php RAS加密類代碼

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通過openssl實現的簽名、驗簽、非對稱加解密,需要配合x.509認證(如crt和pem)檔案使用。
 

<?php /** * RSA演算法類 * 簽名及密文編碼:base64字串/十六進位字串/二進位字串流 * 填充方式: PKCS1Padding(加解密)/NOPadding(解密) * * Notice:Only accepts a single block. Block size is equal to the RSA key size!  * 如密鑰長度為1024 bit,則加密時資料需小於128位元組,加上PKCS1Padding本身的11位元組資訊,所以明文需小於117位元組 * * @author: linvo * @version: 1.0.0 * @date: 2013/1/23 */ class RSA{        private $pubKey = null;     private $priKey = null;        /**     * 自訂錯誤處理     */     private function _error($msg){         die(‘RSA Error:‘ . $msg); //TODO     }        /**     * 建構函式     *     * @param string 公開金鑰檔案(驗簽和加密時傳入)     * @param string 私密金鑰檔案(簽名和解密時傳入)     */     public function __construct($public_key_file = ‘‘, $private_key_file = ‘‘){         if ($public_key_file){             $this->_getPublicKey($public_key_file);         }         if ($private_key_file){             $this->_getPrivateKey($private_key_file);         }     }           /**     * 產生簽名     *     * @param string 簽名材料     * @param string 簽名編碼(base64/hex/bin)     * @return 簽名值     */     public function sign($data, $code = ‘base64‘){         $ret = false;         if (openssl_sign($data, $ret, $this->priKey)){             $ret = $this->_encode($ret, $code);         }         return $ret;     }        /**     * 驗證簽名     *     * @param string 簽名材料     * @param string 簽名值     * @param string 簽名編碼(base64/hex/bin)     * @return bool      */     public function verify($data, $sign, $code = ‘base64‘){         $ret = false;             $sign = $this->_decode($sign, $code);         if ($sign !== false) {             switch (openssl_verify($data, $sign, $this->pubKey)){                 case 1: $ret = true; break;                     case 0:                     case -1:                      default: $ret = false;                  }         }         return $ret;     }        /**     * 加密     *     * @param string 明文     * @param string 密文編碼(base64/hex/bin)     * @param int 填充方式(貌似php有bug,所以目前僅支援OPENSSL_PKCS1_PADDING)     * @return string 密文     */     public function encrypt($data, $code = ‘base64‘, $padding = OPENSSL_PKCS1_PADDING){         $ret = false;             if (!$this->_checkPadding($padding, ‘en‘)) $this->_error(‘padding error‘);         if (openssl_public_encrypt($data, $result, $this->pubKey, $padding)){             $ret = $this->_encode($result, $code);         }         return $ret;     }        /**     * 解密     *     * @param string 密文     * @param string 密文編碼(base64/hex/bin)     * @param int 填充方式(OPENSSL_PKCS1_PADDING / OPENSSL_NO_PADDING)     * @param bool 是否翻轉明文(When passing Microsoft CryptoAPI-generated RSA cyphertext, revert the bytes in the block)     * @return string 明文     */     public function decrypt($data, $code = ‘base64‘, $padding = OPENSSL_PKCS1_PADDING, $rev = false){         $ret = false;         $data = $this->_decode($data, $code);         if (!$this->_checkPadding($padding, ‘de‘)) $this->_error(‘padding error‘);         if ($data !== false){             if (openssl_private_decrypt($data, $result, $this->priKey, $padding)){                 $ret = $rev ? rtrim(strrev($result), "\0") : ‘‘.$result;             }          }         return $ret;     }           // 私人方法        /**     * 檢測填滿類型     * 加密只支援PKCS1_PADDING     * 解密支援PKCS1_PADDING和NO_PADDING     *      * @param int 填充模式     * @param string 加密en/解密de     * @return bool     */     private function _checkPadding($padding, $type){         if ($type == ‘en‘){             switch ($padding){                 case OPENSSL_PKCS1_PADDING:                     $ret = true;                     break;                 default:                     $ret = false;             }         } else {             switch ($padding){                 case OPENSSL_PKCS1_PADDING:                 case OPENSSL_NO_PADDING:                     $ret = true;                     break;                 default:                     $ret = false;             }         }         return $ret;     }        private function _encode($data, $code){         switch (strtolower($code)){             case ‘base64‘:                 $data = base64_encode(‘‘.$data);                 break;             case ‘hex‘:                 $data = bin2hex($data);                 break;             case ‘bin‘:             default:         }         return $data;     }        private function _decode($data, $code){         switch (strtolower($code)){             case ‘base64‘:                 $data = base64_decode($data);                 break;             case ‘hex‘:                 $data = $this->_hex2bin($data);                 break;             case ‘bin‘:             default:         }         return $data;     }        private function _getPublicKey($file){         $key_content = $this->_readFile($file);         if ($key_content){             $this->pubKey = openssl_get_publickey($key_content);         }     }        private function _getPrivateKey($file){         $key_content = $this->_readFile($file);         if ($key_content){             $this->priKey = openssl_get_privatekey($key_content);         }     }        private function _readFile($file){         $ret = false;         if (!file_exists($file)){             $this->_error("The file {$file} is not exists");         } else {             $ret = file_get_contents($file);         }         return $ret;     }           private function _hex2bin($hex = false){         $ret = $hex !== false && preg_match(‘/^[0-9a-fA-F]+$/i‘, $hex) ? pack("H*", $hex) : false;             return $ret;     }          }  


測試樣本

<?php header(‘Content-Type:text/html;Charset=utf-8;‘);    include "rsa.php";    echo ‘<pre>‘; $a = isset($_GET[‘a‘]) ? $_GET[‘a‘] : ‘測試123‘; ////////////////////////////////////// $pubfile = ‘E:\ssl\cert\pwd.crt‘; $prifile = ‘E:\ssl\cert\pwd.pem‘;    $m = new RSA($pubfile, $prifile); $x = $m->sign($a); $y = $m->verify($a, $x); var_dump($x, $y);       $x = $m->encrypt($a); $y = $m->decrypt($x); var_dump($x, $y);  

php RAS加密類代碼

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