neocturne/pam_network_manager
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compare: neocturne:6ae9a6a1642fcaf808c934931139484776a56a9a
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9 changed files with 106 additions and 362 deletions
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2
.gitignore vendored
View file

@ -1 +1,3 @@
*~
pam_wlan.so
pam_wlan_test

44
CMakeLists.txt
View file

@ -1,44 +0,0 @@
cmake_minimum_required(VERSION 2.8.3)
project(PAM_NETWORK_MANAGER C)
set(CMAKE_MODULE_PATH ${PAM_NETWORK_MANAGER_SOURCE_DIR})
find_package(PAM REQUIRED)
find_package(libnm_glib REQUIRED)
set(PAM_MODULE_DIR "${CMAKE_INSTALL_PREFIX}/lib/security" CACHE STRING "PAM module directory")
set(PAM_NETWORK_MANAGER_HELPER_DIR "${CMAKE_INSTALL_PREFIX}/lib/security/pam_network_manager" CACHE STRING "pam_network_manager_helper install directory")
set(CONNECTION_TIMEOUT "10" CACHE STRING "Connection timeout")
set(CONNECTION_ID "" CACHE STRING "Connection ID")
set(CONNECTION_UUID "" CACHE STRING "Connection UUID")
set(CONNECTION_SSID "" CACHE STRING "Connection SSID")
set(CONNECTION_AUTH_ALG "open" CACHE STRING "Connection authentication algorithm")
set(CONNECTION_KEY_MGMT "wpa-eap" CACHE STRING "Connection key management method")
set(CONNECTION_EAP "ttls" CACHE STRING "Connection EAP method")
set(CONNECTION_PHASE2_AUTHEAP "mschapv2" CACHE STRING "Connection EAP phase2 authentication method")
include_directories(${CMAKE_CURRENT_BINARY_DIR} ${PAM_INCLUDE_DIR} ${LIBNM_GLIB_INCLUDE_DIRS})
link_directories(${LIBNM_GLIB_LIBRARY_DIRS})
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.h.in ${CMAKE_CURRENT_BINARY_DIR}/config.h)
add_executable(pam_network_manager_helper pam_network_manager_helper.c)
set_property(TARGET pam_network_manager_helper PROPERTY COMPILE_DEFINITIONS "_DEFAULT_SOURCE;_BSD_SOURCE")
set_property(TARGET pam_network_manager_helper PROPERTY COMPILE_FLAGS "-std=c99 -Wall ${LIBNM_GLIB_CFLAGS_OTHER}")
set_property(TARGET pam_network_manager_helper PROPERTY LINK_FLAGS "${LIBNM_GLIB_LDFLAGS_OTHER}")
target_link_libraries(pam_network_manager_helper ${LIBNM_GLIB_LIBRARIES})
add_executable(pam_network_manager_test pam_network_manager.c)
set_property(TARGET pam_network_manager_test PROPERTY COMPILE_DEFINITIONS "_DEFAULT_SOURCE;_BSD_SOURCE;TEST")
set_property(TARGET pam_network_manager_test PROPERTY COMPILE_FLAGS "-std=c99 -Wall")
add_library(pam_network_manager MODULE pam_network_manager.c)
set_property(TARGET pam_network_manager PROPERTY COMPILE_DEFINITIONS "_DEFAULT_SOURCE;_BSD_SOURCE")
set_property(TARGET pam_network_manager PROPERTY COMPILE_FLAGS "-std=c99 -Wall")
set_property(TARGET pam_network_manager PROPERTY PREFIX "")
install(TARGETS pam_network_manager pam_network_manager_helper
RUNTIME DESTINATION "${PAM_NETWORK_MANAGER_HELPER_DIR}"
LIBRARY DESTINATION "${PAM_MODULE_DIR}"
)

