Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
weixin-java-common/src/main/java/me/chanjar/weixin/common/util/crypto/WxCryptUtil.java
### 代码内容：
package me.chanjar.weixin.common.util.crypto;

import java.io.StringReader;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Random;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.commons.codec.binary.Base64;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.InputSource;

public class WxCryptUtil {

  private static final Base64 BASE64 = new Base64();
  private static final Charset CHARSET = StandardCharsets.UTF_8;

  private static final ThreadLocal<DocumentBuilder> BUILDER_LOCAL = new ThreadLocal<DocumentBuilder>() {
    @Override
    protected DocumentBuilder initialValue() {
      try {
        final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setExpandEntityReferences(false);
        return factory.newDocumentBuilder();
      } catch (ParserConfigurationException exc) {
        throw new IllegalArgumentException(exc);
      }
    }
  };

  protected byte[] aesKey;
  protected String token;
  protected String appidOrCorpid;

  public WxCryptUtil() {
  }

  /**
   * 构造函数
   *
   * @param token          公众平台上，开发者设置的token
   * @param encodingAesKey 公众平台上，开发者设置的EncodingAESKey
   * @param appidOrCorpid  公众平台appid/corpid
   */
  public WxCryptUtil(String token, String encodingAesKey,
                     String appidOrCorpid) {
    this.token = token;
    this.appidOrCorpid = appidOrCorpid;
    this.aesKey = Base64.decodeBase64(encodingAesKey + "=");
  }

  static String extractEncryptPart(String xml) {
    try {
      DocumentBuilder db = BUILDER_LOCAL.get();
      Document document = db.parse(new InputSource(new StringReader(xml)));

      Element root = document.getDocumentElement();
      return root.getElementsByTagName("Encrypt").item(0).getTextContent();
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * 将一个数字转换成生成4个字节的网络字节序bytes数组
   */
  private static byte[] number2BytesInNetworkOrder(int number) {
    byte[] orderBytes = new byte[4];
    orderBytes[3] = (byte) (number & 0xFF);
    orderBytes[2] = (byte) (number >> 8 & 0xFF);
    orderBytes[1] = (byte) (number >> 16 & 0xFF);
    orderBytes[0] = (byte) (number >> 24 & 0xFF);
    return orderBytes;
  }

  /**
   * 4个字节的网络字节序bytes数组还原成一个数字
   */
  private static int bytesNetworkOrder2Number(byte[] bytesInNetworkOrder) {
    int sourceNumber = 0;
    for (int i = 0; i < 4; i++) {
      sourceNumber <<= 8;
      sourceNumber |= bytesInNetworkOrder[i] & 0xff;
    }
    return sourceNumber;
  }

  /**
   * 随机生成16位字符串
   */
  private static String genRandomStr() {
    String base = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
    Random random = new Random();
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < 16; i++) {
      int number = random.nextInt(base.length());
      sb.append(base.charAt(number));
    }
    return sb.toString();
  }

  /**
   * 生成xml消息
   *
   * @param encrypt   加密后的消息密文
   * @param signature 安全签名
   * @param timestamp 时间戳
   * @param nonce     随机字符串
   * @return 生成的xml字符串
   */
  private static String generateXml(String encrypt, String signature,
                                    String timestamp, String nonce) {
    String format = "<xml>\n" + "<Encrypt><![CDATA[%1$s]]></Encrypt>\n"
      + "<MsgSignature><![CDATA[%2$s]]></MsgSignature>\n"
      + "<TimeStamp>%3$s</TimeStamp>\n" + "<Nonce><![CDATA[%4$s]]></Nonce>\n"
      + "</xml>";
    return String.format(format, encrypt, signature, timestamp, nonce);
  }

  /**
   * 将公众平台回复用户的消息加密打包.
   *

   *
对要发送的消息进行AES-CBC加密

   *
生成安全签名

   *
将消息密文和安全签名打包成xml格式

   *

   *
   * @param plainText 公众平台待回复用户的消息，xml格式的字符串
   * @return 加密后的可以直接回复用户的密文，包括msg_signature, timestamp, nonce, encrypt的xml格式的字符串
   */
  public String encrypt(String plainText) {
    // 加密
    String encryptedXml = encrypt(genRandomStr(), plainText);

