static int eval_data(const char *type, const char *local_address,
unsigned int local_port)
{
SEXP_t *r0;
r0 = SEXP_string_newf("%s", type);
if (probe_entobj_cmp(req.protocol_ent, r0) != OVAL_RESULT_TRUE) {
SEXP_free(r0);
return 0;
}
SEXP_free(r0);
r0 = SEXP_string_newf("%s", local_address);
if (probe_entobj_cmp(req.local_address_ent, r0) != OVAL_RESULT_TRUE) {
SEXP_free(r0);
return 0;
}
SEXP_free(r0);
r0 = SEXP_number_newu_32(local_port);
if (probe_entobj_cmp(req.local_port_ent, r0) != OVAL_RESULT_TRUE) {
SEXP_free(r0);
return 0;
}
SEXP_free(r0);
return 1;
}
static int collect_item(struct route_info *rt, probe_ctx *ctx)
{
SEXP_t *item, *rt_dst;
oval_datatype_t addr_type;
rt_dst = SEXP_string_new(rt->ip_dst, strlen(rt->ip_dst));
if (probe_entobj_cmp(rt->ip_dst_ent, rt_dst) != OVAL_RESULT_TRUE) {
SEXP_free(rt_dst);
return 0;
}
addr_type = rt->ip_version == 4 ? OVAL_DATATYPE_IPV4ADDR : OVAL_DATATYPE_IPV6ADDR;
/* create the item */
item = probe_item_create(OVAL_UNIX_ROUTINGTABLE, NULL,
"destination", addr_type, rt->ip_dst,
"gateway", addr_type, rt->ip_gw,
"flags", OVAL_DATATYPE_STRING_M, rt->rt_flags,
"interface_name", OVAL_DATATYPE_STRING, rt->if_name,
NULL);
SEXP_free(rt_dst);
return probe_item_collect(ctx, item) == 2 ? 1 : 0;
}
static int unit_callback(const char *unit, void *cbarg)
{
struct unit_callback_vars *vars = (struct unit_callback_vars *)cbarg;
SEXP_t *se_unit = SEXP_string_new(unit, strlen(unit));
if (probe_entobj_cmp(vars->unit_entity, se_unit) != OVAL_RESULT_TRUE) {
/* Do nothing, continue with the next unit */
SEXP_free(se_unit);
return 0;
}
vars->se_unit = se_unit;
vars->se_property = NULL;
vars->item = NULL;
char *unit_path = get_path_by_unit(vars->dbus_conn, unit);
if (unit_path == NULL) {
return 1;
}
get_all_properties_by_unit_path(vars->dbus_conn, unit_path,
property_callback, vars);
if (vars->item != NULL) {
probe_item_collect(vars->ctx, vars->item);
vars->item = NULL;
SEXP_free(vars->se_property);
vars->se_property = NULL;
}
SEXP_free(se_unit);
return 0;
}
static int read_packet(llist *l, probe_ctx *ctx, oval_schema_version_t over)
{
int line = 0;
FILE *f;
char buf[256];
void *s;
int refcnt, sk_type, ifindex, running;
unsigned long inode;
unsigned rmem, uid, proto_num;
struct interface_t interface;
f = fopen("/proc/net/packet", "rt");
if (f == NULL) {
if (errno != ENOENT)
return 1;
else
return 0;
}
__fsetlocking(f, FSETLOCKING_BYCALLER);
while (fgets(buf, sizeof(buf), f)) {
if (line == 0) {
line++;
continue;
}
/* follow structure from net/packet/af_packet.c */
sscanf(buf,
"%p %d %d %04x %d %d %u %u %lu\n",
&s, &refcnt, &sk_type, &proto_num, &ifindex, &running, &rmem, &uid, &inode
);
if (list_find_inode(l, inode) && get_interface(ifindex, &interface)) {
struct result_info r;
SEXP_t *r0;
dI("Have interface_name: %s, hw_address: %s\n",
interface.interface_name, interface.hw_address);
r0 = SEXP_string_newf("%s", interface.interface_name);
if (probe_entobj_cmp(interface_name_ent, r0) != OVAL_RESULT_TRUE) {
SEXP_free(r0);
continue;
}
SEXP_free(r0);
r.interface_name = interface.interface_name;
r.protocol = oscap_enum_to_string(ProtocolType, proto_num);
