crypto_rng_seedsize(9)

✨ crypto_rng_seedsize — obtain seed size of RNG 💅

Okay bestie, so this is from the Kernel API Manual (section 9, crypto_rng_seedsize(9)), and it's literally the glow-up guide for figuring out how much seed a random number generator needs. Buckle up, it's giving crypto realness. 🎀

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🌸 SYNOPSIS 🌸

int crypto_rng_seedsize (struct crypto_rng *tfm );

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💖 ARGUMENTS 💖

• tfm — the cipher handle, aka your backstage pass to the RNG. It's the one you pass in so the function knows which generator we're talking about. No tfm, no tea. 🫖

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🌈 DESCRIPTION 🌈

So the way this works: crypto_rng_seedsize returns the seed size for the random number generator that your cipher handle (tfm) is referencing. Periodt. 💅

Now, plot twist — this value may be zero if the random number generator doesn't implement or doesn't require a reseeding. Like, some RNGs are just out here living their truth with no reseed era. 🙈

For example (and this is the iconic part), the SP800-90A DRBGs implement an automated reseeding after reaching a pre-defined threshold. So they're out here handling their own business, no cap. 🔥

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⭐ RETURN ⭐

Returns the seed size for the random number generator. That's the whole vibe check. 📏✨

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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_reset(9)

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💜 SIGN-OFF 💜

This masterpiece lives in ./include/crypto, dated October 2026, and it's filed under crypto_rng_seedsize(9). Go off, bestie. 🫶👑🌈

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