pskc_set_key_a...esp_checkdigits(3)

📦
version 2.6.15 · 5 versions
, in arch rolling

💅 pskc_set_key_a...esp_checkdigits(3) — the libpskc manual, but make it make sense 🎀

okay so real talk, this is a page straight out of the libpskc manual, and it's about ONE tiny little setter function. but bestie, tiny functions are still iconic, so let's get into it ✨

🌸 NAME 🌸

pskc_set_key_algparm_resp_checkdigits — it's an API function, and yeah, that name is a whole mouthful, iykyk 😭

✨ SYNOPSIS ✨

#include <pskc.h>

void pskc_set_key_algparm_resp_checkdigits(pskc_key_t * key, int
checkdigit);

that's it, that's the whole vibe. void return, so it gives you nothing back except the satisfaction of a job done 🫶

🦋 ARGUMENTS 🦋

  • pskc_key_t * key — a pskc_key_t handle, and you get it from pskc_get_keypackage(). that's your main character right there 👑
  • int checkdigit — non-zero means you're setting CheckDigit to true, and 0 means, well, not true. simple as that, no cap 💅

💖 DESCRIPTION 💖

so what does this actually DO. it sets the PSKC KeyPackage Key AlgorithmParameters ResponseFormat CheckDigits value 🌟

and this attribute is basically the "do we append a Luhn check digit?" switch. it says whether the device needs to append a Luhn check digit — as defined in [ISOIEC7812] — to the response. highkey important detail: this is only valid if the 'Encoding' attribute is set to 'DECIMAL' 🚨 like, that's the vibe check it has to pass first.

then it's honestly just a yes/no situation:

  • if the value is TRUE, the device WILL append a Luhn check digit to the response ✅
  • if the value is FALSE, the device will NOT append a Luhn check digit to the response ❌

literally that's the whole thing. Luhn on, Luhn off. slay 🔥

⭐ SINCE ⭐

2.2.0 — so it's been around a minute, it's basically vintage at this point 🎀

🐛 REPORTING BUGS 🐛

found a bug?? don't suffer in silence bestie, report it to <oath-toolkit-help@nongnu.org> 💌

Copyright © 2009-2026 Simon Josefsson.

and the licensing is genuinely chill, no drama: 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 🙌 so go forth and share the knowledge, just keep the receipt 💜

and that's the page!! 🌈 this little doc came to you courtesy of libpskc, version 2.6.15 — love her, read her, use her responsibly 💖🎀🌸

📦 where this page comes from