/// <summary>
/// Computes the challenge hash from the challengeBytes and the password. The client has a matching function to create the same.
/// </summary>
/// <returns>The challenge hash.</returns>
/// <param name="challengeBytes">Challenge bytes.</param>
/// <param name="password">Password.</param>
public static string ComputeChallengeHash(byte[] challengeBytes, string password)
{
// By-and-large the following is nearly verbatim from the InWorldz.Whip.Client.AuthResponse construcutor.
//convert the password to ascii
var encoding = new ASCIIEncoding();
var asciiPW = encoding.GetBytes(password ?? string.Empty);
var authString = new AppendableByteArray(asciiPW.Length + challengeBytes.Length);
authString.Append(asciiPW);
authString.Append(challengeBytes);
var sha = new SHA1CryptoServiceProvider();
var challengeHash = sha.ComputeHash(authString.data);
return(InWorldz.Whip.Client.Util.HashToHex(challengeHash));
}
private static byte[] GenerateAuthResponsePacket(byte[] challengeBytes, string password)
{
//convert the password to ascii
var encoding = new System.Text.ASCIIEncoding();
var asciiPW = encoding.GetBytes(password);
//add the two ranges together and compute the hash
var authString = new AppendableByteArray(asciiPW.Length + challengeBytes.Length);
authString.Append(asciiPW);
authString.Append(challengeBytes);
var sha = new SHA1CryptoServiceProvider();
byte[] challengeHash = sha.ComputeHash(authString.data);
//copy the results to the raw packet data
var rawMessageData = new AppendableByteArray(RESPONSE_PACKET_MESSAGE_SIZE);
rawMessageData.Append(RESPONSE_PACKET_IDENTIFIER);
rawMessageData.Append(encoding.GetBytes(Util.HashToHex(challengeHash)));
return(rawMessageData.data);
}
