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public void miniRegister(String code, String encriptData, String iv){
}
private JSONObject getMiniOpenId(String code) throws Exception {
//public static String REQUEST_URL = "https://api.weixin.qq.com/sns/jscode2session?appid=" + APP_ID + "&secret=" + SECRET + "&js_code=";
String url = WXMiniProgram.REQUEST_URL + code;
url += "&grant_type=authorization_code";
HttpClientResult result = HttpClientUtils.doGet(url);
return JSONObject.parseObject(result.getContent());
}
String result = WechatUtil.wxDecrypt(encriptData, session_key, iv);
package com.mjs.common.util;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.security.AlgorithmParameters;
import java.security.Key;
import java.security.Security;
@Slf4j
public class AESUtil {
// 算法名
public static final String KEY_NAME = "AES";
// 加解密算法/模式/填充方式
// ECB模式只用密钥即可对数据进行加密解密,CBC模式需要添加一个iv
public static final String CIPHER_ALGORITHM = "AES/CBC/PKCS7Padding";
/**
* 微信 数据解密<br/>
* 对称解密使用的算法为 AES-128-CBC,数据采用PKCS#7填充<br/>
* 对称解密的目标密文:encrypted=Base64_Decode(encryptData)<br/>
* 对称解密秘钥:key = Base64_Decode(session_key),aeskey是16字节<br/>
* 对称解密算法初始向量:iv = Base64_Decode(iv),同样是16字节<br/>
*
* @param encrypted 目标密文
* @param session_key 会话ID
* @param iv 加密算法的初始向量
*/
public static String wxDecrypt(String encrypted, String session_key, String iv) {
String json = null;
byte[] encrypted64 = Base64.decodeBase64(encrypted);
byte[] key64 = Base64.decodeBase64(session_key);
byte[] iv64 = Base64.decodeBase64(iv);
byte[] data;
try {
init();
json = new String(decrypt(encrypted64, key64, generateIV(iv64)), StandardCharsets.UTF_8);
} catch (Exception e) {
// pad block corrupted
log.debug(e.getLocalizedMessage());
// throw new CustomException(1010, "数据解密错误");
return null;
}
// log.error(json);
return json;
}
/**
* 初始化密钥
*/
public static void init() throws Exception {
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
KeyGenerator.getInstance(KEY_NAME).init(128);
}
/**
* 生成iv
*/
public static AlgorithmParameters generateIV(byte[] iv) throws Exception {
// iv 为一个 16 字节的数组,这里采用和 iOS 端一样的构造方法,数据全为0
// Arrays.fill(iv, (byte) 0x00);
AlgorithmParameters params = AlgorithmParameters.getInstance(KEY_NAME);
params.init(new IvParameterSpec(iv));
return params;
}
/**
* 生成解密
*/
public static byte[] decrypt(byte[] encryptedData, byte[] keyBytes, AlgorithmParameters iv)
throws Exception {
Key key = new SecretKeySpec(keyBytes, KEY_NAME);
Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
// 设置为解密模式
cipher.init(Cipher.DECRYPT_MODE, key, iv);
return cipher.doFinal(encryptedData);
}
/**
* AES解密微信退款回调信息
* 解密方式
* 解密步骤如下:
* (1)对加密串A做base64解码,得到加密串B
* (2)对商户key做md5,得到32位小写key* ( key设置路径:微信商户平台(pay.weixin.qq.com)-->账户设置-->API安全-->密钥设置 )
*
* @param base64Data
* @return
* @throws Exception
*/
public static String decryptData(String base64Data, String PAY_APP_KEY) throws Exception {
// 这个地方调用BouncyCastleProvider 让java支持PKCS7Padding
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding");
SecretKeySpec key = new SecretKeySpec(MD5Utils.MD5Encode(PAY_APP_KEY).toLowerCase().getBytes(), KEY_NAME);
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] decode = Base64.decodeBase64(base64Data);
byte[] doFinal = cipher.doFinal(decode);
return new String(doFinal, "utf-8");
}
}