public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
if (!_verifySignOption.Enable || _verifySignOption.Scheme?.ToLower() != "attribute")
{
goto gotoNext;
}
var descriptor = (Microsoft.AspNetCore.Mvc.Controllers.ControllerActionDescriptor)context.ActionDescriptor;
var attributeController = (IgnoreSignAttribute)descriptor.ControllerTypeInfo.GetCustomAttributes(typeof(IgnoreSignAttribute), true).FirstOrDefault();
if (attributeController != null)
{
goto gotoNext;
}
var attribute = (IgnoreSignAttribute)descriptor.MethodInfo.GetCustomAttributes(typeof(IgnoreSignAttribute), true).FirstOrDefault();
if (attribute != null)
{
goto gotoNext;
}
if (!GetSignValue(context.HttpContext.Request))
{
SignCommon.BuildErrorJson(context);
await Task.CompletedTask;
return;
}
else
{
goto gotoNext;
}
gotoNext:
await next();
}
/// <summary>
/// 签名算法；支持hmac-sha256；md5
/// </summary>
/// <param name="message"></param>
/// <param name="secret"></param>
/// <param name="signMethod">哈希算法，默认HMACSHA256</param>
/// <returns>签名16进制</returns>
public virtual string GetSignhHash(string message, string secret, EncryptEnum signMethod = EncryptEnum.Default)
{
if (signMethod.HasFlag(EncryptEnum.Default) || signMethod.HasFlag(EncryptEnum.SignHMACSHA256))
{
return(SignCommon.GetHMACSHA256Sign(message, secret));
}
else if (signMethod.HasFlag(EncryptEnum.SignSHA256))
{
return(SignCommon.GetSHA256Sign(message, secret));
}
else if (signMethod.HasFlag(EncryptEnum.SignMD5))
{
return(SignCommon.CreateMD5(message, secret));
}
else
{
return(SignCommon.GetHMACSHA256Sign(message, secret));
}
}
/// <summary>
///
/// </summary>
/// <param name="message"></param>
/// <param name="secret"></param>
/// <returns>签名16进制</returns>
public virtual string GetSignhHash(string message, string secret)
{
return(SignCommon.GetSignhHash(message, secret));
}
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"));
}
}
private bool GetSignValue(HttpRequest request)
{
try
{
var queryDic = request.Query.ToDictionary(s => s.Key, s => s.Value);
var commonParameters = _verifySignOption.CommonParameters;
if (!queryDic.ContainsKey(commonParameters.TimestampName) || !queryDic.ContainsKey(commonParameters.AppIdName) || !queryDic.ContainsKey(commonParameters.SignName))
{
_logger.LogError("url参数中未找到签名所需参数[timestamp];[appid]或[sign]");
return(false);
}
var timestampStr = queryDic[commonParameters.TimestampName];
if (!long.TryParse(timestampStr, out long timestamp) || !CheckTime(timestamp))
{
_logger.LogError($"{timestampStr}时间戳已过期");
return(false);
}
var appIdString = queryDic[commonParameters.AppIdName].ToString();
if (string.IsNullOrEmpty(appIdString))
{
_logger.LogError(@"The request parameter is missing the Ak/Sk appID parameter
VerifySign:{
AppSecret:{
[AppId]:[Secret]
}}");
return(false);
}
var signvalue = queryDic[commonParameters.SignName].ToString();
queryDic.Remove(commonParameters.SignName);
var bodyValue = SignCommon.ReadAsString(request);
if (!string.IsNullOrEmpty(bodyValue) && !"null".Equals(bodyValue))
{
var dict = JsonSerializer.Deserialize <Dictionary <string, string> >(bodyValue);
foreach (var item in dict)
{
queryDic.Add(item.Key, item.Value);
if (_verifySignOption.IsDebug)
{
_logger.LogInformation($"字段:{item.Key}--值:{item.Value}");
}
}
}
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));
if (_verifySignOption.IsDebug)
{
_logger.LogInformation($"拼装排序后的值{request.Path}");
_logger.LogInformation($"拼装排序后的值{requestStr}");
_logger.LogInformation($"摘要计算后的值：{result}");
_logger.LogInformation($"摘要比对： {result}----{signvalue }");
}
else if (signvalue != result)
{
_logger.LogWarning(@$ "摘要被篡改：[iphide]----{signvalue }
查看详情，请设置VerifySignOption节点的IsDebug为true");
}
return(signvalue == result);
}
catch (Exception ex)
{
_logger.LogError(ex, "签名异常");
return(false);
}
}