15
FindPAM.cmake
View file

@ -1,15 +0,0 @@
FIND_PATH(PAM_INCLUDE_DIR security/pam_modules.h)
IF (PAM_INCLUDE_DIR)
SET(PAM_FOUND TRUE)
ENDIF (PAM_INCLUDE_DIR)
IF (PAM_FOUND)
IF (NOT PAM_FIND_QUIETLY)
MESSAGE(STATUS "Found PAM (include path: ${PAM_INCLUDE_DIR})")
ENDIF (NOT PAM_FIND_QUIETLY)
ELSE (PAM_FOUND)
IF (PAM_FIND_REQUIRED)
MESSAGE(FATAL_ERROR "Could not find PAM")
ENDIF (PAM_FIND_REQUIRED)
ENDIF (PAM_FOUND)

20
Findlibnm_glib.cmake
View file

@ -1,20 +0,0 @@
# Defines the following variables:
# LIBNM_GLIB_FOUND
# LIBNM_GLIB_INCLUDE_DIRS
# LIBNM_GLIB_CFLAGS_OTHER
# LIBNM_GLIB_LIBRARIES
# LIBNM_GLIB_LIBRARY_DIRS
# LIBNM_GLIB_LDFLAGS_OTHER
find_package(PkgConfig REQUIRED QUIET)
pkg_check_modules(_LIBNM_GLIB libnm-glib)
set(LIBNM_GLIB_INCLUDE_DIRS "${_LIBNM_GLIB_INCLUDE_DIRS}" CACHE STRING "Include directories for libnm-glib")
set(LIBNM_GLIB_CFLAGS_OTHER "${_LIBNM_GLIB_CFLAGS_OTHER}" CACHE STRING "Additional compiler flags for libnm-glib")
set(LIBNM_GLIB_LIBRARY_DIRS "${_LIBNM_GLIB_LIBRARY_DIRS}" CACHE STRING "Library directories for libnm-glib")
set(LIBNM_GLIB_LIBRARIES "${_LIBNM_GLIB_LIBRARIES}" CACHE STRING "Libraries for libnm-glib")
set(LIBNM_GLIB_LDFLAGS_OTHER "${_LIBNM_GLIB_LDFLAGS_OTHER}" CACHE STRING "Additional linker flags for libnm-glib")
find_package_handle_standard_args(LIBNM_GLIB REQUIRED_VARS LIBNM_GLIB_LIBRARIES LIBNM_GLIB_INCLUDE_DIRS)
mark_as_advanced(LIBNM_GLIB_INCLUDE_DIRS LIBNM_GLIB_CFLAGS_OTHER LIBNM_GLIB_LIBRARIES LIBNM_GLIB_LIBRARY_DIRS LIBNM_GLIB_LDFLAGS_OTHER)

23
LICENSE
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@ -1,23 +0,0 @@
Copyright (c) 2015, Kristof Stahl <stahl@itsc.uni-luebeck.de>
Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

7
Makefile Normal file
View file

@ -0,0 +1,7 @@
all : pam_wlan.so pam_wlan_test
pam_wlan.so : pam_wlan.c
$(CC) -fPIC -shared -o pam_wlan.so pam_wlan.c $(shell pkg-config --cflags --libs libnm-glib) -Wall
pam_wlan_test : pam_wlan.c
$(CC) -g -DTEST -o pam_wlan_test pam_wlan.c $(shell pkg-config --cflags --libs libnm-glib) -Wall

41
config.h.in
View file

@ -1,41 +0,0 @@
/*
Copyright (c) 2015, Kristof Stahl <stahl@itsc.uni-luebeck.de>
Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#define PAM_NETWORK_MANAGER_HELPER "@PAM_NETWORK_MANAGER_HELPER_DIR@/pam_network_manager_helper"
#define CONNECTION_TIMEOUT @CONNECTION_TIMEOUT@
#define CONNECTION_ID "@CONNECTION_ID@"
#define CONNECTION_UUID "@CONNECTION_UUID@"
#define CONNECTION_SSID "@CONNECTION_SSID@"
#define CONNECTION_AUTH_ALG "@CONNECTION_AUTH_ALG@"
#define CONNECTION_KEY_MGMT "@CONNECTION_KEY_MGMT@"
#define CONNECTION_EAP "@CONNECTION_EAP@"
#define CONNECTION_PHASE2_AUTHEAP "@CONNECTION_PHASE2_AUTHEAP@"

