iOS Push notification sending error

I am an iOS app developer and don't know much about php. I am following raywenderlich push notification tutorial to generate an SSL certificates and private key for push notification. I followed the steps 3-4 times but it does not work. I had followed the same steps previously and it worked. I think the issue is in the response I get when I test connecting to APNS server using SSL certificate. I am getting below response. ``` CONNECTED(00000003) depth=1 /C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C verify error:num=20:unable to get local issuer certificate verify return:0 --- Certificate chain 0 s:/C=US/ST=California/L=Cupertino/O=Apple Inc./OU=iTMS Engineering/CN=gateway.sandbox.push.apple.com i:/C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C 1 s:/C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C i:/O=Entrust.net/OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/OU=(c) 1999 Entrust.net Limited/CN=Entrust.net Certification Authority (2048) --- Server certificate -----BEGIN CERTIFICATE----- MIIFGzCCBAOgAwIBAgIETBz90jANBgkqhkiG9w0BAQUFADCBsTELMAkGA1UEBhMC VVMxFjAUBgNVBAoTDUVudHJ1c3QsIEluYy4xOTA3BgNVBAsTMHd3dy5lbnRydXN0 Lm5ldC9ycGEgaXMgaW5jb3Jwb3JhdGVkIGJ5IHJlZmVyZW5jZTEfMB0GA1UECxMW KGMpIDIwMDkgRW50cnVzdCwgSW5jLjEuMCwGA1UEAxMlRW50cnVzdCBDZXJ0aWZp Y2F0aW9uIEF1dGhvcml0eSAtIEwxQzAeFw0xMjA1MjUyMzM3NDZaFw0xNDA1MzEw NTA4NDhaMIGPMQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTESMBAG A1UEBxMJQ3VwZXJ0aW5vMRMwEQYDVQQKEwpBcHBsZSBJbmMuMRkwFwYDVQQLExBp VE1TIEVuZ2luZWVyaW5nMScwJQYDVQQDEx5nYXRld2F5LnNhbmRib3gucHVzaC5h cHBsZS5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC/r1z4BRFu DIU9/vOboVmd7OwaPPLRtcZiZLWxSyG/6KeRPpaeaC6DScvSDRoJuIeTDBup0bg4 08K0Gzh+lfKRlJOC2sma5Wgvk7oP4sty83My3YCZQv4QvgDhx+seONNs6XiA8Cl4 ingDymWGlzb0sTdfBIE/nWiEOtXQZcg6GKePOWXKSYgWyi/08538UihKK4JZIOL2 eIeBwjEwlaXFFpMlStc36uS/8oy+KMjwvuu3HazNMidvbGK2Z68rBnqnOAaDBtuT K7rwAa5+i8GYY+sJA0DywMViZxgG/xWWyr4DvhtpHfUjyQgg1ixM8q651LNgdRVf 4sB0PfANitq7AgMBAAGjggFZMIIBVTALBgNVHQ8EBAMCBaAwHQYDVR0lBBYwFAYI KwYBBQUHAwEGCCsGAQUFBwMCMDMGA1UdHwQsMCowKKAmoCSGImh0dHA6Ly9jcmwu ZW50cnVzdC5uZXQvbGV2ZWwxYy5jcmwwZQYIKwYBBQUHAQEEWTBXMCMGCCsGAQUF BzABhhdodHRwOi8vb2NzcC5lbnRydXN0Lm5ldDAwBggrBgEFBQcwAoYkaHR0cDov L2FpYS5lbnRydXN0Lm5ldC9sMWMtY2hhaW4uY2VyMEAGA1UdIAQ5MDcwNQYJKoZI hvZ9B0sCMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly93d3cuZW50cnVzdC5uZXQvcnBh MB8GA1UdIwQYMBaAFB7xq4kG+EkPATN37hR67hl8kyhNMB0GA1UdDgQWBBSgNiNR qtTShi8PuJ7UNUEbeE71STAJBgNVHRMEAjAAMA0GCSqGSIb3DQEBBQUAA4IBAQAS EDkUyBHVdRJnCLHY8w9ec92NWqBYqKiSGP0uVCvgpsJIWDBkCGIw1Olks6mQuS9+ R7VRJJFg7EhtufmoRIvjgntKpTe49sB/lrmiZVQGnhjd6YdyYm9+OBUWRvwketLM v0S+nxZD0qLLJ9foVUB8zP8LtutqFJ5IZw1xb9eSNzhpKkQ9ylj8MCd4tpXZxICL Gt327poTXwmjQ+31fz7HCQCowMHccP8kiKM5SeYC9q+nkmdaozHVvw4e1RsP+EWO vPtcH1x1BCkTJajmrO7JuRPLuBEnZGSPUVFRKWP9jy0a28VnJek+oA7rRMRD8irU fMGbLqkGn8YogdPqe5T1 -----END CERTIFICATE----- subject=/C=US/ST=California/L=Cupertino/O=Apple Inc./OU=iTMS Engineering/CN=gateway.sandbox.push.apple.com issuer=/C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C --- No client certificate CA names sent --- SSL handshake has