converting a binary file to HEX representation using batch file

Question

I need to convert a DLL file to HEX representation to use it as a part of string to create a sql server assembly like this

CREATE ASSEMBLY [AssemblyNameHere] FROM 0x4D5A90000300000004000000FFFF000......continue binary data WITH PERMISSION_SET = EXTERNAL_ACCESS

I need this to be in a batch file for many reasons, but it seems that FOR statement only suitable for text files.

npocmaka · Accepted Answer · 2015-01-31 10:58:04Z

16

the easiest way is with CERTUTIL command:

certutil -encodehex c:\myfile.dll myfile.hex

answered Jan 31, 2015 at 10:58

npocmaka

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3 Comments

Esam Bustaty Over a year ago

great tool, but it seems that it was a Windows-Server tool that got introduced to windows 8, so maybe not applicable back when the question was asked, was it?

astraujums Over a year ago

If you want to have raw hexadecimal contents without address column, ASCII representation and spaces between byte values, add "12" to the end of the command line, like this: certutil -encodehex c:\myfile.dll myfile.hex 12

astraujums Over a year ago

Here is the description of various format types that can be used: msdn.microsoft.com/en-us/library/windows/desktop/…

jeb · Accepted Answer · 2011-01-10 15:53:38Z

4

It is not a very good idea to create a hex output with pure batch.

But you could use vbscript or for simple tasks FC.exe could work.

@echo off
SETLOCAL EnableDelayedExpansion
set filesize=%~z1
set "hexVal=41"
set "x10=AAAAAAAAAA"

set /a chunks=1+filesize / 10

del dummy.txt 2>nul > nul
for /L %%n in (0,1,%chunks%) DO (
  <nul >> dummy.txt set /p ".=%x10%"
)

set /a expectedNum=0
for /F "eol=F usebackq tokens=1,2 skip=1 delims=:[] " %%A in (`fc /b "%~dpf1" dummy.txt`) DO (
    set /a num=0x%%A && (
            set /a numDec=num-1
        set "hex=%%B"

        for /L %%n in (!expectedNum!=,=1 !numDec!) DO (
            echo %hexVal%
        )
        set /a expectedNum=num+1
        echo !hex!
    )
)

First I create a file with (nearly) the same length, and then I compare them with FC in binary mode (/B), the output is scanned and if a line missings are detected, they are filled with the hexVal of the x10 string (in this case 0x41='A').

answered Jan 10, 2011 at 15:53

jeb

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2 Comments

Esam Bustaty Over a year ago

Thanks, this works perfectly but it's too slow on relatively large files (36KB), btw when you mentioned vbscript did you mean that there is a command line way to call a script?

aphoria Over a year ago

You can call a VBScript from a batch file like this CSCRIPT MyScript.vbs.

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