public VerifySignFilter(ILogger <VerifySignFilter> logger, IConfiguration configuration, IOperationFilter verifySignCommon, VerifySignOption verifySignOption)
{
_logger = logger;
_configuration = configuration;
_verifySignCommon = verifySignCommon;
_verifySignOption = verifySignOption;
}
/// <summary>
/// Post:（从头排序后+body json整体 ）hash
/// </summary>
/// <param name="context"></param>
/// <param name="requestCacheData"></param>
/// <returns></returns>
public async Task InvokeAsync(HttpContext context, RequestCacheData requestCacheData, VerifySignOption verifySignOption, IOperationFilter _verifySignCommon)
{
if (!context.Request.Path.Value.ToLower().StartsWith("/api"))
{
await _next(context);
return;
}
var endpoint = context.Features.Get <IEndpointFeature>()?.Endpoint;
if (endpoint != null)
{
if (endpoint.Metadata
.Any(m => m is IgnoreSignAttribute))
{
_logger.LogInformation($"{context.Request.Path.Value}路径已绕过签名;如设置了必须签名依旧没命中,请检查HTTP method是否匹配;Method={context.Request.Method}");
await _next(context);
return;
}
}
context.Request.EnableBuffering();
var result = await GetSignValue(context, requestCacheData, verifySignOption, _verifySignCommon);
if (verifySignOption.IsForce && !result.Item1)
{
if (!context?.Response.HasStarted ?? false)
{
context.Response.StatusCode = StatusCodes.Status403Forbidden;
context.Response.ContentType = "application/text";
}
await context.Response.WriteAsync(result.Item2);
await Task.CompletedTask;
return;
}
else
{
goto gotoNext;
}
gotoNext:
await _next(context);
}
private async Task <Tuple <bool, string> > GetSignValue(HttpContext request, RequestCacheData requestCacheData, VerifySignOption verifySignOption, IOperationFilter _verifySignCommon)
{
try
{
var convertedDictionatry = request.Request.Query.ToDictionary(s => s.Key, s => s.Value);
var queryDic = new Dictionary <string, string>();
foreach (var item in convertedDictionatry)
{
queryDic.Add(item.Key.ToLower(), item.Value);
}
var encryptEnum = EncryptEnum.Default;
var commonParameters = verifySignOption.CommonParameters;
if (!queryDic.ContainsKey(commonParameters.TimestampName) || !queryDic.ContainsKey(commonParameters.AppIdName) || !queryDic.ContainsKey(commonParameters.SignName))
{
_logger.LogWarning("方式：[Middleware] url参数中未找到签名所需参数[timestamp];[appid];[EncryptFlag]或[sign]");
return(Tuple.Create <bool, string>(false, "签名参数缺失"));
}
if (queryDic.ContainsKey(commonParameters.EncryptFlag) && int.TryParse(queryDic[commonParameters.EncryptFlag].ToString(), out int encryptint))
{
encryptEnum = (EncryptEnum)encryptint;
}
//认证token也参与签名
if (!string.IsNullOrWhiteSpace(request.Request.Headers["Authorization"]))
{
queryDic.Add("authorization", request.Request.Headers["Authorization"]);
}
var timestampStr = queryDic[commonParameters.TimestampName];
if (!long.TryParse(timestampStr, out long timestamp) || !SignCommon.CheckTime(timestamp, verifySignOption.ExpireSeconds))
{
_logger.LogWarning($"方式：[Middleware] {timestampStr}时间戳已过期");
return(Tuple.Create <bool, string>(false, "请校准客户端时间后再试"));
}
var appIdString = queryDic[commonParameters.AppIdName].ToString();
if (string.IsNullOrEmpty(appIdString))
{
_logger.LogWarning(@"方式：[Middleware] The request parameter is missing the Ak/Sk appID parameter
VerifySign:{
AppSecret:{
[AppId]:[Secret]
}}");
return(Tuple.Create <bool, string>(false, "服务异常，AppIdName未配置"));
}
var signvalue = queryDic[commonParameters.SignName].ToString();
queryDic.Remove(commonParameters.SignName);
string bodyValue;
if (requestCacheData == null || string.IsNullOrEmpty(requestCacheData.Body))
