Checksum verification

JaredBusch

I need to verify the sha256 checksum of a file..

This is easy to see sha256sum filename.ext will output it.

But I don't want to manually compare each character.

The website just lists the hash as text on the screen. So if I want to get an ok, i need to copy it and make a file.. /sigh..

Am I missing something? If there a switch that accepts the hash on the command line?

1337

Maybe something like this?

echo 'a5a13fa3cce0127a4fb3dc211c58f36437e27f504cf64a9f13233b08d63791ba  snomPA1-8.7.5.75-SIP-f.bin' | sha256sum -c

stacksofplates

Is it just the checksum on a page or is there content around the checksum?

JaredBusch

Example: Snom PA1 firmware page: http://wiki.snom.com/Firmware/V8_7_5_75_MRU_PA1

wget http://downloads.snom.com/fw/snomPA1-8.7.5.75-SIP-f.bin

but then I need to build a checksum file....

echo "a5a13fa3cce0127a4fb3dc211c58f36437e27f504cf64a9f13233b08d63791ba snomPA1-8.7.5.75-SIP-f.bin" > test256.sum

Then I can test it.

sha256sum snomPA1-8.7.5.75-SIP-f.bin -c test256.sum 
sha256sum: snomPA1-8.7.5.75-SIP-f.bin: no properly formatted SHA256 checksum lines found
snomPA1-8.7.5.75-SIP-f.bin: OK

JaredBusch

@stacksofplates said in Checksum verification:

Is it just the checksum on a page or is there content around the checksum?

on a page as you can see.

stacksofplates

@JaredBusch said in Checksum verification:

@stacksofplates said in Checksum verification:

Is it just the checksum on a page or is there content around the checksum?

on a page as you can see.

that wasn't here when I asked. There's not a way as far as I know but I think you can do this:

#!/usr/bin/env bash

sum=$1
file=$2

file_sum=$(sha256sum $file | awk '{print $1 }')

diff <(echo $1) <(echo "$file_sum")

Then just do script.sh copiedSum file.txt

stacksofplates

Not elegant, but I don't personally know of another way. If you don't get output, they are the same.

JaredBusch

@stacksofplates said in Checksum verification:

that wasn't here when I asked.

Right, I know. I meant that as in now there is an example as you can see it is jsut on the page...

stacksofplates

@JaredBusch said in Checksum verification:

@stacksofplates said in Checksum verification:

that wasn't here when I asked.

Right, I know. I meant that as in now there is an example as you can see it is jsut on the page...

Ah thought maybe I was getting some sarcasm. My bad.

JaredBusch

@stacksofplates said in Checksum verification:

@JaredBusch said in Checksum verification:

@stacksofplates said in Checksum verification:

Is it just the checksum on a page or is there content around the checksum?

on a page as you can see.

that wasn't here when I asked. There's not a way as far as I know but I think you can do this:
#!/usr/bin/env bash

sum=$1
file=$2

file_sum=$(sha256sum $file | awk '{print $1 }')

diff <(echo $1) <(echo "$file_sum")
Then just do script.sh copiedSum file.txt

Damn. well i guess I could go find the md5/sh256 code and submit a pull req.. but bleh.. so much work.

1337

Maybe something like this?

echo 'a5a13fa3cce0127a4fb3dc211c58f36437e27f504cf64a9f13233b08d63791ba  snomPA1-8.7.5.75-SIP-f.bin' | sha256sum -c

JaredBusch

@stacksofplates said in Checksum verification:

@JaredBusch said in Checksum verification:

@stacksofplates said in Checksum verification:

that wasn't here when I asked.

Right, I know. I meant that as in now there is an example as you can see it is jsut on the page...

Ah thought maybe I was getting some sarcasm. My bad.

S'ok, I can see I worded it badly.

1337

Did the piping example I posted above satisfy your switch requirement even though it isn't a switch?

Or maybe you're looking for something else?

JaredBusch

@Pete-S said in Checksum verification:

Did the piping example I posted above satisfy your switch requirement even though it isn't a switch?

Or maybe you're looking for something else?

Was busy dealing with the firmware update itself.
Yes. That works simply enough. Still annoyed that they don't have a switch..

Solved Checksum verification