Advanced App Building - Tips, Tricks & Lessons Learned

Advanced App
Building
Tips, Tricks & Lessons Learned

Wednesday, February 6, 13

Jay Graves
CTO


Lots of Apps


Ship It


Provisioning Profiles


How do they work?


What are they?

SMIME / PKCS#7

Originally designed for email signing & encryption.


Read a Provisioning Profile
vim


Read a Provisioning Profile
openssl

openssl smime -in ./your.mobileprovision -inform der -verify

openssl smime -in /path/to/your.mobileprovision -inform der
-verify -noverify

https://skabber.snipt.net/provisioning-proﬁle-tips-tricks/

Important Values
application-identifier

<key>application-identifier</key>

<string>ABCDEFGHIJK.com.your.bundleid</string>


Important Values
Entitlements
<key>Entitlements</key>
<dict>
...
<key>com.apple.developer.ubiquity-container-
identifiers</key>
...
<key>com.apple.developer.ubiquity-kvstore-
identifier</key>
...
<key>get-task-allow</key>
...
</dict>

Important Values
ProvisionedDevices

<key>ProvisionedDevices</key>
<array>
<string>7af8ee3af8e4e13193bd834bab50e1d...</string>
<string>a9f0d0477a6d3e8dad0ff984f7ba77e...</string>
</array>


Important Values
UUID

<key>UUID</key>

<string>E0EF8ACE-E83A-475C-9DA7-C67A147659FD</
string>


Important Values
DeveloperCertificates

<key>DeveloperCertificates</key>
! <array>
! ! <data>
MIIFnDCCBISgAwIBAgIIEIdrqpJlb9MwDQYJKoZIhvcNAQEFBQAwgZYxCzAJ
BgNVBAYTAlVTMRMwEQYDVQQKDApBcHBsZSBJbmMuMSwwKgYDVQQLDCNBcHBs
ZSBXb3JsZHdpZGUgRGV2ZWxvcGVyIFJlbGF0aW9uczFEMEIGA1UEAww7QXBw
bGUgV29ybGR3aWRlIERldmVsb3BlciBSZWxhdGlvbnMgQ2VydGlmaWNhdGlv
...


Important Values

-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----


Important Values

-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----

openssl x509 -text -in cert.pem


Important Values

Certificate:
Data:
Version: 3 (0x2)
Serial Number:
10:87:6b:aa:92:65:6f:d3
Signature Algorithm: sha1WithRSAEncryption
Issuer: C=US, O=Apple Inc., OU=Apple Worldwide Developer Relations, CN=Apple Worldwide
Developer Relations Certification Authority
Validity
Not Before: Nov 3 21:38:10 2012 GMT
Not After : Nov 3 21:38:10 2013 GMT
Subject: UID=9K9F9LCV74, CN=iPhone Distribution: Massively Overrated, OU=9K9F9LCV74,
O=Massively Overrated, C=US
Subject Public Key Info:
Public Key Algorithm: rsaEncryption
RSA Public Key: (2048 bit)
Modulus (2048 bit):
00:c8:57:f9:cf:af:c2:4d:7a:8a:16:62:47:4b:c2:


Install a Provisioning Profile


Don’t double click them.

Not human readable.


Drag them into the Finder

~/Library/MobileDevice/Provisioning Profiles



Much better

Tools for using Provisioning Profiles
Terminal.app


Terminal.app - bash alias

alias prov='openssl smime -inform der -verify -in'


Quicklook Plugin

http://www.macmation.com/blog/2011/10/quicklook-plugin-for-mobile-provision-ﬁles/


Automator Service


Automator Service

http://cl.ly/MTZb


Xcode


Xcode
How does it see profiles?


Xcode

CODE_SIGN_IDENTITY = "iPhone Developer";


Xcode

CODE_SIGN_IDENTITY = "iPhone Developer";
PROVISIONING_PROFILE = "";

Xcode

CODE_SIGN_IDENTITY = "iPhone Developer: Jay Graves (E6L876QFM6)";


Xcode

CODE_SIGN_IDENTITY = "iPhone Developer: Jay Graves (E6L876QFM6)";

PROVISIONING_PROFILE = "0FEB5831-22D3-4B1D-A973-59ED243E8103";


Xcode
Build error


Xcode
Update the profile.


Xcode
Project Diff


What does all this mean?


•Automatic Profiles
•Good if you don’t have multiple projects.
•It can select the wrong profile.
•Rules on automatic selection are not defined.


•Automatic Profiles
•Good if you don’t have multiple projects.
•It can select the wrong profile.
•Rules on automatic selection are not defined.
•Specific Profiles
•Much more control over which profile is selected.
•Can be a pain to update the project file every time a profile is updated.


Scenario


Scenario
1 Project 2 Builds


Multiple Build Scenario
Possible Solutions


Possible Solutions

•Add a Duplicate Target


Possible Solutions

•Large project ﬁle change


Possible Solutions

•Duplicated all of the Conﬁgurations


Possible Solutions

•A 2nd info.plist has been created.


Possible Solutions


• Add a new Conﬁguration


Possible Solutions


•Still a large project ﬁle change


Possible Solutions


•Still duplicated all the build options


Possible Solutions


•Still duplicated all the build options
•Easy to forget new build options


A better solution


A better solution

.xcconfig file


Create a .xcconfig file


Create a .xcconfig file

CODE_SIGN_IDENTITY = iPhone Distribution: Double Encore

PROVISIONING_PROFILE = 1203C18-8F08-45D8-A5AC-76AD9319CDDC


Build with a .xcconfig file

xcodebuild -xcconfig second_build.xcconfig


Surprise?


OK, OK, Enough with the
already.


Keychain
Access


Multiple Keychains


Switch Keychains
unlock keychain

security default-keychain -d user -s /FULLPATH/My.keychain
security unlock-keychain -p ******* /FULLPATH/My.keychain


Switch Keychains
unlock keychain

Error: User interaction is not allowed.


Switch Keychains
unlock keychain


OTA Install


md5
checksum


md5 checksum
doesn’t work


Install multiple apps
at the same time


Thank You
jay@doubleencore.com
@skabber


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