r.hw_address = interface.hw_address;
report_finding(&r, l, ctx, over);
}
}
fclose(f);
return 0;
}
static int read_password(SEXP_t *un_ent, probe_ctx *ctx, oval_schema_version_t over)
{
struct passwd *pw;
while ((pw = getpwent())) {
SEXP_t *un;
dI("Have user: %s", pw->pw_name);
un = SEXP_string_newf("%s", pw->pw_name);
if (probe_entobj_cmp(un_ent, un) == OVAL_RESULT_TRUE) {
struct result_info r;
r.username = pw->pw_name;
r.password = pw->pw_passwd;
r.user_id = pw->pw_uid;
r.group_id = pw->pw_gid;
r.gcos = pw->pw_gecos;
r.home_dir = pw->pw_dir;
r.login_shell = pw->pw_shell;
r.last_login = -1;
if (oval_schema_version_cmp(over, OVAL_SCHEMA_VERSION(5.10)) >= 0) {
FILE *ll_fp = fopen(_PATH_LASTLOG, "r");
if (ll_fp != NULL) {
struct lastlog ll;
if (fseeko(ll_fp, (off_t)pw->pw_uid * sizeof(ll), SEEK_SET) == 0)
if (fread((char *)&ll, sizeof(ll), 1, ll_fp) == 1)
r.last_login = (int64_t)ll.ll_time;
fclose(ll_fp);
}
}
report_finding(&r, ctx, over);
}
SEXP_free(un);
}
endpwent();
return 0;
}
int accesstoken_probe_main(probe_ctx *ctx, void *arg)
{
SEXP_t *probe_in = probe_ctx_getobject(ctx);
SEXP_t *behaviors_ent = probe_obj_getent(probe_in, "behaviors", 1);
SEXP_t *security_principle_ent = probe_obj_getent(probe_in, "security_principle", 1);
SEXP_t *security_principle_val = probe_ent_getval(security_principle_ent);
bool include_group = accesstoken_behaviors_get_include_group(behaviors_ent);
bool resolve_group = accesstoken_behaviors_get_resolve_group(behaviors_ent);
oval_operation_t operation = probe_ent_getoperation(security_principle_ent, OVAL_OPERATION_EQUALS);
if (operation == OVAL_OPERATION_EQUALS) {
char *security_principle_str = SEXP_string_cstr(security_principle_val);
WCHAR *security_principle_wstr = oscap_windows_str_to_wstr(security_principle_str);
collect_access_rights(ctx, security_principle_wstr, include_group, resolve_group);
free(security_principle_str);
free(security_principle_wstr);
} else {
struct oscap_list *trustees_list = oscap_list_new();
get_all_trustee_names(trustees_list);
struct oscap_iterator *it = oscap_iterator_new(trustees_list);
while (oscap_iterator_has_more(it)) {
WCHAR *trustee_wstr = oscap_iterator_next(it);
char *trustee_str = oscap_windows_wstr_to_str(trustee_wstr);
SEXP_t *tmp = SEXP_string_new(trustee_str, strlen(trustee_str));
if (probe_entobj_cmp(security_principle_ent, tmp) == OVAL_RESULT_TRUE) {
collect_access_rights(ctx, trustee_wstr, include_group, resolve_group);
}
free(trustee_str);
SEXP_free(tmp);
}
oscap_iterator_free(it);
oscap_list_free(trustees_list, free);
}
SEXP_free(behaviors_ent);
SEXP_free(security_principle_ent);
SEXP_free(security_principle_val);
return 0;
}
static int property_callback(const char *property, const char *value, void *cbarg)
{
struct unit_callback_vars *vars = (struct unit_callback_vars *)cbarg;
if (vars->se_property != NULL) {
//
// Compare the previously matched entity to the current one
// If they are the same, continue to fill the current item
// with property values. If not, collect the item and create
// a new one for the current property.
