wolfSSL

wolfSSL
DeveloperTodd Ouska
Initial releaseFebruary 19, 2006 (2006-02-19)
Stable release
5.8.4  / 20 November 2025
Written inC
Operating systemMulti-platform
TypeCryptography library
LicenseGPL-3.0-or-later or proprietary
Websitewww.wolfssl.com
Repositorygithub.com/wolfssl/wolfssl

wolfSSL is a small, portable, embedded SSL/TLS library targeted for use by embedded systems developers. It is an open source implementation of TLS (SSL 3.0, TLS 1.0, 1.1, 1.2, 1.3, and DTLS 1.0, 1.2, and 1.3) written in the C programming language. It includes SSL/TLS client libraries and an SSL/TLS server implementation as well as support for multiple APIs, including those defined by SSL and TLS. wolfSSL also includes an OpenSSL compatibility interface with the most commonly used OpenSSL functions.