From 0393ba6656ce6cf679a2c4663275b3ed0f1a34b9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Parm=C3=A9nides=20GV?= Date: Thu, 31 Jul 2014 12:09:49 +0200 Subject: Updated ics-openvpn to rev 859 + no 2nd notification. --- .../main/openvpn/src/plugins/Makefile.am | 15 + .../main/openvpn/src/plugins/Makefile.in | 546 ++++++++++++++ .../main/openvpn/src/plugins/auth-pam/Makefile.am | 28 + .../main/openvpn/src/plugins/auth-pam/Makefile.in | 570 +++++++++++++++ .../openvpn/src/plugins/auth-pam/README.auth-pam | 74 ++ .../main/openvpn/src/plugins/auth-pam/auth-pam.c | 806 +++++++++++++++++++++ .../openvpn/src/plugins/auth-pam/auth-pam.exports | 4 + .../main/openvpn/src/plugins/auth-pam/pamdl.c | 184 +++++ .../main/openvpn/src/plugins/auth-pam/pamdl.h | 5 + .../main/openvpn/src/plugins/down-root/Makefile.am | 24 + .../main/openvpn/src/plugins/down-root/Makefile.in | 563 ++++++++++++++ .../openvpn/src/plugins/down-root/README.down-root | 29 + .../main/openvpn/src/plugins/down-root/down-root.c | 557 ++++++++++++++ .../src/plugins/down-root/down-root.exports | 4 + 14 files changed, 3409 insertions(+) create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/Makefile.am create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/Makefile.in create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/Makefile.am create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/Makefile.in create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/README.auth-pam create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/auth-pam.c create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/auth-pam.exports create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/pamdl.c create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/pamdl.h create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/down-root/Makefile.am create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/down-root/Makefile.in create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/down-root/README.down-root create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/down-root/down-root.c create mode 100644 ics-openvpn-stripped/main/openvpn/src/plugins/down-root/down-root.exports (limited to 'ics-openvpn-stripped/main/openvpn/src/plugins') diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/Makefile.am b/ics-openvpn-stripped/main/openvpn/src/plugins/Makefile.am new file mode 100644 index 00000000..17b72b94 --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/Makefile.am @@ -0,0 +1,15 @@ +# +# OpenVPN -- An application to securely tunnel IP networks +# over a single UDP port, with support for SSL/TLS-based +# session authentication and key exchange, +# packet encryption, packet authentication, and +# packet compression. +# +# Copyright (C) 2002-2010 OpenVPN Technologies, Inc. +# Copyright (C) 2006-2012 Alon Bar-Lev +# + +MAINTAINERCLEANFILES = \ + $(srcdir)/Makefile.in + +SUBDIRS = auth-pam down-root diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/Makefile.in b/ics-openvpn-stripped/main/openvpn/src/plugins/Makefile.in new file mode 100644 index 00000000..6a366c4b --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/Makefile.in @@ -0,0 +1,546 @@ +# Makefile.in generated by automake 1.10 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006 Free Software Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +# +# OpenVPN -- An application to securely tunnel IP networks +# over a single UDP port, with support for SSL/TLS-based +# session authentication and key exchange, +# packet encryption, packet authentication, and +# packet compression. +# +# Copyright (C) 2002-2010 OpenVPN Technologies, Inc. +# Copyright (C) 2006-2012 Alon Bar-Lev +# +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +subdir = src/plugins +DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in +ACLOCAL_M4 = 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exceeded. +.NOEXPORT: diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/Makefile.am b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/Makefile.am new file mode 100644 index 00000000..2aef311a --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/Makefile.am @@ -0,0 +1,28 @@ +# +# OpenVPN (TM) PAM Auth Plugin -- OpenVPN Plugin +# +# Copyright (C) 2012 Alon Bar-Lev +# + +MAINTAINERCLEANFILES = \ + $(srcdir)/Makefile.in + +AM_CFLAGS = \ + -I$(top_srcdir)/include \ + $(PLUGIN_AUTH_PAM_CFLAGS) \ + $(OPTIONAL_CRYPTO_CFLAGS) + +if ENABLE_PLUGIN_AUTH_PAM +plugin_LTLIBRARIES = openvpn-plugin-auth-pam.la +dist_doc_DATA = README.auth-pam +endif + +openvpn_plugin_auth_pam_la_SOURCES = \ + auth-pam.c \ + pamdl.c pamdl.h \ + auth-pam.exports +openvpn_plugin_auth_pam_la_LIBADD = \ + $(PLUGIN_AUTH_PAM_LIBS) +openvpn_plugin_auth_pam_la_LDFLAGS = $(AM_LDFLAGS) \ + -export-symbols "$(srcdir)/auth-pam.exports" \ + -module -shared -avoid-version -no-undefined 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$(MAINTAINERCLEANFILES) +clean: clean-am + +clean-am: clean-generic clean-libtool clean-pluginLTLIBRARIES \ + mostlyclean-am + +distclean: distclean-am + -rm -rf ./$(DEPDIR) + -rm -f Makefile +distclean-am: clean-am distclean-compile distclean-generic \ + distclean-tags + +dvi: dvi-am + +dvi-am: + +html: html-am + +info: info-am + +info-am: + +install-data-am: install-dist_docDATA install-pluginLTLIBRARIES + +install-dvi: install-dvi-am + +install-exec-am: + +install-html: install-html-am + +install-info: install-info-am + +install-man: + +install-pdf: install-pdf-am + +install-ps: install-ps-am + +installcheck-am: + +maintainer-clean: maintainer-clean-am + -rm -rf ./$(DEPDIR) + -rm -f Makefile +maintainer-clean-am: distclean-am maintainer-clean-generic + +mostlyclean: mostlyclean-am + +mostlyclean-am: mostlyclean-compile mostlyclean-generic \ + mostlyclean-libtool + +pdf: pdf-am + +pdf-am: + +ps: ps-am + +ps-am: + +uninstall-am: uninstall-dist_docDATA uninstall-pluginLTLIBRARIES + +.MAKE: install-am install-strip + +.