php實(shí)現(xiàn)RSA加密類實(shí)例_PHP教程
Jul 13, 2016 am 10:00 AMphp實(shí)現(xiàn)RSA加密類實(shí)例
?這篇文章主要介紹了php實(shí)現(xiàn)RSA加密類,實(shí)例分析了php自定義RSA類實(shí)現(xiàn)加密與解密的技巧,非常具有實(shí)用價(jià)值,需要的朋友可以參考下
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本文實(shí)例講述了php實(shí)現(xiàn)RSA加密類。分享給大家供大家參考。具體分析如下:
通過(guò)openssl實(shí)現(xiàn)的簽名、驗(yàn)簽、非對(duì)稱加解密,需要配合x.509證書(如crt和pem)文件使用。
由于各種原因,該類并不十分完善,歡迎各種測(cè)試!
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/** * RSA算法類 * 簽名及密文編碼:base64字符串/十六進(jìn)制字符串/二進(jìn)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! * 如密鑰長(zhǎng)度為1024 bit,則加密時(shí)數(shù)據(jù)需小于128字節(jié),加上PKCS1Padding本身的11字節(jié)信息,所以明文需小于117字節(jié) * * @author: linvo * @version: 1.0.0 * @date: 2013/1/23 */ class RSA{ private $pubKey = null; private $priKey = null; /** * 自定義錯(cuò)誤處理 */ private function _error($msg){ die('RSA Error:' . $msg); //TODO } /** * 構(gòu)造函數(shù) * * @param string 公鑰文件(驗(yàn)簽和加密時(shí)傳入) * @param string 私鑰文件(簽名和解密時(shí)傳入) */ public function __construct($public_key_file = '', $private_key_file = ''){ if ($public_key_file){ $this->_getPublicKey($public_key_file); } if ($private_key_file){ $this->_getPrivateKey($private_key_file); } } /** * 生成簽名 * * @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 $ret; } /** * 驗(yàn)證簽名 * * @param string 簽名材料 * @param string 簽名值 * @param string 簽名編碼(base64/hex/bin) * @return bool */ public function verify($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 $ret; } /** * 解密 * * @param string 密文 * @param string 密文編碼(base64/hex/bin) * @param int 填充方式(OPENSSL_PKCS1_PADDING / OPENSSL_NO_PADDING) * @param bool 是否翻轉(zhuǎn)明文(When passing Microsoft CryptoAPI-generated RSA cyphertext, revert the bytes in the block) * @return string 明文 */ public function decrypt($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 $ret; } // 私有方法 /** * 檢測(cè)填充類型 * 加密只支持PKCS1_PADDING * 解密支持PKCS1_PADDING和NO_PADDING * * @param int 填充模式 * @param string 加密en/解密de * @return bool */ private function _checkPadding($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 $ret; } } |
測(cè)試demo:
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header('Content-Type:text/html;Charset=utf-8;'); include "rsa.php"; echo ' '; <p>$a = isset($_GET['a']) ? $_GET['a'] : '測(cè)試123';</p> <p>//////////////////////////////////////</p> <p>$pubfile = 'E:\ssl\cert\pwd.crt';</p> <p>$prifile = 'E:\ssl\cert\pwd.pem';</p> <p>$m = new RSA($pubfile, $prifile);</p> <p>$x = $m->sign($a);</p> <p>$y = $m->verify($a, $x);</p> <p>var_dump($x, $y);</p> <p>$x = $m->encrypt($a);</p> <p>$y = $m->decrypt($x);</p> <p>var_dump($x, $y);</p> |
希望本文所述對(duì)大家的php程序設(shè)計(jì)有所幫助。

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