Cryptography primitives for Exonum

exonum-crypto provides a high-level API for work with various cryptography tasks.

Capabilities of exonum-crypto include:

• Calculating the hash of data;
• Generating key pairs for work with digital signatures;
• Creating and verifying of digital signatures.

The main backend for exonum-crypto is sodiumoxide, and the used algorithms are:

• SHA-256 for hashing.
• Ed25519 for digital signatures.

Consult the crate docs for more details.

Examples

Signing data and verifying the signature:

exonum_crypto::init();
let (public_key, secret_key) = exonum_crypto::gen_keypair();
let data = [1, 2, 3];
let signature = exonum_crypto::sign(&data, &secret_key);
assert!(exonum_crypto::verify(&signature, &data, &public_key));

Hashing fixed amount of data:

exonum_crypto::init();
let data = [1, 2, 3];
let hash = exonum_crypto::hash(&data);

Hashing data by chunks:

use exonum_crypto::HashStream;

exonum_crypto::init();
let data: Vec<[u8; 5]> = vec![[1, 2, 3, 4, 5], [6, 7, 8, 9, 10]];
let mut hash_stream = HashStream::new();
for chunk in data {
    hash_stream = hash_stream.update(&chunk);
}
let _ = hash_stream.hash();

Usage

Include exonum-crypto as a dependency in your Cargo.toml:

[dependencies]
exonum-crypto = "1.0.0"

License

exonum-crypto is licensed under the Apache License (Version 2.0). See LICENSE for details.