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \ + clean-libtool clean-pluginLTLIBRARIES ctags distclean \ + distclean-compile distclean-generic distclean-libtool \ + distclean-tags distdir dvi dvi-am html html-am info info-am \ + install install-am install-data install-data-am \ + install-dist_docDATA install-dvi install-dvi-am install-exec \ + install-exec-am install-html install-html-am install-info \ + install-info-am install-man install-pdf install-pdf-am \ + install-pluginLTLIBRARIES install-ps install-ps-am \ + install-strip installcheck installcheck-am installdirs \ + maintainer-clean maintainer-clean-generic mostlyclean \ + mostlyclean-compile mostlyclean-generic mostlyclean-libtool \ + pdf pdf-am ps ps-am tags uninstall uninstall-am \ + uninstall-dist_docDATA uninstall-pluginLTLIBRARIES + + $(PLUGIN_AUTH_PAM_CFLAGS) +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/README.auth-pam b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/README.auth-pam new file mode 100644 index 00000000..e1236902 --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/README.auth-pam @@ -0,0 +1,74 @@ +openvpn-auth-pam + +SYNOPSIS + +The openvpn-auth-pam module implements username/password +authentication via PAM, and essentially allows any authentication +method supported by PAM (such as LDAP, RADIUS, or Linux Shadow +passwords) to be used with OpenVPN. While PAM supports +username/password authentication, this can be combined with X509 +certificates to provide two indepedent levels of authentication. + +This module uses a split privilege execution model which will +function even if you drop openvpn daemon privileges using the user, +group, or chroot directives. + +BUILD + +To build openvpn-auth-pam, you will need to have the pam-devel +package installed. + +Build with the "make" command. The module will be named +openvpn-auth-pam.so + +USAGE + +To use this plugin module, add to your OpenVPN config file: + + plugin openvpn-auth-pam.so service-type + +The required service-type parameter corresponds to +the PAM service definition file usually found +in /etc/pam.d. + +This plugin also supports the usage of a list of name/value +pairs to answer PAM module queries. + +For example: + + plugin openvpn-auth-pam.so "login login USERNAME password PASSWORD" + +tells auth-pam to (a) use the "login" PAM module, (b) answer a +"login" query with the username given by the OpenVPN client, and +(c) answer a "password" query with the password given by the +OpenVPN client. This provides flexibility in dealing with the different +types of query strings which different PAM modules might generate. +For example, suppose you were using a PAM module called +"test" which queried for "name" rather than "login": + + plugin openvpn-auth-pam.so "test name USERNAME password PASSWORD" + +While "USERNAME" "COMMONNAME" and "PASSWORD" are special strings which substitute +to client-supplied values, it is also possible to name literal values +to use as PAM module query responses. For example, suppose that the +login module queried for a third parameter, "domain" which +is to be answered with the constant value "mydomain.com": + + plugin openvpn-auth-pam.so "login login USERNAME password PASSWORD domain mydomain.com" + +The following OpenVPN directives can also influence +the operation of this plugin: + + client-cert-not-required + username-as-common-name + +Run OpenVPN with --verb 7 or higher to get debugging output from +this plugin, including the list of queries presented by the +underlying PAM module. This is a useful debugging tool to figure +out which queries a given PAM module is making, so that you can +craft the appropriate plugin directive to answer it. + +CAVEATS + +This module will only work on *nix systems which support PAM, +not Windows. diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/auth-pam.c b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/auth-pam.c new file mode 100644 index 00000000..bd717927 --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/auth-pam.c @@ -0,0 +1,806 @@ +/* + * OpenVPN -- An application to securely tunnel IP networks + * over a single TCP/UDP port, with support for SSL/TLS-based + * session authentication and key exchange, + * packet encryption, packet authentication, and + * packet compression. + * + * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program (see the file COPYING included with this + * distribution); if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * OpenVPN plugin module to do PAM authentication using a split + * privilege model. + */ +#ifdef HAVE_CONFIG_H +#include +#endif + +#include + +#ifdef USE_PAM_DLOPEN +#include "pamdl.h" +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define DEBUG(verb) ((verb) >= 4) + +/* Command codes for foreground -> background communication */ +#define COMMAND_VERIFY 0 +#define COMMAND_EXIT 1 + +/* Response codes for background -> foreground communication */ +#define RESPONSE_INIT_SUCCEEDED 10 +#define RESPONSE_INIT_FAILED 11 +#define RESPONSE_VERIFY_SUCCEEDED 12 +#define RESPONSE_VERIFY_FAILED 13 + +/* + * Plugin state, used by foreground + */ +struct auth_pam_context +{ + /* Foreground's socket to background process */ + int foreground_fd; + + /* Process ID of background process */ + pid_t background_pid; + + /* Verbosity level of OpenVPN */ + int verb; +}; + +/* + * Name/Value pairs for conversation function. + * Special Values: + * + * "USERNAME" -- substitute client-supplied username + * "PASSWORD" -- substitute client-specified password + * "COMMONNAME" -- substitute client certificate common name + */ + +#define N_NAME_VALUE 16 + +struct name_value { + const char *name; + const char *value; +}; + +struct name_value_list { + int len; + struct name_value data[N_NAME_VALUE]; +}; + +/* + * Used to pass the username/password + * to the PAM conversation function. + */ +struct user_pass { + int verb; + + char username[128]; + char password[128]; + char common_name[128]; + + const struct name_value_list *name_value_list; +}; + +/* Background process function */ +static void pam_server (int fd, const char *service, int verb, const struct name_value_list *name_value_list); + +/* Read 'tosearch', replace all occurences of 'searchfor' with 'replacewith' and return + * a pointer to the NEW string. Does not modify the input strings. Will not enter an + * infinite loop with clever 'searchfor' and 'replacewith' strings. + * Daniel Johnson - Progman2000@usa.net / djohnson@progman.us + */ +static char * +searchandreplace(const char *tosearch, const char *searchfor, const char *replacewith) +{ + const char *searching=tosearch; + char *scratch; + char temp[strlen(tosearch)*10]; + temp[0]=0; + + if (!tosearch || !searchfor || !replacewith) return 0; + if (!strlen(tosearch) || !strlen(searchfor) || !strlen(replacewith)) return 0; + + scratch = strstr(searching,searchfor); + if (!scratch) return strdup(tosearch); + + while (scratch) { + strncat(temp,searching,scratch-searching); + strcat(temp,replacewith); + + searching=scratch+strlen(searchfor); + scratch = strstr(searching,searchfor); + } + return strdup(temp); +} + +/* + * Given an environmental variable name, search + * the envp array for its value, returning it + * if found or NULL otherwise. + */ +static const char * +get_env (const char *name, const