rsatitle

rsa的js加密和php解密
群里的同志需要的前端js加密，后端php解密的实例

开始说明

后面有一个实例

javascript加密

引入相关的js库

jsbn.js ,

prng4.js ,

rng4.js ,

rsa.js ,

base64.js

他们的远程目录为： http://www-cs-students.stanford.edu/~tjw/jsbn/

前端代码：

<script src="http://www-cs-students.stanford.edu/~tjw/jsbn/jsbn.js"></script>
<script src="http://www-cs-students.stanford.edu/~tjw/jsbn/prng4.js"></script>
<script src="http://www-cs-students.stanford.edu/~tjw/jsbn/rng.js"></script>
<script src="http://www-cs-students.stanford.edu/~tjw/jsbn/rsa.js"></script>
<script src="http://www-cs-students.stanford.edu/~tjw/jsbn/base64.js"></script>

本 blog 也拷贝了这几个库，网址的目录为： http://blog.lopy.win/assets/rsa/ ，将几个文件名加在后面就可以了。

github地址：https://github.com/uljjmhn520/uljjmhn520.github.io/tree/master/assets/rsa

<!-- jquery 方便dom操作 -->
<script src="//cdn.bootcss.com/jquery/2.1.3/jquery.min.js"></script>

<!-- 本blog的js文件 -->
<script src="http://blog.lopy.win/assets/rsa/jsbn.js"></script>
<script src="http://blog.lopy.win/assets/rsa/prng4.js"></script>
<script src="http://blog.lopy.win/assets/rsa/rng.js"></script>
<script src="http://blog.lopy.win/assets/rsa/rsa.js"></script>
<script src="http://blog.lopy.win/assets/rsa/base64.js"></script>

test —————–

test —————– end

js代码第一部分

//创建一个rsa类，只有一个加密方法，构造函数为公钥中的 n 和 e 也就是模和指数。
var MyRsa = function(module,eVal){
    module = module || '';
    eVal = eVal || '010001';
    var rsaObj = new RSAKey();

    //构造函数
    var init = function(module,eVal){
        if(module){
            rsaObj.setPublic(module,eVal);
        }
    };
    init(key,eVal);

    //加密
    this.encrypt = function(str){
        var strEncoded = rsaObj.encrypt(str);
        if(!strEncoded){
            alert('hello what\'s your name');
            return false;
        }
        return hex2b64(strEncoded);
    }
}

js代码第二部分

//n和e为rsa的模和指数，他们的值是从密钥对中获得的，后文会给出php 中获取的方法

var n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
var e = '010001';

var myRsa = new MyRsa(n,e);
var encoded = myRsa.encrypt('hello world');
console.log(encoded);

// result，以下为结果之一，每次加密的结果都可能不一样

// XJJeZhc4tYp50OXDAyBS6aK0lWOPNR6IVOM4auccxb+uk0+d5GewFq9ffAWhlBpAiRTuo1IbKm8e23UdU3kbIFs9nNAMCSdj/2FL3C9NrXlW67Jfs6azAMHMHKW3f3rXPCRMTvFGq09KdobwLiy71GidRZtbQYQEaZ8QhHpZC/QYem9EAdu4ULdBX5e1uigIPm3ukzK6RUKRbBYM44ApoL6kNUdbELvC2J6psqs1YxprwAw9D5C8N41tWFRwx7MIPx83TG8aGYDCU/q1E5Xd7fDpXlm4gZxPPXMHwIT4WJBvzDZoCCpxJSEYEzHzfF6HTTWcWo8BBbUeC8qssCHiyA==

php解密

私钥

解密用的私钥，与加密用的公钥为一对。

密钥对用php函数 openssl_pkey_new 和 openssl_pkey_export 生成；公钥可用已存在的私钥生成，后文中会介绍

以下为某一个私钥

-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----

php代码部分

// 上文中的私钥
$privateStr = '<<<privateKey'
xxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxx
privateKey;

$pKey = openssl_pkey_get_private($privateStr);

//encoded 为 上文js加密后的密文
$encoded = base64_decode($encoded);

//解密
openssl_private_decrypt($encoded,$decrypted,$pKey,OPENSSL_PKCS1_PADDING);

echo $decrypted;
//如果一切正常的话，就能解密出结果 hello world

一些说明

官方说明

php的openssl 扩展官网 点击进入

创建密钥对

$ssl = openssl_pkey_new([]);

