hmac_sha1_preparekey(9)

💅 hmac_sha1_preparekey — from the Kernel API Manual, bestie 💖

okay so you found a page from the Kernel API Manual and it's literally about getting your key ready for HMAC-SHA1. it's giving ✨crypto prep era✨ and honestly? we're obsessed.

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✨ NAME ✨

hmac_sha1_preparekey — get a key all prepped and ready for HMAC-SHA1 🎀

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🌸 SYNOPSIS 🌸

void hmac_sha1_preparekey (struct hmac_sha1_key *key , const u8 *raw_key
, size_t raw_key_len );

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🦋 ARGUMENTS 🦋

• key — (output) bestie this is the key structure you're initializing, she's the main character 🌟
• raw_key — the raw HMAC-SHA1 key, your actual key material fr fr 🔑
• raw_key_len — the key length in bytes. and the way that all key lengths are supported?? no cap, every single one 👑💅

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🙈 NOTE 🙈

🚨 listen up bestie, this part is important 🚨 the caller is responsible for zeroizing both the struct hmac_sha1_key and the raw key once they're no longer needed. that's on you, not on the function. don't leave your secrets lying around in memory, it's not the vibe 💀

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💜 CONTEXT 💜

Any context. literally any. she's flexible like that 🧚✨

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🌈 SEE ALSO 🌈

• Kernel file ./include/crypto/sha1.h
• struct sha1_ctx(9)
• sha1_init(9)
• sha1_update(9)
• sha1_final(9)
• sha1(9)
• struct hmac_sha1_key(9)
• struct hmac_sha1_ctx(9)
• hmac_sha1_init(9)
• hmac_sha1_init_usingrawkey(9)
• hmac_sha1_update(9)
• hmac_sha1_final(9)
• hmac_sha1(9)
• hmac_sha1_usingrawkey(9)

like a whole friend group of functions, they all ate 🔥

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and that's the page!! sourced from ./include/crypto, dated October 2026 — so fresh, so iconic, periodt 💖🫶🌸