title: How to create P12 certificate for iOS distribution
body: <p>We have an iOS app whose push notification cert has expired and we're trying to create a new one.  I've created new certs in the Provisioning portal (ios_developer.cer, ios_distribution.cer) and downloaded them.  I was following instructions <a href="https://stackoverflow.com/questions/1453286/aps-developer-identity-cer-to-p12-without-having-to-export-from-key-chain">here on Stack Overflow</a> to convert it to PEM and then to P12 files, but I'm stuck.  When I then attempt to convert the PEM to P12, it wants a private key of some sort, and I don't know where to get it.</p>
  
  <p>I've also tried loading these into Keychain Access.  I had read that you could export them as P12 from there, but when I do the Import, they don't appear anywhere.</p>