//
if (SEXP_strcmp(vars->se_property, property) == 0) {
SEXP_t *se_value = SEXP_string_new(value, strlen(value));
probe_item_ent_add(vars->item, "value", NULL, se_value);
SEXP_free(se_value);
return 0;
} else {
probe_item_collect(vars->ctx, vars->item);
vars->item = NULL;
SEXP_free(vars->se_property);
vars->se_property = NULL;
}
}
SEXP_t *se_property = SEXP_string_new(property, strlen(property));
if (probe_entobj_cmp(vars->property_entity, se_property) != OVAL_RESULT_TRUE) {
SEXP_free(se_property);
return 0;
}
vars->se_property = se_property;
vars->item = probe_item_create(OVAL_LINUX_SYSTEMDUNITPROPERTY, NULL,
"unit", OVAL_DATATYPE_SEXP, vars->se_unit,
"property", OVAL_DATATYPE_SEXP, vars->se_property,
"value", OVAL_DATATYPE_STRING, value,
NULL);
return 0;
}
static int get_selinuxboolean(SEXP_t *ut_ent, probe_ctx *ctx)
{
int err = 1, active, pending, len, i;
SEXP_t *boolean, *item;
char **booleans;
if ( ! is_selinux_enabled()) {
probe_cobj_set_flag(probe_ctx_getresult(ctx), SYSCHAR_FLAG_NOT_APPLICABLE);
return 0;
}
if (security_get_boolean_names(&booleans, &len) == -1) {
probe_cobj_set_flag(probe_ctx_getresult(ctx), SYSCHAR_FLAG_ERROR);
return err;
}
for (i = 0; i < len; i++) {
boolean = SEXP_string_new(booleans[i], strlen(booleans[i]));
if (probe_entobj_cmp(ut_ent, boolean) == OVAL_RESULT_TRUE) {
active = security_get_boolean_active(booleans[i]);
pending = security_get_boolean_pending(booleans[i]);
item = probe_item_create(
OVAL_LINUX_SELINUXBOOLEAN, NULL,
"name", OVAL_DATATYPE_SEXP, boolean,
"current_status", OVAL_DATATYPE_BOOLEAN, active,
"pending_status", OVAL_DATATYPE_BOOLEAN, pending,
NULL);
probe_item_collect(ctx, item);
}
SEXP_free(boolean);
}
for (i = 0; i < len; i++)
free(booleans[i]);
free(booleans);
return 0;
}
static int process_file(const char *path, const char *file, void *arg)
{
struct pfdata *pfd = (struct pfdata *) arg;
int ret = 0, path_len, file_len, cur_inst = 0, fd = -1, substr_cnt,
buf_size = 0, buf_used = 0, ofs = 0, buf_inc = 4096;
char *whole_path = NULL, *buf = NULL;
SEXP_t *next_inst = NULL;
struct stat st;
if (file == NULL)
goto cleanup;
path_len = strlen(path);
file_len = strlen(file);
whole_path = oscap_alloc(path_len + file_len + 2);
memcpy(whole_path, path, path_len);
if (whole_path[path_len - 1] != FILE_SEPARATOR) {
whole_path[path_len] = FILE_SEPARATOR;
++path_len;
}
memcpy(whole_path + path_len, file, file_len + 1);
/*
* If stat() fails, don't report an error and just skip the file.
* This is an expected situation, because the fts_*() functions
* are called with the 'FTS_PHYSICAL' option. Normally, stumbling
* upon a symlink without a target would cause fts_read() to return
* the 'FTS_SLNONE' flag, but the 'FTS_PHYSICAL' option causes it
* to return 'FTS_SL' and the presence of a valid target has to
* be determined with stat().
