ccstools/kernel_test/ccs_new_file_test.c

/*
 * tomoyo_file_test.c
 *
 * Testing program for fs/tomoyo_file.c
 *
 * Copyright (C) 2005-2008  NTT DATA CORPORATION
 *
 * Version: 1.6.6-pre   2008/12/22
 *
 */
#include "include.h"

static int domain_fd = EOF;
static int exception_fd = EOF;
static const char *policy = "";
static char self_domain[4096] = "";

static int write_policy(void)
{
        FILE *fp;
        char buffer[8192];
        char *cp;
        int domain_found = 0;
        int policy_found = 0;
        memset(buffer, 0, sizeof(buffer));
        cp = "255-MAC_FOR_FILE=disabled\n";
        write(profile_fd, cp, strlen(cp));
        fp = fopen(proc_policy_domain_policy, "r");
        cp = "255-MAC_FOR_FILE=enforcing\n";
        write(profile_fd, cp, strlen(cp));
        write(domain_fd, policy, strlen(policy));
        write(domain_fd, "\n", 1);
        if (!fp) {
                printf("%s : BUG: policy read failed\n", policy);
                return 0;
        }
        while (fgets(buffer, sizeof(buffer) - 1, fp)) {
                cp = strchr(buffer, '\n');
                if (cp)
                        *cp = '\0';
                if (!strncmp(buffer, "<kernel>", 8))
                        domain_found = !strcmp(self_domain, buffer);
                if (domain_found) {
                        /* printf("<%s>\n", buffer); */
                        if (!strcmp(buffer, policy)) {
                                policy_found = 1;
                                break;
                        }
                }
        }
        fclose(fp);
        if (!policy_found) {
                printf("%s : BUG: policy write failed\n", policy);
                return 0;
        }
        errno = 0;
        return 1;
}

static void delete_policy(void)
{
        write(domain_fd, "delete ", 7);
        write(domain_fd, policy, strlen(policy));
        write(domain_fd, "\n", 1);
}

static void show_result(int result, char should_success)
{
        int err = errno;
        printf("%s : ", policy);
        if (should_success) {
                if (result != EOF)
                        printf("OK\n");
                else
                        printf("FAILED: %s\n", strerror(err));
        } else {
                if (result == EOF) {
                        if (err == EPERM)
                                printf("OK: Permission denied.\n");
                        else
                                printf("FAILED: %s\n", strerror(err));
                } else {
                        printf("BUG: didn't fail.\n");
                }
        }
}

static void create2(const char *pathname)
{
        const char *cp = "255-MAC_FOR_FILE=disabled\n";
        write(profile_fd, cp, strlen(cp));
        close(creat(pathname, 0600));
        cp = "255-MAC_FOR_FILE=enforcing\n";
        write(profile_fd, cp, strlen(cp));
        errno = 0;
}

static void mkdir2(const char *pathname)
{
        const char *cp = "255-MAC_FOR_FILE=disabled\n";
        write(profile_fd, cp, strlen(cp));
        mkdir(pathname, 0600);
        cp = "255-MAC_FOR_FILE=enforcing\n";
        write(profile_fd, cp, strlen(cp));
        errno = 0;
}

static void unlink2(const char *pathname)
{
        const char *cp = "255-MAC_FOR_FILE=disabled\n";
        write(profile_fd, cp, strlen(cp));
        unlink(pathname);
        cp = "255-MAC_FOR_FILE=enforcing\n";
        write(profile_fd, cp, strlen(cp));
        errno = 0;
}

static void rmdir2(const char *pathname)
{
        const char *cp = "255-MAC_FOR_FILE=disabled\n";
        write(profile_fd, cp, strlen(cp));
        rmdir(pathname);
        cp = "255-MAC_FOR_FILE=enforcing\n";
        write(profile_fd, cp, strlen(cp));
        errno = 0;
}

