我如何＃包括使用加密字符串的文件？ [英] How can I #include a file with encrypted string?

问题描述

我写在Windows上一个C程序使用MinGW / GCC。我需要使用#include指令，包括一个包含加密的字符串的文件。该字符串将在运行时解密。我想这样做，因此，如果寻找与十六进制编辑器可执行文件中的字符串是不可见的。

I am writing a C app on Windows with MinGW/gcc. I need to use the #include directive to include a file that contains an encrypted string. The string will be decrypted at runtime. I want to do this so the string will not be visible if looking at the executable with a hex editor.

我想这一点，但它不工作。你的想法，虽然：

I tried this, but it doesn't work. You get the idea, though:

char *hidden_str =
#include "encrypted_text.dat"

有可能转义东西在那里的混淆编译器。我不知道。我不知道这是加密后会发生什么吧。

There may be unescaped stuff in there that's confusing the compiler. I don't know. I don't know what happens to it after it's encrypted.

如果有这更好的方法，我接受它。

If there's a better approach to this, I'm open to it.

推荐答案

如果你安装了，当你安装了MinGW的，你应该能够访问一个名为的 XXD ，这需要一个文件的十六进制转储。通过使用 -i 命令行标志，就可以得到它的输出C-友好的文件，你可以方便地导入。

If you installed and configured MSYS when you installed MinGW, you should have access to a command called xxd, which takes a hex dump of a file. By using the -i command line flag, you can get it to output a C-friendly file which you can easily import.

一个例子电话是：

xxd -i in_file output.h

中的内容 output.h 然后将如下所示：

unsigned char in_file[] = {
  0x68, 0x65, 0x6c, 0x6c, 0x6f
};
unsigned int in_file_len = 5;

您就可以包含这个文件到您的C源$ C ​​$ c和访问它：

You can then include that file into your C source code and have access to it:

#include "output.h"

unsigned int i;
for(i = 0; i < in_file_len; i++)
{
    printf("%c", in_file[i]);
}

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