Rev 59 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 58 | daniel-mar | 1 | <?php |
| 2 | |||
| 3 | /* |
||
| 4 | * ViaThinkSoft Modular Crypt Format 1.0 |
||
| 5 | * Revision 2023-02-26 |
||
| 6 | * Copyright 2023 Daniel Marschall, ViaThinkSoft |
||
| 7 | * |
||
| 8 | * Licensed under the Apache License, Version 2.0 (the "License"); |
||
| 9 | * you may not use this file except in compliance with the License. |
||
| 10 | * You may obtain a copy of the License at |
||
| 11 | * |
||
| 12 | * http://www.apache.org/licenses/LICENSE-2.0 |
||
| 13 | * |
||
| 14 | * Unless required by applicable law or agreed to in writing, software |
||
| 15 | * distributed under the License is distributed on an "AS IS" BASIS, |
||
| 16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
||
| 17 | * See the License for the specific language governing permissions and |
||
| 18 | * limitations under the License. |
||
| 19 | */ |
||
| 20 | |||
| 21 | /* |
||
| 22 | |||
| 23 | ViaThinkSoft Modular Crypt Format 1.0 performs a simple hash or HMAC operation. |
||
| 24 | No key derivation function or iterations are performed. |
||
| 25 | |||
| 26 | Format: |
||
| 27 | $1.3.6.1.4.1.37476.3.0.1.1$a=<algo>,m=<mode>$<salt>$<hash> |
||
| 28 | |||
| 29 | where <algo> is any valid hash algorithm (name scheme of PHP hash_algos() preferred), e.g. |
||
| 30 | sha3-512 |
||
| 31 | sha3-384 |
||
| 32 | sha3-256 |
||
| 33 | sha3-224 |
||
| 34 | sha512 |
||
| 35 | sha512/256 |
||
| 36 | sha512/224 |
||
| 37 | sha384 |
||
| 38 | sha256 |
||
| 39 | sha224 |
||
| 40 | sha1 |
||
| 41 | md5 |
||
| 42 | |||
| 43 | Valid <mode> : |
||
| 44 | sp = salt + password |
||
| 45 | ps = password + salt |
||
| 46 | sps = salt + password + salt |
||
| 47 | hmac = HMAC (salt is the key) |
||
| 48 | |||
| 49 | Link to the online specification: |
||
| 50 | https://oidplus.viathinksoft.com/oidplus/?goto=oid%3A1.3.6.1.4.1.37476.3.0.1.1 |
||
| 51 | |||
| 52 | Reference implementation in PHP: |
||
| 53 | https://github.com/danielmarschall/php_utils/blob/master/vts_crypt.inc.php |
||
| 54 | |||
| 55 | */ |
||
| 56 | |||
| 57 | 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) } |
||
| 58 | |||
| 59 | function crypt_radix64($str) { |
||
| 60 | $rfc4648_base64 = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '+', '/', '='); |
||
| 61 | $crypt_base64 = array('.', '/', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', ''); |
||
| 62 | |||
| 63 | $x = base64_encode($str); |
||
| 64 | $x = str_replace($rfc4648_base64, $crypt_base64, $x); |
||
| 65 | return $x; |
||
| 66 | } |
||
| 67 | |||
| 68 | function crypt_modular_format($id, $bin_salt, $bin_hash, $params=null) { |
||
| 69 | // $<id>[$<param>=<value>(,<param>=<value>)*][$<salt>[$<hash>]] |
||
| 70 | $out = '$'.$id; |
||
| 71 | if (!is_null($params)) { |
||
| 72 | $ary_params = array(); |
||
| 73 | //ksort($params); |
||
| 74 | foreach ($params as $name => $value) { |
||
| 75 | $ary_params[] = "$name=$value"; |
||
| 76 | } |
||
| 77 | $out .= '$'.implode(',',$ary_params); |
||
| 78 | } |
||
| 79 | $out .= '$'.crypt_radix64($bin_salt); |
||
| 80 | $out .= '$'.crypt_radix64($bin_hash); |
||
| 81 | return $out; |
||
| 82 | } |
||
| 83 | |||
| 84 | function vts_crypt($algo, $str_password, $str_salt, $ver='1', $mode='ps') { |
||
| 85 | if ($ver == '1') { |
||
| 86 | if ($mode == 'sp') { |
||
| 87 | $payload = $str_salt.$str_password; |
||
| 88 | if (($algo === 'sha3-512') && !in_array($algo, hash_algos()) && function_exists('sha3_512')) { |
||
| 89 | $bin_hash = sha3_512($payload, true); |
