internal static string RecoverSteamParentalCode(byte[] passwordHash, byte[] salt, ESteamParentalAlgorithm steamParentalAlgorithm)
{
if ((passwordHash == null) || (salt == null) || !Enum.IsDefined(typeof(ESteamParentalAlgorithm), steamParentalAlgorithm))
{
ASF.ArchiLogger.LogNullError(nameof(passwordHash) + " || " + nameof(salt) + " || " + nameof(steamParentalAlgorithm));
return(null);
}
byte[] password = SteamParentalCodes.AsParallel().FirstOrDefault(passwordToTry => GenerateSteamParentalHash(passwordToTry, salt, (byte)passwordHash.Length, steamParentalAlgorithm)?.SequenceEqual(passwordHash) == true);
return(password != null?Encoding.UTF8.GetString(password) : null);
}
internal static byte[] GenerateSteamParentalHash(byte[] password, byte[] salt, byte hashLength, ESteamParentalAlgorithm steamParentalAlgorithm)
{
if ((password == null) || (salt == null) || (hashLength == 0) || !Enum.IsDefined(typeof(ESteamParentalAlgorithm), steamParentalAlgorithm))
{
ASF.ArchiLogger.LogNullError(nameof(password) + " || " + nameof(salt) + " || " + nameof(hashLength) + " || " + nameof(steamParentalAlgorithm));
return(null);
}
switch (steamParentalAlgorithm)
{
case ESteamParentalAlgorithm.Pbkdf2:
using (HMACSHA1 hmacAlgorithm = new HMACSHA1(password)) {
return(Pbkdf2.ComputeDerivedKey(hmacAlgorithm, salt, SteamParentalPbkdf2Iterations, hashLength));
}
case ESteamParentalAlgorithm.SCrypt:
return(SCrypt.ComputeDerivedKey(password, salt, SteamParentalSCryptIterations, SteamParentalSCryptBlocksCount, 1, null, hashLength));
default:
ASF.ArchiLogger.LogGenericError(string.Format(Strings.WarningUnknownValuePleaseReport, nameof(steamParentalAlgorithm), steamParentalAlgorithm));
return(null);
}
}
