如何注入 .NET 代码来更改函数的返回值

发布于 2024-07-17 00:42:57 字数 415 浏览 7 评论 0原文

我目前正在研究如何编写可以注入另一个 .NET 进程并覆盖函数返回值的 .NET 代码。我的想法是，我的代码将更改方法调用的返回值，如下所示：

Public Function DoSomething() As String

Return "Value"

End Function

我的代码将拦截对 DoSomething() 的调用并返回我自己的自定义字符串，而不是“Value”。

我猜想我需要使用 .NET Profiling API 来完成此类事情。有没有人有使用 Profiling API 的经验，如果有的话，您认为这种代码注入是否可能？

我不打算将其用于任何恶意行为，我只是有兴趣在 .NET 中尝试一些非常低级的东西，看看是否可以完成。

干杯。贾斯。

原文

I am currently researching how to write .NET code that can be injected into another .NET process and override function return values. The idea is that my code would alter the return values of a method call, like this:

Public Function DoSomething() As String

Return "Value"

End Function

My code would intercept calls to DoSomething() and return my own custom string, rather then "Value".

I'm guessing that I would need to look o using the .NET Profiling API to do this type of thing. Does anyone have experience of using the Profiling API, and if so, do you think that this code injection is possible?

I don't intend to use this for anything malicious, I'm just interested in trying something very low-level in .NET to see if it can be done.

Cheers.
Jas.

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薆情海 2024-07-24 00:42:57

您可以使用 TypeMock 隔离器来完成此操作。

我没有 TypeMock，但根据他们的一些示例，我认为你可以用这样的东西来做到这一点：（首先是C#，然后我会尝试翻译成VB）

using (RecordExpectations recorder = RecorderManager.StartRecording())
{
    DoSomething();
    recorder.Return("My Own Custom String");
}

Using recorder As RecordExpectations = RecorderManager.StartRecording()
    DoSomething
    recorder.Return("My Own Custom String")
End Using

看起来TypeMock对于开源项目是免费的，否则它需要花钱。但他们已经为您完成了 Profiling API 编码，因此您可以担心解决问题，而不是编写繁琐的 C++。

You can do this using TypeMock Isolator.

I don't have TypeMock, but based on some of their examples, I think you could do it with something like this: (C# first, then I'll try to translate to VB)

using (RecordExpectations recorder = RecorderManager.StartRecording())
{
    DoSomething();
    recorder.Return("My Own Custom String");
}

Using recorder As RecordExpectations = RecorderManager.StartRecording()
    DoSomething
    recorder.Return("My Own Custom String")
End Using

Looks like TypeMock is free for open-source projects, otherwise it costs money. But they've already done the Profiling API coding for you, so you can worry about solving your problem, not about writing hairy C++.

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