read 2731 bytes and written 2177 bytes --- New, TLSv1/SSLv3, Cipher is AES256-SHA Server public key is 2048 bit Secure Renegotiation IS supported Compression: NONE Expansion: NONE SSL-Session: Protocol : TLSv1 Cipher : AES256-SHA Session-ID: Session-ID-ctx: Master-Key: 0E813189A9AA0F93F3C996DB3D80240F742EB24656AEED9DC18043DCEDD854E9B1C4798098312EB7F6CAB23B10FF343C Key-Arg : None Start Time: 1393333259 Timeout : 300 (sec) Verify return code: 0 (ok) ``` In beginning of response it gives error `verify error:num=20:unable to get local issuer certificate`. In later part of response also it says `No client certificate CA names sent`. I am not aware these things, but I suspect the problem is with these errors. EDIT : Error I get while sending notification using sample php script provided in tutorial. ``` Warning: stream_socket_client(): Unable to set private key file `/Users/akashpatel/Desktop/SimplePush/ck.pem' in /Users/akashpatel/Desktop/SimplePush/simplepush.php on line 25 Warning: stream_socket_client(): failed to create an SSL handle in /Users/akashpatel/Desktop/SimplePush/simplepush.php on line 25 Warning: stream_socket_client(): Failed to enable crypto in /Users/akashpatel/Desktop/SimplePush/simplepush.php on line 25 Warning: stream_socket_client(): unable to connect to ssl://gateway.sandbox.push.apple.com:2195 (Unknown error) in /Users/akashpatel/Desktop/SimplePush/simplepush.php on line 25 Failed to connect: 0 ``` EDIT : Using this app (suggested by segev in his answer) I tested whether any issue with certificate/private key. I could receive a notification successfully. So I guess problem is not with certificate/private key. PHP Script I am using : ``` <?php $deviceToken = 'r34f34f5g45g5y56u76hj676elfjn4urno43f958gh945g8g7'; // Put your private key's passphrase here: $passphrase = ‘pasphrase’; // Put your alert message here: $message = 'Received push notification!'; //////////////////////////////////////////////////////////////////////////////// $ctx = stream_context_create(); stream_context_set_option($ctx, 'ssl', 'local_cert', 'ck.pem'); stream_context_set_option($ctx, 'ssl', 'passphrase', $passphrase); // Open a connection to the APNS server $fp = stream_socket_client( 'ssl://gateway.sandbox.push.apple.com:2195', $err, $errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx); if (!$fp) exit("Failed to connect: $err $errstr" . PHP_EOL); echo 'Connected to APNS' . PHP_EOL; // Create the payload body $body['aps'] = array( 'alert' => $message, 'sound' => 'default' ); // Encode the payload as JSON $payload = json_encode($body); // Build the binary notification $msg = chr(0) . pack('n', 32) . pack('H*', $deviceToken) . pack('n', strlen($payload)) . $payload; // Send it to the server $result = fwrite($fp, $msg, strlen($msg)); if (!$result) echo 'Message not delivered' . PHP_EOL; else echo 'Message successfully delivered' . PHP_EOL; // Close the connection to the server fclose($fp); ``` EDIT : My script works when I use it in production server. But I will keep this question open as it is not working in local server. Suggestions might help others for whom its not working in production server.