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pam_systemd: port to libsystemd-bus

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This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2013-11-05 00:01:12 -05:00
parent 05a049cc44
commit ffcfcb6b2c
2 changed files with 87 additions and 142 deletions
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5
Makefile.am
View File

@ -4010,7 +4010,6 @@ pam_systemd_la_SOURCES = \
pam_systemd_la_CFLAGS = \
$(AM_CFLAGS) \
$(PAM_CFLAGS) \
$(DBUS_CFLAGS) \
-fvisibility=hidden
pam_systemd_la_LDFLAGS = \
@ -4023,9 +4022,9 @@ pam_systemd_la_LDFLAGS = \
pam_systemd_la_LIBADD = \
libsystemd-audit.la \
libsystemd-dbus.la \
libsystemd-bus.la \
libsystemd-shared.la \
libsystemd-daemon-internal.la \
libsystemd-daemon.la \
$(RT_LIBS) \
$(PAM_LIBS)

224
src/login/pam-module.c
View File

@ -36,7 +36,7 @@
#include "audit.h"
#include "macro.h"
#include "strv.h"
#include "dbus-common.h"
#include "bus-util.h"
#include "def.h"
#include "socket-util.h"
#include "fileio.h"
@ -181,20 +181,18 @@ _public_ PAM_EXTERN int pam_sm_open_session(
struct passwd *pw;
bool debug = false;
const char *username, *id, *object_path, *runtime_path, *service = NULL, *tty = NULL, *display = NULL, *remote_user = NULL, *remote_host = NULL, *seat = NULL, *type = NULL, *class = NULL, *class_pam = NULL, *cvtnr = NULL;
DBusError error;
uint32_t uid, pid;
DBusMessageIter iter, sub;
int session_fd = -1;
DBusConnection *bus = NULL;
DBusMessage *m = NULL, *reply = NULL;
dbus_bool_t remote, existing;
int r;
bool remote, existing;
uint32_t vtnr = 0;
int r;
_cleanup_bus_unref_ sd_bus *bus = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
assert(handle);
dbus_error_init(&error);
if (debug)
pam_syslog(handle, LOG_INFO, "pam-systemd initializing");
@ -224,50 +222,27 @@ _public_ PAM_EXTERN int pam_sm_open_session(
if (streq_ptr(service, "systemd-user")) {
_cleanup_free_ char *p = NULL, *rt = NULL;
if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) pw->pw_uid) < 0) {
r = PAM_BUF_ERR;
goto finish;
}
if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) pw->pw_uid) < 0)
return PAM_BUF_ERR;
r = parse_env_file(p, NEWLINE,
"RUNTIME", &rt,
NULL);
if (r < 0 && r != -ENOENT) {
r = PAM_SESSION_ERR;
goto finish;
}
if (r < 0 && r != -ENOENT)
return PAM_SESSION_ERR;
if (rt) {
r = pam_misc_setenv(handle, "XDG_RUNTIME_DIR", rt, 0);
if (r != PAM_SUCCESS) {
pam_syslog(handle, LOG_ERR, "Failed to set runtime dir.");
goto finish;
return r;
}
}
r = PAM_SUCCESS;
goto finish;
return PAM_SUCCESS;
}
dbus_connection_set_change_sigpipe(FALSE);
bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
if (!bus) {
pam_syslog(handle, LOG_ERR, "Failed to connect to system bus: %s", bus_error_message(&error));
r = PAM_SESSION_ERR;
goto finish;
}
m = dbus_message_new_method_call(
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"CreateSession");
if (!m) {
pam_syslog(handle, LOG_ERR, "Could not allocate create session message.");
r = PAM_BUF_ERR;
goto finish;
}
/* Otherwise, we ask logind to create a session for us */
uid = pw->pw_uid;
pid = getpid();
@ -342,32 +317,12 @@ _public_ PAM_EXTERN int pam_sm_open_session(
!streq(remote_host, "localhost") &&
!streq(remote_host, "localhost.localdomain");
if (!dbus_message_append_args(m,
DBUS_TYPE_UINT32, &uid,
DBUS_TYPE_UINT32, &pid,
DBUS_TYPE_STRING, &service,
DBUS_TYPE_STRING, &type,
DBUS_TYPE_STRING, &class,
DBUS_TYPE_STRING, &seat,
DBUS_TYPE_UINT32, &vtnr,
DBUS_TYPE_STRING, &tty,
DBUS_TYPE_STRING, &display,
DBUS_TYPE_BOOLEAN, &remote,
DBUS_TYPE_STRING, &remote_user,
DBUS_TYPE_STRING, &remote_host,
DBUS_TYPE_INVALID)) {
pam_syslog(handle, LOG_ERR, "Could not attach parameters to message.");
r = PAM_BUF_ERR;
goto finish;
}
/* Talk to logind over the message bug */
dbus_message_iter_init_append(m, &iter);
if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sv)", &sub) ||
!dbus_message_iter_close_container(&iter, &sub)) {
pam_syslog(handle, LOG_ERR, "Could not attach parameters to message.");
r = PAM_BUF_ERR;
goto finish;
r = sd_bus_open_system(&bus);
if (r < 0) {
pam_syslog(handle, LOG_ERR, "Failed to connect to system bus: %s", strerror(-r));
return PAM_SESSION_ERR;
}
if (debug)
@ -375,23 +330,47 @@ _public_ PAM_EXTERN int pam_sm_open_session(
