ctap/examples/hmac.rs

51 lines
1.8 KiB
Rust

extern crate ctap_hmac as ctap;
use crypto::digest::Digest;
use crypto::sha2::Sha256;
use ctap::extensions::hmac::HmacExtension;
use ctap::{FidoCredential, FidoCredentialRequestBuilder, AuthenticatorOptions};
use hex;
use std::env::args;
use std::io::prelude::*;
use std::io::stdin;
use std::io::stdout;
const RP_ID: &str = "ctap_demo";
fn main() -> ctap::FidoResult<()> {
let mut devices = ctap::get_devices()?;
let device_info = &mut devices.next().expect("No authenticator found");
let mut device = ctap::FidoDevice::new(device_info)?;
let mut credential = match args().skip(1).next().map(|h| FidoCredential {
id: hex::decode(&h).expect("Invalid credential"),
public_key: None,
}) {
Some(cred) => cred,
_ => {
let req = FidoCredentialRequestBuilder::default().rp_id(RP_ID).rp_name("ctap_hmac crate").user_name("example").uv(false).build().unwrap();
println!("Authorize using your device");
let cred = device.make_hmac_credential(req).expect("Failed to request credential");
println!("Credential: {}\nNote: You can pass this credential as first argument in order to reproduce results", hex::encode(&cred.id));
cred
}
};
let credential = credential;
print!("Type in your message: ");
stdout().flush();
let mut message = String::new();
stdin()
.read_line(&mut message)
.expect("Couldn't get your message\nNote: this demo does not accept binary data");
println!("Authorize using your device");
let mut salt = [0u8; 32];
let mut digest = Sha256::new();
digest.input(&message.as_bytes());
digest.result(&mut salt);
let (cred, (hash1, _hash2)) = device.get_hmac_assertion(RP_ID, &[&credential], &salt, None, None)?;
println!("Hash: {}", hex::encode(&hash1));
Ok(())
}