| author | chunhan |
| Thu, 12 Sep 2013 18:23:38 +0800 | |
| changeset 45 | d7fab2e2a0b8 |
| parent 44 | 563194dcdbc6 |
| child 46 | f66d61f5439d |
| permissions | -rw-r--r-- |
| 32 | 1 |
(*<*) |
2 |
theory S2ss_prop |
|
3 |
imports Main Flask Flask_type Static Static_type Init_prop Tainted_prop Valid_prop Alive_prop Co2sobj_prop |
|
4 |
begin |
|
5 |
(*>*) |
|
6 |
||
|
33
6884b3c9284b
fix bug of static.thy for the static of recvmsg case
chunhan
parents:
32
diff
changeset
|
7 |
context tainting_s begin |
|
6884b3c9284b
fix bug of static.thy for the static of recvmsg case
chunhan
parents:
32
diff
changeset
|
8 |
|
| 41 | 9 |
(* simpset for s2ss*) |
| 39 | 10 |
|
| 43 | 11 |
lemma co2sobj_some_case: |
12 |
"\<lbrakk>co2sobj s obj = Some sobj; \<And> p. obj = O_proc p \<Longrightarrow> P (O_proc p); |
|
13 |
\<And> f. obj = O_file f \<Longrightarrow> P (O_file f); \<And> h. obj = O_shm h \<Longrightarrow> P (O_shm h); |
|
14 |
\<And> f. obj = O_dir f \<Longrightarrow> P (O_dir f); \<And> q. obj = O_msgq q \<Longrightarrow> P (O_msgq q)\<rbrakk> |
|
15 |
\<Longrightarrow> P obj" |
|
16 |
by (case_tac obj, auto) |
|
17 |
||
18 |
lemma co2sobj_execve_alive: |
|
19 |
"\<lbrakk>alive s obj; co2sobj s obj = Some x; valid (Execve p f fds # s)\<rbrakk> |
|
20 |
\<Longrightarrow> alive (Execve p f fds # s) obj" |
|
21 |
apply (erule co2sobj_some_case) |
|
22 |
by (auto simp:alive_simps simp del:alive.simps) |
|
| 39 | 23 |
|
|
33
6884b3c9284b
fix bug of static.thy for the static of recvmsg case
chunhan
parents:
32
diff
changeset
|
24 |
lemma s2ss_execve: |
| 34 | 25 |
"valid (Execve p f fds # s) \<Longrightarrow> s2ss (Execve p f fds # s) = ( |
26 |
if (\<exists> p'. p' \<noteq> p \<and> p' \<in> current_procs s \<and> co2sobj s (O_proc p') = co2sobj s (O_proc p)) |
|
|
35
f2e620d799cf
in the middle of building simpset for co2sobj, therefore we can deal with s2ss
chunhan
parents:
34
diff
changeset
|
27 |
then (case (cp2sproc (Execve p f fds # s) p) of |
|
f2e620d799cf
in the middle of building simpset for co2sobj, therefore we can deal with s2ss
chunhan
parents:
34
diff
changeset
|
28 |
Some sp \<Rightarrow> s2ss s \<union> {S_proc sp (O_proc p \<in> Tainted s \<or> O_file f \<in> Tainted s)}
|
| 43 | 29 |
| _ \<Rightarrow> {} )
|
30 |
else (case (cp2sproc (Execve p f fds # s) p, cp2sproc s p) of |
|
31 |
(Some sp, Some sp') \<Rightarrow> s2ss s - {S_proc sp' (O_proc p \<in> Tainted s)}
|
|
32 |
\<union> {S_proc sp (O_proc p \<in> Tainted s \<or> O_file f \<in> Tainted s)}
|
|
33 |
| _ \<Rightarrow> {} ) )"
|
|
|
35
f2e620d799cf
in the middle of building simpset for co2sobj, therefore we can deal with s2ss
chunhan
parents:
34
diff
changeset
|
34 |
apply (frule vd_cons, frule vt_grant_os, simp split:if_splits) |
| 42 | 35 |
|
| 41 | 36 |
apply (rule conjI, rule impI, (erule exE|erule conjE)+) |
37 |
apply (frule_tac p = p in current_proc_has_sp, simp, erule exE) |
|
38 |
apply (frule_tac p = p' in current_proc_has_sp, simp, erule exE, simp) |
|
39 |
apply (subgoal_tac "p \<in> current_procs (Execve p f fds # s)") |
|
40 |
apply (drule_tac p = p and s = "Execve p f fds # s" in current_proc_has_sp, simp) |
|
41 |
apply (erule exE, simp) |
|
42 |
apply (simp add:s2ss_def, rule set_eqI, rule iffI) |
|
43 |
apply (drule CollectD, (erule exE|erule conjE)+) |
|
44 |
apply (case_tac "obj = O_proc p") |
|
45 |
apply (simp add:co2sobj_execve tainted_eq_Tainted split:if_splits) |
|
| 42 | 46 |
apply (simp add:co2sobj_execve, rule disjI2) |
47 |
apply (rule_tac x = obj in exI, case_tac obj, (simp add:alive_simps)+)[1] |
|
48 |
apply (simp, erule disjE) |
|
49 |
apply (rule_tac x = "O_proc p" in exI, simp add:tainted_eq_Tainted) |
|
50 |
apply (erule exE| erule conjE)+ |
|
51 |
apply (case_tac "x = S_proc sp (O_proc p \<in> tainted s)") |
|
52 |
apply (rule_tac x = "O_proc p'" in exI) |
|
53 |
apply (simp add:alive_execve co2sobj_execve tainted_eq_Tainted cp2sproc_execve) |
|
| 43 | 54 |
apply (case_tac "obj = O_proc p", simp) |
55 |
apply (frule co2sobj_execve_alive, simp, simp) |
|
56 |
apply (frule_tac obj = obj in co2sobj_execve, simp) |
|
57 |
apply (rule_tac x = obj in exI, simp, simp) |
|
| 41 | 58 |
|
| 43 | 59 |
apply (erule conjE, frule current_proc_has_sp, simp, erule exE, rule impI, simp) |
60 |
apply (subgoal_tac "p \<in> current_procs (Execve p f fds # s)") |
|
61 |
apply (drule_tac p = p and s = "Execve p f fds # s" in current_proc_has_sp, simp) |
|
62 |
apply (erule exE, erule conjE, simp) |
|
63 |
apply (simp add:s2ss_def, rule set_eqI, rule iffI) |
|
64 |
apply (drule CollectD, (erule exE|erule conjE)+) |
|
65 |
apply (case_tac "obj = O_proc p", simp add:tainted_eq_Tainted) |
|
66 |
apply (rule disjI1, simp split:if_splits) |
|
| 41 | 67 |
apply (simp add:co2sobj_execve, rule disjI2) |
| 43 | 68 |
apply (rule conjI,rule_tac x = obj in exI, simp add:alive_simps split:t_object.splits) |
69 |
apply (rule notI, simp, case_tac obj) |
|
70 |
apply (erule_tac x = nat in allE, simp add:tainted_eq_Tainted, (simp split:option.splits)+) |
|
71 |
apply (erule disjE, simp) |
|
72 |
apply (rule_tac x = "O_proc p" in exI, simp add:tainted_eq_Tainted) |
|
73 |
apply (erule exE|erule conjE)+ |
|
74 |
apply (rule_tac x = obj in exI) |
|
75 |
apply (drule_tac obj = obj in co2sobj_execve_alive, simp+) |
|
76 |
apply (frule_tac obj = obj in co2sobj_execve, simp, simp) |
|
77 |
apply (rule impI, simp add:tainted_eq_Tainted, simp) |
|
78 |
done |
|
79 |
||
80 |
lemma s2ss_clone_alive: |
|
81 |
"\<lbrakk>co2sobj s obj = Some x; alive s obj; obj \<noteq> O_proc p'; valid (Clone p p' fds shms # s)\<rbrakk> |
|
82 |
\<Longrightarrow> alive (Clone p p' fds shms # s) obj" |
|
83 |
by (erule co2sobj_some_case, auto simp:alive_clone) |
|