*/
if (stat(whole_path, &st) == -1)
goto cleanup;
if (!S_ISREG(st.st_mode))
goto cleanup;
fd = open(whole_path, O_RDONLY);
if (fd == -1) {
SEXP_t *msg;
msg = probe_msg_creatf(OVAL_MESSAGE_LEVEL_ERROR, "open(): '%s' %s.", whole_path, strerror(errno));
probe_cobj_add_msg(probe_ctx_getresult(pfd->ctx), msg);
SEXP_free(msg);
probe_cobj_set_flag(probe_ctx_getresult(pfd->ctx), SYSCHAR_FLAG_ERROR);
ret = -1;
goto cleanup;
}
do {
buf_size += buf_inc;
buf = oscap_realloc(buf, buf_size);
ret = read(fd, buf + buf_used, buf_inc);
if (ret == -1) {
SEXP_t *msg;
msg = probe_msg_creatf(OVAL_MESSAGE_LEVEL_ERROR, "read(): '%s' %s.", whole_path, strerror(errno));
probe_cobj_add_msg(probe_ctx_getresult(pfd->ctx), msg);
SEXP_free(msg);
probe_cobj_set_flag(probe_ctx_getresult(pfd->ctx), SYSCHAR_FLAG_ERROR);
ret = -2;
goto cleanup;
}
buf_used += ret;
} while (ret == buf_inc);
if (buf_used == buf_size)
buf = realloc(buf, ++buf_size);
buf[buf_used++] = '\0';
do {
char **substrs;
int want_instance;
next_inst = SEXP_number_newi_32(cur_inst + 1);
if (probe_entobj_cmp(pfd->instance_ent, next_inst) == OVAL_RESULT_TRUE)
want_instance = 1;
else
want_instance = 0;
SEXP_free(next_inst);
substr_cnt = get_substrings(buf, &ofs, pfd->compiled_regex, want_instance, &substrs);
if (substr_cnt > 0) {
++cur_inst;
if (want_instance) {
int k;
SEXP_t *item;
item = create_item(path, file, pfd->pattern,
cur_inst, substrs, substr_cnt);
probe_item_collect(pfd->ctx, item);
for (k = 0; k < substr_cnt; ++k)
oscap_free(substrs[k]);
oscap_free(substrs);
}
}
} while (substr_cnt > 0 && ofs < buf_used);
cleanup:
if (fd != -1)
close(fd);
oscap_free(buf);
if (whole_path != NULL)
oscap_free(whole_path);
return ret;
}
static int read_process(SEXP_t *cmd_ent, probe_ctx *ctx)
{
int err = 1;
DIR *d;
struct dirent *ent;
d = opendir("/proc");
if (d == NULL)
return err;
psinfo_t *psinfo;
// Scan the directories
while (( ent = readdir(d) )) {
int fd, len;
char buf[336];
int pid;
unsigned sched_policy;
SEXP_t *cmd_sexp;
// Skip non-process 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/psinfo", pid);
fd = open(buf, O_RDONLY, 0);
if (fd < 0)
continue;
len = read(fd, buf, sizeof buf);
close(fd);
if (len < 336)
continue;
// The psinfo file contains a psinfo struct; this typecast gets us the struct directly
psinfo = (psinfo_t *) buf;
err = 0; // If we get this far, no permission problems
dI("Have command: %s\n", psinfo->pr_fname);
cmd_sexp = SEXP_string_newf("%s", psinfo->pr_fname);
if (probe_entobj_cmp(cmd_ent, cmd_sexp) == OVAL_RESULT_TRUE) {
struct result_info r;
char tbuf[32], sbuf[32];
int tday,tyear;
time_t s_time;
struct tm *proc, *now;
const char *fmt;
int fixfmt_year;
r.scheduling_class = malloc(PRCLSZ);
strncpy(r.scheduling_class, (psinfo->pr_lwp).pr_clname, sizeof(r.scheduling_class));
// Get the start time
s_time = time(NULL);
now = localtime(&s_time);
tyear = now->tm_year;
tday = now->tm_yday;
// Get current time
s_time = psinfo->pr_start.tv_sec;
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 = psinfo->pr_fname;
r.exec_time = convert_time(psinfo->pr_time.tv_sec, tbuf, sizeof(tbuf));
r.pid = psinfo->pr_pid;
r.ppid = psinfo->pr_ppid;
r.priority = (psinfo->pr_lwp).pr_pri;
r.ruid = psinfo->pr_uid;
r.start_time = sbuf;
r.tty = oscap_sprintf("%s", psinfo->pr_ttydev);