static void stage_file_test(void)
{
        char *filename = "";
        policy = "allow_read /proc/sys/net/ipv4/ip_local_port_range "
                "if task.uid=0 task.gid=0";
        if (write_policy()) {
                static int name[] = { CTL_NET, NET_IPV4,
                                      NET_IPV4_LOCAL_PORT_RANGE };
                int buffer[2] = { 32768, 61000 };
                size_t size = sizeof(buffer);
                show_result(sysctl(name, 3, buffer, &size, 0, 0), 1);
                delete_policy();
                show_result(sysctl(name, 3, buffer, &size, 0, 0), 0);
        }
        policy = "allow_write /proc/sys/net/ipv4/ip_local_port_range "
                "if task.euid=0 0=0 1-100=10-1000";
        if (write_policy()) {
                static int name[] = { CTL_NET, NET_IPV4,
                                      NET_IPV4_LOCAL_PORT_RANGE };
                int buffer[2] = { 32768, 61000 };
                size_t size = sizeof(buffer);
                show_result(sysctl(name, 3, 0, 0, buffer, size), 1);
                delete_policy();
                show_result(sysctl(name, 3, 0, 0, buffer, size), 0);
        }
        policy = "allow_read/write /proc/sys/net/ipv4/ip_local_port_range "
                "if 1!=10-100";
        if (write_policy()) {
                static int name[] = { CTL_NET, NET_IPV4,
                                      NET_IPV4_LOCAL_PORT_RANGE };
                int buffer[2] = { 32768, 61000 };
                size_t size = sizeof(buffer);
                show_result(sysctl(name, 3, buffer, &size, buffer, size), 1);
                delete_policy();
                show_result(sysctl(name, 3, buffer, &size, buffer, size), 0);
        }

        policy = "allow_read /bin/true "
                "if path1.uid=0 path1.parent.uid=0 10=10-100";
        if (write_policy()) {
                show_result(uselib("/bin/true"), 1);
                delete_policy();
                show_result(uselib("/bin/true"), 0);
        }

        policy = "allow_execute /bin/true if task.uid!=10 path1.parent.uid=0";
        if (write_policy()) {
                int pipe_fd[2] = { EOF, EOF };
                int err = 0;
                fflush(stdout);
                fflush(stderr);
                pipe(pipe_fd);
                if (fork() == 0) {
                        execl("/bin/true", "/bin/true", NULL);
                        err = errno;
                        write(pipe_fd[1], &err, sizeof(err));
                        _exit(0);
                }
                close(pipe_fd[1]);
                read(pipe_fd[0], &err, sizeof(err));
                close(pipe_fd[0]);
                wait(NULL);
                errno = err;
                show_result(err ? EOF : 0, 1);
                delete_policy();
                fflush(stdout);
                fflush(stderr);
                pipe(pipe_fd);
                if (fork() == 0) {
                        execl("/bin/true", "/bin/true", NULL);
                        err = errno;
                        write(pipe_fd[1], &err, sizeof(err));
                        _exit(0);
                }
                close(pipe_fd[1]);
                read(pipe_fd[0], &err, sizeof(err));
                close(pipe_fd[0]);
                wait(NULL);
                errno = err;
                show_result(err ? EOF : 0, 0);
        }

        policy = "allow_read /dev/null if path1.type=char path1.dev_major=1 "
                "path1.dev_minor=3";
        if (write_policy()) {
                int fd = open("/dev/null", O_RDONLY);
                show_result(fd, 1);
                if (fd != EOF)
                        close(fd);
                delete_policy();
                fd = open("/dev/null", O_RDONLY);
                show_result(fd, 0);
                if (fd != EOF)
                        close(fd);
        }

        policy = "allow_read /dev/null if path1.perm=0666";
        if (write_policy()) {
                int fd = open("/dev/null", O_RDONLY);
                show_result(fd, 1);
                if (fd != EOF)
                        close(fd);
                delete_policy();
                fd = open("/dev/null", O_RDONLY);
                show_result(fd, 0);
                if (fd != EOF)
                        close(fd);
        }

