crypto_ecdh_key_len(9)

💅 crypto_ecdh_key_len(9)

okay so bestie, welcome to the Kernel API Manual ✨ this one's a lil baby function but she's lowkey carrying the whole ECDH handshake vibe, so let's give her the main character energy she deserves 🎀

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🌸 NAME 🌸

crypto_ecdh_key_len — Obtain the size of the private ECDH key 💖

✨ SYNOPSIS ✨

unsigned int crypto_ecdh_key_len (const struct ecdh *params );

like, that's it. that's the whole call. iconic behavior honestly 🦋

🫶 ARGUMENTS 🫶

• params — your private ECDH key, bestie. that's the struct pointer you're handing over so she can do her little size math 🔥

👑 DESCRIPTION 👑

so what she does is: this function returns the packet ECDH key size 💫 and the way you use it is lowkey genius — a caller can take that number, pair it with the ECDH private key reference they already have (params, hiii), and boom 💥 that's the required memory size to hold a packet key. no guessing, no vibes-based malloc, just the exact amount of memory you need. she ate and left no crumbs fr fr 🍓

🌈 RETURN 🌈

size of the key in bytes 📏✨ (yes, in bytes. keep up bestie 💅)

💜 SEE ALSO 💜

• Kernel file ./include/crypto/ecdh.h — go read it, it's giving required reading 📚
• ECDH Helper Functions(9) 🧚
• struct ecdh(9) 🦋
• crypto_ecdh_encode_key(9) 💖
• crypto_ecdh_decode_key(9) ⭐

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ngl bestie, if you're calling this before you allocate your packet key buffer, you're already winning 💅✨

okay that's the whole page!! sending you off with the cutest sign-off ever: this lil beauty lives in ./include/crypto 🎀, she's tagged October 2026 🗓️, and her full glow-up name is crypto_ecdh_key_len(9) 👑💖 go forth and compute your key sizes, mwah!! 🫶🌸