crypto_shash_digest(9)

💅 crypto_shash_digest(9) — like, the Kernel API Manual entry, but make it make sense

okay so before we even start: this is crypto_shash_digest, and it lives in the Kernel API Manual. yes, that Kernel API Manual. we're doing kernel crypto today bestie, put your hair up 🎀

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✨ NAME ✨

crypto_shash_digest — calculate the message digest for a buffer

like, you hand it a buffer, it hands you back a digest. that's the whole vibe. no cap. 🦋

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🌸 SYNOPSIS 🌸

int crypto_shash_digest (struct shash_desc *desc , const u8 *data ,
unsigned int len , u8 *out );

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🧚 ARGUMENTS 🧚

• desc — bestie, this one's a "see crypto_shash_final" situation. the docs are literally pointing you there, so go look 👀
• data — and this one says see crypto_shash_update. yes, same energy.
• len — also see crypto_shash_update. it's giving "refer to the group chat for context" honestly 🙈
• out — and we're back to see crypto_shash_final. full circle, iconic.

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💖 DESCRIPTION 💖

so this function is a "short-hand" for calling crypto_shash_init, crypto_shash_update, and crypto_shash_final. that's it. that's the tea. it literally just bundles all three so you don't have to write them out yourself — main character energy for the lazy girlies 🫶

and the parameters? they mean exactly the same thing as they do for those three separate functions. same meaning, no plot twist, no surprises. slay. ✨

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🔥 CONTEXT 🔥

softirq or process context. those are the only two vibes allowed here 💅

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⭐ RETURN ⭐

• 0 if the message digest creation was successful 🎉
• < 0 if an error occurred 😭

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👑 SEE ALSO 👑

okay this is the long part, stay with me, we're getting through the whole list because nobody gets left behind:

• 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_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_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)

like I said. the whole list. we ate that 💀🔥

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ngl this page is short but she's efficient. a true icon. go read crypto_shash_init, crypto_shash_update, and crypto_shash_final if you want the full lore — iykyk 🧚‍♀️

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okay that's it, that's the manual page, you're literally a shash expert now, so proud of you 💜 anyway, this little number comes from ./include/crypto and it's dated October 2026 — mwah, catch you in the next manpage bestie 😭🎀💖