crypto_shash_update(9)

💖 crypto_shash_update(9) — the Kernel API Manual glow-up 💖

okay so bestie, we're in the Kernel API Manual (crypto_shash_update(9)) and this is literally the function that keeps your message digest fed and happy 🍓

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✨ NAME ✨

crypto_shash_update — add data to message digest for processing 💅

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🌸 SYNOPSIS 🌸

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

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🎀 ARGUMENTS 🎀

• desc — the operational state handle that is already initialized (yes, already — don't come at me with a fresh uninitialized one 🙈)
• data — the input data you're adding to the message digest
• len — length of the input data

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🦋 DESCRIPTION 🦋

It updates the message digest state of the operational state handle. That's the whole vibe — you hand it data, it folds that data into the digest state, and everybody moves on. ✨

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👑 CONTEXT 👑

Softirq or process context. Both are valid, no cap 🫶

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⭐ RETURN ⭐

0 if the message digest update was successful; < 0 if an error occurred 😭

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💀 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_finup(9)
• crypto_shash_final(9)

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mwah 💋 that's the whole page. This one came from ./include/crypto, dated October 2026, and it's filed under crypto_shash_update(9) — periodt, go update some digests bestie 🌈👑