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。以下是小编为大家搜索整理的PHP实现RSA加密类的'实例解析，希望能给大家带来帮助，更多精彩内容请及时关注我们应届毕业生考试网!
/**
* 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), "") : ''.$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：
header('Content-Type:text/html;Charset=utf-8;');
include "";
echo '
$a = isset($_GET['a']) ? $_GET['a'] : '测试123';
//////////////////////////////////////
$pubfile = 'E:';$prifile = 'E:';$m = new RSA($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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