【算法】AES前端加解密，Java后端加解密，采用CBC模式
适用范围：
1、前端加密、解密
2、后端加密、解密
3、前端加密、后端解密
4、后端加密、前端解密
前端AES
import CryptoJS from 'crypto-js'
import moment from 'moment'
let key = CryptoJS.enc.Utf8.parse('abcdefg123456789') // key：必须16个字符
let iv = CryptoJS.enc.Utf8.parse('abcdefg123456789'); // 偏移量：必须16个字符
// AES加密
function encrypt(data) {
let encrypted = CryptoJS.AES.encrypt(data, key, {
iv: iv,
mode: CryptoJS.mode.CBC,
padding: CryptoJS.pad.Pkcs7
});
// 返回的是base64格式的密文
return encrypted.ciphertext.toString().toUpperCase();
}
// AES解密
function decrypt(data) {
let encryptedHexStr = CryptoJS.enc.Hex.parse(data);
let srcs = CryptoJS.enc.Base64.stringify(encryptedHexStr);
let decrypted = CryptoJS.AES.decrypt(srcs, key, {
iv: iv,
mode: CryptoJS.mode.CBC,
padding: CryptoJS.pad.Pkcs7
});
let decryptedStr = decrypted.toString(CryptoJS.enc.Utf8);
return decryptedStr.toString();
}
module.exports = {
encrypt: encrypt,
decrypt: decrypt
}
Java后端AES
/**
* AES工具类
*
* @author xiegege
* @date 2020/11/12 10:15
*/
public class AESUtil {
private final static String KEY = "abcdefg123456789"; // key：必须16个字符
private final static String IV = "abcdefg123456789"; // 偏移量：必须16个字符
public static void main(String[] args) {
String content = "谢哥哥666";
//加密
String encrypted = encrypt(content);
//解密
String decrypted = decrypt(encrypted);
System.out.println("加密前：" + content);
System.out.println("加密后：" + encrypted);
System.out.println("解密后：" + decrypted);
}
/**
* 加密返回的数据转换成 String 类型
*
* @param content 明文
*/
public static String encrypt(String content) {
return parseByte2HexStr(Objects.requireNonNull(aesCbcEncrypt(content.getBytes(), KEY.getBytes(), IV.getBytes())));
}
/**
* 将解密返回的数据转换成 String 类型
*
* @param content Base64编码的密文
*/
public static String decrypt(String content) {
return new String(Objects.requireNonNull(aesCbcDecrypt(parseHexStr2Byte(content), KEY.getBytes(), IV.getBytes())));
}
private static byte[] aesCbcEncrypt(byte[] content, byte[] keyBytes, byte[] iv) {
try {
SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(iv));
return cipher.doFinal(content);
} catch (Exception e) {
System.out.println("exception:" + e.toString());
}
return null;
}
private static byte[] aesCbcDecrypt(byte[] content, byte[] keyBytes, byte[] iv) {
try {
SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
return cipher.doFinal(content);
} catch (Exception e) {
System.out.println("exception:" + e.toString());
}
return null;
}
/**
* 将byte数组转换成16进制String
*/
public static String parseByte2HexStr(byte[] buf) {
StringBuilder sb = new StringBuilder();
for (byte b : buf) {
String hex = Integer.toHexString(b & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
/**
* 将16进制String转换为byte数组
*/
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1) {
return null;
}
byte[] result = new byte[hexStr.length() / 2];
for (int i = 0; i < hexStr.length() / 2; i++) {
int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);
result[i] = (byte) (high * 16 + low);
}
return result;
}
}
注意：前后端相互加解密时，前后端的key与iv需要保持一致
1、前端加密、解密
console.log("加密：" + AESUtil.encrypt("谢哥哥666"));
console.log("解密：" + AESUtil.decrypt(AESUtil.encrypt("谢哥哥666")));
2、后端加密、解密
public static void main(String[] args) {
String content = "谢哥哥666";
//加密
String encrypted = encrypt(content);
//解密
String decrypted = decrypt(encrypted);
System.out.println("加密前：" + content);
System.out.println("加密后：" + encrypted);
System.out.println("解密后：" + decrypted);
}
3、前端加密、后端解密
// 前端加密
console.log("加密：" + AESUtil.encrypt("谢哥哥666")); // 5FF2C0CC083FCD5F4F548CEF2846B95D
public static void main(String[] args) {
// 后端解密
String decrypted = decrypt("5FF2C0CC083FCD5F4F548CEF2846B95D");
System.out.println("解密后：" + decrypted); // 谢哥哥666
}
4、后端加密、前端解密
public static void main(String[] args) {
String content = "谢哥哥666";
// 后端加密
String encrypted = encrypt(content);
System.out.println("加密前：" + content); // 谢哥哥666
System.out.println("加密后：" + encrypted); // 5FF2C0CC083FCD5F4F548CEF2846B95D
}
// 前端解密
console.log("解密：" + AESUtil.decrypt("5FF2C0CC083FCD5F4F548CEF2846B95D")); // 谢哥哥666