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iOS Development Pro Tip for Private CA Usage 2019-03-22 Katie Berry

In iOS, in order to get HTTPS working with certs from a private CA; there's another step you need to do if your users are on iOS 10.3 or newer (statistically: yes this matters to you). In order to do this:

  • Ensure they have installed the profile on their device
  • Open Settings
  • Select General
  • Select Profiles
  • Ensure your root CA name is visible in the profile list like this:

  • Go up a level to General
  • Select About
  • Select Certificate Trust Settings
  • Each root that has been installed via a profile will be listed below the heading Enable Full Trust For Root Certificates
  • Users can toggle on/off trust for each root:

Please understand that by doing this, users will potentially be vulnerable to a HTTPS man in the middle attack a-la Superfish. Please ensure that you have appropriate measures in place to keep the signing key for the CA safe.

I hope this helps.