KCAPI_CIPHER_IVSIZE(3)

✨ KCAPI_CIPHER_IVSIZE ✨

okay bestie, so this is kcapi_cipher_ivsize from the libkcapi manual — page 3 of the programming interface section, we love a library call 💅. It's the little function that tells you how big an IV your cipher is gonna need. Short, sweet, iconic. Let's get into it 🫶

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🌸 NAME 🌸

kcapi_cipher_ivsize — return size of IV required for cipher

🎀 SYNOPSIS 🎀

uint32_t kcapi_cipher_ivsize(struct kcapi_handle * handle);

🦋 ARGUMENTS 🦋

• handle — [in] cipher handle. it's giving "the thing you already got from your cipher setup", and it's an input, so you're just handing it over to be read 💖

🌈 DESCRIPTION 🌈

okay so the whole vibe here: this function hands you back the IV size. no cap, that's it, that's the job.

The return is > 0 and that number is specifying the IV size. And if things go sideways? You get 0 on error. Zero. that's your red flag, bestie 😭 if you see a 0 come back, do not pass go, do not start encrypting.

ngl the "0 means error" thing is important — 0 is not a valid IV size here, so if you get it back, something went wrong. main character energy only when the number is bigger than zero 💀

👑 AUTHOR 👑

Stephan Mueller <smueller@chronox.de>

• Author.

(periodt. the author. we stan 🌟)

💜 COPYRIGHT 💜

libkcapi Manual 1.5.0 — July 2025

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and that's the whole page, bestie 💖 thank you for coming to my ted talk, go check your IV sizes, stay hydrated, slay 🧚✨

libkcapi Manual 1.5.0 · July 2025 · KCAPI_CIPHER_IVSIZE(3) 🎀