php 非对称加密解密类

<?php
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/*本文oppenssl地方需结合上篇文章

生成公钥、私钥对，私钥加密的内容能通过公钥解密（反过来亦可以）

下载开源RSA密钥生成工具openssl（通常Linux系统都自带该程序），解压缩至独立的文件夹，进入其中的bin目录，执行以下命令：

openssl genrsa -out rsa_private_key.pem 1024 #生成原始 RSA私钥文件 rsa_private_key.pem
openssl pkcs8 -topk8 -inform PEM -in rsa_private_key.pem -outform PEM -nocrypt -out private_key.pem #将原始 RSA私钥转换为 pkcs8格式
openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem #通过私钥生成对应 RSA公钥 rsa_public_key.pem

*/
$private_key = ‘-----BEGIN PRIVATE KEY-----
MIICeAIBADANBgkqhkiG9w0BAQEFAASCAmIwggJeAgEAAoGBAMJZKm/28UWvNtIP
PiDx6VgmM8wE5CnPl/SqUH6HkDptTBAxSj7GuZ+/5Ci6X32MOBaBvQi0s9bbuEj3
R8soTMSUTUF7aMLLMCjGRYRtsZms85buCaZzu85AStHYAcN73CyW9jg5KuCXHwZo
314KDQEKCi8sENigOc5iRg+hxZSnAgMBAAECgYEAj9xxDXA+KNcKPXQLCVgI4rdk
oCD+w/RnBzULYJ34pUdChrn1u4Je5WGmAn/zL3wcCI0A4PDiLql2QIzLGBc8uvsW
ZG5P0jrvneueTj6lYGKvavGmHlWxLEmVbu4Q7UZylaFWmvym7ugi4pC2SA2tb/bh
PQgGOk0hGblf35IFbAECQQD3H+CuD8OHQoE5dKKqYKgoZJbVrrVooHpgXNkX83dV
ikuDjhec52S1tP1gebmc9k4+gKkwlVAQ1yAspMTtmWJ1AkEAyVQNBSKenhe9W91p
Ck4T7H8OGveQeXaBKIharHfc6bKo6EgP9cCNXO4IFcZwu39oTXkJ0T++KDui7LbG
Y0J/KwJAbH4OQdyh1uwXl4XhNDOjH7ipj75X3ks17sBUfvNgXKmOZX8oVrYvvKZs
5sIJ/yMTTtVlcfLbZ8lKUs8ztaw1UQJBALGWi3mZJRNM24J6Fpq5boexN28AKxeJ
ObrYNCtn+5zFNIrYbgOX2to7OTSD+5LYetfDya4jLQhuOnPVcb/Cu0sCQQDjMihu
Ei11tbheQN6U/nQkWpg5XpRY2Cfh/wbHA1TWr/eTz31LOzAfdgdSaKMHU3BZCqwx
4H30DRqxM/D+COWn
-----END PRIVATE KEY-----‘;
$public_key = ‘-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCWSpv9vFFrzbSDz4g8elYJjPM
BOQpz5f0qlB+h5A6bUwQMUo+xrmfv+Qoul99jDgWgb0ItLPW27hI90fLKEzElE1B
e2jCyzAoxkWEbbGZrPOW7gmmc7vOQErR2AHDe9wslvY4OSrglx8GaN9eCg0BCgov
LBDYoDnOYkYPocWUpwIDAQAB
-----END PUBLIC KEY-----‘;
file_put_contents(‘public_key.txt‘, $public_key);
file_put_contents(‘private_key.txt‘, $private_key);

/**
* rsa 非对称加解密
*/
class rsa {
???private $public_key = ‘‘; //公密钥
???private $private_key = ‘‘; //私密钥
???private $public_key_resource = ‘‘; //公密钥资源
???private $private_key_resource = ‘‘; //私密钥资源
???/**
????* 架构函数
????* @param [string] $public_key_file ?[公密钥文件地址]
????* @param [string] $private_key_file [私密钥文件地址]
????*/
???public function __construct($public_key_file,$private_key_file) {
???????try {
???????????if(!file_exists($public_key_file) || !file_exists($private_key_file)) {
???????????????throw new Exception(‘key file no exists‘);
???????????}
???????????if (false == ($this->public_key = file_get_contents($public_key_file)) || false == ($this->private_key = file_get_contents($private_key_file))) {
???????????????throw new Exception(‘read key file fail‘);
???????????}
???????????if(false == ($this->public_key_resource = $this->is_bad_public_key($this->public_key)) || false == ($this->private_key_resource = $this->is_bad_private_key($this->private_key))) {
???????????????throw new Exception(‘public key or private key no usable‘);
???????????}

???????} catch (Exception $e) {
???????????die($e->getMessage());
???????} ???
???}
???private function is_bad_public_key($public_key) {
???????return openssl_pkey_get_public($public_key);
???}
???private function is_bad_private_key($private_key) {
???????return openssl_pkey_get_private($private_key);
???}
???/**
????* 生成一对公私密钥 成功返回 公私密钥数组 失败 返回 false
????*/
???public function create_key() {
???????$res = openssl_pkey_new();
???????if($res == false) return false;
???????openssl_pkey_export($res, $private_key);
???????$public_key = openssl_pkey_get_details($res);
???????return array(‘public_key‘=>$public_key["key"],‘private_key‘=>$private_key);
???}
???/**
????* 用私密钥加密
????*/
???public function private_encrypt($input) {
???????openssl_private_encrypt($input,$output,$this->private_key_resource);
???????return base64_encode($output);
???}
???/**
????* 解密 私密钥加密后的密文
????*/
???public function public_decrypt($input) {
???????openssl_public_decrypt(base64_decode($input),$output,$this->public_key_resource);
???????return $output;
???}
???/**
????* 用公密钥加密
????*/
???public function public_encrypt($input) {
???????openssl_public_encrypt($input,$output,$this->public_key_resource);
???????return base64_encode($output);
???}
???/**
????* 解密 公密钥加密后的密文
????*/
???public function private_decrypt($input) {
???????openssl_private_decrypt(base64_decode($input),$output,$this->private_key_resource);
???????return $output;
???}
}

$time = time();
echo ‘时间戳==‘.$time.‘<br>‘;
$rsa = new rsa(‘public_key.txt‘,‘private_key.txt‘);
$str = ‘撇如惊鸿 矫若游龙&‘.$time;
$str = $rsa->public_encrypt($str); //用公密钥加密
echo ‘公秘钥加密==‘.$str.‘</br>‘;
$str = $rsa->private_decrypt($str); //用私密钥解密
echo ‘私秘钥解密==‘.$str.‘</br>‘;
//=============================================================
$str = $rsa->private_encrypt($str); //用丝密钥加密
echo ‘私密钥加密==‘.$str.‘</br>‘;
$str = $rsa->public_decrypt($str); //用公密钥解密
echo ‘公密钥解密==‘.$str.‘</br>‘;