||
| 90 | } else { |
||
| 91 | $bin_hash = hash($algo, $payload, true); |
||
| 92 | } |
||
| 93 | } else if ($mode == 'ps') { |
||
| 94 | $payload = $str_password.$str_salt; |
||
| 95 | if (($algo === 'sha3-512') && !in_array($algo, hash_algos()) && function_exists('sha3_512')) { |
||
| 96 | $bin_hash = sha3_512($payload, true); |
||
| 97 | } else { |
||
| 98 | $bin_hash = hash($algo, $payload, true); |
||
| 99 | } |
||
| 100 | } else if ($mode == 'sps') { |
||
| 101 | $payload = $str_salt.$str_password.$str_salt; |
||
| 102 | if (($algo === 'sha3-512') && !in_array($algo, hash_algos()) && function_exists('sha3_512')) { |
||
| 103 | $bin_hash = sha3_512($payload, true); |
||
| 104 | } else { |
||
| 105 | $bin_hash = hash($algo, $payload, true); |
||
| 106 | } |
||
| 107 | } else if ($mode == 'hmac') { |
||
| 108 | // Note: Actually, we should use hash_hmac_algos(), but this requires PHP 7.2, and we would like to stay compatible with PHP 7.0 for now |
||
| 109 | if (($algo === 'sha3-512') && !in_array($algo, hash_algos()) && function_exists('sha3_512_hmac')) { |
||
| 110 | $bin_hash = sha3_512_hmac($str_password, $str_salt, true); |
||
| 111 | } else { |
||
| 112 | $bin_hash = hash_hmac($algo, $str_password, $str_salt, true); |
||
| 113 | } |
||
| 114 | } else { |
||
| 115 | throw new Exception("Invalid VTS crypt version 1 mode. Expect sp, ps, sps, or hmac."); |
||
| 116 | } |
||
| 117 | $bin_salt = $str_salt; |
||
| 118 | return crypt_modular_format(OID_MCF_VTS_V1, $bin_salt, $bin_hash, array('a'=>$algo,'m'=>$mode)); |
||
| 119 | } else { |
||
| 120 | throw new Exception("Invalid VTS crypt version, except 1."); |
||
| 121 | } |
||
| 122 | } |
||
| 123 | |||
| 124 | function vts_crypt_convert_from_old_oidplus($authkey, $salt) { |
||
| 125 | if (preg_match('@^A1([abcd])#(.+):(.+)$@', $authkey, $m)) { |
||
| 126 | // A1a#hashalgo:X with X being H(salt+password) in hex- or base64-notation |
||
| 127 | // A1b#hashalgo:X with X being H(password+salt) in hex- or base64-notation |
||
| 128 | // A1c#hashalgo:X with X being H(salt+password+salt) in hex- or base64-notation |
||
| 129 | // A1d#hashalgo:X with X being H_HMAC(password,salt) in hex- or base64-notation |
||
| 130 | $mode = ''; // avoid PHPstan warning |
||
| 131 | if ($m[1] == 'a') $mode = 'sp'; |
||
| 132 | else if ($m[1] == 'b') $mode = 'ps'; |
||
| 133 | else if ($m[1] == 'c') $mode = 'sps'; |
||
| 134 | else if ($m[1] == 'd') $mode = 'hmac'; |
||
| 135 | else assert(false); |
||
| 136 | $algo = $m[2]; |
||
| 137 | $bin_salt = $salt; |
||
| 138 | if (($algo == 'sha3-512') || ($algo == 'sha3-384') || ($algo == 'sha512') || ($algo == 'sha384')) { |
||
| 139 | $bin_hash = base64_decode($m[3]); |
||
| 140 | } else { |
||
| 141 | $bin_hash = hex2bin($m[3]); |
||
| 142 | } |
||
| 143 | return crypt_modular_format(OID_MCF_VTS_V1, $bin_salt, $bin_hash, array('a'=>$algo,'m'=>$mode)); |
||
| 144 | } else if (preg_match('@^A2#(.+)$@', $authkey, $m)) { |
||
| 145 | // A2#X with X being sha3(salt+password) in base64-notation |
||
| 146 | $mode = 'sp'; |
||
| 147 | $algo = 'sha3-512'; |
||
| 148 | $bin_salt = $salt; |
||
| 149 | $bin_hash = base64_decode($m[1]); |
||
| 150 | return crypt_modular_format(OID_MCF_VTS_V1, $bin_salt, $bin_hash, array('a'=>$algo,'m'=>$mode)); |
||
| 151 | } else if (preg_match('@^A3#(.+)$@', $authkey, $m)) { |
||
| 152 | // A3#X with X being bcrypt [not VTS hash!] |
||
| 153 | return $m[1]; |
||
| 154 | } else { |
||
| 155 | // Nothing to convert |
||
| 156 | return $authkey; |
||
| 157 | } |
||
| 158 | } |