"uid=%u pid=%u service=%s type=%s class=%s seat=%s vtnr=%u tty=%s display=%s remote=%s remote_user=%s remote_host=%s",
uid, pid, service, type, class, seat, vtnr, tty, display, yes_no(remote), remote_user, remote_host);
reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
if (!reply) {
pam_syslog(handle, LOG_ERR, "Failed to create session: %s", bus_error_message(&error));
r = PAM_SESSION_ERR;
goto finish;
r = sd_bus_call_method(bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"CreateSession",
&error,
&reply,
"uussssussbssa(sv)",
uid,
pid,
service,
type,
class,
seat,
vtnr,
tty,
display,
remote,
remote_user,
remote_host,
0);
if (r < 0) {
pam_syslog(handle, LOG_ERR, "Failed to communicate with systemd-logind: %s", strerror(-r));
if (error.name || error.message)
pam_syslog(handle, LOG_ERR, "systemd-logind returned %s: %s",
error.name ?: "unknown error",
error.message ?: "no message");
return PAM_SYSTEM_ERR;
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_STRING, &id,
DBUS_TYPE_OBJECT_PATH, &object_path,
DBUS_TYPE_STRING, &runtime_path,
DBUS_TYPE_UNIX_FD, &session_fd,
DBUS_TYPE_STRING, &seat,
DBUS_TYPE_UINT32, &vtnr,
DBUS_TYPE_BOOLEAN, &existing,
DBUS_TYPE_INVALID)) {
pam_syslog(handle, LOG_ERR, "Failed to parse message: %s", bus_error_message(&error));
r = sd_bus_message_read(reply,
"soshsub",
&id,
&object_path,
&runtime_path,
&session_fd,
&seat,
&vtnr,
&existing);
if (r < 0) {
pam_syslog(handle, LOG_ERR, "Failed to parse message: %s", strerror(-r));
r = PAM_SESSION_ERR;
goto finish;
}
@ -436,35 +415,20 @@ _public_ PAM_EXTERN int pam_sm_open_session(
r = pam_set_data(handle, "systemd.existing", INT_TO_PTR(!!existing), NULL);
if (r != PAM_SUCCESS) {
pam_syslog(handle, LOG_ERR, "Failed to install existing flag.");
return r;
goto finish;
}
if (session_fd >= 0) {
r = pam_set_data(handle, "systemd.session-fd", INT_TO_PTR(session_fd+1), NULL);
if (r != PAM_SUCCESS) {
pam_syslog(handle, LOG_ERR, "Failed to install session fd.");
return r;
goto finish;
}
}
session_fd = -1;
r = PAM_SUCCESS;
return PAM_SUCCESS;
finish:
dbus_error_free(&error);
if (bus) {
dbus_connection_close(bus);
dbus_connection_unref(bus);
}
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
if (session_fd >= 0)
close_nointr_nofail(session_fd);
@ -478,14 +442,13 @@ _public_ PAM_EXTERN int pam_sm_close_session(
const void *p = NULL, *existing = NULL;
const char *id;
DBusConnection *bus = NULL;
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
assert(handle);
_cleanup_bus_unref_ sd_bus *bus = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
dbus_error_init(&error);
assert(handle);
/* Only release session if it wasn't pre-existing when we
* tried to create it */
@ -499,35 +462,31 @@ _public_ PAM_EXTERN int pam_sm_close_session(
* that it doesn't just go and slaughter us
* immediately after closing the fd */
bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
if (!bus) {
pam_syslog(handle, LOG_ERR, "Failed to connect to system bus: %s", bus_error_message(&error));
r = sd_bus_open_system(&bus);
if (r < 0) {
pam_syslog(handle, LOG_ERR,
"Failed to connect to system bus: %s", strerror(-r));
r = PAM_SESSION_ERR;
goto finish;
}
m = dbus_message_new_method_call(
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"ReleaseSession");
if (!m) {
pam_syslog(handle, LOG_ERR, "Could not allocate release session message.");
r = PAM_BUF_ERR;
goto finish;
}
r = sd_bus_call_method(bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"ReleaseSession",
&error,
NULL,
"s",
id);
if (r < 0) {
pam_syslog(handle, LOG_ERR,
"Failed to release session: %s", strerror(-r));
if (error.name || error.message)
pam_syslog(handle, LOG_ERR, "systemd-logind returned %s: %s",
error.name ?: "unknown error",
error.message ?: "no message");
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &id,
DBUS_TYPE_INVALID)) {
pam_syslog(handle, LOG_ERR, "Could not attach parameters to message.");
r = PAM_BUF_ERR;
goto finish;
}
reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
if (!reply) {
pam_syslog(handle, LOG_ERR, "Failed to release session: %s", bus_error_message(&error));
r = PAM_SESSION_ERR;
goto finish;
}
@ -540,18 +499,5 @@ finish:
if (p)
close_nointr(PTR_TO_INT(p) - 1);
dbus_error_free(&error);
if (bus) {
dbus_connection_close(bus);
dbus_connection_unref(bus);
}
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
return r;
}