With our ongoing development of world-class commercial-grade cryptography solutions for the Espressif products, wolfSSL is proud to announce support for the ESP32-S3 Embedded Linux Kernel!
Our very own [gojimmypi] was able to get the wolfSSL wolfcrypt tests running successfully as an app on the embedded Linux environment thanks to the work of [jcmvbkbc] on linux-xtensa. For additional details on building the ESP32-S3 Linux kernel toolchain, see: https://gojimmypi.github.io/ESP32-S3-Linux/
Linux on the tiny and inexpensive ESP32-S3 is an exciting development that opens many more ideas of what is possible for embedded solutions.
If you’d like to build your own wolfSSL app for the ESP32-S3 Linux Kernel, here’s one possible configuration:
./configure \ --host=xtensa-esp32s3-linux-uclibcfdpic \ CC=xtensa-esp32s3-linux-uclibcfdpic-gcc \ AR=xtensa-esp32s3-linux-uclibcfdpic-ar \ STRIP=xtensa-esp32s3-linux-uclibcfdpic-strip \ RANLIB=xtensa-esp32s3-linux-uclibcfdpic-ranlib \ --prefix=/mnt/s3linux/build-xtensa-2023.02-fdpic-esp32s3/target/opt \ CFLAGS="-mfdpic -mforce-l32 -DNO_WRITEV -DWOLFSSL_USER_SETTINGS" \ "-DDEBUG_WOLFSSL -DTFM_NO_ASM -DALT_ECC_SIZE" \ --disable-filesystem --disable-shared --enable-psk
This new environment for wolfSSL also prompted addition of yet another test for the best tested cryptography: a read-only filesystem const pointer test in case you forget to compile with the proper read-only flash file system directives:
CFLAGS="-mfdpic -mforce-l32 …”
The first question many people ask: How fast is wolfSSL on an embedded Linux for the ESP32-S3? Initial findings show that the wolfSSL cipher computational benchmark performance is similar between the Linux app on the ESP32-S3 kernel and the ESP32-WROOM programmed with the ESP-IDF.
See some of our other recent prior blogs on Espressif news: