/usr/include/xsec/xkms/ is in libxml-security-c-dev 1.7.2-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/xsec/xkms/XKMSAuthentication.hpp
/usr/include/xsec/xkms/XKMSCompoundRequest.hpp
/usr/include/xsec/xkms/XKMSCompoundResult.hpp
/usr/include/xsec/xkms/XKMSConstants.hpp
/usr/include/xsec/xkms/XKMSKeyBinding.hpp
/usr/include/xsec/xkms/XKMSKeyBindingAbstractType.hpp
/usr/include/xsec/xkms/XKMSLocateRequest.hpp
/usr/include/xsec/xkms/XKMSLocateResult.hpp
/usr/include/xsec/xkms/XKMSMessageAbstractType.hpp
/usr/include/xsec/xkms/XKMSMessageFactory.hpp
/usr/include/xsec/xkms/XKMSNotBoundAuthentication.hpp
/usr/include/xsec/xkms/XKMSPendingRequest.hpp
/usr/include/xsec/xkms/XKMSPrototypeKeyBinding.hpp
/usr/include/xsec/xkms/XKMSQueryKeyBinding.hpp
/usr/include/xsec/xkms/XKMSRSAKeyPair.hpp
/usr/include/xsec/xkms/XKMSRecoverKeyBinding.hpp
/usr/include/xsec/xkms/XKMSRecoverRequest.hpp
/usr/include/xsec/xkms/XKMSRecoverResult.hpp
/usr/include/xsec/xkms/XKMSRegisterRequest.hpp
/usr/include/xsec/xkms/XKMSRegisterResult.hpp
/usr/include/xsec/xkms/XKMSReissueKeyBinding.hpp
/usr/include/xsec/xkms/XKMSReissueRequest.hpp
/usr/include/xsec/xkms/XKMSReissueResult.hpp
/usr/include/xsec/xkms/XKMSRequestAbstractType.hpp
/usr/include/xsec/xkms/XKMSRespondWith.hpp
/usr/include/xsec/xkms/XKMSResponseMechanism.hpp
/usr/include/xsec/xkms/XKMSResult.hpp
/usr/include/xsec/xkms/XKMSResultType.hpp
/usr/include/xsec/xkms/XKMSRevokeKeyBinding.hpp
/usr/include/xsec/xkms/XKMSRevokeRequest.hpp
/usr/include/xsec/xkms/XKMSRevokeResult.hpp
/usr/include/xsec/xkms/XKMSStatus.hpp
/usr/include/xsec/xkms/XKMSStatusRequest.hpp
/usr/include/xsec/xkms/XKMSStatusResult.hpp
/usr/include/xsec/xkms/XKMSUnverifiedKeyBinding.hpp
/usr/include/xsec/xkms/XKMSUseKeyWith.hpp
/usr/include/xsec/xkms/XKMSValidateRequest.hpp
/usr/include/xsec/xkms/XKMSValidateResult.hpp
/usr/include/xsec/xkms/XKMSValidityInterval.hpp