Open SSL
Cryptography and SSL/TLS Toolkit
Welcome to OpenSSL!
OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. It is also a general-purpose cryptography library. For more information about the team and community around the project, or to start making your own contributions, start with the community page. To get the latest news, download the source, and so on, please see the sidebar or the buttons at the top of every page.
OpenSSL is licensed under an Apache-style license, which basically means that you are free to get and use it for commercial and non-commercial purposes subject to some simple license conditions.
For a list of vulnerabilities, and the releases in which they were found and fixes, see our Vulnerabilities page.
Latest News
| Date | Item |
| 13-Sep-2021 | New Blog post: Old Let’s Encrypt Root Certificate Expiration and OpenSSL 1.0.2 |
| 07-Sep-2021 | Final version of OpenSSL 3.0.0 is now available: please download and upgrade! |
| 24-Aug-2021 | Security Advisory: two security fixes |
| 24-Aug-2021 | OpenSSL 1.1.1l is now available, including bug and security fixes |
| 29-Jul-2021 | Beta 2 of OpenSSL 3.0 is now available. This is a release candidate: please download and test it |
| More. |
Legalities
Please remember that export/import and/or use of strong cryptography software, providing cryptography hooks, or even just communicating technical details about cryptography software is illegal in some parts of the world. So when you import this package to your country, re-distribute it from there or even just email technical suggestions or even source patches to the authors or other people you are strongly advised to pay close attention to any laws or regulations which apply to you. The authors of OpenSSL are not liable for any violations you make here. So be careful, it is your responsibility.
Please report problems with this website to webmaster at openssl.org.
Copyright © 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
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Installing OpenSSL library on macOS Catalina
Yaşar Yücel Yeşilbağ
Sep 18, 2020 · 4 min read
Whether you are building apps for just macOS or for cross-platform, if your app is using OpenSSL for crypto-works, you will have to install OpenSSL library since macOS ships with LibreSSL. Furthermore, cross-platform cryptography in .Net Core and .Net 5 uses OpenSSL on macOS.
Installing OpenSSL library on macOS seems easy at first, but in practice can be a real pain in the back. Here is my journey of installing OpenSSL 1.1.1g on macOS Catalina (10.15.6) and making it reachable by my .Net Core apps. I tried to write complete and generalized instructions to be as applicable to more systems as possible. And I also avoided symbolic linking (ln -s) and install_name_tool, since for me those are last options.
Installing OpenSSL
First, open a terminal, and see if OpenSSL is already installed:
If it’s not installed, you’ll see “Not installed” among the first few lines of output. Or may be it’s not the latest version. So, install or update if necessary:
Check if the system sees the library directly:
This command prints the SSL library which exists first in the PATH environment variable, being LibreSSL or OpenSSL at some version. OpenSSL doesn’t need being here to be reachable. But if you want this for some reason, follow the instructions below, otherwise jump to the Making OpenSSL Reachable section.
Run the command “brew info openssl” again:
Since OpenSSL is keg-only [1], it has to be referred from an environment variable, which is done by the printed instruction, which is the echo ‘export… line in the red rectangle at above screenshot. It may be a bit different in your system, it’s because it depends on its version. Copy/paste/run that line, so that necessary command will be written to .profile file [2].
To see what is written to .profile file, if you wonder, run below command at home directory:
Manually run the .profile file to eliminate logoff & logon at this time:
Check if system sees it now:
It should now print the up-to-date OpenSSL.
Making OpenSSL Reachable
When an app wants to use a library, macOS searches several locations to find it. We have to find library path of OpenSSL and add it to DYLD_LIBRARY_PATH environment variable. For this purpose, run “brew info openssl” command again.
The path in the red rectangle at above screenshot is the path where OpenSSL is installed. To have the library path we’re looking for, just append /lib to it. We want this library path to be added to aforementioned environment variable at every user logon. And we’ll use below command for this, just replace the …/lib path with the one you have.
Manually run the .profile file [2] to eliminate logoff & logon at this time:
This should do the trick normally. But I’ve read that on some systems apps still cannot find OpenSSL library. So, try running your OpenSSL app. If the app gives an error like “No usable version of libssl was found. Abort trap: 6” or “PlatformNotSupportedException”, you may have to install or update libssh2. I didn’t need it but here it is:
Since libssh2 is not keg-only [1], it will be readily accessible without adding it to any environment variable.
That’s it! Now OpenSSL library should be reachable from any app. At least that’s the common hope 😊 This was not the funniest thing I did so far, but it was necessary. And I wrote it down here to be a reference for everyone.
I wish you installations funnier than this one 😁 Now I need some beer 🍺
Note [1]: For a software via brew to be “keg-only” means it is installed in /usr/local/Cellar but not linked into places like /usr/local/bin, /usr/local/lib. This means most tools will not find it.
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Question: Q: install openssl
Is there a step by step process to install latest version of openssl. I am using OS 10.8.5 on a Mac Mini, current version is OpenSSL 0.9.8y 5 Feb 2013.
This is not a server version.
Posted on Jun 19, 2014 7:32 AM
Thank you Illaass.
The Top Link had helped me. After getting it to install I did not have Path correctly. I was able to get to work on MacBook Pro but need to install xcode for make command on MacMini to try and repeat the process. Don’t know if there is an easier way to get command line tools though.
