ahash_request_set_crypt(9)

💅 ahash_request_set_crypt(9) — set data buffers ✨

okay so bestie, welcome to this Kernel API Manual page (section 9, we love a kernel moment). This is the one where you set data buffers for an ahash_request. It's short, it's iconic, and it's literally the setup move. no cap.

🌸 NAME 🌸

ahash_request_set_crypt — set data buffers. that's the whole name, periodt.

✨ SYNOPSIS ✨

void ahash_request_set_crypt (struct ahash_request *req , struct
       scatterlist *src , u8 *result , unsigned int nbytes );

🫶 ARGUMENTS 🫶

• req — the ahash_request handle to be updated. main character energy, honestly.
• src — the source scatter/gather list. yes bestie, scatter/gather, we're fancy like that.
• result — the buffer that is filled with the message digest. caller responsibility alert: the caller must ensure that the buffer has sufficient space by, for example, calling crypto_ahash_digestsize. do not skip the buffer-size vibe check, iykyk.
• nbytes — the number of bytes to process from the source scatter/gather list. that's the byte count, not a vibe count.

💖 DESCRIPTION 💖

okay so here's the tea: by using this call, the caller references the source scatter/gather list. that source scatter/gather list points to the data the message digest is to be calculated for.

it's giving “point the request at the actual bytes” energy. that's the description, bestie — short and sweet, no extra lore.

🎀 SEE ALSO 🎀

the whole friend group, fr fr:

• Kernel file ./include/crypto/hash.h
• 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_final(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_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)

okay bye bestie — source/version vibe is ./include/crypto, dated October 2026, and ahash_request_set_crypt(9) is signing off 💅✨