wolfSSL recently released version 4.0.0 of the wolfSSL embedded SSL/TLS library with a litany of port additions. One of these new ports is added functionality for Cypress’s WICED Studio SDK! WICED Studio is an SDK targeting IoT devices, offering both Bluetooth and WI-Fi (IEEE 802.11) development platforms. WICED SDK offers code examples and tools for embedded development boards including Adafruit Feather boards which, is a great alternative to Arduino for student boards. The code examples demonstrate the use of wolfCrypt and integrate wolfSSL functionality into the WICED platform. A TLS client and server was added using the wolfSSL library, as well as, an HTTPS client example. wolfSSL supplies a client and server for testing purposes, the HTTPS client example also runs against the wolfSSL example server as well as www.example.com for demonstration purposes.

wolfSSL is a highly configurable option to accompany WICED software allowing manual configuration options affecting functionality and build size. The examples provided serve as a starting point for any embedded project and works with TLS versions 1.0, 1.1, 1.2, and 1.3; they are built on the ThreadX RTOS using NetX Duo for the TCP/IP stack.

wolfSSL v4.0.0.0 can be downloaded from the wolfSSL download page, or from the GitHub repository here: https://github.com/wolfssl/wolfssl.git.

Supported functionality and features:

wolfCrypt test suite and benchmark test wolfSSL TLS client and server wolfSSL HTTPS client NetX Duo TCP/IP stack for embedded systems ThreadX RTOS for embedded platforms Server Name Indication (SNI) extension Maximum fragment length extension Truncated HMAC TLS versions 1.0, 1.1, 1.2, and 1.3 Certificate verification Certificate chain loading RSA and ECC certificates Multithread capability Session resumption

Cipher suites supported out of the box:

ECDHE-ECDSA-AES128-GCM-SHA256
ECDHE-ECDSA-AES128-SHA
ECDHE-ECDSA-AES256-GCM-SHA384
ECDHE-ECDSA-AES256-SHA384
ECDHE-ECDSA-CHACHA20-POLY1305
ECDHE-RSA-AES128-GCM-SHA256
ECDHE-RSA-AES128-SHA
ECDHE-RSA-AES256-GCM-SHA384
ECDHE-RSA-AES256-SHA
ECDHE-RSA-CHACHA20-POLY1305
AES128-GCM-SHA256
AES256-SHA256
AES256-GCM-SHA384
AES128-SHA

Cipher suites supported for TLS 1.3 out of the box:

TLS13-AES128-GCM-SHA256
TLS13-AES256-GCM-SHA384
TLS13-CHACHA20-POLY1305-SHA256
TLS13-AES128-CCM-SHA256