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Installation OpenSSL

Installation OpenSSL

OpenSSL can be used to create a key pair and generate a Certificate-Signing-Request (CSR) document.

The command line tool OpenSSL should be pre-installed on all Unix and Linux based operating systems.

On Windows, OpenSSL must be installed and configured separately to perform the necessary key operations.

OpenSSL is available for download at the following URLs:

Please refer to the separate installation instructions on the OpenSSL page. In particular, it may be necessary to install a version of the VC++ redistributables that is compatible with OpenSSL. This is explained on the OpenSSL (binaries für Windows) website.

Furthermore, the environment variable "HOME" should be set or adapted, e.g:


The variable "RANDFILE" must also be set:


If an adapted version of the "openssl.cfg" are used, this can also be defined via an environment variable, e.g:

OPENSSL_CONF = %HOME%\openssl.cfg

If access violations occur when running OpenSSL (e.g. "private.pem: Permission denied ..."), please note that the command line interpreter used, e.g. Command Prompt and Powershell, or users must have appropriate access rights to the specified files.

Further Steps:

last changed on 07/07/2022

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