JS前端加密JAVA后端解密详解最近有⼀个加解密的需求，其实没有什么难度，但是实践过程中踩了很多坑，把踩坑过程分享出来。
1、前端JS加密
/**
* 加密（需要先加载aes.min.js⽂件）
* @param word
* @returns {*}
*/
function aesMinEncrypt(word){
var _word = Utf8.parse(word),
_key = Utf8.parse("ihaierForTodoKey"),
_iv = Utf8.parse("ihaierForTodo_Iv");
js argumentsvar encrypted = pt(_word, _key, {
iv: _iv,
mode: de.CBC,
padding: CryptoJS.pad.Pkcs7
});
String();
}
key：⼗六位作为密钥（前后端必须⼀致）
iv：⼗六位作为密钥偏移量（前后端必须⼀致）
算法：AES/CBC/PKCS7Padding
注意点：JAVA本⾝不⽀持PKCS7，只⽀持PKCS5，但是通过实验，两者即使不⼀样，也可以进⾏解密
2、后端JAVA解密
需要导⼊的jar包（版本没要求）：
dec.jar
org.apachemons.lang.jar
package p.util;
pto.Cipher;
pto.spec.IvParameterSpec;
pto.spec.SecretKeySpec;
import dec.binary.Base64;
import org.apachemons.lang.StringUtils;
public class AesUtil {
/
/密钥 (需要前端和后端保持⼀致)⼗六位作为密钥
private static final String KEY = "ihaierForTodoKey";
//密钥偏移量 (需要前端和后端保持⼀致)⼗六位作为密钥偏移量
private static final String IV = "ihaierForTodo_Iv";
//算法
private static final String ALGORITHMSTR = "AES/CBC/PKCS5Padding";
//SSO的TOKEN
private static final String token = "4AaWABnPB5/1Z2EIEXwSfigudpiM4kzLkmIrKQPmS9w=";
/**
* 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{
/**sun.misc.BASE64Decoder是java内部类，有时候会报错，
* ⽤dec.binary.Base64替代，效果⼀样。
*/
//Base64 base64 = new Base64();
//byte[] bytes = base64.decodeBase64(new String(base64Code).getBytes());
//new BASE64Decoder().decodeBuffer(base64Code);
return StringUtils.isEmpty(base64Code) ? null : new Base64().decodeBase64(new String(base64Code).getBytes());
}
/**
* AES解密
* @param encryptBytes 待解密的byte[]
* @return解密后的String
* @throws Exception
*/
public static String aesDecryptByBytes(byte[] encryptBytes) throws Exception {
Cipher cipher = Instance(ALGORITHMSTR);
byte[] temp = IV.getBytes("UTF-8");
IvParameterSpec iv = new IvParameterSpec(temp);
cipher.init(Cipher.DECRYPT_MODE, new Bytes(), "AES"), iv);
byte[] decryptBytes = cipher.doFinal(encryptBytes);
System.out.print(new String(decryptBytes));
return new String(decryptBytes);
}
/**
* 将base 64 code AES解密
* @param encryptStr 待解密的base 64 code
* @return解密后的string
* @throws Exception
*/
public static String aesDecrypt(String encryptStr) throws Exception {
return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr));
}
public static void main(String[] args) throws Exception {
aesDecrypt(token);
}
}
密钥和密钥便宜量必须和前端⼀致
算法可以采⽤PKCS5（JAVA本⾝不⽀持PKCS7），如果想使⽤PKCS7，需要额外引⼊jar包。
附录：aes.min.js压缩⽂件
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