On Debian/Ubuntu distros, you can install this package using the APT: apt-get install openssl In this case the openssl-1:1.1.86_64 package is already installed. On RedHat/CentOS/Fedora you can install OpenSSL as follows: yum install openssl First, you need to install the OpenSSL package.
Let’s look at how to convert CRT/DER certificate file to the PEM format on Linux.
Open it and make sure it is encoded in Base64. When you are converting your certificate files to different formats using OpenSSL, your certificate private data is secured, since it’s never stored by the OpenSSL during the file conversion.Īfter executing the command, the new file my_ should appear in the same folder. This command helps you to convert a DER certificate file (.crt.
If the crt file is in binary format, then run the following command to convert it to PEM format: Openssl.exe x509 -inform DER -outform PEM -in my_certificate.crt -out my_Ĭhange certificate file names to your own. After that, run the command prompt with administrator privileges and go to the folder: cd C:\OpenSSL\bin
In case your crt file is in binary format, you can convert it using the OpenSSL utility for Windows (in this case we used the open SSL port gnuwin32, version 0.9.8h).ĭownload the archive with OpenSSL binaries (openssl-0.9.8h-1-bin.zip) and extract it to a local folder (for example C:\OpenSSL). How to Convert CRT SSL Certificate to PEM on Windows? With OpenSSL you can print out information about a certificate file: openssl x509 -in /root/cert.pem –text Converting using the OpenSSL library is considered one of the safest ways: all data will be saved directly on the device on which the conversion operations will be performed. OpenSSL is a toolkit for Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols (also a general-purpose cryptography library). The most commonly used conversion tool is OpenSSL. In order to convert SSL certificate files, you need to use third-party tools. This means your certificate is already in the PEM format. If the contents of the file start with -– BEGIN, and you can read it in a text editor, this indicates that the file already uses the base64 format, which can be read in ASCII (the file is not in binary format). crt file using any text editor, or list its contents using PowerShell: gc. PEM format.įirst of all, check if your certificate file isn’t already in PEM format, but the file itself has a. KEY - this file extension is used for PKCS#8 public and private keys, which can be stored in binary. This type of certificate file is most commonly used on UNIX/ Linux operating systems The certificate itself can be a binary (.DER) or ASCII - (.PEM). CRT - an extension for certificate files.