#include "def.h"
#include "capability.h"
#include "bus-policy.h"
+#include "bus-control.h"
+#include "smack-util.h"
static char *arg_address = NULL;
static char *arg_command_line_buffer = NULL;
if (!sd_bus_message_has_signature(m, ""))
return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
- r = sd_bus_get_owner_id(a, &server_id);
+ r = sd_bus_get_bus_id(a, &server_id);
if (r < 0)
return synthetic_reply_method_errno(m, r, NULL);
return 0;
if (from->is_kernel) {
- uid_t sender_uid = (uid_t) -1;
- gid_t sender_gid = (gid_t) -1;
+ uid_t sender_uid = UID_INVALID;
+ gid_t sender_gid = GID_INVALID;
char **sender_names = NULL;
bool granted = false;
}
if (granted) {
- /* Then check whether us, the recipient can recieve from the sender's name */
+ /* Then check whether us (the recipient) can recieve from the sender's name */
if (strv_isempty(sender_names)) {
if (policy_check_recv(policy, our_ucred->uid, our_ucred->gid, m->header->type, NULL, m->path, m->interface, m->member))
return 0;
if (to->is_kernel) {
_cleanup_bus_creds_unref_ sd_bus_creds *destination_creds = NULL;
- uid_t destination_uid = (uid_t) -1;
- gid_t destination_gid = (gid_t) -1;
+ uid_t destination_uid = UID_INVALID;
+ gid_t destination_gid = GID_INVALID;
const char *destination_unique = NULL;
char **destination_names = NULL;
bool granted = false;
/* The message came from the legacy client, and is sent to kdbus. */
if (m->destination) {
- r = sd_bus_get_name_creds(to, m->destination,
- SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME|
- SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID, &destination_creds);
+ r = bus_get_name_creds_kdbus(to, m->destination,
+ SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME|
+ SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID,
+ true, &destination_creds);
if (r < 0)
return r;
(void) sd_bus_creds_get_gid(destination_creds, &destination_gid);
}
- /* First check if we, the sender can send to this name */
+ /* First check if we (the sender) can send to this name */
if (strv_isempty(destination_names)) {
if (policy_check_send(policy, our_ucred->uid, our_ucred->gid, m->header->type, NULL, m->path, m->interface, m->member))
granted = true;
return 0;
r = sd_bus_message_new_method_return(m, &n);
- if (r < 0) {
- log_error_errno(r, "Failed to generate HELLO reply: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to generate HELLO reply: %m");
r = sd_bus_message_append(n, "s", a->unique_name);
- if (r < 0) {
- log_error_errno(r, "Failed to append unique name to HELLO reply: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to append unique name to HELLO reply: %m");
r = bus_message_append_sender(n, "org.freedesktop.DBus");
- if (r < 0) {
- log_error_errno(r, "Failed to append sender to HELLO reply: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to append sender to HELLO reply: %m");
r = bus_seal_synthetic_message(b, n);
- if (r < 0) {
- log_error_errno(r, "Failed to seal HELLO reply: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to seal HELLO reply: %m");
r = sd_bus_send(b, n, NULL);
- if (r < 0) {
- log_error_errno(r, "Failed to send HELLO reply: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to send HELLO reply: %m");
n = sd_bus_message_unref(n);
r = sd_bus_message_new_signal(
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
"NameAcquired");
- if (r < 0) {
- log_error_errno(r, "Failed to allocate initial NameAcquired message: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate initial NameAcquired message: %m");
r = sd_bus_message_append(n, "s", a->unique_name);
- if (r < 0) {
- log_error_errno(r, "Failed to append unique name to NameAcquired message: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to append unique name to NameAcquired message: %m");
r = bus_message_append_sender(n, "org.freedesktop.DBus");
- if (r < 0) {
- log_error_errno(r, "Failed to append sender to NameAcquired message: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to append sender to NameAcquired message: %m");
r = bus_seal_synthetic_message(b, n);
- if (r < 0) {
- log_error_errno(r, "Failed to seal NameAcquired message: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to seal NameAcquired message: %m");
r = sd_bus_send(b, n, NULL);
- if (r < 0) {
- log_error_errno(r, "Failed to send NameAcquired message: %m");
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to send NameAcquired message: %m");
return 1;
}
return 0;
}
+static int mac_smack_apply_label_and_drop_cap_mac_admin(pid_t its_pid, const char *new_label) {
+#ifdef HAVE_SMACK
+ int r = 0, k;
+
+ if (!mac_smack_use())
+ return 0;
+
+ if (new_label && its_pid > 0)
+ r = mac_smack_apply_pid(its_pid, new_label);
+
+ k = drop_capability(CAP_MAC_ADMIN);
+ return r < 0 ? r : k;
+#else
+ return 0;
+#endif
+}
+
int main(int argc, char *argv[]) {
_cleanup_bus_close_unref_ sd_bus *a = NULL, *b = NULL;
if (is_unix) {
(void) getpeercred(in_fd, &ucred);
(void) getpeersec(in_fd, &peersec);
+
+ r = mac_smack_apply_label_and_drop_cap_mac_admin(getpid(), peersec);
+ if (r < 0)
+ log_warning_errno(r, "Failed to set SMACK label (%s) and drop CAP_MAC_ADMIN: %m", peersec);
}
if (arg_drop_privileges) {
a->fake_pids_valid = true;
a->fake_creds.uid = ucred.uid;
- a->fake_creds.euid = (uid_t) -1;
- a->fake_creds.suid = (uid_t) -1;
- a->fake_creds.fsuid = (uid_t) -1;
+ a->fake_creds.euid = UID_INVALID;
+ a->fake_creds.suid = UID_INVALID;
+ a->fake_creds.fsuid = UID_INVALID;
a->fake_creds.gid = ucred.gid;
- a->fake_creds.egid = (gid_t) -1;
- a->fake_creds.sgid = (gid_t) -1;
- a->fake_creds.fsgid = (gid_t) -1;
+ a->fake_creds.egid = GID_INVALID;
+ a->fake_creds.sgid = GID_INVALID;
+ a->fake_creds.fsgid = GID_INVALID;
a->fake_creds_valid = true;
}
goto finish;
}
- r = sd_bus_get_owner_id(a, &server_id);
+ r = sd_bus_get_bus_id(a, &server_id);
if (r < 0) {
log_error_errno(r, "Failed to get server ID: %m");
goto finish;
}
policy = &policy_buffer;
- policy_dump(policy);
+ /* policy_dump(policy); */
if (!policy_check_hello(policy, ucred.uid, ucred.gid)) {
r = log_error_errno(EPERM, "Policy denied connection.");
r = ppoll(pollfd, 3, ts, NULL);
if (r < 0) {
- log_error("ppoll() failed: %m");
+ log_error_errno(errno, "ppoll() failed: %m");
goto finish;
}
}