Verification: oscstat |
Require ModelProperties.
Require AuxiliaryLemmas.
Section oscstatIsSecure.
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Lemma OscstatPSS:
(s,t:SFSstate; u:SUBJECT)
(SecureState s)->(TransFunc u s Oscstat t)->(SecureState t).
OpDontChangeStPSS.
Qed.
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Lemma OscstatPSP:
(s,t:SFSstate; u:SUBJECT)
(StarProperty s)->(TransFunc u s Oscstat t)->(StarProperty t).
OpDontChangeStPSP.
Qed.
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Lemma OscstatPCP:
(s,t:SFSstate)(PreservesControlProp s Oscstat 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 oscstatIsSecure.
Hints Resolve OscstatPSS OscstatPSP OscstatPCP.