Resign iOS app without specifying identity

Question

I am currently developing an app in Xamarin Studio, where I would like to modify the build info.plist via a script. Xamarin Studio unfortunately lacks a script build phase however, so my only option is really to run a script after the build, which of course breaks the signing.

Since different identities are used for different configurations I cannot make the identity static, and either way I'd really like to interfere with Xamarin as little as possible (I.E. be able to use the project settings etc).

Is there a way to resign the app using the identity it is currently signed with, via a shell script?

score 0 · Answer 1 · answered Jan 23 '14 at 15:04

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You can try to modify Info.plist and after that resign your application bundle again. I have never tried to do so, but I believe, it should work.

answered Jan 23 '14 at 15:04

Vytautas

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yes, but how do I resign the bundle using the same identity that it was previously signed with? – Stefan Fisk Jan 23 '14 at 15:05
Don't you know which one was previously used? You should have all provision profiles and signing identities on your machine. – Vytautas Jan 24 '14 at 15:17
I can find out by reading the build log, but I don't know how to script it. – Stefan Fisk Jan 24 '14 at 15:39

score 0 · Answer 2 · answered Jan 24 '14 at 09:32

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have you tried xcodebuild command, Identity is specified in the build configuration so you just need to mention the configuration.. you can find xcodeproj in /obj/xcode/somewhere

xcodebuild -project Xamarin.xcodeproj  -scheme TestApp -configuration "Ad Hoc"

answered Jan 24 '14 at 09:32

yasirmturk

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I have this all working properly in several Xcode projects, but that's only because the script build phase makes it trivial to implement. – Stefan Fisk Jan 24 '14 at 09:44
how would that work? there is not xcodeproj, only Visual Studio solution and project files. – Stefan Fisk Jan 24 '14 at 10:11
in there I can only find the temporary Xcode projects used when editing xibs. during build nothing xcode related is created in the obj folder, and when looking at the build output I cannot see xcodebuild being called anywhere, only mtouch. – Stefan Fisk Jan 24 '14 at 12:31

score 0 · Accepted Answer · edited May 19 '14 at 15:17

So I found a solution:

#!/usr/bin/env python

import sys
import subprocess
import re
import os

app_path = os.path.abspath(sys.argv[1])

signing_info = subprocess.Popen(['codesign', '--display', '--verbose=4', app_path], stdin=subprocess.PIPE, stderr=subprocess.STDOUT, stdout=subprocess.PIPE, close_fds=True).communicate()[0]

identity = re.search('Authority=(.*)', signing_info).group(1)

subprocess.call(['codesign', '--sign', identity, '--force', '--preserve-metadata=entitlements,resource-rules,requirements', '/Users/stefanfisk/Projekt/Tunaspot/Xamarin/App/Touch/bin/iPhone/Ad-Hoc/Touch.app'])

Resign iOS app without specifying identity

3 Answers3