diff options
Diffstat (limited to 'src/libcharon/plugins/eap_peap')
| -rw-r--r-- | src/libcharon/plugins/eap_peap/Makefile.am | 21 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/Makefile.in | 617 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap.c | 213 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap.h | 59 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap_avp.c | 152 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap_avp.h | 71 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap_peer.c | 256 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap_peer.h | 49 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap_plugin.c | 59 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap_plugin.h | 47 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap_server.c | 432 | ||||
| -rw-r--r-- | src/libcharon/plugins/eap_peap/eap_peap_server.h | 49 |
12 files changed, 2025 insertions, 0 deletions
diff --git a/src/libcharon/plugins/eap_peap/Makefile.am b/src/libcharon/plugins/eap_peap/Makefile.am new file mode 100644 index 000000000..81f2575c7 --- /dev/null +++ b/src/libcharon/plugins/eap_peap/Makefile.am @@ -0,0 +1,21 @@ + +INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \ + -I$(top_srcdir)/src/libcharon -I$(top_srcdir)/src/libtls + +AM_CFLAGS = -rdynamic + +if MONOLITHIC +noinst_LTLIBRARIES = libstrongswan-eap-peap.la +else +plugin_LTLIBRARIES = libstrongswan-eap-peap.la +libstrongswan_eap_peap_la_LIBADD = $(top_builddir)/src/libtls/libtls.la +endif + +libstrongswan_eap_peap_la_SOURCES = \ + eap_peap_plugin.h eap_peap_plugin.c \ + eap_peap.h eap_peap.c \ + eap_peap_peer.h eap_peap_peer.c \ + eap_peap_server.h eap_peap_server.c \ + eap_peap_avp.h eap_peap_avp.c + +libstrongswan_eap_peap_la_LDFLAGS = -module -avoid-version diff --git a/src/libcharon/plugins/eap_peap/Makefile.in b/src/libcharon/plugins/eap_peap/Makefile.in new file mode 100644 index 000000000..0ed4a3dcf --- /dev/null +++ b/src/libcharon/plugins/eap_peap/Makefile.in @@ -0,0 +1,617 @@ +# 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)" && 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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-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_peap/eap_peap.c b/src/libcharon/plugins/eap_peap/eap_peap.c new file mode 100644 index 000000000..5bae0fa9b --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap.c @@ -0,0 +1,213 @@ +/* + * Copyright (C) 2010 Martin Willi, revosec AG + * Copyright (C) 2010 Andreas Steffen, HSR 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_peap.h" +#include "eap_peap_peer.h" +#include "eap_peap_server.h" + +#include <tls_eap.h> + +#include <daemon.h> +#include <library.h> + +typedef struct private_eap_peap_t private_eap_peap_t; + +/** + * Private data of an eap_peap_t object. + */ +struct private_eap_peap_t { + + /** + * Public interface. + */ + eap_peap_t public; + + /** + * TLS stack, wrapped by EAP helper + */ + tls_eap_t *tls_eap; +}; + +/** Maximum number of EAP-PEAP messages/fragments allowed */ +#define MAX_MESSAGE_COUNT 32 +/** Default size of a EAP-PEAP fragment */ +#define MAX_FRAGMENT_LEN 1024 + +METHOD(eap_method_t, initiate, status_t, + private_eap_peap_t *this, eap_payload_t **out) +{ + chunk_t data; + + if (this->tls_eap->initiate(this->tls_eap, &data) == NEED_MORE) + { + *out = eap_payload_create_data(data); + free(data.ptr); + return NEED_MORE; + } + return FAILED; +} + +METHOD(eap_method_t, process, status_t, + private_eap_peap_t *this, eap_payload_t *in, eap_payload_t **out) +{ + status_t status; + chunk_t data; + + data = in->get_data(in); + status = this->tls_eap->process(this->tls_eap, data, &data); + if (status == NEED_MORE) + { + *out = eap_payload_create_data(data); + free(data.ptr); + } + return status; +} + +METHOD(eap_method_t, get_type, eap_type_t, + private_eap_peap_t *this, u_int32_t *vendor) +{ + *vendor = 0; + return EAP_PEAP; +} + +METHOD(eap_method_t, get_msk, status_t, + private_eap_peap_t *this, chunk_t *msk) +{ + *msk = this->tls_eap->get_msk(this->tls_eap); + if (msk->len) + { + return SUCCESS; + } + return FAILED; +} + +METHOD(eap_method_t, get_identifier, u_int8_t, + private_eap_peap_t *this) +{ + return this->tls_eap->get_identifier(this->tls_eap); +} + +METHOD(eap_method_t, set_identifier, void, + private_eap_peap_t *this, u_int8_t identifier) +{ + this->tls_eap->set_identifier(this->tls_eap, identifier); +} + +METHOD(eap_method_t, is_mutual, bool, + private_eap_peap_t *this) +{ + return TRUE; +} + +METHOD(eap_method_t, destroy, void, + private_eap_peap_t *this) +{ + this->tls_eap->destroy(this->tls_eap); + free(this); +} + +/** + * Create an empty private eap_peap_t object + */ +static private_eap_peap_t *eap_peap_create_empty(void) +{ + private_eap_peap_t *this; + + INIT(this, + .public = { + .eap_method = { + .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, + }, + }, + ); + return this; +} + +/** + * Generic private constructor + */ +static eap_peap_t *eap_peap_create(private_eap_peap_t * this, + identification_t *server, + identification_t *peer, bool is_server, + tls_application_t *application) +{ + size_t frag_size; + int max_msg_count; + bool include_length; + tls_t *tls; + + if (is_server && !lib->settings->get_bool(lib->settings, + "charon.plugins.eap-peap.request_peer_auth", FALSE)) + { + peer = NULL; + } + frag_size = lib->settings->get_int(lib->settings, + "charon.plugins.eap-peap.fragment_size", MAX_FRAGMENT_LEN); + max_msg_count = lib->settings->get_int(lib->settings, + "charon.plugins.eap-peap.max_message_count", MAX_MESSAGE_COUNT); + include_length = lib->settings->get_bool(lib->settings, + "charon.plugins.eap-peap.include_length", FALSE); + tls = tls_create(is_server, server, peer, TLS_PURPOSE_EAP_PEAP, application); + this->tls_eap = tls_eap_create(EAP_PEAP, tls, frag_size, max_msg_count, + include_length); + if (!this->tls_eap) + { + application->destroy(application); + free(this); + return NULL; + } + return &this->public; +} + +eap_peap_t *eap_peap_create_server(identification_t *server, + identification_t *peer) +{ + private_eap_peap_t *eap_peap; + eap_method_t *eap_method; + eap_peap_server_t *eap_peap_server; + tls_application_t *application; + + /* the tunneled application needs a reference to the outer EAP-PEAP method */ + eap_peap = eap_peap_create_empty(); + eap_method = &eap_peap->public.eap_method; + eap_peap_server = eap_peap_server_create(server, peer, eap_method); + application = &eap_peap_server->application; + + return eap_peap_create(eap_peap, server, peer, TRUE, application); +} + +eap_peap_t *eap_peap_create_peer(identification_t *server, + identification_t *peer) +{ + private_eap_peap_t *eap_peap; + eap_method_t *eap_method; + eap_peap_peer_t *eap_peap_peer; + tls_application_t *application; + + /* the tunneled application needs a reference to the outer EAP-PEAP method */ + eap_peap = eap_peap_create_empty(); + eap_method = &eap_peap->public.eap_method; + eap_peap_peer = eap_peap_peer_create(server, peer, eap_method); + application = &eap_peap_peer->application; + + return eap_peap_create(eap_peap, server, peer, FALSE, application); +} diff --git a/src/libcharon/plugins/eap_peap/eap_peap.h b/src/libcharon/plugins/eap_peap/eap_peap.h new file mode 100644 index 000000000..f47bad561 --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap.h @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2011 Andreas Steffen + * Copyright (C) 2011 HSR 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_peap_i eap_peap + * @{ @ingroup eap_peap + */ + +#ifndef EAP_PEAP_H_ +#define EAP_PEAP_H_ + +typedef struct eap_peap_t eap_peap_t; + +#include <sa/authenticators/eap/eap_method.h> + +/** + * Implementation of eap_method_t using EAP-PEAP. + */ +struct eap_peap_t { + + /** + * Implements eap_method_t interface. + */ + eap_method_t eap_method; +}; + +/** + * Creates the EAP method EAP-PEAP acting as server. + * + * @param server ID of the EAP server + * @param peer ID of the EAP client + * @return eap_peap_t object + */ +eap_peap_t *eap_peap_create_server(identification_t *server, + identification_t *peer); + +/** + * Creates the EAP method EAP-PEAP acting as peer. + * + * @param server ID of the EAP server + * @param peer ID of the EAP client + * @return eap_peap_t object + */ +eap_peap_t *eap_peap_create_peer(identification_t *server, + identification_t *peer); + +#endif /** EAP_PEAP_H_ @}*/ diff --git a/src/libcharon/plugins/eap_peap/eap_peap_avp.c b/src/libcharon/plugins/eap_peap/eap_peap_avp.c new file mode 100644 index 000000000..06e5222d9 --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap_avp.c @@ -0,0 +1,152 @@ +/* + * Copyright (C) 2011 Andreas Steffen + * Copyright (C) 2011 HSR 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_peap_avp.h" + +#include <eap/eap.h> +#include <debug.h> + +/** + * Microsoft Success and Failure Result AVPs + */ +static const chunk_t MS_AVP_Success = chunk_from_chars( + 0x80, 0x03, 0x00, 0x02, 0x00, 0x01); +static const chunk_t MS_AVP_Failure = chunk_from_chars( + 0x80, 0x03, 0x00, 0x02, 0x00, 0x02); + +typedef struct private_eap_peap_avp_t private_eap_peap_avp_t; + +/** + * Private data of an eap_peap_avp_t object. + */ +struct private_eap_peap_avp_t { + + /** + * Public eap_peap_avp_t interface. + */ + eap_peap_avp_t public; + + /** + * EAP server or peer + */ + bool is_server; +}; + +METHOD(eap_peap_avp_t, build, void, + private_eap_peap_avp_t *this, tls_writer_t *writer, chunk_t data) +{ + u_int8_t code; + eap_packet_t *pkt; + chunk_t avp_data; + + pkt = (eap_packet_t*)data.ptr; + + if (pkt->code == EAP_SUCCESS || pkt->code == EAP_FAILURE) + { + code = (this->is_server) ? EAP_REQUEST : EAP_RESPONSE; + writer->write_uint8(writer, code); + writer->write_uint8(writer, pkt->identifier); + writer->write_uint16(writer, 11); + writer->write_uint8(writer, EAP_MSTLV); + avp_data = (pkt->code == EAP_SUCCESS) ? MS_AVP_Success : MS_AVP_Failure; + } + else + { + avp_data = chunk_skip(data, 4); + } + writer->write_data(writer, avp_data); +} + +METHOD(eap_peap_avp_t, process, status_t, + private_eap_peap_avp_t* this, tls_reader_t *reader, chunk_t *data, + u_int8_t identifier) +{ + u_int8_t code; + u_int16_t len; + eap_packet_t *pkt; + chunk_t avp_data; + + code = (this->is_server) ? EAP_RESPONSE : EAP_REQUEST; + len = reader->remaining(reader); + if (!reader->read_data(reader, len, &avp_data)) + { + return FAILED; + } + pkt = (eap_packet_t*)avp_data.ptr; + + if (len > 4 && pkt->code == code && untoh16(&pkt->length) == len) + { + if (len == 5 && pkt->type == EAP_IDENTITY) + { + DBG2(DBG_IKE, "uncompressed EAP Identity request"); + *data = chunk_clone(avp_data); + return SUCCESS; + } + else if (len == 11 && pkt->type == EAP_MSTLV) + { + if (memeq(&pkt->data, MS_AVP_Success.ptr, MS_AVP_Success.len)) + { + DBG2(DBG_IKE, "MS Success Result AVP"); + code = EAP_SUCCESS; + } + else if (memeq(&pkt->data, MS_AVP_Failure.ptr, MS_AVP_Failure.len)) + { + DBG2(DBG_IKE, "MS Failure Result AVP"); + code = EAP_FAILURE; + } + else + { + DBG1(DBG_IKE, "unknown MS AVP message"); + return FAILED; + } + identifier = pkt->identifier; + len = 0; + } + } + + *data = chunk_alloc(4 + len); + pkt = (eap_packet_t*)data->ptr; + pkt->code = code; + pkt->identifier = identifier; + htoun16(&pkt->length, data->len); + memcpy(data->ptr + 4, avp_data.ptr, len); + + return SUCCESS; +} + +METHOD(eap_peap_avp_t, destroy, void, + private_eap_peap_avp_t *this) +{ + free(this); +} + +/** + * See header + */ +eap_peap_avp_t *eap_peap_avp_create(bool is_server) +{ + private_eap_peap_avp_t *this; + + INIT(this, + .public= { + .process = _process, + .build = _build, + .destroy = _destroy, + }, + .is_server = is_server, + ); + + return &this->public; +} diff --git a/src/libcharon/plugins/eap_peap/eap_peap_avp.h b/src/libcharon/plugins/eap_peap/eap_peap_avp.h new file mode 100644 index 000000000..db22f0f8f --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap_avp.