sql注入、xss注入
This commit is contained in:
TS-QD1
parent
faef13de64
commit
7057227573
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package cn.com.tenlion.xzszwhy.config.filter;
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import cn.com.tenlion.xzszwhy.config.filter.sqlinject.SqlInjectFilter;
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import cn.com.tenlion.xzszwhy.config.filter.xss.XssFilter;
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import org.springframework.boot.web.servlet.FilterRegistrationBean;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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@Configuration
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public class FilterConfig {
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@Bean
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public FilterRegistrationBean xssFilterRegistration() {
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FilterRegistrationBean registration = new FilterRegistrationBean();
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registration.setFilter(new XssFilter());
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registration.addUrlPatterns("/api/*");//过滤所有路径
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registration.setName("xssFilter");//过滤器名称
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registration.setOrder(Integer.MAX_VALUE);//优先级，越低越优先
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return registration;
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}
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@Bean
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public FilterRegistrationBean sqlInjectFilterRegistration() {
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FilterRegistrationBean registration = new FilterRegistrationBean();
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registration.setFilter(new SqlInjectFilter());
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registration.addUrlPatterns("/api/*", "/app/*");//过滤所有路径
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registration.setName("sqlInjectFilter");//过滤器名称
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registration.setOrder(Integer.MAX_VALUE);//优先级，越低越优先
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return registration;
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}
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}
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package cn.com.tenlion.xzszwhy.config.filter.sqlinject;
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import com.alibaba.excel.util.StringUtils;
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import javax.servlet.*;
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import javax.servlet.http.HttpServletRequest;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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public class SqlInjectFilter implements Filter {
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private List<String> excludedList = new ArrayList<String>();
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@Override
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public void init(FilterConfig config) throws ServletException {
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/*
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* 这里只处理了不拦截的url地址，如果想不拦截某个字段，比如富文本字段，
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* 需要自己在XssHttpServletRequestWrapper类中去添加逻辑
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*/
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excludedList.add("/test/excluded1");
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excludedList.add("/test/excluded2");
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}
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@Override
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public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
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SqlInjectHttpServletRequestWrapper sqlInjectHttpServletRequestWrapper = new SqlInjectHttpServletRequestWrapper((HttpServletRequest) request);
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String url = sqlInjectHttpServletRequestWrapper.getServletPath();
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if (isExcluded(url)) {
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chain.doFilter(request, response);
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} else {
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// 使用SQL过滤
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chain.doFilter(sqlInjectHttpServletRequestWrapper, response);
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}
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}
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private boolean isExcluded(String url) {
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if (StringUtils.isBlank(url)) {
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return false;
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}
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for (String excluded : excludedList) {
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if (url.contains(excluded)) {
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return true;
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}
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}
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return false;
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}
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}
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package cn.com.tenlion.xzszwhy.config.filter.sqlinject;
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import com.alibaba.excel.util.StringUtils;
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import org.apache.commons.io.IOUtils;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.MediaType;
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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.ByteArrayInputStream;
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import java.io.IOException;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class SqlInjectHttpServletRequestWrapper extends HttpServletRequestWrapper {
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private static final Pattern SQL_REGX = Pattern.compile("(select|update|and|or|delete|insert|trancate|char|into|substr|ascii|declare|exec|count|master|drop|execute)", Pattern.CASE_INSENSITIVE);
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public SqlInjectHttpServletRequestWrapper(HttpServletRequest request) {
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super(request);
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}
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@Override
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public ServletInputStream getInputStream() throws IOException {
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String contentType = super.getHeader(HttpHeaders.CONTENT_TYPE);
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//非json类型，直接返回
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if (!(MediaType.APPLICATION_JSON_VALUE.
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equalsIgnoreCase(contentType) ||
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MediaType.APPLICATION_JSON_UTF8_VALUE.
