Convert ApplePushNotificationService Certy&KEY to PEM file

APNStoPEM

1) Convert to PEM format

These files now need to be converted to the PEM format by executing these 2 commands from the terminal:

openssl pkcs12 -clcerts -nokeys -out apns-prod-cert.pem -in apns-prod-cert.p12
openssl pkcs12 -nocerts -out apns-prod-key.pem -in apns-prod-key.p12

You will be forced to set a PEM passphrase on the second command, so execute the following command to remove it:
openssl rsa -in apns-prod-key.pem -out apns-prod-key-noenc.pem

2) Merge
Finally, you need to combine the key and cert files into a apns-prod.pem file we will use when connecting to APNS:

cat apns-prod-cert.pem apns-prod-key-noenc.pem > apns-prod.pem