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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/capability.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
/*
* tests for cap_launch.
*/
#define MORE_THAN_ENOUGH 20
#define NO_MORE 1
struct test_case_s {
int pass_on;
const char *chroot;
uid_t uid;
gid_t gid;
int ngroups;
const gid_t groups[MORE_THAN_ENOUGH];
const char *args[MORE_THAN_ENOUGH];
const char **envp;
const char *iab;
cap_mode_t mode;
int launch_abort;
int result;
int (*callback_fn)(void *detail);
};
#ifdef WITH_PTHREADS
#include <pthread.h>
#else /* WITH_PTHREADS */
#endif /* WITH_PTHREADS */
/*
* clean_out drops all process capabilities.
*/
static int clean_out(void *data) {
cap_t empty;
empty = cap_init();
if (cap_set_proc(empty) != 0) {
_exit(1);
}
cap_free(empty);
return 0;
}
int main(int argc, char **argv) {
static struct test_case_s vs[] = {
{
.args = { "../progs/tcapsh-static", "--", "-c", "echo hello" },
.result = 0
},
{
.args = { "../progs/tcapsh-static", "--", "-c", "echo hello" },
.callback_fn = &clean_out,
.result = 0
},
{
.callback_fn = &clean_out,
.result = 0
},
{
.args = { "../progs/tcapsh-static", "--is-uid=123" },
.result = 256
},
{
.args = { "/", "won't", "work" },
.launch_abort = 1,
},
{
.args = { "../progs/tcapsh-static", "--is-uid=123" },
.uid = 123,
.result = 0,
},
{
.args = { "../progs/tcapsh-static", "--is-uid=123" },
.callback_fn = &clean_out,
.uid = 123,
.launch_abort = 1,
},
{
.args = { "../progs/tcapsh-static", "--is-gid=123" },
.result = 0,
.gid = 123,
.ngroups = 1,
.groups = { 456 },
.iab = "",
},
{
.args = { "../progs/tcapsh-static", "--dropped=cap_chown",
"--has-i=cap_chown" },
.result = 0,
.iab = "!%cap_chown"
},
{
.args = { "../progs/tcapsh-static", "--dropped=cap_chown",
"--has-i=cap_chown", "--is-uid=234",
"--has-a=cap_chown", "--has-p=cap_chown" },
.uid = 234,
.result = 0,
.iab = "!^cap_chown"
},
{
.args = { "../progs/tcapsh-static", "--inmode=NOPRIV",
"--has-no-new-privs" },
.result = 0,
.mode = CAP_MODE_NOPRIV
},
{
.args = { "/noop" },
.result = 0,
.chroot = ".",
},
{
.pass_on = NO_MORE
},
};
if (errno != 0) {
perror("unexpected initial value for errno");
exit(1);
}
cap_t orig = cap_get_proc();
if (orig == NULL) {
perror("failed to get process capabilities");
exit(1);
}
int success = 1, i;
for (i=0; vs[i].pass_on != NO_MORE; i++) {
cap_launch_t attr = NULL;
const struct test_case_s *v = &vs[i];
if (cap_launch(attr, NULL) != -1) {
perror("NULL launch didn't fail");
exit(1);
}
printf("[%d] test should %s\n", i,
v->result || v->launch_abort ? "generate error" : "work");
if (v->args[0] != NULL) {
attr = cap_new_launcher(v->args[0], v->args, v->envp);
if (attr == NULL) {
perror("failed to obtain launcher");
exit(1);
}
if (v->callback_fn != NULL) {
cap_launcher_callback(attr, v->callback_fn);
}
} else {
attr = cap_func_launcher(v->callback_fn);
}
if (v->chroot) {
cap_launcher_set_chroot(attr, v->chroot);
}
if (v->uid) {
cap_launcher_setuid(attr, v->uid);
}
if (v->gid) {
cap_launcher_setgroups(attr, v->gid, v->ngroups, v->groups);
}
if (v->iab) {
cap_iab_t iab = cap_iab_from_text(v->iab);
if (iab == NULL) {
fprintf(stderr, "[%d] failed to decode iab [%s]", i, v->iab);
perror(":");
success = 0;
continue;
}
cap_iab_t old = cap_launcher_set_iab(attr, iab);
if (cap_free(old)) {
fprintf(stderr, "[%d] failed to decode iab [%s]", i, v->iab);
perror(":");
success = 0;
continue;
}
}
if (v->mode) {
cap_launcher_set_mode(attr, v->mode);
}
pid_t child = cap_launch(attr, NULL);
if (child <= 0) {
fprintf(stderr, "[%d] failed to launch: ", i);
perror("");
if (!v->launch_abort) {
success = 0;
}
continue;
}
if (cap_free(attr)) {
fprintf(stderr, "[%d] failed to free launcher: ", i);
perror("");
success = 0;
}
int result;
int ret = waitpid(child, &result, 0);
if (ret != child) {
fprintf(stderr, "[%d] failed to wait: ", i);
perror("");
success = 0;
continue;
}
if (result != v->result) {
fprintf(stderr, "[%d] bad result: got=%d want=%d: ", i, result,
v->result);
perror("");
success = 0;
continue;
}
}
cap_t final = cap_get_proc();
if (final == NULL) {
perror("unable to get final capabilities");
exit(1);
}
if (cap_compare(orig, final)) {
char *was = cap_to_text(orig, NULL);
char *is = cap_to_text(final, NULL);
printf("cap_launch_test: orig:'%s' != final:'%s'\n", was, is);
cap_free(is);
cap_free(was);
success = 0;
}
cap_free(final);
cap_free(orig);
if (!success) {
printf("cap_launch_test: FAILED\n");
exit(1);
}
printf("cap_launch_test: PASSED\n");
exit(0);
}
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