r.user_id = psinfo->pr_euid;
report_finding(&r, ctx);
}
SEXP_free(cmd_sexp);
}
closedir(d);
return err;
}
static int read_process(SEXP_t *cmd_ent, probe_ctx *ctx)
{
int err = 1;
DIR *d;
struct dirent *ent;
d = opendir("/proc");
if (d == NULL)
return err;
// Get the time tick hertz
ticks = (unsigned long)sysconf(_SC_CLK_TCK);
get_boot_time();
// Scan the directories
while (( ent = readdir(d) )) {
int fd, len;
char buf[256];
char *tmp, cmd[16], 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;
// Skip non-process 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, 0, sizeof(cmd));
sscanf(buf, "%d (%15c", &ppid, cmd);
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;
err = 0; // If we get this far, no permission problems
dI("Have command: %s\n", cmd);
cmd_sexp = SEXP_string_newf("%s", cmd);
if (probe_entobj_cmp(cmd_ent, cmd_sexp) == OVAL_RESULT_TRUE) {
struct result_info r;
unsigned long t = uutime/ticks + ustime/ticks;
char tbuf[32], sbuf[32];
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 = 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;
get_uids(pid, &r);
report_finding(&r, ctx);
}
SEXP_free(cmd_sexp);
}
closedir(d);
return err;
}
static int read_environment(SEXP_t *pid_ent, SEXP_t *name_ent, probe_ctx *ctx)
{
int err = 1, pid, fd;
bool empty;
size_t env_name_size;
SEXP_t *env_name, *env_value, *item, *pid_sexp;
DIR *d;
struct dirent *d_entry;
char *buffer, env_file[256], *null_char;
ssize_t buffer_used;
size_t buffer_size;
d = opendir("/proc");
if (d == NULL) {
dE("Can't read /proc: errno=%d, %s.\n", errno, strerror (errno));
return PROBE_EACCESS;
}
if ((buffer = oscap_realloc(NULL, BUFFER_SIZE)) == NULL) {
dE("Can't allocate memory");
closedir(d);
return PROBE_EFAULT;
}
buffer_size = BUFFER_SIZE;
while ((d_entry = readdir(d))) {
if (strspn(d_entry->d_name, "0123456789") != strlen(d_entry->d_name))
continue;
pid = atoi(d_entry->d_name);
pid_sexp = SEXP_number_newi_32(pid);
if (probe_entobj_cmp(pid_ent, pid_sexp) != OVAL_RESULT_TRUE) {
SEXP_free(pid_sexp);
continue;
}
SEXP_free(pid_sexp);
sprintf(env_file, "/proc/%d/environ", pid);
if ((fd = open(env_file, O_RDONLY)) == -1) {
dE("Can't open \"%s\": errno=%d, %s.\n", env_file, errno, strerror (errno));
item = probe_item_create(
OVAL_INDEPENDENT_ENVIRONMENT_VARIABLE58, NULL,
"pid", OVAL_DATATYPE_INTEGER, (int64_t)pid,
NULL
);
probe_item_setstatus(item, SYSCHAR_STATUS_ERROR);
probe_item_add_msg(item, OVAL_MESSAGE_LEVEL_ERROR,
"Can't open \"%s\": errno=%d, %s.", env_file, errno, strerror (errno));
probe_item_collect(ctx, item);
continue;
}
empty = true;
if ((buffer_used = read(fd, buffer, buffer_size - 1)) > 0) {
empty = false;
}
while (! empty) {
while (! (null_char = memchr(buffer, 0, buffer_used))) {
ssize_t s;
if ((size_t)buffer_used >= buffer_size) {
buffer_size += BUFFER_SIZE;
buffer = oscap_realloc(buffer, buffer_size);
if (buffer == NULL) {
dE("Can't allocate memory");
exit(ENOMEM);
}
}
s = read(fd, buffer + buffer_used, buffer_size - buffer_used);
if (s <= 0) {
empty = true;
buffer[buffer_used++] = 0;
}
else {
buffer_used += s;
}
}
do {
char *eq_char = strchr(buffer, '=');
if (eq_char == NULL) {
/* strange but possible:
* $ strings /proc/1218/environ
/dev/input/event0 /dev/input/event1 /dev/input/event4 /dev/input/event3
*/
