hmac_sha224_init(9)

💖 NAME 💖

okay so bestie, welcome to the hmac_sha224_init page from the Kernel API Manual — yes that's hmac_sha224_init(9), section 9, kernel-space, very demure, very mindful. ✨

hmac_sha224_init — initializes an HMAC-SHA224 context for a shiny new message 🎀

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🦋 SYNOPSIS 🦋

void hmac_sha224_init (struct hmac_sha224_ctx *ctx , const struct
       hmac_sha224_key *key );

like, that's the whole vibe. void in, void out, no return value to worry about 💅

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🌸 ARGUMENTS 🌸

• ctx — (output) the HMAC context you're initializing. this is the main character, she gets filled in 🫶
• key — the prepared HMAC key. note the prepared part, she's already been through her prep routine, do not hand her a raw key 🔥

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👑 DESCRIPTION 👑

so real talk: if you don't need incremental computation, consider hmac_sha224 instead. like, no cap, if you're doing it all in one go, don't make it complicated.

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✨ CONTEXT ✨

Any context. any. literally any. she does not discriminate 💀

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🌈 SEE ALSO 🌈

grab a snack, this list is long and honestly iconic 🍓 First up, the kernel file we're living in:

• Kernel file ./include/crypto/sha2.h

💜 the sha224 fam

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

💜 the hmac_sha224 fam (our girls)

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

💜 the sha256 fam

• 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 fam

• 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 sha384 fam

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

💜 the hmac_sha384 fam

• 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 sha512 fam

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

💜 the hmac_sha512 fam, last but never least

• 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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ngl bestie, that's the whole page. go init your context, you're gonna slay 💅✨

mwah 💋 — this little gem lives in ./include/crypto and it's dated October 2026. that's the source, the version and the date all in one, periodt. 🎀