Converting from PEM to DER code example
Example 1: convert pem to private key openssl
openssl rsa -outform der -in private.pem -out private.keyExample 2: convert pem to crt
openssl x509 -outform der -in your-cert.pem -out your-cert.crtopenssl rsa -outform der -in private.pem -out private.keyopenssl x509 -outform der -in your-cert.pem -out your-cert.crt