blake2b_init_key(9)

💫 blake2b_init_key — bestie's guide to the keyed BLAKE2b glow-up 💫

ok so this is a page from the Kernel API Manual, and it's literally about blake2b_init_key(9) — the function that sets up your BLAKE2b context for a brand-new keyed message. keyed!! 🔑

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✨ NAME ✨

blake2b_init_key — initialize a BLAKE2b context for a new message (keyed) 🎀

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🌸 SYNOPSIS 🌸

void blake2b_init_key (struct blake2b_ctx *ctx , size_t outlen , const
void *key , size_t keylen );

that's the whole vibe. four args, no cap. 💅

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🦋 ARGUMENTS 🦋

• ctx — the context you're initializing. it's giving "blank canvas, main character energy" ✨
• outlen — how long your output hash value is, in bytes. and bestie, listen: it's at most BLAKE2B_HASH_SIZE. don't push it past that 🙈
• key — the key. that's it, that's the arg 🔑
• keylen — the key length in bytes, at most BLAKE2B_KEY_SIZE. same rule, same energy 💀

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🌈 CONTEXT 🌈

Any context. literally any. we don't gatekeep here 🫶

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👑 SEE ALSO 👑

go check out the kernel file ./include/crypto/blake2b.h, plus these iconic siblings:

• struct blake2b_ctx(9)
• blake2b_init(9)
• blake2b_update(9)
• blake2b_final(9)
• blake2b(9)

the whole blake2b friend group, fr fr 💖

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ok that's the page!! mwah 💋 this came straight out of ./include/crypto, dated October 2026 — slay, stan, and go initialize some keyed contexts responsibly 🌸✨🎀