Store a file inside of a batch file?

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臣服心动
臣服心动 2020-12-01 22:41

Hi im trying to store a binary file inside of a basic batch script that ive written. Basically i want the script to be able to output this prebuilt file at some point instea

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  • 2020-12-01 23:04

    CERTUTIL

    The foxidriive's answer will work but it can be improved with much more less IO operations. When decoding base64 file certutil cares only about the begin and end tags. Here;s an example that will create and open a small jpg file:

    @echo off
    
    del /q /f pointer.jpg >nul 2>nul
    certutil -decode "%~f0" pointer.jpg
    hh.exe pointer.jpg
    exit /b %errorlevel%
    
    -----BEGIN CERTIFICATE-----
    /9j/4AAQSkZJRgABAgAAZABkAAD/7AARRHVja3kAAQAEAAAAMgAA/+4ADkFkb2Jl
    AGTAAAAAAf/bAIQACAYGBgYGCAYGCAwIBwgMDgoICAoOEA0NDg0NEBEMDg0NDgwR
    DxITFBMSDxgYGhoYGCMiIiIjJycnJycnJycnJwEJCAgJCgkLCQkLDgsNCw4RDg4O
    DhETDQ0ODQ0TGBEPDw8PERgWFxQUFBcWGhoYGBoaISEgISEnJycnJycnJycn/8AA
    EQgACgAKAwEiAAIRAQMRAf/EAFsAAQEBAAAAAAAAAAAAAAAAAAAGBwEBAQAAAAAA
    AAAAAAAAAAAAAAEQAAIBAwQDAAAAAAAAAAAAAAEDAgARBSExIwQSIhMRAQEBAAAA
    AAAAAAAAAAAAAAARIf/aAAwDAQACEQMRAD8A13PZ5eIX3gO8ktKZfFPksvQ8r4uL
    ecJmx1BMSbm8D6UVKVcg/9k=
    -----END CERTIFICATE-----
    

    IEXPRESS

    You can use IEXPRESS to create self-extracting executable that packs the needed binaries ,a bat file and execute the packed file. You can use directives or the defauled UI mode by just invoking the command.

    Alternate data streams

    you can store data in an alternate data stream and then read it with powershell. Mind that most text editors will remove the ADS:

    @echo off
    del new.jpg /f /q >nul 2>&1
    chcp  65001
    type pointer.jpg >"%~f0:bindata"
    powershell "$data=Get-Content -path """%~f0"""  -stream bindata;Out-File -FilePath '.\new.jpg' -InputObject $data -Encoding unicode;"
    exit /b %errorlevel%
    
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  • 2020-12-01 23:11

    You could simply append the binary part to your batch file with COPY.

    copy /a batchBin.bat + /b myBinaryFile.bin /b combined.bat
    

    batchBin.bat (The last line with exit /b should end with a newline)

        ;;;===,,,@echo off
        ;;;===,,,echo line2
        ;;;===,,,findstr /v "^;;;===,,," "%~f0" > output.bin
        ;;;===,,,exit /b
    

    The key is the findstr command, it outputs all lines not beginning with ;;;===,,,.
    And as each of them are standard batch delimiters, they can be prefix any command in a batch file in any combination.

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  • 2020-12-01 23:17

    If the target machine is Vista and higher then you can use certutil.exe and create a base64 encoded text, which you can embed within the batch file.

    This example has a base64 encoded file that is just a single space, but the technique is the same with larger binaries.

    This batch file uses certutil.exe to decode the certificate and data and create the file with a single space in it, no carriage return or line feed.

    @echo off
    (
    echo -----BEGIN CERTIFICATE-----
    echo IA==
    echo -----END CERTIFICATE-----
    )>file.tmp
    certutil -decode file.tmp "file with a single space.txt" >nul
    del file.tmp
    

    To encode a program file for placing inside the batch file you use a command line like this, replacing myprogram.exe with your program name:

    certutil -encode -f "myprogram.exe" file.tmp
    

    and then place the contents of file.tmp inside the batch file:

    @echo off
    (
    echo -----BEGIN CERTIFICATE-----
    echo place the data from file.tmp here
    echo as it is listed inside the file
    echo -----END CERTIFICATE-----
    )>file.tmp
    certutil -decode file.tmp "myprogram.exe" >nul
    del file.tmp
    

    It's fairly easy to add the echo to the front of each line and then use the data from file2.tmp:

    @echo off
    for /f "delims=" %%a in (file.tmp) do >>file2.tmp (echo(echo %%a)
    
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  • 2020-12-01 23:25

    Read about HERE documents. Msdos batch does not offer them, but perl and ruby are both available and do.

    http://en.wikipedia.org/wiki/Here_document

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