crypto_ahash_final(9)

💅 crypto_ahash_final(9) — Kernel API Manual ✨

Hey bestie, welcome to the Kernel API Manual 🫶 this one's the page for crypto_ahash_final(9), and no cap it's a little cutie. It's the "okay we're done, give me the digest" moment of the async hash world. Let's get into it.

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✨ NAME ✨

crypto_ahash_final — calculate message digest 🎀

🌸 SYNOPSIS 🌸

int crypto_ahash_final (struct ahash_request *req );

🦋 ARGUMENTS 🦋

• req — your reference to the ahash_request handle 💜 and that handle is literally holding all the information needed to perform the cipher operation. main character energy fr.

💖 DESCRIPTION 💖

So here's the vibe check: this function finalizes the message digest operation, and it creates the message digest based on literally all the data that got added to the cipher handle 🌈.

Where does the digest go? It gets placed into the output buffer that's registered with the ahash_request handle. That's it, that's the whole glow-up. 💅

🔥 RETURN 🔥

• 0 — slay 💅 the message digest was successfully calculated
• -EINPROGRESS — the data got fed into hardware (DMA) or it's queued for later, so like… it's working on it, chill 🙈
• -EBUSY — the queue is full 😭 and the request should be resubmitted later
• other < 0 — bestie something went wrong, an error occurred 💀

👑 SEE ALSO 👑

okay this list is long long, but every single one of these is iconic in its own right, so:

• Kernel file ./include/crypto/hash.h and Message Digest Algorithm Definitions(9)
• struct ahash_alg(9)
• struct shash_alg(9)
• Asynchronous Message Digest API(9)
• crypto_alloc_ahash(9)
• crypto_free_ahash(9)
• crypto_has_ahash(9)
• crypto_ahash_blocksize(9)
• crypto_ahash_digestsize(9)
• crypto_ahash_statesize(9)
• crypto_ahash_reqtfm(9)
• crypto_ahash_reqsize(9)
• crypto_ahash_setkey(9)
• crypto_ahash_finup(9)
• crypto_ahash_digest(9)
• crypto_ahash_export(9)
• crypto_ahash_import(9)
• crypto_ahash_init(9)
• crypto_ahash_update(9)
• Asynchronous Hash Request Handle(9)
• ahash_request_set_tfm(9)
• ahash_request_alloc(9)
• ahash_request_free(9)
• ahash_request_set_callback(9)
• ahash_request_set_crypt(9)
• ahash_request_set_virt(9)
• Synchronous Message Digest API(9)
• crypto_alloc_shash(9)
• crypto_free_shash(9)
• crypto_shash_blocksize(9)
• crypto_shash_digestsize(9)
• crypto_shash_descsize(9)
• crypto_shash_setkey(9)
• crypto_shash_digest(9)
• crypto_shash_tfm_digest(9)
• crypto_shash_export(9)
• crypto_shash_import(9)
• crypto_shash_init(9)
• crypto_shash_finup(9)
• crypto_shash_update(9)
• crypto_shash_final(9)

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and that's the whole page, bestie ✨ mwah 💋 this little love letter lives in ./include/crypto, dated October 2026, and it's version-era crypto_ahash_final(9) — iykyk 🧚💜