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JS客户端AES加密，Java服务端解密

2016-12-20 10:30 288 查看

JS客户端AES加密，Java服务端解密

/**
* 编码工具类
* 实现aes加密、解密
*/
import java.math.BigInteger;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang.StringUtils;

import sun.misc.BASE64Decoder;
public class EncryptUtils {

/**
* 密钥
*/
public static final String KEY = "12345678901234561234567890123456";

/**
* 算法
*/
private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";

public static void main(String[] args) throws Exception {
String content = "我爱你";
System.out.println("加密前：" + content);
System.out.println("加密密钥和解密密钥：" + KEY +"   "+KEY.length());
System.out.println("加密密钥和解密密钥：" + KEY.getBytes().length );
String encrypt = aesEncrypt(content, KEY);
System.out.println("加密后：" + encrypt);
String decrypt = aesDecrypt(encrypt, KEY);
System.out.println("解密后：" + decrypt);
}

/**
* aes解密
* @param encrypt   内容
* @return
* @throws Exception
*/
public static String aesDecrypt(String encrypt) throws Exception {
return aesDecrypt(encrypt, KEY);
}

/**
* aes加密
* @param content
* @return
* @throws Exception
*/
public static String aesEncrypt(String content) throws Exception {
return aesEncrypt(content, KEY);
}

/**
* 将byte[]转为各种进制的字符串
* @param bytes byte[]
* @param radix 可以转换进制的范围，从Character.MIN_RADIX到Character.MAX_RADIX，超出范围后变为10进制
* @return 转换后的字符串
*/
public static String binary(byte[] bytes, int radix){
return new BigInteger(1, bytes).toString(radix);// 这里的1代表正数
}

/**
* base 64 encode
* @param bytes 待编码的byte[]
* @return 编码后的base 64 code
*/
public static String base64Encode(byte[] bytes){
return Base64.encodeBase64String(bytes);
}

/**
* base 64 decode
* @param base64Code 待解码的base 64 code
* @return 解码后的byte[]
* @throws Exception
*/
public static byte[] base64Decode(String base64Code) throws Exception{
return StringUtils.isEmpty(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code);
}

/**
* AES加密
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的byte[]
* @throws Exception
*/
public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(256);
Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));

return cipher.doFinal(content.getBytes("utf-8"));
}

/**
* AES加密为base 64 code
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的base 64 code
* @throws Exception
*/
public static String aesEncrypt(String content, String encryptKey) throws Exception {
return base64Encode(aesEncryptToBytes(content, encryptKey));
}

/**
* AES解密
* @param encryptBytes 待解密的byte[]
* @param decryptKey 解密密钥
* @return 解密后的String
* @throws Exception
*/
public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(256);

Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
byte[] decryptBytes = cipher.doFinal(encryptBytes);

return new String(decryptBytes);
}

/**
* 将base 64 code AES解密
* @param encryptStr 待解密的base 64 code
* @param decryptKey 解密密钥
* @return 解密后的string
* @throws Exception
*/
public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
}
}

js代码

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>aes测试</title>
<script type="text/javascript" src="aes.js"></script>
<script type="text/javascript" src="../components/mode-ecb.js"></script>
</head>
<body>

</body>

<script type="text/javascript">

function Encrypt(word){
var key = CryptoJS.enc.Utf8.parse("abcdefgabcdefg12");

var srcs = CryptoJS.enc.Utf8.parse(word);
var encrypted = CryptoJS.AES.encrypt(srcs, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
return encrypted.toString();
}
function Decrypt(word){
var key = CryptoJS.enc.Utf8.parse("abcdefgabcdefg12");

var decrypt = CryptoJS.AES.decrypt(word, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
return CryptoJS.enc.Utf8.stringify(decrypt).toString();
}

alert(Encrypt("我爱你"));
alert(Decrypt(Encrypt("我爱你")))

</script>
</html>

注意点

js中需要引入CryptoJS的架包.下载地址

使用aes时，js代码不要暴漏在外面，不然key会被拿到

PKCS5Padding和PKCS7Padding的结果是一样

256的加密需要JDK补丁。下载地址

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标签： java AES加密加密解密

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