看注释，啥也不说了！！！
加密算法类：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | <?php /** * 常用对称加密算法类 * 支持密钥：64/128/256 bit（字节长度8/16/32） * 支持算法：DES/AES（根据密钥长度自动匹配使用：DES:64bit AES:128/256bit） * 支持模式：CBC/ECB/OFB/CFB * 密文编码：base64字符串/十六进制字符串/二进制字符串流 * 填充方式: PKCS5Padding（DES） */ class Xcrypt{ private $mcrypt; private $key; private $mode; private $iv; private $blocksize; /** * 构造函数 * * @param string 密钥 * @param string 模式 * @param string 向量（"off":不使用 / "auto":自动 / 其他:指定值，长度同密钥） */ public function __construct($key, $mode = 'cbc', $iv = "off"){ switch (strlen($key)){ case 8: $this->mcrypt = MCRYPT_DES; break; case 16: $this->mcrypt = MCRYPT_RIJNDAEL_128; break; case 32: $this->mcrypt = MCRYPT_RIJNDAEL_256; break; default: die("Key size must be 8/16/32"); } $this->key = $key; switch (strtolower($mode)){ case 'ofb': $this->mode = MCRYPT_MODE_OFB; if ($iv == 'off') die('OFB must give a IV'); //OFB必须有向量 break; case 'cfb': $this->mode = MCRYPT_MODE_CFB; if ($iv == 'off') die('CFB must give a IV'); //CFB必须有向量 break; case 'ecb': $this->mode = MCRYPT_MODE_ECB; $iv = 'off'; //ECB不需要向量 break; case 'cbc': default: $this->mode = MCRYPT_MODE_CBC; } switch (strtolower($iv)){ case "off": $this->iv = null; break; case "auto": $source = PHP_OS=='WINNT' ? MCRYPT_RAND : MCRYPT_DEV_RANDOM; $this->iv = mcrypt_create_iv(mcrypt_get_block_size($this->mcrypt, $this->mode), $source); break; default: $this->iv = $iv; } } /** * 获取向量值 * @param string 向量值编码（base64/hex/bin） * @return string 向量值 */ public function getIV($code = 'base64'){ switch ($code){ case 'base64': $ret = base64_encode($this->iv); break; case 'hex': $ret = bin2hex($this->iv); break; case 'bin': default: $ret = $this->iv; } return $ret; } /** * 加密 * @param string 明文 * @param string 密文编码（base64/hex/bin） * @return string 密文 */ public function encrypt($str, $code = 'base64'){ if ($this->mcrypt == MCRYPT_DES) $str = $this->_pkcs5Pad($str); if (isset($this->iv)) { $result = mcrypt_encrypt($this->mcrypt, $this->key, $str, $this->mode, $this->iv); } else { @$result = mcrypt_encrypt($this->mcrypt, $this->key, $str, $this->mode); } switch ($code){ case 'base64': $ret = base64_encode($result); break; case 'hex': $ret = bin2hex($result); break; case 'bin': default: $ret = $result; } return $ret; } /** * 解密 * @param string 密文 * @param string 密文编码（base64/hex/bin） * @return string 明文 */ public function decrypt($str, $code = "base64"){ $ret = false; switch ($code){ case 'base64': $str = base64_decode($str); break; case 'hex': $str = $this->_hex2bin($str); break; case 'bin': default: } if ($str !== false){ if (isset($this->iv)) { $ret = mcrypt_decrypt($this->mcrypt, $this->key, $str, $this->mode, $this->iv); } else { @$ret = mcrypt_decrypt($this->mcrypt, $this->key, $str, $this->mode); } if ($this->mcrypt == MCRYPT_DES) $ret = $this->_pkcs5Unpad($ret); } return $ret; } private function _pkcs5Pad($text){ $this->blocksize = mcrypt_get_block_size($this->mcrypt, $this->mode); $pad = $this->blocksize - (strlen($text) % $this->blocksize); return $text . str_repeat(chr($pad), $pad); } private function _pkcs5Unpad($text){ $pad = ord($text{strlen($text) - 1}); if ($pad > strlen($text)) return false; if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false; $ret = substr($text, 0, -1 * $pad); return $ret; } private function _hex2bin($hex = false){ $ret = $hex !== false && preg_match('/^[0-9a-fA-F]+$/i', $hex) ? pack("H*", $hex) : false; return $ret; } } |
给个小demo，方便学习
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | <?php header('Content-Type:text/html;Charset=utf-8;'); include "Xcrypt.class.php"; $a = isset($_GET['a']) ? $_GET['a'] : '测试123'; //密钥 $key1 = '12345678123456781234567812345678'; //256 bit $key = '1234567812345678'; //128 bit $key = '12345678'; //64 bit //设置模式和IV $m = new Xcrypt($key, 'cbc', 'auto'); //获取向量值 echo '向量：'; var_dump($m->getIV('base64')); //加密 $b = $m->encrypt($a, 'base64'); var_dump($b); //解密 $c = $m->decrypt($b, 'base64'); var_dump($c); |