101
pam_network_manager.c
View file

@ -1,101 +0,0 @@
/*
Copyright (c) 2015, Kristof Stahl <stahl@itsc.uni-luebeck.de>
Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
See:
http://www.linux-pam.org/Linux-PAM-html/mwg-expected-of-module-auth.html
http://www.linux-pam.org/Linux-PAM-html/mwg-expected-by-module-item.html
http://www.linux-pam.org/Linux-PAM-html/mwg-see-programming-libs.html
some (bad) example.. https://github.com/beatgammit/simple-pam/blob/master/src/mypam.c
*/
#define PAM_SM_AUTH
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <security/pam_modules.h>
#include <config.h>
#define UNUSED __attribute__((unused))
static int authenticate(const char *user, const char *pass) {
FILE *stream = popen(PAM_NETWORK_MANAGER_HELPER, "we");
fputs(user, stream);
fputc(0, stream);
fputs(pass, stream);
int status = pclose(stream);
if (WIFEXITED(status))
return WEXITSTATUS(status);
else
return PAM_SYSTEM_ERR;
}
#ifdef TEST
int main(int argc, char *argv[]) {
if (argc != 2) {
fprintf(stderr, "Usage: pam_network_manager_test <user>\n");
return 1;
}
char *pass = getpass("Password: ");
fprintf(stderr, "Return: %i\n", authenticate(argv[1], pass));
return 0;
}
#else
PAM_EXTERN int pam_sm_authenticate(pam_handle_t *pamh, UNUSED int flags, UNUSED int argc, UNUSED const char **argv) {
const void *pass;
const void *user;
int result;
result = pam_get_item(pamh, PAM_USER, &user);
if (result != PAM_SUCCESS)
return PAM_INCOMPLETE;
result = pam_get_item(pamh, PAM_AUTHTOK, &pass);
if (result != PAM_SUCCESS)
return PAM_INCOMPLETE;
return authenticate(user, pass);
}
#endif

