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QMCTrans

QQ音乐解码程序, 针对加密的qmcflac,qmc0,qmc3文件进行解密,用C#重写了。带GUI界面。现添加对mflac的实验性支持, 仅供交流学习使用。

参考: https://github.com/MegrezZhu/qmcdump

2020/04/21 Update:

添加对mflac文件的支持,修复小bug。 参考:https://github.com/ix64/unlock-music/wiki 对mflac文件的说明。

下面给出几点对Key,也就是掩码的说明:

  • Key的真实有效位数只有里面44个Byte
  • Key有周期性,周期为128Byte
  • Key有对称性,满足对称关系:Key[i] = Key[128-i] i>=1

文件尾部是一个结构体,包含有Key的信息,但是现在无法解密。 结构体如下:

struct KeyINFO{
    string Base64EncryptedKeyInfo;
    Uint32 sizeofBase64EncryptedKeyInfo;
}

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