package com.bas.util;




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




import org.apache.commons.codec.binary.Hex;


public class AESUtil {


/**加密
* 因为Java默认不支持16位以上的密码，如果密码为16位以上，则会取中间的16位作为密码
* @param content  待加密内容 
* @param password 加密密钥 
* @return 
*/  
public static String encrypt(String input, String key){
byte[] crypted = null;
try{
if(key.length()>16){
key = disposeKey(key);
}
SecretKeySpec skey = new SecretKeySpec(key.getBytes("utf-8"), "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, skey);
crypted = cipher.doFinal(input.getBytes("utf-8"));
}catch(Exception e){
e.printStackTrace();
}
return Hex.encodeHexString(crypted);
}

/**解密
* 因为Java默认不支持16位以上的密码，如果密码为16位以上，则会取中间的16位作为密码
* @param content  待解密内容 
* @param password 解密密钥 
* @return 
*/  
public static String decrypt(String input, String key){
byte[] output = null;
try{
if(key.length()>16){
key = disposeKey(key);
}
SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, skey);
output = cipher.doFinal(Hex.decodeHex(input.toCharArray()));
}catch(Exception e){
System.out.println(e.toString());
}
return new String(output);
}
/**
* 处理Key,如果Key的值超过16位，Java默认不支持，所以需要对超过16位的key值进行处理
* @param key
* @return
*/
public static String disposeKey(String key){
if(key.length()>16){
int leftIndex = (key.length()-16)/2;
int rightIndex = leftIndex + 16;
key = key.substring(leftIndex, rightIndex);
}
System.out.println(key);
return key;
}


public static void main(String[] args) {
String encode="55f5776a611we23r737adbba9463d43134e9c8865581f6e13b578dcd06f02eac";
String key="a9A0X`hwewee;S";
String content="0121060219901215306X";
String decrypt = decrypt(encode, key);
System.out.println(decrypt.equals(content));
String encrypt = encrypt(content, key);
System.out.println(encrypt.equals(encode));
}


/**加密
* 因为Java默认不支持16位以上的密码，如果密码为16位以上，则会取中间的16位作为密码
* @param content  待加密内容 
* @param password 加密密钥 
* @return 
*/  
/* public static String encrypt(String input, String key){
byte[] crypted = null;
try{
if(key.length()>16){
key = disposeKey(key);
}
SecretKeySpec skey = new SecretKeySpec(key.getBytes("utf-8"), "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, skey);
crypted = cipher.doFinal(input.getBytes("utf-8"));
}catch(Exception e){
e.printStackTrace();
}
return  parseByte2HexStr(crypted);
}

*//**解密
* 因为Java默认不支持16位以上的密码，如果密码为16位以上，则会取中间的16位作为密码
* @param content  待解密内容 
* @param password 解密密钥 
* @return 
*//*  
public static String decrypt(String input, String key){
byte[] output = null;
try{
if(key.length()>16){
key = disposeKey(key);
}
SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, skey);
output = cipher.doFinal(Hex.fromHex(input)parseHexStr2Byte(input));
}catch(Exception e){
System.out.println(e.toString());
}
return new String(output);
}
*//**
* 处理Key,如果Key的值超过16位，Java默认不支持，所以需要对超过16位的key值进行处理
* @param key
* @return
*//*
public static String disposeKey(String key){
if(key.length()>16){
int leftIndex = (key.length()-16)/2;
int rightIndex = leftIndex + 16;
key = key.substring(leftIndex, rightIndex);
}
System.out.println(key);
return key;
}
*//** 
     * 将二进制转换成16进制 
     * 
     * @param buf 
     * @return 
     *//*  
    public static String parseByte2HexStr(byte buf[]) {  
        StringBuilder sb = new StringBuilder();  
        for (int i = 0; i < buf.length; i++) {  
            String hex = Integer.toHexString(buf[i] & 0xFF);  
            if (hex.length() == 1) {  
                hex = '0' + hex;  
            }  
            sb.append(hex.toLowerCase());  
        }  
        return sb.toString();  
    }  
    *//** 
     * 将16进制转换为二进制 
     * 
     * @param hexStr 
     * @return 
     *//*  
    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;  
    }  
public static void main(String[] args) {
String encode="55f5776a6115053337adbba9463d43134e9c8865581f6e13b578dcd06f02eac";
String key="a9A0X?344323h;S";
String content="0121060219901215306X";
String decrypt = decrypt(encode, key);
System.out.println(decrypt);
System.out.println(decrypt.equals(content));
String encrypt = encrypt(content, key);
System.out.println(encrypt);
System.out.println(encrypt.equals(encode));
}*/
}