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2011 Andreas Steffen + * Copyright (C) 2011 HSR 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_peap_avp eap_peap_avp + * @{ @ingroup eap_peap + */ + +#ifndef EAP_PEAP_AVP_H_ +#define EAP_PEAP_AVP_H_ + +typedef struct eap_peap_avp_t eap_peap_avp_t; + +#include <library.h> + +#include <tls_reader.h> +#include <tls_writer.h> + +/** + * EAP-PEAP Attribute-Value Pair (AVP) handler. + */ +struct eap_peap_avp_t { + + /** + * Process received EAP-PEAP Message AVP. + * + * @param reader TLS data buffer + * @param data received EAP Message + * @param identifier EAP-PEAP message identifier + * @return + * - SUCCESS if AVP processing succeeded + * - FAILED if AVP processing failed + * - NEED_MORE if another invocation of process/build needed + */ + status_t (*process)(eap_peap_avp_t *this, tls_reader_t *reader, + chunk_t *data, u_int8_t identifier); + + /** + * Build EAP-PEAP Message AVP to send out. + * + * @param writer TLS data buffer to write to + * @param data EAP Message to send + */ + void (*build)(eap_peap_avp_t *this, tls_writer_t *writer, chunk_t data); + + /** + * Destroy a eap_peap_application_t. + */ + void (*destroy)(eap_peap_avp_t *this); +}; + +/** + * Create an eap_peap_avp instance. + * + * @param is_server TRUE iv eap server, FALSE if eap peer + */ +eap_peap_avp_t *eap_peap_avp_create(bool is_server); + +#endif /** EAP_PEAP_AVP_H_ @}*/ diff --git a/src/libcharon/plugins/eap_peap/eap_peap_peer.c b/src/libcharon/plugins/eap_peap/eap_peap_peer.c new file mode 100644 index 000000000..ca2af4fee --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap_peer.c @@ -0,0 +1,256 @@ +/* + * Copyright (C) 2011 Andreas Steffen + * Copyright (C) 2011 HSR 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_peap_peer.h" +#include "eap_peap_avp.h" + +#include <debug.h> +#include <daemon.h> + +typedef struct private_eap_peap_peer_t private_eap_peap_peer_t; + +/** + * Private data of an eap_peap_peer_t object. + */ +struct private_eap_peap_peer_t { + + /** + * Public eap_peap_peer_t interface. + */ + eap_peap_peer_t public; + + /** + * Server identity + */ + identification_t *server; + + /** + * Peer identity + */ + identification_t *peer; + + /** + * Outer phase 1 EAP method + */ + eap_method_t *ph1_method; + + /** + * Current phase 2 EAP method + */ + eap_method_t *ph2_method; + + /** + * Pending outbound EAP message + */ + eap_payload_t *out; + + /** + * AVP handler + */ + eap_peap_avp_t *avp; +}; + +METHOD(tls_application_t, process, status_t, + private_eap_peap_peer_t *this, tls_reader_t *reader) +{ + chunk_t data = chunk_empty; + status_t status; + payload_t *payload; + eap_payload_t *in; + eap_code_t code; + eap_type_t type, received_type; + u_int32_t vendor, received_vendor; + + status = this->avp->process(this->avp, reader, &data, + this->ph1_method->get_identifier(this->ph1_method)); + switch (status) + { + case SUCCESS: + break; + case NEED_MORE: + return NEED_MORE; + case FAILED: + default: + return FAILED; + } + + in = eap_payload_create_data(data); + DBG3(DBG_IKE, "%B", &data); + chunk_free(&data); + payload = (payload_t*)in; + + if (payload->verify(payload) != SUCCESS) + { + in->destroy(in); + return FAILED; + } + + code = in->get_code(in); + if (code == EAP_REQUEST || code == EAP_RESPONSE) + { + received_type = in->get_type(in, &received_vendor); + DBG1(DBG_IKE, "received tunneled EAP-PEAP AVP [EAP/%N/%N]", + eap_code_short_names, code, + eap_type_short_names, received_type); + if (code != EAP_REQUEST) + { + DBG1(DBG_IKE, "%N expected", eap_code_names, EAP_REQUEST); + in->destroy(in); + return FAILED; + } + } + else + { + DBG1(DBG_IKE, "received tunneled EAP-PEAP AVP [EAP/%N]", + eap_code_short_names, code); + this->out = eap_payload_create_code(code, in->get_identifier(in)); + in->destroy(in); + return NEED_MORE; + } + + /* yet another phase2 authentication? */ + if (this->ph2_method) + { + type = this->ph2_method->get_type(this->ph2_method, &vendor); + + if (type != received_type || vendor != received_vendor) + { + this->ph2_method->destroy(this->ph2_method); + this->ph2_method = NULL; + } + } + + if (this->ph2_method == NULL) + { + if (received_vendor) + { + DBG1(DBG_IKE, "server requested vendor specific EAP method %d-%d " + "(id 0x%02X", received_type, received_vendor, + in->get_identifier(in)); + } + else + { + DBG1(DBG_IKE, "server requested %N authentication (id 0x%02X)", + eap_type_names, received_type, in->get_identifier(in)); + } + this->ph2_method = charon->eap->create_instance(charon->eap, + received_type, received_vendor, + EAP_PEER, this->server, this->peer); + if (!this->ph2_method) + { + DBG1(DBG_IKE, "EAP method not supported"); + this->out = eap_payload_create_nak(in->get_identifier(in)); + in->destroy(in); + return