    // 生成安全签名
    String timeStamp = Long.toString(System.currentTimeMillis() / 1000L);
    String nonce = genRandomStr();

    String signature = SHA1.gen(this.token, timeStamp, nonce, encryptedXml);
    return generateXml(encryptedXml, signature, timeStamp, nonce);
  }

  /**
   * 对明文进行加密.
   *
   * @param plainText 需要加密的明文
   * @return 加密后base64编码的字符串
   */
  protected String encrypt(String randomStr, String plainText) {
    ByteGroup byteCollector = new ByteGroup();
    byte[] randomStringBytes = randomStr.getBytes(CHARSET);
    byte[] plainTextBytes = plainText.getBytes(CHARSET);
    byte[] bytesOfSizeInNetworkOrder = number2BytesInNetworkOrder(plainTextBytes.length);
    byte[] appIdBytes = this.appidOrCorpid.getBytes(CHARSET);

    // randomStr + networkBytesOrder + text + appid
    byteCollector.addBytes(randomStringBytes);
    byteCollector.addBytes(bytesOfSizeInNetworkOrder);
    byteCollector.addBytes(plainTextBytes);
    byteCollector.addBytes(appIdBytes);

    // ... + pad: 使用自定义的填充方式对明文进行补位填充
    byte[] padBytes = PKCS7Encoder.encode(byteCollector.size());
    byteCollector.addBytes(padBytes);

    // 获得最终的字节流, 未加密
    byte[] unencrypted = byteCollector.toBytes();

    try {
      // 设置加密模式为AES的CBC模式
      Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
      SecretKeySpec keySpec = new SecretKeySpec(this.aesKey, "AES");
      IvParameterSpec iv = new IvParameterSpec(this.aesKey, 0, 16);
      cipher.init(Cipher.ENCRYPT_MODE, keySpec, iv);

      // 加密
      byte[] encrypted = cipher.doFinal(unencrypted);

      // 使用BASE64对加密后的字符串进行编码
      return BASE64.encodeToString(encrypted);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * 检验消息的真实性，并且获取解密后的明文.
   *

   *
利用收到的密文生成安全签名，进行签名验证

   *
若验证通过，则提取xml中的加密消息

   *
对消息进行解密

   *

   *
   * @param msgSignature 签名串，对应URL参数的msg_signature
   * @param timeStamp    时间戳，对应URL参数的timestamp
   * @param nonce        随机串，对应URL参数的nonce
   * @param encryptedXml 密文，对应POST请求的数据
   * @return 解密后的原文
   */
  public String decrypt(String msgSignature, String timeStamp, String nonce, String encryptedXml) {
    // 密钥，公众账号的app corpSecret
    // 提取密文
    String cipherText = extractEncryptPart(encryptedXml);

    // 验证安全签名
    String signature = SHA1.gen(this.token, timeStamp, nonce, cipherText);
    if (!signature.equals(msgSignature)) {
      throw new RuntimeException("加密消息签名校验失败");
    }

    // 解密
    return decrypt(cipherText);
  }

  /**
   * 对密文进行解密.
   *
   * @param cipherText 需要解密的密文
   * @return 解密得到的明文
   */
  public String decrypt(String cipherText) {
    byte[] original;
    try {
      // 设置解密模式为AES的CBC模式
      Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
      SecretKeySpec key_spec = new SecretKeySpec(this.aesKey, "AES");
      IvParameterSpec iv = new IvParameterSpec(
        Arrays.copyOfRange(this.aesKey, 0, 16));
      cipher.init(Cipher.DECRYPT_MODE, key_spec, iv);

      // 使用BASE64对密文进行解码
      byte[] encrypted = Base64.decodeBase64(cipherText);

      // 解密
      original = cipher.doFinal(encrypted);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }

    String xmlContent, fromAppid;
    try {
      // 去除补位字符
      byte[] bytes = PKCS7Encoder.decode(original);

