openssl@3.6 for Mac

Welcome to the OpenSSL Project

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OpenSSL is a robust, commercial-grade, full-featured Open Source Toolkit for the Transport Layer Security (TLS, formerly SSL), Datagram TLS (DTLS), and QUIC protocols.

The protocol implementations are based on a full-strength general purpose cryptographic library, which can also be used stand-alone. Also included is a cryptographic module validated to conform with FIPS standards.

OpenSSL is descended from the SSLeay library developed by Eric A. Young and Tim J. Hudson.

The official Home Page of the OpenSSL Project is [www.openssl.org].

Overview Download Build and Install Documentation License Support Contributing Legalities

Overview

The OpenSSL toolkit includes: libssl an implementation of all TLS protocol versions up to TLSv1.3 ([RFC 8446]), DTLS protocol versions up to DTLSv1.3 ([RFC 9147]) and the QUIC version 1 protocol ([RFC 9000]). libcrypto a full-strength general purpose cryptographic library. It constitutes the basis of the TLS implementation, but can also be used independently. openssl the OpenSSL command line tool, a Swiss Army knife for cryptographic tasks, testing and analyzing. It can be used for creation of key parameters creation of X.509 certificates, CSRs and CRLs calculation of message digests encryption and decryption SSL/TLS/DTLS and client and server tests QUIC client tests handling of S/MIME signed or encrypted mail and more...

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For Production Use

Source code tarballs of the official releases can be downloaded from openssl-library.org/source/. The OpenSSL project does not distribute the toolkit in binary form.

However, for a large variety of operating systems precompiled versions of the OpenSSL toolkit are available. In particular, on Linux and other Unix operating systems, it is normally recommended to link against the precompiled shared libraries provided by the distributor or vendor.

We also maintain a list of third parties that produce OpenSSL binaries for various Operating Systems (including Windows) on the [Binaries] page on our wiki.

For Testing and Development

Although testing and development could in theory also be done using the source tarballs, having a local copy of the git repository with the entire project history gives you much more insight into the code base.

The main OpenSSL Git repository is private. There is a public GitHub mirror of it at [github.com/openssl/openssl], which is updated automatically from the former on every commit.

A local copy of the Git repository can be obtained by cloning it from the GitHub mirror using

git clone https://github.com/openssl/openssl.git

If you intend to contribute to OpenSSL, either to fix bugs or contribute new features, you need to fork the GitHub mirror and clone your public fork instead.

git clone https://github.com/yourname/openssl.git