微信退款异步通知报文解密

Z时代
2024-01-10
分类：综合

拿到报文对req_info 用商户秘钥进行解密

package com.ly.upg.message.util;
import com.alibaba.fastjson.JSONObject;
import com.snake.bsys.common.log.Log;
import com.tencent.common.MD5;
import com.tencent.common.XMLParser;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;
import java.util.Base64;
import java.util.HashMap;
import java.util.Map;
/**
 * @Title:
 * @Description:微信退款报文解密
 * @Created by yangjie on 2020/1/4/15:18.
 */
public class WxDecryptUtil {
    public static Map excute(String keyStr,String orgStr) throws BadPaddingException, IllegalBlockSizeException {
//MD5.MD5Encode(secretKey).toLowerCase().getBytes()
        SecretKeySpec key = new SecretKeySpec((MD5.MD5Encode(keyStr).toLowerCase().getBytes()), "AES");
        Security.addProvider(new BouncyCastleProvider());
        Cipher cipher = null;
        try {
            cipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        }
        try {
            cipher.init(Cipher.DECRYPT_MODE, key);
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        }
        Base64.Decoder decoder = Base64.getDecoder();
        String reqInfo = orgStr.replaceAll(" ","+");
        byte[] decryptContent = cipher.doFinal(decode(reqInfo));
        try {
            Map map = new HashMap();
            map = XMLParser.getMapFromXML(new String(decryptContent, "utf-8"));
            Log.logger.info("微信解密后的报文-->"+ JSONObject.toJSONString(map));
            return map;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
    public static byte[] decode(String encodedText){
        final Base64.Decoder decoder = Base64.getDecoder();
        return decoder.decode(encodedText);
    }
    public static void main(String[] args) {
        try {
            // req_info 
            String org = "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";      
            // 商户秘钥
            String key = "HqPzKWBaZyhvClKXiqUO2uR5kzg84Pyb";
            Map test = excute(key,org);
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        }
    }
}

package com.ly.upg.message.util;
import com.alibaba.fastjson.JSONObject;
import com.snake.bsys.common.log.Log;
import com.tencent.common.MD5;
import com.tencent.common.XMLParser;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.xml.sax.SAXException;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.security.Security;
import java.util.Base64;
import java.util.HashMap;
import java.util.Map;
/**
 * @Title:
 * @Description:
 * @Created by yangjie on 2020/1/3/18:46.
 */
public class CipherTextUtil {
    /**
     * 密钥算法
     */
    private static final String ALGORITHM = "AES";
    /**
     * 加解密算法/工作模式/填充方式
     */
    private static final String ALGORITHM_MODE_PADDING = "AES/ECB/PKCS7Padding";
    static {
        try {
            Security.addProvider(new BouncyCastleProvider());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * AES解密
     */
    public static String decryptData(byte[] b,SecretKeySpec key) throws Exception {
        Cipher cipher = Cipher.getInstance(ALGORITHM_MODE_PADDING);
        cipher.init(Cipher.DECRYPT_MODE, key);
        return new String(cipher.doFinal(b));
    }
    public static Map decrypt(String secretKey, String orgStr) throws IOException, SAXException, ParserConfigurationException {
        SecretKeySpec key = new SecretKeySpec(MD5.MD5Encode(secretKey).toLowerCase().getBytes(), ALGORITHM);
        Log.logger.info("微信退款解密原始字符串-->"+orgStr);
        Log.logger.info("微信退款解密key-->"+secretKey);
        byte[] b = new byte[0];
        try {
            b = Base64Util.decode(orgStr.replaceAll(" ","+"));
            if(b == null|| b.length == 0){
                Log.logger.error("微信解密原始字符串-解码失败decode.");
                return null;
            }
        }catch (Exception e){
            Log.logger.error("微信解密原始字符串-解码异常decode.");
        }
        String B = null;
        try {
            Log.logger.info("微信退款报文解密AES解密开始:解码b="+JSONObject.toJSONString(b)+",秘钥key="+key.toString());
            Log.logger.info("微信退款报文解密AES解密开始:解码b="+b.length);
            B = decryptData(b,key);
        } catch (Exception e) {
            Log.logger.error("微信退款报文解密AES解密失败"+e.getMessage());
            e.printStackTrace();
            return null;
        }
        Map map = new HashMap();
        map = XMLParser.getMapFromXML(B);
        Log.logger.info("微信解密后的报文-->"+JSONObject.toJSONString(map));
        return map;
    }
    public static byte[] decode(String encodedText){
        final Base64.Decoder decoder = Base64.getDecoder();
        return decoder.decode(encodedText);
    }
    public static void main(String[] args) throws Exception {
        String A = "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";
        byte[] b = Base64Util.decode(A.replaceAll(" ","+"));
        Map map = decrypt("HqPzKWBaZyhvClKXiqUO2uR5kzg84Pyb", A);
        System.out.println(JSONObject.toJSONString(map));
    }
}