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use log::debug;
use once_cell::sync::Lazy;
use sha2::{Digest, Sha256};
use std::{
io::{self, Write},
str,
sync::Mutex,
};
use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, StandardStreamLock, WriteColor};
use x509_parser::parse_x509_certificate;
use yubikey::{certificate::Certificate, piv::*, YubiKey};
#[macro_export]
macro_rules! status_ok {
($status:expr, $msg:expr) => {
$crate::terminal::Status::new()
.justified()
.bold()
.color(termcolor::Color::Green)
.status($status)
.print_stdout($msg);
};
($status:expr, $fmt:expr, $($arg:tt)+) => {
$crate::status_ok!($status, format!($fmt, $($arg)+));
};
}
#[macro_export]
macro_rules! status_warn {
($msg:expr) => {
$crate::terminal::Status::new()
.bold()
.color(termcolor::Color::Yellow)
.status("warning:")
.print_stdout($msg);
};
($fmt:expr, $($arg:tt)+) => {
$crate::status_warn!(format!($fmt, $($arg)+));
};
}
#[macro_export]
macro_rules! status_err {
($msg:expr) => {
$crate::terminal::Status::new()
.bold()
.color(termcolor::Color::Red)
.status("error:")
.print_stderr($msg);
};
($fmt:expr, $($arg:tt)+) => {
$crate::status_err!(format!($fmt, $($arg)+));
};
}
static COLOR_CHOICE: Lazy<Mutex<Option<ColorChoice>>> = Lazy::new(|| Mutex::new(None));
pub static STDOUT: Lazy<StandardStream> = Lazy::new(|| StandardStream::stdout(get_color_choice()));
pub static STDERR: Lazy<StandardStream> = Lazy::new(|| StandardStream::stderr(get_color_choice()));
fn get_color_choice() -> ColorChoice {
let choice = COLOR_CHOICE.lock().unwrap();
*choice
.as_ref()
.expect("terminal stream accessed before initialized!")
}
pub(super) fn set_color_choice(color_choice: ColorChoice) {
let mut choice = COLOR_CHOICE.lock().unwrap();
assert!(choice.is_none(), "terminal colors already configured!");
*choice = Some(color_choice);
}
#[derive(Clone, Debug, Default)]
pub struct Status {
justified: bool,
bold: bool,
color: Option<Color>,
status: Option<String>,
}
impl Status {
pub fn new() -> Self {
Self::default()
}
pub fn justified(mut self) -> Self {
self.justified = true;
self
}
pub fn bold(mut self) -> Self {
self.bold = true;
self
}
pub fn color(mut self, c: Color) -> Self {
self.color = Some(c);
self
}
pub fn status<S>(mut self, msg: S) -> Self
where
S: ToString,
{
self.status = Some(msg.to_string());
self
}
pub fn print_stdout(self, msg: impl AsRef<str>) {
self.print(&STDOUT, msg).expect("error printing to stdout!")
}
pub fn print_stderr(self, msg: impl AsRef<str>) {
self.print(&STDERR, msg).expect("error printing to stderr!")
}
fn print(self, stream: &StandardStream, msg: impl AsRef<str>) -> io::Result<()> {
let mut s = stream.lock();
s.reset()?;
s.set_color(ColorSpec::new().set_fg(self.color).set_bold(self.bold))?;
if let Some(status) = self.status {
if self.justified {
write!(s, "{:>12}", status)?;
} else {
write!(s, "{}", status)?;
}
}
s.reset()?;
writeln!(s, " {}", msg.as_ref())?;
s.flush()?;
Ok(())
}
}
pub fn print_cert_info(
yubikey: &mut YubiKey,
slot: SlotId,
stream: &mut StandardStreamLock<'_>,
) -> io::Result<()> {
let cert = match Certificate::read(yubikey, slot) {
Ok(c) => c,
Err(e) => {
debug!("error reading certificate in slot {:?}: {}", slot, e);
return Ok(());
}
};
let buf = cert.into_buffer();
if !buf.is_empty() {
let fingerprint = Sha256::digest(&buf);
let slot_id: u8 = slot.into();
print_cert_attr(stream, "Slot", format!("{:x}", slot_id))?;
match parse_x509_certificate(&buf) {
Ok((_rem, cert)) => {
print_cert_attr(
stream,
"Algorithm",
cert.tbs_certificate.subject_pki.algorithm.algorithm,
)?;
print_cert_attr(stream, "Subject", cert.tbs_certificate.subject)?;
print_cert_attr(stream, "Issuer", cert.tbs_certificate.issuer)?;
print_cert_attr(
stream,
"Fingerprint",
&hex::upper::encode_string(&fingerprint),
)?;
print_cert_attr(
stream,
"Not Before",
cert.tbs_certificate
.validity
.not_before
.to_rfc2822()
.unwrap(),
)?;
print_cert_attr(
stream,
"Not After",
cert.tbs_certificate
.validity
.not_after
.to_rfc2822()
.unwrap(),
)?;
}
_ => {
println!("Failed to parse certificate");
return Ok(());
}
};
}
Ok(())
}
fn print_cert_attr(
stream: &mut StandardStreamLock<'_>,
name: &str,
value: impl ToString,
) -> io::Result<()> {
stream.set_color(ColorSpec::new().set_bold(true))?;
write!(stream, "{:>12}:", name)?;
stream.reset()?;
writeln!(stream, " {}", value.to_string())?;
stream.flush()?;
Ok(())
}