crypto_rng_reset(9)

✨ NAME ✨

crypto_rng_reset — okay so this is the one that re-initializes the RNG, and yes bestie, we're in the Kernel API Manual (section 9, kernel API pages, as you can prob guess from the (9)) 💅

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🌸 SYNOPSIS 🌸

int crypto_rng_reset (struct crypto_rng *tfm , const u8 *seed , unsigned
int slen );

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🎀 ARGUMENTS 🎀

• tfm — the cipher handle. that's the RNG you're messing with, she's the main character here 👑
• seed — the seed input data. your lil starter pack of entropy 🍓
• slen — the length of the seed input data. yes, somebody has to count the bytes slen 💀

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🦋 DESCRIPTION 🦋

So like, the reset function completely re-initializes the random number generator that's referenced by the cipher handle — and the way it does that is by clearing the current state. gone. poof. ✨

Then the new state gets initialized either with the seed that the caller provided, or automatically — it lowkey depends on the random number generator type, iykyk. (Fun fact: the SP800-90A DRBGs perform an automatic seeding. so those ones just handle it themselves, no cap.)

The seed is provided as a parameter to this function call. and here's the part where you gotta pay attention bestie: the provided seed should have the length of the seed size defined for the random number generator, as defined by crypto_rng_seedsize. so like, check that before you send it, fr fr 🙈

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⭐ RETURN ⭐

• 0 if the setting of the key was successful 💖
• < 0 if an error occurred 😭

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💜 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_get_bytes(9)
• crypto_rng_seedsize(9)

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and that's the whole page, bestie — go forth and reset some RNGs responsibly 🫶

this lil masterpiece lives in ./include/crypto, dated October 2026, and it goes by crypto_rng_reset(9) — slay 💅✨