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Open Source Cryptographic Libraries

Products which are available under some form of Open Source license, and which may also be available under some form of commercial license.

Open Source Cryptographic Libraries

Library	Description
AmiSSL	an OpenSSL port to AmigaOS
Botan	a C++ cryptography library which includes a TLS implementation
BoringSSL	a Google fork of OpenSSL (Announcement ) (Press coverage: ycombinator, Ars Technica, PC World, ZDNet )
Bouncy Castle	cryptography API for Java and C# (Wikipedia: Bouncy Castle (cryptography))
Cryptlib	a security toolkit that allows one to easily add encryption and authentication services to software
Crypto++	a free C++ class library of cryptographic schemes
GnuTLS	an LGPL-licensed TLS library with substantial documentation
LibreSSL	an OpenBSD fork of OpenSSL (Press coverage: ZDNet, Ars Technica)
LibTomCrypt	public domain open source crypto library written in C
libtlssep	A simplified TLS library based on OpenSSL that decomposes socket operations from private key operations by providing two processes
mbed TLS	an TLS library that handles the complexities of the Secure Sockets Layer (SSL) protocol for applications (formerly PolarSSL)
miTLS	a verified reference implementation of the TLS protocol. ("reddit: miTLS - A verified reference TLS implementation")
NaCl	NaCl (pronounced "salt") is a easy-to-use high-speed software library for network communication, encryption, decryption, and signatures
NSS	a set of libraries designed to support cross-platform development of security-enabled client and server applications
s2n	Amazon's open source implementation of the TLS/SSL protocols.
XySSL	a C library providing a very small footprint crypto library and SSL implementation.

Open Source Products Using OpenSSL

Products which are available under some form of Open Source License, and which may also be available under some form of commercial license.

Open Source Products Using OpenSSL

Product	Description
libevent	an event driven library which can optionally use OpenSSL
mod_ssl	SSL/TLS module for the Apache HTTP Server
Stunnel	an SSL encryption wrapper between remote client and local (inetd-startable) or remote server

Languages libraries/Wrappers relying on openssl

• libcurl http://curl.haxx.se/ which can use openssl
• PHP uses libcurl http://php.net/manual/en/intro.curl.php
• Python pyOpenSSL https://github.com/pyca/pyopenssl cryptography https://github.com/pyca/cryptography
• Perl Perl-Openssl http://sourceforge.net/projects/perl-openssl/

Closed Source Cryptographic Libraries

Closed Source Cryptographic Libraries

Library	Description
No Entry	This is a placeholder

Closed Source Products Using OpenSSL

Closed Source Products Using OpenSSL

Product	Description
Stonesoft Firewall Appliances [1]	Stonesoft (now McAfee) Appliances uses openssl as SSL/TLS communication library, license advertised [2]
No Entry	This is a placeholder

Even if this section is empty now, it exist a numerous number of closed source products using OpenSSL.

Books and Documentation

Books and Documentation

Title	Description
Comparison of TLS implementations	Wikipedia article comparing various TLS libraries
keylength.com	site which summarizes various key length recommendations
OpenSSL Cookbook	A free ebook that covers configuration and command-line usage (first published in 2013; continuously updated)
Network Security with OpenSSL	O'Reilly book from 2002

Testing Resources

Testing Resources

Title	Description
TLS-O-MATIC	A set of tests for TLS clients
SSL Labs server test	Probes any HTTPS server on the Internet and assigns it a letter grade
SSL Labs client test	Tests the TLS capabilities of your browser
TLSPretense	A test framework for testing SSL/TLS client certificate validation
sni.velox.ch	Test for Server Name Indication