private void AddAuthorization(HttpRequestMessage request)
{
if (_credentials != null)
{
var signature = new ApiRequestSignature {
AppId = _credentials.AppId
};
var parameters = new[]
{
new NameValuePair(null, _credentials.AppId),
new NameValuePair(null, signature.TimestampString)
};
signature.Hash = HmacUtility.GetHashString(key => new HMACSHA256(key), _credentials.SecretKey, parameters);
request.Headers.Authorization = new AuthenticationHeaderValue("HMACSHA256", signature.ToString());
}
}
