//! \file AudioTINK.cs //! \date Fri Jun 17 14:13:39 2016 //! \brief Cyberworks encrypted OGG audio. // // Copyright (C) 2016 by morkt // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to // deal in the Software without restriction, including without limitation the // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or // sell copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS // IN THE SOFTWARE. // using System; using System.Collections.Generic; using System.ComponentModel.Composition; using System.IO; using System.Text; using GameRes.Utility; namespace GameRes.Formats.Cyberworks { [Serializable] public class TinkAudioScheme : ResourceScheme { public Dictionary<uint, byte[]> KnownKeys; } [Export(typeof(AudioFormat))] public class TinkAudio : AudioFormat { public override string Tag { get { return "OGG/TINK"; } } public override string Description { get { return "Cyberworks encrypted OGG audio"; } } public override uint Signature { get { return 0x6B6E6954; } } public TinkAudio () { Signatures = new uint[] { 0x6B6E6954, 0x676E6F53, 0 }; // 'Tink', 'Song' Extensions = new string[] { "j0", "k0", "u0" }; } static Dictionary<uint, byte[]> KnownKeys = new Dictionary<uint, byte[]>(); public override ResourceScheme Scheme { get { return new TinkAudioScheme { KnownKeys = KnownKeys }; } set { KnownKeys = ((TinkAudioScheme)value).KnownKeys; } } public override SoundInput TryOpen (IBinaryStream file) { var header = new byte[Math.Min (0xE1F, file.Length)]; if (0x10 != file.Read (header, 0, 0x10)) return null; var signature = LittleEndian.ToUInt32 (header, 0); byte[] key; if (!KnownKeys.TryGetValue (signature, out key)) { signature = LittleEndian.ToUInt32 (header, 0xC); if (!KnownKeys.TryGetValue (signature, out key)) return null; file.Read (header, 4, 0xC); } header[0] = (byte)'O'; header[1] = (byte)'g'; header[2] = (byte)'g'; header[3] = (byte)'S'; file.Read (header, 0x10, header.Length-0x10); int k = 0; for (int i = 4; i < header.Length; ++i) { header[i] ^= key[k++]; if (k >= key.Length) k = 1; } Stream input; if (header.Length >= file.Length) input = new MemoryStream (header); else input = new PrefixStream (header, new StreamRegion (file.AsStream, file.Position)); var sound = new OggInput (input); if (header.Length >= file.Length) file.Dispose(); return sound; } } }