PHP實現RSA加密類的實例解析
通過openssl實現的簽名、驗簽、非對稱加解密，需要配合x.509證書(如crt和pem)文件使用。以下是小編為大家搜索整理的PHP實現RSA加密類的實例解析，希望能給大家帶來幫助，更多精彩內容請及時關注我們應屆畢業生考試網!
/**
* RSA算法類
* 簽名及密文編碼：base64字符串/十六進制字符串/二進制字符串流
* 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!
* 如密鑰長度為1024 bit，則加密時數據需小于128字節，加上PKCS1Padding本身的11字節信息，所以明文需小于117字節
*
* @author: linvo
* @version: 1.0.0
* @date: 2013/1/23
*/
class RSA{
private $pubKey = null;
private $priKey = null;
/**
* 自定義錯誤處理
*/
private function _error($msg){
die('RSA Error:' . $msg); /pic/p>
}
/**
* 構造函數
*
* @param string 公鑰文件(驗簽和加密時傳入)
* @param string 私鑰文件(簽名和解密時傳入)
*/
public function __construct($public_key_file = '', $private_key_file = ''){
if ($public_key_file){
$this->_getPublicKey($public_key_file);
}
if ($private_key_file){
$this->_getPrivateKey($private_key_file);
}
}
/**
* 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), "") : ''.$result;
}
}
return $ret;
}
/pic/p>
/**
* 檢測填充類型
* 加密只支持PKCS1_PADDING
* 解密支持PKCS1_PADDING和NO_PADDING
*
* @param int 填充模式
* @param string 加密en/解密de
* @return bool
*/
private function _checkPadding($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;
}
}
測試demo：
header('Content-Type:text/html;Charset=utf-8;');
include "rsa.php";
echo '
$a = isset($_GET['a']) ? $_GET['a'] : '測試123';
/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/pic/p>
$pubfile = 'E:sslcertpwd.crt';$prifile = 'E:sslcertpwd.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);
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