Re: AES-256-GCM

Stefan Claas wrote:

Stefan Claas wrote:

Stefan Claas wrote:

Stefan Claas wrote:
 

Mmmmhhh, maybe my OpenSSL version is too old or I do something wrong. :-(
 
$ openssl enc -aes-256-gcm -d -in message.txt -out decrypted.txt  -K d33572d668cb7b8f5323bf160309c98d85a9668e26f6df9c667a50982de40123
enc: AEAD ciphers not supported
enc: Use -help for summary.
 
$ openssl version
OpenSSL 3.0.15 3 Sep 2024 (Library: OpenSSL 3.0.15 3 Sep 2024)

 
LibreSSL can't handle it either. I guess no problem because who
uses them, when there are easier tools, like mine, available. ;-)

 
Ok. C version done, which uses OpenSSL library ... :-)

 
Works quite good with larger data. :-)
 
$ time openssl rand 100000000 > bin
 
real    0m4.266s
user    0m0.139s
sys     0m0.140s
$ time aes key < bin > bin2
 
real    0m2.998s
user    0m0.388s
sys     0m0.537s
$ time aes -d key < bin2 > bin3
 
real    0m2.579s
user    0m0.436s
sys     0m0.252s
$ time diff bin bin3
 
real    0m5.868s
user    0m0.055s
sys     0m0.212s

Wanted to know how yas (Yet Another SCOS) performs and it ain't so bad.

$ time openssl rand 100000000 > bin

real    0m4.721s
user    0m0.153s
sys     0m0.152s
$ time yas e 47 11 < bin > bin2

real    0m14.093s
user    0m3.136s
sys     0m0.400s
$ time yas d 47 11 < bin2 > bin3

real    0m15.880s
user    0m5.839s
sys     0m0.280s
$ time diff bin bin3

real    0m8.521s
user    0m0.010s
sys     0m0.377s

Regards
Stefan

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