        policy = "allow_read /dev/null if path1.perm!=0777";
        if (write_policy()) {
                int fd = open("/dev/null", O_RDONLY);
                show_result(fd, 1);
                if (fd != EOF)
                        close(fd);
                delete_policy();
                fd = open("/dev/null", O_RDONLY);
                show_result(fd, 0);
                if (fd != EOF)
                        close(fd);
        }

        policy = "allow_read /dev/null if path1.perm=owner_read "
                "path1.perm=owner_write path1.perm!=owner_execute "
                "path1.perm=group_read path1.perm=group_write "
                "path1.perm!=group_execute path1.perm=others_read "
                "path1.perm=others_write path1.perm!=others_execute "
                "path1.perm!=setuid path1.perm!=setgid path1.perm!=sticky";
        if (write_policy()) {
                int fd = open("/dev/null", O_RDONLY);
                show_result(fd, 1);
                if (fd != EOF)
                        close(fd);
                delete_policy();
                fd = open("/dev/null", O_RDONLY);
                show_result(fd, 0);
                if (fd != EOF)
                        close(fd);
        }

        policy = "allow_mkfifo /tmp/mknod_fifo_test "
                "if path1.parent.perm=01777 path1.parent.perm=sticky "
                "path1.parent.uid=0 path1.parent.gid=0";
        if (write_policy()) {
                filename = "/tmp/mknod_fifo_test";
                show_result(mknod(filename, S_IFIFO, 0), 1);
                delete_policy();
                unlink2(filename);
                show_result(mknod(filename, S_IFIFO, 0), 0);
        }

        {
                char buffer[1024];
                struct stat sbuf;
                memset(buffer, 0, sizeof(buffer));
                memset(&sbuf, 0, sizeof(sbuf));
                filename = "/dev/null";
                stat(filename, &sbuf);
                snprintf(buffer, sizeof(buffer) - 1,
                         "allow_write %s if path1.major=%u path1.minor=%u",
                         filename, (unsigned int) MAJOR(sbuf.st_dev),
                         (unsigned int) MINOR(sbuf.st_dev));
                policy = buffer;
                if (write_policy()) {
                        int fd = open(filename, O_WRONLY);
                        show_result(fd, 1);
                        if (fd != EOF)
                                close(fd);
                        delete_policy();
                        fd = open(filename, O_WRONLY);
                        show_result(fd, 0);
                        if (fd != EOF)
                                close(fd);
                }
        }

        policy = "allow_read /dev/initctl if path1.type=fifo";
        if (write_policy()) {
                int fd = open("/dev/initctl", O_RDONLY);
                show_result(fd, 1);
                if (fd != EOF)
                        close(fd);
                delete_policy();
                fd = open("/dev/initctl", O_RDONLY);
                show_result(fd, 0);
                if (fd != EOF)
                        close(fd);
        }

        policy = "allow_read /dev/null if path1.parent.ino=path1.parent.ino";
        if (write_policy()) {
                int fd = open("/dev/null", O_RDONLY);
                show_result(fd, 1);
                if (fd != EOF)
                        close(fd);
                delete_policy();
                fd = open("/dev/null", O_RDONLY);
                show_result(fd, 0);
                if (fd != EOF)
                        close(fd);
        }

        policy = "allow_write /dev/null if path1.uid=path1.gid";
        if (write_policy()) {
                int fd = open("/dev/null", O_WRONLY);
                show_result(fd, 1);
                if (fd != EOF)
                        close(fd);
                delete_policy();
                fd = open("/dev/null", O_WRONLY);
                show_result(fd, 0);
                if (fd != EOF)
                        close(fd);
        }

        policy = "allow_read/write /dev/null if task.uid=path1.parent.uid";
        if (write_policy()) {
                int fd = open("/dev/null", O_RDWR);
                show_result(fd, 1);
                if (fd != EOF)
                        close(fd);
                delete_policy();
                fd = open("/dev/null", O_RDWR);
                show_result(fd, 0);
                if (fd != EOF)
                        close(fd);
        }