提取私钥

openssl_pkey_export($res, $privKey);


echo $privKey;

//privKey 就为私钥 格式为 
// -----BEGIN PRIVATE KEY-----
// xxxxxxxxxx
// xxxxxxxxxx
// xxxxxxxxxx
// xxxxxxxxxx
// -----END PRIVATE KEY-----

获取detail，包括公钥、模、指数等信息

方式一，从密钥对里面提取

//获取detail
$detail = openssl_pkey_get_details($ssl);

//公钥
$publicKey = $detail['key'];

//模，值为二进制乱码，转为16进制
$module = $detail['rsa']['n'];
$module = bin2hex($module);

//指数，值为二进制乱码，转为16进制
$exponent = $detail['rsa']['e'];
$exponent = bin2hex($exponent); //一般结果为 010001 （65537）

方式二，从私钥里提取

//获取detail
$privateKeySource = openssl_get_privatekey($privKey);
$detail = openssl_pkey_get_details($privateKeySource);

//后面取模、指数等信息同 方式一

方式三，从公钥里提取

//$publicKey 为方式一中提取的 publicKey 
$publicKeySource = openssl_get_publickey($publicKey);
$publicKeyDetail = openssl_pkey_get_details($publicKeySource);

//后面取模、指数等信息同方式一
//从公钥里面提取的 detail 的内容较少

解密

// $encoded 为已被加密的密文
$encoded = base64_decode($encoded);

//私钥
$pKey = openssl_pkey_get_private($privKey);

//私钥解密
openssl_private_decrypt($encoded,$decoded,$pKey,OPENSSL_PKCS1_PADDING);

echo $decoded;

完整的实例

说明

以下内容基于 phalcon 的 controller ，如果你没有使用phalcon，可能会修改一部分代码

controller里面有三个action

index：html 页面，包括js加密部分

decode：php 解密部分，接收post数据，与页面index 的ajax交互

create：展示了创建密钥对

<?php
/**
    * @brief
    * Created by PhpStorm.
    * User: zy&cs
    * Date: 17-3-2
    * Time: 上午11:47
    */
namespace App\Modules\Tester\Controllers;

class RsaController extends ControllerBase
{

    /**
    * 内置了几个私钥，用该方法获取一个，
    *
    * 可以自己用 createAction 自己往后面加，实际操作中用缓存或数据库就能解决了
    *
    *
    * @param bool|int $key 默认取第一个，$key === false 时，取所有
    * @return array
    */
    private function rsaPrivateKey($key=false)
    {
        $rsaKeys = [];

        $rsaKeys[0] = <<<rsakey
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
rsakey;

        $rsaKeys[1] = <<<rsakey
-----BEGIN PRIVATE KEY-----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Ga/EXZWqau7eMuob1lz9MyxQMYtiNKRBpGrJyo9HoFjS1M4xVGyVq0C6V3SplMB4
vjjY7Snq6YKVk8Rw770Tnus=
-----END PRIVATE KEY-----
rsakey;

        $rsaKeys[2] = <<<rsakey
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
rsakey;

        $rsaKeys[3] = <<<rsakey
-----BEGIN PRIVATE KEY-----
MIIBUwIBADANBgkqhkiG9w0BAQEFAASCAT0wggE5AgEAAkEA0ZJCQOOdXAGtSN1W
MBNQp27kzLC7qE275nNgJsxk7VN2okNDPoTyn2jKO66VSy6j2Jgnsa2Ivd8w0kZQ
s96viwIDAQABAkANFdDFNHES2Zf0QL2s6sfSbH4kubQ94fyleva59XEn0D1RtQou
ELkG8ziIYbqucTMJm5IkyR7wFYDCDuGgDU6BAiEA9hRhdeQfdwLzNUQfrReNEScL
LhDMGbDqVsEvu8ik8zsCIQDaBRndLKubqbTtE/HP6tFG8bNHLpCfRbv+YTBgbyvP
8QIgfdbKSClSVd/yU2j08eU7RGw88V+xn+myzI6aRGNExwUCIHBIIEHgN6E7jYpr
syW5cX5wDDykpqbgaylfNGL13kKBAiAZwTtHJmMuApSOrdesqoeNMOqKhoDgyNZy
GbnWQa+Dxg==
-----END PRIVATE KEY-----
rsakey;

        $rsaKeys[4] = <<<rsakey
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
rsakey;

