Windows 我可以在链接库中钩住函数吗？ 使用EasyHook，我成功地钩住了各种C++类的导出函数和已知的VTABLE函数。在所有这些情况下，目标程序都使用了DLL

如果我知道一个函数入口点的地址，当一个库链接到目标程序中而不是作为一个单独的库时，是否也可以这样做？

看起来，您可以钩住任何地址可计算的子例程

在我的例子中，挂接静态链接的SSL_读取和SSL_写入就像用我最喜欢的调试器识别偏移量，然后安装挂接一样简单

// delegate for EasyHook:
[UnmanagedFunctionPointer(CallingConvention.Cdecl, 
    SetLastError = true, CharSet = CharSet.Ansi)]
delegate Int32 SLL_readDelegate(IntPtr SSL_ptr, IntPtr buffer, Int32 length);

// import SSL_read (I actually did it manually, but this will work in most cases)
/* proto from ssl_lib.c -> int SSL_read(SSL *s,void *buf,int num) */
[DllImport("ssleay32.dll", SetLastError = true)]
public static extern Int32 SSL_read(IntPtr ssl, IntPtr buffer, Int32 len);

// the new routine
static Int32 SSL_readCallback(IntPtr SSL_ptr, IntPtr buffer, Int32 length)
{
    /* call the imported SSL_read */
    int ret = SSL_read(SSL_ptr, buffer, length);
    /* TODO: your code here, e.g:
     * string log_me = Marshal.PtrToString(buffer, ret);
     */
    return ret;
}

现在只剩下安装挂钩了：

private LocalHook sslReadHook;

public void Run(RemoteHooking.IContext InContext, String InArg1)
{
    // ... initialization code omitted for brevity

    /* the value for ssl_read_addr is made up in this example
     * you'll need to study your target and how it's loaded(?) to 
     * identify the addresses you want to hook
     */
    int ssl_read_addr = 0x12345678; /* made up for examples sake */
    sslReadHook = LocalHook.Create(new IntPtr(ssl_read_addr),
        new SSL_readDelegate(SSL_readCallback), this);

    // ...
}

我应该提到，在本例中，您需要libeay32.dll和ssleay32.dll，因为后者依赖于前者

钓得开心