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equalsIgnoreCase(contentType))) {
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return super.getInputStream();
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}
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//为空，直接返回
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String json = IOUtils.toString(super.getInputStream(), "utf-8");
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if (StringUtils.isBlank(json)) {
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return super.getInputStream();
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}
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//xss过滤
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json = clearSqlInject(json);
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final ByteArrayInputStream bis =
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new ByteArrayInputStream(json.getBytes("utf-8"));
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return new ServletInputStream() {
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@Override
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public boolean isFinished() {
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return true;
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}
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@Override
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public boolean isReady() {
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return true;
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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() throws IOException {
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return bis.read();
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}
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};
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}
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private String clearSqlInject(String value) {
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String result = value;
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Matcher matcher = SQL_REGX.matcher(value);
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if (matcher.find()) {
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result = result.replaceAll(matcher.group(), "");
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result = clearSqlInject(result);
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}
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return result;
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}
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}
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package cn.com.tenlion.xzszwhy.config.filter.xss;
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import java.util.*;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentMap;
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import java.util.logging.Logger;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class HTMLFilter {
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/**
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* regex flag union representing /si modifiers in php
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**/
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private static final int REGEX_FLAGS_SI = Pattern.CASE_INSENSITIVE | Pattern.DOTALL;
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private static final Pattern P_COMMENTS = Pattern.compile("<!--(.*?)-->", Pattern.DOTALL);
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private static final Pattern P_COMMENT = Pattern.compile("^!--(.*)--$", REGEX_FLAGS_SI);
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private static final Pattern P_TAGS = Pattern.compile("<(.*?)>", Pattern.DOTALL);
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private static final Pattern P_END_TAG = Pattern.compile("^/([a-z0-9]+)", REGEX_FLAGS_SI);
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private static final Pattern P_START_TAG = Pattern.compile("^([a-z0-9]+)(.*?)(/?)$", REGEX_FLAGS_SI);
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private static final Pattern P_QUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)=([\"'])(.*?)\\2", REGEX_FLAGS_SI);
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private static final Pattern P_UNQUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)(=)([^\"\\s']+)", REGEX_FLAGS_SI);
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private static final Pattern P_PROTOCOL = Pattern.compile("^([^:]+):", REGEX_FLAGS_SI);
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private static final Pattern P_ENTITY = Pattern.compile("&#(\\d+);?");
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private static final Pattern P_ENTITY_UNICODE = Pattern.compile("&#x([0-9a-f]+);?");
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private static final Pattern P_ENCODE = Pattern.compile("%([0-9a-f]{2});?");
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private static final Pattern P_VALID_ENTITIES = Pattern.compile("&([^&;]*)(?=(;|&|$))");
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private static final Pattern P_VALID_QUOTES = Pattern.compile("(>|^)([^<]+?)(<|$)", Pattern.DOTALL);
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private static final Pattern P_END_ARROW = Pattern.compile("^>");
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private static final Pattern P_BODY_TO_END = Pattern.compile("<([^>]*?)(?=<|$)");
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private static final Pattern P_XML_CONTENT = Pattern.compile("(^|>)([^<]*?)(?=>)");
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private static final Pattern P_STRAY_LEFT_ARROW = Pattern.compile("<([^>]*?)(?=<|$)");
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private static final Pattern P_STRAY_RIGHT_ARROW = Pattern.compile("(^|>)([^<]*?)(?=>)");
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private static final Pattern P_AMP = Pattern.compile("&");
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private static final Pattern P_QUOTE = Pattern.compile("\"");
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private static final Pattern P_LEFT_ARROW = Pattern.compile("<");
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private static final Pattern P_RIGHT_ARROW = Pattern.compile(">");
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private static final Pattern P_BOTH_ARROWS = Pattern.compile("<>");
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private static final Pattern P_DOUBLE_QUOT = Pattern.compile(""");
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// @xxx could grow large... maybe use sesat's ReferenceMap
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private static final ConcurrentMap<String, Pattern> P_REMOVE_PAIR_BLANKS = new ConcurrentHashMap<String, Pattern>();
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private static final ConcurrentMap<String, Pattern> P_REMOVE_SELF_BLANKS = new ConcurrentHashMap<String, Pattern>();
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/**
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* set of allowed html elements, along with allowed attributes for each element
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**/
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private final Map<String, List<String>> vAllowed;
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/**
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* counts of open tags for each (allowable) html element
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**/
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private final Map<String, Integer> vTagCounts = new HashMap<String, Integer>();
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/**
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* html elements which must always be self-closing (e.g. "<img />")
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**/
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private final String[] vSelfClosingTags;
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/**
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* html elements which must always have separate opening and closing tags (e.g. "<b></b>")
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**/
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private final String[] vNeedClosingTags;
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/**
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* set of disallowed html elements
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**/
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private final String[] vDisallowed;
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/**
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* attributes which should be checked for valid protocols
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**/
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private final String[] vProtocolAtts;
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/**
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* allowed protocols
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**/
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private final String[] vAllowedProtocols;
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/**
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* tags which should be removed if they contain no content (e.g. "<b></b>" or "<b />")
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**/
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private final String[] vRemoveBlanks;
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/**
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* entities allowed within html markup
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**/
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private final String[] vAllowedEntities;
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/**
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* flag determining whether comments are allowed in input String.
