crypto_dh_key_len(9)

✨ crypto_dh_key_len(9) — kernel API manual energy ✨

okay so bestie, we're in the <pink>Kernel API Manual</pink> today and this one is a little one-shot function that tells you how much memory a private DH key is gonna need. no cap, it's tiny but iconic 💅

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🌸 NAME 🌸

crypto_dh_key_len — obtain the size of the private DH key

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🎀 SYNOPSIS 🎀

unsigned int crypto_dh_key_len (const struct dh *params );

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🦋 ARGUMENTS 🦋

• params — the private DH key, bestie. that's the one and only thing you're handing over 🫶

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💖 DESCRIPTION 💖

so this function literally just returns the <cyan>packet DH key size</cyan>. that's the vibe.

a caller can take that size, pair it with the DH private key reference you already have, and boom — you know the required memory size to hold a packet key ✨ it's giving "measure twice, allocate once" honestly 👑

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🔥 RETURN 🔥

size of the key in bytes. that's it, that's the whole tea ☕ (unsigned int, for the record 💜)

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🌈 SEE ALSO 🌈

• Kernel file ./include/crypto/dh.h DH Helper Functions(9)
• struct dh(9)
• crypto_dh_encode_key(9)
• crypto_dh_decode_key(9)
• __crypto_dh_decode_key(9)

ngl if you're poking around this family of functions, the whole DH helper squad above is your group chat — go say hi 🙈

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and that's the page, bestie! slay 💅 this little gem lives over in ./include/crypto and the source/version stamp on it is October 2026 🎀 so cute, so on-brand, periodt ⭐✨💖