sha224(9)

🌸 NAME 🌸

okay so this is sha224(9) from the Kernel API Manual — the one-shot version of SHA-224. It computes a SHA-224 message digest in one shot, meaning you hand it the whole message and it hands you back the digest. no streaming, no drama, no init/update/final situationship. 💅

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✨ SYNOPSIS ✨

void sha224 (const u8 *data , size_t len , u8 out[static
SHA224_DIGEST_SIZE] );

that's it, that's the whole signature. she's a void, she returns nothing, she just does it. iconic. 🎀

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🎀 ARGUMENTS 🎀

• data — the message data itself. the actual bytes bestie, give her the tea 🫖
• len — how long that data is, counted in bytes. don't lie about this one fr fr 😭
• out — (output) the resulting SHA-224 message digest gets written in here. it's an output param, so she fills it for you — sized SHA224_DIGEST_SIZE, no cap. 💖

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🦋 CONTEXT 🦋

Any context. literally any. no locks, no special context requirements, nothing to worry about. she's chill like that. ✨

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💜 SEE ALSO 💜

the rabbit hole goes deep, so buckle up — the kernel file in question is ./include/crypto/sha2.h, and here's the whole fam, SHA-224 through SHA-512, hashing and HMAC-ing and ctx-ing all the way down 👑

• struct sha224_ctx(9)
• sha224_init(9)
• sha224_update(9)
• sha224_final(9)
• 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)
• 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)
• 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)
• struct sha384_ctx(9)
• sha384_init(9)
• sha384_update(9)
• sha384_final(9)
• sha384(9)
• 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)
• struct sha512_ctx(9)
• sha512_init(9)
• sha512_update(9)
• sha512_final(9)
• sha512(9)
• 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)

like yes that's a lot of cross-references but she's thorough and we respect that 🙈💅

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and that's the whole page bestie 🫶 straight from ./include/crypto, dated October 2026, version sha224(9) — go hash something and slay ⭐🌸