205
pam_network_manager_helper.c → pam_wlan.c
View file

@ -26,14 +26,31 @@
/*
See:
Helpful pages:
http://www.linux-pam.org/Linux-PAM-html/mwg-expected-of-module-auth.html
http://www.linux-pam.org/Linux-PAM-html/mwg-expected-by-module-item.html
http://www.linux-pam.org/Linux-PAM-html/mwg-see-programming-libs.html
some (bad) example.. https://github.com/beatgammit/simple-pam/blob/master/src/mypam.c
https://developer.gnome.org/libnm-glib/0.9/
https://developer.gnome.org/libnm-util/0.9/
*/
#define PAM_SM_AUTH
#ifdef TEST
#include <stdio.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <security/pam_modules.h>
@ -46,10 +63,16 @@
#include <nm-setting-ip4-config.h>
#include <nm-setting-ip6-config.h>
#include <config.h>
#define TIMEOUT 10
#define CONNECTION_ID "UzL-Wlan"
#define CONNECTION_UUID "af7b7f0b-3e09-442e-8841-f7d7482fa7b0"
#define UNUSED __attribute__((unused))
#define CONNECTION_SSID "UzL-Wlan"
#define CONNECTION_AUTH_ALG "open"
#define CONNECTION_KEY_MGMT "wpa-eap"
#define CONNECTION_EAP "ttls"
#define CONNECTION_PHASE2_AUTHEAP "mschapv2"
static GByteArray * string_to_byte_array(const char *str) {
@ -112,7 +135,7 @@ static int setup_connection(NMConnection *con, const char *user, const char *pas
/* NMSettingIP6Config */
setting = nm_setting_ip6_config_new();
g_object_set(G_OBJECT(setting),
NM_SETTING_IP6_CONFIG_METHOD, "link-local",
NM_SETTING_IP6_CONFIG_METHOD, "auto",
NULL);
nm_connection_add_setting(con, setting);
@ -123,7 +146,6 @@ typedef struct {
int ret;
GMainLoop *loop;
NMClient *client;
NMRemoteConnection *con;
} cb_arg;
@ -141,14 +163,7 @@ static NMDevice * find_device(NMClient *client) {
return NULL;
}
static gboolean timeout_cb(gpointer user_data) {
cb_arg *arg = user_data;
g_main_loop_quit(arg->loop);
return FALSE;
}
static void state_cb(NMDevice *device, UNUSED GParamSpec *pspec, gpointer user_data) {
static void state_cb(NMDevice *device, GParamSpec *pspec, gpointer user_data) {
cb_arg *arg = user_data;
NMActiveConnection *active_connection = nm_device_get_active_connection(device);
@ -165,19 +180,20 @@ static void state_cb(NMDevice *device, UNUSED GParamSpec *pspec, gpointer user_d
}
}
static void activate_cb(UNUSED NMClient *client, UNUSED NMActiveConnection *active_connection, GError *error, gpointer user_data) {
static void activate_cb(NMClient *client, NMActiveConnection *active_connection, GError *error, gpointer user_data) {
cb_arg *arg = user_data;
if (error)
goto error;
return;
error:
g_main_loop_quit(arg->loop);
}
static void add_cb(UNUSED NMRemoteSettings *settings, NMRemoteConnection *con, GError *error, gpointer user_data) {
static void add_cb(NMRemoteSettings *settings, NMRemoteConnection *con, GError *error, gpointer user_data) {
cb_arg *arg = user_data;
if (error)
@ -187,86 +203,21 @@ static void add_cb(UNUSED NMRemoteSettings *settings, NMRemoteConnection *con, G
if (!device)
goto error;
arg->con = con;
g_signal_connect(device, "notify::state", G_CALLBACK(state_cb), arg);
nm_client_activate_connection(arg->client, NM_CONNECTION(con), device, NULL, activate_cb, arg);
g_timeout_add_seconds(CONNECTION_TIMEOUT, timeout_cb, arg);
return;
error:
g_main_loop_quit(arg->loop);
}
static void delete_cb(UNUSED NMRemoteConnection *connection, UNUSED GError *error, gpointer user_data) {
cb_arg *arg = user_data;
g_main_loop_quit(arg->loop);
}
static void read_cb(UNUSED NMRemoteSettings *settings, gpointer user_data) {
cb_arg *arg = user_data;
g_main_loop_quit(arg->loop);
}
static gboolean match_connection_user(NMConnection *connection, const char *user) {
NMSetting8021x *setting = nm_connection_get_setting_802_1x(connection);
if (!setting)
return FALSE;
const char *identity = nm_setting_802_1x_get_identity(setting);
if (!identity)
return FALSE;
