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package apistore;
 
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.Console;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Arrays;
import java.util.Collection;
import java.util.Random;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import sun.misc.BASE64Decoder;
 
 
//用户请使用UTF-8作为源码文件的保存格式，避免出现乱码问题
public class AES128_APIStore {
    /**
     * 远程post
     * @param strUrl
     * @param param
     * @return
     */
    public static String requestPost(String strUrl, String param) {
        String returnStr = null; // 返回结果定义
        URL url = null;
        HttpURLConnection httpURLConnection = null;
 
        try {
            url = new URL(strUrl);
            httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestProperty("Accept-Charset", "utf-8");
            httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            httpURLConnection.setRequestMethod("POST"); // post方式
            httpURLConnection.connect();
            //System.out.println("ResponseCode:" + httpURLConnection.getResponseCode());
            //POST方法时使用
            byte[] byteParam = param.getBytes("UTF-8");
            DataOutputStream out = new DataOutputStream(httpURLConnection.getOutputStream());
            out.write(byteParam);
            out.flush();
            out.close();
            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(httpURLConnection.getInputStream(), "utf-8"));
            StringBuffer buffer = new StringBuffer();
            String line = "";
            while ((line = reader.readLine()) != null) {
                buffer.append(line);
            }
 
            reader.close();
            returnStr = buffer.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        } finally {
            if (httpURLConnection != null) {
                httpURLConnection.disconnect();
            }
        }
        return returnStr;
    }
 
    /**
     * 加密字符串
     * @param key
     * @param data
     * @return
     */
    public static String encrypt(String key, String data)  {
        try {
            String iv = "0000000000000000";
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            int blockSize = cipher.getBlockSize();
            byte[] dataBytes = data.getBytes();
            int plaintextLength = dataBytes.length;
            if (plaintextLength % blockSize != 0) {
                plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
            }
            byte[] plaintext = new byte[plaintextLength];
            System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
            byte[] encrypted = cipher.doFinal(plaintext);
            return new sun.misc.BASE64Encoder().encode(encrypted);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
 
    /**
     * 解密字符串
     * @param key
     * @param data
     * @return
     */
    public static String decrypt(String key, String data)  {
        try
        {
            String iv = "0000000000000000";
            byte[] encrypted1 = new BASE64Decoder().decodeBuffer(data);
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
            cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
            byte[] original = cipher.doFinal(encrypted1);
            String originalString = new String(original);
            return originalString;
        }
        catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
 
    /**
     * return
     * @param args
     */
    public static void main(String[] args) {
        //接口地址
        //使用本接口,需要在安全设置页面,设置接入模式为aes128
 
        String url="https://v.1dq.com/api/bank/v4";
        //您的appid
        String appid = "xxxx";
        //您的APPKEY / 32位
        String appkey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
        //需要传递的数据
        String params  = "{\"appid\":\""+appid+"\",\"bankcard\" : \"62220211111\",\"realName\" : \"张三\",\"cardNo\" : \"12345678\",\"Mobile\" : \"15618181818\",\"cardtype\" : \"\",\"information\" : \"\"}";
 
        //加密数据
        String sign = encrypt(appkey,params);
        //远程的请求;
        String  requestData = "appid="+appid+"&sign="+URLEncoder.encode(sign);
        //执行远程请求
        String returnStr = requestPost(url, requestData);
        System.out.println("sign:"+sign);
        System.out.println("传递的参数:"+requestData);
        System.out.println("远程服务器返回:"+returnStr);
        System.out.println("远程服务器返回:"+decrypt(appkey,returnStr));
 
    }
 
}
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