STRUCT HMAC_SHA256_CTX(9)

💖 struct hmac_sha256_ctx(9) 💖

Ok so bestie, welcome to the Kernel API Manual — yes, the kernel has a manual, and yes, it's giving iconic reference-doc energy. Today's main character is struct hmac_sha256_ctx, and honestly? It's a vibe. Let's get into it 🫶

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✨ NAME ✨

struct hmac_sha256_ctx — the context you hold onto while computing an HMAC-SHA256 of a message. That's it, that's the whole job, and it does it slayfully 💅

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🦋 SYNOPSIS 🦋

struct hmac_sha256_ctx {
    struct __hmac_sha256_ctx ctx;
 };

Like, look at her. Minimalist. Clean. No notes 🔥

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🎀 Members 🎀

• ctx — private 🙈 that's literally all the docs say about it, so we're not gonna make stuff up. It's private. Respect her privacy periodt.

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👑 SEE ALSO 👑

Bestie, buckle in, because this list is LONG and every single one of these is invited to the group chat. Also heads up: the kernel file ./include/crypto/sha2.h is where the family lives 🧚

🌸 SHA-224 crew

• struct sha224_ctx(9), sha224_init(9), sha224_update(9), sha224_final(9), sha224(9)

🌸 HMAC-SHA-224 crew

• struct hmac_sha224_key(9), struct hmac_sha224_ctx(9), hmac_sha224_preparekey(9), hmac_sha224_init(9), hmac_sha224_init_usingrawkey(9), hmac_sha224_update(9), hmac_sha224_final(9), hmac_sha224(9), hmac_sha224_usingrawkey(9)

🦋 SHA-256 crew (our girl's home base)

• struct sha256_ctx(9), sha256_init(9), sha256_update(9), sha256_final(9), sha256(9), sha256_finup_2x(9), sha256_finup_2x_is_optimized(9)

🦋 HMAC-SHA-256 crew

• struct hmac_sha256_key(9), hmac_sha256_preparekey(9), hmac_sha256_init(9), hmac_sha256_init_usingrawkey(9), hmac_sha256_update(9), hmac_sha256_final(9), hmac_sha256(9), hmac_sha256_usingrawkey(9)

💜 SHA-384 crew

• struct sha384_ctx(9), sha384_init(9), sha384_update(9), sha384_final(9), sha384(9)

💜 HMAC-SHA-384 crew

• struct hmac_sha384_key(9), struct hmac_sha384_ctx(9), hmac_sha384_preparekey(9), hmac_sha384_init(9), hmac_sha384_init_usingrawkey(9), hmac_sha384_update(9), hmac_sha384_final(9), hmac_sha384(9), hmac_sha384_usingrawkey(9)

⭐ SHA-512 crew

• struct sha512_ctx(9), sha512_init(9), sha512_update(9), sha512_final(9), sha512(9)

⭐ HMAC-SHA-512 crew

• struct hmac_sha512_key(9), struct hmac_sha512_ctx(9), hmac_sha512_preparekey(9), hmac_sha512_init(9), hmac_sha512_init_usingrawkey(9), hmac_sha512_update(9), hmac_sha512_final(9), hmac_sha512(9), hmac_sha512_usingrawkey(9)

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Fr fr, that's the whole page. No hidden options, no exit statuses, no environment variables — just a struct, one private member, and a truly enormous friend group. Lowkey iconic of her 💀💖

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✨ mwah ✨ this lil page came from the source dir ./include/crypto, dated October 2026 — catch you in the next manpage, bestie, ily 🎀🦋💜