        policy = "allow_create /tmp/open_test if path1.parent.uid=task.uid";
        if (write_policy()) {
                policy = "allow_write /tmp/open_test if path1.parent.uid=0";
                if (write_policy()) {
                        int fd = open("/tmp/open_test",
                                      O_WRONLY | O_CREAT | O_EXCL, 0666);
                        show_result(fd, 1);
                        if (fd != EOF)
                                close(fd);
                        unlink2("/tmp/open_test");
                        delete_policy();
                        fd = open("/tmp/open_test",
                                  O_WRONLY | O_CREAT | O_EXCL, 0666);
                        show_result(fd, 0);
                        if (fd != EOF)
                                close(fd);
                        unlink2("/tmp/open_test");
                }
                policy = "allow_create /tmp/open_test "
                        "if path1.parent.uid=task.uid\n";
                delete_policy();
        }

        policy = "allow_write /tmp/open_test if task.uid=0 path1.ino!=0";
        if (write_policy()) {
                policy = "allow_create /tmp/open_test if 0=0";
                if (write_policy()) {
                        int fd = open("/tmp/open_test",
                                      O_WRONLY | O_CREAT | O_EXCL, 0666);
                        show_result(fd, 1);
                        if (fd != EOF)
                                close(fd);
                        unlink2("/tmp/open_test");
                        delete_policy();
                        fd = open("/tmp/open_test",
                                  O_WRONLY | O_CREAT | O_EXCL, 0666);
                        show_result(fd, 0);
                        if (fd != EOF)
                                close(fd);
                        unlink2("/tmp/open_test");
                }
                policy = "allow_write /tmp/open_test "
                        "if task.uid=0 path1.ino!=0\n";
                delete_policy();
        }

        filename = "/tmp/truncate_test";
        create2(filename);

        policy = "allow_truncate /tmp/truncate_test if task.uid=path1.uid";
        if (write_policy()) {
                policy = "allow_write /tmp/truncate_test if 1!=100-1000000";
                if (write_policy()) {
                        int fd = open(filename, O_WRONLY | O_TRUNC);
                        show_result(fd, 1);
                        if (fd != EOF)
                                close(fd);
                        delete_policy();
                        fd = open(filename, O_WRONLY | O_TRUNC);
                        show_result(fd, 0);
                        if (fd != EOF)
                                close(fd);
                }
                policy = "allow_truncate /tmp/truncate_test "
                        "if task.uid=path1.uid";
                delete_policy();
        }

        policy = "allow_write /tmp/truncate_test";
        if (write_policy()) {
                policy = "allow_truncate /tmp/truncate_test";
                if (write_policy()) {
                        int fd = open(filename, O_WRONLY | O_TRUNC);
                        show_result(fd, 1);
                        if (fd != EOF)
                                close(fd);
                        delete_policy();
                        fd = open(filename, O_WRONLY | O_TRUNC);
                        show_result(fd, 0);
                        if (fd != EOF)
                                close(fd);
                }
                policy = "allow_write /tmp/truncate_test\n";
                delete_policy();
        }

        policy = "allow_truncate /tmp/truncate_test";
        if (write_policy()) {
                show_result(truncate(filename, 0), 1);
                delete_policy();
                show_result(truncate(filename, 0), 0);
        }

        policy = "allow_truncate /tmp/truncate_test";
        if (write_policy()) {
                int fd;
                const char *cp = "255-MAC_FOR_FILE=disabled\n";
                write(profile_fd, cp, strlen(cp));
                fd = open(filename, O_WRONLY);
                cp = "255-MAC_FOR_FILE=enforcing\n";
                write(profile_fd, cp, strlen(cp));
                show_result(ftruncate(fd, 0), 1);
                delete_policy();
                show_result(ftruncate(fd, 0), 0);
                if (fd != EOF)
                        close(fd);
        }

