本文实例讲述了PHP实现RSA加密类。分享给大家供大家参考。具体分析如下:
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。 由于各种原因,该类并不十分完善,欢迎各种测试!
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_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($data,$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,$padding = OPENSSL_PKCS1_PADDING,$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($data,$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demo:
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PHP
header('Content-Type:text/html;Charset=utf-8;');
include "rsa.PHP";
echo '
'; $a = isset($_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);
希望本文所述对大家的PHP程序设计有所帮助。
原文链接:https://www.f2er.com/php/22276.html