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| Rev | Author | Line No. | Line |
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| 30 | daniel-mar | 1 | <?php |
| 2 | |||
| 3 | /* |
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| 4 | * OpenSSL php functions implemented using phpseclib |
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| 5 | * Copyright 2022 Daniel Marschall, ViaThinkSoft |
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| 6 | * Version 2022-04-09 |
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| 7 | * |
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| 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 | // How to use this supplement: |
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| 22 | // 1. Include phpseclib using composer and include the autoloader |
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| 23 | // 2. Then, include this file. The openssl functions are now available. |
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| 24 | |||
| 25 | // ATTENTION: This supplement/polyfill does only implement a few openssl_*() functions, |
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| 26 | // and only a few algorithms: AES and RSA! Feel free to extend this library! |
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| 27 | // The sign/verify and encrypt/decrypt functions should be binary compatible with |
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| 28 | // the actual openssl functions. |
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| 29 | |||
| 30 | if (!function_exists('openssl_pkey_new') && class_exists('\\phpseclib3\\Crypt\\RSA')) { |
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| 31 | |||
| 32 | define('OPENSSL_SUPPLEMENT', 1); |
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| 33 | |||
| 34 | $openssl_supplement_last_error = ''; |
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| 35 | |||
| 36 | if (!defined('OPENSSL_KEYTYPE_RSA')) define('OPENSSL_KEYTYPE_RSA', 0); |
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| 37 | |||
| 38 | if (!defined('OPENSSL_RAW_DATA')) define('OPENSSL_RAW_DATA', 1); |
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| 39 | if (!defined('OPENSSL_ZERO_PADDING')) define('OPENSSL_ZERO_PADDING', 2); |
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| 40 | |||
| 41 | if (!defined('OPENSSL_ALGO_SHA1')) define('OPENSSL_ALGO_SHA1', 1); |
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| 42 | if (!defined('OPENSSL_ALGO_SHA224')) define('OPENSSL_ALGO_SHA224', 6); |
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| 43 | if (!defined('OPENSSL_ALGO_SHA256')) define('OPENSSL_ALGO_SHA256', 7); |
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| 44 | if (!defined('OPENSSL_ALGO_SHA384')) define('OPENSSL_ALGO_SHA384', 8); |
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| 45 | if (!defined('OPENSSL_ALGO_SHA512')) define('OPENSSL_ALGO_SHA512', 9); |
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| 46 | if (!defined('OPENSSL_ALGO_RMD160')) define('OPENSSL_ALGO_RMD160', 10); |
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| 47 | if (!defined('OPENSSL_ALGO_MD5')) define('OPENSSL_ALGO_MD5', 2); |
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| 48 | if (!defined('OPENSSL_ALGO_MD4')) define('OPENSSL_ALGO_MD4', 3); |
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| 49 | |||
| 50 | function openssl_pkey_new($pkey_config=null) { |
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| 51 | try { |
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| 52 | $algo = $pkey_config && isset($pkey_config["private_key_type"]) ? $pkey_config["private_key_type"] : OPENSSL_KEYTYPE_RSA; |
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| 53 | $bits = $pkey_config && isset($pkey_config["private_key_bits"]) ? $pkey_config["private_key_bits"] : 2048; |
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| 54 | |||
| 55 | if ($algo == OPENSSL_KEYTYPE_RSA) { |
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| 56 | $private = \phpseclib3\Crypt\RSA::createKey($bits); |
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| 57 | } else { |
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| 58 | throw new Exception("Algo not implemented"); |
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| 59 | } |
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| 60 | |||
| 61 | $private = $private->withPadding(\phpseclib3\Crypt\RSA::ENCRYPTION_PKCS1 | \phpseclib3\Crypt\RSA::SIGNATURE_PKCS1); |
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| 62 | |||
| 63 | $public = $private->getPublicKey()->withPadding(\phpseclib3\Crypt\RSA::ENCRYPTION_PKCS1 | \phpseclib3\Crypt\RSA::SIGNATURE_PKCS1); |
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| 64 | |||
| 65 | return array($algo, $bits, $private, $public); |
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| 66 | } catch (Exception $e) { |
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| 67 | global $openssl_supplement_last_error; |
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| 68 | $openssl_supplement_last_error = $e->getMessage(); |
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| 69 | return false; |
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| 70 | } |
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| 71 | } |
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| 72 | |||
| 73 | function openssl_pkey_export($res, &$privKey, $passphrase = null, $options = null) { |
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| 74 | try { |
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| 75 | if (!is_null($passphrase)) throw new Exception("passphrase not implemented"); |
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| 76 | //if (!is_null($options)) throw new Exception("options not implemented"); |
