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43 lines
1.4 KiB
C#
43 lines
1.4 KiB
C#
using System;
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using System.Diagnostics;
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using System.IO;
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using Joveler.Compression.ZLib;
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namespace DotNetCTFDumper.Utils
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{
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public static class Decompressor
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{
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public static byte[] Decompress(ByteReader exeReader, out int decompressed)
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{
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Int32 decompSize = exeReader.ReadInt32();
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Int32 compSize = exeReader.ReadInt32();
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decompressed = decompSize;
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return decompress_block(exeReader, compSize, decompSize);
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}
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public static ByteReader DecompressAsReader(ByteReader exeReader, out int decompressed)
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{
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Int32 decompSize = exeReader.ReadInt32();
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Int32 compSize = exeReader.ReadInt32();
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decompressed = decompSize;
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return new ByteReader(decompress_block(exeReader,compSize,decompSize));
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}
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public static byte[] decompress_block(ByteReader reader, int size, int decompSize)
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{
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ZLibDecompressOptions decompOpts = new ZLibDecompressOptions();
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MemoryStream compressedStream = new MemoryStream(reader.ReadBytes(size));
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MemoryStream decompressedStream = new MemoryStream();
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using (ZLibStream zs = new ZLibStream(compressedStream, decompOpts))
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{
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zs.CopyTo(decompressedStream);
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}
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return decompressedStream.GetBuffer();
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}
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}
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} |