IBM AIX: Calculate the SHA256 hashes of a directory without sha256sum

echo '#! /usr/bin/ksh\necho `cat $1 | openssl dgst -sha256` $1' > sslsha256; chmod +x sslsha256; find directory -type f -exec ./sslsha256 \{\} \;

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.

Sample Output

6e94b0b7fc2805ad558f8039ed038a6272f61846eaa5f4931abd826193c78b83 cognos-installers/TM1-952-AIX/952_FP2_aix.tar.gz
c9d0f04ad6f86482bf4c41ba7a303e0d8a0e8c96c9c9492bc518d2a2bc0166c7 cognos-installers/TM1-952-AIX/952_FP2_HF6_aix.tar.gz
46ede3255abff4e356b002a9cd12df259275a15910768997bfbbae3c637b7f32 cognos-installers/TM1-952-windows/TM1_9.5.2_Windows_x64.7z
92faf20dd3ff25d2c8d94308f03fd8477d0980d6b740baa96a8e79b30b49456f cognos-installers/TM1-952-windows/TM1_Workflow_9.5.2_Windows_x64.7z
630a66a1f7cc3044f370cec730820d73d66cb284a2a09e197c00f82d6900d932 cognos-installers/cognos-BI-102/cognos-FM/fm_10.2_win_ml.tar.xz

By: RAKK

2013-09-18 17:37:50

chmod echo find find unix aix sha256sum

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loanabilly · 7 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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