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| 77 | $privKey = $res[2].""; |
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| 78 | return true; |
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| 79 | } catch (Exception $e) { |
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| 80 | global $openssl_supplement_last_error; |
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| 81 | $openssl_supplement_last_error = $e->getMessage(); |
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| 82 | return false; |
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| 83 | } |
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| 84 | } |
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| 85 | |||
| 86 | function openssl_pkey_get_details($res) { |
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| 87 | return array( |
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| 88 | "bits" => $res[1], |
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| 89 | "key" => $res[3]."", |
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| 90 | "type" => $res[0] |
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| 91 | ); |
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| 92 | } |
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| 93 | |||
| 94 | function openssl_public_encrypt($data, &$encrypted, $pubKey) { |
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| 95 | try { |
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| 96 | if (is_string($pubKey)) $pubKey = openssl_pkey_get_public($pubKey); |
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| 97 | $encrypted = $pubKey->encrypt($data); |
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| 98 | return true; |
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| 99 | } catch (Exception $e) { |
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| 100 | global $openssl_supplement_last_error; |
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| 101 | $openssl_supplement_last_error = $e->getMessage(); |
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| 102 | return false; |
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| 103 | } |
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| 104 | } |
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| 105 | |||
| 106 | function openssl_private_decrypt($encrypted, &$decrypted, $privKey) { |
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| 107 | try { |
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| 108 | if (is_string($privKey)) $privKey = openssl_pkey_get_private($privKey); |
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| 109 | $decrypted = $privKey->decrypt($encrypted); |
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| 110 | return true; |
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| 111 | } catch (Exception $e) { |
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| 112 | global $openssl_supplement_last_error; |
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| 113 | $openssl_supplement_last_error = $e->getMessage(); |
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| 114 | return false; |
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| 115 | } |
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| 116 | } |
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| 117 | |||
| 118 | function openssl_verify($msg, $signature, $public, $algorithm=OPENSSL_ALGO_SHA1) { |
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| 119 | try { |
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| 120 | if ($algorithm == OPENSSL_ALGO_SHA1) $algorithm = 'SHA1'; |
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| 121 | if ($algorithm == OPENSSL_ALGO_SHA224) $algorithm = 'SHA224'; |
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| 122 | if ($algorithm == OPENSSL_ALGO_SHA256) $algorithm = 'SHA256)'; |
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| 123 | if ($algorithm == OPENSSL_ALGO_SHA384) $algorithm = 'SHA384'; |
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| 124 | if ($algorithm == OPENSSL_ALGO_SHA512) $algorithm = 'SHA512'; |
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| 125 | if ($algorithm == OPENSSL_ALGO_RMD160) $algorithm = 'RMD160'; |
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| 126 | if ($algorithm == OPENSSL_ALGO_MD5) $algorithm = 'MD5'; |
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| 127 | if ($algorithm == OPENSSL_ALGO_MD4) $algorithm = 'MD4'; |
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| 128 | if (is_string($public)) $public = openssl_pkey_get_public($public); |
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| 129 | return $public->withHash($algorithm)->verify($msg, $signature) ? 1 : 0; |
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| 130 | } catch (Exception $e) { |
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| 131 | global $openssl_supplement_last_error; |
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| 132 | $openssl_supplement_last_error = $e->getMessage(); |
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| 133 | return false; |
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| 134 | } |
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| 135 | } |
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| 136 | |||
| 137 | function openssl_sign($msg, &$signature, $private, $algorithm=OPENSSL_ALGO_SHA1) { |
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| 138 | try { |
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| 139 | if ($algorithm == OPENSSL_ALGO_SHA1) $algorithm = 'SHA1'; |
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| 140 | if ($algorithm == OPENSSL_ALGO_SHA224) $algorithm = 'SHA224'; |
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| 141 | if ($algorithm == OPENSSL_ALGO_SHA256) $algorithm = 'SHA256)'; |
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| 142 | if ($algorithm == OPENSSL_ALGO_SHA384) $algorithm = 'SHA384'; |