        $rsaKeys[5] = <<<rsakey
-----BEGIN PRIVATE KEY-----
MIIBFAIBADANBgkqhkiG9w0BAQEFAASB/zCB/AIBAAIzAVKoys24WgfliPeAh2LH
vhFEQ1KmxEETTrOwjSLtYFgA6opEvcND4Hie61syD3i/g7sBAgMBAAECMwDfbilP
DH+pkhCJaizoSOvnLGhWUVxNqtVSKTXJX/Nri/a5Ye3sr+ZZIaCcxZCeBOejIQIa
AbPKiMN2IzV+WpDMr9zspM1Khz2Hy3y0hKUCGgDG8O8syaInZ7/qdrn2/1TIuZkO
CkE4+KItAhlgyLtlBai+Kai9fegU3a2gNkwg2zbTJFhNAhkyNURnrUu7XjfVWLl+
WNpw/kZegMANPNLRAhoBgZPB6KHFUtqcodgnJvRkyt8wVlUk0Lx6Qg==
-----END PRIVATE KEY-----
rsakey;



        if($key === false){
            return $rsaKeys;
        }

        if (!isset($rsaKeys[$key])) {
            $key=0;
        }

        return $rsaKeys[$key];
    }

    /**
        * @param $id
        * @return array
        */
    private function getDetailFromPKId($id)
    {
        $key = $this->rsaPrivateKey($id);
        $resource = openssl_get_privatekey($key);
        return  openssl_pkey_get_details($resource);;
    }


    private function getHtml($keyId,$rsaModule,$rsaExponent)
    {

        //rsa 的那几个js
        $rsaAssets = [
            'jsbn.js',
            'prng4.js',
            'rng.js',
            'rsa.js',
            'base64.js',
        ];
        $rsaJsPre = 'http://blog.lopy.win/assets/rsa/';
        $rsaJs = '';
        foreach($rsaAssets as $val){
            $rsaJs .= '<script src="' . $rsaJsPre . $val . '"></script>';
        }


        //切换 privateKey
        $switchStr = '';
        foreach($this->rsaPrivateKey() as $key=>$val)
        {
            $switchStr .= '<li><a href="index?key_id=' . $key . '">密钥 - ' . $key . ' </a></li>';
        }


        //密钥长度
        $moduleLength = strlen($rsaModule) * 8 / 2; //为毛要除以2 ，因为 bin2hex 后，长度为两倍

        //html 代码
        $html = <<<html
<html>
<head>
<script src="//cdn.bootcss.com/jquery/2.1.3/jquery.min.js"></script>

$rsaJs

</head>
<body>
<script>
    //class rsa
    var MyRsa = function(key,eVal){
        key = key || '';
        eVal = eVal || '010001';
        var rsaObj = new RSAKey();

        var init = function(key,eVal){
            if(key){
                rsaObj.setPublic(key,eVal);
            }
        };

        this.encrypt = function(str){
            var strEncoded = rsaObj.encrypt(str);
            if(!strEncoded){
                alert('hello what\'s your name');
                return false;
            }
            return hex2b64(strEncoded);
        }
        init(key,eVal);
    }
    function submitCheck(){
        var rsaModule = "$rsaModule";
        var rsaExponent = "$rsaExponent";

        var myRsa = new MyRsa(rsaModule,rsaExponent);
        $("[name=input]").val(myRsa.encrypt($("#input").val()));
        var url = "decode";
        var data ={
            key_id:$("[name=key_id]").val(),
            input:$("[name=input]").val(),
        };
        $.post(url,data,function(json){
            if(json.flag ===0){
                $('#decoded').val(json.decoded);
            }else{
                alert(json.msg);
            }
        });
        return false;
    }
</script>
<style>
    input.full{
        width: 100%;
    }
</style>

<ul>$switchStr</ul>

<form action="#" method="post">
    <ul>
        <input type="hidden" name="key_id" value="$keyId">

        <li></li>
        <li>密钥长度</li>
        <li>
            <input type="text" readonly value="$moduleLength" class="full">
        </li>
        <li></li>
        <li>模（n）</li>
        <li>
            <input type="text" readonly value="$rsaModule" class="full">
        </li>
        <li></li>
        <li>指数（e）</li>
        <li>
            <input type="text" readonly value="$rsaExponent" class="full">
        </li>
        <li></li>
        <li>输入要加密的字符串：</li>
        <li>
            <input type="text" id="input" class="full">
        </li>
        <li></li>
        <li>js加密后</li>
        <li>
            <input type="text" name="input" readonly class="full">
        </li>

