int probe_main(probe_ctx *ctx, void *probe_arg)
{
SEXP_t *unit_entity, *probe_in, *property_entity;
oval_version_t oval_version;
probe_in = probe_ctx_getobject(ctx);
oval_version = probe_obj_get_schema_version(probe_in);
if (oval_version_cmp(oval_version, OVAL_VERSION(5.11)) < 0) {
// OVAL 5.10 and less
return PROBE_EOPNOTSUPP;
}
unit_entity = probe_obj_getent(probe_in, "unit", 1);
property_entity = probe_obj_getent(probe_in, "property", 1);
DBusError dbus_error;
DBusConnection *dbus_conn;
dbus_error_init(&dbus_error);
dbus_conn = connect_dbus();
if (dbus_conn == NULL) {
dbus_error_free(&dbus_error);
SEXP_free(property_entity);
SEXP_free(unit_entity);
return PROBE_ESYSTEM;
}
struct unit_callback_vars vars;
vars.dbus_conn = dbus_conn;
vars.ctx = ctx;
vars.unit_entity = unit_entity;
vars.property_entity = property_entity;
get_all_systemd_units(dbus_conn, unit_callback, &vars);
SEXP_free(unit_entity);
SEXP_free(property_entity);
dbus_error_free(&dbus_error);
disconnect_dbus(dbus_conn);
return 0;
}
int probe_main(probe_ctx *ctx, void *arg)
{
SEXP_t *obj, *ent;
obj = probe_ctx_getobject(ctx);
over = probe_obj_get_schema_version(obj);
ent = probe_obj_getent(obj, "command", 1);
if (ent == NULL) {
return PROBE_ENOVAL;
}
if (read_process(ent, ctx)) {
SEXP_free(ent);
return PROBE_EACCESS;
}
SEXP_free(ent);
return 0;
}
int probe_main(probe_ctx *ctx, void *probe_arg)
{
int probe_ret = 0;
SEXP_t *mnt_entity, *mnt_opval, *mnt_entval, *probe_in;
char mnt_path[PATH_MAX];
oval_operation_t mnt_op;
FILE *mnt_fp;
oval_version_t obj_over;
#if defined(PROC_CHECK) && defined(__linux__)
int mnt_fd;
struct statfs stfs;
mnt_fd = open(MTAB_PATH, O_RDONLY);
if (mnt_fd < 0)
return (PROBE_ESYSTEM);
if (fstatfs(mnt_fd, &stfs) != 0) {
close(mnt_fd);
return (PROBE_ESYSTEM);
}
if (stfs.f_type != PROC_SUPER_MAGIC) {
close(mnt_fd);
return (PROBE_EFATAL);
}
mnt_fp = fdopen(mnt_fd, "r");
if (mnt_fp == NULL) {
close(mnt_fd);
return (PROBE_ESYSTEM);
}
#else
mnt_fp = fopen(MTAB_PATH, "r");
if (mnt_fp == NULL)
return (PROBE_ESYSTEM);
#endif
probe_in = probe_ctx_getobject(ctx);
obj_over = probe_obj_get_schema_version(probe_in);
mnt_entity = probe_obj_getent(probe_in, "mount_point", 1);
if (mnt_entity == NULL) {
fclose(mnt_fp);
return (PROBE_ENOENT);
}
mnt_opval = probe_ent_getattrval(mnt_entity, "operation");
if (mnt_opval != NULL) {
mnt_op = (oval_operation_t)SEXP_number_geti(mnt_opval);
SEXP_free(mnt_opval);
} else
mnt_op = OVAL_OPERATION_EQUALS;
mnt_entval = probe_ent_getval(mnt_entity);
if (!SEXP_stringp(mnt_entval)) {
SEXP_free(mnt_entval);
SEXP_free(mnt_entity);
fclose(mnt_fp);
return (PROBE_EINVAL);
}
SEXP_string_cstr_r(mnt_entval, mnt_path, sizeof mnt_path);
SEXP_free(mnt_entval);
SEXP_free(mnt_entity);
if (mnt_fp != NULL) {
char buffer[MTAB_LINE_MAX];
struct mntent mnt_ent, *mnt_entp;
pcre *re = NULL;
const char *estr = NULL;
int eoff = -1;
#if defined(HAVE_BLKID_GET_TAG_VALUE)
blkid_cache blkcache;
if (blkid_get_cache(&blkcache, NULL) != 0) {
endmntent(mnt_fp);
