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author | Yves-Alexis Perez <corsac@debian.org> | 2013-01-02 14:18:20 +0100 |
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committer | Yves-Alexis Perez <corsac@debian.org> | 2013-01-02 14:18:20 +0100 |
commit | c1343b3278cdf99533b7902744d15969f9d6fdc1 (patch) | |
tree | d5ed3dc5677a59260ec41cd39bb284d3e94c91b3 /src/libcharon/plugins/eap_dynamic | |
parent | b34738ed08c2227300d554b139e2495ca5da97d6 (diff) | |
download | vyos-strongswan-c1343b3278cdf99533b7902744d15969f9d6fdc1.tar.gz vyos-strongswan-c1343b3278cdf99533b7902744d15969f9d6fdc1.zip |
Imported Upstream version 5.0.1
Diffstat (limited to 'src/libcharon/plugins/eap_dynamic')
-rw-r--r-- | src/libcharon/plugins/eap_dynamic/Makefile.am | 16 | ||||
-rw-r--r-- | src/libcharon/plugins/eap_dynamic/Makefile.in | 621 | ||||
-rw-r--r-- | src/libcharon/plugins/eap_dynamic/eap_dynamic.c | 393 | ||||
-rw-r--r-- | src/libcharon/plugins/eap_dynamic/eap_dynamic.h | 52 | ||||
-rw-r--r-- | src/libcharon/plugins/eap_dynamic/eap_dynamic_plugin.c | 62 | ||||
-rw-r--r-- | src/libcharon/plugins/eap_dynamic/eap_dynamic_plugin.h | 43 |
6 files changed, 1187 insertions, 0 deletions
diff --git a/src/libcharon/plugins/eap_dynamic/Makefile.am b/src/libcharon/plugins/eap_dynamic/Makefile.am new file mode 100644 index 000000000..0d07fbf35 --- /dev/null +++ b/src/libcharon/plugins/eap_dynamic/Makefile.am @@ -0,0 +1,16 @@ + +INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \ + -I$(top_srcdir)/src/libcharon + +AM_CFLAGS = -rdynamic + +if MONOLITHIC +noinst_LTLIBRARIES = libstrongswan-eap-dynamic.la +else +plugin_LTLIBRARIES = libstrongswan-eap-dynamic.la +endif + +libstrongswan_eap_dynamic_la_SOURCES = \ + eap_dynamic_plugin.h eap_dynamic_plugin.c eap_dynamic.h eap_dynamic.c + +libstrongswan_eap_dynamic_la_LDFLAGS = -module -avoid-version diff --git a/src/libcharon/plugins/eap_dynamic/Makefile.in b/src/libcharon/plugins/eap_dynamic/Makefile.in new file mode 100644 index 000000000..bf467ebeb --- /dev/null +++ b/src/libcharon/plugins/eap_dynamic/Makefile.in @@ -0,0 +1,621 @@ +# Makefile.in generated by automake 1.11.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009 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@ + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@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/libcharon/plugins/eap_dynamic +DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/m4/config/libtool.m4 \ + $(top_srcdir)/m4/config/ltoptions.m4 \ + $(top_srcdir)/m4/config/ltsugar.m4 \ + $(top_srcdir)/m4/config/ltversion.m4 \ + $(top_srcdir)/m4/config/lt~obsolete.m4 \ + $(top_srcdir)/m4/macros/with.m4 \ + $(top_srcdir)/m4/macros/enable-disable.m4 \ + $(top_srcdir)/m4/macros/add-plugin.m4 \ + $(top_srcdir)/configure.in +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +mkinstalldirs = $(install_sh) -d +CONFIG_HEADER = $(top_builddir)/config.h +CONFIG_CLEAN_FILES = +CONFIG_CLEAN_VPATH_FILES = +am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 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maintainer-clean maintainer-clean-generic mostlyclean \ + mostlyclean-compile mostlyclean-generic mostlyclean-libtool \ + pdf pdf-am ps ps-am tags uninstall uninstall-am \ + 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/src/libcharon/plugins/eap_dynamic/eap_dynamic.c b/src/libcharon/plugins/eap_dynamic/eap_dynamic.c new file mode 100644 index 000000000..d24cbd128 --- /dev/null +++ b/src/libcharon/plugins/eap_dynamic/eap_dynamic.c @@ -0,0 +1,393 @@ +/* + * Copyright (C) 2012 Tobias Brunner + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +#include "eap_dynamic.h" + +#include <daemon.h> +#include <library.h> + +typedef struct private_eap_dynamic_t private_eap_dynamic_t; + +/** + * Private data of an eap_dynamic_t