Fixes a division by zero bug caused by calling getCodeFromTimestamp
without having initialized the TOTP library with a secret first.
This was happening because the face calls totp_display on activation,
meaning the validity of the secret was not checked since this is
done in the generate function.
Now the validity of the key is determined solely by the size
of the current decoded key. A general display function checks it
and decides whether to display the code or just the error message.
The size of the current decoded key is initialized to zero
on watch face activation, ensuring fail safe operation.
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: madhogs <59648482+madhogs@users.noreply.github.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/385
Forgot to call watch_display_string on the error message.
Of course the message isn't going to be displayed.
Also, increase the buffer size to 10 characters
and output a space to the last position.
This ensures the segments are cleared.
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: madhogs <59648482+madhogs@users.noreply.github.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/385
Allocate an unlimited extent 128 byte buffer once during setup
instead of allocating and deallocating repeatedly. A static buffer
was not used because it fails to be reentrant and prevents multiple
instances of the watch face to be compiled by the user.
The advantage is the complete prevention of memory management errors,
improving the reliability of the watch. It also eliminates the overhead
of the memory allocator itself since malloc is not free.
The disadvantage is a worst case default size of 128 bytes was required,
meaning about 90 bytes will be wasted in the common case since most keys
are not that big. This can be overridden by the user via preprocessor.
The key lengths are checked on TOTP watch face initialization
and if any key is found to be too large to fit the buffer
it is turned off and the label and ERROR is displayed instead.
The base32 encoded secrets are decoded dynamically to the buffer
at the following times:
- Face enters the foreground
- User switches TOTP code
Therefore, there is still some extra runtime overhead
that can still be eliminated by code generation.
This will be addressed in future commits.
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: madhogs <59648482+madhogs@users.noreply.github.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/385
The TOTP face is working in the simulator but fails on the real hardware
when loaded with lots of codes, just like the LFS version.
This is likely caused by the recent refactoring of the TOTP face
which introduced a declarative credential interface for ease of use.
That's accomplished by decoding the secrets at runtime which increases
the RAM requirements. Users are likely hitting memory limits.
In order to mitigate this, the algorithm is changed from decoding
all of the secrets only once during initialization to on the fly
decoding of the secret for the current TOTP credential only.
This converts this face's dynamic memory usage from O(N) to O(1)
at the cost of memory management when switching faces and credentials
which could impact power consumption. Issue is confirmed fixed by
author of issue who has tested it on real hardware. Fixes#384.
Due to variable key sizes, the memory cannot be statically allocated.
Perhaps there's a maximum key size that can serve as worst case?
Also took this opportunity to restructure the code a bit.
Also added code to check for memory allocation failure.
Reported-by: madhogs <59648482+madhogs@users.noreply.github.com>
Fixed-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: madhogs <59648482+madhogs@users.noreply.github.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Issue: https://github.com/joeycastillo/Sensor-Watch/issues/384
Aggregates the TOTP credentials into a data structure,
making it easier to define and use the credentials.
Also incorporate backwards movement code from another branch.
Co-authored-by: Max Zettlmeißl <max@zettlmeissl.de>
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/369
GitHub-Related-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/356
Implements an advanced pulsometer that can be calibrated by the user.
Also features a streamlined and responsive user interface,
new documentation and generally improved code.
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/371
Makes a long press of the ALARM button reset the face to current day.
Reviewed-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-by: Wesley Aptekar-Cassels <me@wesleyac.com>
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/316
Avoid resetting it to zero when the face is activated.
Initialize the variables once when the face is first set up.
This makes it remember the last measurement taken by the user.
It will no longer be overwritten when the watch face activates.
Avoid resetting it to default when the face is activated.
Set the default pulsometer calibration once,
only when the face is first set up.
This makes it remember the calibration set by the user.
It will no longer overwrite it.
Update the copyrights to include full name attribution
to Max Zettlmeißl whose code I've incorporated and who
has explicitly licensed it as MIT.
Max Zettlmeißl (@maxz) commented on 2024-01-20:
> I provide all my changes under the MIT license
GitHub-Comment: https://github.com/joeycastillo/Sensor-Watch/pull/356#issuecomment-1902114306
Adds the ability to cycle back to the previous credential with LIGHT.
Long pressing LIGHT activates the LED.
Co-authored-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
This allows the user to easily copy the base32 encoded secrets
into the TOTP record initializers. They will be decoded once
at runtime when the face is being set up by the movement framework.
Also rename the array of TOTP records to credentials. Much better.
Instances of the pulsometer state structure are only passed
to the pulsometer itself and only via the opaque context pointer.
No other code uses it. There is no need to expose it in a header file
so make it an implementation detail of the watch face.
Update the copyrights to include full name attribution to all
who contributed to the pulsometer watch face, including myself.
Also add an SPDX license identifier header comment to the files.
Implements an advanced pulsometer that can be recalibrated by the user.
The main clock face now displays the measured pulses per minute.
The day of month digits now display the pulsometer calibration.
The light button now cycles through integer graduations
which now range from 1 to 39 pulses per minute.
Long presses of the light button cycle by 10 instead of 1.
The watch face's responsiveness to input has been carefully optimized.
The code has been reorganized and generally improved.
Update the copyrights to include full name attribution
to all who contributed to this watch face, including myself.
Also add an SPDX license identifier header comment to the files.
https://spdx.org/licenses/MIT.html
Using the new structured TOTP record data structure
allows the TOTP watch face to statically and implicitly
compute the total number of defined TOTP records.
Users can now simply add new keys and records in the designated area
and the watch face will compile and automatically use them with no need
to maintain a separate array size variable. Less chance of mistakes.
* Move from .c to .h as needed for consistency.
* When missing from both, copy from pull request or wiki.
* When missing entirely, infer functionality from source code.
This allows the alarm button to be held down in the date settings and
quickly cycle through the dates instead of having to push for each
single increment like in other faces.
