/*
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* Copyright (c) 2018-2028, Chill Zhuang All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* Neither the name of the dreamlu.net developer nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* Author: Chill 庄骞 (smallchill@163.com)
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*/
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package org.springblade.core.secure.interceptor;
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import lombok.AllArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springblade.core.secure.props.SignSecure;
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import org.springblade.core.secure.provider.HttpMethod;
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import org.springblade.core.secure.provider.ResponseProvider;
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import org.springblade.core.tool.jackson.JsonUtil;
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import org.springblade.core.tool.utils.DateUtil;
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import org.springblade.core.tool.utils.DigestUtil;
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import org.springblade.core.tool.utils.Func;
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import org.springblade.core.tool.utils.WebUtil;
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import org.springframework.lang.NonNull;
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import org.springframework.util.AntPathMatcher;
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import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.time.Duration;
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import java.util.Date;
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import java.util.List;
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/**
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* 签名认证拦截器校验
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*
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* @author Chill
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*/
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@Slf4j
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@AllArgsConstructor
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public class SignInterceptor extends HandlerInterceptorAdapter {
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/**
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* 表达式匹配
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*/
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private static final AntPathMatcher ANT_PATH_MATCHER = new AntPathMatcher();
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/**
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* 授权集合
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*/
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private final List<SignSecure> signSecures;
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/**
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* 请求时间
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*/
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private final static String TIMESTAMP = "timestamp";
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/**
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* 随机数
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*/
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private final static String NONCE = "nonce";
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/**
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* 时间随机数组合加密串
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*/
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private final static String SIGNATURE = "signature";
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/**
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* sha1加密方式
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*/
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private final static String SHA1 = "sha1";
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/**
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* md5加密方式
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*/
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private final static String MD5 = "md5";
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/**
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* 时间差最小值
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*/
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private final static Integer SECOND_MIN = 0;
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/**
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* 时间差最大值
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*/
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private final static Integer SECOND_MAX = 10;
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@Override
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public boolean preHandle(@NonNull HttpServletRequest request, @NonNull HttpServletResponse response, @NonNull Object handler) {
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boolean check = signSecures.stream().filter(signSecure -> checkAuth(request, signSecure)).findFirst().map(
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authSecure -> checkSign(authSecure.getCrypto())
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).orElse(Boolean.TRUE);
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if (!check) {
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log.warn("授权认证失败，请求接口：{}，请求IP：{}，请求参数：{}", request.getRequestURI(), WebUtil.getIP(request), JsonUtil.toJson(request.getParameterMap()));
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ResponseProvider.write(response);
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return false;
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}
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return true;
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}
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/**
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* 检测授权
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*/
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private boolean checkAuth(HttpServletRequest request, SignSecure signSecure) {
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return checkMethod(request, signSecure.getMethod()) && checkPath(request, signSecure.getPattern());
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}
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/**
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* 检测请求方法
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*/
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private boolean checkMethod(HttpServletRequest request, HttpMethod method) {
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return method == HttpMethod.ALL || (
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method != null && method == HttpMethod.of(request.getMethod())
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);
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}
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/**
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* 检测路径匹配
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*/
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private boolean checkPath(HttpServletRequest request, String pattern) {
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String servletPath = request.getServletPath();
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String pathInfo = request.getPathInfo();
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if (pathInfo != null && pathInfo.length() > 0) {
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servletPath = servletPath + pathInfo;
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}
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return ANT_PATH_MATCHER.match(pattern, servletPath);
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}
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/**
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* 检测表达式
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*/
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private boolean checkSign(String crypto) {
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try {
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HttpServletRequest request = WebUtil.getRequest();
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if (request == null) {
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return false;
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}
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// 获取头部动态签名信息
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String timestamp = request.getHeader(TIMESTAMP);
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// 判断是否在合法时间段
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long seconds = Duration.between(new Date(Func.toLong(timestamp)).toInstant(), DateUtil.now().toInstant()).getSeconds();
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if (seconds < SECOND_MIN || seconds > SECOND_MAX) {
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log.warn("授权认证失败，错误信息：{}", "请求时间戳非法");
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return false;
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}
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String nonce = request.getHeader(NONCE);
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String signature = request.getHeader(SIGNATURE);
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// 加密签名比对，可自行拓展加密规则
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String sign;
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if (crypto.equals(MD5)) {
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sign = DigestUtil.md5Hex(timestamp + nonce);
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} else if (crypto.equals(SHA1)) {
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sign = DigestUtil.sha1Hex(timestamp + nonce);
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} else {
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sign = DigestUtil.sha1Hex(timestamp + nonce);
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}
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return sign.equalsIgnoreCase(signature);
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} catch (Exception e) {
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log.warn("授权认证失败，错误信息：{}", e.getMessage());
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return false;
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}
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}
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}
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