System/Library/PrivateFrameworks/SecurityFoundation.framework

SFECDHKeySource_Ivars.h

NSObject

@class _SFECKeyPair, _SFECPublicKey;

@interface SFECDHKeySource_Ivars : NSObject {
    _SFECKeyPair *localKeyPair;
    _SFECPublicKey *remotePublicKey;
}

- (void).cxx_destruct;

@end