转自:https://blog.serverdensity.com/how-to-renew-your-apple-push-notification-push-ssl-certificate/

It’s coming up to a year since we launch our server monitoring iPhone application and so our Apple push notification SSL certificate is expiring in a few weeks. It is necessary to renew it and install the new certificate on our servers so we can continue sending push notifications for server alerts, and this quick post will take you through the steps.

You can generate a new certificate without revoking the old one, and use them simultaneously to ensure they are working before revoking the old one.

1) Log in

Log into the Apple iPhone Developer website and click the iPhone Provisioning Portal link. From the left menu, click on App IDs and then Configure next to the app you want to regenerate the certificate for. You’ll see your existing certificates and the option to generate a new one. Click the Configure button to launch the wizard.

2) Generate a CSR

I used the CSR I generated for the original APNS certificate but you can generate a new one by following the instructions in the wizard.

3) Generate the certificate

After uploading the CSR, the wizard will generate your new certificate. The name will show up as your username rather than what you specify in the CSR. Download it to your system, it will be called aps_production_identity.cer. Double click it to import it into your Keychain.

4. Export certificates / keys

Launch Keychain Assistant from your local Mac and from the login keychain, filter by the Certificates category. You will see an expandable option called “Apple Development Push Services”. You’ll see your old certificate and the new one you just downloaded.

Click the triangle to expand the certificate. You’ll have 2 items – the certificate itself that you just expanded, and the private key that was revealed.

Right click on the certificate (not the private key) “Apple Development Push Services” > Export “Apple Development Push Services ID123″. Save this as apns-prod-cert.p12 file somewhere you can access it. Then do the same with the private key and save it as apns-prod-key.p12.

For both exports, you will be asked to specify a password, then asked for your keychain password. I did not specify a password on the first prompt.

5) Convert to PEM format

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

1
2
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:

1
openssl rsa -in apns-prod-key.pem -out apns-prod-key-noenc.pem

6) Merge files

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

1
cat apns-prod-cert.pem apns-prod-key-noenc.pem > apns-prod.pem

And that’s it. You can replace your existing production certificate with the one you just created, and it’ll be valid for another year. Yay.

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