hmac_sha224_..._usingrawkey(9)

🌸 hmac_sha224_init_usingrawkey(9) — the kernel API manual, bestie edition 🌸

okay so this page is from the Kernel API Manual, section 9, and it's literally about the family of hmac_sha224_..._usingrawkey functions. pull up a chair 💅

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✨ NAME ✨

hmac_sha224_init_usingrawkey — Initialize an HMAC-SHA224 context for a new message, using a raw key

like, it sets up your context so you can start feeding it a message. raw key style. no cap 🎀

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✨ SYNOPSIS ✨

void hmac_sha224_init_usingrawkey (struct hmac_sha224_ctx *ctx , const
u8 *raw_key , size_t raw_key_len );

that's the whole signature, verbatim, don't come for me 🫶

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✨ ARGUMENTS ✨

• ctx — (output) the HMAC context to initialize. it's the thing you're filling up, the main character of this operation 👑
• raw_key — the raw HMAC-SHA224 key. your actual key bytes, straight up 🙈
• raw_key_len — the key length in bytes. and here's the slay: All key lengths are supported. any size, no gatekeeping 💖

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✨ DESCRIPTION ✨

If you don't need incremental computation, consider hmac_sha224_usingrawkey instead.

fr fr — if you're not doing the whole feed-it-piece-by-piece thing, that one-shot version is right there and it's giving convenience ⭐

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✨ CONTEXT ✨

Any context.

literally any. no restrictions, we're chill like that 🦋

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✨ SEE ALSO ✨

the whole squad, all chillin' in the kernel file ./include/crypto/sha2.h:

sha224 era

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

hmac_sha224 era

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

sha256 era

• 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_sha256 era

• 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)

sha384 era

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

hmac_sha384 era

• 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)

sha512 era

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

hmac_sha512 era

• 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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and that's the page, bestie 💜 it ships from ./include/crypto and it's dated October 2026, so go forth and initialize your contexts responsibly ✨🎀