        unlink2(filename);

        policy = "allow_create /tmp/mknod_reg_test";
        if (write_policy()) {
                filename = "/tmp/mknod_reg_test";
                show_result(mknod(filename, S_IFREG, 0), 1);
                delete_policy();
                unlink2(filename);
                show_result(mknod(filename, S_IFREG, 0), 0);
        }

        policy = "allow_mkchar /tmp/mknod_chr_test";
        if (write_policy()) {
                filename = "/tmp/mknod_chr_test";
                show_result(mknod(filename, S_IFCHR, MKDEV(1, 3)), 1);
                delete_policy();
                unlink2(filename);
                show_result(mknod(filename, S_IFCHR, MKDEV(1, 3)), 0);
        }

        policy = "allow_mkblock /tmp/mknod_blk_test";
        if (write_policy()) {
                filename = "/tmp/mknod_blk_test";
                show_result(mknod(filename, S_IFBLK, MKDEV(1, 0)), 1);
                delete_policy();
                unlink2(filename);
                show_result(mknod(filename, S_IFBLK, MKDEV(1, 0)), 0);
        }

        policy = "allow_mkfifo /tmp/mknod_fifo_test";
        if (write_policy()) {
                filename = "/tmp/mknod_fifo_test";
                show_result(mknod(filename, S_IFIFO, 0), 1);
                delete_policy();
                unlink2(filename);
                show_result(mknod(filename, S_IFIFO, 0), 0);
        }

        policy = "allow_mksock /tmp/mknod_sock_test";
        if (write_policy()) {
                filename = "/tmp/mknod_sock_test";
                show_result(mknod(filename, S_IFSOCK, 0), 1);
                delete_policy();
                unlink2(filename);
                show_result(mknod(filename, S_IFSOCK, 0), 0);
        }

        policy = "allow_mkdir /tmp/mkdir_test/";
        if (write_policy()) {
                filename = "/tmp/mkdir_test";
                show_result(mkdir(filename, 0600), 1);
                delete_policy();
                rmdir2(filename);
                show_result(mkdir(filename, 0600), 0);
        }

        policy = "allow_rmdir /tmp/rmdir_test/";
        if (write_policy()) {
                filename = "/tmp/rmdir_test";
                mkdir2(filename);
                show_result(rmdir(filename), 1);
                delete_policy();
                mkdir2(filename);
                show_result(rmdir(filename), 0);
                rmdir2(filename);
        }

        policy = "allow_unlink /tmp/unlink_test";
        if (write_policy()) {
                filename = "/tmp/unlink_test";
                create2(filename);
                show_result(unlink(filename), 1);
                delete_policy();
                create2(filename);
                show_result(unlink(filename), 0);
                unlink2(filename);
        }

        policy = "allow_symlink /tmp/symlink_source_test";
        if (write_policy()) {
                filename = "/tmp/symlink_source_test";
                show_result(symlink("/tmp/symlink_dest_test", filename), 1);
                delete_policy();
                unlink2(filename);
                show_result(symlink("/tmp/symlink_dest_test", filename), 0);
        }

        policy = "allow_link /tmp/link_source_test /tmp/link_dest_test";
        if (write_policy()) {
                filename = "/tmp/link_source_test";
                create2(filename);
                show_result(link(filename, "/tmp/link_dest_test"), 1);
                delete_policy();
                unlink2("/tmp/link_dest_test");
                show_result(link(filename, "/tmp/link_dest_test"), 0);
                unlink2(filename);
        }

        policy = "allow_rename /tmp/rename_source_test /tmp/rename_dest_test";
        if (write_policy()) {
                filename = "/tmp/rename_source_test";
                create2(filename);
                show_result(rename(filename, "/tmp/rename_dest_test"), 1);
                delete_policy();
                unlink2("/tmp/rename_dest_test");
                create2(filename);
                show_result(rename(filename, "/tmp/rename_dest_test"), 0);
                unlink2(filename);
        }

