crypto_rng_get_bytes(9)

💖 crypto_rng_get_bytes(9) 💖

okay bestie, welcome to the Kernel API Manual — today's main character is crypto_rng_get_bytes, aka the little function that hands you random numbers. no cap, it's giving "glow-up for your buffer" ✨

---

🌸 NAME 🌸

crypto_rng_get_bytes — get random number. that's it. that's the whole vibe. 🎲

---

✨ SYNOPSIS ✨

int crypto_rng_get_bytes (struct crypto_rng *tfm , u8 *rdata , unsigned
int dlen );

like, it returns an int, and it takes three lil friends. slay 💅

---

🎀 ARGUMENTS 🎀

• tfm — the cipher handle 🫶 literally the RNG's whole identity, hold it gently.
• rdata — your output buffer, and yes it's where the random numbers go to live their best life.
• dlen — the length of that output buffer. please tell it the truth, it needs to know 😭

---

🦋 DESCRIPTION 🦋

so here's the tea ☕ — this function fills the caller-allocated buffer with random numbers, using the random number generator that the cipher handle (tfm) is referencing. you bring the buffer, it brings the chaos. iconic partnership honestly. 🔥

bestie note: caller-allocated means YOU made the buffer. it's not gonna do it for you. no free rides, only free random bytes. 💀

---

⭐ RETURN ⭐

• 0 — function was successful, we ate and left no crumbs 👑
• < 0 — an error occurred 😭 vibe check failed, go read the error code

---

🌈 SEE ALSO 🌈

• Kernel file ./include/crypto/rng.h struct rng_alg(9)
• crypto_stdrng_get_bytes(9)
• Random number generator API(9)
• crypto_alloc_rng(9)
• crypto_rng_alg(9)
• crypto_free_rng(9)
• crypto_rng_generate(9)
• crypto_rng_reset(9)
• crypto_rng_seedsize(9)

iykyk — go read them all, they're the friend group 💜

---

and that's the whole page, bestie 💖 this one came from ./include/crypto, dated October 2026 — so go forth, fill your buffers with randomness, and remember: stay random, stay iconic 🧚‍♀️🌸✨