Verification: readdir |
Require ModelProperties.
Require AuxiliaryLemmas.
Section readdirIsSecure.
|
|
Lemma ReaddirPSS:
(s,t:SFSstate; u:SUBJECT)
(SecureState s)->(TransFunc u s Readdir t)->(SecureState t).
OpDontChangeStPSS.
Qed.
|
|
Lemma ReaddirPSP:
(s,t:SFSstate; u:SUBJECT)
(StarProperty s)->(TransFunc u s Readdir t)->(StarProperty t).
OpDontChangeStPSP.
Qed.
|
|
Lemma ReaddirPCP:
(s,t:SFSstate)(PreservesControlProp s Readdir t).
Intros; Unfold PreservesControlProp; Intros Sub TF; Inversion TF;
Unfold ControlProperty.
Split.
Intros.
Split.
Intro.
Absurd (DACCtrlAttrHaveChanged t t o0); Auto.
Intro; Absurd (MACObjCtrlAttrHaveChanged t t o0); Auto.
Intros; Absurd (MACSubCtrlAttrHaveChanged t t u0); Auto.
Qed.
End readdirIsSecure.
Hints Resolve ReaddirPSS ReaddirPSP ReaddirPCP.