        policy = "allow_mksock /tmp/socket_test";
        if (write_policy()) {
                struct sockaddr_un addr;
                int fd;
                filename = "/tmp/socket_test";
                memset(&addr, 0, sizeof(addr));
                addr.sun_family = AF_UNIX;
                strncpy(addr.sun_path, filename, sizeof(addr.sun_path) - 1);
                fd = socket(AF_UNIX, SOCK_STREAM, 0);
                show_result(bind(fd, (struct sockaddr *) &addr, sizeof(addr)),
                            1);
                if (fd != EOF)
                        close(fd);
                delete_policy();
                unlink2(filename);
                fd = socket(AF_UNIX, SOCK_STREAM, 0);
                show_result(bind(fd, (struct sockaddr *) &addr, sizeof(addr)),
                            0);
                if (fd != EOF)
                        close(fd);
        }

        filename = "/tmp/rewrite_test";
        create2(filename);
        policy = "allow_read/write /tmp/rewrite_test";
        if (write_policy()) {
                char *cp = "deny_rewrite /tmp/rewrite_test\n";
                write(exception_fd, cp, strlen(cp));
                policy = "allow_truncate /tmp/rewrite_test";
                if (write_policy()) {
                        int fd;

                        fd = open(filename, O_RDONLY);
                        show_result(fd, 1);
                        if (fd != EOF)
                                close(fd);

                        fd = open(filename, O_WRONLY | O_APPEND);
                        show_result(fd, 1);
                        if (fd != EOF)
                                close(fd);

                        fd = open(filename, O_WRONLY);
                        show_result(fd, 0);
                        if (fd != EOF)
                                close(fd);

                        fd = open(filename, O_WRONLY | O_TRUNC);
                        show_result(fd, 0);
                        if (fd != EOF)
                                close(fd);

                        fd = open(filename, O_WRONLY | O_TRUNC | O_APPEND);
                        show_result(fd, 0);
                        if (fd != EOF)
                                close(fd);

                        show_result(truncate(filename, 0), 0);

                        cp = "255-MAC_FOR_FILE=disabled\n";
                        write(profile_fd, cp, strlen(cp));
                        fd = open(filename, O_WRONLY | O_APPEND);
                        cp = "255-MAC_FOR_FILE=enforcing\n";
                        write(profile_fd, cp, strlen(cp));
                        show_result(ftruncate(fd, 0), 0);

                        show_result(fcntl(fd, F_SETFL,
                                          fcntl(fd, F_GETFL) & ~O_APPEND), 0);
                        if (fd != EOF)
                                close(fd);

                        delete_policy();
                }
                policy = "allow_read/write /tmp/rewrite_test";
                delete_policy();
                cp = "delete deny_rewrite /tmp/rewrite_test\n";
                write(exception_fd, cp, strlen(cp));
        }
        unlink2(filename);
}

int main(int argc, char *argv[])
{
        char *cp;
        ccs_test_init();
        domain_fd = open(proc_policy_domain_policy, O_WRONLY);
        exception_fd = open(proc_policy_exception_policy, O_WRONLY);
        {
                int self_fd = open(proc_policy_self_domain, O_RDONLY);
                memset(self_domain, 0, sizeof(self_domain));
                read(self_fd, self_domain, sizeof(self_domain) - 1);
                close(self_fd);
                write(domain_fd, self_domain, strlen(self_domain));
                cp = " /bin/true\n";
                write(domain_fd, cp, strlen(cp));
                write(domain_fd, self_domain, strlen(self_domain));
                write(domain_fd, "\n", 1);
                cp = "use_profile 255\n";
                write(domain_fd, cp, strlen(cp));
        }
        cp = "255-MAX_REJECT_LOG=1024\n";
        write(profile_fd, cp, strlen(cp));
        stage_file_test();
        cp = "use_profile 0\n";
        write(domain_fd, cp, strlen(cp));
        clear_status();
        return 0;
}