAULT_ITERATIONS; |
||
621 | } |
||
622 | } else { |
||
74 | daniel-mar | 623 | $options['iterations'] = isset($options['iterations']) ? $options['iterations'] : 0; |
70 | daniel-mar | 624 | } |
625 | } |
||
626 | return $options; |
||
627 | } |
||
628 | |||
72 | daniel-mar | 629 | function _vts_password_default_iterations($algo, $userland) { |
630 | if ($userland) { |
||
631 | return 100; // because the userland implementation is EXTREMELY slow, we must choose a small value, sorry... |
||
632 | } else { |
||
633 | // Recommendations taken from https://cheatsheetseries.owasp.org/cheatsheets/Password_Storage_Cheat_Sheet.html#pbkdf2 |
||
634 | // Note that hash_pbkdf2() implements PBKDF2-HMAC-* |
||
635 | if ($algo == 'sha3-512') return 100000; |
||
636 | else if ($algo == 'sha3-384') return 100000; |
||
637 | else if ($algo == 'sha3-256') return 100000; |
||
638 | else if ($algo == 'sha3-224') return 100000; |
||
639 | else if ($algo == 'sha512') return 210000; // value by owasp.org cheatcheat (28 February 2023) |
||
640 | else if ($algo == 'sha512/256') return 210000; // value by owasp.org cheatcheat (28 February 2023) |
||
641 | else if ($algo == 'sha512/224') return 210000; // value by owasp.org cheatcheat (28 February 2023) |
||
642 | else if ($algo == 'sha384') return 600000; |
||
643 | else if ($algo == 'sha256') return 600000; // value by owasp.org cheatcheat (28 February 2023) |
||
644 | else if ($algo == 'sha224') return 600000; |
||
645 | else if ($algo == 'sha1') return 1300000; // value by owasp.org cheatcheat (28 February 2023) |
||
646 | else if ($algo == 'md5') return 5000000; |
||
647 | else return 5000; |
||
648 | } |
||
649 | } |
||
63 | daniel-mar | 650 | |
72 | daniel-mar | 651 | // --- Part 6: Selftest |
652 | |||
73 | daniel-mar | 653 | /* |
70 | daniel-mar | 654 | for ($i=0; $i<9999; $i++) { |
655 | assert($i===base64_int_decode(base64_int_encode($i,4))); |
||
656 | } |
||
657 | |||
64 | daniel-mar | 658 | $rnd = random_bytes_ex(50, true, true); |
659 | assert(crypt_radix64_decode(crypt_radix64_encode($rnd)) === $rnd); |
||
63 | daniel-mar | 660 | |
64 | daniel-mar | 661 | $password = random_bytes_ex(20, false, true); |
70 | daniel-mar | 662 | |
663 | assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_STD_DES))); |
||
664 | //echo "'$dummy' ".strlen($dummy)."\n"; |
||
665 | //var_dump(vts_password_get_info($dummy)); |
||
666 | |||
667 | assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_EXT_DES))); |
||
668 | //echo "'$dummy' ".strlen($dummy)."\n"; |
||
669 | //var_dump(vts_password_get_info($dummy)); |
||
670 | |||
671 | assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_MD5))); |
||
672 | //echo "'$dummy' ".strlen($dummy)."\n"; |
||
673 | //var_dump(vts_password_get_info($dummy)); |
||
674 | |||
675 | assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_BLOWFISH))); |
||
676 | //echo "'$dummy' ".strlen($dummy)."\n"; |
||
677 | //var_dump(vts_password_get_info($dummy)); |
||
678 | |||
679 | assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_SHA256))); |
||
680 | //echo "'$dummy' ".strlen($dummy)."\n"; |
||
681 | //var_dump(vts_password_get_info($dummy)); |
||
682 | |||
683 | assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_SHA512))); |
||
684 | //echo "'$dummy' ".strlen($dummy)."\n"; |
||
685 | //var_dump(vts_password_get_info($dummy)); |
||
686 | |||
687 | assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_VTS_MCF1, array( |
||
65 | daniel-mar | 688 | 'algo' => 'sha3-512', |
689 | 'mode' => 'pbkdf2', |
||
70 | daniel-mar | 690 | 'iterations' => 0 |
65 | daniel-mar | 691 | )))); |
70 | daniel-mar | 692 | //echo "'$dummy' ".strlen($dummy)."\n"; |
693 | //var_dump(vts_password_get_info($dummy)); |
||
694 | assert(false===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
||
695 | 'salt_length' => 51, |
||
696 | 'algo' => 'sha3-512', |
||
697 | 'mode' => 'pbkdf2', |
||
698 | 'iterations' => 0 |
||
699 | ))); |
||
700 | assert(true===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
||
701 | 'salt_length' => 50, |
||
702 | 'algo' => 'sha3-256', |
||
703 | 'mode' => 'pbkdf2', |
||
704 | 'iterations' => 0 |
||
705 | ))); |
||
706 | |||
74 | daniel-mar | 707 | assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_VTS_MCF1, array( |
708 | 'algo' => 'sha3-512', |
||
709 | 'mode' => 'sps', |
||
710 | 'iterations' => 2 |
||
711 | )))); |
||
712 | //echo "'$dummy' ".strlen($dummy)."\n"; |
||
713 | //var_dump(vts_password_get_info($dummy)); |
||
714 | assert(false===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
||
715 | 'salt_length' => 51, |
||
716 | 'algo' => 'sha3-512', |
||
717 | 'mode' => 'sps', |
||
718 | 'iterations' => 2 |
||
719 | ))); |
||
720 | assert(true===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
||
721 | 'salt_length' => 50, |
||
722 | 'algo' => 'sha3-256', |
||
723 | 'mode' => 'sps', |
||
724 | 'iterations' => 2 |
||
725 | ))); |
||
726 | |||
727 | assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_VTS_MCF1, array( |
||
728 | 'algo' => 'sha3-512', |
||
729 | 'mode' => 'hmac', |
||
730 | 'iterations' => 2 |
||
731 | )))); |
||
732 | //echo "'$dummy' ".strlen($dummy)."\n"; |
||
733 | //var_dump(vts_password_get_info($dummy)); |
||
734 | assert(false===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
||
735 | 'salt_length' => 51, |
||
736 | 'algo' => 'sha3-512', |
||
737 | 'mode' => 'hmac', |
||
738 | 'iterations' => 2 |
||
739 | ))); |
||
740 | assert(true===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
||
741 | 'salt_length' => 50, |
||
742 | 'algo' => 'sha3-256', |
||
743 | 'mode' => 'hmac', |
||
744 | 'iterations' => 2 |
||
745 | ))); |
||
73 | daniel-mar | 746 | */ |