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Commands tagged sha256sum from sorted by
Terminal - Commands tagged sha256sum - 2 results
echo '#! /usr/bin/ksh\ncat $2 | openssl dgst -sha256 | read hashish; if [[ $hashish = $1 ]]; then echo $2: OK; else echo $2: FAILED; fi;' > shacheck; chmod +x shacheck; cat hashishes.sha256 | xargs -n 2 ./shacheck;
2013-09-18 21:51:20
User: RAKK
Functions: cat chmod echo read xargs
0

This command is used to verify a sha256sum-formatted file hash list on IBM AIX or any other UNIX-like OS that has openssl but doesn't have sha256sum by default. Steps:

1: Save to the filesystem a script that:

A: Receives as arguments the two parts of one line of a sha256sum listing

B: Feeds a file into openssl on SHA256 standard input hash calculation mode, and saves the result

C: Compares the calculated hash against the one received as argument

D: Outputs the result in a sha256sum-like format

2: Make the script runnable

3: Feed the sha256sum listing to xargs, running the aforementioned script and passing 2 arguments at a time

echo '#! /usr/bin/ksh\necho `cat $1 | openssl dgst -sha256` $1' > sslsha256; chmod +x sslsha256; find directory -type f -exec ./sslsha256 \{\} \;
2013-09-18 17:37:50
User: RAKK
Functions: chmod echo find
0

This command is for producing GNU sha256sum-compatible hashes on UNIX systems that don't have sha256sum but do have OpenSSL, such as stock IBM AIX.

1.- Saves a wrapper script for UNIX find that does the following:

A.- Feeds a file to openssl on SHA256 hash calculation mode

B.- Echoes the output followed by the filename

2.- Makes the file executable

3.- Runs find on a directory, only processing files, and running on each one the wrapper script that calculates SHA256 hashes

Pending is figuring out how to verify a sha256sum file on a similar environment.