blob: 4814398793cde7053c6def393389a1ee87af590c (
plain)
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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
// Copyright 2017 int08h LLC
//
// 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.
//!
//! An implementation of the [Roughtime](https://roughtime.googlesource.com/roughtime)
//! secure time synchronization protocol.
//!
//! Roughtime aims to achieve rough time synchronisation in a secure way that doesn't
//! depend on any particular time server, and in such a way that, if a time server does
//! misbehave, clients end up with cryptographic proof of it.
//!
//! # Protocol
//!
//! Roughtime messages are represetned by [`RtMessage`](struct.RtMessage.html) which
//! implements the mapping of Roughtime `u32` [`tags`](enum.Tag.html) to byte-strings.
//!
//! # Client
//!
//! A Roughtime client can be found in `src/bin/client.rs`. To run the client:
//!
//! ```bash
//! $ cargo run --release --bin client roughtime.int08h.com 2002
//! ```
//!
//! Consult the client's `--help` output for all runtime options.
//!
//! # Server
//!
//! A Roughtime server implementation is in `src/bin/server.rs`. The server is
//! configured via a yaml file:
//!
//! ```yaml
//! interface: 127.0.0.1
//! port: 8686
//! seed: f61075c988feb9cb700a4a6a3291bfbc9cab11b9c9eca8c802468eb38a43d7d3
//! batch_size: 64
//! ```
//!
//! Where:
//!
//! * **interface** - IP address or interface name for listening to client requests
//! * **port** - UDP port to listen to requests
//! * **seed** - A 32-byte hexadecimal value used as the seed to generate the
//! server's long-term key pair. **This is a secret value**, treat it
//! with care.
//! * **batch_size** - The number of requests to process in one batch. All nonces
//! in a batch are used to build a Merkle tree, the root of which
//! is signed.
//!
//! To run the server:
//!
//! ```bash
//! $ cargo run --release --bin server /path/to/config.file
//! ```
//!
extern crate byteorder;
mod error;
mod tag;
mod message;
pub mod sign;
pub mod merkle;
pub use error::Error;
pub use tag::Tag;
pub use message::RtMessage;
/// Version of Roughenough
pub const VERSION: &str = "1.0.0";
// Constants and magic numbers of the Roughtime protocol
/// Minimum size (in bytes) of a client request
pub const MIN_REQUEST_LENGTH: u32 = 1024;
/// Minimum size (in bytes) of seeds used to derive private keys
pub const MIN_SEED_LENGTH: u32 = 32;
/// Size (in bytes) of an Ed25519 public key
pub const PUBKEY_LENGTH: u32 = 32;
/// Size (in bytes) of the client's nonce
pub const NONCE_LENGTH: u32 = 64;
/// Size (in bytes) of an Ed25519 signature
pub const SIGNATURE_LENGTH: u32 = 64;
/// Size (in bytes) of a SHA-512 hash
pub const HASH_LENGTH: u32 = 64;
/// Size (in bytes) of server's timestamp value
pub const TIMESTAMP_LENGTH: u32 = 8;
/// Size (in bytes) of server's time uncertainty value
pub const RADIUS_LENGTH: u32 = 4;
/// Prefixed to the server's certificate before generating or verifying certificate's signature
pub const CERTIFICATE_CONTEXT: &str = "RoughTime v1 delegation signature--\x00";
/// Prefixed to the server's response before generating or verifying the server's signature
pub const SIGNED_RESPONSE_CONTEXT: &str = "RoughTime v1 response signature\x00";
/// Value prepended to leaves prior to hashing
pub const TREE_LEAF_TWEAK: &[u8] = &[0x00];
/// Value prepended to nodes prior to hashing
pub const TREE_NODE_TWEAK: &[u8] = &[0x01];
|