84 |
||
85 |
lemma s2ss_clone: |
|
86 |
"valid (Clone p p' fds shms # s) \<Longrightarrow> s2ss (Clone p p' fds shms # s) = ( |
|
87 |
case (cp2sproc (Clone p p' fds shms # s) p') of |
|
88 |
Some sp \<Rightarrow> s2ss s \<union> {S_proc sp (O_proc p \<in> Tainted s)}
|
|
89 |
| _ \<Rightarrow> {})"
|
|
90 |
apply (frule vd_cons, frule vt_grant_os, split option.splits) |
|
91 |
apply (rule conjI, rule impI, drule current_proc_has_sp', simp, simp) |
|
92 |
apply (rule allI, rule impI, simp add:s2ss_def) |
|
93 |
apply (rule set_eqI, rule iffI, drule CollectD, (erule exE|erule conjE)+) |
|
94 |
apply (case_tac "obj = O_proc p'", simp add:tainted_eq_Tainted) |
|
95 |
apply (case_tac "O_proc p' \<in> Tainted s", drule Tainted_in_current, simp+) |
|
96 |
apply (rule disjI1, simp split:if_splits) |
|
97 |
apply (simp add:tainted_eq_Tainted, rule disjI2) |
|
98 |
apply (frule co2sobj_clone, simp) |
|
99 |
apply (rule_tac x = obj in exI, simp add:alive_simps split:t_object.splits) |
|
100 |
||
101 |
apply (simp, erule disjE, simp) |
|
102 |
apply (rule_tac x = "O_proc p'" in exI, simp add:tainted_eq_Tainted) |
|
103 |
apply (rule impI, rule notI, drule Tainted_in_current, simp+) |
|
104 |
apply (erule exE| erule conjE)+ |
|
105 |
apply (case_tac "obj = O_proc p'", simp) |
|
106 |
apply (rule_tac x = obj in exI) |
|
107 |
apply (frule s2ss_clone_alive, simp+) |
|
108 |
apply (auto simp:co2sobj_clone alive_simps) |
|
109 |
done |
|
110 |
||
111 |
definition update_s2ss_shm:: "t_state \<Rightarrow> t_process \<Rightarrow> t_static_state" |
|
112 |
where |
|
113 |
"update_s2ss_shm s pfrom \<equiv> s2ss s |
|
114 |
\<union> {S_proc sp True| sp p. info_flow_shm s pfrom p \<and> cp2sproc s p = Some sp}
|
|
115 |
- {S_proc sp False | sp p. info_flow_shm s pfrom p \<and> cp2sproc s p = Some sp \<and>
|
|
116 |
(\<not> (\<exists> p'. \<not> info_flow_shm s pfrom p' \<and> p' \<in> current_procs s \<and> |
|
117 |
cp2sproc s p' = Some sp \<and> O_proc p' \<notin> Tainted s))}" |
|
118 |
||
119 |
lemma Tainted_ptrace': |
|
120 |
"valid s \<Longrightarrow> Tainted (Ptrace p p' # s) = |
|
121 |
(if (O_proc p \<in> Tainted s \<and> O_proc p' \<notin> Tainted s) |
|
122 |
then Tainted s \<union> {O_proc p'' | p''. info_flow_shm s p' p''}
|
|
123 |
else if (O_proc p' \<in> Tainted s \<and> O_proc p \<notin> Tainted s) |
|
124 |
then Tainted s \<union> {O_proc p'' | p''. info_flow_shm s p p''}
|
|
125 |
else Tainted s)" |
|
126 |
using info_flow_shm_Tainted by auto |
|
127 |
||
128 |
lemma co2sobj_some_caseD: |
|
129 |
"\<lbrakk>co2sobj s obj = Some sobj; \<And> p. \<lbrakk>co2sobj s obj = Some sobj; obj = O_proc p\<rbrakk> \<Longrightarrow> P (O_proc p); |
|
130 |
\<And> f. \<lbrakk>co2sobj s obj = Some sobj; obj = O_file f\<rbrakk> \<Longrightarrow> P (O_file f); |
|
131 |
\<And> h. \<lbrakk>co2sobj s obj = Some sobj; obj = O_shm h\<rbrakk> \<Longrightarrow> P (O_shm h); |
|
132 |
\<And> f. \<lbrakk>co2sobj s obj = Some sobj; obj = O_dir f\<rbrakk> \<Longrightarrow> P (O_dir f); |
|
133 |
\<And> q. \<lbrakk>co2sobj s obj = Some sobj; obj = O_msgq q\<rbrakk> \<Longrightarrow> P (O_msgq q)\<rbrakk> |
|
134 |
\<Longrightarrow> P obj" |
|
135 |
by (case_tac obj, auto) |
|
136 |
||
137 |
lemma s2ss_ptrace1_aux: "x \<notin> {x. P x} \<Longrightarrow> \<not> P x" by simp
|
|
138 |
||
139 |
lemma s2ss_ptrace1: |
|
140 |
"\<lbrakk>valid (Ptrace p p' # s); O_proc p \<in> Tainted s; O_proc p' \<notin> Tainted s\<rbrakk> |
|
141 |
\<Longrightarrow> s2ss (Ptrace p p' # s) = update_s2ss_shm s p'" |
|
142 |
unfolding update_s2ss_shm_def s2ss_def |
|
143 |
apply (frule vd_cons, rule set_eqI, rule iffI) |
|
144 |
apply (drule CollectD, (erule exE|erule conjE)+) |
|
145 |
apply (erule co2sobj_some_caseD) |
|
146 |
apply (rule DiffI) |
|
147 |
apply (case_tac "O_proc pa \<in> Tainted s") |
|
148 |
apply (rule UnI1, simp, rule_tac x = "O_proc pa" in exI) |
|
149 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
150 |
apply (case_tac "info_flow_shm s p' pa") |
|
151 |
apply (rule UnI2, rule CollectI, simp only:co2sobj.simps split:option.splits) |
|
152 |
apply (drule current_proc_has_sp', simp, simp) |
|
153 |
apply (rule_tac x = a in exI, rule_tac x = pa in exI) |
|
154 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
155 |
apply (rule UnI1, simp) |
|
156 |
apply (rule_tac x = "O_proc pa" in exI) |
|
157 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
158 |
apply (rule notI, clarsimp simp:cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
159 |
apply (erule_tac x = pa in allE, simp) |
|
160 |
||
161 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI, |
|
162 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
163 |
apply (simp) |
|
164 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI, |
|
165 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
166 |
apply (simp split:option.splits) |
|
167 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI, |
|
168 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
169 |
apply (simp split:option.splits) |
|
170 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI, |
|
171 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
172 |
apply (simp split:option.splits) |
|
173 |
||
174 |
apply (erule DiffE, drule s2ss_ptrace1_aux, erule UnE) |
|
175 |
apply (erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
176 |
apply (erule co2sobj_some_caseD) |
|
177 |
apply (case_tac "O_proc pa \<in> Tainted s") |
|
178 |
apply (rule_tac x = "O_proc pa" in exI) |
|
179 |
apply (clarsimp simp add:tainted_eq_Tainted cp2sproc_other split:option.splits) |
|
180 |
apply (case_tac "info_flow_shm s p' pa", simp only:co2sobj.simps split:option.splits) |
|
181 |
apply (drule current_proc_has_sp', simp, simp) |
