本文實例講述了PHP實現的DES加密解密封裝類。分享給大家供大家參考，具體如下：
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<?php/*** PHP版DES加解密類* 可與java的DES(DESede/CBC/PKCS5Padding)加密方式兼容**/class CryptDes { var $key; var $iv; function CryptDes($key, $iv){ $this->key = $key; $this->iv = $iv; } function encrypt($input){ $size = mcrypt_get_block_size(MCRYPT_DES,MCRYPT_MODE_CBC); //3DES加密將MCRYPT_DES改為MCRYPT_3DES $input = $this->pkcs5_pad($input, $size); //如果采用PaddingPKCS7，請更換成PaddingPKCS7方法。 $key = str_pad($this->key,8,'0'); //3DES加密將8改為24 $td = mcrypt_module_open(MCRYPT_DES, '', MCRYPT_MODE_CBC, ''); if( $this->iv == '' ) { $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND); } else { $iv = $this->iv; } @mcrypt_generic_init($td, $key, $iv); $data = mcrypt_generic($td, $input); mcrypt_generic_deinit($td); mcrypt_module_close($td); $data = base64_encode($data);//如需轉換二進制可改成 bin2hex 轉換 return $data; } function decrypt($encrypted){ $encrypted = base64_decode($encrypted); //如需轉換二進制可改成 bin2hex 轉換 $key = str_pad($this->key,8,'0'); //3DES加密將8改為24 $td = mcrypt_module_open(MCRYPT_DES,'',MCRYPT_MODE_CBC,'');//3DES加密將MCRYPT_DES改為MCRYPT_3DES if( $this->iv == '' ) { $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND); } else { $iv = $this->iv; } $ks = mcrypt_enc_get_key_size($td); @mcrypt_generic_init($td, $key, $iv); $decrypted = mdecrypt_generic($td, $encrypted); mcrypt_generic_deinit($td); mcrypt_module_close($td); $y=$this->pkcs5_unpad($decrypted); return $y; } function pkcs5_pad ($text, $blocksize) { $pad = $blocksize - (strlen($text) % $blocksize); return $text . str_repeat(chr($pad), $pad); } function pkcs5_unpad($text){ $pad = ord($text{strlen($text)-1}); if ($pad > strlen($text)) { return false; } if (strspn($text, chr($pad), strlen($text) - $pad) != $pad){ return false; } return substr($text, 0, -1 * $pad); } function PaddingPKCS7($data) { $block_size = mcrypt_get_block_size(MCRYPT_DES, MCRYPT_MODE_CBC);//3DES加密將MCRYPT_DES改為MCRYPT_3DES $padding_char = $block_size - (strlen($data) % $block_size); $data .= str_repeat(chr($padding_char),$padding_char); return $data; }}$des = new CryptDes("12345678","12345678");//（秘鑰向量，混淆向量）echo $ret = $des->encrypt("1111");//加密字符串?> |
希望本文所述對大家PHP程序設計有所幫助。
