sl_mpc_mate/
lib.rs

1// Copyright (c) Silence Laboratories Pte. Ltd. All Rights Reserved.
2// This software is licensed under the Silence Laboratories License Agreement.
3
4use std::ops::{Deref, DerefMut};
5
6use elliptic_curve::subtle::{Choice, ConditionallySelectable};
7use rand::prelude::*;
8
9pub mod math;
10pub mod matrix;
11
12pub mod bip32;
13
14/// Session ID
15pub type SessionId = ByteArray<32>;
16
17pub type HashBytes = ByteArray<32>;
18
19/// Generate a random byte array
20pub fn random_bytes<const N: usize, R: CryptoRng + RngCore>(
21    rng: &mut R,
22) -> [u8; N] {
23    let mut buf = [0u8; N];
24    rng.fill_bytes(&mut buf);
25    buf
26}
27
28// TODO Use GenericArray<u8, N> ?
29
30#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
31pub struct ByteArray<const T: usize>(pub [u8; T]);
32
33impl<const T: usize> ConditionallySelectable for ByteArray<T> {
34    fn conditional_select(a: &Self, b: &Self, choice: Choice) -> Self {
35        Self(<[u8; T]>::conditional_select(&a.0, &b.0, choice))
36    }
37}
38
39impl<const T: usize> AsRef<[u8]> for ByteArray<T> {
40    fn as_ref(&self) -> &[u8] {
41        &self.0
42    }
43}
44
45impl<const T: usize> Deref for ByteArray<T> {
46    type Target = [u8];
47
48    fn deref(&self) -> &Self::Target {
49        &self.0
50    }
51}
52
53impl<const N: usize> DerefMut for ByteArray<N> {
54    fn deref_mut(&mut self) -> &mut Self::Target {
55        &mut self.0
56    }
57}
58
59impl<const T: usize> Default for ByteArray<T> {
60    fn default() -> Self {
61        Self([0; T])
62    }
63}
64
65impl<const T: usize> ByteArray<T> {
66    pub const fn new(b: [u8; T]) -> Self {
67        Self(b)
68    }
69
70    /// Function to generate a random session id which is a 32 byte array.
71    pub fn random<R: CryptoRng + Rng>(rng: &mut R) -> Self {
72        let mut bytes = [0; T];
73        rng.fill_bytes(&mut bytes);
74        ByteArray(bytes)
75    }
76}
77
78impl<const N: usize> From<[u8; N]> for ByteArray<N> {
79    fn from(b: [u8; N]) -> Self {
80        ByteArray(b)
81    }
82}
83
84impl<const N: usize> From<&[u8; N]> for ByteArray<N> {
85    fn from(b: &[u8; N]) -> Self {
86        ByteArray(*b)
87    }
88}
89
90impl<const N: usize> From<ByteArray<N>> for [u8; N] {
91    fn from(value: ByteArray<N>) -> Self {
92        value.0
93    }
94}
sl_mpc_mate/lib.rs

sl_mpc_mate/
lib.rs