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*/
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private final boolean stripComment;
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private final boolean encodeQuotes;
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private boolean vDebug = false;
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/**
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* flag determining whether to try to make tags when presented with "unbalanced"
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* angle brackets (e.g. "<b text </b>" becomes "<b> text </b>"). If set to false,
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* unbalanced angle brackets will be html escaped.
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*/
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private final boolean alwaysMakeTags;
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/**
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* Default constructor.
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*/
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public HTMLFilter() {
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vAllowed = new HashMap<>();
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final ArrayList<String> a_atts = new ArrayList<String>();
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a_atts.add("href");
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a_atts.add("target");
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vAllowed.put("a", a_atts);
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final ArrayList<String> img_atts = new ArrayList<String>();
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img_atts.add("src");
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img_atts.add("width");
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img_atts.add("height");
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img_atts.add("alt");
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vAllowed.put("img", img_atts);
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final ArrayList<String> no_atts = new ArrayList<String>();
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vAllowed.put("b", no_atts);
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vAllowed.put("strong", no_atts);
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vAllowed.put("i", no_atts);
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vAllowed.put("em", no_atts);
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vSelfClosingTags = new String[]{"img"};
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vNeedClosingTags = new String[]{"a", "b", "strong", "i", "em"};
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vDisallowed = new String[]{};
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vAllowedProtocols = new String[]{"http", "mailto", "https"}; // no ftp.
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vProtocolAtts = new String[]{"src", "href"};
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vRemoveBlanks = new String[]{"a", "b", "strong", "i", "em"};
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vAllowedEntities = new String[]{"amp", "gt", "lt", "quot"};
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stripComment = true;
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encodeQuotes = true;
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alwaysMakeTags = true;
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}
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/**
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* Set debug flag to true. Otherwise use default settings. See the default constructor.
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*
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* @param debug turn debug on with a true argument
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*/
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public HTMLFilter(final boolean debug) {
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this();
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vDebug = debug;
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}
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/**
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* Map-parameter configurable constructor.
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*
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* @param conf map containing configuration. keys match field names.
