Section owner_closeIsSecure.
intros s t Sub FP5 SS TF; inversion TF.
inversion H.
unfold SecureState in |- *.
BreakSS.
split.
unfold DACSecureState in |- *; intros; simpl in |- *.
elim (OBJeq_dec o o0); intro y0.
rewrite <- y0.
cut (fsecmat (secmat s) o = None -> fsecmat (ownerclose_sm s u o) o = None).
cut
match fsecmat (ownerclose_sm s u o) o, fsecmat (secmat s) o with
| _, None => False
| None, Some z => True
| Some y, Some z =>
(set_In u0 (ActReaders y) -> set_In u0 (ActReaders z)) /\
(set_In u0 (ActWriters y) -> set_In u0 (ActWriters z))
end.
cut
match fsecmat (secmat s) o with
| None => True
| Some y =>
(set_In u0 (ActReaders y) -> PreDACRead s u0 o) /\
(set_In u0 (ActWriters y) -> PreDACWrite s u0 o)
end.
unfold PreDACRead, PreDACWrite in |- *; simpl in |- *;
elim (fsecmat (secmat s) o); elim (fsecmat (ownerclose_sm s u o) o);
intros; contradiction || auto.
tauto.
unfold DACSecureState in DAC; apply DAC.
apply OwnerClose_smCorr2; auto.
auto.
unfold PreDACRead, PreDACWrite in |- *; simpl in |- *.
replace (fsecmat (ownerclose_sm s u o) o0) with (fsecmat (secmat s) o0).
unfold DACSecureState, PreDACRead, PreDACWrite in DAC; apply DAC.
auto.
unfold MACSecureState in |- *; intros; simpl in |- *.
elim (OBJeq_dec o o0); intro y0.
rewrite <- y0.
cut
match fsecmat (ownerclose_sm s u o) o, fsecmat (secmat s) o with
| _, None => False
| None, Some z => True
| Some y, Some z =>
(set_In u0 (ActReaders y) -> set_In u0 (ActReaders z)) /\
(set_In u0 (ActWriters y) -> set_In u0 (ActWriters z))
end.
cut
match fsecmat (secmat s) o, fOSC (objectSC s) o, fSSC (subjectSC s) u0 with
| None, _, _ => True
| _, None, _ => True
| _, _, None => True
| Some x, Some y, Some z =>
set_In u0 (ActReaders x) \/ set_In u0 (ActWriters x) -> le_sc y z
end.
elim (fsecmat (secmat s) o); elim (fsecmat (ownerclose_sm s u o) o);
elim (fOSC (objectSC s) o); elim (fSSC (subjectSC s) u0);
contradiction || auto.
tauto.
unfold MACSecureState in MAC; apply MAC.
apply OwnerClose_smCorr2; auto.
auto.
replace (fsecmat (ownerclose_sm s u o) o0) with (fsecmat (secmat s) o0).
unfold MACSecureState in MAC; apply MAC.
auto.
Qed.

Lemma Owner_ClosePSP :
forall (s t : SFSstate) (u : SUBJECT),
FuncPre5 s ->
StarProperty s -> TransFunc u s Owner_Close t -> StarProperty t.