public VerifySignAttribute()
{
_logger = IoC.Resolve <ILogger <VerifySignAttribute> >();
Order = 1;
_configuration = IoC.Resolve <IConfiguration>();
_verifySignCommon = IoC.Resolve <IOperationFilter>();
_verifySignOption = IoC.Resolve <VerifySignOption>();
}
private bool CheckTime(long requestTime, VerifySignOption _verifySignOption)
{
long unixSeconds = DateTimeOffset.Now.ToUnixTimeSeconds();
if (requestTime + _verifySignOption.ExpireSeconds - unixSeconds < 0)
{
return(false);
}
return(true);
}
private async Task <Tuple <bool, string> > GetSignValue(HttpContext request, ILogger <VerifySignAttribute> _logger, 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("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;
}
var timestampStr = queryDic[commonParameters.TimestampName];
if (!long.TryParse(timestampStr, out long timestamp) || !CheckTime(timestamp, _verifySignOption))
{
_logger.LogWarning($"{timestampStr}时间戳已过期");
return(Tuple.Create <bool, string>(false, "请校准客户端时间后再试"));
}
var appIdString = queryDic[commonParameters.AppIdName].ToString();
if (string.IsNullOrEmpty(appIdString))
{
_logger.LogWarning(@"The request parameter is missing the Ak/Sk appID parameter
VerifySign:{
AppSecret:{
[AppId]:[Secret]
}}");
return(Tuple.Create <bool, string>(false, "服务异常，AppIdName未配置"));
}
var signvalue = queryDic[commonParameters.SignName].ToString();
queryDic.Remove(commonParameters.SignName);
var bodyValue = await SignCommon.ReadAsStringAsync(request);
if (!string.IsNullOrEmpty(bodyValue) && !"null".Equals(bodyValue))
{
bodyValue = Regex.Replace(bodyValue, @"\s(?=([^""]*""[^""]*"")*[^""]*$)", 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($"请求接口地址：{request.Request.Path}");
_logger.LogInformation($"拼装排序后的值{Convert.ToBase64String(Encoding.Default.GetBytes(utf8Request))}");
_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");
}
if (signvalue == result)
{
return(Tuple.Create <bool, string>(true, "签名通过"));
}
return(Tuple.Create <bool, string>(false, "签名异常,请求非法"));
}
catch (Exception ex)
{
_logger.LogError(ex, "签名异常");
return(Tuple.Create <bool, string>(false, "签名异常"));
}
}