        <li></li>
        <li>php解密后</li>
        <li><input type="text" id="decoded" readonly class="full"></li>
        <li></li>
        <li>
            <button type="submit" onclick="return submitCheck();">encode && decode</button>
        </li>
    </ul>

</form>
</body>
</html>
html;
        return $html;
    }

    /**
     *
     * @return bool
     */
    public function indexAction()
    {
        $keyId = $this->request->get('key_id','int',0);
        $keyId = $keyId < 0 ? 0 : $keyId;

        //取一个私钥 private key
        $detail = $this->getDetailFromPKId($keyId);

        //取得该密钥对的 模 和指数，也是 n 和 e
        $rsaModule = strtoupper(bin2hex($detail['rsa']['n']));

        $rsaExponent = bin2hex($detail['rsa']['e']);

        //输出html
        echo $this->getHtml($keyId, $rsaModule, $rsaExponent);

        return false;
    }


    /**
     * @return bool
     */
    public function decodeAction()
    {
        //post 参数
        $keyId = $this->request->getPost('key_id', 'int', 0);
        $input = $this->request->getPost('input', ['string', 'trim'], '');
        $json = [
            'flag' => 1,
            'msg'  => ''
        ];


        if($keyId < 0){
            $json['msg'] = 'what\'s your name?';
        }else if(!$input){
            $json['msg'] = 'how old are you';
        }else{
            $str = base64_decode($input);

            //私钥
            $pKey = openssl_pkey_get_private($this->rsaPrivateKey($keyId));

            //私钥解密
            openssl_private_decrypt($str,$decrypted,$pKey,OPENSSL_PKCS1_PADDING);

            //结果
            $json['flag'] = 0;
            $json['decoded'] = $decrypted;
        }

        $this->response->setJsonContent($json);
        return false;
    }


    //test
    public function createAction()
    {
        echo '<pre>';
        //创建密钥对
        //$rsaPair = openssl_pkey_new([]);

        $rsaPair = openssl_pkey_new([
            'private_key_bits'=>401
        ]);

        //get 私钥
        openssl_pkey_export($rsaPair, $privateKey);

        var_dump($privateKey);

        // get detail of private key
        //array(
        //  bits    位数
        //  key 公钥
        //  rsa => array(
        //      n 模
        // 。。。。。。
        //  )
        //  type
        //)
        $privateKeyDetail = openssl_pkey_get_details($rsaPair);

        /*
        //这样也行，两种方法
        $privateKeySource = openssl_get_privatekey($privateKey);
        $privateKeyDetail = openssl_pkey_get_details($privateKeySource);
        */

        //get 公钥 public key
        var_dump($privateKeyDetail['key']);


        var_dump('------------------------------------------ private key start ------------------------------------------');
        //模 n ，一般用hex 显示
        var_dump(strtoupper(bin2hex($privateKeyDetail['rsa']['n'])));
        //指数 e

        var_dump(bin2hex($privateKeyDetail['rsa']['e']));

        var_dump(strtoupper(bin2hex($privateKeyDetail['rsa']['d'])));

        var_dump('------ p and q ------');
        var_dump((bin2hex($privateKeyDetail['rsa']['p'])));
        var_dump((bin2hex($privateKeyDetail['rsa']['q'])));

        var_dump('------------------------------------------ private key end ------------------------------------------');
        var_dump('');


        var_dump('------------------------------------------ public key start ------------------------------------------');
        //也可以用public key 获取 detail
        //public 的 detail 里面的 rsa 的东西要少些
        $publicKeySource = openssl_get_publickey($privateKeyDetail['key']);
        $publicKeyDetail = openssl_pkey_get_details($publicKeySource);

        var_dump(strtoupper(bin2hex($publicKeyDetail['rsa']['n'])));
        var_dump(bin2hex($privateKeyDetail['rsa']['e']));

        var_dump('------------------------------------------ public key end ------------------------------------------');
        var_dump($publicKeyDetail);


        echo '</pre>';
        return false;

    }
}

引用

• rsa
  http://www-cs-students.stanford.edu/~tjw/jsbn/

• demo
  http://www-cs-students.stanford.edu/~tjw/jsbn/rsa.html