char *envp[]) +{ + if (envp) + { + int i; + const int namelen = strlen (name); + for (i = 0; envp[i]; ++i) + { + if (!strncmp (envp[i], name, namelen)) + { + const char *cp = envp[i] + namelen; + if (*cp == '=') + return cp + 1; + } + } + } + return NULL; +} + +/* + * Return the length of a string array + */ +static int +string_array_len (const char *array[]) +{ + int i = 0; + if (array) + { + while (array[i]) + ++i; + } + return i; +} + +/* + * Socket read/write functions. + */ + +static int +recv_control (int fd) +{ + unsigned char c; + const ssize_t size = read (fd, &c, sizeof (c)); + if (size == sizeof (c)) + return c; + else + { + /*fprintf (stderr, "AUTH-PAM: DEBUG recv_control.read=%d\n", (int)size);*/ + return -1; + } +} + +static int +send_control (int fd, int code) +{ + unsigned char c = (unsigned char) code; + const ssize_t size = write (fd, &c, sizeof (c)); + if (size == sizeof (c)) + return (int) size; + else + return -1; +} + +static int +recv_string (int fd, char *buffer, int len) +{ + if (len > 0) + { + ssize_t size; + memset (buffer, 0, len); + size = read (fd, buffer, len); + buffer[len-1] = 0; + if (size >= 1) + return (int)size; + } + return -1; +} + +static int +send_string (int fd, const char *string) +{ + const int len = strlen (string) + 1; + const ssize_t size = write (fd, string, len); + if (size == len) + return (int) size; + else + return -1; +} + +#ifdef DO_DAEMONIZE + +/* + * Daemonize if "daemon" env var is true. + * Preserve stderr across daemonization if + * "daemon_log_redirect" env var is true. + */ +static void +daemonize (const char *envp[]) +{ + const char *daemon_string = get_env ("daemon", envp); + if (daemon_string && daemon_string[0] == '1') + { + const char *log_redirect = get_env ("daemon_log_redirect", envp); + int fd = -1; + if (log_redirect && log_redirect[0] == '1') + fd = dup (2); + if (daemon (0, 0) < 0) + { + fprintf (stderr, "AUTH-PAM: daemonization failed\n"); + } + else if (fd >= 3) + { + dup2 (fd, 2); + close (fd); + } + } +} + +#endif + +/* + * Close most of parent's fds. + * Keep stdin/stdout/stderr, plus one + * other fd which is presumed to be + * our pipe back to parent. + * Admittedly, a bit of a kludge, + * but posix doesn't give us a kind + * of FD_CLOEXEC which will stop + * fds from crossing a fork(). + */ +static void +close_fds_except (int keep) +{ + int i; + closelog (); + for (i = 3; i <= 100; ++i) + { + if (i != keep) + close (i); + } +} + +/* + * Usually we ignore signals, because our parent will + * deal with them. + */ +static void +set_signals (void) +{ + signal (SIGTERM, SIG_DFL); + + signal (SIGINT, SIG_IGN); + signal (SIGHUP, SIG_IGN); + signal (SIGUSR1, SIG_IGN); + signal (SIGUSR2, SIG_IGN); + signal (SIGPIPE, SIG_IGN); +} + +/* + * Return 1 if query matches match. + */ +static int +name_value_match (const char *query, const char *match) +{ + while (!isalnum (*query)) + { + if (*query == '\0') + return 0; + ++query; + } + return strncasecmp (match, query, strlen (match)) == 0; +} + +OPENVPN_EXPORT openvpn_plugin_handle_t +openvpn_plugin_open_v1 (unsigned int *type_mask, const char *argv[], const char *envp[]) +{ + pid_t pid; + int fd[2]; + + struct auth_pam_context *context; + struct name_value_list name_value_list; + + const int base_parms = 2; + + /* + * Allocate our context + */ + context = (struct auth_pam_context *) calloc (1, sizeof (struct auth_pam_context)); + if (!context) + goto error; + context->foreground_fd = -1; + + /* + * Intercept the --auth-user-pass-verify callback. + */ + *type_mask = OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY); + + /* + * Make sure we have two string arguments: the first is the .so name, + * the second is the PAM service type. + */ + if (string_array_len (argv) < base_parms) + { + fprintf (stderr, "AUTH-PAM: need PAM service parameter\n"); + goto error; + } + + /* + * See if we have optional name/value pairs to match against + * PAM module queried fields in the conversation function. + */ + name_value_list.len = 0; + if (string_array_len (argv) > base_parms) + { + const int nv_len = string_array_len (argv) - base_parms; + int i; + + if ((nv_len & 1) == 1 || (nv_len / 2) > N_NAME_VALUE) + { + fprintf (stderr, "AUTH-PAM: bad name/value list length\n"); + goto error; + } + + name_value_list.len = nv_len / 2; + for (i = 0; i < name_value_list.len; ++i) + { + const int base = base_parms + i * 2; + name_value_list.data[i].name = argv[base]; + name_value_list.data[i].value = argv[base+1]; + } + } + + /* + * Get verbosity level from environment + */ + { + const char *verb_string = get_env ("verb", envp); + if (verb_string) + context->verb = atoi (verb_string); + } + + /* + * Make a socket for foreground and background processes + * to communicate. + */ + if (socketpair (PF_UNIX, SOCK_DGRAM, 0, fd) == -1) + { + fprintf (stderr, "AUTH-PAM: socketpair call failed\n"); + goto error; + } + + /* + * Fork off the privileged process. It will remain privileged + * even after the foreground process drops its privileges. + */ + pid = fork (); + + if (pid) + { + int status; + + /* + * Foreground Process + */ + + context->background_pid = pid; + + /* close our copy of child's socket */ + close (fd[1]); + + /* don't let future subprocesses inherit child socket */ + if (fcntl (fd[0], F_SETFD, FD_CLOEXEC) < 0) + fprintf (stderr, "AUTH-PAM: Set FD_CLOEXEC flag on socket file descriptor failed\n"); + + /* wait for background child process to initialize */ + status = recv_control (fd[0]); + if (status == RESPONSE_INIT_SUCCEEDED) + { + context->foreground_fd = fd[0]; + return (openvpn_plugin_handle_t) context; + } + } + else + { + /* + * Background Process + */ + + /* close all parent fds except our socket back to parent */ + close_fds_except (fd[1]); + + /* Ignore most signals (the parent will receive them) */ + set_signals (); + +#ifdef DO_DAEMONIZE + /* Daemonize if --daemon option is set. */ + daemonize (envp); +#endif + + /* execute the event loop */ + pam_server (fd[1], argv[1], context->verb, &name_value_list); + + close (fd[1]); + + exit (0); + return 0; /* NOTREACHED */ + } + + error: + if (context) + free (context); + return NULL; +} + +OPENVPN_EXPORT int +openvpn_plugin_func_v1 (openvpn_plugin_handle_t handle, const int type, const char *argv[], const char *envp[]) +{ + struct auth_pam_context *context = (struct auth_pam_context *) handle; + + if (type == OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY && context->foreground_fd >= 0) + { + /* get username/password from envp string array */ + const char *username = get_env ("username", envp); + const char *password = get_env ("password", envp); + const char *common_name = get_env ("common_name", envp) ? get_env ("common_name", envp) : ""; + + if (username && strlen (username) > 0 && password) + { + if (send_control (context->foreground_fd, COMMAND_VERIFY) == -1 + || send_string (context->foreground_fd, username) == -1 + || send_string (context->foreground_fd, password) == -1 + || send_string (context->foreground_fd, common_name) == -1) + { + fprintf (stderr, "AUTH-PAM: Error sending auth info to background process\n"); + } + else + { + const int status = recv_control (context->foreground_fd); + if (status == RESPONSE_VERIFY_SUCCEEDED) + return OPENVPN_PLUGIN_FUNC_SUCCESS; + if (status == -1) + fprintf (stderr, "AUTH-PAM: Error receiving auth confirmation from background process\n"); + } + } + } + return OPENVPN_PLUGIN_FUNC_ERROR; +} + +OPENVPN_EXPORT void +openvpn_plugin_close_v1 (openvpn_plugin_handle_t handle) +{ + struct auth_pam_context *context = (struct auth_pam_context *) handle; + + if (DEBUG (context->verb)) + fprintf (stderr, "AUTH-PAM: close\n"); + + if (context->foreground_fd >= 0) + { + /* tell background process to exit */ + if (send_control (context->foreground_fd, COMMAND_EXIT) == -1) + fprintf (stderr, "AUTH-PAM: Error signaling background process to exit\n"); + + /* wait for background process to exit */ + if (context->background_pid > 0) + waitpid (context->background_pid, NULL, 0); + + close (context->foreground_fd); + context->foreground_fd = -1; + } + + free (context); +} + +OPENVPN_EXPORT void +openvpn_plugin_abort_v1 (openvpn_plugin_handle_t handle) +{ + struct auth_pam_context *context = (struct auth_pam_context *) handle; + + /* tell background process to exit */ + if (context && context->foreground_fd >= 0) + { + send_control (context->foreground_fd, COMMAND_EXIT); + close (context->foreground_fd); + context->foreground_fd = -1; + } +} + +/* + * PAM conversation function + */ +static int +my_conv (int n, const struct pam_message **msg_array, + struct pam_response **response_array, void *appdata_ptr) +{ + const struct user_pass *up = ( const struct user_pass *) appdata_ptr; + struct pam_response *aresp; + int i; + int ret = PAM_SUCCESS; + + *response_array = NULL; + + if (n <= 0 || n > PAM_MAX_NUM_MSG) + return (PAM_CONV_ERR); + if ((aresp = calloc (n, sizeof *aresp)) == NULL) + return (PAM_BUF_ERR); + + /* loop through each PAM-module query */ + for (i = 0; i < n; ++i) + { + const struct pam_message *msg = msg_array[i]; + aresp[i].resp_retcode = 0; + aresp[i].resp = NULL; + + if (DEBUG (up->verb)) + { + fprintf (stderr, "AUTH-PAM: BACKGROUND: my_conv[%d] query='%s' style=%d\n", + i, + msg->msg ? msg->msg : "NULL", + msg->msg_style); + } + + if (up->name_value_list && up->name_value_list->len > 0) + { + /* use name/value list match method */ + const struct name_value_list *list = up->name_value_list; + int j; + + /* loop through name/value pairs */ + for (j = 0; j < list->len; ++j) + { + const char *match_name = list->data[j].name; + const char *match_value = list->data[j].value; + + if (name_value_match (msg->msg, match_name)) + { + /* found name/value match */ + aresp[i].resp = NULL; + + if (DEBUG (up->verb)) + fprintf (stderr, "AUTH-PAM: BACKGROUND: name match found, query/match-string ['%s', '%s'] = '%s'\n", + msg->msg, + match_name, + match_value); + + if (strstr(match_value, "USERNAME")) + aresp[i].resp = searchandreplace(match_value, "USERNAME", up->username); + else if (strstr(match_value, "PASSWORD")) + aresp[i].resp = searchandreplace(match_value, "PASSWORD", up->password); + else if (strstr(match_value, "COMMONNAME")) + aresp[i].resp = searchandreplace(match_value, "COMMONNAME", up->common_name); + else + aresp[i].resp = strdup (match_value); + + if (aresp[i].resp == NULL) + ret = PAM_CONV_ERR; + break; + } + } + + if (j == list->len) + ret = PAM_CONV_ERR; + } + else + { + /* use PAM_PROMPT_ECHO_x hints */ + switch (msg->msg_style) + { + case PAM_PROMPT_ECHO_OFF: + aresp[i].resp = strdup (up->password); + if (aresp[i].resp == NULL) + ret = PAM_CONV_ERR; + break; + + case PAM_PROMPT_ECHO_ON: + aresp[i].resp = strdup (up->username); + if (aresp[i].resp == NULL) + ret = PAM_CONV_ERR; + break; + + case PAM_ERROR_MSG: + case PAM_TEXT_INFO: + break; + + default: + ret = PAM_CONV_ERR; + break; + } + } + } + + if (ret == PAM_SUCCESS) + *response_array = aresp; + return ret; +} + +/* + * Return 1 if authenticated and 0 if failed. + * Called once for every username/password + * to be authenticated. + */ +static int +pam_auth (const char *service, const struct user_pass *up) +{ + struct pam_conv conv; + pam_handle_t *pamh = NULL; + int status = PAM_SUCCESS; + int ret = 0; + const int name_value_list_provided = (up->name_value_list && up->name_value_list->len > 0); + + /* Initialize PAM */ + conv.conv = my_conv; + conv.appdata_ptr = (void *)up; + status = pam_start (service, name_value_list_provided ? NULL : up->username, &conv, &pamh); + if (status == PAM_SUCCESS) + { + /* Call PAM to verify username/password */ + status = pam_authenticate(pamh, 0); + if (status == PAM_SUCCESS) + status = pam_acct_mgmt (pamh, 0); + if (status == PAM_SUCCESS) + ret = 1; + + /* Output error message if failed */ + if (!ret) + { + fprintf (stderr, "AUTH-PAM: BACKGROUND: user '%s' failed to authenticate: %s\n", + up->username, + pam_strerror (pamh, status)); + } + + /* Close PAM */ + pam_end (pamh, status); + } + + return ret; +} + +/* + * Background process -- runs with privilege. + */ +static void +pam_server (int fd, const char *service, int verb, const struct name_value_list *name_value_list) +{ + struct user_pass up; + int command; +#ifdef USE_PAM_DLOPEN + static const char pam_so[] = "libpam.so"; +#endif + + /* + * Do initialization + */ + if (DEBUG (verb)) + fprintf (stderr, "AUTH-PAM: BACKGROUND: INIT service='%s'\n", service); + +#ifdef USE_PAM_DLOPEN + /* + * Load PAM shared object + */ + if (!dlopen_pam (pam_so)) + { + fprintf (stderr, "AUTH-PAM: BACKGROUND: could not load PAM lib %s: %s\n", pam_so, dlerror()); + send_control (fd, RESPONSE_INIT_FAILED); + goto done; + } +#endif + + /* + * Tell foreground that we initialized successfully + */ + if (send_control (fd, RESPONSE_INIT_SUCCEEDED) == -1) + { + fprintf (stderr, "AUTH-PAM: BACKGROUND: write error on response socket [1]\n"); + goto done; + } + + /* + * Event loop + */ + while (1) + { + memset (&up, 0, sizeof (up)); + up.verb = verb; + up.name_value_list = name_value_list; + + /* get a command from foreground process */ + command = recv_control (fd); + + if (DEBUG (verb)) + fprintf (stderr, "AUTH-PAM: BACKGROUND: received command code: %d\n", command); + + switch (command) + { + case COMMAND_VERIFY: + if (recv_string (fd, up.username, sizeof (up.username)) == -1 + || recv_string (fd, up.password, sizeof (up.password)) == -1 + || recv_string (fd, up.common_name, sizeof (up.common_name)) == -1) + { + fprintf (stderr, "AUTH-PAM: BACKGROUND: read error on command channel: code=%d, exiting\n", + command); + goto done; + } + + if (DEBUG (verb)) + { +#if 0 + fprintf (stderr, "AUTH-PAM: BACKGROUND: USER/PASS: %s/%s\n", + up.username, up.password); +#else + fprintf (stderr, "AUTH-PAM: BACKGROUND: USER: %s\n", up.username); +#endif + } + + if (pam_auth (service, &up)) /* Succeeded */ + { + if (send_control (fd, RESPONSE_VERIFY_SUCCEEDED) == -1) + { + fprintf (stderr, "AUTH-PAM: BACKGROUND: write error on response socket [2]\n"); + goto done; + } + } + else /* Failed */ + { + if (send_control (fd, RESPONSE_VERIFY_FAILED) == -1) + { + fprintf (stderr, "AUTH-PAM: BACKGROUND: write error on response socket [3]\n"); + goto done; + } + } + break; + + case COMMAND_EXIT: + goto done; + + case -1: + fprintf (stderr, "AUTH-PAM: BACKGROUND: read error on command channel\n"); + goto done; + + default: + fprintf (stderr, "AUTH-PAM: BACKGROUND: unknown command code: code=%d, exiting\n", + command); + goto done; + } + } + done: + +#ifdef USE_PAM_DLOPEN + dlclose_pam (); +#endif + if (DEBUG (verb)) + fprintf (stderr, "AUTH-PAM: BACKGROUND: EXIT\n"); + + return; +} diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/auth-pam.exports b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/auth-pam.exports new file mode 100644 index 00000000..b07937cc --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/auth-pam.exports @@ -0,0 +1,4 @@ +openvpn_plugin_open_v1 +openvpn_plugin_func_v1 +openvpn_plugin_close_v1 +openvpn_plugin_abort_v1 diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/pamdl.c b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/pamdl.c new file mode 100644 index 00000000..26e98215 --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/pamdl.c @@ -0,0 +1,184 @@ +#ifdef HAVE_CONFIG_H +#include +#endif + +#ifdef USE_PAM_DLOPEN +/* + * If you want to dynamically load libpam using dlopen() or something, + * then dlopen( ' this shared object ' ); It takes care of exporting + * the right symbols to any modules loaded by libpam. + * + * Modified by JY for use with openvpn-pam-auth + */ + +#include +#include +#include + +#include "pamdl.h" + +static void *libpam_h = NULL; + +#define RESOLVE_PAM_FUNCTION(x, y, z, err) \ + { \ + union { const void *tpointer; y (*fn) z ; } fptr; \ + fptr.tpointer = dlsym(libpam_h, #x); real_##x = fptr.fn; \ + if (real_##x == NULL) { \ + fprintf (stderr, "PAMDL: unable to resolve '%s': %s\n", #x, dlerror()); \ + return err; \ + } \ + } + +int +dlopen_pam (const char *so) +{ + if (libpam_h == NULL) + { + libpam_h = dlopen(so, RTLD_GLOBAL|RTLD_NOW); + } + return libpam_h != NULL; +} + +void +dlclose_pam (void) +{ + if (libpam_h != NULL) + { + dlclose(libpam_h); + libpam_h = NULL; + } +} + +int pam_start(const char *service_name, const char *user, + const struct pam_conv *pam_conversation, + pam_handle_t **pamh) +{ + int (*real_pam_start)(const char *, const char *, + const struct pam_conv *, + pam_handle_t **); + RESOLVE_PAM_FUNCTION(pam_start, int, (const char *, const char *, + const struct pam_conv *, + pam_handle_t **), PAM_ABORT); + return real_pam_start(service_name, user, pam_conversation, pamh); +} + +int pam_end(pam_handle_t *pamh, int pam_status) +{ + int (*real_pam_end)(pam_handle_t *, int); + RESOLVE_PAM_FUNCTION(pam_end, int, (pam_handle_t *, int), PAM_ABORT); + return real_pam_end(pamh, pam_status); +} + +int pam_set_item(pam_handle_t *pamh, int item_type, const void *item) +{ + int (*real_pam_set_item)(pam_handle_t *, int, const void *); + RESOLVE_PAM_FUNCTION(pam_set_item, int, + (pam_handle_t *, int, const void *), PAM_ABORT); + return real_pam_set_item(pamh, item_type, item); +} + +int pam_get_item(const pam_handle_t *pamh, int item_type, const void **item) +{ + int (*real_pam_get_item)(const pam_handle_t *, int, const void **); + RESOLVE_PAM_FUNCTION(pam_get_item, int, + (const pam_handle_t *, int, const void **), + PAM_ABORT); + return real_pam_get_item(pamh, item_type, item); +} + +int pam_fail_delay(pam_handle_t *pamh, unsigned int musec_delay) +{ + int (*real_pam_fail_delay)(pam_handle_t *, unsigned int); + RESOLVE_PAM_FUNCTION(pam_fail_delay, int, (pam_handle_t *, unsigned int), + PAM_ABORT); + return real_pam_fail_delay(pamh, musec_delay); +} + +typedef const char * const_char_pointer; + +const_char_pointer pam_strerror(pam_handle_t *pamh, int errnum) +{ + const_char_pointer (*real_pam_strerror)(pam_handle_t *, int); + RESOLVE_PAM_FUNCTION(pam_strerror, const_char_pointer, + (pam_handle_t *, int), NULL); + return real_pam_strerror(pamh, errnum); +} + +int pam_putenv(pam_handle_t *pamh, const char *name_value) +{ + int (*real_pam_putenv)(pam_handle_t *, const char *); + RESOLVE_PAM_FUNCTION(pam_putenv, int, (pam_handle_t *, const char *), + PAM_ABORT); + return real_pam_putenv(pamh, name_value); +} + +const_char_pointer pam_getenv(pam_handle_t *pamh, const char *name) +{ + const_char_pointer (*real_pam_getenv)(pam_handle_t *, const char *); + RESOLVE_PAM_FUNCTION(pam_getenv, const_char_pointer, + (pam_handle_t *, const char *), NULL); + return real_pam_getenv(pamh, name); +} + +typedef char ** char_ppointer; +char_ppointer pam_getenvlist(pam_handle_t *pamh) +{ + char_ppointer (*real_pam_getenvlist)(pam_handle_t *); + RESOLVE_PAM_FUNCTION(pam_getenvlist, char_ppointer, (pam_handle_t *), + NULL); + return real_pam_getenvlist(pamh); +} + +/* Authentication management */ + +int pam_authenticate(pam_handle_t *pamh, int flags) +{ + int (*real_pam_authenticate)(pam_handle_t *, int); + RESOLVE_PAM_FUNCTION(pam_authenticate, int, (pam_handle_t *, int), + PAM_ABORT); + return real_pam_authenticate(pamh, flags); +} + +int pam_setcred(pam_handle_t *pamh, int flags) +{ + int (*real_pam_setcred)(pam_handle_t *, int); + RESOLVE_PAM_FUNCTION(pam_setcred, int, (pam_handle_t *, int), PAM_ABORT); + return real_pam_setcred(pamh, flags); +} + +/* Account Management API's */ + +int pam_acct_mgmt(pam_handle_t *pamh, int flags) +{ + int (*real_pam_acct_mgmt)(pam_handle_t *, int); + RESOLVE_PAM_FUNCTION(pam_acct_mgmt, int, (pam_handle_t *, int), PAM_ABORT); + return real_pam_acct_mgmt(pamh, flags); +} + +/* Session Management API's */ + +int pam_open_session(pam_handle_t *pamh, int flags) +{ + int (*real_pam_open_session)(pam_handle_t *, int); + RESOLVE_PAM_FUNCTION(pam_open_session, int, (pam_handle_t *, int), + PAM_ABORT); + return