NEED_MORE; + } + type = this->ph2_method->get_type(this->ph2_method, &vendor); + } + + status = this->ph2_method->process(this->ph2_method, in, &this->out); + in->destroy(in); + + switch (status) + { + case SUCCESS: + this->ph2_method->destroy(this->ph2_method); + this->ph2_method = NULL; + /* fall through to NEED_MORE */ + case NEED_MORE: + return NEED_MORE; + case FAILED: + default: + if (vendor) + { + DBG1(DBG_IKE, "vendor specific EAP method %d-%d failed", + type, vendor); + } + else + { + DBG1(DBG_IKE, "%N method failed", eap_type_names, type); + } + return FAILED; + } +} + +METHOD(tls_application_t, build, status_t, + private_eap_peap_peer_t *this, tls_writer_t *writer) +{ + chunk_t data; + eap_code_t code; + eap_type_t type; + u_int32_t vendor; + + if (this->out) + { + code = this->out->get_code(this->out); + type = this->out->get_type(this->out, &vendor); + if (code == EAP_REQUEST || code == EAP_RESPONSE) + { + DBG1(DBG_IKE, "sending tunneled EAP-PEAP AVP [EAP/%N/%N]", + eap_code_short_names, code, eap_type_short_names, type); + } + else + { + DBG1(DBG_IKE, "sending tunneled EAP-PEAP AVP [EAP/%N]", + eap_code_short_names, code); + } + + /* get the raw EAP message data */ + data = this->out->get_data(this->out); + DBG3(DBG_IKE, "%B", &data); + this->avp->build(this->avp, writer, data); + + this->out->destroy(this->out); + this->out = NULL; + } + return INVALID_STATE; +} + +METHOD(tls_application_t, destroy, void, + private_eap_peap_peer_t *this) +{ + this->server->destroy(this->server); + this->peer->destroy(this->peer); + DESTROY_IF(this->ph2_method); + DESTROY_IF(this->out); + this->avp->destroy(this->avp); + free(this); +} + +/** + * See header + */ +eap_peap_peer_t *eap_peap_peer_create(identification_t *server, + identification_t *peer, + eap_method_t *eap_method) +{ + private_eap_peap_peer_t *this; + + INIT(this, + .public = { + .application = { + .process = _process, + .build = _build, + .destroy = _destroy, + }, + }, + .server = server->clone(server), + .peer = peer->clone(peer), + .ph1_method = eap_method, + .avp = eap_peap_avp_create(FALSE), + ); + + return &this->public; +} diff --git a/src/libcharon/plugins/eap_peap/eap_peap_peer.h b/src/libcharon/plugins/eap_peap/eap_peap_peer.h new file mode 100644 index 000000000..a87544209 --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap_peer.h @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2011 Andreas Steffen + * Copyright (C) 2011 HSR 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_peap_peer eap_peap_peer + * @{ @ingroup eap_peap + */ + +#ifndef EAP_PEAP_PEER_H_ +#define EAP_PEAP_PEER_H_ + +typedef struct eap_peap_peer_t eap_peap_peer_t; + +#include "tls_application.h" + +#include <library.h> +#include <sa/authenticators/eap/eap_method.h> + +/** + * TLS application data handler as peer. + */ +struct eap_peap_peer_t { + + /** + * Implements the TLS application data handler. + */ + tls_application_t application; +}; + +/** + * Create an eap_peap_peer instance. + */ +eap_peap_peer_t *eap_peap_peer_create(identification_t *server, + identification_t *peer, + eap_method_t *eap_method); + +#endif /** EAP_PEAP_PEER_H_ @}*/ diff --git a/src/libcharon/plugins/eap_peap/eap_peap_plugin.c b/src/libcharon/plugins/eap_peap/eap_peap_plugin.c new file mode 100644 index 000000000..bac5f2d3e --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap_plugin.c @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2011 Andreas Steffen + * Copyright (C) 2011 HSR 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_peap_plugin.h" + +#include "eap_peap.h" + +#include <daemon.h> + +METHOD(plugin_t, get_name, char*, + eap_peap_plugin_t *this) +{ + return "eap-peap"; +} + +METHOD(plugin_t, destroy, void, + eap_peap_plugin_t *this) +{ + charon->eap->remove_method(charon->eap, + (eap_constructor_t)eap_peap_create_server); + charon->eap->remove_method(charon->eap, + (eap_constructor_t)eap_peap_create_peer); + free(this); +} + +/* + * see header file + */ +plugin_t *eap_peap_plugin_create() +{ + eap_peap_plugin_t *this; + + INIT(this, + .plugin = { + .get_name = _get_name, + .reload = (void*)return_false, + .destroy = _destroy, + }, + ); + + charon->eap->add_method(charon->eap, EAP_PEAP, 