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*/
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public HTMLFilter(final Map<String, Object> conf) {
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assert conf.containsKey("vAllowed") : "configuration requires vAllowed";
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assert conf.containsKey("vSelfClosingTags") : "configuration requires vSelfClosingTags";
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assert conf.containsKey("vNeedClosingTags") : "configuration requires vNeedClosingTags";
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assert conf.containsKey("vDisallowed") : "configuration requires vDisallowed";
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assert conf.containsKey("vAllowedProtocols") : "configuration requires vAllowedProtocols";
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assert conf.containsKey("vProtocolAtts") : "configuration requires vProtocolAtts";
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assert conf.containsKey("vRemoveBlanks") : "configuration requires vRemoveBlanks";
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assert conf.containsKey("vAllowedEntities") : "configuration requires vAllowedEntities";
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vAllowed = Collections.unmodifiableMap((HashMap<String, List<String>>) conf.get("vAllowed"));
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vSelfClosingTags = (String[]) conf.get("vSelfClosingTags");
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vNeedClosingTags = (String[]) conf.get("vNeedClosingTags");
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vDisallowed = (String[]) conf.get("vDisallowed");
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vAllowedProtocols = (String[]) conf.get("vAllowedProtocols");
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vProtocolAtts = (String[]) conf.get("vProtocolAtts");
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vRemoveBlanks = (String[]) conf.get("vRemoveBlanks");
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vAllowedEntities = (String[]) conf.get("vAllowedEntities");
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stripComment = conf.containsKey("stripComment") ? (Boolean) conf.get("stripComment") : true;
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encodeQuotes = conf.containsKey("encodeQuotes") ? (Boolean) conf.get("encodeQuotes") : true;
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alwaysMakeTags = conf.containsKey("alwaysMakeTags") ? (Boolean) conf.get("alwaysMakeTags") : true;
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}
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private void reset() {
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vTagCounts.clear();
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}
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private void debug(final String msg) {
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if (vDebug) {
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Logger.getAnonymousLogger().info(msg);
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}
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}
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//---------------------------------------------------------------
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// my versions of some PHP library functions
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public static String chr(final int decimal) {
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return String.valueOf((char) decimal);
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}
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public static String htmlSpecialChars(final String s) {
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String result = s;
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result = regexReplace(P_AMP, "&", result);
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result = regexReplace(P_QUOTE, """, result);
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result = regexReplace(P_LEFT_ARROW, "<", result);
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result = regexReplace(P_RIGHT_ARROW, ">", result);
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return result;
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}
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//---------------------------------------------------------------
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/**
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* given a user submitted input String, filter out any invalid or restricted
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* html.
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*
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* @param input text (i.e. submitted by a user) than may contain html
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* @return "clean" version of input, with only valid, whitelisted html elements allowed
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*/
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public String filter(final String input) {
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reset();
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String s = input;
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debug("************************************************");
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debug(" INPUT: " + input);
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s = escapeComments(s);
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debug(" escapeComments: " + s);
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s = balanceHTML(s);
