java中AES加密算法128位CBC模式工具类的实现?基于base64

发布于:2021-09-23 22:35:31

这篇是基于base64实现的AES128加密算法,如果觉得base64没什么必要,可以看我下一篇没有base64的AES128加密算法博文


工具类:


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

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
* AES加密128位CBC模式工具类
*/
public class AESUtils {

//加密
public static String Encrypt(String content, String IV, String KEY) throws Exception {
byte[] raw = KEY.getBytes("utf-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");//"算法/模式/补码方式"
//使用CBC模式,需要一个向量iv,可增加加密算法的强度
IvParameterSpec ips = new IvParameterSpec(IV.getBytes());
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ips);
byte[] encrypted = cipher.doFinal(content.getBytes());
return new BASE64Encoder().encode(encrypted);
}

//解密
public static String Decrypt(String content, String KEY, String IV) throws Exception {
try {
byte[] raw = KEY.getBytes("utf-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(IV.getBytes());
cipher.init(Cipher.DECRYPT_MODE, skeySpec, ips);
byte[] encrypted1 = new BASE64Decoder().decodeBuffer(content);
try {
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original);
return originalString;
} catch (Exception e) {
System.out.println(e.toString());
return null;
}
} catch (Exception ex) {
System.out.println(ex.toString());
return null;
}
}

}

?Main方法测试:


public class DecodeTest {
public static void main(String[] args) throws Exception {

String a = "a nice body";

//abcdefertyuiojgr是密钥,MAAAYAAAAAAAAABg是iv
String encrypt = AESUtils.Encrypt(a, "abcdefertyuiojgr", "MAAAYAAAAAAAAABg");

String b = AESUtils.Decrypt(encrypt, "abcdefertyuiojgr", "MAAAYAAAAAAAAABg");

System.out.println(b);


}
}

?

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