Posted on Jun 19, 2014 9:34 AM
Helpful answers
The Mac topic in:
Jun 19, 2014 8:12 AM
There are I believe three different ways to get the xcode command line tools installed.
- Download and install the full XCode package either from the App store (free) or from the Apple Developer portal (requires developer account), then in XCode tell it to download and install the command line tools
- Download only the command line tools installer from the Apple Developer portal (requires developer account)
- Trigger an automated install in Terminal
I am not sure why you are installing a (newer) version of OpenSSL on a Mac. If this is with regards to the recent HeartBleed security problem then no Mac has ever had a version that is vulnerable to this issue. Ironically in this case it is precisely because the version Apple includes is out-of-date that it does not have this problem.
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OpenSSL for Mac
OpenSSL 3.0.0 LATEST
OpenSSL for Mac 2021 full offline installer setup for Mac
TLS and SSL cryptographic protocols can be implemented into your projects using the OpenSSL for Mac tool. This is basically an open source library which is compatible with several operating systems for securing data that you transfer online.
Internet Data Transfer Security
SSL and TSL protocols are commonly utilized for securing online communications. They do this using authentication keys and data encryption which keep important messages confidential.
The software gives you a reliable method for generating security keys and encrypting data. That way, sensitive information can be transferred safely online. The “C” language was used to develop the main library. There is even a command line tool which can give you access to each cipher and algorithm that is available.
Multiple Encryption Algorithms Supported
There are several encryption algorithms supported by this tool. The console can be used to generate personal certificates and keys with AES, DES, SHA-1, or MD5. Cryptography algorithms which use public keys are also supported by the library, including DSA and RSA.
Documentation is not included with the download package. However, there are numerous online resources available which explain how to implement algorithms. Since it is an open source community, you can contribute your own material to it as well.
The console is where the tools are used in this package. An inexperienced user who is only familiar with graphical interfaces might have trouble in this case. Plus, a user must know a lot about cryptography standards and encryption algorithms to successfully use the library.
Overall, OpenSSL for macOS is a powerful utility for managing and creating public keys, private keys and certificates for all kinds of projects.
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Open SSL
Cryptography and SSL/TLS Toolkit
Downloads
The master sources are maintained in our git repository, which is accessible over the network and cloned on GitHub, at https://github.com/openssl/openssl. Bugs and pull patches (issues and pull requests) should be filed on the GitHub repo. Please familiarize yourself with the license.
The table below lists the latest releases for every branch. (For an explanation of the numbering, see our release strategy.) All releases can be found at /source/old. A list of mirror sites can be found here.
Note: The latest stable version is the 3.0 series. Also available is the 1.1.1 series which is our Long Term Support (LTS) version, supported until 11th September 2023. All older versions (including 1.1.0, 1.0.2, 1.0.0 and 0.9.8) are now out of support and should not be used. Users of these older versions are encouraged to upgrade to 3.0 or 1.1.1 as soon as possible. Extended support for 1.0.2 to gain access to security fixes for that version is available.
OpenSSL 3.0 is the latest major version of OpenSSL. The OpenSSL FIPS Object Module (FOM) 3.0 is an integrated part of the OpenSSL 3.0 download. You do not need to download the 3.0 FOM separately. Refer to the installation instructions inside the download, and use the «enable-fips» compile time configuration option to build it.
For an overview of some of the key concepts in OpenSSL 3.0 see the libcrypto manual page. Information and notes about migrating existing applications to OpenSSL 3.0 are available in the OpenSSL 3.0 Migration Guide
The OpenSSL FIPS Object Module (FOM) 2.0 is also available for download. It is no longer receiving updates. It must be used in conjunction with a FIPS capable version of OpenSSL (1.0.2 series).
| KBytes | Date | File |
| 14627 | 2021-Sep-07 12:00:26 | openssl-3.0.0.tar.gz (SHA256) (PGP sign) (SHA1) |
| 9603 | 2021-Aug-24 13:46:31 | openssl-1.1.1l.tar.gz (SHA256) (PGP sign) (SHA1) |
| 1457 | 2017-May-24 18:01:01 | openssl-fips-2.0.16.tar.gz (SHA256) (PGP sign) (SHA1) |
| 1437 | 2017-May-24 18:01:01 | openssl-fips-ecp-2.0.16.tar.gz (SHA256) (PGP sign) (SHA1) |
When building a release for the first time, please make sure to look at the INSTALL file in the distribution along with any NOTES file applicable to your platform. If you have problems, look at the FAQ, which can be found online. If you still need more help, then join the openssl-users email list and post a question there.
PGP keys for the signatures are available from the OMC page. Current members that sign releases include Richard Levitte and Matt Caswell.
Each day we make a snapshot of each development branch. They can be found at https://www.openssl.org/source/snapshot/. These daily snapshots of the source tree are provided for convenience only and not even guaranteed to compile. Note that keeping a git local repository and updating it every 24 hours is equivalent and will often be faster and more efficient.
Legalities
Please remember that export/import and/or use of strong cryptography software, providing cryptography hooks, or even just communicating technical details about cryptography software is illegal in some parts of the world. So when you import this package to your country, re-distribute it from there or even just email technical suggestions or even source patches to the authors or other people you are strongly advised to pay close attention to any laws or regulations which apply to you. The authors of OpenSSL are not liable for any violations you make here. So be careful, it is your responsibility.
Downloads
Please report problems with this website to webmaster at openssl.org.
Copyright © 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
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