When working with SSL certificates, you may need to combine the private key and the certificate into a single .pem file. A .pem file is a container format that can hold both the private key and the certificate in one file. In this blog, we will discuss how to get the .pem file from the .key and .crt files using OpenSSL.

OpenSSL is a popular open-source toolkit for implementing SSL and TLS protocols. It is widely used to generate SSL certificates for websites and other applications.

Steps to get the .pem file from the .key and .crt files using OpenSSL:

Before getting the .pem file from the .key and .crt files, make sure that OpenSSL is installed on your system. If not, install it using the package manager of your operating system.

The first step in getting the .pem file from the .key and .crt files is to convert the .key file to .pem format. You can do this using the following command:

openssl rsa -in private.key -out private.pem

This command will create a private.pem file that contains the private key in .pem format.

Combine the .crt file and the .pem file into a single .pem file:

Once you have the private key in .pem format, you can combine it with the certificate in a single .pem file. You can do this using the following command:

cat certificate.crt private.pem > ssl_certificate.pem

This command combines the certificate in the certificate.crt file and the private key in the private.pem file into a single ssl_certificate.pem file.

After combining the .crt file and the .pem file, you can verify the resulting .pem file using the following command:

openssl x509 -noout -text -in ssl_certificate.pem

This command displays information about the SSL certificate in the ssl_certificate.pem file.

Getting the .pem file from the .key and .crt files is a simple process that involves converting the private key to .pem format, combining it with the certificate, and verifying the resulting .pem file. The .pem file can be used for a variety of purposes, such as configuring SSL/TLS on web servers, securing email communication, and encrypting data transmitted over networks. It is important to keep the private key and the certificate secure and to protect them from unauthorized access.

This blog explains how to use OpenSSL to convert a private key to PEM format, combine it with a certificate, and create a PEM file.

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