return (PROBE_EUNKNOWN);
}
#endif
if (mnt_op == OVAL_OPERATION_PATTERN_MATCH) {
re = pcre_compile(mnt_path, PCRE_UTF8, &estr, &eoff, NULL);
if (re == NULL) {
endmntent(mnt_fp);
return (PROBE_EINVAL);
}
}
while ((mnt_entp = getmntent_r(mnt_fp, &mnt_ent,
buffer, sizeof buffer)) != NULL)
{
if (strcmp(mnt_entp->mnt_type, "rootfs") == 0)
continue;
if (mnt_op == OVAL_OPERATION_EQUALS) {
if (strcmp(mnt_entp->mnt_dir, mnt_path) == 0) {
#if defined(HAVE_BLKID_GET_TAG_VALUE)
collect_item(ctx, obj_over, mnt_entp, blkcache);
#else
collect_item(ctx, obj_over, mnt_entp);
#endif
break;
}
} else if (mnt_op == OVAL_OPERATION_NOT_EQUAL) {
if (strcmp(mnt_entp->mnt_dir, mnt_path) != 0) {
if (
#if defined(HAVE_BLKID_GET_TAG_VALUE)
collect_item(ctx, obj_over, mnt_entp, blkcache)
#else
collect_item(ctx, obj_over, mnt_entp)
#endif
!= 0)
break;
}
} else if (mnt_op == OVAL_OPERATION_PATTERN_MATCH) {
int rc;
rc = pcre_exec(re, NULL, mnt_entp->mnt_dir,
strlen(mnt_entp->mnt_dir), 0, 0, NULL, 0);
if (rc == 0) {
if (
#if defined(HAVE_BLKID_GET_TAG_VALUE)
collect_item(ctx, obj_over, mnt_entp, blkcache)
#else
collect_item(ctx, obj_over, mnt_entp)
#endif
!= 0)
break;
}
/* XXX: check for pcre_exec error */
}
}
endmntent(mnt_fp);
if (mnt_op == OVAL_OPERATION_PATTERN_MATCH)
pcre_free(re);
}
return (probe_ret);
}
static int read_process(SEXP_t *cmd_ent, SEXP_t *pid_ent, probe_ctx *ctx)
{
int err = 1, max_cap_id;
DIR *d;
struct dirent *ent;
oval_version_t oval_version;
d = opendir("/proc");
if (d == NULL)
return err;
// Get the time tick hertz
ticks = (unsigned long)sysconf(_SC_CLK_TCK);
get_boot_time();
oval_version = probe_obj_get_schema_version(probe_ctx_getobject(ctx));
if (oval_version_cmp(oval_version, OVAL_VERSION(5.11)) < 0) {
max_cap_id = OVAL_5_8_MAX_CAP_ID;
} else {
max_cap_id = OVAL_5_11_MAX_CAP_ID;
}
struct oscap_buffer *cmdline_buffer = oscap_buffer_new();
char cmd_buffer[1 + 15 + 11 + 1]; // Format:" [ cmd:15 ] <defunc>"
cmd_buffer[0] = '[';
// Scan the directories
while (( ent = readdir(d) )) {
int fd, len;
char buf[256];
char *tmp, state, tty_dev[128];
int pid, ppid, pgrp, session, tty_nr, tpgid;
unsigned flags, sched_policy;
unsigned long minflt, cminflt, majflt, cmajflt, uutime, ustime;
long cutime, cstime, priority, cnice, nthreads, itrealvalue;
unsigned long long start;
SEXP_t *cmd_sexp = NULL, *pid_sexp = NULL;
// Skip non-process58 dir entries
if(*ent->d_name<'0' || *ent->d_name>'9')
continue;
errno = 0;
pid = strtol(ent->d_name, NULL, 10);
if (errno || pid == 2) // skip err & kthreads
continue;
// Parse up the stat file for the proc
snprintf(buf, 32, "/proc/%d/stat", pid);
fd = open(buf, O_RDONLY, 0);
if (fd < 0)
continue;
len = read(fd, buf, sizeof buf - 1);
close(fd);
if (len < 40)
continue;
buf[len] = 0;
tmp = strrchr(buf, ')');
if (tmp)
*tmp = 0;
else
continue;
memset(cmd_buffer + 1, 0, sizeof(cmd_buffer)-1); // clear cmd after starting '['
sscanf(buf, "%d (%15c", &ppid, cmd_buffer + 1);
sscanf(tmp+2, "%c %d %d %d %d %d "
"%u %lu %lu %lu %lu "
