crypto-js 前后加密解密

快来打我* 2021-09-02 03:05 420阅读 0赞

官网：[https://github.com/brix/crypto-js][https_github.com_brix_crypto-js]

一.java  加密

import javax.crypto.Cipher;
    import javax.crypto.spec.IvParameterSpec;
    import javax.crypto.spec.SecretKeySpec;
    import sun.misc.BASE64Decoder;
     
    public class Encryption
    {
        public static void main(String args[]) throws Exception {
        	String data = "Test String啊啊啊啊啊啊啊啊啊啊啊啊啊啊";
        	String s=encrypt(data);
            System.out.println(s);
            System.out.println(desEncrypt(s));
    
    
        }
     
        public static String encrypt(String data) throws Exception {
            try {
                
                String key = "1234567812345678";
                String iv = "1234567812345678";
                Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
                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) {
                e.printStackTrace();
                return null;
            }
        }
     
        public static String desEncrypt(String data) throws Exception {
            try
            {
                String key = "1234567812345678";
                String iv = "1234567812345678";
                 
                byte[] encrypted1 = new BASE64Decoder().decodeBuffer(data);
                 
                Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
                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) {
                e.printStackTrace();
                return null;
            }
        }
    }

二.前端解密

<html>
        <head>
    <script src="aes.js"></script>
    <script>
        var data = "Hello,World!";
    	var key  = CryptoJS.enc.Utf8.parse('1234567812345678');
    	var iv   = CryptoJS.enc.Utf8.parse('1234567812345678');
        // 加密
        var encrypted = CryptoJS.AES.encrypt(data, key, { iv: iv,mode:CryptoJS.mode.CBC,padding:CryptoJS.pad.Pkcs7});
    	
        document.write("encode:"+encrypted);
    	// 解密
    	var decrypted = CryptoJS.AES.decrypt(encrypted,key,{iv:iv,mode:CryptoJS.mode.CBC});
    	alert(decrypted.toString(CryptoJS.enc.Utf8));
    </script>
    </script>
        </head>
        <body style="font-family: monospace; white-space:pre;">
        </body>
    </html>

三.注意问题

1.后端加密的串如果放在url ,前端获取的话，会有问题（base64 有特殊字符，url 对特殊字符有影响）

这时 后端可以用Hex.decodeHex  对之前的加密的串 在进行转 哈希编码

![20200929112447458.png][]

不过后端 base64的转换的时候，不要带着空，回车键等空格。

然后前端通过Buffer.from("后端传过来的 编码" ,'hex') 转成 crypto 加密的串，然后在用crypto 解密

var encrypted= this.$route.query.params;
    		let output = Buffer.from(encrypted, 'hex')
    		console.log('解析的数据：',output.toString('utf8'))
    		// 密钥
    		// 十六位十六进制数
    		const cryptoKey = CryptoJS.enc.Utf8.parse('1234567812345678');
    		// 密钥偏移量
    		const cryptoIv = CryptoJS.enc.Utf8.parse('1234567812345678');
    
    		let decrypted = CryptoJS.AES.decrypt(,output.toString('utf8'), cryptoKey, { iv: cryptoIv, mode: CryptoJS.mode.CBC });
    		let val = decrypted.toString(CryptoJS.enc.Utf8)
    		console.log('解密的参数：',val)

[https_github.com_brix_crypto-js]: https://github.com/brix/crypto-js
[20200929112447458.png]: /images/20210813/149f35b929e041a19a4314cce77916bd.png