package com.ltkj.common.utils;
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import com.alibaba.fastjson.JSON;
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import com.alibaba.fastjson.JSONObject;
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import com.ltkj.common.utils.sign.Base64;
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import org.bouncycastle.jce.provider.BouncyCastleProvider;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import java.security.AlgorithmParameters;
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import java.security.Security;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Map;
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public class WechatUtil {
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public static JSONObject getSessionKeyOrOpenId(String code, String appid, String secret) {
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String requestUrl = "https://api.weixin.qq.com/sns/jscode2session";
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Map<String, String> requestUrlParam = new HashMap<>();
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// https://mp.weixin.qq.com/wxopen/devprofile?action=get_profile&token=164113089&lang=zh_CN
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//小程序appId
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requestUrlParam.put("appid", appid);
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//小程序secret
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requestUrlParam.put("secret", secret);
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//小程序端返回的code
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requestUrlParam.put("js_code", code);
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//默认参数
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requestUrlParam.put("grant_type", "authorization_code");
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//发送post请求读取调用微信接口获取openid用户唯一标识
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return JSON.parseObject(HttpClientUtil.doPost(requestUrl, requestUrlParam));
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}
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/**
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* 解密工具直接放进去即可
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* @return
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*/
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public static JSONObject decryptS5(String sSrc, String encodingFormat, String sKey, String ivParameter) {
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// 被加密的数据
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byte[] dataByte = Base64.decode(sSrc);
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// 加密秘钥
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byte[] keyByte = Base64.decode(sKey);
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// 偏移量
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byte[] ivByte = Base64.decode(ivParameter);
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try {
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// 如果密钥不足16位，那么就补足. 这个if 中的内容很重要
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int base = 16;
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if (keyByte.length % base != 0) {
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int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
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byte[] temp = new byte[groups * base];
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Arrays.fill(temp, (byte) 0);
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System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
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keyByte = temp;
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}
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// 初始化
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Security.addProvider(new BouncyCastleProvider());
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC");
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SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
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AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
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parameters.init(new IvParameterSpec(ivByte));
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cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化
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byte[] resultByte = cipher.doFinal(dataByte);
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if (null != resultByte && resultByte.length > 0) {
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String result = new String(resultByte, "UTF-8");
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return JSONObject.parseObject(result);
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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}
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