return (strcmp(identity, user) == 0);
}
static gboolean is_connection_active(NMConnection *connection, cb_arg *arg) {
NMDevice *device = find_device(arg->client);
if (!device)
return FALSE;
NMActiveConnection *active_connection = nm_device_get_active_connection(device);
if (!active_connection)
return FALSE;
if (strcmp(nm_connection_get_path(connection), nm_active_connection_get_connection(active_connection)) != 0)
return FALSE;
NMActiveConnectionState state = nm_active_connection_get_state(active_connection);
return (state == NM_ACTIVE_CONNECTION_STATE_ACTIVATED);
}
static gboolean handle_old_connection(NMRemoteSettings *settings, const char *user, cb_arg *arg) {
NMRemoteConnection *con = NULL;
g_signal_connect(settings, NM_REMOTE_SETTINGS_CONNECTIONS_READ,
G_CALLBACK(read_cb), arg);
g_main_loop_run(arg->loop);
con = nm_remote_settings_get_connection_by_uuid(settings, CONNECTION_UUID);
if (!con)
goto end;
if (match_connection_user(NM_CONNECTION(con), user) && is_connection_active(NM_CONNECTION(con), arg))
return TRUE;
nm_remote_connection_delete(con, delete_cb, arg);
g_main_loop_run(arg->loop);
end:
return FALSE;
}
static int authenticate(const char *user, const char *pass) {
static int do_authenticate(const char *user, const char *pass) {
DBusGConnection *dbus = NULL;
NMRemoteSettings *settings = NULL;
NMConnection *con = NULL;
cb_arg arg = {};
arg.ret = PAM_SERVICE_ERR;
arg.ret = PAM_SYSTEM_ERR;
arg.loop = g_main_loop_new(NULL, FALSE);
arg.client = nm_client_new();
@ -281,13 +232,7 @@ static int authenticate(const char *user, const char *pass) {
if (!settings)
goto end;
if (handle_old_connection(settings, user, &arg)) {
arg.ret = PAM_IGNORE;
goto end;
}
con = nm_connection_new();
setup_connection(con, user, pass);
if (!nm_remote_settings_add_connection_unsaved(settings, con, add_cb, &arg))
@ -297,47 +242,81 @@ static int authenticate(const char *user, const char *pass) {
g_main_loop_run(arg.loop);
if (arg.ret == PAM_SUCCESS)
goto end;
/* Error */
if (arg.con) {
nm_remote_connection_delete(arg.con, delete_cb, &arg);
g_main_loop_run(arg.loop);
}
end:
if (con)
g_object_unref(con);
if (settings)
g_object_unref(settings);
if (dbus)
dbus_g_connection_unref(dbus);
if (arg.client)
g_object_unref(arg.client);
g_main_loop_unref(arg.loop);
return arg.ret;
}
int main() {
char buf[1024];
size_t len = 0;
static int authenticate(const char *user, const char *pass) {
int status;
int fds[2];
if (pipe(fds))
return PAM_SYSTEM_ERR;
while (len < sizeof(buf)-1) {
size_t r = fread(buf+len, 1, sizeof(buf)-len-1, stdin);
if (!r)
break;
pid_t pid = fork();
if (pid < 0)
return PAM_SYSTEM_ERR;
len += r;
if (pid == 0) {
close(fds[0]);
status = do_authenticate(user, pass);
write(fds[1], &status, sizeof(status));
close(fds[1]);
_exit(0);
}
buf[len] = 0;
close(fds[1]);
const char *user = buf;
const char *pass = user + strlen(user) + 1;
if (pass > buf+len)
if (waitpid(pid, NULL, 0) < 0)
goto error;
if (read(fds[0], &status, sizeof(status)) != sizeof(status))
goto error;
close(fds[0]);
return status;
error:
close(fds[0]);
return PAM_SYSTEM_ERR;
}
#ifdef TEST
int main(int argc, char *argv[]) {
if (argc != 2) {
fprintf(stderr, "Usage: pam_wlan_test <user>\n");
return 1;
}
char *pass = getpass("Password: ");
fprintf(stderr, "Return: %i\n", authenticate(argv[1], pass));
return 0;
}
#else
PAM_EXTERN int pam_sm_authenticate(pam_handle_t *pamh, __attribute__((unused)) int flags, __attribute__((unused)) int argc, __attribute__((unused)) const char **argv) {
const void *pass;
const void *user;
int result;
result = pam_get_item(pamh, PAM_USER, &user);
if (result != PAM_SUCCESS)
return PAM_INCOMPLETE;
result = pam_get_item(pamh, PAM_AUTHTOK, &pass);
if (result != PAM_SUCCESS)
return PAM_INCOMPLETE;
return authenticate(user, pass);
}
#endif