AES 256 encryption, you need to download a plug-in from the oracle official website. Put it in the JDK.
Unrestricted JCE policy file download address:
JDK7 download address: https://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
JDK8 download address: http://www .oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html
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The following is my reference, I forgot where it is. . . But it can be used.
package com.sgcc.zcqsm.reshandover.util;
/**
* @Title: AESUtils.java
* @Description: AES密码工具类
* @author liunn
* @date 2020年9月9日12:22:57
* @version V1.0
*/
import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.Provider;
import java.security.SecureRandom;
import java.security.Security;
import java.util.Arrays;
/**
* @author liunn
* @ClassName: AESUtils
* @Description: aes对称加密解密工具类, 注意密钥不能随机生机, 不同客户端调用可能需要考虑不同Provider,
* 考虑安卓与IOS不同平台复杂度,简化不使用Provider
*/
public class AESUtils {
/***默认向量常量**/
public static final String IV = "1234567890123456";
private final static Logger logger = LoggerFactory.getLogger(AESUtils.class);
/**
* 使用PKCS7Padding填充必须添加一个支持PKCS7Padding的Provider
* 类加载的时候就判断是否已经有支持256位的Provider,如果没有则添加进去
*/
static {
if (Security.getProvider(BouncyCastleProvider.PROVIDER_NAME) == null) {
Security.addProvider(new BouncyCastleProvider());
}
}
/**
* 加密 128位
*
* @param content 需要加密的原内容
* @param pkey 密匙
* @return
*/
public static byte[] aesEncrypt(String content, String pkey) {
try {
//SecretKey secretKey = generateKey(pkey);
//byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec skey = new SecretKeySpec(pkey.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");// "算法/加密/填充"
IvParameterSpec iv = new IvParameterSpec(IV.getBytes());
cipher.init(Cipher.ENCRYPT_MODE, skey, iv);//初始化加密器
byte[] encrypted = cipher.doFinal(content.getBytes("UTF-8"));
return encrypted; // 加密
} catch (Exception e) {
logger.info("aesEncrypt() method error:", e);
}
return null;
}
/**
* 获得密钥
*
* @param secretKey
* @return
* @throws Exception
*/
private static SecretKey generateKey(String secretKey) throws Exception {
//防止linux下 随机生成key
Provider p = Security.getProvider("SUN");
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG", p);
secureRandom.setSeed(secretKey.getBytes());
KeyGenerator kg = KeyGenerator.getInstance("AES");
kg.init(secureRandom);
// 生成密钥
return kg.generateKey();
}
/**
* @param content 加密前原内容
* @param pkey 长度为16个字符,128位
* @return base64EncodeStr aes加密完成后内容
* @throws
* @Title: aesEncryptStr
* @Description: aes对称加密
*/
public static String aesEncryptStr(String content, String pkey) {
byte[] aesEncrypt = aesEncrypt(content, pkey);
System.out.println("加密后的byte数组:" + Arrays.toString(aesEncrypt));
String base64EncodeStr = Base64.encodeBase64String(aesEncrypt);
System.out.println("加密后 base64EncodeStr:" + base64EncodeStr);
return base64EncodeStr;
}
/**
* @param content base64处理过的字符串
* @param pkey 密匙
* @return String 返回类型
* @throws Exception
* @throws
* @Title: aesDecodeStr
* @Description: 解密 失败将返回NULL
*/
public static String aesDecodeStr(String content, String pkey) throws Exception {
try {
System.out.println("待解密内容:" + content);
byte[] base64DecodeStr = Base64.decodeBase64(content);
System.out.println("base64DecodeStr:" + Arrays.toString(base64DecodeStr));
byte[] aesDecode = aesDecode(base64DecodeStr, pkey);
System.out.println("aesDecode:" + Arrays.toString(aesDecode));
if (aesDecode == null) {
return null;
}
String result;
result = new String(aesDecode, "UTF-8");
System.out.println("aesDecode result:" + result);
return result;
} catch (Exception e) {
System.out.println("Exception:" + e.getMessage());
throw new Exception("解密异常");
}
}
/**
* 解密 128位
*
* @param content 解密前的byte数组
* @param pkey 密匙
* @return result 解密后的byte数组
* @throws Exception
*/
public static byte[] aesDecode(byte[] content, String pkey) throws Exception {
//SecretKey secretKey = generateKey(pkey);
//byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec skey = new SecretKeySpec(pkey.getBytes(), "AES");
IvParameterSpec iv = new IvParameterSpec(IV.getBytes("UTF-8"));
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");// 创建密码器
cipher.init(Cipher.DECRYPT_MODE, skey, iv);// 初始化解密器
byte[] result = cipher.doFinal(content);
return result; // 解密
}
public static void main(String[] args) throws Exception {
//明文
String content = "今天也要开心哦！";
//密匙
String pkey = "qwertyuiopqwertyuiopqwertyuiopqw";
System.out.println("待加密报文:" + content);
System.out.println("密匙:" + pkey);
String aesEncryptStr = aesEncryptStr(content, pkey);
System.out.println("加密报文:" + aesEncryptStr);
String aesDecodeStr = aesDecodeStr(aesEncryptStr, pkey);
System.out.println("解密报文:" + aesDecodeStr);
System.out.println("加解密前后内容是否相等:" + aesDecodeStr.equals(content));
}
}