exile.h/test.c

184 rivejä
4.1 KiB
C
Raaka Normaali näkymä Historia

2021-06-05 14:07:11 +02:00
#include "qssb.h"
#include <stdbool.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/socket.h>
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int test_default_main(int argc, char *argv[])
{
struct qssb_policy *policy = qssb_init_policy();
int ret = qssb_enable_policy(policy);
return ret;
}
int test_seccomp_blacklisted(int argc, char *argv[])
{
struct qssb_policy *policy = qssb_init_policy();
qssb_append_syscall_policy(policy, QSSB_SYSCALL_DENY_KILL_PROCESS, QSSB_SYS(getuid));
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int ret = qssb_enable_policy(policy);
uid_t pid = geteuid();
pid = getuid();
return 0;
}
int test_seccomp_blacklisted_call_permitted(int argc, char *argv[])
{
struct qssb_policy *policy = qssb_init_policy();
qssb_append_syscall_policy(policy, QSSB_SYSCALL_DENY_KILL_PROCESS, QSSB_SYS(getuid));
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int ret = qssb_enable_policy(policy);
//geteuid is not blacklisted, so must succeed
uid_t pid = geteuid();
return 0;
}
int test_seccomp_x32_kill(int argc, char *argv[])
{
struct qssb_policy *policy = qssb_init_policy();
qssb_append_syscall_policy(policy, QSSB_SYSCALL_DENY_KILL_PROCESS, QSSB_SYS(getuid));
int ret = qssb_enable_policy(policy);
/* Attempt to bypass by falling back to x32 should be blocked */
qssb_append_syscall_policy(policy, QSSB_SYSCALL_DENY_KILL_PROCESS, QSSB_SYS(getuid)+__X32_SYSCALL_BIT);
return 0;
}
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int test_landlock(int argc, char *argv[])
{
struct qssb_policy *policy = qssb_init_policy();
qssb_append_path_policy(policy, QSSB_FS_ALLOW_READ, "/proc/self/fd");
int ret = qssb_enable_policy(policy);
int fd = open("/", O_RDONLY | O_CLOEXEC);
if(fd < 0)
{
return 0;
}
return 1;
}
int test_landlock_deny_write(int argc, char *argv[])
{
struct qssb_policy *policy = qssb_init_policy();
qssb_append_path_policy(policy, QSSB_FS_ALLOW_READ, "/tmp/");
int ret = qssb_enable_policy(policy);
int fd = open("/tmp/a", O_WRONLY | O_CLOEXEC);
if(fd < 0)
{
return 0;
}
return 1;
}
int test_nofs(int argc, char *argv[])
{
struct qssb_policy *policy = qssb_init_policy();
policy->no_fs = 1;
int ret = qssb_enable_policy(policy);
if(ret != 0)
{
fprintf(stderr, "Failed to activate nofs sandbox\n");
return -1;
}
int s = socket(AF_INET,SOCK_STREAM,0);
if(s == -1)
{
fprintf(stderr, "Failed to open socket but this was not requested by policy\n");
return 0;
}
/* Expect seccomp to take care of this */
if(open("/test", O_CREAT | O_WRONLY) >= 0)
{
fprintf(stderr, "Failed: Do not expect write access\n");
return -1;
}
return 0;
}
int test_no_new_fds(int argc, char *argv[])
{
struct qssb_policy *policy = qssb_init_policy();
policy->no_new_fds = 1;
int ret = qssb_enable_policy(policy);
if(ret != 0)
{
fprintf(stderr, "Failed to activate no_new_fd sandbox\n");
return -1;
}
if(open("/tmp/test", O_CREAT | O_WRONLY) >= 0)
{
fprintf(stderr, "Failed: Could open new file descriptor\n");
return -1;
}
int s = socket(AF_INET,SOCK_STREAM,0);
if(s >= 0)
{
fprintf(stderr, "Failed: socket got opened but policy denied\n");
return -1;
}
return 0;
}
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struct dispatcher
{
char *name;
int (*f)(int, char **);
bool must_exit_zero;
};
struct dispatcher dispatchers[] = {
{ "default", &test_default_main, true },
{ "seccomp-blacklisted", &test_seccomp_blacklisted, false },
{ "seccomp-blacklisted-permitted", &test_seccomp_blacklisted_call_permitted, true },
{ "seccomp-x32-kill", &test_seccomp_x32_kill, false},
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{ "landlock", &test_landlock, true },
{ "landlock-deny-write", &test_landlock_deny_write, true },
{ "no_fs", &test_nofs, false},
{ "no_new_fds", &test_no_new_fds, true}
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};
int main(int argc, char *argv[])
{
if(argc < 2)
{
fprintf(stderr, "Usage: %s [testname]\n", argv[0]);
return EXIT_FAILURE;
}
char *test = argv[1];
if(strcmp(test, "--dumptests") == 0)
{
for(unsigned int i = 0; i < sizeof(dispatchers)/sizeof(dispatchers[0]); i++)
{
printf("%s:%i\n", dispatchers[i].name, dispatchers[i].must_exit_zero ? 1 : 0);
}
return EXIT_SUCCESS;
}
for(unsigned int i = 0; i < sizeof(dispatchers)/sizeof(dispatchers[0]); i++)
{
struct dispatcher *current = &dispatchers[i];
if(strcmp(current->name, test) == 0)
{
return current->f(argc, argv);
}
}
fprintf(stderr, "Unknown test\n");
return EXIT_FAILURE;
}