crypto_ahash_export(9)

💅 crypto_ahash_export(9) 💅

okay so this page is from the Kernel API Manual, bestie, and the main character is crypto_ahash_export 💖

✨ NAME ✨

crypto_ahash_export — extract current message digest state. that's the whole vibe. periodt. 💅

🦋 SYNOPSIS 🦋

int crypto_ahash_export (struct ahash_request *req , void *out );

🎀 ARGUMENTS 🎀

• req — a reference to the ahash_request handle whose state is exported 🫶
• out — output buffer of sufficient size that can hold the hash state ✨

🌸 DESCRIPTION 🌸

This function exports the hash state of the ahash_request handle into the caller-allocated output buffer out, which must have sufficient size (e.g. by calling crypto_ahash_statesize). like, no cap, out needs to actually be big enough — the manual literally says sufficient size, and the example sizing move is crypto_ahash_statesize 🧚

🔥 RETURN 🔥

• 0 if the export was successful 😌
• < 0 if an error occurred 😭

🌈 SEE ALSO 🌈

the whole linked squad, 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_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)

cute little sign-off: this page lives under ./include/crypto, dated October 2026, and it's serving crypto_ahash_export(9) energy 💖✨🎀