This is an unpolished TOTP app for wasp-os. It currently provides SHA-1 based One-Time-Passwords with a cycle of 30 seconds. It requires a lot of memory so you may want to remove as many apps as possible before compiling.
The app requires a file named totp.csv in your root directory. An example file is included in this archive. The file is formatted simply. An account handle (should be short) followed by a semicolon and the TOTP secret.
ACCOUNT;SECRETSECRETSECRET
Run the makesecret.py to create a TOTP key with very light encryption (CAESAR). If you do not wish to apply the CAESAR cipher, just add your secret to the totp.csv file and your pin will be 0000.
You may also apply the CAESAR cipher manually if you prefer that. Just write down your secret string and write your repeated PIN below. Then increment the letters based on the number written below them.
Example:
MYSECRET
34563456
PCXKFVJZ
Unzip the current release inside the wasp-os source root directory and add the following to wasp/boards/manifest_240x240.py:
'apps/totpgenapp.py',
'totp/__init__.py',
'totp/sha1.py',
'totp/base32.py',
Refer to the official build guide for the remaining steps.
You will likely run into compilation errors if you have many other apps frozen into the image. Remove unneeded apps from the manifest file in this case.
Extract the archive to the wasp-os source directory and run make sim.
The generated codes will be wrong in the simulator: Calculatiion of the UNIX time is adjusted for the Colmi P8 (and most probably for the Pinetime as well) that uses a different epoch than the default. If you want to run it in the simulator properly, change the drawotp() function (see comments there).
When the app starts, it will ask for a pin. If you did not apply the CAESAR cipher to your secret then you can leave it at 0000.
If everything works, you will now see the account name, the current TOTP and the expiry time in seconds.
Swipe up/down to see other accounts.
Swipe left/right to lock the app.
Press the button to sleep and lock the app.
