iailab-plat.git

Merge branch 'master' of http://dlindusit.com:53929/r/iailab-plat

潘志宝

2024-11-11 aa1aa68141e3ee33f98cdd785ddc5c244fedc592

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e7c126	1	package com.iailab.framework.signature.core.aop;
H	2
	3	import cn.hutool.core.lang.Assert;
	4	import cn.hutool.core.map.MapUtil;
	5	import cn.hutool.core.util.ObjUtil;
	6	import cn.hutool.core.util.StrUtil;
	7	import cn.hutool.crypto.digest.DigestUtil;
	8	import com.iailab.framework.common.exception.ServiceException;
	9	import com.iailab.framework.common.util.servlet.ServletUtils;
	10	import com.iailab.framework.signature.core.annotation.ApiSignature;
	11	import com.iailab.framework.signature.core.redis.ApiSignatureRedisDAO;
	12	import lombok.AllArgsConstructor;
	13	import lombok.extern.slf4j.Slf4j;
	14	import org.aspectj.lang.JoinPoint;
	15	import org.aspectj.lang.annotation.Aspect;
	16	import org.aspectj.lang.annotation.Before;
	17
	18	import javax.servlet.http.HttpServletRequest;
	19	import java.util.Map;
	20	import java.util.Objects;
	21	import java.util.SortedMap;
	22	import java.util.TreeMap;
	23
	24	import static com.iailab.framework.common.exception.enums.GlobalErrorCodeConstants.BAD_REQUEST;
	25
	26	/**
	27	* 拦截声明了 {@link ApiSignature} 注解的方法，实现签名
	28	*
	29	* @author Zhougang
	30	*/
	31	@Aspect
	32	@Slf4j
	33	@AllArgsConstructor
	34	public class ApiSignatureAspect {
	35
	36	private final ApiSignatureRedisDAO signatureRedisDAO;
	37
	38	@Before("@annotation(signature)")
	39	public void beforePointCut(JoinPoint joinPoint, ApiSignature signature) {
	40	// 1. 验证通过，直接结束
	41	if (verifySignature(signature, Objects.requireNonNull(ServletUtils.getRequest()))) {
	42	return;
	43	}
	44
	45	// 2. 验证不通过，抛出异常
	46	log.error("[beforePointCut][方法{} 参数({}) 签名失败]", joinPoint.getSignature().toString(),
	47	joinPoint.getArgs());
	48	throw new ServiceException(BAD_REQUEST.getCode(),
	49	StrUtil.blankToDefault(signature.message(), BAD_REQUEST.getMsg()));
	50	}
	51
	52	public boolean verifySignature(ApiSignature signature, HttpServletRequest request) {
	53	// 1.1 校验 Header
	54	if (!verifyHeaders(signature, request)) {
	55	return false;
	56	}
	57	// 1.2 校验 appId 是否能获取到对应的 appSecret
	58	String appId = request.getHeader(signature.appId());
	59	String appSecret = signatureRedisDAO.getAppSecret(appId);
	60	Assert.notNull(appSecret, "[appId({})] 找不到对应的 appSecret", appId);
	61
	62	// 2. 校验签名【重要！】
	63	String clientSignature = request.getHeader(signature.sign()); // 客户端签名
	64	String serverSignatureString = buildSignatureString(signature, request, appSecret); // 服务端签名字符串
	65	String serverSignature = DigestUtil.sha256Hex(serverSignatureString); // 服务端签名
	66	if (ObjUtil.notEqual(clientSignature, serverSignature)) {
	67	return false;
	68	}
	69
	70	// 3. 将 nonce 记入缓存，防止重复使用（重点二：此处需要将 ttl 设定为允许 timestamp 时间差的值 x 2 ）
	71	String nonce = request.getHeader(signature.nonce());
	72	signatureRedisDAO.setNonce(nonce, signature.timeout() * 2, signature.timeUnit());
	73	return true;
	74	}
	75
	76	/**
	77	* 校验请求头加签参数
