Project Summary
wolfSSL is a lightweight SSL/TLS implementation (up to TLS 1.2 and DTLS 1.2) for software developers building security functionality into their applications and devices. It is optimized for resource-constrained environments and can be up to 20x smaller than OpenSSL.
wolfSSL is ported to a long list of environments, including Win/Linux/Mac, Solaris, ThreadX, VxWorks, FreeBSD, NetBSD, OpenBSD, embedded Linux, WinCE, Haiku, OpenWRT, iOS, Android, Nintendo Wii and Gamecube through DevKitPro, QNX, MontaVista, OpenCL, NonStop, TRON/ITRON/µITRON, µC/OS, FreeRTOS, MQX, Nucleus, and more.
wolfSSL includes hardware cryptography support for several platforms including Intel AES-NI, Cavium NITROX, Microchip PIC32MZ, Freescale mmCAU/CAU, and Texas Instruments.
In a Nutshell, wolfSSL (formerly CyaSSL)...
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has a well established, mature codebase
maintained by a very large development team
with stable Y-O-Y commits -
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took an estimated 615 years of effort (COCOMO model)
starting with its first commit in February, 2011
ending with its most recent commit 1 day ago
Quick Reference
Commercial License
Permitted
Commercial Use
Forbidden
Required
These details are provided for information only. No information here is legal advice and should not be used as such.
GNU General Public License v2.0 or later
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Forbidden
Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
Did You Know...
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nearly 1 in 3 companies have no process for identifying, tracking, or remediating known open source vulnerabilities
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data presented on the Open Hub is available through our API
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use of OSS increased in 65% of companies in 2016
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30 Day SummaryAug 29 2025 — Sep 28 2025
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12 Month SummarySep 28 2024 — Sep 28 2025
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Static Analysis ( Generated by Coverity Scan for wolfSSL/wolfssl )
Repository URL: https://github.com/wolfSSL/wolfssl
Version: eda6c184bb1e16ca3e34ae40bca6f6b3bbeb72c2
- 2025-09-28
- Last Analyzed
- 706,056
- Lines of Code Analyze
- 0.1
- Defect Density
Defects by status for current build
- 2,108
- Total defects
- 68
- Outstanding
- 1,960
- Fixed