MESSAGE DIGEST ALGORITHM DEFINITIONS(9)

💅 Message Digest Algorithm Definitions 💅

okay bestie, welcome to the Kernel API Manual ✨ this page is short and sweet and it's giving "backstage pass to the hash world" 🎀

🌸 DESCRIPTION 🌸

so like, these data structures are literally the blueprint for modular message digest algorithm implementations 💖 they're the whole vibe — you define your digest algorithm in a nice lil modular way, and the kernel handles all the registration drama for you.

who manages them? these four icons, that's who 👑

• crypto_register_ahash — signs your async hash algo up for the roster 💫
• crypto_register_shash — same energy, but for the synchronous girlies 🦋
• crypto_unregister_ahash — yep, taking the async one back off the roster 🙈
• crypto_unregister_shash — and the synchronous one too, bye bestie 👋

that's the entire description, no cap — the actual struct definitions live over in the headers and the per-API pages, so go click through the list below ⬇️

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✨ SEE ALSO ✨

first up, the actual file you're gonna wanna open, no cap 📂

• ./include/crypto/hash.h — Kernel file, the mothership 🏠

then the two struct pages, the main character energy of this whole page 👑

• struct ahash_alg(9)
• struct shash_alg(9)

🦋 Asynchronous Message Digest API(9) — the async girlies 🦋

• Asynchronous Message Digest API(9) — the whole async family, start here 💫
• 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) — the request squad 🎀

• Asynchronous Hash Request Handle(9) — the request object itself, icon behavior 💅
• 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) — the sync girlies 🌈

• Synchronous Message Digest API(9) — the whole sync family, your next stop 💖
• 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)

fr fr that's every single reference, don't skip any of them, iykyk 🫶

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mwah, that's the whole page bestie 😭💜 it lives at ./include/crypto and it's dated October 2026 — go forth and hash, you're gonna slay ⭐👑