vsss-rs 5.4.0

Verifiable Secret Sharing Schemes for splitting, combining and verifying secret shares
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

/*
    Copyright Michael Lodder. All Rights Reserved.
    SPDX-License-Identifier: Apache-2.0
*/
use super::invalid::*;
use super::valid::*;
use crate::tests::standard::TestShare;
use crate::*;
#[cfg(all(test, any(feature = "alloc", feature = "std")))]
use elliptic_curve::ff::PrimeField;
#[cfg(all(test, any(feature = "alloc", feature = "std")))]
use k256::{NonZeroScalar, SecretKey};
use k256::{ProjectivePoint, Scalar};
#[cfg(all(test, any(feature = "alloc", feature = "std")))]
use rand::rngs::OsRng;

#[test]
fn invalid_tests() {
    split_invalid_args::<TestShare<Scalar>, ValueGroup<ProjectivePoint>>();
    combine_invalid::<Scalar>();
}

#[test]
fn valid_tests() {
    combine_single::<ProjectivePoint>();
}

#[cfg(any(feature = "alloc", feature = "std"))]
#[test]
fn valid_std_tests() {
    combine_all::<ProjectivePoint>();
}

#[cfg(any(feature = "alloc", feature = "std"))]
#[test]
fn key_tests() {
    let mut osrng = OsRng::default();
    let sk = SecretKey::random(&mut osrng);
    let secret = IdentifierPrimeField::from(*sk.to_nonzero_scalar());
    let res = shamir::split_secret::<TestShare<Scalar>>(2, 3, &secret, &mut osrng);
    assert!(res.is_ok());
    let shares = res.unwrap();
    let res = shares.combine();
    assert!(res.is_ok());
    let scalar: Scalar = *(res.unwrap());
    let nzs_dup = NonZeroScalar::from_repr(scalar.to_repr()).unwrap();
    let sk_dup = SecretKey::from(nzs_dup);
    assert_eq!(sk_dup.to_bytes(), sk.to_bytes());
}

#[cfg(all(feature = "serde", any(feature = "alloc", feature = "std")))]
#[test]
fn share_binary_serde() {
    let sk = DefaultShare::<IdentifierPrimeField<Scalar>, IdentifierPrimeField<Scalar>>::with_identifier_and_value(
        IdentifierPrimeField::<Scalar>::ONE,
        IdentifierPrimeField::<Scalar>::ONE,
    );
    let res = serde_bare::to_vec(&sk);
    assert!(res.is_ok());
    let bytes = res.unwrap();
    let res = serde_bare::from_slice::<
        DefaultShare<IdentifierPrimeField<Scalar>, IdentifierPrimeField<Scalar>>,
    >(&bytes);
    assert!(res.is_ok());
    let sk2 = res.unwrap();
    assert_eq!(sk, sk2);

    let res = postcard::to_stdvec(&sk);
    assert!(res.is_ok());
    let bytes = res.unwrap();
    let res = postcard::from_bytes::<
        DefaultShare<IdentifierPrimeField<Scalar>, IdentifierPrimeField<Scalar>>,
    >(&bytes);
    assert!(res.is_ok());
    let sk3 = res.unwrap();
    assert_eq!(sk, sk3);

    let res = serde_cbor::to_vec(&sk);
    assert!(res.is_ok());
    let bytes = res.unwrap();
    let res = serde_cbor::from_slice::<
        DefaultShare<IdentifierPrimeField<Scalar>, IdentifierPrimeField<Scalar>>,
    >(&bytes);
    assert!(res.is_ok());
    let sk4 = res.unwrap();
    assert_eq!(sk, sk4);

    let mut buffer = Vec::with_capacity(86);
    let res = ciborium::into_writer(&sk, &mut buffer);
    assert!(res.is_ok());
    println!("buffer.len(): {}", buffer.len());
    let res = ciborium::from_reader::<
        DefaultShare<IdentifierPrimeField<Scalar>, IdentifierPrimeField<Scalar>>,
        _,
    >(&buffer[..]);
    assert!(res.is_ok());
    let sk5 = res.unwrap();
    assert_eq!(sk, sk5);
}