oxo @oxo@qoto.org

Shift rows in the pocket!
#linux #bash #shell #script #aes #rijndael #encryption

https://codeberg.org/oxo/tool/src/branch/main/dev/aes

The substitution box, one of the steps in key scheduling for the Rijndael cipher, is working.

The table is in hexadecimal, therefore some sub-optimal conversion is going on. But it works for now.

Still far away from fully working, but I am still making good progress each time I work on this project.

Next up: bitwise row and column shifting.

https://codeberg.org/oxo/tool/src/branch/main/dev/aes

#linux #bash #shell #script #aes #rijndael #encryption

Steadily on my way builing an Rijndael-esque encryptor.
Building upon my #xor shell script; yesterday I made an 256 bits sustitution table.
Today I made the foundation of a key scheduler. Interestingly bash is able to process 4×4, 6×4 or 8×4 matrices. And the code is still quite simple. I am learning a lot and enjoying all the little puzzles to solve!
Follow my progress on #codeberg.
https://codeberg.org/oxo/tool/src/branch/main/dev/aes
#linux #bash #shell #script #aes #rijndael #encryption

Duck.ai is not able to generate a complete substitution matrix from the Rijndael cipher. It starts off promising, but then gets stuck about halfway. I asked it to generate the table from the halfway point and it did. But it made up the values it produced. #stupidai

Cut the #base64 endoding from my #xor shall script. Also adjusted to a non-redundant key length for the last chunk of input into the xor function.
Next hurdle: proper key rotation...
Will upload my progress to the repos asap.
#linix #bash #xor #enccryption

The #base64 command has a wrap option. If it is set to 0 then you basically have created a base64 stream (without any EOL's). Which comes in handy for my #xor project.
Development btw is published when I have internet connection;
https://codeberg.org/oxo/tool/src/branch/main/dev/aes
Enjoy your day!
#linux #commandline #script

I realized that #encryption is not easy. Adjusted my goal from building a full blown Rijndael #cipher to a more simple xor block cipher. For educational purposes only!

Now I am more or less ready with the #base64 encoding of the input (#plaintext and #key), conversion to #ASCII #hex and then creating #binary codes. Then the plaintext has to be split into 16 byte blocks, which are to be #xor-ed with the key.

Todo: key-rotation, to make the algorithm stronger.

Today I learned: all the above. But especially how valuable base64 encoding is for converting non-ASCII characters.

Okay, I now want to write the Rijndael algorithm (AES) in bash.
Is that even possible?
Any suggestions appreciated!
Wish me luck. 😃
#bash #aes #symmetric #encrypton #algorithm

isolatest, the tool to download an up-to-date archiso has been moved to hajime, the archlinux installation tool.

Please update your local repos and have a nice day!

#isolatest #archlinux #hajime #linux #installation
https://codeberg.org/oxo/hajime/src/branch/main/prep

passr is the password-store wrapper I developed and use on a daily basis.

Today I improved the autoentry function with an audible cue, customizable fields and input duration.

Adding ``aeseq: url:5 userid:5 password:5`` to your pass-file will wait 5 seconds until the next field value.
passr also says (with e-speak) which field value is loaded.
Works pretty cool!

#linux #bash #script #pass #passr #password #manager
https://codeberg.org/oxo/tool/src/branch/main/passr

Need some password inspiration?
https://yewtu.be/watch?v=o3nBbvfdwkI

Currently my Linux experience; One rabbit hole covered, looking back, three new rabbit holes arisen...
I somehow have totally broken my DNS. Seems to be lots of layers of which I have no clue about...

After more than 5 years of trustworthy use, I discarded my old hasher 'pwgn' and replaced it with a brand new 'pwg2'.

'Pwg2' is based on the widely implemented and appreciated Argon2 hash function. The script became incredibly more shorter and simpler. Also because of Argon2 the execution time is dramatically reduced. All in all another productive day!

Please test the script if you like and report back any vulnerabilities. Thank you!

#linux #bash #script #argon2 #password #hash #function
https://codeberg.org/oxo/tool/src/branch/main/pwg2

After wiping my main system, which is not so old and has an nvme drive, during instllation hajime came to a standstill while attempting to execute sgdisk. I went to sleep and dreamt my solution should be in line 621?! Now see if it works...
https://codeberg.org/oxo/hajime
#linux #arch #oxo #hajime #bash #commandline #installer

Hajime is finished! I consider it in production from now on.
If you have a spare machine, check it out. A quick offline installation (modules 1-3) will be ready within a couple of minutes.
#linux #archinux #installation #commandline #oxo #hajime
https://codeberg.org/oxo/hajime