KeyClip

KeyClip is yet another Keychain library written in Swift.

Features

• Multi Types ( String / NSDictionary / NSData )
• Error Handling
• Settings ( kSecAttrAccessGroup / kSecAttrService / kSecAttrAccessible )
• Works fine with release ( Fastest [-O] ) build.

Requirements

• iOS 8.0+ / Mac OS X 10.10+
• Xcode 6.1

Installation

Create a Cartfile that lists the frameworks you’d like to use in your project.

echo 'github "s-aska/KeyClip"' >> Cartfile

Run carthage update

carthage update

On your application targets’ “General” settings tab, in the “Embedded Binaries” section, drag and drop each framework you want to use from the Carthage/Build/(iOS|Mac) folder on disk.

Usage

String

KeyClip.save("access_token", string: "********") // -> Bool

let token = KeyClip.load("access_token") as String?

KeyClip.delete("access_token") // Remove the data

KeyClip.clear() // Remove all the data

KeyClip.exists("access_token") // -> Bool

NSDictionary

Must be compatible to NSJSONSerialization.

Valid JSON elements are Dictionary, Array, String, Number, Boolean and null.

KeyClip.save("account", dictionary: ["name": "aska", "token": "******"]) // -> Bool

let dictionary = KeyClip.load("account") as NSDictionary?

NSData

KeyClip.save("data", data: NSData()) // -> Bool

let data = KeyClip.load("data") as NSData?

Your Class

KeyClip.save("account", dictionary: account.dictionaryValue)

let account = KeyClip.load("account") { (dictionary) -> Account in
    return Account(dictionary)
}

class Account {
    let name: String
    let password: String

    init(_ dictionary: NSDictionary) {
        self.name = dictionary["name"] as String
        self.password = dictionary["password"] as String
    }

    var dictionaryValue: [String: String] {
        return ["name": name, "password": password]
    }
}

Error Handling

Return value

let success = KeyClip.save("password", string: "********")
if !success {
    // Show Alert "Saving password to keychain failed"
}

Clojure

KeyClip.save("password", string: "********") { error in
    let status = error.code // OSStatus
    // Show Alert "Saving failed \(error.localizedDescription)(\(error.code))"
}

Debug print

KeyClip.printError(true)

Settings

let clip = KeyClip.Builder()

    // kSecAttrService
    .service(NSBundle.mainBundle().bundleIdentifier) // default

    // kSecAttrAccessible
    .accessible(kSecAttrAccessibleAfterFirstUnlock) // default

    // kSecAttrAccessGroup
    .accessGroup("XXXX23F3DC53.com.example.share") // default is nil

    .build()

Note to accessGroup

⚠️ iOS Simulator's keychain implementation does not support kSecAttrAccessGroup. (always "test")

⚠️ kSecAttrAccessGroup must match the App Identifier prefix. https://developer.apple.com/library/mac/documentation/Security/Reference/keychainservices/index.html

How to check the App Identifier

Entitlement.plist's keychain-access-groups or App Identifier.

KeyClip.defaultAccessGroup() // -> String (eg. XXXX23F3DC53.*)

License

KeyClip is released under the MIT license. See LICENSE for details.