real_pam_open_session(pamh, flags); +} + +int pam_close_session(pam_handle_t *pamh, int flags) +{ + int (*real_pam_close_session)(pam_handle_t *, int); + RESOLVE_PAM_FUNCTION(pam_close_session, int, (pam_handle_t *, int), + PAM_ABORT); + return real_pam_close_session(pamh, flags); +} + +/* Password Management API's */ + +int pam_chauthtok(pam_handle_t *pamh, int flags) +{ + int (*real_pam_chauthtok)(pam_handle_t *, int); + RESOLVE_PAM_FUNCTION(pam_chauthtok, int, (pam_handle_t *, int), PAM_ABORT); + return real_pam_chauthtok(pamh, flags); +} +#endif diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/pamdl.h b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/pamdl.h new file mode 100644 index 00000000..12ba0684 --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/auth-pam/pamdl.h @@ -0,0 +1,5 @@ +#ifdef USE_PAM_DLOPEN +/* Dynamically load and unload the PAM library */ +int dlopen_pam (const char *so); +void dlclose_pam (void); +#endif diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/Makefile.am b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/Makefile.am new file mode 100644 index 00000000..7ca5a4e1 --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/Makefile.am @@ -0,0 +1,24 @@ +# +# OpenVPN (TM) Down Root Plugin -- OpenVPN Plugin +# +# Copyright (C) 2012 Alon Bar-Lev +# + +MAINTAINERCLEANFILES = \ + $(srcdir)/Makefile.in + +AM_CFLAGS = \ + -I$(top_srcdir)/include \ + $(OPTIONAL_CRYPTO_CFLAGS) + +if ENABLE_PLUGIN_DOWN_ROOT +plugin_LTLIBRARIES = openvpn-plugin-down-root.la +dist_doc_DATA = README.down-root +endif + +openvpn_plugin_down_root_la_SOURCES = \ + down-root.c \ + down-root.exports +openvpn_plugin_down_root_la_LDFLAGS = $(AM_LDFLAGS) \ + -export-symbols "$(srcdir)/down-root.exports" \ + -module -shared -avoid-version -no-undefined diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/Makefile.in b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/Makefile.in new file mode 100644 index 00000000..fa06a466 --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/Makefile.in @@ -0,0 +1,563 @@ +# Makefile.in generated by automake 1.10 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006 Free Software Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +# +# OpenVPN (TM) Down Root Plugin -- OpenVPN Plugin +# +# Copyright (C) 2012 Alon Bar-Lev +# + + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +subdir = src/plugins/down-root +DIST_COMMON = $(am__dist_doc_DATA_DIST) $(srcdir)/Makefile.am \ + $(srcdir)/Makefile.in +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/m4/ax_emptyarray.m4 \ + $(top_srcdir)/m4/ax_socklen_t.m4 \ + $(top_srcdir)/m4/ax_varargs.m4 $(top_srcdir)/m4/libtool.m4 \ + $(top_srcdir)/m4/ltoptions.m4 $(top_srcdir)/m4/ltsugar.m4 \ + $(top_srcdir)/m4/ltversion.m4 $(top_srcdir)/m4/lt~obsolete.m4 \ + $(top_srcdir)/m4/pkg.m4 $(top_srcdir)/version.m4 \ + $(top_srcdir)/compat.m4 $(top_srcdir)/configure.ac +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +mkinstalldirs = $(install_sh) -d +CONFIG_HEADER = $(top_builddir)/config.h +CONFIG_CLEAN_FILES = +am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`; +am__vpath_adj = case $$p in \ + $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \ + *) f=$$p;; \ + esac; +am__strip_dir = `echo $$p | sed -e 's|^.*/||'`; +am__installdirs = "$(DESTDIR)$(plugindir)" "$(DESTDIR)$(docdir)" +pluginLTLIBRARIES_INSTALL = $(INSTALL) +LTLIBRARIES = $(plugin_LTLIBRARIES) +openvpn_plugin_down_root_la_LIBADD = +am_openvpn_plugin_down_root_la_OBJECTS = down-root.lo +openvpn_plugin_down_root_la_OBJECTS = \ + $(am_openvpn_plugin_down_root_la_OBJECTS) +openvpn_plugin_down_root_la_LINK = $(LIBTOOL) --tag=CC \ + $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \ + $(AM_CFLAGS) $(CFLAGS) $(openvpn_plugin_down_root_la_LDFLAGS) \ + $(LDFLAGS) -o $@ +@ENABLE_PLUGIN_DOWN_ROOT_TRUE@am_openvpn_plugin_down_root_la_rpath = \ +@ENABLE_PLUGIN_DOWN_ROOT_TRUE@ -rpath $(plugindir) +DEFAULT_INCLUDES = -I. -I$(top_builddir)@am__isrc@ +depcomp = $(SHELL) $(top_srcdir)/depcomp +am__depfiles_maybe = depfiles +COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \ + $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +LTCOMPILE = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \ + --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \ + $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +CCLD = $(CC) +LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \ + --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \ + $(LDFLAGS) -o $@ +SOURCES = $(openvpn_plugin_down_root_la_SOURCES) +DIST_SOURCES = $(openvpn_plugin_down_root_la_SOURCES) +am__dist_doc_DATA_DIST = README.down-root +dist_docDATA_INSTALL = $(INSTALL_DATA) +DATA = $(dist_doc_DATA) +ETAGS = etags +CTAGS = ctags +DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST) +ACLOCAL = @ACLOCAL@ +AMTAR = @AMTAR@ +AR = @AR@ +AS = @AS@ +AUTOCONF = @AUTOCONF@ +AUTOHEADER = @AUTOHEADER@ +AUTOMAKE = @AUTOMAKE@ +AWK = @AWK@ +CC = @CC@ +CCDEPMODE = @CCDEPMODE@ +CFLAGS = @CFLAGS@ +CPP = @CPP@ +CPPFLAGS = @CPPFLAGS@ +CYGPATH_W = @CYGPATH_W@ +DEFS = @DEFS@ +DEPDIR = @DEPDIR@ +DLLTOOL = @DLLTOOL@ +DL_LIBS = @DL_LIBS@ +DSYMUTIL = @DSYMUTIL@ +DUMPBIN = @DUMPBIN@ +ECHO_C = @ECHO_C@ +ECHO_N = @ECHO_N@ +ECHO_T = @ECHO_T@ +EGREP = @EGREP@ +EXEEXT = @EXEEXT@ +FGREP = @FGREP@ +GIT = @GIT@ +GREP = @GREP@ +IFCONFIG = @IFCONFIG@ 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+STRIP = @STRIP@ +TAP_CFLAGS = @TAP_CFLAGS@ +TAP_WIN_COMPONENT_ID = @TAP_WIN_COMPONENT_ID@ +TAP_WIN_MIN_MAJOR = @TAP_WIN_MIN_MAJOR@ +TAP_WIN_MIN_MINOR = @TAP_WIN_MIN_MINOR@ +VERSION = @VERSION@ +abs_builddir = @abs_builddir@ +abs_srcdir = @abs_srcdir@ +abs_top_builddir = @abs_top_builddir@ +abs_top_srcdir = @abs_top_srcdir@ +ac_ct_CC = @ac_ct_CC@ +ac_ct_DUMPBIN = @ac_ct_DUMPBIN@ +am__include = @am__include@ +am__leading_dot = @am__leading_dot@ +am__quote = @am__quote@ +am__tar = @am__tar@ +am__untar = @am__untar@ +bindir = @bindir@ +build = @build@ +build_alias = @build_alias@ +build_cpu = @build_cpu@ +build_os = @build_os@ +build_vendor = @build_vendor@ +builddir = @builddir@ +datadir = @datadir@ +datarootdir = @datarootdir@ +docdir = @docdir@ +dvidir = @dvidir@ +exec_prefix = @exec_prefix@ +host = @host@ +host_alias = @host_alias@ +host_cpu = @host_cpu@ +host_os = @host_os@ +host_vendor = @host_vendor@ +htmldir = @htmldir@ +includedir = @includedir@ +infodir = @infodir@ +install_sh = 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uninstall-pluginLTLIBRARIES + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/README.down-root b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/README.down-root new