0, EAP_SERVER, + (eap_constructor_t)eap_peap_create_server); + charon->eap->add_method(charon->eap, EAP_PEAP, 0, EAP_PEER, + (eap_constructor_t)eap_peap_create_peer); + + return &this->plugin; +} diff --git a/src/libcharon/plugins/eap_peap/eap_peap_plugin.h b/src/libcharon/plugins/eap_peap/eap_peap_plugin.h new file mode 100644 index 000000000..75bb504e1 --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap_plugin.h @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2011 Andreas Steffen + * Copyright (C) 2011 HSR 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_peap eap_peap + * @ingroup cplugins + * + * @defgroup eap_peap_plugin eap_peap_plugin + * @{ @ingroup eap_peap + */ + +#ifndef EAP_PEAP_PLUGIN_H_ +#define EAP_PEAP_PLUGIN_H_ + +#include <plugins/plugin.h> + +typedef struct eap_peap_plugin_t eap_peap_plugin_t; + +/** + * EAP-PEAP plugin + */ +struct eap_peap_plugin_t { + + /** + * implements plugin interface + */ + plugin_t plugin; +}; + +/** + * Create a eap_peap_plugin instance. + */ +plugin_t *eap_peap_plugin_create(); + +#endif /** EAP_PEAP_PLUGIN_H_ @}*/ diff --git a/src/libcharon/plugins/eap_peap/eap_peap_server.c b/src/libcharon/plugins/eap_peap/eap_peap_server.c new file mode 100644 index 000000000..3fabc3575 --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap_server.c @@ -0,0 +1,432 @@ +/* + * Copyright (C) 2011 Andreas Steffen + * Copyright (C) 2011 HSR 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_peap_server.h" +#include "eap_peap_avp.h" + +#include <debug.h> +#include <daemon.h> + +typedef struct private_eap_peap_server_t private_eap_peap_server_t; + +/** + * Private data of an eap_peap_server_t object. + */ +struct private_eap_peap_server_t { + + /** + * Public eap_peap_server_t interface. + */ + eap_peap_server_t public; + + /** + * Server identity + */ + identification_t *server; + + /** + * Peer identity + */ + identification_t *peer; + + /** + * Current EAP-PEAP phase2 state + */ + bool start_phase2; + + /** + * Current EAP-PEAP phase2 TNC state + */ + bool start_phase2_tnc; + + /** + * Starts phase 2 with EAP Identity request + */ + bool start_phase2_id; + + /** + * Final EAP-PEAP phase2 result + */ + eap_code_t phase2_result; + + /** + * Outer phase 1 EAP method + */ + eap_method_t *ph1_method; + + /** + * Current phase 2 EAP method + */ + eap_method_t *ph2_method; + + /** + * Pending outbound EAP message + */ + eap_payload_t *out; + + /** + * AVP handler + */ + eap_peap_avp_t *avp; +}; + +/** + * Start EAP client authentication protocol + */ +static status_t start_phase2_auth(private_eap_peap_server_t *this) +{ + char *eap_type_str; + eap_type_t type; + + eap_type_str = lib->settings->get_str(lib->settings, + "charon.plugins.eap-peap.phase2_method", "mschapv2"); + type = eap_type_from_string(eap_type_str); + if (type == 0) + { + DBG1(DBG_IKE, "unrecognized phase2 method \"%s\"", eap_type_str); + return FAILED; + } + DBG1(DBG_IKE, "phase2 method %N selected", eap_type_names, type); + this->ph2_method = charon->eap->create_instance(charon->eap, type, 0, + EAP_SERVER, this->server, this->peer); + if (this->ph2_method == NULL) + { + DBG1(DBG_IKE, "%N method not available", eap_type_names, type); + return FAILED; + } + + /* synchronize EAP message identifiers of inner protocol with outer */ + this->ph2_method->set_identifier(this->ph2_method, + this->ph1_method->get_identifier(this->ph1_method) + 1); + + if (this->ph2_method->initiate(this->ph2_method, &this->out) == NEED_MORE) + { + return NEED_MORE; + } + else + { + DBG1(DBG_IKE, "%N method failed", eap_type_names, type); + return FAILED; + } +} + +/** + * If configured, start EAP-TNC protocol + */ +static status_t start_phase2_tnc(private_eap_peap_server_t *this) +{ + if (this->start_phase2_tnc && lib->settings->get_bool(lib->settings, + "charon.plugins.eap-peap.phase2_tnc", FALSE)) + { + DBG1(DBG_IKE, "phase2 method %N selected", eap_type_names, EAP_TNC); + this->ph2_method = charon->eap->create_instance(charon->eap, EAP_TNC, + 0, EAP_SERVER, this->server, this->peer); + if (this->ph2_method == NULL) + { + DBG1(DBG_IKE, "%N method not available", eap_type_names, EAP_TNC); + return