vrf-rs is an open source implementation of Verifiable Random Functions (VRFs) written in Rust.
DISCLAIMER: This is experimental software. Be careful!
This module uses the OpenSSL library to offer Elliptic Curve Verifiable Random Function (VRF) functionality.
It follows the algorithms described in:
Currently the supported cipher suites are:
P256_SHA256_TAI: the aforementioned algorithms with SHA256 and the NIST P-256 curve.K163_SHA256_TAI: the aforementioned algorithms with SHA256 and the NIST K-163 curve.SECP256K1_SHA256_TAI: the aforementioned algorithms with SHA256 and the secp256k1 curve.Create and verify a VRF proof by using the cipher suite SECP256K1_SHA256_TAI:
```rust use vrf::VRF; use vrf::openssl::{CipherSuite, ECVRF};
// Initialization of VRF context by providing a curve
let mut vrf = ECVRF::from_suite(CipherSuite::SECP256K1_SHA256_TAI)?;
// `prove` returns a `Result` with the VRF proof as `Vec<u8>`
let proof = vrf.prove(&secret_key, &message)?;
// `verify` returns a `Result` with the VRF hash output as `Vec<u8>`
let proof_hash = vrf.verify(&public_key, &pi, &message);
```
This library defines a VRF trait which can be extended in order to use different curves and algorithms.
```rust
pub trait VRF
fn prove(&mut self, x: SecretKey, alpha: &[u8]) -> Result<Vec<u8>, Self::Error>;
fn verify(&mut self, y: PublicKey, pi: &[u8], alpha: &[u8]) -> Result<Vec<u8>, Self::Error>;
} ```
vrf-rs is published under the GNU General Public License v3.0.