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debug(" balanceHTML: " + s);
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s = checkTags(s);
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debug(" checkTags: " + s);
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s = processRemoveBlanks(s);
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debug("processRemoveBlanks: " + s);
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s = validateEntities(s);
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debug(" validateEntites: " + s);
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debug("************************************************\n\n");
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return s;
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}
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public boolean isAlwaysMakeTags() {
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return alwaysMakeTags;
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}
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public boolean isStripComments() {
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return stripComment;
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}
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private String escapeComments(final String s) {
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final Matcher m = P_COMMENTS.matcher(s);
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final StringBuffer buf = new StringBuffer();
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if (m.find()) {
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final String match = m.group(1); //(.*?)
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m.appendReplacement(buf, Matcher.quoteReplacement("<!--" + htmlSpecialChars(match) + "-->"));
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}
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m.appendTail(buf);
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return buf.toString();
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}
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private String balanceHTML(String s) {
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if (alwaysMakeTags) {
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//
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// try and form html
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//
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s = regexReplace(P_END_ARROW, "", s);
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s = regexReplace(P_BODY_TO_END, "<$1>", s);
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s = regexReplace(P_XML_CONTENT, "$1<$2", s);
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} else {
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//
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// escape stray brackets
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//
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s = regexReplace(P_STRAY_LEFT_ARROW, "<$1", s);
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s = regexReplace(P_STRAY_RIGHT_ARROW, "$1$2><", s);
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//
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// the last regexp causes '<>' entities to appear
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// (we need to do a lookahead assertion so that the last bracket can
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// be used in the next pass of the regexp)
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//
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s = regexReplace(P_BOTH_ARROWS, "", s);
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}
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return s;
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}
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private String checkTags(String s) {
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Matcher m = P_TAGS.matcher(s);
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final StringBuffer buf = new StringBuffer();
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while (m.find()) {
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String replaceStr = m.group(1);
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replaceStr = processTag(replaceStr);
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m.appendReplacement(buf, Matcher.quoteReplacement(replaceStr));
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}
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m.appendTail(buf);
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s = buf.toString();
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// these get tallied in processTag
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// (remember to reset before subsequent calls to filter method)
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for (String key : vTagCounts.keySet()) {
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for (int ii = 0; ii < vTagCounts.get(key); ii++) {
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s += "</" + key + ">";
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}
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}
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return s;
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}
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|
||||
private String processRemoveBlanks(final String s) {
|
||||
String result = s;
|
||||
for (String tag : vRemoveBlanks) {
|
||||
if (!P_REMOVE_PAIR_BLANKS.containsKey(tag)) {
|
||||
P_REMOVE_PAIR_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]*)?></" + tag + ">"));
