Keychain Attribute Keys
Keychains are stored much like NSDictionaries; however, they have very specific keys that can be associated with them. Unlike an NSDictionary, a Keychain cannot use any random string for a key value. Each Keychain is associated with a Keychain Class; if using Apple’s KeychainItemWrapper, it defaults to using CFTypeRef kSecClassGenericPassword. However, other options exist for kSecClassInternetPassword, kSecClassCertificate, kSecClassKey, and kSecClassIdentity. Each class has different associated values attached to it. For the purposes of this chapter as well as for the KeychainItemWrapper, the focus will be on kSecClassGenericPassword.
kSecClassGenericPassword contains 14 possible keys for storing and accessing data, as ...
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