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OpenSSL is a software library for applications that provide secure communications over computer networks against eavesdropping, and identify the party at the other end. It is widely used by Internet servers, including the majority of HTTPS websites. OpenSSL contains an open-source implementation of the SSL and TLS protocols.
Several versions of the TLS protocol exist. SSL 2.0 is a deprecated [27] protocol version with significant weaknesses. SSL 3.0 (1996) and TLS 1.0 (1999) are successors with two weaknesses in CBC-padding that were explained in 2001 by Serge Vaudenay. [28]
The tables below compare cryptography libraries that deal with cryptography algorithms and have application programming interface function calls to each of the supported features. Cryptography libraries
OpenSSL was available at the time, and was dual licensed under the OpenSSL License and the SSLeay license. [7] yaSSL, alternatively, was developed and dual-licensed under both a commercial license and the GPL. [8] yaSSL offered a more modern API, commercial style developer support and was complete with an OpenSSL compatibility layer. [4]
Some libraries support Rustls as one of several choices for TLS implementations. The reqwest HTTP client library offers the option to use Rustls for TLS instead of the system's default TLS library (for example, on Windows the default is the Security Support Provider Interface).
It runs on a variety of operating systems, [5] including most Unix-like operating systems and Windows. Stunnel relies on the OpenSSL library to implement the underlying TLS or SSL protocol. Stunnel uses public-key cryptography with X.509 digital certificates to secure the SSL connection, and clients can optionally be authenticated via a ...
LibreSSL is an open-source implementation of the Transport Layer Security (TLS) protocol. The implementation is named after Secure Sockets Layer (SSL), the deprecated predecessor of TLS, for which support was removed in release 2.3.0.
Botan is a BSD-licensed cryptographic and TLS library written in C++11.It provides a wide variety of cryptographic algorithms, formats, and protocols, e.g. SSL and TLS.It is used in the Monotone distributed revision control program, the OpenDNSSEC system, and ISC's Kea DHCP server among other projects.