object. + */ +struct private_eap_dynamic_t { + + /** + * Public authenticator_t interface. + */ + eap_dynamic_t public; + + /** + * ID of the server + */ + identification_t *server; + + /** + * ID of the peer + */ + identification_t *peer; + + /** + * Our supported EAP types (as eap_vendor_type_t*) + */ + linked_list_t *types; + + /** + * EAP types supported by peer, if any + */ + linked_list_t *other_types; + + /** + * Prefer types sent by peer + */ + bool prefer_peer; + + /** + * The proxied EAP method + */ + eap_method_t *method; +}; + +/** + * Compare two eap_vendor_type_t objects + */ +static bool entry_matches(eap_vendor_type_t *item, eap_vendor_type_t *other) +{ + return item->type == other->type && item->vendor == other->vendor; +} + +/** + * Load the given EAP method + */ +static eap_method_t *load_method(private_eap_dynamic_t *this, + eap_type_t type, u_int32_t vendor) +{ + eap_method_t *method; + + method = charon->eap->create_instance(charon->eap, type, vendor, EAP_SERVER, + this->server, this->peer); + if (!method) + { + if (vendor) + { + DBG1(DBG_IKE, "loading vendor specific EAP method %d-%d failed", + type, vendor); + } + else + { + DBG1(DBG_IKE, "loading %N method failed", eap_type_names, type); + } + } + return method; +} + +/** + * Select the first method we can instantiate and is supported by both peers. + */ +static void select_method(private_eap_dynamic_t *this) +{ + eap_vendor_type_t *entry; + linked_list_t *outer = this->types, *inner = this->other_types; + char *who = "peer"; + + if (this->other_types && this->prefer_peer) + { + outer = this->other_types; + inner = this->types; + who = "us"; + } + + while (outer->remove_first(outer, (void*)&entry) == SUCCESS) + { + if (inner) + { + if (inner->find_first(inner, (void*)entry_matches, + NULL, entry) != SUCCESS) + { + if (entry->vendor) + { + DBG2(DBG_IKE, "proposed vendor specific EAP method %d-%d " + "not supported by %s, skipped", entry->type, + entry->vendor, who); + } + else + { + DBG2(DBG_IKE, "proposed %N method not supported by %s, " + "skipped", eap_type_names, entry->type, who); + } + free(entry); + continue; + } + } + this->method = load_method(this, entry->type, entry->vendor); + if (this->method) + { + if (entry->vendor) + { + DBG1(DBG_IKE, "vendor specific EAP method %d-%d selected", + entry->type, entry->vendor); + } + else + { + DBG1(DBG_IKE, "%N method selected", eap_type_names, + entry->type); + } + free(entry); + break; + } + free(entry); + } +} + +METHOD(eap_method_t, initiate, status_t, + private_eap_dynamic_t *this, eap_payload_t **out) +{ + if (!this->method) + { + select_method(this); + if (!this->method) + { + DBG1(DBG_IKE, "no supported EAP method found"); + return FAILED; + } + } + return this->method->initiate(this->method, out); +} + +METHOD(eap_method_t, process, status_t, + private_eap_dynamic_t *this, eap_payload_t *in, eap_payload_t **out) +{ + eap_type_t received_type, type; + u_int32_t received_vendor, vendor; + + received_type = in->get_type(in, &received_vendor); + if (received_vendor == 0 && received_type == EAP_NAK) + { + enumerator_t *enumerator; + + DBG1(DBG_IKE, "received %N, selecting a different EAP method", + eap_type_names, EAP_NAK); + + if (this->other_types) + { /* we already received a Nak or a proper response before */ + DBG1(DBG_IKE, "%N is not supported in this state", eap_type_names, + EAP_NAK); + return FAILED; + } + + this->other_types = linked_list_create(); + enumerator = in->get_types(in); + while (enumerator->enumerate(enumerator, &type, &vendor)) + { + eap_vendor_type_t *entry; + + if (!type) + { + DBG1(DBG_IKE, "peer does not support any other EAP methods"); + enumerator->destroy(enumerator); + return FAILED; + } + INIT(entry, + .type = type, + .vendor = vendor, + ); + this->other_types->insert_last(this->other_types, entry); + } + enumerator->destroy(enumerator); + + /* restart with a different method */ + this->method->destroy(this->method); + this->method = NULL; + return initiate(this, out); + } + if (!this->other_types) + { /* so we don't handle EAP-Naks later */ + this->other_types = linked_list_create(); + } + if (this->method) + { + return this->method->process(this->method, in, out); + } + return FAILED; +} + +METHOD(eap_method_t, get_type, eap_type_t, + private_eap_dynamic_t *this, u_int32_t *vendor) +{ + if (this->method) + { + return this->method->get_type(this->method, vendor); + } + *vendor = 0; + return EAP_DYNAMIC; +} + +METHOD(eap_method_t, get_msk, status_t, + private_eap_dynamic_t *this, chunk_t *msk) +{ + if (this->method) + { + return this->method->get_msk(this->method, msk); + } + return FAILED; +} + +METHOD(eap_method_t, get_identifier, u_int8_t, + private_eap_dynamic_t *this) +{ + if (this->method) + { + return this->method->get_identifier(this->method); + } + return 0; +} + +METHOD(eap_method_t, set_identifier, void, + private_eap_dynamic_t *this, u_int8_t identifier) +{ + if (this->method) + { + this->method->set_identifier(this->method, identifier); + } +} + +METHOD(eap_method_t, is_mutual, bool, + private_eap_dynamic_t *this) +{ + if (this->method) + { + return this->method->is_mutual(this->method); + } + return FALSE; +} + +METHOD(eap_method_t, destroy, void, + private_eap_dynamic_t *this) +{ + DESTROY_IF(this->method); + this->types->destroy_function(this->types, (void*)free); + DESTROY_FUNCTION_IF(this->other_types, (void*)free); + this->server->destroy(this->server); + this->peer->destroy(this->peer); + free(this); +} + +/** + * Parse preferred EAP types + */ +static void handle_preferred_eap_types(private_eap_dynamic_t *this, + char *methods) +{ + enumerator_t *enumerator; + eap_vendor_type_t *type, *entry; + linked_list_t *preferred; + char *method; + + /* parse preferred EAP methods, format: type[-vendor], ... */ + preferred = linked_list_create(); + enumerator = enumerator_create_token(methods, ",", " "); + while (enumerator->enumerate(enumerator, &method)) + { + type = eap_vendor_type_from_string(method); + if (type) + { + preferred->insert_last(preferred, type); + } + } + enumerator->destroy(enumerator); + + enumerator = this->types->create_enumerator(this->types); + while (preferred->remove_last(preferred, (void**)&type) == SUCCESS) + { /* move (supported) types to the front, maintain the preferred order */ + this->types->reset_enumerator(this->types, enumerator); + while (enumerator->enumerate(enumerator, &entry)) + { + if (entry_matches(entry, type)) + { + this->types->remove_at(this->types, enumerator); + this->types->insert_first(this->types, entry); + break; + } + } + free(type); + } + enumerator->destroy(enumerator); + preferred->destroy(preferred); +} + +/** + * Get all supported EAP methods + */ +static void get_supported_eap_types(private_eap_dynamic_t *this) +{ + enumerator_t *enumerator; + eap_type_t type; + u_int32_t vendor; + + enumerator = charon->eap->create_enumerator(charon->eap, EAP_SERVER); + while (enumerator->enumerate(enumerator, &type, &vendor)) + { + eap_vendor_type_t *entry; + + INIT(entry, + .type = type, + .vendor = vendor, + ); + this->types->insert_last(this->types, entry); + } + enumerator->destroy(enumerator); +} + +/* + * Defined in header + */ +eap_dynamic_t *eap_dynamic_create(identification_t *server, + identification_t *peer) +{ + private_eap_dynamic_t *this; + char *preferred; + + INIT(this, + .public = { + .interface = { + .initiate = _initiate, + .process = _process, + .get_type = _get_type, + .is_mutual = _is_mutual, + .get_msk = _get_msk, + .get_identifier = _get_identifier, + .set_identifier = _set_identifier, + .destroy = _destroy, + }, + }, + .peer = peer->clone(peer), + .server = server->clone(server), + .types = linked_list_create(), + .prefer_peer = lib->settings->get_bool(lib->settings, + "%s.plugins.eap-dynamic.prefer_peer", FALSE, charon->name), + ); + + /* get all supported EAP methods */ + get_supported_eap_types(this); + /* move preferred methods to the front */ + preferred = lib->settings->get_str(lib->settings, + "%s.plugins.eap-dynamic.preferred", NULL, charon->name); + if (preferred) + { + handle_preferred_eap_types(this, preferred); + } + return &this->public; +} diff --git a/src/libcharon/plugins/eap_dynamic/eap_dynamic.h b/src/libcharon/plugins/eap_dynamic/eap_dynamic.h new file mode 100644 index 000000000..35db4fa26 --- /dev/null +++ b/src/libcharon/plugins/eap_dynamic/eap_dynamic.h @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2012 Tobias Brunner + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup eap_dynamic_i eap_dynamic + * @{ @ingroup eap_dynamic + */ + +#ifndef EAP_DYNAMIC_H_ +#define EAP_DYNAMIC_H_ + +typedef struct eap_dynamic_t eap_dynamic_t; + +#include <sa/eap/eap_method.h> + +/** + * Implementation of the eap_method_t interface for a virtual EAP method that + * proxies other EAP methods and supports the selection of the actual method + * by the client. + */ +struct eap_dynamic_t { + + /** + * Implemented eap_method_t interface + */ + eap_method_t interface; +}; + +/** + * Create a dynamic EAP proxy serving any supported real method which is also + * supported (or selected) by the client. + * + * @param server ID of the EAP server + * @param peer ID of the EAP client + * @return eap_dynamic_t object + */ +eap_dynamic_t *eap_dynamic_create(identification_t *server, + identification_t *peer); + +#endif /** EAP_DYNAMIC_H_ @}*/ diff --git a/src/libcharon/plugins/eap_dynamic/eap_dynamic_plugin.c b/src/libcharon/plugins/eap_dynamic/eap_dynamic_plugin.c new file mode 100644 index 000000000..d6f38b666 --- /dev/null +++ b/src/libcharon/plugins/eap_dynamic/eap_dynamic_plugin.c @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2012 Tobias Brunner + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +#include "eap_dynamic_plugin.h" + +#include "eap_dynamic.h" + +#include <daemon.h> + +METHOD(plugin_t, get_name, char*, + eap_dynamic_plugin_t *this) +{ + return "eap-dynamic"; +} + +METHOD(plugin_t, get_features, int, + eap_dynamic_plugin_t *this, plugin_feature_t *features[]) +{ + static plugin_feature_t f[] = { + PLUGIN_CALLBACK(eap_method_register, eap_dynamic_create), + PLUGIN_PROVIDE(EAP_SERVER, EAP_DYNAMIC), + }; + *features = f; + return countof(f); +} + +METHOD(plugin_t, destroy, void, + eap_dynamic_plugin_t *this) +{ + free(this); +} + +/* + * see header file + */ +plugin_t *eap_dynamic_plugin_create() +{ + eap_dynamic_plugin_t *this; + + INIT(this, + .plugin = { + .get_name = _get_name, + .get_features = _get_features, + .destroy = _destroy, + }, + ); + + return &this->plugin; +} + diff --git a/src/libcharon/plugins/eap_dynamic/eap_dynamic_plugin.h b/src/libcharon/plugins/eap_dynamic/eap_dynamic_plugin.h new file mode 100644 index 000000000..9b124d8d2 --- /dev/null +++ b/src/libcharon/plugins/eap_dynamic/eap_dynamic_plugin.h @@ -0,0 +1,43 @@ +/* + * Copyright (C) 2012 Tobias Brunner + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup eap_dynamic eap_dynamic + * @ingroup cplugins + * + * @defgroup eap_dynamic_plugin eap_dynamic_plugin + * @{ @ingroup eap_dynamic + */ + +#ifndef EAP_DYNAMIC_PLUGIN_H_ +#define EAP_DYNAMIC_PLUGIN_H_ + +#include <plugins/plugin.h> + +typedef struct eap_dynamic_plugin_t eap_dynamic_plugin_t; + +/** + * EAP plugin that can use any supported EAP method the client supports or + * prefers to use. + */ +struct eap_dynamic_plugin_t { + + /** + * implements plugin interface + */ + plugin_t plugin; +}; + +#endif /** EAP_DYNAMIC_PLUGIN_H_ @}*/ |