GenericKeychain

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GenericKeychain

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Apple's GenericKeychain project which has been updated to support ARC and modern Objective-C syntax.

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## Description
This sample shows how to navigate through the Keychain Services API provided by iOS. Its demonstration leverages the Generic Keychain Item class and provides a template on how to successfully set up calls  to: `SecItemAdd`, `SecItemCopyMatching`, `SecItemDelete`, and `SecItemUpdate`.

The user interface is a master-detail designed in Interface Builder, archived in the MainWindow nib. The user interface is modeled on a typical iOS app preferences screen.

The sample builds two separate applications from the same code base. Both applications have their own keychain item that stores a username and password. Both apps also share a second keychain item that stores an account number. This takes advantage of the shared keychain item capability added in iOS 3.0.

## Testing
The ability to share keychain items between apps is based on code signing entitlements. These in turn are based on the app ID prefix that is contained in your provisioning profile. All apps that share a keychain item must be built using the same app ID prefix.

The sample must be edited to include your app ID prefix in five places where the text `"YOUR_APP_ID_HERE"` appears before building and running the sample apps. The easiest way to do that is to use Xcode's Find in Project command to locate the places that must be edited first. Just change the app ID prefix; leave the rest unchanged.

Next, make `GenericKeychain` the active target and select Build and Go to run the first app `GenericKeychain`.

Finally, make `GenericKeychain2` the active target and select Build and Go to run the second app `GenericKeychain2`.

### Note
Apps that are built for the simulator aren't signed, so there's no keychain access group for the simulator to check. This means that all keychain items are in the same default access group and all apps can see all keychain items when run on the simulator.

If a SecItem contains an access group attribute, `SecItemAdd` and `SecItemUpdate` on the simulator will return -25243 (`errSecNoAccessForItem`).

The sample is written to ignore the access group if built for the simulator.

##Build requirements
iOS 4 SDK

##Runtime requirements
iOS 3.2 or later

## Packaging list
- `AppDelegate` Adds the root navigation controller's view to the main window and displays the window when the 
application launches.
- `KeychainItemWrapper` Abstract interface to Keychain Services that wraps a single keychain item.
- `DetailViewController` Custom detail view controller.
- `EditorController` View controller subclass for abstracting an interface to either a text field or a text view.
- `MainWindow.xib` The nib file containing the main window and the view controllers used in the application.

##Changes from previous versions
###Version 1.2
Fixed minor memory leak and upgraded project to build with the iOS 4 SDK.

###Version 1.1
Adopted UITableView and UITableViewCell API for iPhone OS 3.0. Added support for
shared keychain items.

###Version 1.0
N/A

GenericKeychain

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