This project can help decrypt cocos2d's asset
like *.pvr.ccz files.
*.pvr.ccz file has "CCZp" 43 43 5A 70 header.
key size is 16byte(4byte * 4key)
hook or static/dynamic disassemble these functions
cocos2d::ZipUtils::setPvrEncryptionKeyPart(int,uint)
cocos2d::ZipUtils::setPvrEncryptionKey(uint,uint,uint,uint)example
All platform is supported (Windows/Linux/macOS)
$ dotnet run