spu_hmac_outer_hash(9)

💖 spu_hmac_outer_hash(9) — Kernel API Manual 💖

okay so welcome to the Kernel API Manual page for spu_hmac_outer_hash(9) bestie — yes, the manual name is folded in right here at the top instead of copying that header line like a npc 💅. This one is short, useful, and lowkey iconic. Let's go.

🌸 NAME 🌸

spu_hmac_outer_hash — requests a synchonous software compute of the outer hash for an HMAC request 💖. (That spelling is straight from the page; we're keeping it, no cap.)

✨ SYNOPSIS ✨

Here's the signature, exactly:

int spu_hmac_outer_hash (struct ahash_request *req , struct iproc_ctx_s
*ctx );

🎀 ARGUMENTS 🎀

• req — the HMAC request from the crypto API. It's giving main character request energy 🔥.
• ctx — the session context. The supportive bestie holding the session vibe together 🫶.

🔥 RETURN 🔥

• 0 — if synchronous hash operation successful. Slay, we love a success code ✨.
• -EINVAL — if the hash algo is unrecognized. Not the vibe, but at least it tells you 😭.
• any other value — indicates an error. Yep, that's the whole mood 💀.

🌈 SEE ALSO 🌈

Kernel file ./drivers/crypto/bcm/cipher.c — that's the file to peek at, iykyk 👀. Then these besties:

• select_channel(9)
• spu_skcipher_rx_sg_create(9)
• spu_skcipher_tx_sg_create(9)
• handle_skcipher_req(9)
• handle_skcipher_resp(9)
• spu_ahash_rx_sg_create(9)
• spu_ahash_tx_sg_create(9)
• handle_ahash_req(9)
• ahash_req_done(9)
• handle_ahash_resp(9)
• spu_aead_rx_sg_create(9)
• spu_aead_tx_sg_create(9)
• handle_aead_req(9)
• handle_aead_resp(9)
• spu_chunk_cleanup(9)
• finish_req(9)
• spu_rx_callback(9)
• skcipher_enqueue(9)
• spu_no_incr_hash(9)
• aead_gcm_esp_setkey(9)
• rfc4543_gcm_esp_setkey(9)
• aead_ccm_esp_setkey(9)
• spu_functions_register(9)
• spu_mb_init(9)

xoxo, your Kernel API Manual 💅 — source/version: ./drivers/crypto/bcm · date: October 2026 · page: spu_hmac_outer_hash(9) 🎀