pub unsafe static kSecReturnData: &'static CFStringSecItem only.Expand description
Predefined return type keys used to set values in a dictionary. You use these keys to specify the type of results which should be returned by the SecItemCopyMatching or SecItemAdd function. You can specify zero or more of these return types. If more than one of these result types is specified, the result is returned as a CFDictionaryRef whose keys are the result types and values are the requested data.
CFBooleanRef. A value of kCFBooleanTrue indicates that the data of an item (CFDataRef) should be returned. For keys and password items, data is secret (encrypted) and may require the user to enter a password for access.
of type CFBooleanRef. A value of kCFBooleanTrue indicates that the (non-encrypted) attributes of an item (CFDictionaryRef) should be returned.
CFBooleanRef. A value of kCFBooleanTrue indicates that a reference should be returned. Depending on the item class requested, the returned reference(s) may be of type SecKeychainItemRef, SecKeyRef, SecCertificateRef, or SecIdentityRef. Note that returning references is supported only for Certificate, Key or Identity items on iOS, watchOS and tvOS. Similarly, returning references is supported only for Certificate, Key or Identity items on macOS when either kSecUseDataProtectionKeychain is set to true or kSecAttrSynchronizable is set to true.
is of type CFBooleanRef. A value of kCFBooleanTrue indicates that a persistent reference to an item (CFDataRef) should be returned.
See also Apple’s documentation