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xm52
9年前发布

php RAS加密类代码

通过openssl实现的签名、验签、非对称加解密,需要配合x.509证书(如crt和pem)文件使用。
 

<?php   /**   * RSA算法类   * 签名及密文编码:base64字符串/十六进制字符串/二进制字符串流   * 填充方式: PKCS1Padding(加解密)/NOPadding(解密)   *   * Notice:Only accepts a single block. Block size is equal to the RSA key size!    * 如密钥长度为1024 bit,则加密时数据需小于128字节,加上PKCS1Padding本身的11字节信息,所以明文需小于117字节   *   * @author: linvo   * @version: 1.0.0   * @date: 2013/1/23   */   class RSA{            private $pubKey = null;       private $priKey = null;            /**       * 自定义错误处理       */       private function _error($msg){           die('RSA Error:' . $msg); //TODO       }            /**       * 构造函数       *       * @param string 公钥文件(验签和加密时传入)       * @param string 私钥文件(签名和解密时传入)       */       public function __construct($public_key_file = '', $private_key_file = ''){           if ($public_key_file){               $this->_getPublicKey($public_key_file);           }           if ($private_key_file){               $this->_getPrivateKey($private_key_file);           }       }                 /**       * 生成签名       *       * @param string 签名材料       * @param string 签名编码(base64/hex/bin)       * @return 签名值       */       public function sign($data, $code = 'base64'){           $ret = false;           if (openssl_sign($data, $ret, $this->priKey)){               $ret = $this->_encode($ret, $code);           }           return $ret;       }            /**       * 验证签名       *       * @param string 签名材料       * @param string 签名值       * @param string 签名编码(base64/hex/bin)       * @return bool        */       public function verify($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 $ret;       }            /**       * 加密       *       * @param string 明文       * @param string 密文编码(base64/hex/bin)       * @param int 填充方式(貌似php有bug,所以目前仅支持OPENSSL_PKCS1_PADDING)       * @return string 密文       */       public function encrypt($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 $ret;       }            /**       * 解密       *       * @param string 密文       * @param string 密文编码(base64/hex/bin)       * @param int 填充方式(OPENSSL_PKCS1_PADDING / OPENSSL_NO_PADDING)       * @param bool 是否翻转明文(When passing Microsoft CryptoAPI-generated RSA cyphertext, revert the bytes in the block)       * @return string 明文       */       public function decrypt($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 $ret;       }                 // 私有方法            /**       * 检测填充类型       * 加密只支持PKCS1_PADDING       * 解密支持PKCS1_PADDING和NO_PADDING       *        * @param int 填充模式       * @param string 加密en/解密de       * @return bool       */       private function _checkPadding($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;       }                  }  

测试示例
<?php   header('Content-Type:text/html;Charset=utf-8;');        include "rsa.php";        echo '<pre>';   $a = isset($_GET['a']) ? $_GET['a'] : '测试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);