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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sepol/policydb/services.h>
#include <sepol/sepol.h>
int main(int argc, char *argv[])
{
FILE *fp;
sepol_security_id_t oldsid, newsid, tasksid;
sepol_security_class_t tclass;
char *reason = NULL;
int ret;
if (argc != 6) {
printf("usage: %s policy oldcontext newcontext tclass taskcontext\n", argv[0]);
return 1;
}
fp = fopen(argv[1], "r");
if (!fp) {
fprintf(stderr, "Can't open policy %s: %s\n", argv[1], strerror(errno));
return 1;
}
if (sepol_set_policydb_from_file(fp) < 0) {
fprintf(stderr, "Error while processing policy %s: %s\n", argv[1], strerror(errno));
fclose(fp);
return 1;
}
fclose(fp);
if (sepol_context_to_sid(argv[2], strlen(argv[2]), &oldsid) < 0) {
fprintf(stderr, "Invalid old context %s\n", argv[2]);
return 1;
}
if (sepol_context_to_sid(argv[3], strlen(argv[3]), &newsid) < 0) {
fprintf(stderr, "Invalid new context %s\n", argv[3]);
return 1;
}
if (sepol_string_to_security_class(argv[4], &tclass) < 0) {
fprintf(stderr, "Invalid security class %s\n", argv[4]);
return 1;
}
if (sepol_context_to_sid(argv[5], strlen(argv[5]), &tasksid) < 0) {
fprintf(stderr, "Invalid task context %s\n", argv[5]);
return 1;
}
ret = sepol_validate_transition_reason_buffer(oldsid, newsid, tasksid, tclass, &reason, SHOW_GRANTED);
switch (ret) {
case 0:
printf("allowed\n");
ret = 0;
break;
case -EPERM:
printf("denied\n");
printf("%s\n", reason ? reason : "unknown - possible BUG()");
ret = 7;
break;
default:
printf("sepol_validate_transition_reason_buffer returned %d errno: %s\n", ret, strerror(errno));
ret = 1;
}
free(reason);
return ret;
}
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