/// <summary>
/// 解压并写入文件
/// </summary>
/// <param name="copyWrite"></param>
/// <param name="qqwry"></param>
/// <param name="path"></param>
private static void ExtractWriteDbFile(QQWryCopyWrite copyWrite, byte[] qqwry, string path)
{
//extract information from copywrite.rar
if (qqwry.Length <= 24 || copyWrite.Sign != "CZIP")
{
throw new Exception("-2 sign error");
}
if (qqwry.Length != copyWrite.Size)
{
throw new Exception("-4 size error");
}
//decrypt
var head = new byte[0x200];
var key = copyWrite.Key;
for (var i = 0; i < 0x200; i++)
{
key = (key * 0x805 + 1) & 0xff;
head[i] = (byte)(qqwry[i] ^ key);
}
Array.Copy(head, 0, qqwry, 0, head.Length);
var dataBuffer = new byte[4096];
//decompress
using (var inflaterInputStream = new InflaterInputStream(new MemoryStream(qqwry)))
{
//write file
using (var fsOut = File.Create(path))
{
//inflaterInputStream.CopyTo(fsOut);
StreamUtils.Copy(inflaterInputStream, fsOut, dataBuffer);
}
}
}
private static QQWryCopyWrite ReadFromStream(Stream copywriteStream)
{
var binaryReader = new BinaryReader(copywriteStream);
var copyWrite = new QQWryCopyWrite()
{
Sign = Encoding.GetEncoding("gb2312").GetString(binaryReader.ReadBytesLE(4).Where(x => x != 0x00).ToArray()),
Version = binaryReader.ReadUInt32LE(),
Unknown1 = binaryReader.ReadUInt32LE(),
Size = binaryReader.ReadUInt32LE(),
Unknown2 = binaryReader.ReadUInt32LE(),
Key = binaryReader.ReadUInt32LE(),
Text = Encoding.GetEncoding("gb2312").GetString(binaryReader.ReadBytesLE(128).Where(x => x != 0x00).ToArray()),
Link = Encoding.GetEncoding("gb2312").GetString(binaryReader.ReadBytesLE(128).Where(x => x != 0x00).ToArray())
};
return(copyWrite);
}
