package com.ruoyi.gateway.filter;
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import com.alibaba.fastjson.JSON;
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import com.alibaba.fastjson.JSONObject;
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import com.ruoyi.common.core.constant.CacheConstants;
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import com.ruoyi.common.core.constant.HttpStatus;
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import com.ruoyi.common.core.constant.SecurityConstants;
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import com.ruoyi.common.core.constant.TokenConstants;
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import com.ruoyi.common.core.utils.JwtUtils;
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import com.ruoyi.common.core.utils.ServletUtils;
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import com.ruoyi.common.core.utils.StringUtils;
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import com.ruoyi.common.redis.service.RedisService;
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import com.ruoyi.gateway.config.properties.IgnoreWhiteProperties;
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import io.jsonwebtoken.Claims;
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import org.apache.commons.codec.binary.Base64;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.cloud.gateway.filter.GatewayFilterChain;
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import org.springframework.cloud.gateway.filter.GlobalFilter;
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import org.springframework.core.Ordered;
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import org.springframework.core.io.buffer.DataBuffer;
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import org.springframework.core.io.buffer.DataBufferUtils;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.HttpMethod;
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import org.springframework.http.server.reactive.ServerHttpRequest;
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import org.springframework.http.server.reactive.ServerHttpRequestDecorator;
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import org.springframework.stereotype.Component;
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import org.springframework.web.server.ServerWebExchange;
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import reactor.core.publisher.Flux;
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import reactor.core.publisher.Mono;
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import java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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import java.util.concurrent.atomic.AtomicReference;
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/**
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* 网关鉴权
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*
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* @author ruoyi
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*/
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@Component
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public class SignFilter implements GlobalFilter, Ordered {
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private static final Logger log = LoggerFactory.getLogger(SignFilter.class);
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// 排除过滤的 uri 地址，nacos自行添加
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@Autowired
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private IgnoreWhiteProperties ignoreWhite;
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@Autowired
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private RedisService redisService;
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@Value("${security.sign}")
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private boolean parameter_signature;
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@Override
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public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
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ServerHttpRequest request = exchange.getRequest();
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ServerHttpRequest.Builder mutate = request.mutate();
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HttpMethod method = request.getMethod();
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if(method != HttpMethod.POST){
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return chain.filter(exchange.mutate().request(mutate.build()).build());
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}
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String sign = request.getHeaders().getFirst(TokenConstants.SIGN);
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String nonce_str = request.getHeaders().getFirst(TokenConstants.NONCE_STR);
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if (parameter_signature && StringUtils.isEmpty(sign)) {
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return unauthorizedResponse(exchange, "签名不能为空！");
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}
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if (parameter_signature && StringUtils.isEmpty(nonce_str)) {
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return unauthorizedResponse(exchange, "签名不能为空！");
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}
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if(parameter_signature){
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return authSign(exchange, chain, sign, nonce_str);
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}
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return chain.filter(exchange.mutate().request(mutate.build()).build());
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}
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private Mono<Void> unauthorizedResponse(ServerWebExchange exchange, String msg) {
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log.error("[签名异常处理]请求路径:{}", exchange.getRequest().getPath());
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return ServletUtils.webFluxResponseWriter(exchange.getResponse(), msg, HttpStatus.BAD_REQUEST);
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}
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/**
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* 校验签名
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* @return
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*/
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private Mono<Void> authSign(ServerWebExchange exchange, GatewayFilterChain chain, String sign, String nonce_str){
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return DataBufferUtils.join(exchange.getRequest().getBody())
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.flatMap(dataBuffer -> {
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byte[] bytes = new byte[dataBuffer.readableByteCount()];
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dataBuffer.read(bytes);
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String bodyString = new String(bytes, StandardCharsets.UTF_8);
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log.info("请求参数：{}", bodyString);
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if(!authSign(JSON.parseObject(bodyString), sign, nonce_str)){
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return unauthorizedResponse(exchange, "签名验证失败！");
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}
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DataBufferUtils.release(dataBuffer);
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Flux<DataBuffer> cachedFlux = Flux.defer(() -> {
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DataBuffer buffer = exchange.getResponse().bufferFactory()
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.wrap(bytes);
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return Mono.just(buffer);
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});
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ServerHttpRequest mutatedRequest = new ServerHttpRequestDecorator(exchange.getRequest()) {
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@Override
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public Flux<DataBuffer> getBody() {
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return cachedFlux;
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}
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};
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return chain.filter(exchange.mutate().request(mutatedRequest)
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.build());
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});
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}
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/**
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* 签名校验
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* @return
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*/
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private boolean authSign(JSONObject jsonStr, String sign, String nonce_str) {
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System.err.println("请求签名：" + sign);
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String signUrlEncode = localSignUrl(jsonStr, nonce_str);
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signUrlEncode = signUrlEncode.replaceAll("& #40;", "\\(")
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.replaceAll("& #41;", "\\)");
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if(sign.equals(signUrlEncode)){
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return true;
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}
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System.err.println("签名值：" + signUrlEncode);
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return false;
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}
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/**
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* 组装签名路径
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* @param params
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* @return
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*/
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public static String localSignUrl(JSONObject params, String key) {
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List<String> keySet = new ArrayList<>(params.keySet());
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// 对所有传入参数按照字段名的 ASCII 码从小到大排序（字典序）
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Collections.sort(keySet, new Comparator<String>() {
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@Override
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public int compare(String o1, String o2) {
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return o1.compareTo(o2);
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}
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});
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// 构造签名键值对的格式
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StringBuilder sb = new StringBuilder();
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for (String k : keySet) {
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String v = params.getString(k);
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if(StringUtils.isNotEmpty(v)){
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sb.append(k + "=" + v + "&");
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}
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}
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String signUrl = sb.substring(0, sb.length() - 1);
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System.err.println("签名串：" + signUrl);
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return signUrlEncode(signUrl, key);
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}
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/**
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* 签名字符串加密
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* @param signUrl
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* @param encryptKey
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* @return
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*/
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public static String signUrlEncode(String signUrl, String encryptKey) {
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byte[] signByte = new byte[0];
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try {
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signByte = HMACSHA1.HmacSHA1Encrypt(signUrl, encryptKey);
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} catch (Exception e) {
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e.printStackTrace();
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throw new RuntimeException(e);
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}
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String localSign = Base64.encodeBase64String(signByte);
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return localSign;
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}
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@Override
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public int getOrder()
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{
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return -200;
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}
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}
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