hmac_sha512_usingrawkey(9)

💅 hmac_sha512_usingrawkey(9)

okay bestie, welcome to hmac_sha512_usingrawkey(9) from the Kernel API Manual — we're doing HMAC-SHA512 in one shot, using a raw key, and it's giving exactly what it says on the tin. ✨

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💖 NAME

hmac_sha512_usingrawkey — compute HMAC-SHA512 in one shot, using a raw key. That's the whole function, and it ate. 💅

✨ SYNOPSIS

okay bestie, here's the exact signature — do not freestyle the types:

void hmac_sha512_usingrawkey (const u8 *raw_key , size_t raw_key_len ,
       const u8 *data , size_t data_len , u8 out[static SHA512_DIGEST_SIZE] );

🌸 ARGUMENTS

• raw_key — the raw HMAC-SHA512 key. Literally the raw key, bestie. 🔑
• raw_key_len — the key length in bytes. All key lengths are supported, so no cap. ✨
• data — the message data. 📨
• data_len — the data length in bytes. 📏
• out — (output) the resulting HMAC-SHA512 value. This is where the HMAC-SHA512 result lands. 🎀

🦋 DESCRIPTION

If you're using the key multiple times, prefer to use hmac_sha512_preparekey followed by multiple calls to hmac_sha512 instead. That's the move. Periodt. 💖

🎀 CONTEXT

Any context. That's the whole section, and it's iconic. 💅

🌈 SEE ALSO

Kernel file: ./include/crypto/sha2.h — and the whole crypto family reunion is linked here, bestie:

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

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mwah 💋 — source/version: ./include/crypto; date: October 2026. Stay cryptographic, bestie. 🫶