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wolfCrypt FIPS Module

The CMVP has issued FIPS 140-2 Certificate #2425 for the wolfCrypt Module developed by wolfSSL Inc.

wolfSSL is a lightweight C-language-based SSL/TLS library targeted for embedded, RTOS, or resource-constrained environments primarily because of its small size, speed, and portability.  wolfSSL supports industry standards up to the current TLS 1.2 and DTLS 1.2 levels, is up to 20 times smaller than OpenSSL, offers a simple API, an OpenSSL compatibility layer, OCSP and CRL, and offers several progressive ciphers. wolfSSL is under active development, and should be chosen over yaSSL when possible.

wolfSSL provides lightweight, portable security solutions with a focus on speed and size.  If you are looking for an SSL library or web server offering optimal speeds while keeping the footprint size at a minimum, look no further.  Dual licensed to cater to a diversity of users ranging from the hobbyist to the commercial customer, we are happy to help you in any way we can.  Our products are open source, giving users the freedom to inspect our codebase first hand. For inquiries, questions, or comments, please Contact Us, or call us direct at +1 425 245 8247.

To read about some of the areas that wolfSSL products are being used, please see our Case Studies page. If you unsure which product best fits your needs, please read Choosing the Correct yaSSL Technology or contact us for guidance.

yaSSL is a C++ based SSL library for embedded and RTOS environments targeted at individuals who prefer to use the C++ language.  yaSSL supports industry standards up to TLS 1.1, and also includes an OpenSSL compatibility interface. CyaSSL should be chosen over yaSSL when possible.

SSL / TLS Libraries


wolfSSL 3.7.0

Release 3.7.0 adds ALPN extension, IDEA cipher, throughput benchmarking, sniffer improvements, user RSA crypto plugin abstraction, Rowley CrossWorks support, and more.

The wolfCrypt embedded cryptography engine is a lightweight cryptography library targeted for embedded, RTOS, and resource constrained environments primarily because of its small size, speed, and portability.  wolfCrypt supports the most popular algorithms and ciphers as well as progressive ones such as HC-128, RABBIT, NTRU, and SHA-3.  wolfCrypt is stable, production-ready, and backed by an excellent support team.

Crypto Engines

For Java applications that wish to leverage the industry-leading wolfSSL SSL/TLS implementation for secure communication, this JNI wrapper provides an interface to give those applications support for the current SSL/TLS standards up to TLS 1.2 and DTLS 1.2.


Questions? +1 (425) 245-8247

The wolfMQTT library is a client implementation of the MQTT written in C for embedded use. It supports SSL/TLS via the wolfSSL library. It was built from the ground up to be multi-platform, space conscience and extensible. It supports all Packet Types, all Quality of Service (QoS) levels 0-2 and supports SSL/TLS using the wolfSSL library. This implementation is based on the MQTT v3.1.1 specification.

MQTT Libraries