ASN1DECODING(1)

📦
version 4.21.0 · 5 versions
, in alpine 3.22, alpine 3.23, alpine 3.24, arch rolling, fedora 43, fedora 44, opensuse-leap 16.0, ubuntu resolute, ubuntu stonking

💖 asn1Decoding — the ASN.1 DER decoder, bestie edition 💖

okay so this is a User Command, it lives in section 1 of the manual (iykyk), and it's literally called asn1Decoding. she decodes ASN.1 DER data. that's her whole thing. 🎀

✨ NAME ✨

asn1Decoding — an ASN.1 DER decoder 🦋

✨ SYNOPSIS ✨

asn1Decoding [OPTION] DEFINITIONS ENCODED ASN1TYPE

✨ DESCRIPTION ✨

So here's the vibe: asn1Decoding takes the DER data sitting in the ENCODED file, decodes it for the ASN1TYPE element — which is described over in the ASN.1 DEFINITIONS file — and then prints out the decoded structures for you. no cap, that's the whole job. 💅

🌸 OPTIONS 🌸

  • -b, --benchmark — runs a benchmark on the decoding. basically a vibe check on how fast she's moving 🔥
  • -s, --strict — uses strict DER decoding. she is being strict, no shortcuts, no slacking 👑
  • -t, --no-time-strict — uses strict DER decoding, but not in time fields. strict everywhere except the time fields, she's giving nuance ✨
  • -h, --help — shows you this help and then dips. bye bestie 🫶
  • -v, --version — outputs the version info and exits. the receipts, basically 💖

✨ AUTHOR ✨

Written by Fabio Fiorina. an icon, a legend, and he IS the moment 🎀

✨ REPORTING BUGS ✨

found a bug? don't suffer in silence bestie, tell the people:

Copyright © 2026 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law. fr fr, zero warranty, she said what she said 💀

✨ SEE ALSO ✨

The full documentation for asn1Decoding is maintained as a Texinfo manual. If the info and asn1Decoding programs are properly installed at your site, the command

info libtasn1

should give you access to the complete manual. go read it, it's giving scholarly 📚✨

and that's the whole page!! this was shipped as part of libtasn1 4.21.0, dated January 2026 — so you already know it's fresh, it's current, it ate and left no crumbs 💅🌸💖

📦 where this page comes from