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