In case you do not know what OpenSSL is, we will tell you. OpenSSL is a security library included in all Linux systems. Its main objective is to provide an open source implementation of TLS and SSL protocols that protect and encrypt the transmission of data over a network. It is really important to use it because if our transmitted data falls into the hands of a third party, that person must decrypt it to get the information. This process is not easy to do, so by doing so, we safeguard the data.

So, let us start to install the latest version of OpenSSL on CentOS 7.

1.- Upgrade the system and install required packages

The first step is to update the system completely. This way you will have available all the available security updates.

:~$ su
:~# yum update

Then, you have to install some required packages to install OpenSSL.

:~# yum install make gcc perl pcre-devel zlib-devel

2. Install the latest version of OpenSSL on CentOS 7

OpenSSL is included in almost all Linux distributions. The problem is that they include older versions that although maintained by the distribution itself to be safe, are not the most recent. So for that, we will use the safest method which is to install it from its source code. With this, we will get a clean and reliable system.

So, first, you need to download the latest version using wget. Install it first.

:~# yum install wget
:~# wget https://ftp.openssl.org/source/old/1.1.1/openssl-1.1.1.tar.gz

Of course, at the time of writing this post, the latest stable version of OpenSSL is 1.1.1.

After that, decompress the file.

:~# tar xvf openssl-1.1.1.tar.gz

Next, navigate to the generated folder.

:~# cd openssl-1.1.1/

Then, you have to start configuring the package compilation using ./configure. Besides that, you have to use some parameters like the prefix where the route will be established.

:~# ./config --prefix=/usr --openssldir=/etc/ssl --libdir=lib no-shared zlib-dynamic

Now, begin compilation.

:~# make
:~# make test

Finally, install OpenSSL.

:~# make install

The process may take a few minutes. So you have to wait for it to finish.

Then, so you do not have problems using the library, you need to export the paths.

:~# export LD_LIBRARY_PATH=/usr/local/lib:/usr/local/lib64
:~# echo "export LD_LIBRARY_PATH=/usr/local/lib:/usr/local/lib64" >> ~/.bashrc

Finally, check the OpenSSL version.

:~# openssl version

So, that’s it.

Conclusion

OpenSSL is a very important library of the Linux system. So it’s a good idea to have its latest version installed, to improve system security and data encryption. The installation process from the source code is not difficult and has many advantages.

Please share this post with your friends.

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You can use OpenSSL for having some really important cryptographic operations like generating a private key, certificate conversion etc. The toolkit is officially released by source codes. In Linux, that’s not a problem. Downloading the source, building the code and using the toolkit is very simple. However, for Windows users, it’s a bit difficult. Here’s how you’ll install OpenSSL on your Windows system.

Download installer

You can download and compile OpenSSL from source all by yourself using different compilers. However, that’s a very lengthy process with lots of troublesome issues. So, I’m not going to cover that path. Instead, we’ll be using pre-compiled binaries.

Download OpenSSL. There are several types of available installers, but I recommend using the latest “Light” edition, as it contains the important and mostly used toolkits only. If you wish to have the full-featured client, download the normal (bigger size) installer. Here, I’m downloading the latest Win32-OpenSSL v1.1.0g Light. Note that with the releases of newer OpenSSL, the version will be different. If you need, you can also use the 64-bit edition, the officially recommended version.

Install OpenSSL

After downloading the file, let’s install it into our system

• Run the installer.

• Install the program normally, like other installations.

• Make sure that you install the toolkit in a suitable place. I recommend using the default path.

• Choose the default option. This way, there will be no confliction/issue(s) with the system.

• Bonus: support the project, as it depends on our donations to provide others for free.

Add the installation directory to PATH

If you wish to use OpenSSL via Command Prompt or shell, you need to add the path to Windows. Here’s how to do that.

• Go to Control Panel >> System and Security >> System.

• From the left panel, select “Advanced system settings”.
• From “Advanced” tab, click “Environment Variables”.

• Scroll down to the “System variables” section. Select “Path” >> click “Edit”.
• At the last part, enter the following line:

;C:\OpenSSL-Win32\bin

• Click “OK”.

Set the configuration file

The installation of Shining Light Productions contains a default “openssl.cfg” file. If you get an error like “Unable to load config info from /usr/local/ssl/openssl.cnf”, run the following command into an elevated Command Prompt.

set OPENSSL_CONF=c:\OpenSSL-Win32\openssl.cnf

To ensure that everything is set correctly, run the following command:

echo %OPENSSL_CONF%

If everything’s ok, you’ll get the following result:

If you need, you can get a fresh copy of “openssl.cnf” right here.

Now, your OpenSSL installation is complete!

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