sha512_final(9)

💅 sha512_final(9) 💅

okay so this is a page from the Kernel API Manual, and today's main character is sha512_final(9). buckle up bestie, it's short but it slays 🎀

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✨ NAME ✨

sha512_final — finish computing a SHA-512 message digest 🧚

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🌸 SYNOPSIS 🌸

void sha512_final (struct sha512_ctx *ctx , u8 out[static
       SHA512_DIGEST_SIZE] );

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🦋 ARGUMENTS 🦋

• ctx — the context to finalize. it must have been initialized already, no cap — if you didn't init it first, that's on you, not me 🙈
• out — (output) the resulting SHA-512 message digest 💖 this is where the good stuff lands.

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🔥 DESCRIPTION 🔥

so after it finishes doing its thing, this function zeroizes ctx. literally wipes it. and because of that, the caller does not need to do it themselves — it's giving "I already handled it, you're welcome" ✨ periodt.

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👑 CONTEXT 👑

Any context. that's it. any. context. we love a flexible icon 🌈

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💜 SEE ALSO 💜

Kernel file ./include/crypto/sha2.h plus, like, the whole extended universe of crypto friends 🫶 — every single one of them:

• 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(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 I said. the whole family reunion 😭💀

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ngl the zeroize thing is the moment to remember — ctx gets wiped after this call, so don't come back looking for its data later, it's gone gone 💅

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okay that's the whole page, you ate that 🍓 this cutie came out of ./include/crypto and it's dated October 2026 — go forth and hash, bestie 💖✨