The /CN parameter needs to be set to the required hostname (e.g. subj /CN=You can use any filenames you like for the key and certificate (.cer) files. Then create the self signed certificate: openssl req -new -x509 -sha256 -key myselfsigned.key -out myselfsigned.cer -days 365 One of the easiest ways of creating a self-signed certificate is to use the OpenSSL command line tool that is available on most platforms and installed by default on Mac OSX.įirst create a private key file: openssl genrsa -out myselfsigned.key 2048 Tip #4 – Creating Self-Signed Certificates with OpenSSL is Easy However, it’s probably easier just to use OpenSSL as described in the next tip. It’s possible to fix this problem by installing and running the SelfSSL tool from the IIS 6 Toolkit. It most cases the computer name will not match the intended host name and you end up with a self-signed certificate that is never trusted – even when it is added to iOS: Unfortunately, IIS uses the computer name as the host name in the certificate: You just select the ‘Create Self-Signed Certificate’ menu item: Tip #3 – Don’t create Self-Signed Certificates within IISĬreating self-signed certificates in IIS appears to be easy. This would be a better option where email is not available or you have a larger number of iOS devices to manage.
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Once you’ve done this you use the certificate without warnings in Safari or other iOS apps that use the device’s keychain.Īlso unlike Safari SSL exceptions, you can access the certificate at any time in Settings->General->Profiles and remove it if required:Īpple provides an iPhone configuration utility for Mac and PC that can also install certificates. Then select Install to add the certificate. You can add an SSL certificate to the trusted list in iOS by simply emailing the file to yourself as an attachment: Tip #2 – Install Self-Signed Certificates as an iOS Configuration Profile
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This no longer seems to work in iOS 7 (please leave a comment if you know how to do this). In previous versions going to Settings->Safari and selecting ‘Clear Cookies and Data’ would delete it.
It doesn’t install the certificate as a trusted certificate on iOS. Accepting the certificate in Safari just adds an SSL exception that prevents Safari warning you about the site.This would allow you to open the site in Safari, but there are two significant downsides: It’s tempting to just select Continue or Details->Accept when you first try using your self-signed certificate in Safari: Tip #1 – Don’t Accept your Self-Signed Certificate in Mobile Safari The rest of this post provides tips on how to setup iOS to avoid these errors and how to simplify the creation and management of self signed certificates. The HttpWatch iOS app provides some more detail: In Mobile Safari you would see an error like this: The downside of using self-signed certificates is that browsers will not automatically trust sites that use them. Self-signed SSL certificates allow you to quickly create certificates for free, without having to pay a Certificate Authority (CA) or comply with any auditing requirements. You might need to setup SSL on development and test servers that have different host names or on systems that will only ever be accessed on your local network. SSL certificates are relatively cheap to purchase, but sometimes it would be easier if you could create your own. Five Tips for Using Self Signed SSL Certificates with iOS
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