libssl libcrypto

  make

  ./apns2-test -cert <cert.pem> -token <device-token> 

  apns2-test help
  apns2-test -cert -token [-dev] [-topic|-message|-payload|-uri|-port|-pkey|-prefix] [-debug]

  -dev              development (default: production)
  -topic            default: UID subject in cert.pem (aka: bundle-id of the app)
  -message          specified as value of key "alert" in payload
                    example: -message "message test."
  -payload          '<payload>' (a json object according to APNs protocol)
                    example: -payload '{"aps":{"alert":"payload test.","sound":"default"}}'
  
  -debug            verbose output for debugging

  rarely used options:
  
  -uri              default: api.[development.]push.apple.com
  -port             default: 2197
  -prefix           default: /3/device/
  -pkey             specify a private-key (,default alone with cert.pem)