protected override Uri ProcessRequestUrl(UriBuilder url, Dictionary <string, object> payload)
{
if (CanMakeAuthenticatedRequest(payload))
{
if (!payload.ContainsKey("method"))
{
return(url.Uri);
}
string method = payload["method"].ToStringInvariant();
payload.Remove("method");
var dict = new Dictionary <string, object>
{
["Timestamp"] = DateTime.UtcNow.ToString("s"),
["AccessKeyId"] = PublicApiKey.ToUnsecureString(),
["SignatureMethod"] = "HmacSHA256",
["SignatureVersion"] = "2"
};
string msg = null;
if (method == "GET")
{
dict = dict.Concat(payload).ToDictionary(x => x.Key, x => x.Value);
}
msg = GetFormForPayload(dict, false);
// must sort case sensitive
msg = string.Join("&", new SortedSet <string>(msg.Split('&'), StringComparer.Ordinal));
StringBuilder sb = new StringBuilder();
sb.Append(method).Append("\n")
.Append(url.Host).Append("\n")
.Append(url.Path).Append("\n")
.Append(msg);
var sig = CryptoUtility.SHA256SignBase64(sb.ToString(), PrivateApiKey.SecureStringToBytes());
msg += "&Signature=" + Uri.EscapeDataString(sig);
url.Query = msg;
}
return(url.Uri);
}