|
182 |
apply (drule Meson.not_exD, erule_tac x = a in allE, drule Meson.not_exD, erule_tac x = pa in allE) |
|
183 |
apply (simp add:tainted_eq_Tainted, (erule exE|erule conjE)+) |
|
184 |
apply (rule_tac x = "O_proc p'a" in exI) |
|
185 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
186 |
apply (rule_tac x = "O_proc pa" in exI) |
|
187 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
188 |
||
189 |
apply (rule_tac x = obj in exI, |
|
190 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
191 |
apply (rule_tac x = obj in exI, |
|
192 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
193 |
apply (rule_tac x = obj in exI, |
|
194 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
195 |
apply (rule_tac x = obj in exI, |
|
196 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
197 |
||
198 |
apply (erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
199 |
apply (rule_tac x = "O_proc pa" in exI) |
|
200 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted info_shm_flow_in_procs) |
|
201 |
done |
|
202 |
||
203 |
lemma s2ss_ptrace2: |
|
204 |
"\<lbrakk>valid (Ptrace p p' # s); O_proc p' \<in> Tainted s; O_proc p \<notin> Tainted s\<rbrakk> |
|
205 |
\<Longrightarrow> s2ss (Ptrace p p' # s) = update_s2ss_shm s p" |
|
206 |
unfolding update_s2ss_shm_def s2ss_def |
|
207 |
apply (frule vd_cons, rule set_eqI, rule iffI) |
|
208 |
apply (drule CollectD, (erule exE|erule conjE)+) |
|
209 |
apply (erule co2sobj_some_caseD) |
|
210 |
apply (rule DiffI) |
|
211 |
apply (case_tac "O_proc pa \<in> Tainted s") |
|
212 |
apply (rule UnI1, simp, rule_tac x = "O_proc pa" in exI) |
|
213 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
214 |
apply (case_tac "info_flow_shm s p pa") |
|
215 |
apply (rule UnI2, rule CollectI, simp only:co2sobj.simps split:option.splits) |
|
216 |
apply (drule current_proc_has_sp', simp, simp) |
|
217 |
apply (rule_tac x = a in exI, rule_tac x = pa in exI) |
|
218 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
219 |
apply (rule UnI1, simp) |
|
220 |
apply (rule_tac x = "O_proc pa" in exI) |
|
221 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
222 |
apply (rule notI, clarsimp simp:cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
223 |
apply (erule_tac x = pa in allE, simp) |
|
224 |
||
225 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI, |
|
226 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
227 |
apply (simp) |
|
228 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI, |
|
229 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
230 |
apply (simp split:option.splits) |
|
231 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI, |
|
232 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
233 |
apply (simp split:option.splits) |
|
234 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI, |
|
235 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
236 |
apply (simp split:option.splits) |
|
237 |
||
238 |
apply (erule DiffE, drule s2ss_ptrace1_aux, erule UnE) |
|
239 |
apply (erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
240 |
apply (erule co2sobj_some_caseD) |
|
241 |
apply (case_tac "O_proc pa \<in> Tainted s") |
|
242 |
apply (rule_tac x = "O_proc pa" in exI) |
|
243 |
apply (clarsimp simp add:tainted_eq_Tainted cp2sproc_other split:option.splits) |
|
244 |
apply (case_tac "info_flow_shm s p pa", simp only:co2sobj.simps split:option.splits) |
|
245 |
apply (drule current_proc_has_sp', simp, simp) |
|
246 |
apply (drule Meson.not_exD, erule_tac x = a in allE, drule Meson.not_exD, erule_tac x = pa in allE) |
|
247 |
apply (simp add:tainted_eq_Tainted, (erule exE|erule conjE)+) |
|
248 |
apply (rule_tac x = "O_proc p'a" in exI) |
|
249 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
250 |
apply (rule_tac x = "O_proc pa" in exI) |
|
251 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
252 |
||
253 |
apply (rule_tac x = obj in exI, |
|
254 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
255 |
apply (rule_tac x = obj in exI, |
|
256 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
257 |
apply (rule_tac x = obj in exI, |
|
258 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
259 |
apply (rule_tac x = obj in exI, |
|
260 |
auto split:option.splits simp:co2sobj_ptrace alive_simps simp del:co2sobj.simps)[1] |
|
261 |
||
262 |
apply (erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
263 |
apply (rule_tac x = "O_proc pa" in exI) |
|
264 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted info_shm_flow_in_procs) |
|
265 |
done |
|
266 |
||
267 |
lemma s2ss_ptrace3: |
|
268 |
"\<lbrakk>valid (Ptrace p p' # s); (O_proc p' \<in> Tainted s) = (O_proc p \<in> Tainted s)\<rbrakk> |
|
269 |
\<Longrightarrow> s2ss (Ptrace p p' # s) = s2ss s" |
|
270 |
unfolding s2ss_def |
|
271 |
apply (frule vd_cons, rule set_eqI, rule iffI) |
|
272 |
apply (erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
273 |
apply (rule_tac x = obj in exI) |
|
274 |
apply (frule alive_other, simp+) |
|
275 |
apply (frule_tac obj = obj in co2sobj_ptrace, simp) |
|
276 |
apply (auto simp add:tainted_eq_Tainted split:t_object.splits option.splits if_splits |
|
277 |
intro:info_flow_shm_Tainted)[1] |
|
278 |
||
279 |
apply (erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
280 |
apply (rule_tac x = obj in exI) |
|
281 |
apply (frule alive_other, simp+) |
|
282 |
apply (frule_tac obj = obj in co2sobj_ptrace, simp) |
|
283 |
apply (auto simp add:tainted_eq_Tainted split:t_object.splits option.splits if_splits |
|
284 |
intro:info_flow_shm_Tainted) |
|
285 |
done |
|
286 |
||
287 |
lemma s2ss_ptrace: |
|
288 |
"valid (Ptrace p p' # s) \<Longrightarrow> s2ss (Ptrace p p' # s) = ( |
|
