package com.github.lazylibrary.util;
import android.util.Log;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
/**
* 作者:Administrator on 2016/8/22 13:57
* 邮箱:906514731@qq.com
*/
public class AES {
/**加密
* @throws Exception
*/
public static String Encrypt(String sSrc, String sKey) throws Exception {
if (sKey == null) {
Log.e("Key为空null","Key为空null");
return null;
}
// 判断Key是否为16位
if (sKey.length() != 16) {
Log.e("\"Key长度不是16位\"","Key长度不是16位");
return null;
}
byte[] raw = sKey.getBytes();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");//"算法/模式/补码方式"
IvParameterSpec iv = new IvParameterSpec("1234567890123456".getBytes());//使用CBC模式,需要一个向量iv,可增加加密算法的强度
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(sSrc.getBytes());
return Base64_2.encode(encrypted);//此处使用BASE64做转码功能,同时能起到2次加密的作用。
}
// 解密
public static String Decrypt(String sSrc, String sKey) throws Exception {
try {
// 判断Key是否正确
if (sKey == null) {
Log.e("Key为空null","Key为空null");
return null;
}
// 判断Key是否为16位
if (sKey.length() != 16) {
Log.e("\"Key长度不是16位\"","Key长度不是16位");
return null;
}
byte[] raw = sKey.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec("1234567890123456".getBytes());
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] encrypted1 = Base64_2.decode(sSrc);//先用base64解密
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;
}
}
}