s5p_hash_final(9)

📦 version 7.3.1, in nixpkgs unstable

💖 s5p_hash_final(9) — Kernel API Manual 💖

okay so bestie, welcome to the Kernel API Manual entry for s5p_hash_final(9) — this is the close-up-hash-and-calculate-digest moment, and it's lowkey iconic. 🦋

🌸 NAME 🌸

s5p_hash_final — close up hash and calculate digest. ✨

⭐ SYNOPSIS ⭐

int s5p_hash_final (struct ahash_request *req );

🎀 ARGUMENTS 🎀

  • req — AHASH request. That's the one and only argument, bestie. 💅

🔥 NOTE 🔥

okay so in final, req->src do not have any data, and req->nbytes can be non-zero. 🫶

If there were no input data processed yet and the buffered hash data is less than BUFLEN (64), then calculate the final hash immediately by using SW algorithm fallback. ✨

Otherwise enqueues the current AHASH request with OP_FINAL operation op and finalize hash message in HW. Note that if digcnt!=0 then there were previous update op, so there are always some buffered bytes in ctx->buffer, which means that ctx->bufcnt!=0. 💀

👑 RETURN 👑

  • 0 — if the request has been processed immediately. 🎉
  • -EINPROGRESS — if the operation has been queued for later execution or is set to processing by HW. ⏳
  • -EBUSY — if queue is full and request should be resubmitted later. 😭
  • other negative values — denotes an error. 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/crypto/s5p-sss.c plus the whole crew:

shoutout to the footer: source/version ./drivers/crypto, date October 2026 — iconic, periodt. 💅

📦 where this page comes from