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Pauli 9b0e74c41a coverity 1462550 Resource leak
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/11651)
2020-04-30 20:21:16 +10:00
.github Add CIFuzz action 2020-03-05 17:34:11 +00:00
Configurations Configurations: Identify the shell variables around MANSUFFIX 2020-04-28 12:09:11 +02:00
VMS Following the license change, modify the boilerplates in last few 2018-12-06 15:40:33 +01:00
apps Amend references to "OpenSSL license" 2020-04-29 15:27:22 +02:00
boringssl@2070f8ad91 Update ossl_config.json for later BoringSSL commit 2017-03-14 12:12:13 +00:00
crypto coverity 1462550 Resource leak 2020-04-30 20:21:16 +10:00
demos Update copyright year 2020-04-23 13:55:52 +01:00
dev Fix dev/release-aux-openssl-announce-pre-release.tmpl 2020-04-25 04:02:10 +02:00
doc Undeprecate DH, DSA and RSA _bits() functions. 2020-04-30 14:51:37 +10:00
engines In OpenSSL builds, declare STACK for datatypes ... 2020-04-24 16:42:46 +02:00
external/perl Update the bundled external perl module Text-Template to version 1.56 2019-09-12 12:53:32 +02:00
fuzz fuzz/asn1.c: Add missing #include 2020-04-28 00:03:17 +02:00
include Undeprecate DH, DSA and RSA _bits() functions. 2020-04-30 14:51:37 +10:00
krb5@890ca2f401 Update the krb5 submodule 2019-12-25 12:45:32 -08:00
ms Unify all assembler file generators 2019-09-16 16:29:57 +02:00
os-dep Move Haiku configuration to separate config file to denote 2016-05-19 22:39:52 +02:00
providers Amend references to "OpenSSL license" 2020-04-29 15:27:22 +02:00
pyca-cryptography@09403100de Update the pyca-cryptography submodule 2018-09-10 12:04:03 +01:00
ssl Fix GOST curve sec bits 2020-04-28 11:40:18 +03:00
test coverity 1462577: Incorrect expression 2020-04-30 20:21:16 +10:00
tools Following the license change, modify the boilerplates in util/, tools/ 2018-12-06 14:17:23 +01:00
util Undeprecate DH, DSA and RSA _bits() functions. 2020-04-30 14:51:37 +10:00
.gitattributes Developer scripts: Release script 2020-04-21 10:11:41 +02:00
.gitignore Update some nits around the FIPS module 2020-04-24 13:19:16 +02:00
.gitmodules [extended tests] Enable krb5 tests in Travis 2017-04-18 19:10:25 +02:00
.travis-apt-pin.preferences Fix travis clang-3.9 builds 2017-06-23 17:57:02 +01:00
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.travis.yml travis: remove GENERATE=yes from some non no-deprecated builds 2020-04-25 21:39:55 +10:00
ACKNOWLEDGEMENTS.md doc: introduce some minimalistic markdown without essential changes 2020-02-26 21:04:38 +01:00
AUTHORS.md doc: introduce some minimalistic markdown without essential changes 2020-02-26 21:04:38 +01:00
CHANGES.md Undeprecate DH, DSA and RSA _bits() functions. 2020-04-30 14:51:37 +10:00
CONTRIBUTING.md Fix links in CONTRIBUTING.md 2020-04-27 16:35:39 +03:00
Configure Configure: change all references to INSTALL to INSTALL.md 2020-04-28 10:03:40 +02:00
FAQ.md doc: introduce some minimalistic markdown without essential changes 2020-02-26 21:04:38 +01:00
HACKING A very brief explanation of how to add custom functions to OpenSSL. 2019-07-08 20:09:13 +10:00
INSTALL.md Build files: add module installation targets 2020-04-19 23:36:51 +02:00
LICENSE Change license to the Apache License v2.0 2018-12-06 13:27:18 +01:00
NEWS.md Prepare for 3.0 alpha 2 2020-04-23 14:10:38 +01:00
NOTES.ANDROID Andoid cross compile: change ANDROID_NDK_HOME to ANDROID_NDK_ROOT 2020-03-14 04:26:56 +01:00
NOTES.DJGPP Remove unnecessary trailing whitespace 2019-02-05 16:25:11 +01:00
NOTES.PERL Fix typo in NOTES.PERL 2019-05-16 11:46:59 +10:00
NOTES.UNIX NOTES.UNIX: add "Linking your application" paragraph 2018-06-26 12:28:06 +02:00
NOTES.VALGRIND Replace util/shlib_wrap.sh with util/wrap.pl in diverse docs 2020-02-27 08:49:14 +01:00
NOTES.VMS Remove unnecessary trailing whitespace 2019-02-05 16:25:11 +01:00
NOTES.WIN Configure: final cleanup of asm related things 2019-06-17 16:08:53 +02:00
README.ENGINE Remove bsd_cryptodev engine 2017-06-19 09:31:45 -04:00
README.FIPS Remove more (rest?) of FIPS build stuff. 2016-01-06 12:07:26 -05:00
README.md Add a link to wiki 3.0 upgrade notes 2020-04-22 10:21:56 +01:00
SUPPORT.md doc: revamp the SUPPORT file 2020-02-26 21:06:17 +01:00
VERSION Prepare for 3.0 alpha 2 2020-04-23 14:10:38 +01:00
appveyor.yml Add a minimal build target for Travis and Appveyor 2020-02-11 13:22:39 +01:00
build.info Add better support for using deprecated symbols internally 2019-12-13 10:09:49 +01:00
config Update copyright year 2020-04-23 13:55:52 +01:00
config.com Following the license change, modify the boilerplates in last few 2018-12-06 15:40:33 +01:00
configdata.pm.in configdata.pm.in: Don't try to quotify undefined values 2019-12-04 00:19:40 +01:00
e_os.h Update copyright year 2020-04-23 13:55:52 +01:00


