sha512(9)

💖 NAME 💖

okay so bestie, this is sha512(9) from the Kernel API Manual, and it's literally the one-shot SHA-512 girlie:

sha512 — compute a SHA-512 message digest in one shot. periodt.

✨ SYNOPSIS ✨

       void sha512 (const u8 *data , size_t len , u8 out[static
       SHA512_DIGEST_SIZE] );

🎀 ARGUMENTS 🎀

• data — the message data. like, the actual bytes you're feeding her.
• len — the data length in bytes. yes, in bytes, bestie.
• out — (output) the resulting SHA-512 message digest. she writes the digest here, slay.

🦋 CONTEXT 🦋

Any context. literally any context — no special vibe check required, go off.

💅 SEE ALSO 💅

the kernel file ./include/crypto/sha2.h and the whole friend group:

• SHA-224 squad: struct sha224_ctx(9), sha224_init(9), sha224_update(9), sha224_final(9), sha224(9)
• HMAC-SHA-224 squad: 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)
• SHA-256 squad: 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-SHA-256 squad: 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)
• SHA-384 squad: struct sha384_ctx(9), sha384_init(9), sha384_update(9), sha384_final(9), sha384(9)
• HMAC-SHA-384 squad: 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)
• SHA-512 squad: struct sha512_ctx(9), sha512_init(9), sha512_update(9), sha512_final(9)
• HMAC-SHA-512 squad: 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)

one last cute lil sign-off: source/version is ./include/crypto, date is October 2026, and the page is sha512(9). mwah 💋✨