289 |
if (O_proc p \<in> Tainted s \<and> O_proc p' \<notin> Tainted s) |
|
290 |
then update_s2ss_shm s p' |
|
291 |
else if (O_proc p' \<in> Tainted s \<and> O_proc p \<notin> Tainted s) |
|
292 |
then update_s2ss_shm s p |
|
293 |
else s2ss s )" |
|
294 |
apply (frule vt_grant_os, frule vd_cons) |
|
295 |
apply (simp add:s2ss_ptrace2 s2ss_ptrace1 split:if_splits) |
|
296 |
by (auto dest:s2ss_ptrace3) |
|
| 41 | 297 |
|
| 43 | 298 |
lemma s2ss_kill: |
299 |
"valid (Kill p p' # s) \<Longrightarrow> s2ss (Kill p p' # s) = ( |
|
300 |
if (\<exists> p''. p'' \<in> current_procs s \<and> p'' \<noteq> p' \<and> co2sobj s (O_proc p'') = co2sobj s (O_proc p')) |
|
301 |
then s2ss s |
|
302 |
else (case (co2sobj s (O_proc p')) of |
|
303 |
Some sp \<Rightarrow> s2ss s - {sp}
|
|
304 |
| _ \<Rightarrow> {}))"
|
|
305 |
apply (frule vt_grant_os, frule vd_cons) |
|
306 |
unfolding s2ss_def |
|
307 |
apply (simp split:if_splits, rule conjI) |
|
308 |
apply (rule impI, (erule exE|erule conjE)+) |
|
309 |
apply (split option.splits) |
|
310 |
apply (drule current_proc_has_sp', simp, simp) |
|
311 |
apply (simp split: option.splits, (erule conjE)+) |
|
312 |
apply (rule set_eqI, rule iffI, erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
313 |
apply (rule_tac x = obj in exI) |
|
314 |
apply (simp add:co2sobj_kill tainted_eq_Tainted alive_kill split:t_object.splits if_splits) |
|
315 |
apply (erule CollectE, erule exE, erule conjE, rule CollectI) |
|
316 |
apply (erule co2sobj_some_caseD) |
|
317 |
apply (case_tac "pa = p'") |
|
318 |
apply (rule_tac x = "O_proc p''" in exI) |
|
319 |
apply (simp add:cp2sproc_kill tainted_eq_Tainted alive_kill |
|
320 |
split:t_object.splits if_splits option.splits) |
|
321 |
apply (rule_tac x = "O_proc pa" in exI) |
|
322 |
apply (clarsimp simp add:cp2sproc_kill tainted_eq_Tainted alive_kill |
|
323 |
split:t_object.splits if_splits option.splits) |
|
324 |
apply (rule_tac x = obj in exI, frule alive_kill, simp add:co2sobj_kill del:co2sobj.simps)+ |
|
325 |
||
326 |
apply (rule impI, erule conjE, frule current_proc_has_sp, simp, erule exE, simp) |
|
327 |
apply (rule set_eqI, rule iffI) |
|
328 |
apply (erule CollectE, erule exE, erule conjE, rule DiffI) |
|
329 |
apply (rule CollectI, rule_tac x = obj in exI) |
|
330 |
apply (simp add:co2sobj_kill tainted_eq_Tainted alive_kill split:t_object.splits if_splits) |
|
331 |
apply (rule notI, simp, case_tac obj) |
|
332 |
apply (erule_tac x = nat in allE) |
|
333 |
apply (simp add:co2sobj_kill cp2sproc_kill tainted_eq_Tainted split:option.splits) |
|
334 |
apply (simp split:option.splits)+ |
|
335 |
apply (erule co2sobj_some_caseD) |
|
336 |
apply (case_tac "pa = p'") |
|
337 |
apply (rule_tac x = "O_proc p''" in exI) |
|
338 |
apply (simp add:cp2sproc_kill tainted_eq_Tainted alive_kill |
|
339 |
split:t_object.splits if_splits option.splits) |
|
340 |
apply (rule_tac x = "O_proc pa" in exI) |
|
341 |
apply (clarsimp simp add:cp2sproc_kill tainted_eq_Tainted alive_kill |
|
342 |
split:t_object.splits if_splits option.splits) |
|
343 |
apply (rule_tac x = obj in exI, frule alive_kill, simp add:co2sobj_kill del:co2sobj.simps)+ |
|
344 |
done |
|
345 |
||
346 |
lemma s2ss_exit: |
|
347 |
"valid (Exit p # s) \<Longrightarrow> s2ss (Exit p # s) = ( |
|
348 |
if (\<exists> p'. p' \<in> current_procs s \<and> p' \<noteq> p \<and> co2sobj s (O_proc p') = co2sobj s (O_proc p)) |
|
349 |
then s2ss s |
|
350 |
else (case (co2sobj s (O_proc p)) of |
|
351 |
Some sp \<Rightarrow> s2ss s - {sp}
|
|
352 |
| _ \<Rightarrow> {}))"
|
|
353 |
apply (frule vt_grant_os, frule vd_cons) |
|
354 |
unfolding s2ss_def |
|
355 |
apply (simp split:if_splits, rule conjI) |
|
356 |
apply (rule impI, (erule exE|erule conjE)+) |
|
357 |
apply (split option.splits) |
|
358 |
apply (drule current_proc_has_sp', simp, simp) |
|
359 |
apply (simp split: option.splits, (erule conjE)+) |
|
360 |
apply (rule set_eqI, rule iffI, erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
361 |
apply (rule_tac x = obj in exI) |
|
362 |
apply (simp add:co2sobj_exit tainted_eq_Tainted alive_exit split:t_object.splits if_splits) |
|
363 |
apply (erule CollectE, erule exE, erule conjE, rule CollectI) |
|
364 |
apply (erule co2sobj_some_caseD) |
|
365 |
apply (case_tac "pa = p") |
|
366 |
apply (rule_tac x = "O_proc p'" in exI) |
|
367 |
apply (simp add:cp2sproc_exit tainted_eq_Tainted alive_exit |
|
368 |
split:t_object.splits if_splits option.splits) |
|
369 |
apply (rule_tac x = "O_proc pa" in exI) |
|
370 |
apply (clarsimp simp add:cp2sproc_exit tainted_eq_Tainted alive_exit |
|
371 |
split:t_object.splits if_splits option.splits) |
|
372 |
apply (rule_tac x = obj in exI, frule alive_exit, simp add:co2sobj_exit del:co2sobj.simps)+ |
|
373 |
||
374 |
apply (rule impI, frule current_proc_has_sp, simp, erule exE, simp) |
|
375 |
apply (rule set_eqI, rule iffI) |
|
376 |
apply (erule CollectE, erule exE, erule conjE, rule DiffI) |
|
377 |
apply (rule CollectI, rule_tac x = obj in exI) |
|
378 |
apply (simp add:co2sobj_exit tainted_eq_Tainted alive_exit split:t_object.splits if_splits) |
|
379 |
apply (rule notI, simp, case_tac obj) |
|
380 |
apply (erule_tac x = nat in allE) |
|
381 |
apply (simp add:co2sobj_exit cp2sproc_exit tainted_eq_Tainted split:option.splits) |
|
382 |
apply (simp split:option.splits)+ |
|
383 |
apply (erule co2sobj_some_caseD) |
|
384 |
apply (case_tac "pa = p") |
|
385 |
apply (rule_tac x = "O_proc p'" in exI) |
|
386 |
apply (simp add:cp2sproc_exit tainted_eq_Tainted alive_exit |
|
387 |
split:t_object.splits if_splits option.splits) |
|
388 |
apply (rule_tac x = "O_proc pa" in exI) |
|
389 |
apply (clarsimp simp add:cp2sproc_exit tainted_eq_Tainted alive_exit |
