ghash_preparekey(9)

💅 ghash_preparekey(9) ✨

okay so real talk, this is a page straight out of the Kernel API Manual and it's literally about prepping a GHASH key 🎀 no cap, it's a tiny one but it's iconic in its own lowkey way, so let's get into it bestie 🫶

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🌸 NAME 🌸

ghash_preparekey — Prepare a GHASH key 💖

like, that's the whole vibe. it prepares the key. it's giving preparation. periodt.

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✨ SYNOPSIS ✨

void ghash_preparekey (struct ghash_key *key , const u8
raw_key[GHASH_BLOCK_SIZE] );

that's it, that's the signature 🫶 copy it exactly, don't be out here renaming things, i'm watching 👀

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🎀 ARGUMENTS 🎀

• key — (output) the key structure you're gonna initialize 💅 it's the output bestie, so it comes back all filled in for you
• raw_key — the raw hash key 🌸 the actual key material, handed to you as-is

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🦋 DESCRIPTION 🦋

Initialize a GHASH key structure from a raw key ✨

that's the whole thing. you hand it a raw key, it hands you back a nice initialized struct ghash_key. the way that it just works 😭👑

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🌈 CONTEXT 🌈

Any context 👑 ngl, that's the most chill context line i've ever seen. no locks, no special rules, no "you must be in interrupt context or the kernel will personally come for you" — just any context 💚 slay.

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⭐ SEE ALSO ⭐

Kernel file ./include/crypto/gf128hash.h — go read it, it's where the family lives 🧚

• struct polyval_elem(9)
• struct ghash_key(9)
• struct polyval_key(9)
• struct ghash_ctx(9)
• struct polyval_ctx(9)
• polyval_preparekey(9)
• ghash_init(9)
• polyval_init(9)
• polyval_import_blkaligned(9)
• polyval_export_blkaligned(9)
• ghash_update(9)
• polyval_update(9)
• ghash_final(9)
• polyval_final(9)
• ghash(9)
• polyval(9)

that's the whole squad fr fr 💜

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and that's a wrap bestie!! 🎉 this lil page lives over in ./include/crypto and it's stamped October 2026 — so yeah, mark your calendar, it's canon 🗓️💖