file mode 100644 index 00000000..d337ffe9 --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/README.down-root @@ -0,0 +1,29 @@ +down-root -- an OpenVPN Plugin Module + +SYNOPSIS + +The down-root module allows an OpenVPN configuration to +call a down script with root privileges, even when privileges +have been dropped using --user/--group/--chroot. + +This module uses a split privilege execution model which will +fork() before OpenVPN drops root privileges, at the point where +the --up script is usually called. The module will then remain +in a wait state until it receives a message from OpenVPN via +pipe to execute the down script. Thus, the down script will be +run in the same execution environment as the up script. + +BUILD + +Build this module with the "make" command. The plugin +module will be named openvpn-down-root.so + +USAGE + +To use this module, add to your OpenVPN config file: + + plugin openvpn-down-root.so "command ..." + +CAVEATS + +This module will only work on *nix systems, not Windows. diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/down-root.c b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/down-root.c new file mode 100644 index 00000000..d51d0e55 --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/down-root.c @@ -0,0 +1,557 @@ +/* + * OpenVPN -- An application to securely tunnel IP networks + * over a single TCP/UDP port, with support for SSL/TLS-based + * session authentication and key exchange, + * packet encryption, packet authentication, and + * packet compression. + * + * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program (see the file COPYING included with this + * distribution); if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * OpenVPN plugin module to do privileged down-script execution. + */ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define DEBUG(verb) ((verb) >= 7) + +/* Command codes for foreground -> background communication */ +#define COMMAND_RUN_SCRIPT 0 +#define COMMAND_EXIT 1 + +/* Response codes for background -> foreground communication */ +#define RESPONSE_INIT_SUCCEEDED 10 +#define RESPONSE_INIT_FAILED 11 +#define RESPONSE_SCRIPT_SUCCEEDED 12 +#define RESPONSE_SCRIPT_FAILED 13 + +/* Background process function */ +static void down_root_server (const int fd, char *command, const char *argv[], const char *envp[], const int verb); + +/* + * Plugin state, used by foreground + */ +struct down_root_context +{ + /* Foreground's socket to background process */ + int foreground_fd; + + /* Process ID of background process */ + pid_t background_pid; + + /* Verbosity level of OpenVPN */ + int verb; + + /* down command */ + char *command; +}; + +/* + * Given an environmental variable name, search + * the envp array for its value, returning it + * if found or NULL otherwise. + */ +static const char * +get_env (const char *name, const char *envp[]) +{ + if (envp) + { + int i; + const int namelen = strlen (name); + for (i = 0; envp[i]; ++i) + { + if (!strncmp (envp[i], name, namelen)) + { + const char *cp = envp[i] + namelen; + if (*cp == '=') + return cp + 1; + } + } + } + return NULL; +} + +/* + * Return the length of a string array + */ +static int +string_array_len (const char *array[]) +{ + int i = 0; + if (array) + { + while (array[i]) + ++i; + } + return i; +} + +/* + * Socket read/write functions. + */ + +static int +recv_control (int fd) +{ + unsigned char c; + const ssize_t size = read (fd, &c, sizeof (c)); + if (size == sizeof (c)) + return c; + else + return -1; +} + +static int +send_control (int fd, int code) +{ + unsigned char c = (unsigned char) code; + const ssize_t size = write (fd, &c, sizeof (c)); + if (size == sizeof (c)) + return (int) size; + else + return -1; +} + +/* + * Daemonize if "daemon" env var is true. + * Preserve stderr across daemonization if + * "daemon_log_redirect" env var is true. + */ +static void +daemonize (const char *envp[]) +{ + const char *daemon_string = get_env ("daemon", envp); + if (daemon_string && daemon_string[0] == '1') + { + const char *log_redirect = get_env ("daemon_log_redirect", envp); + int fd = -1; + if (log_redirect && log_redirect[0] == '1') + fd = dup (2); + if (daemon (0, 0) < 0) + { + fprintf (stderr, "DOWN-ROOT: daemonization failed\n"); + } + else if (fd >= 3) + { + dup2 (fd, 2); + close (fd); + } + } +} + +/* + * Close most of parent's fds. + * Keep stdin/stdout/stderr, plus one + * other fd which is presumed to be + * our pipe back to parent. + * Admittedly, a bit of a kludge, + * but posix doesn't give us a kind + * of FD_CLOEXEC which will stop + * fds from crossing a fork(). + */ +static void +close_fds_except (int keep) +{ + int i; + closelog (); + for (i = 3; i <= 100; ++i) + { + if (i != keep) + close (i); + } +} + +/* + * Usually we ignore signals, because our parent will + * deal with them. + */ +static void +set_signals (void) +{ + signal (SIGTERM, SIG_DFL); + + signal (SIGINT, SIG_IGN); + signal (SIGHUP, SIG_IGN); + signal (SIGUSR1, SIG_IGN); + signal (SIGUSR2, SIG_IGN); + signal (SIGPIPE, SIG_IGN); +} + +/* + * convert system() return into a success/failure value + */ +int +system_ok (int stat) +{ +#ifdef WIN32 + return stat == 0; +#else + return stat != -1 && WIFEXITED (stat) && WEXITSTATUS (stat) == 0; +#endif +} + +static char * +build_command_line (const char *argv[]) +{ + int size = 0; + int n = 0; + int i; + char *string; + + /* precompute size */ + if (argv) + { + for (i = 0; argv[i]; ++i) + { + size += (strlen (argv[i]) + 1); /* string length plus trailing space */ + ++n; + } + } + ++size; /* for null terminator */ + + /* allocate memory */ + string = (char *) malloc (size); + if (!string) + { + fprintf (stderr, "DOWN-ROOT: out of memory\n"); + exit (1); + } + string[0] = '\0'; + + /* build string */ + for (i = 0; i < n; ++i) + { + strcat (string, argv[i]); + if (i + 1 < n) + strcat (string, " "); + } + return string; +} + +static void +free_context (struct down_root_context *context) +{ + if (context) + { + if (context->command) + free (context->command); + free (context); + } +} + +OPENVPN_EXPORT openvpn_plugin_handle_t +openvpn_plugin_open_v1 (unsigned int *type_mask, const char *argv[], const char *envp[]) +{ + struct down_root_context *context; + + /* + * Allocate our context + */ + context = (struct down_root_context *) calloc (1, sizeof (struct down_root_context)); + if (!context) + goto error; + context->foreground_fd = -1; + + /* + * Intercept the --up and --down callbacks + */ + *type_mask = OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_UP) | OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_DOWN); + + /* + * Make sure we