|
390 |
split:t_object.splits if_splits option.splits) |
|
391 |
apply (rule_tac x = obj in exI, frule alive_exit, simp add:co2sobj_exit del:co2sobj.simps)+ |
|
392 |
done |
|
393 |
||
394 |
lemma alive_has_sobj': |
|
395 |
"\<lbrakk>co2sobj s obj = None; valid s\<rbrakk> \<Longrightarrow> \<not> alive s obj" |
|
396 |
apply (case_tac obj) |
|
397 |
apply (auto split:option.splits) |
|
398 |
oops |
|
399 |
||
400 |
declare co2sobj.simps [simp del] |
|
401 |
||
402 |
lemma co2sobj_open_none: |
|
403 |
"\<lbrakk>valid (Open p f flag fd None # s); alive s obj\<rbrakk> \<Longrightarrow> co2sobj (Open p f flag fd None # s) obj = ( |
|
404 |
if (obj = O_proc p) |
|
405 |
then (case (cp2sproc (Open p f flag fd None # s) p) of |
|
406 |
Some sp \<Rightarrow> Some (S_proc sp (O_proc p \<in> Tainted s)) |
|
407 |
| _ \<Rightarrow> None) |
|
408 |
else co2sobj s obj)" |
|
409 |
apply (frule vt_grant_os, frule vd_cons) |
|
410 |
apply (frule_tac obj = obj in co2sobj_open, simp add:alive_open) |
|
411 |
apply (auto split:t_object.splits option.splits dest!:current_proc_has_sp') |
|
412 |
done |
|
413 |
||
414 |
lemma co2sobj_open_some: |
|
415 |
"\<lbrakk>valid (Open p f flag fd (Some i) # s); alive s obj\<rbrakk> \<Longrightarrow> co2sobj (Open p f flag fd (Some i) # s) obj = ( |
|
416 |
if (obj = O_proc p) |
|
417 |
then (case (cp2sproc (Open p f flag fd (Some i) # s) p) of |
|
418 |
Some sp \<Rightarrow> Some (S_proc sp (O_proc p \<in> Tainted s)) |
|
419 |
| _ \<Rightarrow> None) |
|
420 |
else if (obj = O_file f) |
|
421 |
then (case (cf2sfile (Open p f flag fd (Some i) # s) f) of |
|
422 |
Some sf \<Rightarrow> Some (S_file {sf} (O_proc p \<in> Tainted s))
|
|
423 |
| _ \<Rightarrow> None) |
|
424 |
else co2sobj s obj)" |
|
425 |
apply (frule vt_grant_os, frule vd_cons) |
|
426 |
apply (frule_tac obj = obj in co2sobj_open, simp add:alive_open) |
|
427 |
apply (auto split:t_object.splits option.splits dest!:current_proc_has_sp') |
|
428 |
done |
|
| 41 | 429 |
|
| 43 | 430 |
lemma alive_co2sobj_some_open_none: |
431 |
"\<lbrakk>co2sobj s obj = Some sobj; alive s obj; valid (Open p f flag fd None # s)\<rbrakk> |
|
432 |
\<Longrightarrow> alive (Open p f flag fd None # s) obj" |
|
433 |
by (erule co2sobj_some_caseD, auto simp:alive_simps is_file_simps is_dir_simps) |
|
434 |
||
435 |
lemma alive_co2sobj_some_open_none': |
|
436 |
"\<lbrakk>co2sobj (Open p f flag fd None # s) obj = Some sobj; alive (Open p f flag fd None # s) obj; |
|
437 |
valid (Open p f flag fd None # s)\<rbrakk> \<Longrightarrow> alive s obj" |
|
438 |
by (erule co2sobj_some_caseD, auto simp:alive_simps is_file_simps is_dir_simps) |
|
439 |
||
440 |
lemma co2sobj_proc_obj: |
|
441 |
"\<lbrakk>co2sobj s obj = Some x; co2sobj s (O_proc p) = Some x\<rbrakk> |
|
442 |
\<Longrightarrow> \<exists> p'. obj = O_proc p'" |
|
443 |
by (case_tac obj, auto simp:co2sobj.simps split:option.splits) |
|
444 |
||
445 |
lemma s2ss_open_none: |
|
446 |
"valid (Open p f flag fd None # s) \<Longrightarrow> s2ss (Open p f flag fd None # s) = ( |
|
447 |
case (co2sobj s (O_proc p), co2sobj (Open p f flag fd None # s) (O_proc p)) of |
|
448 |
(Some sp, Some sp') \<Rightarrow> |
|
449 |
if (\<exists> p'. p' \<in> current_procs s \<and> p' \<noteq> p \<and> co2sobj s (O_proc p') = Some sp) |
|
450 |
then s2ss s \<union> {sp'}
|
|
451 |
else s2ss s - {sp} \<union> {sp'}
|
|
452 |
| _ \<Rightarrow> {} )"
|
|
453 |
unfolding s2ss_def |
|
454 |
apply (frule vt_grant_os, frule vd_cons) |
|
455 |
apply (case_tac "co2sobj s (O_proc p)", simp add:co2sobj.simps split:option.splits) |
|
456 |
apply (drule current_proc_has_sp', simp, simp) |
|
457 |
apply (case_tac "co2sobj (Open p f flag fd None # s) (O_proc p)") |
|
458 |
apply (simp add:co2sobj.simps split:option.splits) |
|
459 |
apply (drule current_proc_has_sp', simp, simp) |
|
460 |
apply (rule set_eqI, rule iffI, erule CollectE, erule exE, erule conjE, simp) |
|
461 |
apply (frule_tac obj = obj in alive_co2sobj_some_open_none', simp, simp) |
|
462 |
apply (rule conjI, rule impI, erule exE, (erule conjE)+) |
|
463 |
apply (rule Meson.disj_comm, rule disjCI, case_tac "obj = O_proc p", simp) |
|
464 |
apply (rule_tac x = obj in exI, simp add:co2sobj_open_none) |
|
465 |
apply (rule impI) |
|
466 |
apply (case_tac "obj = O_proc p", simp) |
|
467 |
apply (rule Meson.disj_comm, rule disjCI, rule conjI) |
|
468 |
apply (rule_tac x = obj in exI, simp add:co2sobj_open_none) |
|
469 |
apply (simp add:co2sobj_open_none split:option.splits) |
|
470 |
apply (rule notI) |
|
471 |
apply (frule co2sobj_proc_obj, simp, erule exE) |
|
472 |
apply (erule_tac x = p' in allE, simp) |
|
473 |
||
474 |
apply (simp split:if_splits) |
|
475 |
apply (erule disjE, rule_tac x = "O_proc p" in exI, simp) |
|
476 |
apply (erule exE, erule conjE, case_tac "obj = O_proc p") |
|
477 |
apply (rule_tac x = "O_proc p'" in exI, simp add:co2sobj_open_none) |
|
478 |
apply (rule_tac x = obj in exI, simp add:co2sobj_open_none alive_co2sobj_some_open_none) |
|
479 |
apply (erule disjE, rule_tac x = "O_proc p" in exI, simp) |
|
480 |
apply (erule conjE, erule exE, erule conjE, case_tac "obj = O_proc p") |
|
481 |
apply (rule_tac x = "O_proc p'" in exI, simp add:co2sobj_open_none) |
|
482 |
apply (rule_tac x = obj in exI, simp add:co2sobj_open_none alive_co2sobj_some_open_none) |
|
483 |
done |
|
484 |
||
485 |
lemma alive_co2sobj_some_open_some: |
|
486 |
"\<lbrakk>alive s obj; valid (Open p f flag fd (Some i) # s)\<rbrakk> |
|
487 |
\<Longrightarrow> alive (Open p f flag fd (Some i) # s) obj" |
|
488 |
by (case_tac obj, auto simp:alive_simps is_file_simps is_dir_simps) |
|
489 |
||
490 |
lemma alive_co2sobj_some_open_some': |
|
491 |
