internal static string GeneratePayload(DisqusRemoteUser remoteUser, string apiSecret, TimeSpan?timestamp = null)
{
string userData = JsonConvert.SerializeObject(remoteUser);
byte[] userDataAsBytes = userData.ToAsciiBytes();;
// Base64 Encode the message
string Message = Convert.ToBase64String(userDataAsBytes);
// Get the proper timestamp
TimeSpan ts = timestamp ?? DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0);
string timestampStr = Convert.ToInt32(ts.TotalSeconds).ToString();
// Convert the message + timestamp to bytes
byte[] messageAndTimestampBytes = $"{Message} {timestampStr}".ToAsciiBytes();
// Convert Disqus API key to HMAC-SHA1 signature
byte[] apiBytes = apiSecret.ToAsciiBytes();
HMACSHA1 hmac = new HMACSHA1(apiBytes);
byte[] hashedMessage = hmac.ComputeHash(messageAndTimestampBytes);
// Put it all together into the final payload
return($"{Message} {hashedMessage.ToHexString().ToLowerInvariant()} {timestampStr}");
}
public DisqusRemoteAuthentication(string apiKey, string apiSecret, DisqusRemoteUser remoteUser, TimeSpan?timestamp = null)
{
_apiKey = apiKey;
RemoteUser = remoteUser;
AuthenticationToken = SSOHelper.GeneratePayload(remoteUser, apiSecret, timestamp);
}