书归正传,如示例所示,JavaScript中需要现在浏览器中引入相应的加密库,然后就可以调用相应的加密代码,另外这个加密库也支持NodeJS平台,也可以用如下方式引入和调用。需要说明的是NodeJS平台下的npm安装包和我们下载的版本是不同的,这两种版本不能混用。
<script type="text/javascript" src="path-to/bower_components/crypto-js/crypto-js.js"></script> <script type="text/javascript"> var encrypted = CryptoJS.AES(...); var encrypted = CryptoJS.SHA256(...); </script>
var CryptoJS = require("crypto-js"); // Encrypt var ciphertext = CryptoJS.AES.encrypt('my message', 'secret key 123'); // Decrypt var bytes = CryptoJS.AES.decrypt(ciphertext.toString(), 'secret key 123'); var plaintext = bytes.toString(CryptoJS.enc.Utf8); console.log(plaintext);
完整代码示例如下所示
<script src="crypto-js.js"></script> <script> var data = "Hi There"; var key= iv= CryptoJS.enc.Latin1.parse('AjQ0YQ0MvKKC1uTr');//encrypt var encrypted = CryptoJS.AES.encrypt(data,key,{iv:iv,mode:CryptoJS.mode.CBC,padding:CryptoJS.pad.ZeroPadding}); //decrypt var decrypted = CryptoJS.AES.decrypt(encrypted,key,{iv:iv,padding:CryptoJS.pad.ZeroPadding}); </script>
数据传输到服务端同样需要加密解密才可以使用,否则得到的就只有乱码,没有业务含义,下面分别以两种主流服务端语言C#和Java来说明,服务端的代码实现。需要说明的是单单实现一种平台上的AES加密算法是简单的只要找到相应的函数库完成调用就可以,但是如果需要完成跨平台,跨技术栈,比如在JavaScript加密,C#解密,或者C#加密,Java解密就有些难度,本文的实现是可以达到跨技术栈的目的。
C#
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Security.Cryptography; namespace UEncrypt { class UEncrypt { static void Main(string[] args) { String encryptData = Program.Encrypt("Hi There", "AjQ0YQ0MvKKC1uTr", "AjQ0YQ0MvKKC1uTr"); Console.WriteLine(encryptData); String decryptData = Program.Decrypt(encryptData, "AjQ0YQ0MvKKC1uTr", "AjQ0YQ0MvKKC1uTr"); Console.WriteLine(decryptData); Console.Read(); } public static string Encrypt(string toEncrypt, string key, string iv) { byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key); byte[] ivArray = UTF8Encoding.UTF8.GetBytes(iv); byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt); RijndaelManaged rDel = new RijndaelManaged(); rDel.Key = keyArray; rDel.IV = ivArray; rDel.Mode = CipherMode.CBC; rDel.Padding = PaddingMode.Zeros; ICryptoTransform cTransform = rDel.CreateEncryptor(); byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return Convert.ToBase64String(resultArray, 0, resultArray.Length); } public static string Decrypt(string toDecrypt, string key, string iv) { byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key); byte[] ivArray = UTF8Encoding.UTF8.GetBytes(iv); byte[] toEncryptArray = Convert.FromBase64String(toDecrypt); RijndaelManaged rDel = new RijndaelManaged(); rDel.Key = keyArray; rDel.IV = ivArray; rDel.Mode = CipherMode.CBC; rDel.Padding = PaddingMode.Zeros; ICryptoTransform cTransform = rDel.CreateDecryptor(); byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return UTF8Encoding.UTF8.GetString(resultArray); } } }
Java
public class UEncrypt { public static void main(String args[]) throws Exception { String data = encrypt() System.out.println(data); System.out.println(desEncrypt(data)); } public static String encrypt() throws Exception { try { String data = "Hi There"; String key = "AjQ0YQ0MvKKC1uTr"; String iv = "AjQ0YQ0MvKKC1uTr"; Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); int blockSize = cipher.getBlockSize(); byte[] dataBytes = data.getBytes(); int plaintextLength = dataBytes.length; if (plaintextLength % blockSize != 0) { plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize)); } byte[] plaintext = new byte[plaintextLength]; System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length); SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec); byte[] encrypted = cipher.doFinal(plaintext); return new sun.misc.BASE64Encoder().encode(encrypted); } catch (Exception e) { } } public static String desEncrypt( String data ) throws Exception { try { String key = "AjQ0YQ0MvKKC1uTr"; String iv = key; byte[] encrypted1 = new BASE64Decoder().decodeBuffer(data); Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec); byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original); return originalString; } catch (Exception e) { } } }
总结
本文总结了JavaScript, C#, Java三种平台上的AES加密解密算法实现,完整的实现了跨技术栈的加密解密,可以在NodeJS加密,C#解密,希望对大家有所帮助。