Add support for wolfSSL Managed Components

[gojimmypi]

Related to the recent update of wolfSSL published for https://github.com/wolfSSL/wolfssh/pull/699, this PR adds Apple HomeKit support for wolfSSL as a Managed Component and removes the static local copy.

For details on wolfSSL Managed Components, see these blogs:

• https://www.wolfssl.com/wolfssl-now-available-in-espressif-component-registry/
• https://www.wolfssl.com/wolfmqtt-now-available-as-an-espressif-managed-component-includes-aws-iot-mqtt-example/
• https://www.wolfssl.com/wolfssh-now-available-as-an-espressif-managed-component-includes-ssh-echo-server-example/

As the SRP issue in https://github.com/wolfSSL/wolfssl/issues/7210 was addressed after the release of wolfSSL 5.7.0 in https://github.com/wolfSSL/wolfssl/pull/7505, this PR includes a link to pre-release version 5.7.1-preview2e or later to work properly.

See the respective LED example README for addition details. This section was added:

Requirements

This project uses the wolfSSL Managed Component. Version 5.7.1-Preview2e or later must be used.

See: https://components.espressif.com/components/wolfssl/wolfssl/versions/5.7.1-preview2e

Currently, a preview release is available, and can be installed like this:

idf.py add-dependency "wolfssl/wolfssl^5.7.1-preview2e"

To enable support for Apple HomeKit, be sure to check the respective box in idf.py menuconfig.

The local sdkconfig.defaults has been edited to enable the wolfSSL support for Apple HomeKit by default.

[gojimmypi]

@AchimPieters let me know if any problems are encountered. We can meet on discord or zoom to resolve any issues.

[AchimPieters]

FAILED: esp-idf/esptool_py/CMakeFiles/app_check_size /project/examples/led/build/esp-idf/esptool_py/CMakeFiles/app_check_size cd /project/examples/led/build/esp-idf/esptool_py && /opt/esp/python_env/idf5.4_py3.10_env/bin/python /opt/esp/idf/components/partition_table/check_sizes.py --offset 0x8000 partition --type app /project/examples/led/build/partition_table/partition-table.bin /project/examples/led/build/main.bin Error: app partition is too small for binary main.bin size 0x101d90:

• Part 'factory' 0/0 @ 0x10000 size 0x100000 (overflow 0x1d90) ninja: build stopped: subcommand failed. ninja failed with exit code 1, output of the command is in the /project/examples/led/build/log/idf_py_stderr_output_7911 and /project/examples/led/build/log/idf_py_stdout_output_7911

It seems it's getting "big"?

[gojimmypi]

Hi @AchimPieters your device a 2MB ESP32? There are options in wolfSSL user_settings.h that can reduce code size. Let me revisit the settings you were using. Stand by...

Edit: ok, I see that the hardware acceleration was turned off by default. Even with hardware acceleration, the software code still needs to be present for fallback (e.g. when hardware busy). Disabling all hardware acceleration saves about 8K of memory.

I'm preparing a new PR with more Kconfig settings to allow for a smaller footprint on devices with limited flash.