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Diffstat (limited to 'src/core/selinux-access.c')
-rw-r--r--src/core/selinux-access.c208
1 files changed, 56 insertions, 152 deletions
diff --git a/src/core/selinux-access.c b/src/core/selinux-access.c
index fc1df866cf..b207b0d32a 100644
--- a/src/core/selinux-access.c
+++ b/src/core/selinux-access.c
@@ -1,4 +1,3 @@
-
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
@@ -31,6 +30,7 @@
#include "dbus-unit.h"
#include "bus-errors.h"
#include "dbus-common.h"
+#include "audit.h"
#include <stdio.h>
#include <string.h>
@@ -212,49 +212,6 @@ finish:
return r;
}
-static int get_cmdline(pid_t pid, char **cmdline) {
- char buf[PATH_MAX];
- FILE *f;
- int count;
- int n;
-
- snprintf(buf, sizeof(buf), "/proc/%lu/cmdline", (unsigned long) pid);
- f = fopen(buf, "re");
- if (!f) {
- return -errno;
- }
- count = fread(buf, 1, sizeof(buf), f);
- fclose(f);
- if (! count) {
- return -errno;
- }
- for (n = 0; n < count - 1; n++)
- {
- if (buf[n] == '\0')
- buf[n] = ' ';
- }
- (*cmdline) = strdup(buf);
- if (! (*cmdline)) {
- return -errno;
- }
- return 0;
-}
-
-static int get_pid_id(pid_t pid, const char *file, uid_t *id) {
- char buf[PATH_MAX];
- int r = 0;
- FILE *f;
- snprintf(buf, sizeof(buf), "/proc/%lu/%s", (unsigned long) pid, file);
- f = fopen(buf, "re");
- if (!f)
- return -errno;
- fscanf(f, "%d", id);
- if (ferror(f))
- r = -errno;
- fclose(f);
- return r;
-}
-
/* This mimics dbus_bus_get_unix_user() */
static int bus_get_audit_data(
DBusConnection *connection,
@@ -263,74 +220,29 @@ static int bus_get_audit_data(
DBusError *error) {
pid_t pid;
- DBusMessage *m = NULL, *reply = NULL;
- int r = -1;
-
- m = dbus_message_new_method_call(
- DBUS_SERVICE_DBUS,
- DBUS_PATH_DBUS,
- DBUS_INTERFACE_DBUS,
- "GetConnectionUnixProcessID");
- if (!m) {
- r = -errno;
- dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL);
- goto finish;
- }
-
- r = dbus_message_append_args(
- m,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_INVALID);
- if (!r) {
- r = -errno;
- dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL);
- goto finish;
- }
-
- reply = dbus_connection_send_with_reply_and_block(connection, m, -1, error);
- if (!reply) {
- r = -errno;
- goto finish;
- }
-
- r = dbus_set_error_from_message(error, reply);
- if (!r) {
- r = -errno;
- goto finish;
- }
+ int r;
- r = dbus_message_get_args(
- reply, error,
- DBUS_TYPE_UINT32, &pid,
- DBUS_TYPE_INVALID);
- if (!r) {
- r = -errno;
- goto finish;
- }
+ pid = bus_get_unix_process_id(connection, name, error);
+ if (pid <= 0)
+ return -EINVAL;
- r = get_pid_id(pid, "loginuid", &(audit->loginuid));
- if (r)
- goto finish;
+ r = audit_loginuid_from_pid(pid, &audit->loginuid);
+ if (r < 0)
+ return r;
- r = get_pid_id(pid, "uid", &(audit->uid));
- if (r)
- goto finish;
+ r = get_process_uid(pid, &audit->uid);
+ if (r < 0)
+ return r;
- r = get_pid_id(pid, "gid", &(audit->gid));
- if (r)
- goto finish;
+ r = get_process_gid(pid, &audit->gid);
+ if (r < 0)
+ return r;
- r = get_cmdline(pid, &(audit->cmdline));
- if (r)
- goto finish;
+ r = get_process_cmdline(pid, LINE_MAX, true, &audit->cmdline);
+ if (r < 0)
+ return r;
- r = 0;
-finish:
- if (m)
- dbus_message_unref(m);
- if (reply)
- dbus_message_unref(reply);
- return r;
+ return 0;
}
/*
@@ -435,49 +347,38 @@ static int get_audit_data(
DBusError *error) {
const char *sender;
- int r = -1;
+ int r;
sender = dbus_message_get_sender(message);
- if (sender) {
- r = bus_get_audit_data(
- connection,
- sender,
- audit,
- error);
- if (r)
- goto finish;
- } else {