buffer_used -= null_char + 1 - buffer;
memmove(buffer, null_char + 1, buffer_used);
continue;
}
env_name_size = eq_char - buffer;
env_name = SEXP_string_new(buffer, env_name_size);
env_value = SEXP_string_newf("%s", buffer + env_name_size + 1);
if (probe_entobj_cmp(name_ent, env_name) == OVAL_RESULT_TRUE) {
item = probe_item_create(
OVAL_INDEPENDENT_ENVIRONMENT_VARIABLE58, NULL,
"pid", OVAL_DATATYPE_INTEGER, (int64_t)pid,
"name", OVAL_DATATYPE_SEXP, env_name,
"value", OVAL_DATATYPE_SEXP, env_value,
NULL);
probe_item_collect(ctx, item);
err = 0;
}
SEXP_free(env_name);
SEXP_free(env_value);
buffer_used -= null_char + 1 - buffer;
memmove(buffer, null_char + 1, buffer_used);
} while ((null_char = memchr(buffer, 0, buffer_used)));
}
close(fd);
}
closedir(d);
oscap_free(buffer);
if (err) {
SEXP_t *msg = probe_msg_creatf(OVAL_MESSAGE_LEVEL_ERROR,
"Can't find process with requested PID.");
probe_cobj_add_msg(probe_ctx_getresult(ctx), msg);
SEXP_free(msg);
err = 0;
}
return err;
}
static int file_cb (const char *p, const char *f, void *ptr)
{
char path_buffer[PATH_MAX];
SEXP_t *item, xattr_name;
struct cbargs *args = (struct cbargs *) ptr;
const char *st_path;
ssize_t xattr_count = -1;
char *xattr_buf = NULL;
size_t xattr_buflen = 0, i;
if (f == NULL) {
st_path = p;
} else {
snprintf (path_buffer, sizeof path_buffer, "%s/%s", p, f);
st_path = path_buffer;
}
SEXP_init(&xattr_name);
do {
/* estimate the size of the buffer */
xattr_count = llistxattr(st_path, NULL, 0);
if (xattr_count == 0)
return (0);
if (xattr_count < 0) {
dI("FAIL: llistxattr(%s, %p, %zu): errno=%u, %s.", errno, strerror(errno));
return 0;
}
/* allocate space for xattr names */
xattr_buflen = xattr_count;
xattr_buf = oscap_realloc(xattr_buf, sizeof(char) * xattr_buflen);
/* fill the buffer */
xattr_count = llistxattr(st_path, xattr_buf, xattr_buflen);
/* check & retry if needed */
} while (errno == ERANGE);
if (xattr_count < 0) {
dI("FAIL: llistxattr(%s, %p, %zu): errno=%u, %s.", errno, strerror(errno));
oscap_free(xattr_buf);
}
/* update lastpath if needed */
if (!SEXP_emptyp(&gr_lastpath)) {
if (SEXP_strcmp(&gr_lastpath, p) != 0) {
SEXP_free_r(&gr_lastpath);
SEXP_string_new_r(&gr_lastpath, p, strlen(p));
}
} else
SEXP_string_new_r(&gr_lastpath, p, strlen(p));
i = 0;
/* collect */
do {
SEXP_string_new_r(&xattr_name, xattr_buf + i, strlen(xattr_buf +i));
if (probe_entobj_cmp(args->attr_ent, &xattr_name) == OVAL_RESULT_TRUE) {
ssize_t xattr_vallen = -1;
char *xattr_val = NULL;
xattr_vallen = lgetxattr(st_path, xattr_buf + i, NULL, 0);
retry_value:
if (xattr_vallen >= 0) {
// Check possible buffer overflow
if (sizeof(char) * (xattr_vallen + 1) <= sizeof(char) * xattr_vallen) {
dE("Attribute is too long.");
abort();
}
// Allocate buffer, '+1' is for trailing '\0'
xattr_val = oscap_realloc(xattr_val, sizeof(char) * (xattr_vallen + 1));
// we don't want to override space for '\0' by call of 'lgetxattr'
// we pass only 'xattr_vallen' instead of 'xattr_vallen + 1'
xattr_vallen = lgetxattr(st_path, xattr_buf + i, xattr_val, xattr_vallen);
if (xattr_vallen < 0 || errno == ERANGE)
goto retry_value;
xattr_val[xattr_vallen] = '\0';
item = probe_item_create(OVAL_UNIX_FILEEXTENDEDATTRIBUTE, NULL,
"filepath", OVAL_DATATYPE_STRING, f == NULL ? NULL : st_path,
"path", OVAL_DATATYPE_SEXP, &gr_lastpath,
