Access App Identifier Prefix programmatically

user_740597 0
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How can I access the Bundle Seed ID/Team ID/App Identifier Prefix string programmatically? (These are all the same thing as far as I can tell).

I am using the UICKeychainStore keychain wrapper to persist data across several applications. Each of these applications has a shared keychain access group in their entitlement plists, and share the same provisioning profile. By default, the keychain services use the first access group in the plist as the access group to save data to. This looks like "AS234SDG.com.myCompany.SpecificApp" when I debug UICKeychainStore. I would like to set the access group to "AS234SDG.com.myCompany.SharedStuff", but I can't seem to locate how to get the "AS234SDG" string of the access group programmatically, and would like to avoid hard-coding it if possible.

ipad objective-c iphone cocoa-touch ios
5 Answers

Here is the Swift version of @David H answer:

static func bundleSeedID() -> String? {
        let queryLoad: [String: AnyObject] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrAccount as String: "bundleSeedID" as AnyObject,
            kSecAttrService as String: "" as AnyObject,
            kSecReturnAttributes as String: kCFBooleanTrue
        ]

        var result : AnyObject?
        var status = withUnsafeMutablePointer(to: &result) {
            SecItemCopyMatching(queryLoad as CFDictionary, UnsafeMutablePointer($0))
        }

        if status == errSecItemNotFound {
            status = withUnsafeMutablePointer(to: &result) {
                SecItemAdd(queryLoad as CFDictionary, UnsafeMutablePointer($0))
            }
        }

        if status == noErr {
            if let resultDict = result as? [String: Any], let accessGroup = resultDict[kSecAttrAccessGroup as String] as? String {
                let components = accessGroup.components(separatedBy: ".")
                return components.first
            }else {
                return nil
            }
        } else {
            print("Error getting bundleSeedID to Keychain")
            return nil
        }
    }
user_24593300

If you search in Xcode on your team's ID then you will see that this value is hosted in the build settings under the key DEVELOPMENT_TEAM.

You can retrieve this key by putting in your Info.plist file:

<key>DEVELOPMENT_TEAM</key>
<string>$(DEVELOPMENT_TEAM)</string>

Make sure to put this in every target's Info.plist file where you want to retrieve it using this code:

let teamID = Bundle.main.infoDictionary!["DEVELOPMENT_TEAM"] as! String

This solution will give you the team ID without the dot suffix.

The solution in https://stackoverflow.com/a/28714850/2743633 worked for me only to get the team ID from the main app target. It would not retrieve the team ID when doing the same for a Share Extension target.

user_27436330
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