crypto_ahash_setkey(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 NAME 🎀

okay so welcome to the Kernel API Manual, bestie 💖 — this page is all about crypto_ahash_setkey — and what it does is set key for cipher handle, periodt.

✨ SYNOPSIS ✨

int crypto_ahash_setkey (struct crypto_ahash *tfm , const u8 *key ,
unsigned int keylen );

🌸 ARGUMENTS 🌸

  • tfm — the cipher handle 🫶 like, the thing you're handing the key to.
  • key — a buffer holding the key 🔑 that's literally where the key lives.
  • keylen — length of the key in bytes 📏 no cap, bytes.

🦋 DESCRIPTION 🦋

so the caller-provided key gets set for the ahash cipher 💅 that's the whole vibe.

and here's the important part, iykyk: the cipher handle must point to a keyed hash in order for this function to succeed 😭 like, if it's not a keyed hash, bestie, it's not happening.

👑 RETURN 👑

  • 0 — if the setting of the key was successful ✨ slay.
  • < 0 — if an error occurred 💀 not slay.

🌈 SEE ALSO 🌈

the whole friend group, fr fr:

that's the whole page, bestie 🧚 source vibe: ./include/crypto, dated October 2026 — mwah, go set some keys 💅💜

📦 where this page comes from