<?php /*** DES加密類** 本類用于實現des算法的加密及解密** 調用方法* $des = new DES('key值'); // key只能是八位* $xx = $des->decrypt('xxxxx'); // 解密* $aa = $des->encrypt('xxxaa'); // 加密*/ class CI_Des {public $key='';//key長度8例如:1234abcdfunction __construct($params) {$key = empty($params[0]) ? '': $params[0];$this->key = $key;}function encrypt($encrypt) {$encrypt = $this->pkcs5_pad($encrypt);$passcrypt = @mcrypt_encrypt(MCRYPT_DES, $this->key, $encrypt, MCRYPT_MODE_CBC);return strtoupper(bin2hex($passcrypt));}function decrypt($decrypt) {$decoded = pack("H*", $decrypt);$decrypted = @mcrypt_decrypt(MCRYPT_DES, $this->key, $decoded, MCRYPT_MODE_CBC);return $this->pkcs5_unpad($decrypted);}function pkcs5_unpad($text) {$pad = ord($text{strlen($text)-1}); if ($pad > strlen($text)) {return $text;}if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) {return $text;}return substr($text, 0, -1 * $pad);}function pkcs5_pad($text) {$len = strlen($text);$mod = $len % 8;$pad = 8 - $mod;return $text.str_repeat(chr($pad),$pad);}//截中文英文子串function msubstr($str, $start, $len) {$tmpstr = "";$strlen = $start + $len;for($i = 0; $i < $strlen; $i++) {if(ord(substr($str, $i, 1)) > 0xa0) {$tmpstr .= substr($str, $i, 2);$i++;} else$tmpstr .= substr($str, $i, 1);}return $tmpstr;} }

?

總結

以上是生活随笔為你收集整理的PHP中的des加密类的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。