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// Copyright (c) 2016, 2018, 2022 Teddy Wing
//
// This file is licensed under the GNU GPLv3+. Please see the COPYING
// file for more information.
extern crate clipboard;
extern crate exitcode;
extern crate rustty;
use clipboard::ClipboardContext;
use rustty::{Terminal, Event, Cell, Color, Attr};
use rustty::ui::Painter;
use std::env;
use std::io::{self, BufRead};
use std::process::{self, Command};
use std::time::Duration;
struct Point {
x: usize,
y: usize,
}
/// Strips the part of a line before and including the first colon.
///
/// # Examples
///
/// ```
/// let value = strip_key("e: email@example.com");
/// assert_eq!(value, "email@example.com");
/// ```
fn strip_key(line: &str) -> String {
let strings: Vec<&str> = line.split(": ").collect();
strings[1..].join(": ")
}
fn move_selection(term: &mut Terminal, selection: &mut Point, style: Cell, y: usize) {
term.printline(selection.x, selection.y, " ");
selection.y = y;
term.printline_with_cell(selection.x, selection.y, "->", style);
}
/// Given a filename, either parse options from STDIN or send the file to
/// `pass show` and parse the result as options.
fn parse_options(filename: &str) -> Vec<String> {
fn push_option(options: &mut Vec<String>, line: String) {
if line.starts_with("e: ") ||
line.starts_with("u: ") ||
line.starts_with("p: ") {
options.push(line);
}
}
let mut options = Vec::new();
if filename == "-" {
let stdin = io::stdin();
for line in stdin.lock().lines() {
let line = line.expect("Error reading from STDIN");
push_option(&mut options, line.to_owned());
}
} else {
let mut child = Command::new("pass")
.arg("show")
.arg(filename)
.stdout(std::process::Stdio::piped())
.spawn()
.expect("Error executing `pass`");
child.wait().expect("Error waiting for `pass`");
let stdout = child.stdout.expect("No standard output");
let file = io::BufReader::new(stdout);
for line in file.lines() {
push_option(&mut options, line.expect("Error reading line"));
}
}
options
}
/// Checks whether the given line starts with "p: "
///
/// # Examples
///
/// ```
/// assert_eq!(is_password_line("p: secret"), true);
/// ```
fn is_password_line(line: &str) -> bool {
line.starts_with("p: ")
}
/// Replaces the password on a password line with "*"s.
///
/// # Examples
///
/// ```
/// assert_eq!(hide_password_line("p: secret"), "p: ******);
/// ```
fn hide_password_line(line: &str) -> String {
const KEY_LENGTH: usize = 3;
let password_length = line.len() - KEY_LENGTH;
format!("p: {}", "*".repeat(password_length))
}
fn main() {
let args: Vec<String> = env::args().collect();
let accepted_args = ["-i", "-V", "--version"];
match args.get(1) {
Some(arg) => {
if arg == "-V" || arg == "--version" {
println!("{}", env!("CARGO_PKG_VERSION"));
process::exit(exitcode::OK);
}
}
None => (),
}
let hide_password = match args.get(1) {
Some(arg) if arg == "-i" => true,
Some(_) => false,
None => false,
};
let last_arg = &args[args.len() - 1];
let input = if args.len() > 1 &&
!accepted_args.contains(&last_arg.as_ref()) {
last_arg
} else {
"-"
};
let copy_options = parse_options(input);
if copy_options.is_empty() {
process::exit(exitcode::NOINPUT);
}
let mut term = Terminal::new().unwrap();
term.swap_buffers().unwrap();
let knockout_cell = Cell::with_style(Color::White, Color::Black, Attr::Default);
let red_cell = Cell::with_style(Color::White, Color::Red, Attr::Default);
let green_cell = Cell::with_style(Color::White, Color::Green, Attr::Default);
let mut selection = Point { x: 0, y: 2 };
let mut clipboard_ctx = ClipboardContext::new().unwrap();
loop {
term.printline_with_cell(0, 0, "Passextract (Press q or Ctrl-C to quit)", knockout_cell);
term.printline_with_cell(selection.x, selection.y, "->", knockout_cell);
for (i, s) in copy_options.iter().enumerate() {
if hide_password && is_password_line(s) {
term.printline(5, i + 2, &hide_password_line(s))
} else {
term.printline(5, i + 2, s)
}
}
let evt = term.get_event(Duration::from_millis(100)).unwrap();
if let Some(Event::Key(ch)) = evt {
match ch {
'q' | '\x03' => {
// Clear the clipboard on quit
match clipboard_ctx.set_contents("".to_owned()) {
Ok(_) => break,
Err(_) => continue,
}
}
'j' => {
if selection.y < copy_options.len() + 1 {
let y = selection.y;
move_selection(&mut term, &mut selection, knockout_cell, y + 1)
}
}
'k' => {
if selection.y > 2 {
let y = selection.y;
move_selection(&mut term, &mut selection, knockout_cell, y - 1)
}
}
'g' => {
move_selection(&mut term, &mut selection, knockout_cell, 2)
}
'G' => {
move_selection(&mut term, &mut selection, knockout_cell, copy_options.len() + 1)
}
'\x0D' => {
match clipboard_ctx.set_contents(strip_key(©_options[selection.y - 2]).to_owned()) {
Ok(_) => {
term.printline_with_cell(selection.x, selection.y, "->", green_cell);
},
Err(_) => {
term.printline_with_cell(selection.x, selection.y, "->", red_cell);
}
}
}
_ => { continue }
}
}
term.swap_buffers().unwrap();
}
}
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