|
||||
}
|
||||
result = regexReplace(P_REMOVE_PAIR_BLANKS.get(tag), "", result);
|
||||
if (!P_REMOVE_SELF_BLANKS.containsKey(tag)) {
|
||||
P_REMOVE_SELF_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]*)?/>"));
|
||||
}
|
||||
result = regexReplace(P_REMOVE_SELF_BLANKS.get(tag), "", result);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
private static String regexReplace(final Pattern regex_pattern, final String replacement, final String s) {
|
||||
Matcher m = regex_pattern.matcher(s);
|
||||
return m.replaceAll(replacement);
|
||||
}
|
||||
|
||||
private String processTag(final String s) {
|
||||
// ending tags
|
||||
Matcher m = P_END_TAG.matcher(s);
|
||||
if (m.find()) {
|
||||
final String name = m.group(1).toLowerCase();
|
||||
if (allowed(name)) {
|
||||
if (!inArray(name, vSelfClosingTags)) {
|
||||
if (vTagCounts.containsKey(name)) {
|
||||
vTagCounts.put(name, vTagCounts.get(name) - 1);
|
||||
return "</" + name + ">";
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// starting tags
|
||||
m = P_START_TAG.matcher(s);
|
||||
if (m.find()) {
|
||||
final String name = m.group(1).toLowerCase();
|
||||
final String body = m.group(2);
|
||||
String ending = m.group(3);
|
||||
|
||||
//debug( "in a starting tag, name='" + name + "'; body='" + body + "'; ending='" + ending + "'" );
|
||||
if (allowed(name)) {
|
||||
String params = "";
|
||||
|
||||
final Matcher m2 = P_QUOTED_ATTRIBUTES.matcher(body);
|
||||
final Matcher m3 = P_UNQUOTED_ATTRIBUTES.matcher(body);
|
||||
final List<String> paramNames = new ArrayList<String>();
|
||||
final List<String> paramValues = new ArrayList<String>();
|
||||
while (m2.find()) {
|
||||
paramNames.add(m2.group(1)); //([a-z0-9]+)
|
||||
paramValues.add(m2.group(3)); //(.*?)
|
||||
}
|
||||
while (m3.find()) {
|
||||
paramNames.add(m3.group(1)); //([a-z0-9]+)
|
||||
paramValues.add(m3.group(3)); //([^\"\\s']+)
|
||||
}
|
||||
|
||||
String paramName, paramValue;
|
||||
for (int ii = 0; ii < paramNames.size(); ii++) {
|
||||
paramName = paramNames.get(ii).toLowerCase();
|
||||
paramValue = paramValues.get(ii);
|
||||
|
||||
// debug( "paramName='" + paramName + "'" );
|
||||
// debug( "paramValue='" + paramValue + "'" );
|
||||
// debug( "allowed? " + vAllowed.get( name ).contains( paramName ) );
|
||||
|
||||
if (allowedAttribute(name, paramName)) {
|
||||
if (inArray(paramName, vProtocolAtts)) {
|
||||
paramValue = processParamProtocol(paramValue);
|
||||
}
|
||||
params += " " + paramName + "=\"" + paramValue + "\"";
|
||||
}
|
||||
}
|
||||
|
||||
if (inArray(name, vSelfClosingTags)) {
|
||||
ending = " /";
|
||||
}
|
||||
|
||||
if (inArray(name, vNeedClosingTags)) {
|
||||
ending = "";
|
||||
}
|
||||
|
||||
if (ending == null || ending.length() < 1) {
|
||||
if (vTagCounts.containsKey(name)) {
|
||||
vTagCounts.put(name, vTagCounts.get(name) + 1);
|
||||
} else {
|
||||
vTagCounts.put(name, 1);
|
||||
}
|
||||
} else {
|
||||
ending = " /";
|
||||
}
|
||||
return "<" + name + params + ending + ">";
|
||||
} else {
|
||||
return "";
|
||||
}
|
||||
}
|
||||
|
||||
// comments
|
||||
m = P_COMMENT.matcher(s);
|
||||
if (!stripComment && m.find()) {
|
||||
return "<" + m.group() + ">";
|
||||
}
|
||||
|
||||
return "";
|
||||
}
|
||||
|
||||
private String processParamProtocol(String s) {
|
||||
s = decodeEntities(s);
|
||||
final Matcher m = P_PROTOCOL.matcher(s);
|
||||
if (m.find()) {
|
||||
final String protocol = m.group(1);
|
||||
if (!inArray(protocol, vAllowedProtocols)) {
|
||||
// bad protocol, turn into local anchor link instead
|
||||
s = "#" + s.substring(protocol.length() + 1, s.length());
|
||||
if (s.startsWith("#//")) {
|
||||
s = "#" + s.substring(3, s.length());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return s;
|
||||
}
|
||||
|
||||
private String decodeEntities(String s) {
|
||||
StringBuffer buf = new StringBuffer();
|
||||
|
||||
Matcher m = P_ENTITY.matcher(s);
|
||||
while (m.find()) {
|
||||
final String match = m.group(1);
|
||||
final int decimal = Integer.decode(match).intValue();
|
||||
m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
|
||||
}
|
||||
m.appendTail(buf);
|
||||
s = buf.toString();
|
||||
|
||||
buf = new StringBuffer();
|
||||
m = P_ENTITY_UNICODE.matcher(s);
|
||||
while (m.find()) {
|
||||
final String match = m.group(1);
|
||||
final int decimal = Integer.valueOf(match, 16).intValue();
|
||||
m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
|
||||
}
|
||||
m.appendTail(buf);
|
||||
s = buf.toString();
|
||||
|
||||
buf = new StringBuffer();
|
||||
m = P_ENCODE.matcher(s);
|
||||
while (m.find()) {
|
||||
final String match = m.group(1);
|
||||
final int decimal = Integer.valueOf(match, 16).intValue();
|
||||
m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
|
||||
}
|
||||
m.appendTail(buf);
|
||||
s = buf.toString();
|
||||
|
||||
s = validateEntities(s);
|
||||
return s;
|
||||
}
|
||||
|
||||
private String validateEntities(final String s) {
|
||||
StringBuffer buf = new StringBuffer();
|
||||
|
||||
// validate entities throughout the string
|
||||
Matcher m = P_VALID_ENTITIES.matcher(s);
|
||||
while (m.find()) {
|
||||
final String one = m.group(1); //([^&;]*)
|
||||
final String two = m.group(2); //(?=(;|&|$))
|
||||
m.appendReplacement(buf, Matcher.quoteReplacement(checkEntity(one, two)));
|
||||
}
|
||||
m.appendTail(buf);
|
||||
|
||||
return encodeQuotes(buf.toString());
|
||||
}
|
||||
|
||||
private String encodeQuotes(final String s) {
|
||||
if (encodeQuotes) {
|
||||
StringBuffer buf = new StringBuffer();
|
||||
Matcher m = P_VALID_QUOTES.matcher(s);
|
||||
while (m.find()) {
|
||||
final String one = m.group(1); //(>|^)
|
||||
final String two = m.group(2); //([^<]+?)
