高位漏洞修改
zhangshengli
1 year ago
parent
2a1078a9ae
commit
bce113666c
@ -0,0 +1,109 @@
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package com.fuint.common.filter;
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import com.alipay.api.internal.util.file.Charsets;
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import javax.servlet.ReadListener;
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import javax.servlet.ServletInputStream;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletRequestWrapper;
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import java.io.*;
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import java.util.Enumeration;
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import java.util.Map;
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/**
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* <p> @Title MyRequestWrapper
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* <p> @Description 用于过滤器中获取POST请求参数
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*
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* @author zhj
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* @date 2021/10/28 9:52
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*/
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public class MyRequestWrapper extends HttpServletRequestWrapper {
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private String body;
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public MyRequestWrapper(HttpServletRequest request) throws IOException {
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super(request);
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StringBuilder stringBuilder = new StringBuilder();
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BufferedReader bufferedReader = null;
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try {
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InputStream inputStream = request.getInputStream();
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if (inputStream != null) {
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bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"UTF-8"));
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char[] charBuffer = new char[128];
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int bytesRead = -1;
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while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {
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stringBuilder.append(charBuffer, 0, bytesRead);
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}
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} else {
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stringBuilder.append("");
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}
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} catch (IOException ex) {
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throw ex;
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} finally {
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if (bufferedReader != null) {
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try {
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bufferedReader.close();
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} catch (IOException ex) {
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throw ex;
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}
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}
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}
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body = stringBuilder.toString();
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}
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@Override
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public ServletInputStream getInputStream() throws IOException {
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final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(body.getBytes("UTF-8"));
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ServletInputStream servletInputStream = new ServletInputStream() {
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@Override
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public boolean isFinished() {
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return false;
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}
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@Override
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public boolean isReady() {
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return false;
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}
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@Override
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public void setReadListener(ReadListener readListener) {
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}
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@Override
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public int read() {
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return byteArrayInputStream.read();
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}
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};
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return servletInputStream;
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}
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@Override
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public BufferedReader getReader() throws IOException {
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return new BufferedReader(new InputStreamReader(this.getInputStream(), Charsets.UTF_8));
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}
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public String getBody() {
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return this.body;
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}
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@Override
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public String getParameter(String name) {
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return super.getParameter(name);
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}
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@Override
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public Map<String, String[]> getParameterMap() {
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return super.getParameterMap();
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}
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@Override
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public Enumeration<String> getParameterNames() {
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return super.getParameterNames();
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}
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@Override
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public String[] getParameterValues(String name) {
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return super.getParameterValues(name);
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}
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}
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@ -0,0 +1,101 @@
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package com.fuint.common.filter;
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import cn.hutool.core.util.ObjectUtil;
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import com.alibaba.fastjson2.JSONObject;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fuint.framework.exception.BusinessRuntimeException;
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import org.apache.commons.lang3.StringUtils;
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import org.springframework.web.multipart.support.StandardServletMultipartResolver;
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import javax.servlet.*;
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import javax.servlet.annotation.WebFilter;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.util.Map;
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import java.util.Set;
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import java.util.TreeMap;
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import java.util.stream.Collectors;
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@WebFilter(filterName = "CharsetFilter",urlPatterns = "/*")
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public class SpecialCharFilter implements Filter {
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private static final String SQL_REGX = "[\\\\^$*+?{}()=&;%+\\[\\].|]";
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@Override
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public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException, IOException {
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HttpServletRequest req = (HttpServletRequest) servletRequest;
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// 防止流读取一次后就没有了, 所以需要将流继续写出去
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MyRequestWrapper requestWrapper = new MyRequestWrapper(req);
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// 获取请求参数
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Map<String, Object> paramsMaps = new TreeMap<>();
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if ("POST".equals(req.getMethod().toUpperCase())) {
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String body = requestWrapper.getBody();
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paramsMaps = JSONObject.parseObject(body, TreeMap.class);
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} else {
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Map<String, String[]> parameterMap = requestWrapper.getParameterMap();
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Set<Map.Entry<String, String[]>> entries = parameterMap.entrySet();
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for (Map.Entry<String, String[]> next : entries) {
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paramsMaps.put(next.getKey(), next.getValue()[0]);
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}
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}
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// 校验SQL注入
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if (ObjectUtil.isNotEmpty(paramsMaps)) {
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for (Object o : paramsMaps.entrySet()) {
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Map.Entry entry = (Map.Entry) o;
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Object value = entry.getValue();
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if (value != null) {
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boolean isValid = checkSqlInject(value.toString(), servletResponse);
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if (!isValid) {
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return;
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}
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}
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}
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}
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chain.doFilter(requestWrapper, servletResponse);
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}
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//获取request请求body中参数
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public static String getBodyString(BufferedReader br) {
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String inputLine;
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String str = "";
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try {
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while ((inputLine = br.readLine()) != null) {
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str += inputLine;
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}
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br.close();
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} catch (IOException e) {
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System.out.println("IOException: " + e);
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}
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return str;
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}
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/**
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* 检查SQL注入
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*
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* @param value 参数值
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* @param servletResponse 相应实例
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* @throws IOException IO异常
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*/
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private boolean checkSqlInject(String value, ServletResponse servletResponse) throws IOException {
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if (null != value) {
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String output = value.replaceAll(SQL_REGX, "");
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if (output.length()<value.length()) {
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return false;
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}
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}
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return true;
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}
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}
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