1\openssl x509 -in aps.cer -inform DER -out aps.pem -outform PEM
2\openssl pkcs12 -nocerts -out key.pem -in key.p12
3\openssl pkcs12 -export -in aps.pem -inkey key.pem -certfile CertificateSigningRequest.certSigningRequest -name "push" -out push.p12