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(Legacy): AGS32i encrypted resources.
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morkt
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57
Legacy/Ags32i/AudioAGS.cs
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57
Legacy/Ags32i/AudioAGS.cs
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//! \file AudioAGS.cs
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//! \date 2018 Mar 28
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//! \brief AGS32i engine encrypted wave audio.
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//
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// Copyright (C) 2018 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System.ComponentModel.Composition;
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using System.IO;
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namespace GameRes.Formats.Ags32i
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{
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[Export(typeof(AudioFormat))]
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public class AgsAudio : AudioFormat
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{
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public override string Tag { get { return "WAV/AGS32I"; } }
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public override string Description { get { return "AGS32i engine encrypted wave audio"; } }
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public override uint Signature { get { return 0x66424047; } }
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public override bool CanWrite { get { return false; } }
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public AgsAudio ()
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{
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Signatures = new uint[] { 0x66424047, 0 } ;
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}
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public override SoundInput TryOpen (IBinaryStream file)
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{
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uint key = file.Signature ^ 0x46464952u;
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Stream input = new InputCryptoStream (file.AsStream, new Ags32Transform (key));
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input = new SeekableStream (input);
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var header = new byte[12];
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input.Read (header, 0, 12);
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if (!header.AsciiEqual (8, "WAVE"))
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return null;
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input.Position = 0;
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return new WaveInput (input);
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}
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}
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}
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179
Legacy/Ags32i/ImageGSS.cs
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179
Legacy/Ags32i/ImageGSS.cs
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//! \file ImageGSS.cs
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//! \date 2018 Mar 28
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//! \brief AGS32i engine encrypted bitmap.
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//
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// Copyright (C) 2018 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Security.Cryptography;
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using System.Windows.Media;
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using GameRes.Compression;
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using GameRes.Utility;
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// [041001][Innocence] China Chaime+
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namespace GameRes.Formats.Ags32i
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{
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internal class GssMetaData : ImageMetaData
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{
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public uint Key;
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public int DataOffset;
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public int UnpackedSize;
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}
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[Export(typeof(ImageFormat))]
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public class GssFormat : ImageFormat
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{
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public override string Tag { get { return "GSS"; } }
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public override string Description { get { return "AGS32i engine encrypted bitmap"; } }
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public override uint Signature { get { return 0x20575A52; } }
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public GssFormat ()
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{
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Signatures = new uint[] { 0x20575A52, 0 };
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}
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//static readonly uint DefaultKey = 0x20040915;
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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uint key = file.Signature ^ 0x535347u;
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using (var ags = OpenStream (file, key))
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{
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var header = new byte[0x28];
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ags.Read (header, 0, 8);
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if (!header.AsciiEqual ("GSS\0"))
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return null;
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int unpacked_size = header.ToInt32 (4);
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if (unpacked_size <= 0)
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return null;
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using (var bmp = new ZLibStream (ags, CompressionMode.Decompress))
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{
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if (0x28 != bmp.Read (header, 0, 0x28))
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return null;
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int header_length = header.ToInt32 (0);
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if (header_length <= 0 || header_length >= unpacked_size)
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return null;
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return new GssMetaData {
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Width = header.ToUInt32 (4),
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Height = header.ToUInt32 (8),
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BPP = header.ToInt16 (0xE),
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Key = key,
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DataOffset = header.ToInt32 (0),
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UnpackedSize = unpacked_size,
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};
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}
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}
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}
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
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{
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var meta = (GssMetaData)info;
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using (var ags = OpenStream (file, meta.Key))
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{
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var header = new byte[meta.DataOffset];
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ags.Read (header, 0, 8);
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using (var bmp = new ZLibStream (ags, CompressionMode.Decompress))
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{
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bmp.Read (header, 0, header.Length);
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var pixels = new byte[meta.UnpackedSize - meta.DataOffset];
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if (pixels.Length != bmp.Read (pixels, 0, pixels.Length))
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throw new InvalidFormatException();
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PixelFormat format;
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if (32 == meta.BPP)
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format = PixelFormats.Bgra32;
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else if (24 == meta.BPP)
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format = PixelFormats.Bgr24;
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else
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throw new InvalidFormatException();
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int stride = (int)meta.Width * meta.BPP / 8;
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return ImageData.CreateFlipped (info, format, null, pixels, stride);
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}
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}
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}
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public override void Write (Stream file, ImageData image)
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{
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throw new System.NotImplementedException ("GssFormat.Write not implemented");
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}
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Stream OpenStream (IBinaryStream input, uint key)
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{
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var proxy = new ProxyStream (input.AsStream, true);
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return new InputCryptoStream (proxy, new Ags32Transform (key));
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}
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}
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public sealed class Ags32Transform : ICryptoTransform
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{
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readonly uint m_key;
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int m_position;
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const int BlockSize = 4;
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public bool CanReuseTransform { get { return false; } }
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public bool CanTransformMultipleBlocks { get { return true; } }
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public int InputBlockSize { get { return BlockSize; } }
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public int OutputBlockSize { get { return BlockSize; } }
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public Ags32Transform (uint key)
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{
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m_key = key;
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m_position = 0;
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}
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public int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount,
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byte[] outputBuffer, int outputOffset)
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{
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for (int i = 0; i < inputCount; i += 4)
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{
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int rem;
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int div = Math.DivRem ((m_position+i) >> 2, 31, out rem);
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uint t = Binary.RotL (m_key + (uint)div, rem);
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for (int j = 0; j < 4; ++j)
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outputBuffer[outputOffset++] = (byte)((t >> (j << 3)) ^ inputBuffer[inputOffset++]);
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}
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m_position += inputCount;
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return inputCount;
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}
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public byte[] TransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
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{
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byte[] outputBuffer = new byte[inputCount];
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int rem;
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int div = Math.DivRem ((m_position) >> 2, 31, out rem);
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uint t = Binary.RotL (m_key + (uint)div, rem);
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for (int i = 0; i < inputCount; i++)
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{
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outputBuffer[i++] = (byte)((t >> (i << 3)) ^ inputBuffer[inputOffset+i]);
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}
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m_position += inputCount;
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return outputBuffer;
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}
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public void Dispose ()
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{
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}
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}
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}
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