public static Token GetTokenFromResponse(GetSharedSecretResponse response)
{
var unixTime = UnixTimestampHelper.ConvertToUnixTimeStamp(DateTime.UtcNow);
var token = new Token()
{
TimeSkew = unixTime - long.Parse(response.UTCTimestamp),
Salt = Base64Helper.Base64DecodeBytes(response.SecretContainer.EncryptionMethod.PBESalt),
IterationCount = int.Parse(response.SecretContainer.EncryptionMethod.PBEIterationCount),
Iv = Base64Helper.Base64DecodeBytes(response.SecretContainer.EncryptionMethod.IV),
Id = response.SecretContainer.Device.Secret.Id,
Cipher = Base64Helper.Base64DecodeBytes(response.SecretContainer.Device.Secret.Data.Cipher),
Digest = Base64Helper.Base64DecodeBytes(response.SecretContainer.Device.Secret.Data.Digest.Text),
Expiry = response.SecretContainer.Device.Secret.Expiry,
Period = int.Parse(response.SecretContainer.Device.Secret.Usage.TimeStep),
Counter = int.Parse(response.SecretContainer.Device.Secret.Usage.Counter ?? "0")
};
var alg = response.SecretContainer.Device.Secret.Usage.AI.Type;
var algSplitted = alg.Split('-');
if (algSplitted.Length == 4 && algSplitted[0] == "HMAC" && algSplitted[2] == "TRUNC" && algSplitted[3].EndsWith("DIGITS"))
{
token.Algorithm = algSplitted[1].ToLowerInvariant();
token.Digits = int.Parse(algSplitted[3].Substring(0, algSplitted[3].Length - 6));
}
else
{
throw new InvalidOperationException($"Unknown algorithm: {alg}");
}
return(token);
}
