Get-Filehash SHA256 encryption in powershell drops last 4 digits when run from a batch file

Question

When I run the Get-Filehash from powershell it works however:

When I run it from a batch file, it drops last 4 digits.

powershell.exe -NoProfile -ExecutionPolicy -Command "Get-FileHash filename.edi -Algorithm SHA256 | Out-File c:\app\testfileout.txt"

Algorithm       Hash                                                           
---------       ----                                                           
SHA256          3EFEC59BFB0573061C5CD2F72A684663B60CA3D0D91C67CBDBBE366A59FE...

How do I get the output file to ONLY be:

3EFEC59BFB0573061C5CD2F72A684663B60CA3D0D91C67CBDBBE366A59FE4A8F

Which gives me the full hash inside Powershell when I run this:

Get-FileHash filename.edi -Algorithm SHA256 | Out-File c:\app\testfileout.txt

I need just the hash without the headers as well as the final 4 digits.

Does anyone have a script that already does this?

cmd.exe, despite appearances, is not DOS.

Bill_Stewart
– Bill_Stewart

2017-06-01 21:33:06 +00:00
Commented Jun 1, 2017 at 21:33 — Bill_Stewart
– Bill_Stewart, Commented Jun 1, 2017 at 21:33

thepip3r · Accepted Answer · 2017-06-01 21:02:04Z

2

It returns an object so all you need to do is use Select-Object with ExpandProperty:

powershell.exe -NoProfile -ExecutionPolicy -Command "Get-FileHash filename.edi -Algorithm SHA256 | Select-Object -ExpandProperty Hash | Out-File c:\app\testfileout.txt"

or reference the object property by dot notation:

powershell.exe -NoProfile -ExecutionPolicy -Command "(Get-FileHash filename.edi -Algorithm SHA256).Hash | Out-File c:\app\testfileout.txt"

answered Jun 1, 2017 at 21:02

thepip3r

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aschipfl · Accepted Answer · 2017-06-01 22:17:21Z

1

With pure cmd, you can do it like this:

cmd /V /C for /F "tokens=*" %H in ('certutil -hashfile "filename.edi" SHA256 ^^^| find /V ":"') do @(set "HASH=%H" ^& echo !HASH: =!) > "C:\app\testfileout.txt"

In a batch-file, it may look like this:

setlocal EnableDelayedExpansion
for /F "tokens=*" %%H in ('
    certutil -hashfile "filename.edi" SHA256 ^| find /V ":"
') do @(
    set "HASH=%%H" & echo !HASH: =!
) > "C:\app\testfileout.txt"
endlocal

answered Jun 1, 2017 at 22:17

aschipfl

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