FAILED; + } + this->start_phase2_tnc = FALSE; + + /* synchronize EAP message identifiers of inner protocol with outer */ + this->ph2_method->set_identifier(this->ph2_method, + this->ph1_method->get_identifier(this->ph1_method) + 1); + + if (this->ph2_method->initiate(this->ph2_method, &this->out) == NEED_MORE) + { + return NEED_MORE; + } + else + { + DBG1(DBG_IKE, "%N method failed", eap_type_names, EAP_TNC); + return FAILED; + } + } + return SUCCESS; +} + +METHOD(tls_application_t, process, status_t, + private_eap_peap_server_t *this, tls_reader_t *reader) +{ + chunk_t data = chunk_empty; + status_t status; + payload_t *payload; + eap_payload_t *in; + eap_code_t code; + eap_type_t type = EAP_NAK, received_type; + u_int32_t vendor, received_vendor; + + status = this->avp->process(this->avp, reader, &data, + this->ph1_method->get_identifier(this->ph1_method)); + switch (status) + { + case SUCCESS: + break; + case NEED_MORE: + return NEED_MORE; + case FAILED: + default: + return FAILED; + } + + in = eap_payload_create_data(data); + DBG3(DBG_IKE, "%B", &data); + chunk_free(&data); + payload = (payload_t*)in; + + if (payload->verify(payload) != SUCCESS) + { + in->destroy(in); + return FAILED; + } + + code = in->get_code(in); + if (code == EAP_REQUEST || code == EAP_RESPONSE) + { + received_type = in->get_type(in, &received_vendor); + DBG1(DBG_IKE, "received tunneled EAP-PEAP AVP [EAP/%N/%N]", + eap_code_short_names, code, + eap_type_short_names, received_type); + if (code != EAP_RESPONSE) + { + DBG1(DBG_IKE, "%N expected", eap_code_names, EAP_RESPONSE); + in->destroy(in); + return FAILED; + } + } + else + { + DBG1(DBG_IKE, "received tunneled EAP-PEAP AVP [EAP/%N]", + eap_code_short_names, code); + + /* if EAP_SUCCESS check if to continue phase2 with EAP-TNC */ + return (this->phase2_result == EAP_SUCCESS && code == EAP_SUCCESS) ? + start_phase2_tnc(this) : FAILED; + } + + if (this->ph2_method) + { + type = this->ph2_method->get_type(this->ph2_method, &vendor); + + if (type != received_type || vendor != received_vendor) + { + if (received_vendor == 0 && received_type == EAP_NAK) + { + DBG1(DBG_IKE, "peer does not support %N", eap_type_names, type); + } + else + { + DBG1(DBG_IKE, "received invalid EAP response"); + } + in->destroy(in); + return FAILED; + } + } + + if (!received_vendor && received_type == EAP_IDENTITY) + { + chunk_t eap_id; + + if (this->ph2_method == NULL) + { + /* Received an EAP Identity response without a matching request */ + this->ph2_method = charon->eap->create_instance(charon->eap, + EAP_IDENTITY, 0, EAP_SERVER, + this->server, this->peer); + if (this->ph2_method == NULL) + { + DBG1(DBG_IKE, "%N method not available", + eap_type_names, EAP_IDENTITY); + return FAILED; + } + } + + if (this->ph2_method->process(this->ph2_method, in, &this->out) != SUCCESS) + { + + DBG1(DBG_IKE, "%N method failed", eap_type_names, EAP_IDENTITY); + return FAILED; + } + + if (this->ph2_method->get_msk(this->ph2_method, &eap_id) == SUCCESS) + { + this->peer->destroy(this->peer); + this->peer = identification_create_from_data(eap_id); + DBG1(DBG_IKE, "received EAP identity '%Y'", this->peer); + } + + in->destroy(in); + this->ph2_method->destroy(this->ph2_method); + this->ph2_method = NULL; + + /* Start Phase 2 of EAP-PEAP authentication */ + if (lib->settings->get_bool(lib->settings, + "charon.plugins.eap-peap.request_peer_auth", FALSE)) + { + return start_phase2_tnc(this); + } + else + { + return start_phase2_auth(this); + } + } + + if (this->ph2_method == 0) + { + DBG1(DBG_IKE, "no %N phase2 method installed", eap_type_names, EAP_PEAP); + in->destroy(in); + return FAILED; + } + + status = this->ph2_method->process(this->ph2_method, in, &this->out); + in->destroy(in); + + switch (status) + { + case SUCCESS: + DBG1(DBG_IKE, "%N phase2 authentication of '%Y' with %N successful", + eap_type_names, EAP_PEAP, this->peer, + eap_type_names, type); + this->ph2_method->destroy(this->ph2_method); + this->ph2_method = NULL; + + /* EAP-PEAP requires the sending of an inner EAP_SUCCESS message */ + this->phase2_result = EAP_SUCCESS; + this->out = eap_payload_create_code(this->phase2_result, 1 + + this->ph1_method->get_identifier(this->ph1_method)); + return