Thread: Printing out the names of implicitly linked dll's from .idata section in a PE file

I am trying to write a code which is supposed to print out the names of all the imported dll's in the exe by using the 'name' field of the IMAGE_IMPORT_DESCRIPTOR structure in the .idata section of the exe, but the program seems to be getting stuck in an infinite loop. Can someone please tell me how to get the names printed out correctly...

Code:

    #include<iostream>
    #include<Windows.h>
    #include<stdio.h>
    #include<WinNT.h>

    int main()
    {
        FILE *fp; 
        int i;

        if((fp = fopen("c:\\Linked List.exe","rb"))==NULL)
            std::cout<<"unable to open";


        IMAGE_DOS_HEADER imdh;
        fread(&imdh,sizeof(imdh),1,fp);
        fseek(fp,imdh.e_lfanew,0);

        IMAGE_NT_HEADERS imnth;
        fread(&imnth,sizeof(imnth),1,fp);

        IMAGE_SECTION_HEADER *pimsh;
        pimsh = (IMAGE_SECTION_HEADER *)malloc(sizeof(IMAGE_SECTION_HEADER) * imnth.FileHeader.NumberOfSections);

        long t;

        fread(pimsh,sizeof(IMAGE_SECTION_HEADER),imnth.FileHeader.NumberOfSections,fp);

        for(i=0;i<imnth.FileHeader.NumberOfSections;i++)
        {
            if(!strcmp((char *)pimsh->Name,".idata"))
                t = pimsh->PointerToRawData;
            pimsh++;
        }

        fseek(fp,t,0);

        IMAGE_IMPORT_DESCRIPTOR iid;
        char c;

        while(1)
        {
            fread(&iid,sizeof(iid),1,fp);

            if(iid.Characteristics == NULL)
                break;

            t = ftell(fp);

            fseek(fp,(long)iid.Name,0);

            while(c=fgetc(fp))
                printf("%c",c);
            printf("\n");

            fseek(fp,t,0);

        }
    }

Originally Posted by oogabooga

Get this tool, FileAlyzer. When installed, it adds a right-click menu item "Analyze with FileAlyzer". It shows the file in hex, lets you search for strings (right-click, pick "Scan for strings", then pick the Filenames tab at the right) and most helpfully for your needs, shows the MZ and PE headers and also the PE Imports, etc.

Using it I found that the strings you want exist at iid.Name - 74752 (0x12400). However, I can't see where that number is stored

Thanks for the tip, I can carry on from here.