STRUCT HMAC_SHA224_KEY(9)

✨ struct hmac_sha224_key(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 this one's a tiny little struct page but it's carrying the whole HMAC-SHA224 glow-up, so let's get into it 🫶

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🎀 NAME 🎀

struct hmac_sha224_key — a prepared key for HMAC-SHA224 🔑✨ like, the key has already done its prep work and is ready to serve looks.

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🌸 SYNOPSIS 🌸

struct hmac_sha224_key {
    struct __hmac_sha256_key key;
 };

no cap, that's the whole thing. she's small, she's iconic, she contains multitudes (one member) 💖

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🦋 Members 🦋

• key — private 🙈 that's literally all the docs say about it, so we're respecting her privacy, periodt.

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🌈 SEE ALSO 🌈

these all live in the kernel file ./include/crypto/sha2.h — go read the whole family, iykyk 📚✨

the SHA-224 girlies 💜

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

the HMAC-SHA224 squad (aka her direct besties) 👑

• 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)

the SHA-256 crew 💙

• 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)

the HMAC-SHA256 crew 🩵

• struct hmac_sha256_key(9), struct hmac_sha256_ctx(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)

the SHA-384 crew 💚

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

the HMAC-SHA384 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)

the SHA-512 crew 🧚

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

the HMAC-SHA512 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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that's the whole page bestie — no bugs, no warnings, no exit statuses, just a struct and a truly massive friend group 😭💀

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and that's a wrap! 🎬 this gem is from ./include/crypto and it's dated October 2026, so mark your calendar and stan responsibly 🌸💖🎀