We’ve fully added support for SHA-3 to the wolfSSL embedded TLS library. We have also included SHA-3 support to HMAC and HKDF. Our SHA-3 offering includes 224, 256, 384, and 512-bit digests. It is tied into our hashing and signature infrastructure, so it will be available to TLS v1.2 or TLS v1.3 when the IETF adds cipher suites using SHA-3. There are also two build flavors to trade between size and speed, good for large server environments and for small embedded applications. If you are a FIPS user, we shall have SHA-3 available inside of our FIPS boundary later this year.
For more information please email us at firstname.lastname@example.org.