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Print group public key (#283) 

Keygen implementation
Fix APACHE License
This commit is contained in:
natalie 2023-04-11 16:05:05 +01:00
parent f179ff8421
commit 4b25c4b7a4
8 changed files with 268 additions and 134 deletions
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1
.gitignore vendored Normal file → Executable file
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@ -1 +1,2 @@
/target
.vscode/*

240
Cargo.lock generated
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version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
[[package]]
name = "windows_x86_64_msvc"
version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
[[package]]
name = "windows_x86_64_msvc"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
[[package]]
name = "zeroize"
version = "1.5.7"
@ -1207,7 +1277,7 @@ version = "1.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "44bf07cb3e50ea2003396695d58bf46bc9887a1f362260446fad6bc4e79bd36c"
dependencies = [
"proc-macro2 1.0.52",
"proc-macro2 1.0.56",
"quote 1.0.26",
"syn 1.0.109",
"synstructure",

2
Cargo.toml
View File

@ -8,3 +8,5 @@ edition = "2021"
[dependencies]
frost-ed25519 = "0.1.0"
thiserror = "1.0"
rand = "0.8"
hex = "0.4"

2
LICENSE-APACHE
View File

@ -188,7 +188,7 @@ APPENDIX: How to apply the Apache License to your work.
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright 2023 Zcash Foundation
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.

79
src/keygen.rs Executable file
View File

@ -0,0 +1,79 @@
use frost::keys::KeyPackage;
use frost::round1::{SigningCommitments, SigningNonces};
use frost::round2::SignatureShare;
use frost::{Identifier, SigningPackage, VerifyingKey};
use frost_ed25519 as frost;
use rand::rngs::ThreadRng;
use rand::thread_rng;
use std::collections::HashMap;
use crate::inputs::Config;
pub fn keygen(config: Config) -> Result<VerifyingKey, frost::Error> {
let mut rng = thread_rng();
let max_signers = config.max_signers;
let min_signers = config.min_signers;
let (shares, pubkeys) = frost::keys::keygen_with_dealer(max_signers, min_signers, &mut rng)?;
let key_packages: HashMap<_, _> = shares
.into_iter()
.map(|share| Ok((share.identifier, frost::keys::KeyPackage::try_from(share)?)))
.collect::<Result<_, frost::Error>>()?;
let (nonces, commitments) = generate_nonces_and_commitments(min_signers, &key_packages, rng);
let message = "message to sign".as_bytes(); // TODO: choose message
let comms = commitments.into_values().collect();
let signing_package = frost::SigningPackage::new(comms, message.to_vec());
let signature_shares = generate_signature_shares(nonces, &key_packages, &signing_package);
let group_signature = frost::aggregate(&signing_package, &signature_shares[..], &pubkeys)?;
let verify_signature = pubkeys.group_public.verify(message, &group_signature);
match verify_signature {
Ok(_) => Ok(pubkeys.group_public),
Err(_) => Err(frost::Error::InvalidSignature), // TODO: Use correct error
}
}
fn generate_nonces_and_commitments(
min_signers: u16,
key_packages: &HashMap<Identifier, KeyPackage>,
mut rng: ThreadRng,
) -> (
HashMap<Identifier, SigningNonces>,
HashMap<Identifier, SigningCommitments>,
) {
let mut nonces = HashMap::new();
let mut commitments = HashMap::new();
for participant_index in 1..(min_signers + 1) {
let participant_identifier = participant_index.try_into().expect("should be nonzero");
let (nonce, commitment) = frost::round1::commit(
participant_identifier,
key_packages[&participant_identifier].secret_share(),
&mut rng,
);
nonces.insert(participant_identifier, nonce);
commitments.insert(participant_identifier, commitment);
}
(nonces, commitments)
}
fn generate_signature_shares(
nonces: HashMap<Identifier, SigningNonces>,
key_packages: &HashMap<Identifier, KeyPackage>,
signing_package: &SigningPackage,
) -> Vec<SignatureShare> {
let mut signature_shares = Vec::new();
for participant_identifier in nonces.keys() {
let key_package = &key_packages[participant_identifier];
let nonces_to_use = &nonces[participant_identifier];
let signature_share =
frost::round2::sign(signing_package, nonces_to_use, key_package).unwrap(); //TODO: handle errors
signature_shares.push(signature_share);
}
signature_shares
}

15
src/main.rs Normal file → Executable file
View File

@ -1,12 +1,18 @@
mod inputs;
mod keygen;
#[cfg(test)]
mod tests;
use std::io;
use frost::VerifyingKey;
use frost_ed25519 as frost;
use keygen::keygen;
use crate::inputs::{request_inputs, validate_inputs};
fn main() -> io::Result<()> {
// TODO: error handling
let config = request_inputs();
let out = validate_inputs(&config);
@ -16,5 +22,14 @@ fn main() -> io::Result<()> {
Err(e) => println!("An error occurred: {e}"),
}
// Print outputs
let keygen = keygen(config).unwrap();
print_values(&keygen);
Ok(())
}
fn print_values(group_public_key: &VerifyingKey) {
println!("Group public key: {:?}", &group_public_key.to_bytes());
}

50
src/tests.rs Normal file → Executable file
View File

@ -1,48 +1,2 @@
use crate::inputs::{validate_inputs, Config};
#[test]
fn check_valid_input_for_signers() {
let config = Config {
min_signers: 2,
max_signers: 3,
};
let expected = validate_inputs(&config);
assert_eq!(expected, Ok(config));
}
#[test]
fn return_error_if_min_participant_greater_than_max_participant() {
let config = Config {
min_signers: 4,
max_signers: 3,
};
let expected = validate_inputs(&config);
assert_eq!(expected, Err(frost_ed25519::Error::InvalidMinSigners));
}
#[test]
fn return_error_if_min_participant_is_less_than_2() {
let config = Config {
min_signers: 1,
max_signers: 3,
};
let expected = validate_inputs(&config);
assert_eq!(expected, Err(frost_ed25519::Error::InvalidMinSigners));
}
#[test]
fn return_error_if_max_participant_is_less_than_2() {
let config = Config {
min_signers: 2,
max_signers: 1,
};
let expected = validate_inputs(&config);
assert_eq!(expected, Err(frost_ed25519::Error::InvalidMaxSigners));
}
mod inputs_tests;
mod integration_tests;

13
src/tests/integration_tests.rs Normal file
View File

@ -0,0 +1,13 @@
use crate::{inputs::Config, keygen};
#[test]
fn check_keygen() {
let config = Config {
min_signers: 2,
max_signers: 3,
};
let keygen = keygen(config);
assert!(keygen.is_ok());
}