NEED_MORE; + case NEED_MORE: + break; + case FAILED: + default: + if (vendor) + { + DBG1(DBG_IKE, "vendor specific EAP method %d-%d failed", + type, vendor); + } + else + { + DBG1(DBG_IKE, "%N method failed", eap_type_names, type); + } + /* EAP-PEAP requires the sending of an inner EAP_FAILURE message */ + this->phase2_result = EAP_FAILURE; + this->out = eap_payload_create_code(this->phase2_result, 1 + + this->ph1_method->get_identifier(this->ph1_method)); + return NEED_MORE; + } + return status; +} + +METHOD(tls_application_t, build, status_t, + private_eap_peap_server_t *this, tls_writer_t *writer) +{ + chunk_t data; + eap_code_t code; + eap_type_t type; + u_int32_t vendor; + + if (this->ph2_method == NULL && this->start_phase2 && this->start_phase2_id) + { + /* + * Start Phase 2 with an EAP Identity request either piggybacked right + * onto the TLS Finished payload or delayed after the reception of an + * empty EAP Acknowledge message. + */ + this->ph2_method = charon->eap->create_instance(charon->eap, EAP_IDENTITY, + 0, EAP_SERVER, this->server, this->peer); + if (this->ph2_method == NULL) + { + DBG1(DBG_IKE, "%N method not available", + eap_type_names, EAP_IDENTITY); + return FAILED; + } + + /* synchronize EAP message identifiers of inner protocol with outer */ + this->ph2_method->set_identifier(this->ph2_method, + this->ph1_method->get_identifier(this->ph1_method)); + + this->ph2_method->initiate(this->ph2_method, &this->out); + this->start_phase2 = FALSE; + } + + this->start_phase2_id = TRUE; + + if (this->out) + { + code = this->out->get_code(this->out); + type = this->out->get_type(this->out, &vendor); + if (code == EAP_REQUEST || code == EAP_RESPONSE) + { + DBG1(DBG_IKE, "sending tunneled EAP-PEAP AVP [EAP/%N/%N]", + eap_code_short_names, code, eap_type_short_names, type); + } + else + { + DBG1(DBG_IKE, "sending tunneled EAP-PEAP AVP [EAP/%N]", + eap_code_short_names, code); + } + + /* get the raw EAP message data */ + data = this->out->get_data(this->out); + DBG3(DBG_IKE, "%B", &data); + this->avp->build(this->avp, writer, data); + + this->out->destroy(this->out); + this->out = NULL; + } + return INVALID_STATE; +} + +METHOD(tls_application_t, destroy, void, + private_eap_peap_server_t *this) +{ + this->server->destroy(this->server); + this->peer->destroy(this->peer); + DESTROY_IF(this->ph2_method); + DESTROY_IF(this->out); + this->avp->destroy(this->avp); + free(this); +} + +/** + * See header + */ +eap_peap_server_t *eap_peap_server_create(identification_t *server, + identification_t *peer, + eap_method_t *eap_method) +{ + private_eap_peap_server_t *this; + + INIT(this, + .public = { + .application = { + .process = _process, + .build = _build, + .destroy = _destroy, + }, + }, + .server = server->clone(server), + .peer = peer->clone(peer), + .ph1_method = eap_method, + .start_phase2 = TRUE, + .start_phase2_tnc = TRUE, + .start_phase2_id = lib->settings->get_bool(lib->settings, + "charon.plugins.eap-peap.phase2_piggyback", FALSE), + .phase2_result = EAP_FAILURE, + .avp = eap_peap_avp_create(TRUE), + ); + + return &this->public; +} diff --git a/src/libcharon/plugins/eap_peap/eap_peap_server.h b/src/libcharon/plugins/eap_peap/eap_peap_server.h new file mode 100644 index 000000000..93141d62b --- /dev/null +++ b/src/libcharon/plugins/eap_peap/eap_peap_server.h @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2011 Andreas Steffen + * Copyright (C) 2011 HSR 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_peap_server eap_peap_server + * @{ @ingroup eap_peap + */ + +#ifndef EAP_PEAP_SERVER_H_ +#define EAP_PEAP_SERVER_H_ + +typedef struct eap_peap_server_t eap_peap_server_t; + +#include "tls_application.h" + +#include <library.h> +#include <sa/authenticators/eap/eap_method.h> + +/** + * TLS application data handler as server. + */ +struct eap_peap_server_t { + + /** + * Implements the TLS application data handler. + */ + tls_application_t application; +}; + +/** + * Create an eap_peap_server instance. + */ +eap_peap_server_t *eap_peap_server_create(identification_t *server, + identification_t *peer, + eap_method_t *eap_method); + +#endif /** EAP_PEAP_SERVER_H_ @}*/ |