public static byte[] Decrypt(byte[] Payload, KeyPair keyPair)
{
ushort Id;
int Length;
ushort Version;
using (Reader reader = new Reader(Payload))
{
Id = reader.ReadUInt16();
Length = reader.ReadInt24();
Version = reader.ReadUInt16();
Payload = Payload.Skip(2).Skip(3).Skip(2).ToArray();
}
if (!Form1.Config.UseRC4)
{
switch (Id)
{
case 20100:
decryptedPayload = Payload;
break;
case 20103:
decryptedPayload = Payload;
break;
case 20104:
ClientConfig.ServerNonce = GenericHash.Hash(ClientConfig.SNonce.Concat(keyPair.PublicKey).Concat(Keys.ServerKey).ToArray(), null, 24);
decryptedPayload = PublicKeyBox.Open(Payload, ClientConfig.ServerNonce, keyPair.PrivateKey, Keys.ServerKey);
ClientConfig.RNonce = decryptedPayload.Take(24).ToArray();
ClientConfig.SharedKey = decryptedPayload.Skip(24).Take(32).ToArray();
decryptedPayload = decryptedPayload.Skip(24).Skip(32).ToArray();
break;
default:
ClientConfig.RNonce = Utilities.Increment(Utilities.Increment(ClientConfig.RNonce));
byte[] toDecrypt = new byte[16].Concat(Payload).ToArray();
decryptedPayload = SecretBox.Open(toDecrypt, ClientConfig.RNonce, ClientConfig.SharedKey);
Logger.Write(Encoding.UTF8.GetString(decryptedPayload), "Decrypted OHD");
break;
}
}
else if (Form1.Config.UseRC4)
{
decryptedPayload = RC4.Decrypt(Payload);
}
else
{
}
return(decryptedPayload);
}
public static byte[] Decrypt(byte[] encrypted)
{
byte[] decrypted;
ushort id;
int length;
ushort version;
using (var reader = new Reader(encrypted))
{
id = reader.ReadUInt16();
length = reader.ReadInt24();
version = reader.ReadUInt16();
}
encrypted = encrypted.Skip(2).Skip(3).Skip(2).ToArray();
switch (id)
{
case 10100:
decrypted = encrypted;
break;
case 10101:
ServerConfig.clientPublicKey = encrypted.Take(32).ToArray();
encrypted = encrypted.Skip(32).ToArray();
ServerConfig.clientSharedKey = ServerConfig.clientPublicKey;
ServerConfig.clientRNonce = Utils.GenerateRandomBytes(24);
byte[] nonce = GenericHash.Hash(ServerConfig.clientPublicKey.Concat(Keys.ServerKey).ToArray(), null, 24);
decrypted = PublicKeyBox.Open(encrypted, nonce, ServerConfig.privateKey, ServerConfig.clientPublicKey);
ServerConfig.clientSessionKey = decrypted.Take(24).ToArray();
ServerConfig.clientSNonce = decrypted.Skip(24).Take(24).ToArray();
ServerConfig.clientSNonce = ServerConfig.clientSNonce;
decrypted = decrypted.Skip(24).Skip(24).ToArray();
Console.WriteLine(BitConverter.ToString(ServerConfig.clientSNonce).Replace("-", ""));
Console.WriteLine(BitConverter.ToString(ServerConfig.clientSessionKey).Replace("-", ""));
Console.WriteLine(BitConverter.ToString(nonce).Replace("-", ""));
Console.WriteLine(BitConverter.ToString(ServerConfig.clientPublicKey).Replace("-", ""));
break;
default:
ServerConfig.clientSNonce = Utilities.Increment(Utilities.Increment(ServerConfig.clientSNonce));
decrypted = SecretBox.Open(new byte[16].Concat(encrypted).ToArray(), ServerConfig.clientSNonce, ServerConfig.clientSharedKey);
break;
}
return(decrypted);
}