Vitotp is a vim-based interactive wrapper around Chris Webb's totp
command-line tool (https://github.com/arachsys/totp.git).

This file (secrets.txt) is meant to hold the credentials for your
time-based one-time-passwords. But you can supplement any text to
your liking. Since it contains credentials, the file should always
be saved in encrypted form. Use the :X command to set the encryption
password. You can insert clipboard content by pressing the middle
mouse button in Vim's insert mode. The other way - copying text to
the clipboard - is deliberately blocked to prevent the accidental
leaking of secrets to the clipboard.

Each TOTP credential is written on a dedicated line. In the simplest
form, it consists only of the base32-encoded shared secret. It is
recommended to append a meaningful comment separated by space. This
comment will be reflected along the PIN in the TOTP output.

To calculate a time-based one-time password, put the cursor on the
line with the corresponding secret and press TAB. This will invoke
the totp tool with the current line as argument and present the
generated PIN below.

Note that the line can contain all arguments as supported by the
command-line tool. Examples, as taken from Chris' Webb's original
README:

  sha256:ABCDEFGHIJKLMNOPQRSTUVWXYZ234567:8 adam@acme.org
  765432ZYXWVUTSRQPONMLKJIHGFEDCBA brian@megacorp.com (current)
  765432ZYXWVUTSRQPONMLKJIHGFEDCBA:6:30:-30 brian@megacorp.com (next)

