SecKeyUnwrapSymmetric(_:_:_:_:)

Declaration

func SecKeyUnwrapSymmetric(_ keyToUnwrap: UnsafeMutablePointer<Unmanaged<CFData>?>, _ unwrappingKey: SecKey, _ parameters: CFDictionary, _ error: UnsafeMutablePointer<Unmanaged<CFError>?>?) -> SecKey?

Parameters

• keyToUnwrap:

  The wrapped key to unwrap.

• unwrappingKey:

  The key that must be used to unwrap keyToUnwrap.

• parameters:

  A parameter list for the unwrapping process. This is usually either an empty dictionary or a dictionary containing a value for Ksecattrsalt.

• error:

  A pointer to a Cferror variable where an error object is stored upon failure. If not NULL, the caller is responsible for checking this variable and releasing the resulting object if it exists.

Return Value

The unwrapped key, or NULL on failure. In Objective-C, call the CFRelease function to free the key’s memory when you are done with it.