	78	*
	79	* 1. appId 是否为空
	80	* 2. timestamp 是否为空，请求是否已经超时，默认 10 分钟
	81	* 3. nonce 是否为空，随机数是否 10 位以上，是否在规定时间内已经访问过了
	82	* 4. sign 是否为空
	83	*
	84	* @param signature signature
	85	* @param request request
	86	* @return 是否校验 Header 通过
	87	*/
	88	private boolean verifyHeaders(ApiSignature signature, HttpServletRequest request) {
	89	// 1. 非空校验
	90	String appId = request.getHeader(signature.appId());
	91	if (StrUtil.isBlank(appId)) {
	92	return false;
	93	}
	94	String timestamp = request.getHeader(signature.timestamp());
	95	if (StrUtil.isBlank(timestamp)) {
	96	return false;
	97	}
	98	String nonce = request.getHeader(signature.nonce());
	99	if (StrUtil.length(nonce) < 10) {
	100	return false;
	101	}
	102	String sign = request.getHeader(signature.sign());
	103	if (StrUtil.isBlank(sign)) {
	104	return false;
	105	}
	106
	107	// 2. 检查 timestamp 是否超出允许的范围（重点一：此处需要取绝对值）
	108	long expireTime = signature.timeUnit().toMillis(signature.timeout());
	109	long requestTimestamp = Long.parseLong(timestamp);
	110	long timestampDisparity = Math.abs(System.currentTimeMillis() - requestTimestamp);
	111	if (timestampDisparity > expireTime) {
	112	return false;
	113	}
	114
	115	// 3. 检查 nonce 是否存在，有且仅能使用一次
	116	return signatureRedisDAO.getNonce(nonce) == null;
	117	}
	118
	119	/**
	120	* 构建签名字符串
	121	*
	122	* 格式为 = 请求参数 + 请求体 + 请求头 + 密钥
	123	*
	124	* @param signature signature
	125	* @param request request
	126	* @param appSecret appSecret
	127	* @return 签名字符串
	128	*/
	129	private String buildSignatureString(ApiSignature signature, HttpServletRequest request, String appSecret) {
	130	SortedMap<String, String> parameterMap = getRequestParameterMap(request); // 请求头
	131	SortedMap<String, String> headerMap = getRequestHeaderMap(signature, request); // 请求参数
	132	String requestBody = StrUtil.nullToDefault(ServletUtils.getBody(request), ""); // 请求体
	133	return MapUtil.join(parameterMap, "&", "=")
	134	+ requestBody
	135	+ MapUtil.join(headerMap, "&", "=")
	136	+ appSecret;
	137	}
	138
	139	/**
	140	* 获取请求头加签参数 Map
	141	*
	142	* @param request 请求
	143	* @param signature 签名注解
	144	* @return signature params
	145	*/
	146	private static SortedMap<String, String> getRequestHeaderMap(ApiSignature signature, HttpServletRequest request) {
	147	SortedMap<String, String> sortedMap = new TreeMap<>();
	148	sortedMap.put(signature.appId(), request.getHeader(signature.appId()));
	149	sortedMap.put(signature.timestamp(), request.getHeader(signature.timestamp()));
	150	sortedMap.put(signature.nonce(), request.getHeader(signature.nonce()));
	151	return sortedMap;
	152	}
	153
	154	/**
	155	* 获取请求参数 Map
	156	*
	157	* @param request 请求
	158	* @return queryParams
	159	*/
	160	private static SortedMap<String, String> getRequestParameterMap(HttpServletRequest request) {
	161	SortedMap<String, String> sortedMap = new TreeMap<>();
	162	for (Map.Entry<String, String[]> entry : request.getParameterMap().entrySet()) {
	163	sortedMap.put(entry.getKey(), entry.getValue()[0]);
	164	}
	165	return sortedMap;
	166	}
	167
	168	}
	169