I have been reading the document, but I am getting confused.
There is iOS Keychain here.
And there is iCloud Keychain here.
They both called keychain and both able to store locally and sync to other devices.
Are they just the same thing?
Or iOS keychain service doesn't require iCloud account for local storage at all?
iOS Keychain is a service which allows you to persist user-sensitive information in your application.
iCloud Keychain is a service provided by Apple which syncs your Safari passwords as well as Mail, Contacts, Calendar, and Messages synced across all of the devices signed in with a specific Apple ID.
Related
In AppStore when an app transferred to different account and new account publish new version, does Apple remove app's keychain data due to encryption?
Thank you.
I'm really confused and hence asking this - does every iOS app has it's own keychain on device(iPhone) or there is only one keychain on device (iPhone) which is used by the different apps ?
Thanks
As mentioned in Apple docs. For the iPhone, there is only one keychain and apps can store their keychain items in it.
In iOS, apps have access to a single keychain (which logically
encompasses the iCloud keychain). This keychain is automatically
unlocked when the user unlocks the device and then locked when the
device is locked. An app can access only its own keychain items, or
those shared with a group to which the app belongs. It can't manage
the keychain container itself.
Reference: https://developer.apple.com/documentation/security/keychain_services/keychains
Suppose I have one app called "AppBuddy" on the AppStore.
Now If I download AppBuddy on one iPad, add one user profile in it, save data into plist and sync that plist to iCloud.
Now I download AppBuddy on 2nd iPad using same AppleID. Can I get that plist from iCloud server and show that user profile on my iPad ?
Is this possible?
Yes, it is possible with some conditions
the iCloud id on both devices is the same and the user is logged in to iCloud on both devices. iTunes accounts used to purchase apps can be different from iCloud sync account.
the app implements syncing data using iCloud
If you need help on how to support iCloud in apps, this tutorial will help.
Our iOS app is transfer from Account A to B, Earlier we had used the certificates which was created in Account A and upload a build on iTunes Connect using certificates of Account A.
Now when we uploading app on iTunesconenct for Beta Testing that time we have used the certificates which was created in Account B(Due to Transfer App Account).
So, Now application identifier of the live app is different from the application identifier of the Beta TestFlight Testing App on App Store. And we have got the warning potential loss of keychain access.
Right Now, We are using SSKeychain Wrapper for Store UUID to track user.
[SSKeychain setPassword:UUID forService:#"com.example.appname” account:#“appname” error:&error]
If App ID Prefix changed then SSKeychain loss it’s access?
Because We track UUID in database for further use using SSKeychain. My doubt is if APPID Prefix changed then it is also effect the SSKeychain and it is generate new UUID for all devices?
So, How we can solve this issue ? Please let us know about solutions of this issue.
The keychain access is tied to the App(s) ID Prefix(s). They must have the same prefix. We had a case where different Apps in the same Developer Account and different Prefix(s) and they would not share the same keychain access. Had to have Apple fix so all were the same.
In your case, if you move the app to account B, the App ID will have a different prefix and would not be able to access the "old" keychain.
As far as I know there is NO workaround for this if the App Prefix has changed.
Yes, all devices would get a new keychain store for data and would not be able to access the "old" keychain data.
If I put some information into the keychain, my app is the only one who is able to have access to that data, correct?
The keychain data are shared across a developer's applications.
From the apple documentation:
Keychain data for an app is stored outside of the app’s sandbox. When
the user backs up app data using iTunes, the keychain data is also
backed up. Before iOS 4.0, keychain data could only be restored to the
device from which the backup was made. In iOS 4.0 and later, a
keychain item that is password protected can be restored to a
different device only if its accessibility is not set to
kSecAttrAccessibleAlwaysThisDeviceOnly or any other value that
restricts it to the current device. Upgrading an app does not affect
that app’s keychain data.
Here is an example of sharing keychain information between applications.
The data an app puts into the Keychain is restricted to a single developer's apps. It can be shared by multiple apps by the same developer if desired or restricted to that app.
See WWDC13 2013 video "Protecting Secrets with the Keychain". You can access it either on you computer or on an iOS device with the Apple WWDC app.