import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.security.SecureRandom;
import java.util.Base64;
/**
-
@author :jinxk
-
@modified By:
-
@version: V1.0
*/
public class AESUtils {public static String aesEncode(String content,String aeskey) throws Exception {
try {
//1.构造密钥生成器,指定为AES算法,不区分大小写
KeyGenerator keyGenerator = KeyGenerator.getInstance(“AES”);
//2.根据ecnodeRules规则初始化密钥生成器
//生成一个128位的随机源,根据传入的字节数组
SecureRandom random = SecureRandom.getInstance(“SHA1PRNG”);
random.setSeed(aeskey.getBytes());
keyGenerator.init(128, random);
//3.产生原始对称密钥
SecretKey originalKey = keyGenerator.generateKey();
//4.获得原始对称密钥的字节数组
byte[] raw = originalKey.getEncoded();
//5.根据字节数组生成AES密钥
SecretKey key = new SecretKeySpec(raw, “AES”);
//6.根据指定算法AES自成密码器
Cipher cipher = Cipher.getInstance(“AES”);
//7.初始化密码器,第一个参数为加密(Encrypt_mode)或者解密解密(Decrypt_mode)操作,第二个参数为使用的KEY
cipher.init(Cipher.ENCRYPT_MODE, key);
//8.获取加密内容的字节数组(这里要设置为utf-8)不然内容中如果有中文和英文混合中文就会解密为乱码
byte[] byteEncode = content.getBytes(StandardCharsets.UTF_8);
//9.根据密码器的初始化方式–加密:将数据加密
byte[] byteAES = cipher.doFinal(byteEncode);
//10.将加密后的数据转换为字符串
//11.将字符串返回
return new String(Base64.getEncoder().encode(byteAES));
} catch (Exception e) {
throw e;
}
}/**
- 解密
- 解密过程:
- 1.同加密1-4步
- 2.将加密后的字符串反纺成byte[]数组
- 3.将加密内容解密
- @throws Exception
/
public static String aesDecode(String content,String aeskey) throws Exception {
try {
//1.构造密钥生成器,指定为AES算法,不区分大小写
KeyGenerator keygen = KeyGenerator.getInstance(“AES”);
//2.根据ecnodeRules规则初始化密钥生成器
//生成一个128位的随机源,根据传入的字节数组
SecureRandom random = SecureRandom.getInstance(“SHA1PRNG”);
random.setSeed(aeskey.getBytes());
keygen.init(128, random);
//3.产生原始对称密钥
SecretKey originalKey = keygen.generateKey();
//4.获得原始对称密钥的字节数组
byte[] raw = originalKey.getEncoded();
//5.根据字节数组生成AES密钥
SecretKey key = new SecretKeySpec(raw, “AES”);
//6.根据指定算法AES自成密码器
Cipher cipher = Cipher.getInstance(“AES”);
//7.初始化密码器,第一个参数为加密(Encrypt_mode)或者解密(Decrypt_mode)操作,第二个参数为使用的KEY
cipher.init(Cipher.DECRYPT_MODE, key);
//8.将加密并编码后的内容解码成字节数组
byte[] byteContent = Base64.getDecoder().decode(content);
/
* 解密
*/
byte[] byteDecode = cipher.doFinal(byteContent);
return new String(byteDecode, StandardCharsets.UTF_8);
} catch (Exception e) {
throw e;
}
}
}