ocs_aes_set_key(9)

💅 ocs_aes_set_key(9) 💅

okay so bestie, welcome to the kernel API manual — this one's ocs_aes_set_key(9) and it's literally the glow-up moment where you hand your key over to the OCS AES hardware. no cap, it's a tiny little function but she's iconic and you're gonna slay it 🎀

---

✨ NAME ✨

ocs_aes_set_key — write a key into the OCS AES hardware. that's it, that's the whole vibe 💖

---

🌸 SYNOPSIS 🌸

int ocs_aes_set_key (struct ocs_aes_dev *aes_dev , u32 key_size , const
u8 *key , enum ocs_cipher cipher );

look at her go 😭 she takes four args and returns an int, periodt.

---

🦋 ARGUMENTS 🦋

• aes_dev — the OCS AES device you're writing the key to. like, which hardware bestie are we talking to 💅
• key_size — how big the key is, measured in bytes. yes, bytes, not bits, don't come for me 🙈
• key — the actual key you're writing. the secret sauce 🔥
• cipher — which cipher this key is for. matters, because the rules differ iykyk 👑

---

🌈 DESCRIPTION 🌈

here's the tea ☕ and it's genuinely important, not just vibes:

• for AES, key_size must be either 16 or 32.
• for SM4, key_size must be 16.

that's the whole constraint, ngl it's giving "short but strict" 💀

---

⭐ RETURN ⭐

0 on success 💖 — or a negative error code otherwise 😭.

like, zero means we ate, anything negative means something went sideways. no in-between, bestie.

---

🌟 SEE ALSO 🌟

• kernel file ./drivers/crypto/intel/keembay/ocs-aes.c
• struct ocs_dma_linked_list(9)
• ocs_aes_op(9)
• ocs_aes_gcm_op(9)
• ocs_aes_ccm_op(9)
• ocs_create_linked_list_from_sg(9)

go read those too, the whole squad is worth your time 🫶

---

okay that's the page!! sourced straight from ./drivers/crypto/intel/keembay, dated October 2026, and indexed under ocs_aes_set_key(9) — mwah, go set some keys bestie 💜🧚‍♀️