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);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType != JsonToken.Integer)
{
throw new Exception("Wrong Token Type");
}
long ticks = (long)reader.Value;
// Steam returns date/times as the number of seconds since 1/1/1970 (aka, unix timestamp).
return(UnixTimestampHelper.FromUnixTimestamp(ticks));
}
public SymantecRequest(Random random, DateTime utcTime)
{
timestamp = UnixTimestampHelper.ConvertToUnixTimeStamp(utcTime);
var default_model = $"MacBookPro{random.Next(1, 12)},{random.Next(1, 4)}";
model = default_model;
serial = RandomHelper.GenerateRandomStringOfLength(random, CharacterHelper.AllDigits + CharacterHelper.AllUpperCase, 12);
client_id = $"Mac-{RandomHelper.GenerateRandomStringOfLength(random, CharacterHelper.HexCharacters, 16)}";
os = default_model;
var data_before_hmac = $"{timestamp}{timestamp}{client_id_type}{client_id}{dist_channel}";
var data_before_hmac_utf8 = StringHelper.ToUtf8(data_before_hmac);
var digesthmac = HMACHelper.HashHMACSHA256(HMAC_KEY, data_before_hmac_utf8);
var base64hmac = Convert.ToBase64String(digesthmac);
data = base64hmac;
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
DateTime dt = (DateTime)value;
writer.WriteValue(UnixTimestampHelper.ToUnixTimestamp(dt));
}