In the previous post I showed an example on how to use fusion APIs to get the full display name of a given assembly.

This time I am going to show a similar example. Instead of showing the full display name, we will show the display name broken up into attributes and values.

//
//  EnumIdAttr.cpp
//
//  Enumerate the identity attributes of a given assembly.
//

#include "fusion.h"
#include "windows.h"
#include "stdio.h"
#include "mscoree.h"
#include "isolation.h"

typedef HRESULT (__stdcall *PFNGETREF)(LPCWSTR pwzFile, REFIID riid, IUnknown **ppUnk);
typedef HRESULT (__stdcall *PFNGETAUTH)(IIdentityAuthority **ppIIdentityAuthority);

PFNGETREF                   g_pfnGetAssemblyIdentityFromFile = NULL;
PFNGETAUTH                  g_pfnGetIdentityAuthority = NULL;
IUnknown                    *g_pUnk = NULL;

bool Init()
{
    HRESULT     hr = S_OK;
    DWORD       dwSize = 0;
    bool        bRC = false;
   
    hr = CorBindToRuntimeEx(NULL, L"wks", 0, CLSID_CorRuntimeHost, IID_ICorRuntimeHost, (void **)&g_pUnk);
    if(FAILED(hr)) {
        printf("Error: Failed to initialize CLR runtime! hr = 0x%0x\n", hr);
        goto Exit;
    }
  
    if (SUCCEEDED(hr)) {
        hr = GetRealProcAddress("GetAssemblyIdentityFromFile", (VOID **)&g_pfnGetAssemblyIdentityFromFile);
    }

    if (SUCCEEDED(hr)) {
        hr = GetRealProcAddress("GetIdentityAuthority", (VOID **)&g_pfnGetIdentityAuthority);
    }

    if (!g_pfnGetAssemblyIdentityFromFile || !g_pfnGetIdentityAuthority) {
        printf("Error: Cannot get required APIs from fusion.dll!\n");
        goto Exit;
    }

    bRC = true;

Exit:
    return bRC;
}

void Shutdown()
{
    if(g_pUnk) {
        g_pUnk->Release();
        g_pUnk = NULL;
    }
}

void Usage()
{
    printf("EnumIdAttr: A tool to enumerate the identity attributes of a given assembly.\n\n");
    printf("Usage: EnumIdAttr AsmFilePath\n");
    printf("\n");
}

int _cdecl wmain(int argc, LPCWSTR argv[])
{
    int     iResult = 1;
    IUnknown            *pUnk = NULL;
    IReferenceIdentity  *pRef = NULL;
    HRESULT             hr = S_OK;  
    IEnumIDENTITY_ATTRIBUTE     *pEnum = NULL;
    BYTE                        abData[1024];
    DWORD                       cbAvailable;
    DWORD                       cbUsed;
    IDENTITY_ATTRIBUTE_BLOB     *pBlob;

    if(argc != 2) {
        Usage();
        goto Exit;
    }

    if(!Init()) {
        printf("Failure initializing EnumIdAttr.\n");
        goto Exit;
    }

    hr = g_pfnGetAssemblyIdentityFromFile(argv[1], __uuidof(IReferenceIdentity), &pUnk);
    if (FAILED(hr)) {
        printf("GetAssemblyIdentityFromFile failed with hr = 0x%x", hr);
        goto Exit;
    }

    hr = pUnk->QueryInterface(__uuidof(IReferenceIdentity), (void**)&pRef);
    if (FAILED(hr)) {
        goto Exit;
    }

    hr = pRef->EnumAttributes(&pEnum);
    if (FAILED(hr)) {
        printf("IReferenceIdentity::EnumAttributes failed with hr = 0x%x", hr);
        goto Exit;
    }

    pBlob = (IDENTITY_ATTRIBUTE_BLOB *)(abData);
    while (1) {
        cbAvailable = sizeof(abData);
        hr = pEnum->CurrentIntoBuffer(cbAvailable, abData, &cbUsed);
        if (FAILED(hr)) {
            printf("IEnumIDENTITY_ATTRIBUTE::CurrentIntoBuffer failed with hr = 0x%x", hr);
            goto Exit;
        }

        if (! cbUsed) {
            break;
        }

        LPWSTR pwzName = (LPWSTR)(abData + pBlob->ofsName);
        LPWSTR pwzValue = (LPWSTR)(abData + pBlob->ofsValue);
        printf("%ws = %ws\n", pwzName, pwzValue);

        hr = pEnum->Skip(1);
        if (FAILED(hr)) {
            printf("IEnumIDENTITY_ATTRIBUTE::Skip failed with hr = 0x%x", hr);
            goto Exit;
        }
    }

    iResult = 0;

Exit:

    Shutdown();

    if (pUnk) {
        pUnk->Release();
    }

    if (pRef) {
        pRef->Release();
    }

    if (pEnum) {
        pEnum->Release();
    }

    return iResult;
}

Sample output:

D:\>enumidattr.exe d:\WINDOWS\microsoft.net\Framework\v2.0.50727\system.dll
Culture = neutral
name = System
processorArchitecture = MSIL
PublicKeyToken = b77a5c561934e089
Version = 2.0.0.0