have two string arguments: the first is the .so name, + * the second is the script command. + */ + if (string_array_len (argv) < 2) + { + fprintf (stderr, "DOWN-ROOT: need down script command\n"); + goto error; + } + + /* + * Save our argument in context + */ + context->command = build_command_line (&argv[1]); + + /* + * Get verbosity level from environment + */ + { + const char *verb_string = get_env ("verb", envp); + if (verb_string) + context->verb = atoi (verb_string); + } + + return (openvpn_plugin_handle_t) context; + + error: + free_context (context); + return NULL; +} + +OPENVPN_EXPORT int +openvpn_plugin_func_v1 (openvpn_plugin_handle_t handle, const int type, const char *argv[], const char *envp[]) +{ + struct down_root_context *context = (struct down_root_context *) handle; + + if (type == OPENVPN_PLUGIN_UP && context->foreground_fd == -1) /* fork off a process to hold onto root */ + { + pid_t pid; + int fd[2]; + + /* + * Make a socket for foreground and background processes + * to communicate. + */ + if (socketpair (PF_UNIX, SOCK_DGRAM, 0, fd) == -1) + { + fprintf (stderr, "DOWN-ROOT: socketpair call failed\n"); + return OPENVPN_PLUGIN_FUNC_ERROR; + } + + /* + * Fork off the privileged process. It will remain privileged + * even after the foreground process drops its privileges. + */ + pid = fork (); + + if (pid) + { + int status; + + /* + * Foreground Process + */ + + context->background_pid = pid; + + /* close our copy of child's socket */ + close (fd[1]); + + /* don't let future subprocesses inherit child socket */ + if (fcntl (fd[0], F_SETFD, FD_CLOEXEC) < 0) + fprintf (stderr, "DOWN-ROOT: Set FD_CLOEXEC flag on socket file descriptor failed\n"); + + /* wait for background child process to initialize */ + status = recv_control (fd[0]); + if (status == RESPONSE_INIT_SUCCEEDED) + { + context->foreground_fd = fd[0]; + return OPENVPN_PLUGIN_FUNC_SUCCESS; + } + } + else + { + /* + * Background Process + */ + + /* close all parent fds except our socket back to parent */ + close_fds_except (fd[1]); + + /* Ignore most signals (the parent will receive them) */ + set_signals (); + + /* Daemonize if --daemon option is set. */ + daemonize (envp); + + /* execute the event loop */ + down_root_server (fd[1], context->command, argv, envp, context->verb); + + close (fd[1]); + exit (0); + return 0; /* NOTREACHED */ + } + } + else if (type == OPENVPN_PLUGIN_DOWN && context->foreground_fd >= 0) + { + if (send_control (context->foreground_fd, COMMAND_RUN_SCRIPT) == -1) + { + fprintf (stderr, "DOWN-ROOT: Error sending script execution signal to background process\n"); + } + else + { + const int status = recv_control (context->foreground_fd); + if (status == RESPONSE_SCRIPT_SUCCEEDED) + return OPENVPN_PLUGIN_FUNC_SUCCESS; + if (status == -1) + fprintf (stderr, "DOWN-ROOT: Error receiving script execution confirmation from background process\n"); + } + } + return OPENVPN_PLUGIN_FUNC_ERROR; +} + +OPENVPN_EXPORT void +openvpn_plugin_close_v1 (openvpn_plugin_handle_t handle) +{ + struct down_root_context *context = (struct down_root_context *) handle; + + if (DEBUG (context->verb)) + fprintf (stderr, "DOWN-ROOT: close\n"); + + if (context->foreground_fd >= 0) + { + /* tell background process to exit */ + if (send_control (context->foreground_fd, COMMAND_EXIT) == -1) + fprintf (stderr, "DOWN-ROOT: Error signaling background process to exit\n"); + + /* wait for background process to exit */ + if (context->background_pid > 0) + waitpid (context->background_pid, NULL, 0); + + close (context->foreground_fd); + context->foreground_fd = -1; + } + + free_context (context); +} + +OPENVPN_EXPORT void +openvpn_plugin_abort_v1 (openvpn_plugin_handle_t handle) +{ + struct down_root_context *context = (struct down_root_context *) handle; + + if (context && context->foreground_fd >= 0) + { + /* tell background process to exit */ + send_control (context->foreground_fd, COMMAND_EXIT); + close (context->foreground_fd); + context->foreground_fd = -1; + } +} + +/* + * Background process -- runs with privilege. + */ +static void +down_root_server (const int fd, char *command, const char *argv[], const char *envp[], const int verb) +{ + const char *p[3]; + char *command_line = NULL; + char *argv_cat = NULL; + int i; + + /* + * Do initialization + */ + if (DEBUG (verb)) + fprintf (stderr, "DOWN-ROOT: BACKGROUND: INIT command='%s'\n", command); + + /* + * Tell foreground that we initialized successfully + */ + if (send_control (fd, RESPONSE_INIT_SUCCEEDED) == -1) + { + fprintf (stderr, "DOWN-ROOT: BACKGROUND: write error on response socket [1]\n"); + goto done; + } + + /* + * Build command line + */ + if (string_array_len (argv) >= 2) + argv_cat = build_command_line (&argv[1]); + else + argv_cat = build_command_line (NULL); + p[0] = command; + p[1] = argv_cat; + p[2] = NULL; + command_line = build_command_line (p); + + /* + * Save envp in environment + */ + for (i = 0; envp[i]; ++i) + { + putenv ((char *)envp[i]); + } + + /* + * Event loop + */ + while (1) + { + int command_code; + int status; + + /* get a command from foreground process */ + command_code = recv_control (fd); + + if (DEBUG (verb)) + fprintf (stderr, "DOWN-ROOT: BACKGROUND: received command code: %d\n", command_code); + + switch (command_code) + { + case COMMAND_RUN_SCRIPT: + status = system (command_line); + if (system_ok (status)) /* Succeeded */ + { + if (send_control (fd, RESPONSE_SCRIPT_SUCCEEDED) == -1) + { + fprintf (stderr, "DOWN-ROOT: BACKGROUND: write error on response socket [2]\n"); + goto done; + } + } + else /* Failed */ + { + if (send_control (fd, RESPONSE_SCRIPT_FAILED) == -1) + { + fprintf (stderr, "DOWN-ROOT: BACKGROUND: write error on response socket [3]\n"); + goto done; + } + } + break; + + case COMMAND_EXIT: + goto done; + + case -1: + fprintf (stderr, "DOWN-ROOT: BACKGROUND: read error on command channel\n"); + goto done; + + default: + fprintf (stderr, "DOWN-ROOT: BACKGROUND: unknown command code: code=%d, exiting\n", + command_code); + goto done; + } + } + + done: + if (argv_cat) + free (argv_cat); + if (command_line) + free (command_line); + if (DEBUG (verb)) + fprintf (stderr, "DOWN-ROOT: BACKGROUND: EXIT\n"); + + return; +} diff --git a/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/down-root.exports b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/down-root.exports new file mode 100644 index 00000000..b07937cc --- /dev/null +++ b/ics-openvpn-stripped/main/openvpn/src/plugins/down-root/down-root.exports @@ -0,0 +1,4 @@ +openvpn_plugin_open_v1 +openvpn_plugin_func_v1 +openvpn_plugin_close_v1 +openvpn_plugin_abort_v1 -- cgit v1.2.3