efficient-sm2 0.1.5

A Rust Library of China's Standards of Signature Algorithms (SM2)
Documentation 
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// Copyright 2020 Yao Pengfei.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

use rand::rngs::ThreadRng;
use rand::Rng;

/// A secure random number generator.
pub trait SecureRandom {
    /// Fills `dest` with random bytes.
    fn fill(&mut self, dest: &mut [u8]);
}

pub struct DefaultRand(pub ThreadRng);

impl SecureRandom for DefaultRand {
    fn fill(&mut self, dest: &mut [u8]) {
        self.0.fill(dest)
    }
}