Enter otpHEADmaster

Authenticator codes from the terminal, stdlib only, no phone and no
third-party dependency. Secrets are a private plain-text file, or the
output of a command so encrypted stores work unchanged.

1 files changed, 69 insertions, 0 deletions

diff --git a/tui.py b/tui.py
new file mode 100755
index 0000000..1f41dc9
--- /dev/null
+++ b/tui.py
@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+
+import curses
+import sys
+import time
+
+import otp
+
+BAR_WIDTH = 20
+
+
+def put(stdscr, row, text):
+    maxy, maxx = stdscr.getmaxyx()
+    if row >= maxy:
+        return
+    try:
+        stdscr.addstr(row, 0, text[: maxx - 1])
+    except curses.error:  # the terminal can shrink between getmaxyx and addstr
+        pass
+
+
+def draw(stdscr, entries, message=None):
+    stdscr.erase()
+    now = int(time.time())
+    width = max((len(name) for name, *_ in entries), default=0)
+    cwidth = max((digits for _, _, _, digits, _ in entries), default=0)
+    for row, (name, key, period, digits, digest) in enumerate(entries):
+        code = otp.hotp(key, now // period, digits, digest)
+        remaining = period - now % period
+        filled = remaining * BAR_WIDTH // period
+        bar = "#" * filled + "-" * (BAR_WIDTH - filled)
+        put(stdscr, row, f"{name:<{width}}  {code:>{cwidth}}  {remaining:2d}s [{bar}]")
+    put(stdscr, len(entries) + 1, message or "q quit  r reload")
+    stdscr.refresh()
+
+
+def run(stdscr, entries):
+    curses.curs_set(0)
+    stdscr.timeout(250)
+    message = None
+    while True:
+        draw(stdscr, entries, message)
+        ch = stdscr.getch()
+        if ch in (ord("q"), 27):
+            break
+        if ch == ord("r"):
+            curses.endwin()  # OTP_SECRETS_CMD may prompt on the terminal
+            try:
+                new_entries = otp.load_entries()
+            except otp.SecretsError as error:
+                message = f"reload failed: {error}"
+            else:
+                entries = new_entries
+                message = None
+
+
+def main():
+    try:
+        entries = otp.load_entries()
+        curses.wrapper(run, entries)
+    except otp.SecretsError as error:
+        print(f"tui: {error}", file=sys.stderr)
+        return error.status
+    except KeyboardInterrupt:
+        return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())