I build an OSX app which is distributed as a DMG outside of the Mac App Store, and I'd like to continue to have it be that way once Gatekeeper enforcement begins.
From studying code signing documentation, it looks like the recommended approach is to get a "Developer ID" certificate and use that to codesign. However, you must be a registered OSX developer and pay Apple $99 each year. I already have a certificate from a recognized CA, and I would like to use it with codesign. I found documentation on how to do this, but I cannot tell whether Gatekeeper will allow applications signed using certs issued by other CAs, not Apple.
Does anyone know?
Gatekeeper only recognizes apps signed with Developer ID, not just any signature. See this which also explains how to test Gatekeeper functionality under Lion.
The point is that if Apple owns the certificate authority, they can revoke the certificate if your app turns out to be a trojan or something.
Related
I'm distributing my macOS app outside the App Store and so far I've never code-signed it. My app targets advanced users who know how to configure macOS to allow the app to run.
With the arrival of the Apple M1 computers, however, things have changed as code-signing seems to be mandatory now for native Apple Silicon apps. That's why I'd like to ask: Is it sufficient to sign my app using a self-signed certificate when distributing it outside the App Store? Will it be possible for users who download an app that was signed using a self-signed certificate to run that app?
I'd expect that Gatekeeper will probably block such an app first because it was signed using a self-signed certificate but will users be able to override Gatekeeper's veto in the security settings (as it was previously the case with non-signed apps)?
Or do all apps built for Apple Silicon have to be signed with an official Apple certificate? I'd like to avoid that because last time I checked this was $99 per year.
You can codesign with ad-hoc feature. codesign -s - -f /path/to/filename. This doesn't need certificate.
I have created an electron app. Now I want to sign code for both windows and mac platform. But I have only go daday pfx certificate.I successfully signed code using pfx certificate from go daday in windows platform. So,Can I sign an electron app on macos platform using go daday certificate?
You can sign a macOS app with a GoDaddy code-signing certificate, but it probably won't do what you want. Here's what Apple's developer documentation says (with my emphasis added):
Note: Apple uses the industry-standard form and format of code signing
certificates. Therefore, if your company already has a third-party
signing identity that you use to sign code on other systems, you can
use it with the macOS codesign command. Similarly, if your company is
a certificate issuing authority, contact your IT department to find
out how to get a signing certificate issued by your company. However,
while these valid certificates allow you to sign your code, you can
only distribute through the App Store or through the Developer ID
program when you sign with a certificate issued by Apple.
So, the question is: how is your application going to be distributed to users' computers?
If it's sold through Apple's App Store, you need to become an Apple Developer, get a Mac App Distribution certificate from Apple, and sign the app with that before submitting it to Apple.
If it's distributed outside Apple's App Store (e.g. via web download), then you also need to become an Apple developer, get a Developer ID certificate, and use that to sign it. If you don't sign it with the right kind of certificate, Gatekeeper will prevent users from opening the app unless they go through a special procedure to trust the app.
Either way, you need to join the Apple Developer program, and use an Apple-issued code signing certificate to sign the macOS version of your app.
Apple seems to restrict some OS X APIs (e.g. sandboxing) to applications that are codesigned by a trusted certificate, e.g. one issued to members of the paid Mac Developer program.
How does OS X treat applications that are codesigned with a self-signed (or a development) certificate?
Will those features/APIs be available, and the only difference be that users with the default Gatekeeper settings cannot (easily) launch such an application?
Will they be treated just like unsigned apps in every way (entitlements and sandboxing disabled, warning for Gatekeeper users)?
Or will a self-signed certificate be considered an error, and the app will not launch at all regardless of the user's Gatekeeper settings?
AFAIK, apps that aren't code-signed with a certificate that Gatekeeper accepts, would be treated as unsigned. I don't know about access to specific features and API.
But you can make your self-signed cert acceptable to the Gatekeeper. If you sign your code using certificates that weren't issued by Apple, every machine you want to run that code as signed, would have to (a) have your certificate installed, and (b) have policies set via spctl command that tell the Gatekeeper to allow executing and/or installing code signed by that cert. This part has been tested and verified on Mavericks.
It is more difficult with kernel extensions. I'm still working on that. :-)
I have an application (installer, actually) that was built outside of Xcode which I have codesigned using the codesign utility, but when I try to install it after downloading the signed app, Gatekeeper complains that it comes from an unidentified developer. I have tried using the "3rd Party Mac Developer:..." identity, as well as my own "Mac Developer:..." identity; same result in either case. codesign (as far as I can tell) says all is well, so I'm thinking I'm either using the wrong identity (in which case my question is what I should use/make-to-use instead) or the signature is fine, but there is something that needs to be done w/ my developer account (in which case my question is what might that be).
According to Apple, and verified by me :), there is another set of identities specifically for signing apps to satisfy the intermediate security setting in Gatekeeper, but only a Team's Agent can get, which is why I wasn't getting them. My agent got them, I used them, and Gatekeeper is happy.
Our company develops our application for both Mac OS X and Windows. We have an existing purchased code signing certificate from a non-Apple authority we use to ID our Windows installers. We distribute both our DMGs & MSIs through our own company website.
The code signing guide for Mountain Lion's new Gatekeeper feature seems to imply that a non-Apple issued standard certificate would work, though I could be misinterpreting what "third-party" means in this case:
Note: Apple uses the industry-standard form and format of code signing
certificates. Therefore, if your company already has a third-party
signing identity that you use to sign code on other systems, you can
use it with the OS X codesign command...
Is it possible to use this non-Apple certificate, and if so, how could it be incorporated using the command line "codesign" command?
Cannot take credit for this, but the blunt answer is:
NO
I just spent a good three days converting certificates and searching the internets to find these:
http://successfulsoftware.net/2012/08/30/how-to-sign-your-mac-os-x-app-for-gatekeeper/
http://www.panic.com/blog/2012/02/about-gatekeeper/
http://arstechnica.com/apple/2012/02/developers-gatekeeper-a-concern-but-still-gives-power-users-control/
No.
The reason it will not work is: To pass through GateKeeper, you need a code signing certificate which is signed with your Apple Developer ID. This is not the same as a regular code signing certificate issued to your company. Only Apple issues Apple Developer IDs. (Or at least, at the time of this writing.)
This is very confusing because:
The company we bought the code signing certificate from specifically claimed it works with MacOS. But what they meant was we could sign Apple code technically speaking. But passing GateKeeper is different. (Unclear marketing to say the least.)
At this time, there are unclear Apple docs which talk about signing code with 3rd party certificates. Ex: https://developer.apple.com/library/mac/documentation/security/conceptual/CodeSigningGuide/Procedures/Procedures.html
However, while you can sign the code, it does not pass GateKeeper! Again, this may refer to either internal corporate application use, or it may just be out of date.
Gatekeeper only recognises Apple digital certificates. Windows only recognises Comodo, Verisign and a few other signing authorities. So you need to buy a Comodo (or similar) certificate for Windows and pay $99 per year for the Apple developer program so you can get an Apple certificate as well. It is rather annoying, to say the least.