crypto_ecdh_encode_key(9)

💜 crypto_ecdh_encode_key(9) 💜

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page for crypto_ecdh_encode_key, and it's literally the glow-up step where your private key gets turned into its packet form 🎀

---

🌸 NAME 🌸

crypto_ecdh_encode_key — encode the private key 💅

---

✨ SYNOPSIS ✨

int crypto_ecdh_encode_key (char *buf , unsigned int len , const struct
ecdh *p );

like, that's the whole signature, no cap 🫶

---

🦋 ARGUMENTS 🦋

• buf — the buffer your caller-self allocated to hold the packet ECDH private key 💖 and listen, it should be at least crypto_ecdh_key_len bytes in size, so don't be out here under-sizing it bestie 😭
• len — the length of the packet private key buffer 📏
• p — the buffer holding the caller-specified private key 👑

---

⭐ DESCRIPTION ⭐

so the tea is: the ECDH implementations operate on a packet representation of the private key 🔥 that's it, that's the vibe — this is the function that gets you there 💫

---

🍓 RETURN 🍓

• -EINVAL — returned if the buffer has insufficient size 🙈 (the vibe check failed, the buffer was too small)
• 0 — on success 👑 slay

---

🌈 SEE ALSO 🌈

• Kernel file ./include/crypto/ecdh.h 📁
• ECDH Helper Functions(9)
• struct ecdh(9)
• crypto_ecdh_key_len(9)
• crypto_ecdh_decode_key(9) — the reverse icon, iykyk 💅

---

ngl this one's short and sweet — just make sure your buf is big enough before you call it, fr fr 🧚

---

and that's the page!! 🎀 from ./include/crypto, October 2026, crypto_ecdh_encode_key(9), Kernel API Manual — mwah, go encode those keys bestie 💜🦋✨