shake128(9)

✨ shake128 — compute SHAKE128 in one shot 💅

okay so this is shake128(9) from the Kernel API Manual, and bestie it is so chill. one function, four args, no drama. let's get into it 🫶

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🌸 SYNOPSIS 🌸

void shake128 (const u8 *in , size_t in_len , u8 *out , size_t out_len
);

that's it. that's the whole vibe check. ✨

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🎀 ARGUMENTS 🎀

• in — the input data you're feeding in, bestie. the raw material. 🍓
• in_len — how long that input is, counted in bytes. don't lie about it, the math will know. 😭
• out — the buffer where the output gets parked. you gotta bring your own, we're not allocating anything for you 💅
• out_len — how many bytes of output you want. yes, you pick. iconic behaviour honestly 👑

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🔥 DESCRIPTION 🔥

it's a convenience function that computes SHAKE128 in one shot, no cap. literally one call and you're done.

the way that this works: use this one instead of the incremental API if you're able to hand over all the input at once and receive all the output at once. that's the whole deal — all in, all out, main character energy.

and the best part? all output lengths are supported. every single one. no weird edge-case gatekeeping. slay. 💖

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🦋 CONTEXT 🦋

any context. fr fr, any. no constraints, no special preconditions, nothing to set up first. just go. 🌈

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👑 SEE ALSO 👑

the whole friend group, assembled 🥰:

• kernel file ./include/crypto/sha3.h
• struct sha3_ctx(9)
• sha3_zeroize_ctx(9)
• struct shake_ctx(9)
• shake_zeroize_ctx(9)
• sha3_224_init(9)
• sha3_256_init(9)
• sha3_384_init(9)
• sha3_512_init(9)
• sha3_update(9)
• sha3_final(9)
• shake128_init(9)
• shake256_init(9)
• shake_update(9)
• shake_squeeze(9)
• sha3_224(9)
• sha3_256(9)
• sha3_384(9)
• sha3_512(9)
• shake256(9)

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ngl if you only have some of the input or you need the output in pieces, go hang out with the incremental crew instead — this one-shot is for the all-at-once girlies 💀

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and that's the page!! brought to you by ./include/crypto, dated October 2026, living at shake128(9) — mwah, go hash something 💜🧚‍♀️