pub trait RandomMod: Sized + Zero {
    // Required method
    fn random_mod(rng: &mut impl CryptoRngCore, modulus: &NonZero<Self>) -> Self;
}
Available on crate feature rand_core only.
Expand description

Modular random number generation support.

Required Methods§

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fn random_mod(rng: &mut impl CryptoRngCore, modulus: &NonZero<Self>) -> Self

Generate a cryptographically secure random number which is less than a given modulus.

This function uses rejection sampling, a method which produces an unbiased distribution of in-range values provided the underlying CSRNG is unbiased, but runs in variable-time.

The variable-time nature of the algorithm should not pose a security issue so long as the underlying random number generator is truly a CSRNG, where previous outputs are unrelated to subsequent outputs and do not reveal information about the RNG’s internal state.

Object Safety§

This trait is not object safe.

Implementors§

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impl RandomMod for Limb

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impl<const LIMBS: usize> RandomMod for Uint<LIMBS>