+ if (sender)
+ return bus_get_audit_data(connection, sender, audit, error);
+ else {
int fd;
struct ucred ucred;
socklen_t len;
- r = dbus_connection_get_unix_fd(connection, &fd);
- if (!r) {
- r = -EINVAL;
- goto finish;
- }
+
+ if (!dbus_connection_get_unix_fd(connection, &fd))
+ return -EINVAL;
r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &len);
if (r < 0) {
- r = -errno;
log_error("Failed to determine peer credentials: %m");
- goto finish;
+ return -errno;
}
+
audit->uid = ucred.uid;
audit->gid = ucred.gid;
- r = get_pid_id(ucred.pid, "loginuid", &(audit->loginuid));
- if (r)
- goto finish;
-
- r = get_cmdline(ucred.pid, &(audit->cmdline));
- if (r)
- goto finish;
- }
+ r = audit_loginuid_from_pid(ucred.pid, &audit->loginuid);
+ if (r < 0)
+ return r;
- r = 0;
+ r = get_process_cmdline(ucred.pid, LINE_MAX, true, &audit->cmdline);
+ if (r < 0)
+ return r;
-finish:
- return r;
+ return 0;
+ }
}
/*
@@ -561,7 +462,9 @@ static int selinux_access_check(DBusConnection *connection, DBusMessage *message
int r = 0;
const char *tclass = NULL;
struct auditstruct audit;
- audit.uid = audit.loginuid = audit.gid = -1;
+
+ audit.uid = audit.loginuid = (uid_t) -1;
+ audit.gid = (gid_t) -1;
audit.cmdline = NULL;
audit.path = path;
@@ -589,9 +492,9 @@ static int selinux_access_check(DBusConnection *connection, DBusMessage *message
(void) get_audit_data(connection, message, &audit, error);
- errno=0;
+ errno= 0;
r = selinux_check_access(scon, fcon, tclass, perm, &audit);
- if ( r < 0) {
+ if (r < 0) {
r = -errno;
log_error("SELinux Denied \"%s\"", audit.cmdline);
@@ -622,21 +525,23 @@ void selinux_access_finish(void) {
int selinux_unit_access_check(DBusConnection *connection, DBusMessage *message, Manager *m, const char *path, DBusError *error) {
const char *perm;
int require_unit;
- const char *member = dbus_message_get_member(message);
+ const char *member;
int r;
r = selinux_init(m, error);
- if (r)
+ if (r < 0)
return r;
if (! selinux_enabled)
return 0;
+ member = dbus_message_get_member(message);
+
selinux_perm_lookup(member, &perm, &require_unit);
log_debug("SELinux dbus-unit Look %s up perm %s require_unit %d", member, perm, require_unit);
r = selinux_access_check(connection, message, m, error, perm, path);
- if ((r < 0) && (!selinux_enforcing)) {
+ if (r < 0 && !selinux_enforcing) {
dbus_error_init(error);
r = 0;
}
@@ -652,7 +557,7 @@ int selinux_manager_access_check(DBusConnection *connection, DBusMessage *messag
char *path = NULL;
r = selinux_init(m, error);
- if (r)
+ if (r < 0)
return r;
if (! selinux_enabled)
@@ -667,21 +572,19 @@ int selinux_manager_access_check(DBusConnection *connection, DBusMessage *messag
const char *name;
Unit *u;
- r = dbus_message_get_args(
+ if (!dbus_message_get_args(
message,
error,
DBUS_TYPE_STRING, &name,
- DBUS_TYPE_INVALID);
- if (!r)
+ DBUS_TYPE_INVALID)) {
+ r = -EINVAL;
goto finish;
+ }
- u = manager_get_unit(m, name);
- if ( !u ) {
- if ((r = manager_load_unit(m, name, NULL, error, &u)) < 0) {
- r = -errno;
- dbus_set_error(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
- goto finish;
- }
+ r = manager_load_unit(m, name, NULL, error, &u);
+ if (r < 0) {
+ dbus_set_error(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
+ goto finish;
}
path = u->source_path ? u->source_path : u->fragment_path;
@@ -706,5 +609,6 @@ int selinux_manager_access_check(DBusConnection *connection, DBusMessage *messag
return 0;
}
-void selinux_access_finish(void) {}
+void selinux_access_finish(void) {
+}
#endif
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 00:36:35 +0000