"filename", OVAL_DATATYPE_STRING, f == NULL ? "" : f,
"attribute_name", OVAL_DATATYPE_SEXP, &xattr_name,
"value", OVAL_DATATYPE_STRING, xattr_val,
NULL);
oscap_free(xattr_val);
} else {
dI("FAIL: lgetxattr(%s, %s, NULL, 0): errno=%u, %s.", errno, strerror(errno));
item = probe_item_create(OVAL_UNIX_FILEEXTENDEDATTRIBUTE, NULL, NULL);
probe_item_setstatus(item, SYSCHAR_STATUS_ERROR);
if (xattr_val != NULL)
oscap_free(xattr_val);
}
probe_item_collect(args->ctx, item); /* XXX: handle ENOMEM */
}
SEXP_free_r(&xattr_name);
/* skip to next name */
while (i < xattr_buflen && xattr_buf[i] != '\0')
++i;
++i;
} while (xattr_buf + i < xattr_buf + xattr_buflen - 1);
oscap_free(xattr_buf);
return (0);
}
static int rpmverify_collect(probe_ctx *ctx,
const char *name, oval_operation_t name_op,
const char *file, oval_operation_t file_op,
SEXP_t *name_ent, SEXP_t *filepath_ent,
uint64_t flags,
void (*callback)(probe_ctx *, struct rpmverify_res *))
{
rpmdbMatchIterator match;
rpmVerifyAttrs omit = (rpmVerifyAttrs)(flags & RPMVERIFY_RPMATTRMASK);
Header pkgh;
pcre *re = NULL;
int ret = -1;
/* pre-compile regex if needed */
if (file_op == OVAL_OPERATION_PATTERN_MATCH) {
const char *errmsg;
int erroff;
re = pcre_compile(file, PCRE_UTF8, &errmsg, &erroff, NULL);
if (re == NULL) {
/* TODO */
return (-1);
}
}
RPMVERIFY_LOCK;
switch (name_op) {
case OVAL_OPERATION_EQUALS:
match = rpmtsInitIterator (g_rpm.rpmts, RPMTAG_NAME, (const void *)name, 0);
if (match == NULL) {
ret = 0;
goto ret;
}
ret = rpmdbGetIteratorCount (match);
break;
case OVAL_OPERATION_NOT_EQUAL:
match = rpmtsInitIterator (g_rpm.rpmts, RPMDBI_PACKAGES, NULL, 0);
if (match == NULL) {
ret = 0;
goto ret;
}
if (rpmdbSetIteratorRE (match, RPMTAG_NAME, RPMMIRE_GLOB, "*") != 0)
{
ret = -1;
goto ret;
}
break;
case OVAL_OPERATION_PATTERN_MATCH:
match = rpmtsInitIterator (g_rpm.rpmts, RPMDBI_PACKAGES, NULL, 0);
if (match == NULL) {
ret = 0;
goto ret;
}
if (rpmdbSetIteratorRE (match, RPMTAG_NAME, RPMMIRE_REGEX,
(const char *)name) != 0)
{
ret = -1;
goto ret;
}
break;
default:
/* not supported */
dE("package name: operation not supported");
ret = -1;
goto ret;
}
assume_d(RPMTAG_BASENAMES != 0, -1);
assume_d(RPMTAG_DIRNAMES != 0, -1);
while ((pkgh = rpmdbNextIterator (match)) != NULL) {
rpmfi fi;
rpmTag tag[2] = { RPMTAG_BASENAMES, RPMTAG_DIRNAMES };
struct rpmverify_res res;
errmsg_t rpmerr;
int i;
SEXP_t *name_sexp;
res.name = headerFormat(pkgh, "%{NAME}", &rpmerr);
name_sexp = SEXP_string_newf("%s", res.name);
if (probe_entobj_cmp(name_ent, name_sexp) != OVAL_RESULT_TRUE) {
SEXP_free(name_sexp);
continue;
}
SEXP_free(name_sexp);
/*
* Inspect package files & directories
*/
for (i = 0; i < 2; ++i) {
fi = rpmfiNew(g_rpm.rpmts, pkgh, tag[i], 1);
while (rpmfiNext(fi) != -1) {
SEXP_t *filepath_sexp;
res.fflags = rpmfiFFlags(fi);
res.oflags = omit;
if (((res.fflags & RPMFILE_CONFIG) && (flags & RPMVERIFY_SKIP_CONFIG)) ||
((res.fflags & RPMFILE_GHOST) && (flags & RPMVERIFY_SKIP_GHOST)))
continue;
res.file = strdup(rpmfiFN(fi));
filepath_sexp = SEXP_string_newf("%s", res.file);
if (probe_entobj_cmp(filepath_ent, filepath_sexp) != OVAL_RESULT_TRUE) {
SEXP_free(filepath_sexp);
free(res.file);
continue;
}
SEXP_free(filepath_sexp);
if (rpmVerifyFile(g_rpm.rpmts, fi, &res.vflags, omit) != 0)