"\<lbrakk>co2sobj (Open p f flag fd (Some i) # s) obj = Some sobj; alive (Open p f flag fd (Some i) # s) obj; |
|
492 |
valid (Open p f flag fd (Some i) # s); obj \<noteq> O_file f\<rbrakk> \<Longrightarrow> alive s obj" |
|
493 |
by (erule co2sobj_some_caseD, auto simp:alive_simps is_file_simps is_dir_simps) |
|
494 |
||
495 |
lemma s2ss_open_some: |
|
496 |
"valid (Open p f flag fd (Some i) # s) \<Longrightarrow> s2ss (Open p f flag fd (Some i) # s) = ( |
|
497 |
case (co2sobj s (O_proc p), co2sobj (Open p f flag fd (Some i) # s) (O_proc p), |
|
498 |
co2sobj (Open p f flag fd (Some i) # s) (O_file f)) of |
|
499 |
(Some sp, Some sp', Some sf) \<Rightarrow> |
|
500 |
if (\<exists> p'. p' \<in> current_procs s \<and> p' \<noteq> p \<and> co2sobj s (O_proc p') = Some sp) |
|
501 |
then s2ss s \<union> {sp', sf}
|
|
502 |
else s2ss s - {sp} \<union> {sp', sf}
|
|
503 |
| _ \<Rightarrow> {} )"
|
|
504 |
unfolding s2ss_def |
|
505 |
apply (frule vt_grant_os, frule vd_cons) |
|
506 |
apply (case_tac "co2sobj s (O_proc p)", simp add:co2sobj.simps split:option.splits) |
|
507 |
apply (drule current_proc_has_sp', simp, simp) |
|
508 |
apply (case_tac "co2sobj (Open p f flag fd (Some i) # s) (O_proc p)") |
|
509 |
apply (simp add:co2sobj.simps split:option.splits) |
|
510 |
apply (drule current_proc_has_sp', simp, simp) |
|
511 |
apply (case_tac "co2sobj (Open p f flag fd (Some i) # s) (O_file f)") |
|
512 |
apply (simp add:co2sobj.simps split:option.splits) |
|
513 |
apply (clarsimp split del:if_splits) |
|
514 |
||
515 |
apply (rule set_eqI, rule iffI, erule CollectE, erule exE, erule conjE) |
|
516 |
apply (split if_splits, rule conjI, rule impI, erule exE, erule conjE, erule conjE) |
|
517 |
apply (case_tac "obj = O_proc p", simp, case_tac "obj = O_file f", simp) |
|
518 |
apply (rule UnI1, rule CollectI, rule_tac x = obj in exI) |
|
519 |
apply (frule_tac obj = obj in alive_co2sobj_some_open_some', simp+) |
|
520 |
apply (simp add:co2sobj_open split:t_object.splits) |
|
521 |
apply (rule impI, case_tac "obj = O_proc p", simp, case_tac "obj = O_file f", simp) |
|
522 |
apply (rule UnI1, rule DiffI, rule CollectI, rule_tac x = obj in exI) |
|
523 |
apply (frule_tac obj = obj in alive_co2sobj_some_open_some', simp+) |
|
524 |
apply (simp add:co2sobj_open split:t_object.splits) |
|
525 |
apply (frule_tac obj = obj in co2sobj_open_some, simp+) |
|
526 |
apply (simp add:alive_co2sobj_some_open_some', simp) |
|
527 |
apply (rule notI) |
|
528 |
apply (frule_tac obj = obj and p = p in co2sobj_proc_obj, simp+, erule exE) |
|
529 |
apply (erule_tac x = p' in allE, simp) |
|
530 |
||
531 |
apply (simp split:if_splits, erule disjE) |
|
532 |
apply (rule_tac x = "O_proc p" in exI, simp) |
|
533 |
apply (erule disjE, rule_tac x = "O_file f" in exI, simp add:is_file_simps) |
|
534 |
apply (erule exE, erule conjE) |
|
535 |
apply (case_tac "obj = O_proc p", simp) |
|
536 |
apply (rule_tac x = "O_proc p'" in exI, simp add:co2sobj_open_some) |
|
537 |
apply (case_tac "obj = O_file f", simp add:is_file_in_current) |
|
538 |
apply (rule_tac x = obj in exI, simp add:co2sobj_open_some alive_co2sobj_some_open_some) |
|
539 |
apply (erule disjE, rule_tac x = "O_proc p" in exI, simp) |
|
540 |
apply (erule disjE, rule_tac x = "O_file f" in exI, simp add:is_file_simps) |
|
541 |
apply (erule conjE, erule exE, erule conjE) |
|
542 |
apply (case_tac "obj = O_proc p", simp) |
|
543 |
apply (case_tac "obj = O_file f", simp add:is_file_in_current) |
|
544 |
apply (rule_tac x = obj in exI, simp add:co2sobj_open_some alive_co2sobj_some_open_some) |
|
545 |
done |
|
546 |
||
547 |
lemma s2ss_open: |
|
548 |
"valid (Open p f flag fd opt # s) \<Longrightarrow> s2ss (Open p f flag fd opt # s) = ( |
|
549 |
if opt = None |
|
550 |
then (case (co2sobj s (O_proc p), co2sobj (Open p f flag fd opt # s) (O_proc p)) of |
|
551 |
(Some sp, Some sp') \<Rightarrow> |
|
552 |
if (\<exists> p'. p' \<in> current_procs s \<and> p' \<noteq> p \<and> co2sobj s (O_proc p') = Some sp) |
|
553 |
then s2ss s \<union> {sp'}
|
|
554 |
else s2ss s - {sp} \<union> {sp'}
|
|
555 |
| _ \<Rightarrow> {} )
|
|
556 |
else (case (co2sobj s (O_proc p), co2sobj (Open p f flag fd opt # s) (O_proc p), |
|
557 |
co2sobj (Open p f flag fd opt # s) (O_file f)) of |
|
558 |
(Some sp, Some sp', Some sf) \<Rightarrow> |
|
559 |
if (\<exists> p'. p' \<in> current_procs s \<and> p' \<noteq> p \<and> co2sobj s (O_proc p') = Some sp) |
|
560 |
then s2ss s \<union> {sp', sf}
|
|
561 |
else s2ss s - {sp} \<union> {sp', sf}
|
|
562 |
| _ \<Rightarrow> {} ) )"
|
|
563 |
apply (case_tac opt) |
|
564 |
apply (simp add:s2ss_open_some s2ss_open_none)+ |
|
565 |
done |
|
566 |
||
| 44 | 567 |
lemma s2ss_readfile: |
568 |
"valid (ReadFile p fd # s) \<Longrightarrow> s2ss (ReadFile p fd # s) = ( |
|
569 |
case (file_of_proc_fd s p fd) of |
|
570 |
Some f \<Rightarrow> if (O_file f \<in> Tainted s) |
|
571 |
then update_s2ss_shm s p |
|
572 |
else s2ss s |
|
573 |
| _ \<Rightarrow> {})"
|
|
574 |
apply (frule vt_grant_os, frule vd_cons, clarsimp split:option.splits) |
|
575 |
apply (rule conjI, rule impI, rule impI, simp) |
|
576 |
unfolding update_s2ss_shm_def s2ss_def |
|
577 |
apply (rule set_eqI, rule iffI) |
|
578 |
apply (drule CollectD, (erule exE|erule conjE)+) |
|
579 |
apply (erule co2sobj_some_caseD) |
|
580 |
apply (rule DiffI) |
|
581 |
apply (case_tac "O_proc pa \<in> Tainted s") |
|
582 |
apply (rule UnI1, simp, rule_tac x = "O_proc pa" in exI) |
|
583 |
apply (clarsimp simp:cp2sproc_other tainted_eq_Tainted co2sobj.simps split:option.splits) |
|
584 |
apply (case_tac "info_flow_shm s p pa") |
|
585 |
apply (rule UnI2, rule CollectI, simp only:co2sobj.simps split:option.splits) |
|
586 |
