sha3_384(9)

💅 sha3_384(9) — Kernel API Manual, bestie edition

okay so this is a page from the Kernel API Manual and it's about sha3_384, which is literally the "do it all in one go" way to get a SHA3-384 digest 🎀 no incantations, no state to babysit, just vibes and bytes.

---

✨ NAME ✨

sha3_384 — Compute SHA3-384 digest in one shot 💫

---

🌸 SYNOPSIS 🌸

void sha3_384 (const u8 *in , size_t in_len , u8
out[SHA3_384_DIGEST_SIZE] );

---

🦋 ARGUMENTS 🦋

• in — The input data to be digested 🍓 like, the actual snack, the data itself
• in_len — Length of the input data in bytes 📏 yes bestie, in bytes
• out — The buffer into which the digest will be stored 🫙 it's gonna hold SHA3_384_DIGEST_SIZE worth of digest, that's the whole point

---

💖 DESCRIPTION 💖

A convenience function that computes a SHA3-384 digest ✨ That's it, that's the whole thing.

Use this instead of the incremental API if you're able to provide all the input at once 👑 like, if you've already got the entire blob sitting there in in? then why would you do the incremental dance, this is the shortcut, take it 💅

---

🌈 CONTEXT 🌈

Any context 🔥 literally any. no restrictions, no special preconditions, go off.

---

👑 SEE ALSO 👑

Bestie, the whole crypto sha3/shake friend group is here — go say hi:

• 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_512(9)
• shake128(9)
• shake256(9)

ngl the incremental API is great and all, but if you've got every byte up front there is genuinely zero reason to suffer through init/update/final 😭 this one-shot function ate 💀

---

okay that's the page!! mwah 💜 this came from ./include/crypto, dated October 2026 — and yes the manual itself is sha3_384(9) up top, love that for us 🌸🫶 periodt ✨