Struct Challenge 

pub struct Challenge { /* private fields */ }

Deterministic byte stream SHA-256(seed ‖ u32be(ctr)), consumed sequentially.

Implementations

impl Challenge

pub fn seed(&self) -> [u8; 32]

The 32-byte seed (e.g. the commitment B of ro/kg-commit).

pub fn bytes(&mut self, n: usize) -> Vec<u8>

pub fn bits(&mut self, n: u32) -> BoxedUint

Uniform integer below 2^n (precision n rounded up to whole limbs, at least 64).

pub fn pm_pow2(&mut self, ell: u32) -> SBig

e ∈ ±2^ℓ: u − 2^{ℓ−1} + 1 for an ℓ-bit u (§10.3).

pub fn small(&mut self, n: u32) -> u64

ℓ0-bit unsigned challenge as a small integer.

pub fn scalar(&mut self) -> Scalar

Scalar of F_q: 64 bytes reduced modulo q.

pub fn unit_mod(&mut self, m: &Modulus) -> Result<Residue>

y ∈ Z*_M: bits(M)+128 bits reduced mod M, next block while gcd(y, M) ≠ 1.

pub fn qr_mod(&mut self, m: &Modulus) -> Result<Residue>

g ∈ QR_d \ {0, 1}: value mod d from the stream, squared.