sha256 Match Script [SOLVED]

[wvufantim]

Alright you sudo gurus, I am really tired of copy and pasting sha256 checksums into a text document and matching them up. I was wondering if anybody has a script that could be run to hold the first input and match it to the second input with and output of either yes or no. It may be easy, but I'm not on that level of scripting yet. Thanks in advance.

[JoeFootball]

... and output of either yes or no.

If you're using any Linux released within the past five years or so, have both the ISO and sha256sum.txt files in the same directory, and execute within that directory ...

sha256sum --ignore-missing -c sha256sum.txt

... where it will do the comparison for you, returning OK or Failed.

[rene]

If the want though is to not create said sha256sum.txt file at all this can be easily done using e.g. bash' process substitution using that same by Joe provided method. For example,

~/bin/sha256chk (executable)

Code: Select all

#!/bin/bash
sha256sum -c <(echo $2 $1)

to be used as e.g.

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$ sha256chk foo e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
foo: OK

Feel of course free to swap $1 and $2 is that's the order you want. If you insist on the yes/no thing you'd use the same idea to have e.g.

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#!/bin/bash
sha256sum --status -c <(echo $2 $1) && echo yes || echo no

[1000]

I don't understand a bit.
But maybe such an example will also be good.

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ERROR()
{
	echo "$@" ; exit 1
}

# Download sum
SUM=$(curl -v --silent https://ftp.mozilla.org/pub/firefox/releases/${VERSION_FIREFOX}/SHA256SUMS --stderr - | grep "linux-i686/${LANGUAGE}/firefox-${VERSION_FIREFOX}.tar.bz2" \
| awk '{print $1}')

echo " "
echo "--> Checking the checksum sha256sum"
echo "$SUM firefox-${VERSION_FIREFOX}.tar.bz2" | sha256sum --check  
[ $? == 0 ] || ERROR "--> Downloaded file is broken or sha256sum not exist!"
echo " "

This is only part code of script for download Firefox portable.

[rene]

Mmm. Right. As per 1000, you don't in fact even need the process substitution at all; without argument sha256sum -c reads the sum file from stdin. That's to say then that sha256chk can even just be

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#!/bin/sh
echo $2 $1 | sha256sum -c

in which #!/bin/sh rather than #!/bin/bash is of note.

[wvufantim]

Thanks for the replies!!!

Maybe just a script that compares one number on the first input to the second input to see if it is true or false?

[rene]

[ ... ] a script that compares one number on the first input to the second input to see if it is true or false?

The "input" is not well-defined and a number is not true or false (but e.g. 1, or 2, or...).

I.e., no idea what you're saying. If the above does not do what you need, be explicit as to why not and as to what you want to type and what you want returned.

[altair4]

... I am really tired of copy and pasting sha256 checksums into a text document and matching them up.....

Do you object to the copy and paste part or the manual checking of one number to the other?

There's an app for this you know:

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sudo apt install gtkhash

Looks like this by default:

You still have to copy and paste into the "Check" box if you want a compare.

[wvufantim]

[ ... ] a script that compares one number on the first input to the second input to see if it is true or false?

The "input" is not well-defined and a number is not true or false (but e.g. 1, or 2, or...).

I.e., no idea what you're saying. If the above does not do what you need, be explicit as to why not and as to what you want to type and what you want returned.

Example:
Okay, a script in which you run it:

./compare

echo: What is your number?
Input: 81f375163731864e281b5a704466fff46b74f74d4d1aab8eb65efc1a66709064

echo: What is your compare number?
Input: 81f375163731864e281b5a704466fff46b74f74d4d1aab8eb65efc1a66709064

Output is:
Your numbers are the same! or Your numbers DO NOT MATCH!

[wvufantim]

... I am really tired of copy and pasting sha256 checksums into a text document and matching them up.....

Do you object to the copy and paste part or the manual checking of one number to the other?

There's an app for this you know:

Code: Select all

sudo apt install gtkhash

Looks like this by default:
gtkhash.png

You still have to copy and paste into the "Check" box if you want a compare.

That works!!!! I like the check marks that indicate that they match. Thanks so much.