{
bodyValue = await SignCommon.ReadAsStringAsync(request);
requestCacheData = new RequestCacheData {
Body = bodyValue
};
}
else
{
bodyValue = requestCacheData.Body;
}
if (!string.IsNullOrEmpty(bodyValue) && !"null".Equals(bodyValue))
{
bodyValue = Regex.Replace(bodyValue, @"\s(?=([^""]*""[^""]*"")*[^""]*$)", string.Empty);
bodyValue = bodyValue.Replace("\r\n", "").Replace(" : ", ":").Replace("\n ", "").Replace("\n", "").Replace(": ", ":").Replace(", ", ",");
queryDic.Add("body", bodyValue);
}
var dicOrder = queryDic.OrderBy(s => s.Key, StringComparer.Ordinal).ToList();
StringBuilder requestStr = new StringBuilder();
for (int i = 0; i < dicOrder.Count(); i++)
{
if (i == dicOrder.Count() - 1)
{
requestStr.Append($"{dicOrder[i].Key}={dicOrder[i].Value}");
}
else
{
requestStr.Append($"{dicOrder[i].Key}={dicOrder[i].Value}&");
}
}
var utf8Request = SignCommon.GetUtf8(requestStr.ToString());
var result = _verifySignCommon.GetSignhHash(utf8Request, _verifySignCommon.GetSignSecret(appIdString), encryptEnum);
if (verifySignOption.IsDebug)
{
_logger.LogInformation($"方式：[Middleware] 请求接口地址：{request.Request.Path}");
_logger.LogInformation($"方式：[Middleware] 服务器签名前重新排序后的值={Convert.ToBase64String(Encoding.Default.GetBytes(utf8Request))}");
_logger.LogInformation($"方式：[Middleware] 摘要比对： 服务器签名结果={result} 客户端签名结果={signvalue };equal={signvalue == result}");
_logger.LogInformation($"方式：[Middleware] encryptEnum={encryptEnum}密钥={_verifySignCommon.GetSignSecret(appIdString)}");
}
else if (signvalue != result)
{
_logger.LogWarning(@$ "方式：[Middleware] 摘要被篡改：[iphide]----{signvalue }
查看详情，请设置VerifySignOption节点的IsDebug为true");
return(Tuple.Create <bool, string>(false, "签名异常,请求非法"));
}
return(Tuple.Create <bool, string>(true, "签名通过"));
}
catch (Exception ex)
{
_logger.LogError(ex, "方式：[Middleware] 签名异常");
return(Tuple.Create <bool, string>(false, "签名异常"));
}
}
/// <summary>
/// Post:（从头排序后+body json整体 ）hash
/// </summary>
/// <param name="context"></param>
/// <param name="requestCacheData"></param>
/// <returns></returns>
public async Task InvokeAsync(HttpContext context, RequestCacheData requestCacheData, VerifySignOption verifySignOption)
{
if (!context.Request.Path.Value.ToLower().StartsWith("/api"))
{
await _next(context);
return;
}
var endpoint = context.Features.Get <IEndpointFeature>()?.Endpoint;
if (endpoint != null)
{
if (endpoint.Metadata
.Any(m => m is IgnoreSignAttribute))
{
_logger.LogInformation($"{context.Request.Path.Value}路径已绕过签名");
await _next(context);
return;
}
}
context.Request.EnableBuffering();
var result = await GetSignValue(context, requestCacheData, verifySignOption);
if (verifySignOption.IsForce && !result.Item1)
{
if (!context?.Response.HasStarted ?? false)
{
context.Response.StatusCode = StatusCodes.Status403Forbidden;
context.Response.ContentType = "application/text";
}
await context.Response.WriteAsync(result.Item2);
//await context.Response.WriteAsync(JsonSerializer.Serialize(new { Code = -1, Msg = $"{result.Item2}", Result = string.Empty }, new JsonSerializerOptions
//{
// PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
// Encoder = System.Text.Encodings.Web.JavaScriptEncoder.Create(System.Text.Unicode.UnicodeRanges.All)
//}));
await Task.CompletedTask;
return;
}
else
{
goto gotoNext;
}
gotoNext:
await _next(context);
}
public static void OperationFilter <TFilter>(this VerifySignOption verifySignOption) where TFilter : IOperationFilter
{
verifySignOption.OperationFilterDescriptors.Add(typeof(TFilter));
}
