226 lines
4.7 KiB
C
226 lines
4.7 KiB
C
/*
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* Copyright (C) 2007-2008 Martin Willi
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "eap_identity.h"
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#include <daemon.h>
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#include <library.h>
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typedef struct private_eap_identity_t private_eap_identity_t;
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/**
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* Private data of an eap_identity_t object.
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*/
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struct private_eap_identity_t {
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/**
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* Public authenticator_t interface.
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*/
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eap_identity_t public;
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/**
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* ID of the peer
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*/
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identification_t *peer;
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/**
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* received identity chunk
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*/
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chunk_t identity;
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/**
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* EAP identifier
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*/
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uint8_t identifier;
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};
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typedef struct eap_identity_header_t eap_identity_header_t;
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/**
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* packed EAP Identity header struct
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*/
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struct eap_identity_header_t {
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/** EAP code (REQUEST/RESPONSE) */
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uint8_t code;
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/** unique message identifier */
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uint8_t identifier;
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/** length of whole message */
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uint16_t length;
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/** EAP type */
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uint8_t type;
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/** identity data */
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uint8_t data[];
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} __attribute__((__packed__));
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METHOD(eap_method_t, process_peer, status_t,
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private_eap_identity_t *this, eap_payload_t *in, eap_payload_t **out)
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{
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chunk_t id;
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eap_identity_header_t *hdr;
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size_t len;
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id = this->peer->get_encoding(this->peer);
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len = sizeof(eap_identity_header_t) + id.len;
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if (in)
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{
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this->identifier = in->get_identifier(in);
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}
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hdr = alloca(len);
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hdr->code = EAP_RESPONSE;
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hdr->identifier = this->identifier;
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hdr->length = htons(len);
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hdr->type = EAP_IDENTITY;
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memcpy(hdr->data, id.ptr, id.len);
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*out = eap_payload_create_data(chunk_create((u_char*)hdr, len));
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return SUCCESS;
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}
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METHOD(eap_method_t, initiate_peer, status_t,
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private_eap_identity_t *this, eap_payload_t **out)
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{
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/* peer never initiates */
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return FAILED;
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}
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METHOD(eap_method_t, process_server, status_t,
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private_eap_identity_t *this, eap_payload_t *in, eap_payload_t **out)
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{
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chunk_t data;
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data = chunk_skip(in->get_data(in), 5);
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if (data.len)
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{
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this->identity = chunk_clone(data);
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}
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return SUCCESS;
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}
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METHOD(eap_method_t, initiate_server, status_t,
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private_eap_identity_t *this, eap_payload_t **out)
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{
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eap_identity_header_t hdr;
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hdr.code = EAP_REQUEST;
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hdr.identifier = this->identifier;
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hdr.length = htons(sizeof(eap_identity_header_t));
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hdr.type = EAP_IDENTITY;
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*out = eap_payload_create_data(chunk_create((u_char*)&hdr,
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sizeof(eap_identity_header_t)));
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return NEED_MORE;
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}
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METHOD(eap_method_t, get_type, eap_type_t,
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private_eap_identity_t *this, uint32_t *vendor)
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{
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*vendor = 0;
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return EAP_IDENTITY;
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}
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METHOD(eap_method_t, get_msk, status_t,
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private_eap_identity_t *this, chunk_t *msk)
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{
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if (this->identity.ptr)
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{
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*msk = this->identity;
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return SUCCESS;
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}
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return FAILED;
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}
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METHOD(eap_method_t, get_identifier, uint8_t,
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private_eap_identity_t *this)
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{
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return this->identifier;
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}
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METHOD(eap_method_t, set_identifier, void,
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private_eap_identity_t *this, uint8_t identifier)
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{
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this->identifier = identifier;
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}
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METHOD(eap_method_t, is_mutual, bool,
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private_eap_identity_t *this)
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{
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return FALSE;
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}
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METHOD(eap_method_t, destroy, void,
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private_eap_identity_t *this)
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{
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this->peer->destroy(this->peer);
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free(this->identity.ptr);
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free(this);
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}
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/*
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* Described in header.
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*/
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eap_identity_t *eap_identity_create_peer(identification_t *server,
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identification_t *peer)
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{
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private_eap_identity_t *this;
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INIT(this,
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.public = {
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.eap_method = {
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.initiate = _initiate_peer,
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.process = _process_peer,
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.get_type = _get_type,
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.is_mutual = _is_mutual,
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.get_msk = _get_msk,
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.get_identifier = _get_identifier,
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.set_identifier = _set_identifier,
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.destroy = _destroy,
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},
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},
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.peer = peer->clone(peer),
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.identity = chunk_empty,
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);
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return &this->public;
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}
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/*
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* Described in header.
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*/
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eap_identity_t *eap_identity_create_server(identification_t *server,
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identification_t *peer)
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{
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private_eap_identity_t *this;
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INIT(this,
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.public = {
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.eap_method = {
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.initiate = _initiate_server,
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.process = _process_server,
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.get_type = _get_type,
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.is_mutual = _is_mutual,
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.get_msk = _get_msk,
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.get_identifier = _get_identifier,
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.set_identifier = _set_identifier,
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.destroy = _destroy,
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},
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},
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.peer = peer->clone(peer),
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.identity = chunk_empty,
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);
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return &this->public;
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}
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