res.vflags = RPMVERIFY_FAILURES;
callback(ctx, &res);
free(res.file);
}
rpmfiFree(fi);
}
}
match = rpmdbFreeIterator (match);
ret = 0;
ret:
if (re != NULL)
pcre_free(re);
RPMVERIFY_UNLOCK;
return (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;
}
static int get_runlevel_sysv (struct runlevel_req *req, struct runlevel_rep **rep, bool suse, const char *init_path, const char *rc_path)
{
const char runlevel_list[] = {'0', '1', '2', '3', '4', '5', '6'};
char pathbuf[PATH_MAX];
DIR *init_dir, *rc_dir;
struct dirent *init_dp, *rc_dp;
struct stat init_st, rc_st;
struct runlevel_rep *rep_lst = NULL;
_A(req != NULL);
_A(rep != NULL);
init_dir = opendir(init_path);
if (init_dir == NULL) {
dI("Can't open directory \"%s\": errno=%d, %s.",
init_path, errno, strerror (errno));
return (-1);
}
while ((init_dp = readdir(init_dir)) != NULL) {
char *service_name;
unsigned int i;
SEXP_t *r0;
// Ensure that we are in the expected directory before
// touching relative paths
if (fchdir(dirfd(init_dir)) != 0) {
dI("Can't fchdir to \"%s\": errno=%d, %s.",
init_path, errno, strerror (errno));
closedir(init_dir);
return -1;
}
if (stat(init_dp->d_name, &init_st) != 0) {
dI("Can't stat file %s/%s: errno=%d, %s.",
init_path, init_dp->d_name, errno, strerror(errno));
continue;
}
r0 = SEXP_string_newf("%s", init_dp->d_name);
if (probe_entobj_cmp(req->service_name_ent, r0) != OVAL_RESULT_TRUE) {
SEXP_free(r0);
continue;
}
SEXP_free(r0);
service_name = init_dp->d_name;
for (i = 0; i < (sizeof (runlevel_list) / sizeof (runlevel_list[0])); ++i) {
char runlevel[2] = {'\0', '\0'};
bool start, kill;
r0 = SEXP_string_newf("%c", runlevel_list[i]);
if (probe_entobj_cmp(req->runlevel_ent, r0) != OVAL_RESULT_TRUE) {
SEXP_free(r0);
continue;
}
SEXP_free(r0);
runlevel[0] = runlevel_list[i];
snprintf(pathbuf, sizeof (pathbuf), rc_path, runlevel_list[i]);
rc_dir = opendir(pathbuf);
if (rc_dir == NULL) {
dI("Can't open directory \"%s\": errno=%d, %s.",
rc_path, errno, strerror (errno));
continue;
}
if (chdir(pathbuf) != 0) {
dI("Can't fchdir to \"%s\": errno=%d, %s.",
rc_path, errno, strerror (errno));
closedir(rc_dir);
continue;
}
// On SUSE, the presence of a symbolic link to the init.d/<service> in
// a runlevel directory rcx.d implies that the sevice is started on x.
if (suse) {
start = false;
kill = true;
}
else
start = kill = false;
while ((rc_dp = readdir(rc_dir)) != NULL) {
if (stat(rc_dp->d_name, &rc_st) != 0) {
dI("Can't stat file %s/%s: errno=%d, %s.",
rc_path, rc_dp->d_name, errno, strerror(errno));
continue;
}
if (init_st.st_ino == rc_st.st_ino) {
if (suse) {
if (rc_dp->d_name[0] == 'S') {
start = true;
kill = false;
break;
}
}
else {
if (rc_dp->d_name[0] == 'S') {
start = true;
break;
} else if (rc_dp->d_name[0] == 'K') {
kill = true;
break;
} else {
dI("Unexpected character in filename: %c, %s/%s.",
rc_dp->d_name[0], pathbuf, rc_dp->d_name);
}
}
}
}
closedir(rc_dir);
if (rep_lst == NULL) {
rep_lst = *rep = oscap_alloc(sizeof (struct runlevel_rep));
} else {
rep_lst->next = oscap_alloc(sizeof (struct runlevel_rep));
rep_lst = rep_lst->next;
}
rep_lst->service_name = strdup(service_name);
rep_lst->runlevel = strdup(runlevel);
rep_lst->start = start;
rep_lst->kill = kill;
rep_lst->next = NULL;
}
}
closedir(init_dir);
return (1);
}