|
||||
final String three = m.group(3); //(<|$)
|
||||
m.appendReplacement(buf, Matcher.quoteReplacement(one + regexReplace(P_QUOTE, """, two) + three));
|
||||
}
|
||||
m.appendTail(buf);
|
||||
return buf.toString();
|
||||
} else {
|
||||
return s;
|
||||
}
|
||||
}
|
||||
|
||||
private String checkEntity(final String preamble, final String term) {
|
||||
|
||||
return ";".equals(term) && isValidEntity(preamble)
|
||||
? '&' + preamble
|
||||
: "&" + preamble;
|
||||
}
|
||||
|
||||
private boolean isValidEntity(final String entity) {
|
||||
return inArray(entity, vAllowedEntities);
|
||||
}
|
||||
|
||||
private static boolean inArray(final String s, final String[] array) {
|
||||
for (String item : array) {
|
||||
if (item != null && item.equals(s)) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
private boolean allowed(final String name) {
|
||||
return (vAllowed.isEmpty() || vAllowed.containsKey(name)) && !inArray(name, vDisallowed);
|
||||
}
|
||||
|
||||
private boolean allowedAttribute(final String name, final String paramName) {
|
||||
return allowed(name) && (vAllowed.isEmpty() || vAllowed.get(name).contains(paramName));
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,64 @@
|
||||
package cn.com.tenlion.xzszwhy.config.filter.xss;
|
||||
|
||||
import com.alibaba.excel.util.StringUtils;
|
||||
|
||||
import javax.servlet.*;
|
||||
import javax.servlet.http.HttpServletRequest;
|
||||
import java.io.IOException;
|
||||
import java.util.ArrayList;
|
||||
import java.util.List;
|
||||
|
||||
public class XssFilter implements Filter {
|
||||
|
||||
//不拦截的地址
|
||||
private List<String> excludedList = new ArrayList<String>();
|
||||
|
||||
@Override
|
||||
public void init(FilterConfig config) throws ServletException {
|
||||
|
||||
/*
|
||||
* 这里只处理了不拦截的url地址，如果想不拦截某个字段，比如富文本字段，
|
||||
* 需要自己在XssHttpServletRequestWrapper类中去添加逻辑
|
||||
*/
|
||||
excludedList.add("/test/excluded1");
|
||||
excludedList.add("/test/excluded2");
|
||||
}
|
||||
|
||||
@Override
|
||||
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
|
||||
throws IOException, ServletException {
|
||||
XssHttpServletRequestWrapper xssRequest = new XssHttpServletRequestWrapper((HttpServletRequest) request);
|
||||
String url = xssRequest.getServletPath();
|
||||
if (isExcluded(url)) {
|
||||
chain.doFilter(request, response);
|
||||
} else {
|
||||
//使用XSS过滤
|
||||
chain.doFilter(xssRequest, response);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void destroy() {
|
||||
}
|
||||
|
||||
/**
|
||||
* 是否不拦截
|
||||
*
|
||||
* @param url 请求地址
|
||||
* @return true不拦截，false拦截
|
||||
*/
|
||||
private boolean isExcluded(String url) {
|
||||
if (StringUtils.isBlank(url)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
for (String excluded : excludedList) {
|
||||
if (url.contains(excluded)) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
@ -0,0 +1,152 @@
|
||||
package cn.com.tenlion.xzszwhy.config.filter.xss;
|
||||
|
||||
import com.alibaba.excel.util.StringUtils;
|
||||
import org.apache.commons.io.IOUtils;
|
||||
import org.apache.commons.text.StringEscapeUtils;
|
||||
import org.springframework.http.HttpHeaders;
|
||||
import org.springframework.http.MediaType;
|
||||
|
||||
import javax.servlet.ReadListener;
|
||||
import javax.servlet.ServletInputStream;
|
||||
import javax.servlet.http.HttpServletRequest;
|
||||
import javax.servlet.http.HttpServletRequestWrapper;
|
||||
import java.io.ByteArrayInputStream;
|
||||
import java.io.IOException;
|
||||
import java.util.LinkedHashMap;
|
||||
import java.util.Map;
|
||||
|
||||
public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {
|
||||
|
||||
// 没被包装过的HttpServletRequest（特殊场景，需求自己过滤）
|
||||
HttpServletRequest orgRequest;
|
||||
// html过滤
|
||||
private final static HTMLFilter htmlFilter = new HTMLFilter();
|
||||
|
||||
public XssHttpServletRequestWrapper(HttpServletRequest request) {
|
||||
super(request);
|
||||
orgRequest = request;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* 过滤json参数
|
||||
*/
|
||||
@Override
|
||||
public ServletInputStream getInputStream() throws IOException {
|
||||
String contentType = super.getHeader(HttpHeaders.CONTENT_TYPE);
|
||||
//非json类型，直接返回
|
||||
if(!(MediaType.APPLICATION_JSON_VALUE.
