OpenSSL

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Want to learn what version of OpenSSL you have?

OpenSSL - CSR content. View the content of CA certificate. We can use our existing key to generate CA certificate, here ca.cert.pem is the CA certificate file: # openssl req -new -x509 -days 365 -key ca.key -out ca.cert.pem.

Openssl S_client

OpenSSL is an open-source cryptographic library and SSL toolkit. The applications contained in the library help create a secure communication environment for computer networks.

OpenSSL

OpenSSL contains an implementation of SSL and TLS protocols, meaning that most servers and HTTPS websites use its resources.

  • Feb 12, 2020 OpenSSL is a full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. It is licensed under an Apache-style license. This tutorial will help you to install OpenSSL on Windows operating systems. Step 1 – Download OpenSSL Binary Download the latest OpenSSL windows installer file from the following download page.
  • OpenSSL is a very useful open-source command-line toolkit for working with SSL/TLS certificates and certificate signing requests (CSRs). With OpenSSL you can easily: Convert between different certificate file formats (for example, generating a PFX/P12 file from a PEM or PKS#7/P7B file ).

In this tutorial, learn how to find the OpenSSL version with a single command.

Csr
  • A command-line/terminal window.
  • OpenSSL installed on your system.

The openssl version command allows you to determine the version your system is currently using. This information is useful if you want to find out if a particular feature is available, verify whether a security threat affects your system, or perhaps report a bug. Type in:

OpenSSL

The resulting data will consist of the OpenSSL version designation and the date of its initial release.

The output is clear and easy to understand. We can break down the version format to get valuable insight. Additionally, using flags can help structure the data.

The format of the version provides a lot of information. The position of the numbers represent the release type:

Openssl Windows

  • Major Releases – You can recognize a major release if one or both of the first two digits change. This type of release can break compatibility with previous versions. For example: 1.1.0g vs. 1.2.0
  • Minor Releases – A minor release changes the last number of the version designation, e.g., 1.1.0 vs. 1.1.1. These releases are likely to contain new features; however, they should not break binary compatibility. You do not need to recompile applications to benefit from them.
  • Letter Releases – The release designation in our example 1.1.0g contains bug and security fixes exclusively. No new features were added.

Note: The next planned version of OpenSSL is 3.0.0. Once the new version is released, the versioning scheme is going to change to a more contemporary format: MAJOR.MINOR.PATCH

By using a general flag –help we can see an overview of all valid options for openssl version.

Openssl download

There are eight (8) valid options that allow you to narrow your search. The option that provides the most comprehensive set of information is:

This command compiles all the information contained under the individual flags into a single output.

This option is convenient, especially when troubleshooting or composing a bug report.

The OPENSSLDIR line is especially interesting, as it will tell you where OpenSSL will look for its configurations and certificates. You can print out that specific line by using the following command:

In this example, the configuration files and certificates are located at /usr/lib/ssl

Now you have learned how to check the OpenSSL version.

You should now understand how to interpret that data. And how it can be used to improve server security, troubleshoot or submit a bug request.

The flags presented in the article provided you with the necessary tools to help you make an informed decision and administer your system effectively.

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