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
4#![cfg_attr(not(feature = "std"), no_std)]
5
6extern crate alloc;
7
8use core::ops::{Deref, DerefMut};
9
10use elliptic_curve::subtle::{Choice, ConditionallySelectable};
11use rand_core::{CryptoRng, RngCore};
12
13pub mod math;
14pub mod matrix;
15
16pub mod bip32;
17
18/// Session ID
19pub type SessionId = ByteArray<32>;
20
21pub type HashBytes = ByteArray<32>;
22
23/// Generate a random byte array
24pub fn random_bytes<const N: usize, R: CryptoRng + RngCore>(
25    rng: &mut R,
26) -> [u8; N] {
27    let mut buf = [0u8; N];
28    rng.fill_bytes(&mut buf);
29    buf
30}
31
32// TODO Use GenericArray<u8, N> ?
33
34#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
35pub struct ByteArray<const T: usize>(pub [u8; T]);
36
37impl<const T: usize> ConditionallySelectable for ByteArray<T> {
38    fn conditional_select(a: &Self, b: &Self, choice: Choice) -> Self {
39        Self(<[u8; T]>::conditional_select(&a.0, &b.0, choice))
40    }
41}
42
43impl<const T: usize> AsRef<[u8]> for ByteArray<T> {
44    fn as_ref(&self) -> &[u8] {
45        &self.0
46    }
47}
48
49impl<const T: usize> Deref for ByteArray<T> {
50    type Target = [u8];
51
52    fn deref(&self) -> &Self::Target {
53        &self.0
54    }
55}
56
57impl<const N: usize> DerefMut for ByteArray<N> {
58    fn deref_mut(&mut self) -> &mut Self::Target {
59        &mut self.0
60    }
61}
62
63impl<const T: usize> Default for ByteArray<T> {
64    fn default() -> Self {
65        Self([0; T])
66    }
67}
68
69impl<const T: usize> ByteArray<T> {
70    pub const fn new(b: [u8; T]) -> Self {
71        Self(b)
72    }
73
74    /// Function to generate a random session id which is a 32 byte array.
75    pub fn random<R: CryptoRng + RngCore>(rng: &mut R) -> Self {
76        let mut bytes = [0; T];
77        rng.fill_bytes(&mut bytes);
78        ByteArray(bytes)
79    }
80}
81
82impl<const N: usize> From<[u8; N]> for ByteArray<N> {
83    fn from(b: [u8; N]) -> Self {
84        ByteArray(b)
85    }
86}
87
88impl<const N: usize> From<&[u8; N]> for ByteArray<N> {
89    fn from(b: &[u8; N]) -> Self {
90        ByteArray(*b)
91    }
92}
93
94impl<const N: usize> From<ByteArray<N>> for [u8; N] {
95    fn from(value: ByteArray<N>) -> Self {
96        value.0
97    }
98}
sl_mpc_mate/lib.rs

sl_mpc_mate/
lib.rs
