ed25519_dalek/
constants.rs

1// -*- mode: rust; -*-
2//
3// This file is part of ed25519-dalek.
4// Copyright (c) 2017-2019 isis lovecruft
5// See LICENSE for licensing information.
6//
7// Authors:
8// - isis agora lovecruft <isis@patternsinthevoid.net>
9
10//! Common constants such as buffer sizes for keypairs and signatures.
11
12/// The length of a ed25519 `Signature`, in bytes.
13pub const SIGNATURE_LENGTH: usize = 64;
14
15/// The length of a ed25519 `SecretKey`, in bytes.
16pub const SECRET_KEY_LENGTH: usize = 32;
17
18/// The length of an ed25519 `PublicKey`, in bytes.
19pub const PUBLIC_KEY_LENGTH: usize = 32;
20
21/// The length of an ed25519 `Keypair`, in bytes.
22pub const KEYPAIR_LENGTH: usize = SECRET_KEY_LENGTH + PUBLIC_KEY_LENGTH;
23
24/// The length of the "key" portion of an "expanded" ed25519 secret key, in bytes.
25const EXPANDED_SECRET_KEY_KEY_LENGTH: usize = 32;
26
27/// The length of the "nonce" portion of an "expanded" ed25519 secret key, in bytes.
28const EXPANDED_SECRET_KEY_NONCE_LENGTH: usize = 32;
29
30/// The length of an "expanded" ed25519 key, `ExpandedSecretKey`, in bytes.
31pub const EXPANDED_SECRET_KEY_LENGTH: usize =
32    EXPANDED_SECRET_KEY_KEY_LENGTH + EXPANDED_SECRET_KEY_NONCE_LENGTH;