openmls 0.4.1

This is a WIP Rust implementation of the Messaging Layer Security (MLS) protocol based on draft 12+.
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

//! This module contains tests regarding the use of [`MessageSecretsStore`]

use crate::{
    group::past_secrets::MessageSecretsStore, schedule::message_secrets::MessageSecrets,
    test_utils::*,
};

#[apply(ciphersuites_and_backends)]
fn test_secret_tree_store(ciphersuite: Ciphersuite, backend: &impl OpenMlsCryptoProvider) {
    // Create a store that keeps up to 3 epochs
    let mut message_secrets_store =
        MessageSecretsStore::new_with_secret(3, MessageSecrets::random(ciphersuite, backend, 0));

    // Add message secrets to the store
    message_secrets_store.add(
        0,
        MessageSecrets::random(ciphersuite, backend, 0),
        Vec::new(),
    );

    // Make sure we can access the message secrets we just stored
    assert!(message_secrets_store.secrets_for_epoch_mut(0).is_some());

    // Add 5 more message secrets, this should drop trees from earlier epochs
    for i in 1..6u64 {
        message_secrets_store.add(
            i,
            MessageSecrets::random(ciphersuite, backend, 0),
            Vec::new(),
        );
    }

    // These epochs should be in the store
    assert!(message_secrets_store.secrets_for_epoch_mut(3).is_some());
    assert!(message_secrets_store.secrets_for_epoch_mut(4).is_some());
    assert!(message_secrets_store.secrets_for_epoch_mut(5).is_some());

    // These epochs should not be in the store
    assert!(message_secrets_store.secrets_for_epoch_mut(0).is_none());
    assert!(message_secrets_store.secrets_for_epoch_mut(1).is_none());
    assert!(message_secrets_store.secrets_for_epoch_mut(2).is_none());
    assert!(message_secrets_store.secrets_for_epoch_mut(6).is_none());
}

#[apply(ciphersuites_and_backends)]
fn test_empty_secret_tree_store(ciphersuite: Ciphersuite, backend: &impl OpenMlsCryptoProvider) {
    // Create a store that keeps no epochs
    let mut message_secrets_store =
        MessageSecretsStore::new_with_secret(0, MessageSecrets::random(ciphersuite, backend, 0));

    // Add message secrets to the store
    message_secrets_store.add(
        0,
        MessageSecrets::random(ciphersuite, backend, 0),
        Vec::new(),
    );

    // Make sure we cannot access the message secrets we just stored
    assert!(message_secrets_store.secrets_for_epoch_mut(0).is_none());
}