与程序集加载相反的操作(byte [] rawAssembly) [英] Opposite operation to Assembly Load(byte[] rawAssembly)

问题描述

我注意到有一个 System.Reflection.Assembly 方法，它是 Assembly Load(byte [] rawAssembly).

I notice that there is a method of System.Reflection.Assembly, which is Assembly Load(byte[] rawAssembly).

我想知道是否有相反的操作，例如 byte [] Store(Assembly assembly).如果没有，如何将装配对象转换为 byte [] ，以完全在内存中调用 Assembly Load(byte [] rawAssembly)而不将装配写到文件中?谢谢！

I wonder if there is an opposite operation like byte[] Store(Assembly assembly). If not, how can I convert an assembly object to byte[] for calling Assembly Load(byte[] rawAssembly) totally in memory without writing the assembly to a file? Thanks!

注释:问题来自以下情况:我正在使用第三方库，该库将一个Assembly实例返回给我，并且我必须使用反射来调用其方法.我不知道该库如何创建此程序集对象.我只是想知道是否可以将程序集对象存储到byte []并用'Assembly Load(byte [] rawAssembly)'重新加载它.谢谢！

Comment: The question comes from the situation that I am using a third-party library which returns an Assembly instance to me, and I must use reflection to call its methods. I don't know how the library creates this assembly object. I just wonder if I can store the assembly object to byte[] and reload it with 'Assembly Load(byte[] rawAssembly)'. Thanks!

推荐答案

System.Security.Policy.Hash能够计算哈希值，而与程序集的位置无关.因此，我们至少有两种方法可以将程序集获取为字节数组:

System.Security.Policy.Hash is able to calculate a Hash regardless of the assembly's location. So we have at least 2 ways to obtain an assembly as a byte array:

1)使用反射:

var hash = new Hash(assembly);
var dllAsArray = (byte[]) hash.GetType()
    .GetMethod("GetRawData", BindingFlags.Instance | BindingFlags.NonPublic)
    .Invoke(hash, new object[0]);

2)使用伪造的HashAlgorithm实现:

2) Using a fake HashAlgorithm implementation:

public class GetWholeBodyPseudoHash : HashAlgorithm
{
    protected override void Dispose(bool disposing)
    {
        if(disposing) _memoryStream.Dispose();
        base.Dispose(disposing);
    }

    static GetWholeBodyPseudoHash()
    {
        CryptoConfig.AddAlgorithm(typeof(GetWholeBodyPseudoHash), typeof(GetWholeBodyPseudoHash).FullName);
    }

    private MemoryStream _memoryStream=new MemoryStream();
    public override void Initialize()
    {
        _memoryStream.Dispose();
        _memoryStream = new MemoryStream();
    }

    protected override void HashCore(byte[] array, int ibStart, int cbSize)
    {
        _memoryStream.Write(array, ibStart, cbSize);
    }

    protected override byte[] HashFinal()
    {
        return _memoryStream.ToArray();
    }
}

...
var bytes = new Hash(yourAssembly).GenerateHash(new GetWholeBodyPseudoHash());

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