      // 分离16位随机字符串,网络字节序和AppId
      byte[] networkOrder = Arrays.copyOfRange(bytes, 16, 20);

      int xmlLength = bytesNetworkOrder2Number(networkOrder);

      xmlContent = new String(Arrays.copyOfRange(bytes, 20, 20 + xmlLength),
        CHARSET);
      fromAppid = new String(
        Arrays.copyOfRange(bytes, 20 + xmlLength, bytes.length), CHARSET);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }

    // appid不相同的情况
    if (!fromAppid.equals(this.appidOrCorpid)) {
      throw new RuntimeException("AppID不正确");
    }

    return xmlContent;

  }

}

## 内容2
### 文件路径：
weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/BaseWxPayResult.java
### 代码内容：
package com.github.binarywang.wxpay.bean.result;

import java.io.ByteArrayInputStream;
import java.io.Serializable;
import java.math.BigDecimal;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Map;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

import com.github.binarywang.wxpay.constant.WxPayConstants;
import com.github.binarywang.wxpay.exception.WxPayException;
import com.github.binarywang.wxpay.service.WxPayService;
import com.github.binarywang.wxpay.util.SignUtils;
import com.google.common.base.Joiner;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.annotations.XStreamAlias;
import lombok.Data;
import me.chanjar.weixin.common.util.json.WxGsonBuilder;
import me.chanjar.weixin.common.util.xml.XStreamInitializer;

/**
 *

 * 微信支付结果共用属性类.
 * Created by Binary Wang on 2016-10-24.
 *

 *
 * @author Binary Wang
 */
@Data
public abstract class BaseWxPayResult implements Serializable {
  /**
   * 返回状态码.
   */
  @XStreamAlias("return_code")
  protected String returnCode;
  /**
   * 返回信息.
   */
  @XStreamAlias("return_msg")
  protected String returnMsg;

  //当return_code为SUCCESS的时候，还会包括以下字段：

  /**
   * 业务结果.
   */
  @XStreamAlias("result_code")
  private String resultCode;
  /**
   * 错误代码.
   */
  @XStreamAlias("err_code")
  private String errCode;
  /**
   * 错误代码描述.
   */
  @XStreamAlias("err_code_des")
  private String errCodeDes;
  /**
   * 公众账号ID.
   */
  @XStreamAlias("appid")
  private String appid;
  /**
   * 商户号.
   */
  @XStreamAlias("mch_id")
  private String mchId;
  /**
   * 服务商模式下的子公众账号ID.
   */
  @XStreamAlias("sub_appid")
  private String subAppId;
  /**
   * 服务商模式下的子商户号.
   */
  @XStreamAlias("sub_mch_id")
  private String subMchId;
  /**
   * 随机字符串.
   */
  @XStreamAlias("nonce_str")
  private String nonceStr;
  /**
   * 签名.
   */
  @XStreamAlias("sign")
  private String sign;

  //以下为辅助属性
  /**
   * xml字符串.
   */
  private String xmlString;

  /**
   * xml的Document对象，用于解析xml文本.
   */
  private Document xmlDoc;

  /**
   * 将单位分转换成单位圆.
   *
   * @param fen 将要被转换为元的分的数值
   * @return the string
   */
  public static String fenToYuan(Integer fen) {
    return BigDecimal.valueOf(Double.valueOf(fen) / 100).setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString();
  }

  /**
   * 从xml字符串创建bean对象.
   *
   * @param <T>       the type parameter
   * @param xmlString the xml string
   * @param clz       the clz
   * @return the t
   */
  public static <T extends BaseWxPayResult> T fromXML(String xmlString, Class<T> clz) {
    XStream xstream = XStreamInitializer.getInstance();
    xstream.processAnnotations(clz);
    T result = (T) xstream.fromXML(xmlString);
    result.setXmlString(xmlString);
    return result;
  }

  /**
   * Gets logger.
   *
   * @return the logger
   */
  protected Logger getLogger() {
    return LoggerFactory.getLogger(this.getClass());
  }

  @Override
  public String toString() {
    return WxGsonBuilder.create().toJson(this);
  }

