gnutls_x509_dn_get_rdn_ava(3)

✨ gnutls_x509_dn_get_rdn_ava(3) ✨

okay bestie, welcome to the gnutls manual, and today's episode is all about gnutls_x509_dn_get_rdn_ava — the little function that lets you peek inside a distinguished name without copying a single byte. lowkey iconic behavior. 🎀

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🌸 NAME 🌸

gnutls_x509_dn_get_rdn_ava — an API function, bestie. that's it, that's the name, slay.

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🦋 SYNOPSIS 🦋

#include <gnutls/x509.h>

int gnutls_x509_dn_get_rdn_ava(gnutls_x509_dn_t dn, int irdn, int iava,
gnutls_x509_ava_st * ava);

yes she's a four-argument girlie. we love a function with range. 💅

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💖 ARGUMENTS 💖

• gnutls_x509_dn_t dn — a pointer to the DN. she's the main character here, the whole distinguished name, the moment. 👑
• int irdn — index of the RDN. think of it as which relative distinguished name you're pulling up. zero-indexed energy, you know how it is.
• int iava — index of the AVA. the lil attribute-value pair living inside that RDN. yes, it's nesting, yes it's giving matryoshka doll, we move. 🪆
• gnutls_x509_ava_st * ava — Pointer to a structure that's gonna hold the output information. she's empty when you hand her over and full of ✨data✨ when you get her back.

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🌈 DESCRIPTION 🌈

okay so the whole point: this function gets you pointers to data within the DN. no copies, no mallocs, no drama — just pointers straight into the thing you already have.

the format of the ava structure is shown below, and no I will not be paraphrasing it, it's literally this:

struct gnutls_x509_ava_st { gnutls_datum_t oid; gnutls_datum_t value;
unsigned long value_tag; };

so you've got an oid, a value, and a value_tag. cute. efficient. we stan a three-field struct. 🍓

now, the X.509 distinguished name? she's a sequence of sequences of strings. that's literally the whole structural vibe. and that nested-sequence situation is exactly what the irdn and iava indexes are modeling — outer index picks the sequence, inner index picks the string, iykyk. 🧚

⚠️ real talk, bestie: ava will contain pointers into the dn structure, which in turn points to the original certificate. so do NOT modify any of that data and do NOT deallocate any of it. you're a guest in that memory, act like it. no touching, no freeing, no funny business. 🙈

also this is a low-level function, meaning she does not hold your hand. the caller has to do the value conversions when necessary (e.g. from UCS-2). she hands you the raw goods and trusts you to know what to do with them. main character energy, honestly. 💅

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⭐ RETURNS ⭐

Returns 0 on success, or an error code. that's the whole story. zero means we ate, anything else means we're debugging. 😭

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🎀 REPORTING BUGS 🎀

found a bug? not the vibe, but okay, report it:

Report bugs to <bugs@gnutls.org>.

Home page: https://www.gnutls.org

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👑 COPYRIGHT 👑

Copyright © 2001-2023 Free Software Foundation, Inc., and others.

Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

(translation: share it, remix it, just keep the receipts. periodt. 💜)

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🔥 SEE ALSO 🔥

The full documentation for gnutls is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form, visit:

https://www.gnutls.org/manual/

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okay that's the whole page, bestie, you're fully caught up. go forth and index your RDNs responsibly. 🫶

gnutls version 3.8.13, page for gnutls_x509_dn_get_rdn_ava(3) — written with love, shipped with pointers, no cap. 💖✨🌈