add aesbody for get aes cryptbody

2025-11-02 18:58:01 +08:00
parent 9a8d14142a
commit c7373da691
5 changed files with 297 additions and 0 deletions
@@ -0,0 +1,113 @@
+using System;
+using System.Linq;
+using Microsoft.AspNetCore.Mvc.Filters;
+using Microsoft.Extensions.Caching.Distributed;
+using Microsoft.Extensions.DependencyInjection;
+using SimApi.Exceptions;
+using SimApi.Helpers;
+using SimApi.ModelBinders;
+
+namespace SimApi.Attributes;
+
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
+public class SimApiSignAttribute : ActionFilterAttribute
+{
+    protected Type KeyProvider { get; set; } = typeof(SimApiSignProviderBase);
+
+    public override void OnActionExecuting(ActionExecutingContext context)
+    {
+        if (context.HttpContext.RequestServices.GetService(KeyProvider) is not SimApiSignProviderBase keyProvider)
+        {
+            throw new SimApiException(400, "未配置签名器");
+        }
+
+        string? appId = null;
+        if (!string.IsNullOrEmpty(keyProvider.AppIdName))
+        {
+            appId = context.HttpContext.Request.Query[keyProvider.AppIdName]
+                .FirstOrDefault() ?? context.HttpContext.Request.Headers[keyProvider.AppIdName]
+                .FirstOrDefault();
+
+            if (string.IsNullOrEmpty(appId))
+            {
+                throw new SimApiException(400, $"获取{keyProvider.AppIdName}失败");
+            }
+        }
+
+        // 4. 通过接口获取密钥（解耦的核心：不再直接依赖数据库）
+        var key = keyProvider.GetKey(appId);
+        if (string.IsNullOrEmpty(key))
+        {
+            throw new SimApiException(400, "获取签名KEY失败");
+        }
+
+        var timestamp = context.HttpContext.Request.Query[keyProvider.TimestampName]
+            .FirstOrDefault() ?? context.HttpContext.Request.Headers[keyProvider.TimestampName]
+            .FirstOrDefault();
+        if (string.IsNullOrEmpty(timestamp))
+        {
+            throw new SimApiException(400, $"{keyProvider.TimestampName}不能为空");
+        }
+
+        var nonce = context.HttpContext.Request.Query[keyProvider.NonceName]
+            .FirstOrDefault() ?? context.HttpContext.Request.Headers[keyProvider.NonceName]
+            .FirstOrDefault();
+        if (string.IsNullOrEmpty(nonce))
+        {
+            throw new SimApiException(400, $"{keyProvider.NonceName}不能为空");
+        }
+
+        if (!int.TryParse(timestamp, out var ts))
+        {
+            throw new SimApiException(400, $"{keyProvider.TimestampName}格式错误");
+        }
+
+        if (keyProvider.QueryExpires != 0)
+        {
+            if (ts > SimApiUtil.TimestampNow + 2)
+            {
+                throw new SimApiException(400, "请校准本地时间");
+            }
+
+            if (ts + keyProvider.QueryExpires < SimApiUtil.TimestampNow)
+            {
+                throw new SimApiException(400, "请求已过期");
+            }
+
+            if (keyProvider.DuplicateRequestProtection)
+            {
+                var cache = context.HttpContext.RequestServices.GetRequiredService<IDistributedCache>();
+                if (cache.GetString("SignQuery:" + nonce) == null)
+                {
+                    cache.SetString("SignQuery:" + nonce, timestamp, new DistributedCacheEntryOptions()
+                    {
+                        SlidingExpiration = TimeSpan.FromSeconds(keyProvider.QueryExpires + 2)
+                    });
+                }
+                else
+                {
+                    throw new SimApiException(400, "重复请求");
+                }
+            }
+        }
+
+        var signStr = string.Empty;
+        foreach (var item in keyProvider.SignFields)
+        {
+            signStr += $"{item}=";
+            signStr += context.HttpContext.Request.Query[item]
+                .FirstOrDefault() ?? context.HttpContext.Request.Headers[item]
+                .FirstOrDefault();
+            signStr += "&";
+        }
+
+        signStr += $"{keyProvider.TimestampName}={ts}&{keyProvider.NonceName}={nonce}&{key}";
+        var sign = context.HttpContext.Request.Query[keyProvider.SignName]
+            .FirstOrDefault() ?? context.HttpContext.Request.Headers[keyProvider.SignName]
+            .FirstOrDefault();
+        if (SimApiUtil.Md5(signStr) != sign)
+        {
+            throw new SimApiException(400, "签名错误");
+        }
+    }
+}