blake2b(9)

💅 blake2b(9) — it's giving Kernel API Manual ✨

okay so bestie, welcome to the glow-up of blake2b(9) — the one-shot BLAKE2b hash moment. It lives under the Kernel API Manual, and honestly? Iconic. Let's get into it 🫶

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🌸 NAME 🌸

blake2b — compute a BLAKE2b hash in one shot. One shot, one vibe, no multi-step drama 💅

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✨ SYNOPSIS ✨

void blake2b (const u8 *key , size_t keylen , const u8 *in , size_t
inlen , u8 *out , size_t outlen );

That's the whole signature, no cap. Six args, one hash, zero excuses 🎀

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💖 ARGUMENTS 💖

• key — the key, or NULL if you're doing an unkeyed hash. Like, no key, no problem ✨
• keylen — the key length in bytes (at most BLAKE2B_KEY_SIZE), or 0 for an unkeyed hash. Zero means "we're going keyless tonight" 💀
• in — the message data. The actual tea being hashed 🍓
• inlen — the data length in bytes. Gotta know how much tea ☕
• out — (output) the resulting BLAKE2b hash, with length outlen. This is where the magic lands, main character energy 👑
• outlen — length of the output hash value in bytes, at most BLAKE2B_HASH_SIZE. Respect the cap bestie, it's literally the max 🌈

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🦋 CONTEXT 🦋

Any context. Literally any. Go off, you're so valid here 💜

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🔥 SEE ALSO 🔥

Kernel file ./include/crypto/blake2b.h and the whole friend group:

• struct blake2b_ctx(9)
• blake2b_init(9)
• blake2b_init_key(9)
• blake2b_update(9)
• blake2b_final(9)

the incremental girls are all linked above, iykyk 🌸

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ngl if you're into the streaming/blended vibe instead of one-shot, blake2b_init family is right there in the SEE ALSO. periodt 💅

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mwah 💖 this slay of a page comes to you from ./include/crypto, dated October 2026 — take care of her, she's iconic 🎀✨