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|
mod args;
use args::{Args, KeyType};
use tor_llcrypto::pk::ed25519::Ed25519PublicKey as _;
use tor_llcrypto::util::rng::RngCompat;
use std::fs;
use clap::Parser;
use ssh_key::private::{DsaKeypair, Ed25519Keypair, Ed25519PrivateKey, OpaqueKeypair};
use ssh_key::public::{DsaPublicKey, Ed25519PublicKey, OpaquePublicKey};
use ssh_key::{self, Algorithm, AlgorithmName, PrivateKey, PublicKey};
use tor_basic_utils::test_rng::testing_rng;
use tor_llcrypto::pk::{curve25519, ed25519};
/// A helper for creating a ([`PrivateKey`], [`PublicKey`]) pair.
macro_rules! make_openssh_key {
($kind:tt, $args:expr, $keypair:expr, $public:expr) => {{
let comment = $args.comment.clone().unwrap_or("test-key".into());
let openssh_key = ssh_key::public::PublicKey::new(
ssh_key::public::KeyData::$kind($public),
comment.clone(),
);
let openssh_private = ssh_key::private::PrivateKey::new(
ssh_key::private::KeypairData::$kind($keypair),
comment,
)
.unwrap();
(openssh_private, openssh_key)
}};
}
/// Generate an ed25519-expanded ssh key.
fn generate_expanded_ed25519(args: &Args) -> (PrivateKey, PublicKey) {
let algo = args
.algorithm
.clone()
.unwrap_or("[email protected]".into());
let algorithm_name = AlgorithmName::new(algo).unwrap();
let mut rng = testing_rng();
let ed25519_kp = ed25519::Keypair::generate(&mut rng);
let expanded_kp: ed25519::ExpandedKeypair = (&ed25519_kp).into();
let ssh_public = OpaquePublicKey::new(
expanded_kp.public().to_bytes().to_vec(),
Algorithm::Other(algorithm_name),
);
let keypair = OpaqueKeypair::new(
expanded_kp.to_secret_key_bytes().to_vec(),
ssh_public.clone(),
);
make_openssh_key!(Other, args, keypair, ssh_public)
}
/// Generate an ed25519-expanded ssh key.
fn generate_ed25519(args: &Args) -> (PrivateKey, PublicKey) {
let mut rng = testing_rng();
let ed25519_kp = ed25519::Keypair::generate(&mut rng);
let public_key_bytes: [u8; 32] = ed25519_kp
.public_key()
.to_bytes()
.to_vec()
.try_into()
.unwrap();
let public = Ed25519PublicKey(public_key_bytes);
let secret_key_bytes: [u8; 32] = ed25519_kp.to_bytes().to_vec().try_into().unwrap();
let private = Ed25519PrivateKey::from_bytes(&secret_key_bytes);
let keypair = Ed25519Keypair { public, private };
make_openssh_key!(Ed25519, args, keypair, public)
}
/// Generate a DSA ssh key.
fn generate_dsa(args: &Args) -> (PrivateKey, PublicKey) {
let mut rng = RngCompat::new(testing_rng());
let keypair = DsaKeypair::random(&mut rng).unwrap();
let public = DsaPublicKey::from(&keypair);
make_openssh_key!(Dsa, args, keypair, public)
}
/// Generate an x25519 ssh key.
fn generate_x25519(args: &Args) -> (PrivateKey, PublicKey) {
let rng = testing_rng();
let x25519_sk = curve25519::StaticSecret::random_from_rng(rng);
let x25519_pk = curve25519::PublicKey::from(&x25519_sk);
let algo = args
.algorithm
.clone()
.unwrap_or("[email protected]".into());
let algorithm_name = AlgorithmName::new(algo).unwrap();
let public = OpaquePublicKey::new(
x25519_pk.to_bytes().to_vec(),
Algorithm::Other(algorithm_name),
);
let keypair = OpaqueKeypair::new(x25519_sk.to_bytes().to_vec(), public.clone());
make_openssh_key!(Other, args, keypair, public)
}
fn main() {
let args = Args::parse();
// Figure out if we're generating a public key, a private key, or both.
let (gen_pub, gen_priv) = match (args.public, args.private) {
(false, false) => {
// If neither --public nor --private is specified, generate both.
(true, true)
}
(gen_pub, gen_priv) => (gen_pub, gen_priv),
};
let (openssh_private, openssh_public) = match &args.key_type {
KeyType::ExpandedEd25519 => generate_expanded_ed25519(&args),
KeyType::Ed25519 => generate_ed25519(&args),
KeyType::Dsa => generate_dsa(&args),
KeyType::X25519 => generate_x25519(&args),
};
let public = openssh_public.to_openssh().unwrap();
let private = openssh_private
.to_openssh(ssh_key::LineEnding::LF)
.unwrap()
.to_string();
let pub_file = format!("{}.public", args.name);
let priv_file = format!("{}.private", args.name);
if gen_pub {
fs::write(&pub_file, public).unwrap();
println!("created {pub_file}");
}
if gen_priv {
fs::write(&priv_file, private).unwrap();
println!("created {priv_file}");
}
}
|