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| 143 | if ($algorithm == OPENSSL_ALGO_SHA512) $algorithm = 'SHA512'; |
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| 144 | if ($algorithm == OPENSSL_ALGO_RMD160) $algorithm = 'RMD160'; |
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| 145 | if ($algorithm == OPENSSL_ALGO_MD5) $algorithm = 'MD5'; |
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| 146 | if ($algorithm == OPENSSL_ALGO_MD4) $algorithm = 'MD4'; |
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| 147 | if (is_string($private)) $private = openssl_pkey_get_private($private); |
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| 148 | $signature = $private->withHash($algorithm)->sign($msg); |
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| 149 | return true; |
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| 150 | } catch (Exception $e) { |
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| 151 | global $openssl_supplement_last_error; |
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| 152 | $openssl_supplement_last_error = $e->getMessage(); |
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| 153 | return false; |
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| 154 | } |
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| 155 | } |
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| 156 | |||
| 157 | function openssl_error_string() { |
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| 158 | global $openssl_supplement_last_error; |
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| 159 | return $openssl_supplement_last_error; |
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| 160 | } |
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| 161 | |||
| 162 | function openssl_random_pseudo_bytes($len) { |
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| 163 | /* |
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| 164 | if (function_exists('openssl_random_pseudo_bytes')) { |
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| 165 | $a = openssl_random_pseudo_bytes($len); |
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| 166 | if ($a) return $a; |
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| 167 | } |
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| 168 | */ |
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| 169 | |||
| 170 | if (function_exists('mcrypt_create_iv')) { |
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| 171 | $a = bin2hex(mcrypt_create_iv($len, MCRYPT_DEV_URANDOM)); |
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| 172 | if ($a) return $a; |
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| 173 | } |
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| 174 | |||
| 175 | if (function_exists('random_bytes')) { |
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| 176 | $a = random_bytes($len); |
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| 177 | if ($a) return $a; |
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| 178 | } |
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| 179 | |||
| 180 | // Fallback to non-secure RNG |
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| 181 | $a = ''; |
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| 182 | while (strlen($a) < $len*2) { |
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| 183 | $a .= sha1(uniqid((string)mt_rand(), true)); |
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| 184 | } |
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| 185 | $a = substr($a, 0, $len*2); |
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| 186 | return hex2bin($a); |
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| 187 | } |
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| 188 | |||
| 189 | function openssl_encrypt($data, $cipher_algo, $passphrase, $options=0, $iv="", &$tag=null, $aad="", $tag_length=16) { |
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| 190 | try { |
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| 191 | if (!is_null($tag)) throw new Exception("tag not implemented"); |
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| 192 | if ($aad != "") throw new Exception("aad not implemented"); |
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| 193 | if ($tag_length != 16) throw new Exception("tag_length not implemented"); |
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| 194 | if (!preg_match('@AES\\-(.+)\\-(.+)@i', $cipher_algo, $m)) throw new Exception("Algo not implemented"); |
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| 195 | if (($options & OPENSSL_ZERO_PADDING) != 0) throw new Exception("OPENSSL_ZERO_PADDING not implemented"); |
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| 196 | $aes = new \phpseclib3\Crypt\AES($m[2]); |
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| 197 | $aes->setKeyLength($m[1]); |
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| 198 | $passphrase = substr($passphrase, 0, $m[1]/8); |
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| 199 | $passphrase = str_pad($passphrase, $m[1]/8, "\0", STR_PAD_RIGHT); |
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| 200 | $aes->setKey($passphrase); |
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| 201 | $aes->setIV($iv); |
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| 202 | $res = $aes->encrypt($data); |
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| 203 | if (($options & OPENSSL_RAW_DATA) == 0) $res = base64_encode($res); |
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| 204 | return $res; |
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| 205 | } catch (Exception $e) { |
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| 206 | global $openssl_supplement_last_error; |
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| 207 | $openssl_supplement_last_error = $e->getMessage(); |