"%lu %lu %lu %ld %ld "
"%ld %ld %ld %llu",
&state, &ppid, &pgrp, &session, &tty_nr, &tpgid,
&flags, &minflt, &cminflt, &majflt, &cmajflt,
&uutime, &ustime, &cutime, &cstime, &priority,
&cnice, &nthreads, &itrealvalue, &start
);
// Skip kthreads
if (ppid == 2)
continue;
const char* cmd;
if (state == 'Z') { // zombie
cmd = make_defunc_str(cmd_buffer);
} else {
snprintf(buf, 32, "/proc/%d/cmdline", pid);
if (get_process_cmdline(buf, cmdline_buffer)) {
cmd = oscap_buffer_get_raw(cmdline_buffer); // use full cmdline
} else {
cmd = cmd_buffer + 1;
}
}
err = 0; // If we get this far, no permission problems
dI("Have command: %s\n", cmd);
cmd_sexp = SEXP_string_newf("%s", cmd);
pid_sexp = SEXP_number_newu_32(pid);
if ((cmd_sexp == NULL || probe_entobj_cmp(cmd_ent, cmd_sexp) == OVAL_RESULT_TRUE) &&
(pid_sexp == NULL || probe_entobj_cmp(pid_ent, pid_sexp) == OVAL_RESULT_TRUE)
) {
struct result_info r;
unsigned long t = uutime/ticks + ustime/ticks;
char tbuf[32], sbuf[32], *selinux_domain_label, **posix_capabilities;
int tday,tyear;
time_t s_time;
struct tm *proc, *now;
const char *fmt;
// Now get scheduler policy
sched_policy = sched_getscheduler(pid);
switch (sched_policy) {
case SCHED_OTHER:
r.scheduling_class = "TS";
break;
case SCHED_BATCH:
r.scheduling_class = "B";
break;
#ifdef SCHED_IDLE
case SCHED_IDLE:
r.scheduling_class = "#5";
break;
#endif
case SCHED_FIFO:
r.scheduling_class = "FF";
break;
case SCHED_RR:
r.scheduling_class = "RR";
break;
default:
r.scheduling_class = "?";
break;
}
// Calculate the start time
s_time = time(NULL);
now = localtime(&s_time);
tyear = now->tm_year;
tday = now->tm_yday;
s_time = boot + (start / ticks);
proc = localtime(&s_time);
// Select format based on how long we've been running
//
// FROM THE SPEC:
// "This is the time of day the process started formatted in HH:MM:SS if
// the same day the process started or formatted as MMM_DD (Ex.: Feb_5)
// if process started the previous day or further in the past."
//
if (tday != proc->tm_yday || tyear != proc->tm_year)
fmt = "%b_%d";
else
fmt = "%H:%M:%S";
strftime(sbuf, sizeof(sbuf), fmt, proc);
r.command_line = cmd;
r.exec_time = convert_time(t, tbuf, sizeof(tbuf));
r.pid = pid;
r.ppid = ppid;
r.priority = priority;
r.start_time = sbuf;
dev_to_tty(tty_dev, sizeof(tty_dev), (dev_t) tty_nr, pid, ABBREV_DEV);
r.tty = tty_dev;
r.exec_shield = (get_exec_shield_status(pid) > 0);
selinux_domain_label = get_selinux_label(pid);
r.selinux_domain_label = selinux_domain_label;
posix_capabilities = get_posix_capability(pid, max_cap_id);
r.posix_capability = posix_capabilities;
r.session_id = session;
get_uids(pid, &r);
report_finding(&r, ctx);
if (selinux_domain_label != NULL)
free(selinux_domain_label);
if (posix_capabilities != NULL) {
char **posix_capabilities_p = posix_capabilities;
while (*posix_capabilities_p)
free(*posix_capabilities_p++);
free(posix_capabilities);
}
}
SEXP_free(cmd_sexp);
SEXP_free(pid_sexp);
}
closedir(d);
oscap_buffer_free(cmdline_buffer);
return err;
}
