tequilaOS/platform_system_sepolicy
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Add a checkfc utility to check file_contexts validity and invoke it.

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Change-Id: I4b12dc3dcb432edbdf95dd3bc97f809912ce86d1
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
This commit is contained in:
Stephen Smalley 2012-10-02 12:46:37 -04:00 committed by Gerrit Code Review
parent 659aaced05
commit 01a58af194
2 changed files with 76 additions and 2 deletions
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20
Android.mk
View file

@ -45,6 +45,19 @@ $(LOCAL_BUILT_MODULE) : $(sepolicy_policy.conf) $(HOST_OUT_EXECUTABLES)/checkpol
$(hide) $(HOST_OUT_EXECUTABLES)/checkpolicy -M -c $(POLICYVERS) -o $@ $<
sepolicy_policy.conf :=
###################################
include $(CLEAR_VARS)
LOCAL_MODULE := checkfc
LOCAL_MODULE_TAGS := optional
LOCAL_C_INCLUDES += external/libsepol/include external/libselinux/include
LOCAL_SRC_FILES := checkfc.c
LOCAL_STATIC_LIBRARIES := libsepol libselinux
LOCAL_MODULE_CLASS := EXECUTABLES
include $(BUILD_HOST_EXECUTABLE)
##################################
include $(CLEAR_VARS)
@ -55,10 +68,13 @@ LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
include $(BUILD_SYSTEM)/base_rules.mk
ALL_FC_FILES := $(LOCAL_PATH)/file_contexts $(LOCAL_POLICY_FC)
file_contexts := $(intermediates)/file_contexts
$(file_contexts): $(LOCAL_PATH)/file_contexts $(LOCAL_POLICY_FC)
$(file_contexts): $(ALL_FC_FILES) sepolicy $(HOST_OUT_EXECUTABLES)/checkfc
@mkdir -p $(dir $@)
$(hide) m4 -s $^ > $@
$(hide) m4 -s $(ALL_FC_FILES) > $@
$(hide) $(HOST_OUT_EXECUTABLES)/checkfc $(TARGET_ROOT_OUT)/sepolicy $@
file_contexts :=

58
checkfc.c Normal file
View file

@ -0,0 +1,58 @@
#include <stdio.h>
#include <stdlib.h>
#include <sepol/sepol.h>
#include <selinux/selinux.h>
#include <selinux/label.h>
static int nerr;
static int validate(char **contextp)
{
char *context = *contextp;
if (sepol_check_context(context) < 0) {
nerr++;
return -1;
}
return 0;
}
int main(int argc, char **argv)
{
struct selinux_opt opts[] = {
{ SELABEL_OPT_VALIDATE, (void*)1 },
{ SELABEL_OPT_PATH, NULL }
};
FILE *fp;
struct selabel_handle *sehnd;
if (argc != 3) {
fprintf(stderr, "usage: %s policy file_contexts\n", argv[0]);
exit(1);
}
fp = fopen(argv[1], "r");
if (!fp) {
perror(argv[1]);
exit(2);
}
if (sepol_set_policydb_from_file(fp) < 0) {
fprintf(stderr, "Error loading policy from %s\n", argv[1]);
exit(3);
}
selinux_set_callback(SELINUX_CB_VALIDATE,
(union selinux_callback)&validate);
opts[1].value = argv[2];
sehnd = selabel_open(SELABEL_CTX_FILE, opts, 2);
if (!sehnd) {
fprintf(stderr, "Error loading file contexts from %s\n", argv[2]);
exit(4);
}
if (nerr) {
fprintf(stderr, "Invalid file contexts found in %s\n", argv[2]);
exit(5);
}
exit(0);
}