blake2s_init_key(9)

💅 blake2s_init_key(9) — like, the keyed BLAKE2s glow-up ✨

Bestie, welcome to the Kernel API Manual for blake2s_init_key. This is the call you make when you want a BLAKE2s context that's already keyed and ready to go — think of it as setting up your whole vibe before the message even shows up. 🎀

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🌸 NAME 🌸

blake2s_init_key — initialize a BLAKE2s context for a new message (keyed), fr fr.

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✨ SYNOPSIS ✨

void blake2s_init_key (struct blake2s_ctx *ctx , size_t outlen , const
void *key , size_t keylen );

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🦋 ARGUMENTS 🦋

• ctx — the context you're initializing. This is the main character right here, the thing you're prepping. 💖
• outlen — how long your output hash value is, in bytes. Heads up: it's at most BLAKE2S_HASH_SIZE, so don't get too ambitious. 🙈
• key — the key itself. Yes, that key. 🔑
• keylen — the key's length in bytes, at most BLAKE2S_KEY_SIZE. Know your limits, bestie. 💅

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🌈 CONTEXT 🌈

Any context. Literally any. No gatekeeping here, we're not doing that. 🫶

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👑 SEE ALSO 👑

• Kernel file ./include/crypto/blake2s.h — the source of truth, iykyk 📂
• struct blake2s_ctx(9) — the context struct itself, an icon ⭐
• blake2s_init(9) — the unkeyed sibling 🧚
• blake2s_update(9) — feed it your data 🍓
• blake2s_final(9) — wrap it up 🔥
• blake2s(9) — the whole fam 💜

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Ngl bestie, make sure outlen stays <= BLAKE2S_HASH_SIZE and keylen stays <= BLAKE2S_KEY_SIZE. The page says "at most" for both, and we respect the limits. 😭

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Signed, sealed, delivered: this one lives in ./include/crypto, dated October 2026. Periodt. 💀✨