  /**
   * 将bean通过保存的xml字符串转换成map.
   *
   * @return the map
   */
  public Map<String, String> toMap() {
    if (StringUtils.isBlank(this.xmlString)) {
      throw new RuntimeException("xml数据有问题，请核实！");
    }

    Map<String, String> result = Maps.newHashMap();
    Document doc = this.getXmlDoc();

    try {
      NodeList list = (NodeList) XPathFactory.newInstance().newXPath()
        .compile("/xml/*")
        .evaluate(doc, XPathConstants.NODESET);
      int len = list.getLength();
      for (int i = 0; i < len; i++) {
        result.put(list.item(i).getNodeName(), list.item(i).getTextContent());
      }
    } catch (XPathExpressionException e) {
      throw new RuntimeException("非法的xml文本内容：" + xmlString);
    }

    return result;
  }

  /**
   * 将xml字符串转换成Document对象，以便读取其元素值.
   */
  private Document getXmlDoc() {
    if (this.xmlDoc != null) {
      return this.xmlDoc;
    }

    try {
      final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
      factory.setExpandEntityReferences(false);
      this.xmlDoc = factory.newDocumentBuilder()
        .parse(new ByteArrayInputStream(this.xmlString.getBytes(StandardCharsets.UTF_8)));
      return xmlDoc;
    } catch (Exception e) {
      throw new RuntimeException("非法的xml文本内容：\n" + this.xmlString, e);
    }

  }

  /**
   * 获取xml中元素的值.
   *
   * @param path the path
   * @return the xml value
   */
  String getXmlValue(String... path) {
    Document doc = this.getXmlDoc();
    String expression = String.format("/%s//text()", Joiner.on("/").join(path));
    try {
      return (String) XPathFactory
        .newInstance()
        .newXPath()
        .compile(expression)
        .evaluate(doc, XPathConstants.STRING);
    } catch (XPathExpressionException e) {
      throw new RuntimeException("未找到相应路径的文本：" + expression);
    }
  }

  /**
   * 获取xml中元素的值，作为int值返回.
   *
   * @param path the path
   * @return the xml value as int
   */
  Integer getXmlValueAsInt(String... path) {
    String result = this.getXmlValue(path);
    if (StringUtils.isBlank(result)) {
      return null;
    }

    return Integer.valueOf(result);
  }

  /**
   * 校验返回结果签名.
   *
   * @param wxPayService the wx pay service
   * @param signType     签名类型
   * @param checkSuccess 是否同时检查结果是否成功
   * @throws WxPayException the wx pay exception
   */
  public void checkResult(WxPayService wxPayService, String signType, boolean checkSuccess) throws WxPayException {
    //校验返回结果签名
    Map<String, String> map = toMap();
    if (getSign() != null && !SignUtils.checkSign(map, signType, wxPayService.getConfig().getMchKey())) {
      this.getLogger().debug("校验结果签名失败，参数：{}", map);
      throw new WxPayException("参数格式校验错误！");
    }

    //校验结果是否成功
    if (checkSuccess) {
      List<String> successStrings = Lists.newArrayList(WxPayConstants.ResultCode.SUCCESS, "");
      if (!successStrings.contains(StringUtils.trimToEmpty(getReturnCode()).toUpperCase())
        || !successStrings.contains(StringUtils.trimToEmpty(getResultCode()).toUpperCase())) {
        StringBuilder errorMsg = new StringBuilder();
        if (getReturnCode() != null) {
          errorMsg.append("返回代码：").append(getReturnCode());
        }
        if (getReturnMsg() != null) {
          errorMsg.append("，返回信息：").append(getReturnMsg());
        }
        if (getResultCode() != null) {
          errorMsg.append("，结果代码：").append(getResultCode());
        }
        if (getErrCode() != null) {
          errorMsg.append("，错误代码：").append(getErrCode());
        }
        if (getErrCodeDes() != null) {
          errorMsg.append("，错误详情：").append(getErrCodeDes());
        }

        this.getLogger().error("\n结果业务代码异常，返回结果：{},\n{}", map, errorMsg.toString());
        throw WxPayException.from(this);
      }
    }
  }
}