vodozemac 0.10.0

A Rust implementation of Olm and Megolm
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

// Copyright 2022 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use serde::{Deserialize, Serialize};

/// A struct to configure how Megolm sessions should work under the hood.
/// Currently only the MAC truncation behaviour can be configured.
#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq)]
pub struct SessionConfig {
    pub(super) version: Version,
}

#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq)]
pub(super) enum Version {
    V1 = 1,
    #[cfg(feature = "experimental-session-config")]
    V2 = 2,
}

impl SessionConfig {
    /// Get the numeric version of this `SessionConfig`.
    pub const fn version(&self) -> u8 {
        self.version as u8
    }

    /// Create a `SessionConfig` for the Megolm version 1. This version of
    /// Megolm uses AES-256 and HMAC with a truncated MAC to encrypt individual
    /// messages. The MAC will be truncated to 8 bytes.
    pub const fn version_1() -> Self {
        SessionConfig { version: Version::V1 }
    }

    /// Create a `SessionConfig` for the Megolm version 2. This version of
    /// Megolm uses AES-256 and HMAC to encrypt individual messages. The MAC
    /// won't be truncated.
    #[cfg(feature = "experimental-session-config")]
    pub const fn version_2() -> Self {
        SessionConfig { version: Version::V2 }
    }
}

impl Default for SessionConfig {
    fn default() -> Self {
        Self::version_1()
    }
}

#[cfg(test)]
mod test {
    use crate::megolm::{SessionConfig, session_config::Version};

    #[test]
    fn version() {
        assert_eq!(SessionConfig::version_1().version(), Version::V1 as u8);
        #[cfg(feature = "experimental-session-config")]
        assert_eq!(SessionConfig::version_2().version(), Version::V2 as u8);
    }
}