图片异或加密的问题 - V2EX
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heyhumor

图片异或加密的问题

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  •   heyhumor Jun 30, 2021 2424 views
    This topic created in 1781 days ago, the information mentioned may be changed or developed.

    图片异或加密是从头开始吗?文件头又是从哪里开始?参考下面外链 https://www.kanxue.com/question-read-801163.htm

    8 replies    2021-07-02 11:50:18 +08:00
    heyhumor
        1
    heyhumor  
    OP
       Jun 30, 2021
    野生程序员,确实没什么 C++基础,望指导~
    wms
        2
    wms  
       Jun 30, 2021
    你得把 程序和密文发出来啊,就这一段反汇编代码, 怎么分析啊?
    heyhumor
        3
    heyhumor  
    OP
       Jun 30, 2021
    @wms 密文就是里面的字符串,异或之后 v4 的值是 0x0B,程序还真没有,在这硬看呢。。
    wms
        4
    wms  
       Jun 30, 2021
    二进制没有,图片文件呢?
    liuidetmks
        5
    liuidetmks  
       Jun 30, 2021 via iPhone
    你直接把原始图片和加密后的图片再异或一下,是不是就能还原出异或的 key?

    不知道为嘛用异或来加密图片
    heyhumor
        6
    heyhumor  
    OP
       Jul 1, 2021
    @liuidetmks 原始图片是在程序里面显示的,没办法保存成实体,所以就只有密文,不可能三者公布其二的。
    ysc3839
        7
    ysc3839  
       Jul 1, 2021 via Android
    没有源程序,所以你是在帮别人解决问题?建议对方直接来这里问,把源程序发出来。
    另外我个人也不喜欢帮中间人解决问题,我花时间解决了,你把答案复制过去,功劳归你?假如还有奖金呢?
    heyhumor
        8
    heyhumor  
    OP
       Jul 2, 2021
    @ysc3839 哈哈不会,源程序是个系统,但是 dll 我有,就是不知道怎么放上去。一直被传入的地址指针困惑,后来发现解密后还要改文件头,图片就可以正常显示了。谢谢回答
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