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| 208 | return false; |
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| 209 | } |
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| 210 | } |
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| 211 | |||
| 212 | function openssl_decrypt($data, $cipher_algo, $passphrase, $options=0, $iv="", $tag=null, $aad="") { |
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| 213 | try { |
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| 214 | if (!is_null($tag)) throw new Exception("tag not implemented"); |
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| 215 | if ($aad != "") throw new Exception("aad not implemented"); |
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| 216 | if (!preg_match('@AES\\-(.+)\\-(.+)@i', $cipher_algo, $m)) throw new Exception("Algo not implemented"); |
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| 217 | if (($options & OPENSSL_ZERO_PADDING) != 0) throw new Exception("OPENSSL_ZERO_PADDING not implemented"); |
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| 218 | $aes = new \phpseclib3\Crypt\AES($m[2]); |
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| 219 | $aes->setKeyLength($m[1]); |
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| 220 | $passphrase = substr($passphrase, 0, $m[1]/8); |
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| 221 | $passphrase = str_pad($passphrase, $m[1]/8, "\0", STR_PAD_RIGHT); |
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| 222 | $aes->setKey($passphrase); |
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| 223 | $aes->setIV($iv); |
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| 224 | if (($options & OPENSSL_RAW_DATA) == 0) $data = base64_decode($data); |
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| 225 | return $aes->decrypt($data); |
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| 226 | } catch (Exception $e) { |
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| 227 | global $openssl_supplement_last_error; |
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| 228 | $openssl_supplement_last_error = $e->getMessage(); |
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| 229 | return false; |
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| 230 | } |
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| 231 | } |
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| 232 | |||
| 233 | function openssl_free_key($key) { |
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| 234 | // does nothing |
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| 235 | } |
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| 236 | |||
| 237 | function openssl_pkey_get_private($key, $passphrase=null) { |
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| 238 | try { |
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| 239 | if (substr($key,0,7) === 'file://') { |
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| 240 | if (!file_exists($file = substr($key, 7))) throw new Exception("file not found"); |
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| 241 | $key = file_get_contents($file); |
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| 242 | } |
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| 243 | if (is_null($passphrase)) $passphrase = false; |
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| 244 | $privKey = \phpseclib3\Crypt\RSA::load($key, $passphrase); |
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| 245 | return $privKey->withPadding(\phpseclib3\Crypt\RSA::ENCRYPTION_PKCS1 | \phpseclib3\Crypt\RSA::SIGNATURE_PKCS1); /** @phpstan-ignore-line */ // Call to an undefined method phpseclib3\Crypt\Common\AsymmetricKey::withPadding(). |
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| 246 | } catch (Exception $e) { |
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| 247 | global $openssl_supplement_last_error; |
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| 248 | $openssl_supplement_last_error = $e->getMessage(); |
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| 249 | return false; |
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| 250 | } |
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| 251 | } |
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| 252 | |||
| 253 | function openssl_pkey_get_public($public_key) { |
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| 254 | try { |
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| 255 | if (substr($public_key,0,7) === 'file://') { |
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| 256 | if (!file_exists($file = substr($public_key, 7))) throw new Exception("file not found"); |
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| 257 | $public_key = file_get_contents($file); |
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| 258 | } |
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| 259 | $pubKey = \phpseclib3\Crypt\RSA::load($public_key); |
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| 260 | return $pubKey->withPadding(\phpseclib3\Crypt\RSA::ENCRYPTION_PKCS1 | \phpseclib3\Crypt\RSA::SIGNATURE_PKCS1); /** @phpstan-ignore-line */ // Call to an undefined method phpseclib3\Crypt\Common\AsymmetricKey::withPadding(). |
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| 261 | } catch (Exception $e) { |
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| 262 | global $openssl_supplement_last_error; |
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| 263 | $openssl_supplement_last_error = $e->getMessage(); |
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| 264 | return false; |
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| 265 | } |
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| 266 | } |
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| 267 | |||
| 268 | } |