apply (drule current_proc_has_sp', simp, simp) |
|
587 |
apply (rule_tac x = ab in exI, rule_tac x = pa in exI) |
|
588 |
apply (clarsimp simp:cp2sproc_other tainted_eq_Tainted split:option.splits) |
|
589 |
apply (rule UnI1, simp) |
|
590 |
apply (rule_tac x = "O_proc pa" in exI) |
|
591 |
apply (clarsimp simp:cp2sproc_other tainted_eq_Tainted co2sobj.simps split:option.splits) |
|
592 |
apply (rule notI, clarsimp simp:cp2sproc_other tainted_eq_Tainted co2sobj.simps split:option.splits) |
|
593 |
apply (erule_tac x = pa in allE, simp) |
|
594 |
||
595 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI) |
|
596 |
apply (simp add:alive_simps co2sobj_readfile, rule notI, clarsimp simp:co2sobj.simps) |
|
597 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI) |
|
598 |
apply (simp add:alive_simps co2sobj_readfile, rule notI, clarsimp simp:co2sobj.simps split:option.splits) |
|
599 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI) |
|
600 |
apply (simp add:alive_simps co2sobj_readfile, rule notI, clarsimp simp:co2sobj.simps split:option.splits) |
|
601 |
apply (rule DiffI, rule UnI1, rule CollectI, rule_tac x = obj in exI) |
|
602 |
apply (simp add:alive_simps co2sobj_readfile, rule notI, clarsimp simp:co2sobj.simps split:option.splits) |
|
603 |
||
604 |
apply (erule DiffE, drule s2ss_ptrace1_aux, erule UnE) |
|
605 |
apply (erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
606 |
apply (erule co2sobj_some_caseD) |
|
607 |
apply (case_tac "O_proc pa \<in> Tainted s") |
|
608 |
apply (rule_tac x = "O_proc pa" in exI) |
|
609 |
apply (clarsimp simp:tainted_eq_Tainted cp2sproc_other co2sobj.simps split:option.splits) |
|
610 |
apply (case_tac "info_flow_shm s p pa", simp only:co2sobj.simps split:option.splits) |
|
611 |
apply (drule current_proc_has_sp', simp, simp) |
|
612 |
apply (drule Meson.not_exD, erule_tac x = ab in allE, drule Meson.not_exD, erule_tac x = pa in allE) |
|
613 |
apply (simp add:tainted_eq_Tainted, (erule exE|erule conjE)+) |
|
614 |
apply (rule_tac x = "O_proc p'" in exI) |
|
615 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted co2sobj.simps split:option.splits) |
|
616 |
apply (rule_tac x = "O_proc pa" in exI) |
|
617 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted co2sobj.simps split:option.splits) |
|
618 |
||
619 |
apply (rule_tac x = obj in exI, |
|
620 |
auto split:option.splits simp:co2sobj_readfile alive_simps simp del:co2sobj.simps)[1] |
|
621 |
apply (rule_tac x = obj in exI, |
|
622 |
auto split:option.splits simp:co2sobj_readfile alive_simps simp del:co2sobj.simps)[1] |
|
623 |
apply (rule_tac x = obj in exI, |
|
624 |
auto split:option.splits simp:co2sobj_readfile alive_simps simp del:co2sobj.simps)[1] |
|
625 |
apply (rule_tac x = obj in exI, |
|
626 |
auto split:option.splits simp:co2sobj_readfile alive_simps simp del:co2sobj.simps)[1] |
|
627 |
||
628 |
apply (erule CollectE, (erule exE|erule conjE)+, rule CollectI) |
|
629 |
apply (rule_tac x = "O_proc pa" in exI) |
|
630 |
apply (clarsimp simp:Tainted_ptrace' cp2sproc_other tainted_eq_Tainted info_shm_flow_in_procs co2sobj.simps) |
|
631 |
||
632 |
||
633 |
apply (rule impI, rule impI) |
|
634 |
apply (rule set_eqI, rule iffI, erule CollectE, erule exE, erule conjE, rule CollectI) |
|
635 |
apply (rule_tac x = obj in exI, simp add:alive_simps co2sobj_readfile split:t_object.splits) |
|
636 |
apply (erule CollectE, erule exE, erule conjE, rule CollectI) |
|
637 |
apply (rule_tac x = obj in exI, simp add:alive_simps) |
|
638 |
apply (drule_tac obj = obj in co2sobj_readfile, simp) |
|
639 |
apply (simp split:t_object.splits) |
|
640 |
apply (simp add:co2sobj.simps)+ |
|
641 |
done |
|
| 41 | 642 |
|
| 45 | 643 |
lemma same_inode_files_prop9: |
644 |
"is_file s f \<Longrightarrow> f \<in> same_inode_files s f" |
|
645 |
by (simp add:same_inode_files_def) |
|
646 |
||
647 |
lemma cf2sfiles_prop: |
|
648 |
"\<lbrakk>f \<in> same_inode_files s f'; valid s\<rbrakk> \<Longrightarrow> cf2sfiles s f = cf2sfiles s f'" |
|
649 |
apply (auto simp:cf2sfiles_def) |
|
650 |
apply (rule_tac x = f'a in bexI, simp) |
|
651 |
apply (erule same_inode_files_prop4, simp) |
|
652 |
apply (rule_tac x = f'a in bexI, simp) |
|
653 |
apply (drule same_inode_files_prop5) |
|
654 |
apply (erule same_inode_files_prop4, simp) |
|
655 |
done |
|
656 |
||
657 |
lemma co2sobj_writefile_unchange: |
|
658 |
"\<lbrakk>valid (WriteFile p fd # s); alive s obj; file_of_proc_fd s p fd = Some f; |
|
659 |
O_proc p \<in> Tainted s \<longrightarrow> O_file f \<in> Tainted s\<rbrakk> |
|
660 |
\<Longrightarrow> co2sobj (WriteFile p fd # s) obj = co2sobj s obj" |
|
661 |
apply (frule vd_cons, frule co2sobj_writefile, simp, simp split:t_object.splits if_splits) |
|
662 |
apply (simp add:co2sobj.simps) |
|
663 |
apply (case_tac "O_proc p \<in> Tainted s") |
|
664 |
apply (simp add:tainted_eq_Tainted same_inodes_Tainted)+ |
|
665 |
done |
|
666 |
||
667 |
lemma s2ss_writefile: |
|
668 |
"valid (WriteFile p fd # s) \<Longrightarrow> s2ss (WriteFile p fd # s) = ( |
|
669 |
case (file_of_proc_fd s p fd) of |
|
670 |
Some f \<Rightarrow> if (O_proc p \<in> Tainted s \<and> O_file f \<notin> Tainted s) |
|
671 |
then (if (\<exists> f'. f' \<notin> same_inode_files s f \<and> is_file s f' \<and> |
|
672 |
co2sobj s (O_file f') = co2sobj s (O_file f)) |
|
673 |
then s2ss s \<union> {S_file (cf2sfiles s f) True}
|
|
674 |
else s2ss s - {S_file (cf2sfiles s f) False}
|
|
675 |
\<union> {S_file (cf2sfiles s f) True})
|
|
676 |
else s2ss s |
|
677 |
| _ \<Rightarrow> {})"
|
|
678 |
apply (frule vd_cons, frule vt_grant_os) |
|
679 |
apply (clarsimp split:option.splits) |
|
680 |
unfolding s2ss_def |
|
681 |
apply (rule conjI|rule impI|erule exE|erule conjE)+ |