|
||||
equalsIgnoreCase(contentType) ||
|
||||
MediaType.APPLICATION_JSON_UTF8_VALUE.
|
||||
equalsIgnoreCase(contentType))){
|
||||
return super.getInputStream();
|
||||
}
|
||||
|
||||
//为空，直接返回
|
||||
String json = IOUtils.toString(super.getInputStream(), "utf-8");
|
||||
if (StringUtils.isBlank(json)) {
|
||||
return super.getInputStream();
|
||||
}
|
||||
|
||||
//xss过滤
|
||||
json =xssEncode(json);
|
||||
json = StringEscapeUtils.unescapeHtml4(json);
|
||||
|
||||
final ByteArrayInputStream bis =
|
||||
new ByteArrayInputStream(json.getBytes("utf-8"));
|
||||
|
||||
return new ServletInputStream() {
|
||||
@Override
|
||||
public boolean isFinished() {
|
||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean isReady() {
|
||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void setReadListener(ReadListener readListener) {
|
||||
}
|
||||
|
||||
@Override
|
||||
public int read() throws IOException {
|
||||
return bis.read();
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
@Override
|
||||
public String getParameter(String name) {
|
||||
String value = super.getParameter(xssEncode(name));
|
||||
if (StringUtils.isNotBlank(value)) {
|
||||
value =xssEncode(value);
|
||||
}
|
||||
|
||||
return StringEscapeUtils.unescapeHtml4(value);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String[] getParameterValues(String name) {
|
||||
String[] parameters = super.getParameterValues(name);
|
||||
if (parameters == null || parameters.length == 0) {
|
||||
return null;
|
||||
}
|
||||
|
||||
for (int i = 0; i < parameters.length; i++) {
|
||||
parameters[i] = xssEncode(parameters[i]);
|
||||
parameters[i] = StringEscapeUtils.unescapeHtml4(parameters[i]);
|
||||
}
|
||||
return parameters;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Map<String, String[]> getParameterMap() {
|
||||
Map<String, String[]> map = new LinkedHashMap<>();
|
||||
Map<String, String[]> parameters = super.getParameterMap();
|
||||
for (String key : parameters.keySet()) {
|
||||
String[] values = parameters.get(key);
|
||||
for (int i = 0; i < values.length; i++) {
|
||||
values[i] = xssEncode(values[i]);
|
||||
values[i] = StringEscapeUtils.unescapeHtml4(values[i]);
|
||||
}
|
||||
map.put(key, values);
|
||||
}
|
||||
return map;
|
||||
}
|
||||
|
||||
@Override
|
||||
public String getHeader(String name) {
|
||||
String value = super.getHeader(xssEncode(name));
|
||||
if (StringUtils.isNotBlank(value)) {
|
||||
value = xssEncode(value);
|
||||
}
|
||||
|
||||
return StringEscapeUtils.unescapeHtml4(value);
|
||||
}
|
||||
|
||||
private String xssEncode(String input) {
|
||||
return htmlFilter.filter(input);
|
||||
}
|
||||
|
||||
/**
|
||||
* 获取最原始的request
|
||||
*/
|
||||
public HttpServletRequest getOrgRequest() {
|
||||
return orgRequest;
|
||||
}
|
||||
|
||||
/**
|
||||
* 获取最原始的request
|
||||
*/
|
||||
public static HttpServletRequest getOrgRequest(HttpServletRequest request) {
|
||||
if (request instanceof XssHttpServletRequestWrapper) {
|
||||
return ((XssHttpServletRequestWrapper) request).getOrgRequest();
|
||||
}
|
||||
|
||||
return request;
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user