crypto_shash_finup(9)

✨ crypto_shash_finup(9) ✨

Okay bestie, welcome to the Kernel API Manual — we're looking at crypto_shash_finup(9) today and honestly? It's giving "one function to rule them all." 💅

🌸 NAME 🌸

crypto_shash_finup — calculate the message digest of a buffer, the shortcut way 🎀

🦋 SYNOPSIS 🦋

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

💖 ARGUMENTS 💖

• desc — no thoughts, head empty, just go read crypto_shash_final for the deets ✨
• data — bestie, this one's explained over in crypto_shash_update
• len — same situation, crypto_shash_update has you covered
• out — and this one? crypto_shash_final, periodt 💅

🔥 DESCRIPTION 🔥

So here's the vibe: this function is literally a "short-hand" for calling crypto_shash_update and then crypto_shash_final. That's it, that's the whole personality. 🌈

The parameters mean exactly the same thing as they do for those two separate functions — same meanings, same energy, just fewer lines of code on your end. Not me being efficient with my life 😭👑

💀 CONTEXT 💀

Softirq or process context. That's the whole vibe check. 🫶

⭐ RETURN ⭐

• 0 — the message digest creation was successful, slay 🎉
• < 0 — an error happened, sad girl hours 🙈

🧚 SEE ALSO 🧚

• 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_digest(9)
• crypto_shash_tfm_digest(9)
• crypto_shash_export(9)
• crypto_shash_import(9)
• crypto_shash_init(9)
• crypto_shash_update(9)
• crypto_shash_final(9)

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that's the whole page bestie, go forth and hash 💜

This lil masterpiece lives in ./include/crypto and it's stamped October 2026 — page crypto_shash_finup(9), signing off 🎀✨