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Welcome to the OpenSSL Project

OpenSSL is a robust, commercial-grade, full-featured Open Source Toolkit for the Transport Layer Security (TLS) protocol formerly known as the Secure Sockets Layer (SSL) protocol. The protocol implementation is based on a full-strength general purpose cryptographic library, which can also be used stand-alone.

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.

Table of Contents


The OpenSSL toolkit includes:

  • libssl an implementation of all TLS protocol versions up to TLSv1.3 (RFC 8446).

  • 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 client and server tests
    • handling of S/MIME signed or encrypted mail
    • and more...


For Production Use

Source code tarballs of the official releases can be downloaded from www.openssl.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.

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 official OpenSSL Git Repository is located at git.openssl.org. There is a GitHub mirror of the repository 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 original OpenSSL repository using

    git clone git://git.openssl.org/openssl.git

or 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 OpenSSL repository openssl/openssl on GitHub and clone your public fork instead.

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

This is necessary, because all development of OpenSSL nowadays is done via GitHub pull requests. For more details, see Contributing.

Build and Install

After obtaining the Source, have a look at the INSTALL file for detailed instructions about building and installing OpenSSL. For some platforms, the installation instructions are amended by a platform specific document.

Specific notes on upgrading to OpenSSL 3.0 from previous versions, as well as known issues are available on the OpenSSL wiki.


Manual Pages

The manual pages for the master branch and all current stable releases are available online.


There is a Wiki at wiki.openssl.org which is currently not very active. It contains a lot of useful information, not all of which is up to date.


OpenSSL is licensed under the Apache License 2.0, which means that you are free to get and use it for commercial and non-commercial purposes as long as you fulfill its conditions.

See the LICENSE file for more details.


There are various ways to get in touch. The correct channel depends on your requirement. see the SUPPORT file for more details.


If you are interested and willing to contribute to the OpenSSL project, please take a look at the CONTRIBUTING file.

Since 2016, development takes place in public on the GitHub open source platform. The OpenSSL Project Pages at openssl.github.io are a valuable source of information if you want to get familiar with our development process on GitHub.


A number of nations restrict the use or export of cryptography. If you are potentially subject to such restrictions you should seek legal advice before attempting to develop or distribute cryptographic code.


Copyright (c) 1998-2020 The OpenSSL Project

Copyright (c) 1995-1998 Eric A. Young, Tim J. Hudson

All rights reserved.