|
682 |
apply (rule set_eqI, rule iffI, erule CollectE, erule exE, erule conjE) |
|
683 |
apply (frule_tac obj = obj in co2sobj_writefile, simp add:alive_other) |
|
684 |
apply (simp split:t_object.splits if_splits) |
|
685 |
apply (rule disjI2, rule_tac x= "O_proc nat" in exI, simp) |
|
686 |
apply (rule disjI1, simp add:cf2sfiles_prop) |
|
687 |
apply (rule disjI2, rule_tac x = obj in exI, simp add:is_file_simps) |
|
688 |
apply (simp add:co2sobj.simps) |
|
689 |
apply (rule disjI2, rule_tac x = obj in exI, simp add:is_dir_simps) |
|
690 |
apply (simp add:co2sobj.simps) |
|
691 |
apply (simp add:co2sobj.simps) |
|
692 |
apply (simp add:co2sobj.simps) |
|
693 |
apply (rule disjI2, rule_tac x = obj in exI, simp) |
|
694 |
apply (rule disjI2, rule_tac x = obj in exI, simp) |
|
695 |
apply (simp add:co2sobj.simps) |
|
696 |
||
697 |
apply (simp, erule disjE) |
|
698 |
apply (rule_tac x = "O_file aa" in exI, simp add:is_file_simps file_of_pfd_is_file) |
|
699 |
apply (frule_tac obj = "O_file aa" in co2sobj_writefile, simp add:file_of_pfd_is_file) |
|
700 |
apply (simp split:if_splits add:same_inode_files_def file_of_pfd_is_file) |
|
701 |
apply (erule exE, erule conjE) |
|
702 |
apply (erule_tac obj = obj in co2sobj_some_caseD) |
|
703 |
apply (rule_tac x = obj in exI, simp add:co2sobj_writefile) |
|
704 |
apply (case_tac "fa \<in> same_inode_files s aa") |
|
705 |
apply (frule_tac f = fa and f' = aa in cf2sfiles_prop, simp) |
|
706 |
apply (rule_tac x = "O_file f'" in exI, simp add:co2sobj_writefile is_file_simps) |
|
707 |
apply (rule conjI, rule impI, simp add:same_inode_files_prop5) |
|
708 |
apply (rule impI, simp add:co2sobj.simps tainted_eq_Tainted same_inodes_Tainted) |
|
709 |
apply (rule_tac x = "O_file fa" in exI, simp add:co2sobj_writefile is_file_simps) |
|
710 |
apply (rule impI, simp add:same_inode_files_prop5) |
|
711 |
apply (rule_tac x = obj in exI, simp add:co2sobj_writefile) |
|
712 |
apply (rule_tac x = obj in exI, simp add:co2sobj_writefile is_dir_simps) |
|
713 |
apply (rule_tac x = obj in exI, simp add:co2sobj_writefile) |
|
714 |
||
715 |
apply (rule impI, rule impI, simp, rule set_eqI, rule iffI, erule CollectE, (erule conjE|erule exE)+) |
|
716 |
apply (rule CollectI, rule_tac x = obj in exI, simp add:alive_simps) |
|
717 |
apply (simp add:co2sobj_writefile split:t_object.splits if_splits) |
|
718 |
apply (simp add:co2sobj.simps tainted_eq_Tainted same_inodes_Tainted) |
|
719 |
apply (case_tac "O_proc p \<in> Tainted s", simp, simp) |
|
720 |
apply (erule CollectE, (erule conjE|erule exE)+, rule CollectI) |
|
721 |
apply (rule_tac x = obj in exI) |
|
722 |
apply (simp add:co2sobj_writefile_unchange alive_simps) |
|
723 |
||
724 |
apply (rule impI| rule conjI|erule conjE)+ |
|
725 |
apply (rule set_eqI, rule iffI, erule CollectE, erule exE, erule conjE) |
|
726 |
apply (simp add:alive_simps co2sobj_writefile split:t_object.splits) |
|
727 |
apply (rule disjI2, rule conjI, rule_tac x = obj in exI, simp, |
|
728 |
rule notI, simp add:co2sobj.simps split:option.splits) |
|
729 |
apply (simp split:if_splits) |
|
730 |
apply (rule disjI1, simp add:cf2sfiles_prop) |
|
731 |
apply (rule disjI2, rule conjI, rule_tac x = obj in exI, simp) |
|
732 |
apply (rule notI, simp add:co2sobj.simps split:option.splits) |
|
733 |
apply (erule_tac x = list in allE, simp add:tainted_eq_Tainted same_inode_files_prop5) |
|
734 |
apply (simp add:co2sobj.simps) |
|
735 |
apply (rule disjI2, rule conjI, rule_tac x = obj in exI, simp, |
|
736 |
rule notI, simp add:co2sobj.simps split:option.splits) |
|
737 |
apply (simp add:co2sobj.simps) |
|
738 |
apply (simp add:co2sobj.simps) |
|
739 |
apply (simp add:co2sobj.simps) |
|
740 |
apply (rule disjI2, rule conjI, rule_tac x = obj in exI, simp, |
|
741 |
rule notI, simp add:co2sobj.simps split:option.splits) |
|
742 |
apply (rule disjI2, rule conjI, rule_tac x = obj in exI, simp, |
|
743 |
rule notI, simp add:co2sobj.simps split:option.splits) |
|
744 |
apply (simp add:co2sobj.simps) |
|
745 |
apply (simp) |
|
746 |
apply (erule disjE) |
|
747 |
apply (rule_tac x= "O_file aa" in exI, simp add:co2sobj_writefile alive_simps file_of_pfd_is_file) |
|
748 |
apply (rule impI, simp add:same_inode_files_def file_of_pfd_is_file) |
|
749 |
apply (erule exE|erule conjE)+ |
|
750 |
apply (erule co2sobj_some_caseD) |
|
751 |
apply (rule_tac x = obj in exI, simp add:co2sobj_writefile) |
|
752 |
apply (case_tac "fa \<in> same_inode_files s aa") |
|
753 |
apply (frule cf2sfiles_prop, simp, simp add:co2sobj.simps tainted_eq_Tainted same_inodes_Tainted) |
|
754 |
apply (rule_tac x = obj in exI, simp add:co2sobj_writefile is_file_simps) |
|
755 |
apply (rule impI, simp add:same_inode_files_prop5) |
|
756 |
apply (rule_tac x = obj in exI, simp add:co2sobj_writefile) |
|
757 |
apply (rule_tac x = obj in exI, simp add:co2sobj_writefile is_dir_simps) |
|
758 |
apply (rule_tac x = obj in exI, simp add:co2sobj_writefile) |
|
759 |
apply (rule impI, rule impI) |
|
760 |
||
761 |
apply (rule set_eqI, rule iffI, erule CollectE,erule exE,erule conjE,rule CollectI) |
|
762 |
apply (rule_tac x = obj in exI) |
|
763 |
apply (simp add:co2sobj_writefile_unchange alive_simps) |
|
764 |
apply (erule CollectE, erule exE, erule conjE) |
|
765 |
apply (rule CollectI, rule_tac x = obj in exI) |
|
766 |
apply (simp add:co2sobj_writefile_unchange alive_simps) |
|
767 |
done |
|
768 |
||
769 |
||
| 41 | 770 |
|
| 43 | 771 |
lemmas s2ss_simps = s2ss_execve s2ss_clone s2ss_ptrace s2ss_kill s2ss_exit s2ss_open |
| 45 | 772 |
s2ss_readfile s2ss_writefile |
|
35
f2e620d799cf
in the middle of building simpset for co2sobj, therefore we can deal with s2ss
chunhan
parents:
34
diff
changeset
|
773 |