前言

上一篇博客RSA加密 - Java实现了Java版的RSA公钥加密-私钥解密，私钥加密-公钥解密，这篇博客实现Vue下的加解密，记录两种前后端下加解密的场景：

  • 前端公钥加密 - 后端私钥解密
  • 后端私钥加密 - 前端公钥解密

附上其它链接：
RSA加密 - Java
RSA分段加密 - Java
RSA分段解密 - Vue


前端公钥加密-后端私钥解密

这种状况较为简单，是通用的做法

  • 装置jsencrypt

    npm install jsencrypt

  • RSAEncryption.js

    /** * 非对称加密-RSA * 前端公钥加密 - 后端私钥解密 * */import { JSEncrypt } from 'jsencrypt/lib/JSEncrypt'// 这里的公钥在Java端生成const PUBLIC_KEY = 'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCaaI4MBywkCjIppZnraqN3pbrcZTq/t0+aMBo8K3pK9BDD6XkM6N2Yfcva7BSFbUWuAcI7piXak0UKn9CElDuhNzUSgQn4IXKxIt3Iva5cV83qYumj+0yRjjLT8Muu1Y1rgBZjY9oBwhVoV+Twg25+UJ+6Q6HM4xTwQQJDoyy4jwIDAQAB';// 注：失常状况下私钥并不会记录在前端，这里应用私钥解密只是记录私钥解密办法const PRIVATE_KEY = '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';export const RSAENCRY = {  /**   * 公钥加密   * @param val 须要加密的字符串   * @return string 返回加密后果   */  encryptByPublicKey: function (val = '') {      if(val === ''){          return '';      }      let encryptor = new JSEncrypt() // 新建JSEncrypt对象      encryptor.setPublicKey(PUBLIC_KEY) // 设置公钥      return encryptor.encrypt(val) // 对须要加密的数据进行加密  },  /**   * 私钥解密   * @param val   * @returns {string|false|null|PromiseLike<ArrayBuffer>}   */  decryptByPrivateKey: function (val = '') {      if(val === ''){          return '';      }      let decrypt = new JSEncrypt() // 新建JSEncrypt对象      decrypt.setPrivateKey(PRIVATE_KEY) // 设置私钥      return decrypt.decrypt(val) // 对须要解密的数据进行解密  }}

  • 验证加解密

    import { RSAENCRY } from "../utils/RSAEncryption"let data = "RSA encrypt!";let encryptDataByPublicKey = RSAENCRY.encryptByPublicKey(data);console.log("encryptDataByPublicKey: ", encryptDataByPublicKey)let decryptDataByPrivateKey = RSAENCRY.decryptByPrivateKey(encryptDataByPublicKey);console.log("decryptDataByPrivateKey: ", decryptDataByPrivateKey)
  • 后果如下

    ok，如图所示，曾经实现了惯例的前端公钥加密，后端私钥解密


后端私钥加密 - 前端公钥解密

这种状况有点牵强，起因是不想将私钥记录在前端，所以由后端私钥加密-前端公钥来解密，后端私钥加密的内容RSA加密 - Java中有记录，这里不再反复，要实现前端公钥解密须要批改配置文件中的内容

  • 从node-modules中复制jsencrypt，这里我复制到了src/libs目录下
  • 批改src/libs/jsencrypt/lib/lib/jsbn/rsa.js
1. 批改 RSAKey.prototype.decrypt 中 this.doPrivate(c) 为 this.doPublic(c);RSAKey.prototype.decrypt = function (ctext) {    var c = parseBigInt(ctext, 16);    var m = this.doPublic(c);    //var m = this.doPrivate(c);    if (m == null) {        return null;    }    return pkcs1unpad2(m, (this.n.bitLength() + 7) >> 3);};2. 批改 pkcs1unpad2 正文代码function pkcs1unpad2(d, n) {     var b = d.toByteArray();    var i = 0;    while (i < b.length && b[i] == 0) {        ++i;    }    // 正文该处代码    // if (b.length - i != n - 1 || b[i] != 2) {    //     return null;    // }    ++i;    while (b[i] != 0) {        if (++i >= b.length) {            return null;        }    }    var ret = "";    while (++i < b.length) {        var c = b[i] & 255;        if (c < 128) { // utf-8 decode            ret += String.fromCharCode(c);        } else if ((c > 191) && (c < 224)) {            ret += String.fromCharCode(((c & 31) << 6) | (b[i + 1] & 63));            ++i;        } else {            ret += String.fromCharCode(((c & 15) << 12) | ((b[i + 1] & 63) << 6) | (b[i + 2] & 63));            i += 2;        }    }    return ret;}
  • RSADecryption.js
/** * 非对称加密-RSA * 后端私钥加密 - 前端公钥解密 *//** * 非对称加密-RSA * 后端私钥加密 - 前端公钥解密 */import { JSEncrypt } from '../libs/jsencrypt/lib/JSEncrypt'const PUBLICKEY = 'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCaaI4MBywkCjIppZnraqN3pbrcZTq/t0+aMBo8K3pK9BDD6XkM6N2Yfcva7BSFbUWuAcI7piXak0UKn9CElDuhNzUSgQn4IXKxIt3Iva5cV83qYumj+0yRjjLT8Muu1Y1rgBZjY9oBwhVoV+Twg25+UJ+6Q6HM4xTwQQJDoyy4jwIDAQAB';export const RSADECRY = {    /**     * 公钥解密     * @param secretWord     * @returns {解密|string|false|PromiseLike<ArrayBuffer>}     */    decryptByPublicKey: function (val = '') {        if (val === '') {            return '';        }        let encrypt = new JSEncrypt();        encrypt.setPublicKey(PUBLICKEY);        //应用公钥对私钥加密后的数据解密        return encrypt.decrypt(val);    }}
  • 调用后端encryByPrivateKey函数生成私钥加密密文
String data = "RSA encrypt!";String encryDataByPrivateKey = encryptByPrivateKey(data);System.out.println("encryDataByPrivateKey: " + encryDataByPrivateKey);

后果如下所示：

  • 前端公钥解密调用
import { RSADECRY } from "../utils/RSADecryption"let decryptData = "AwovsO+xeiFSQe6mN9RRCz3FFlMXdCMcrqbNChsc7PbMfCxSHpKWIHQ2IJ/tw8mFsuX84r7TSVhYXB9ATA7nqWxMnKJgkPu+nFXeXSnApjce0MjFtjLpl9wrklVrOL6L0cmzu3DthC44Opwj5EVWF9tjiH7YdKFVK/Q5HVPKcZk=";let decryptDataByPublicKey = RSADECRY.decryptByPublicKey(decryptData);console.log("decryptDataByPublicKey: ", decryptDataByPublicKey)

后果如下所示：

参考博客：https://my.oschina.net/lwenhao/blog/4304318


源码

  • GitHub： https://github.com/Maggieq8324/coisini-rsa
  • Gitee：https://gitee.com/maggieq8324/coisini-rsa

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