Annotation of embedaddon/strongswan/src/libcharon/plugins/eap_tls/eap_tls.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2010 Martin Willi
! 3: * Copyright (C) 2010 revosec AG
! 4: *
! 5: * This program is free software; you can redistribute it and/or modify it
! 6: * under the terms of the GNU General Public License as published by the
! 7: * Free Software Foundation; either version 2 of the License, or (at your
! 8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 9: *
! 10: * This program is distributed in the hope that it will be useful, but
! 11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 13: * for more details.
! 14: */
! 15:
! 16: #include "eap_tls.h"
! 17:
! 18: #include <tls_eap.h>
! 19:
! 20: #include <daemon.h>
! 21: #include <library.h>
! 22:
! 23: typedef struct private_eap_tls_t private_eap_tls_t;
! 24:
! 25: /**
! 26: * Private data of an eap_tls_t object.
! 27: */
! 28: struct private_eap_tls_t {
! 29:
! 30: /**
! 31: * Public interface.
! 32: */
! 33: eap_tls_t public;
! 34:
! 35: /**
! 36: * TLS stack, wrapped by EAP helper
! 37: */
! 38: tls_eap_t *tls_eap;
! 39: };
! 40:
! 41: /** Maximum number of EAP-TLS messages/fragments allowed */
! 42: #define MAX_MESSAGE_COUNT 32
! 43: /** Default size of a EAP-TLS fragment */
! 44: #define MAX_FRAGMENT_LEN 1024
! 45:
! 46: METHOD(eap_method_t, initiate, status_t,
! 47: private_eap_tls_t *this, eap_payload_t **out)
! 48: {
! 49: chunk_t data;
! 50:
! 51: if (this->tls_eap->initiate(this->tls_eap, &data) == NEED_MORE)
! 52: {
! 53: *out = eap_payload_create_data(data);
! 54: free(data.ptr);
! 55: return NEED_MORE;
! 56: }
! 57: return FAILED;
! 58: }
! 59:
! 60: METHOD(eap_method_t, process, status_t,
! 61: private_eap_tls_t *this, eap_payload_t *in, eap_payload_t **out)
! 62: {
! 63: status_t status;
! 64: chunk_t data;
! 65:
! 66: data = in->get_data(in);
! 67: status = this->tls_eap->process(this->tls_eap, data, &data);
! 68: if (status == NEED_MORE)
! 69: {
! 70: *out = eap_payload_create_data(data);
! 71: free(data.ptr);
! 72: }
! 73: return status;
! 74: }
! 75:
! 76: METHOD(eap_method_t, get_type, eap_type_t,
! 77: private_eap_tls_t *this, uint32_t *vendor)
! 78: {
! 79: *vendor = 0;
! 80: return EAP_TLS;
! 81: }
! 82:
! 83: METHOD(eap_method_t, get_msk, status_t,
! 84: private_eap_tls_t *this, chunk_t *msk)
! 85: {
! 86: *msk = this->tls_eap->get_msk(this->tls_eap);
! 87: if (msk->len)
! 88: {
! 89: return SUCCESS;
! 90: }
! 91: return FAILED;
! 92: }
! 93:
! 94: METHOD(eap_method_t, get_identifier, uint8_t,
! 95: private_eap_tls_t *this)
! 96: {
! 97: return this->tls_eap->get_identifier(this->tls_eap);
! 98: }
! 99:
! 100: METHOD(eap_method_t, set_identifier, void,
! 101: private_eap_tls_t *this, uint8_t identifier)
! 102: {
! 103: this->tls_eap->set_identifier(this->tls_eap, identifier);
! 104: }
! 105:
! 106: METHOD(eap_method_t, is_mutual, bool,
! 107: private_eap_tls_t *this)
! 108: {
! 109: return TRUE;
! 110: }
! 111:
! 112: METHOD(eap_method_t, get_auth, auth_cfg_t*,
! 113: private_eap_tls_t *this)
! 114: {
! 115: return this->tls_eap->get_auth(this->tls_eap);
! 116: }
! 117:
! 118: METHOD(eap_method_t, destroy, void,
! 119: private_eap_tls_t *this)
! 120: {
! 121: this->tls_eap->destroy(this->tls_eap);
! 122: free(this);
! 123: }
! 124:
! 125: /**
! 126: * Generic private constructor
! 127: */
! 128: static eap_tls_t *eap_tls_create(identification_t *server,
! 129: identification_t *peer, bool is_server)
! 130: {
! 131: private_eap_tls_t *this;
! 132: size_t frag_size;
! 133: int max_msg_count;
! 134: bool include_length;
! 135: tls_t *tls;
! 136:
! 137: INIT(this,
! 138: .public = {
! 139: .eap_method = {
! 140: .initiate = _initiate,
! 141: .process = _process,
! 142: .get_type = _get_type,
! 143: .is_mutual = _is_mutual,
! 144: .get_msk = _get_msk,
! 145: .get_identifier = _get_identifier,
! 146: .set_identifier = _set_identifier,
! 147: .get_auth = _get_auth,
! 148: .destroy = _destroy,
! 149: },
! 150: },
! 151: );
! 152:
! 153: frag_size = lib->settings->get_int(lib->settings,
! 154: "%s.plugins.eap-tls.fragment_size", MAX_FRAGMENT_LEN,
! 155: lib->ns);
! 156: max_msg_count = lib->settings->get_int(lib->settings,
! 157: "%s.plugins.eap-tls.max_message_count", MAX_MESSAGE_COUNT,
! 158: lib->ns);
! 159: include_length = lib->settings->get_bool(lib->settings,
! 160: "%s.plugins.eap-tls.include_length", TRUE, lib->ns);
! 161: tls = tls_create(is_server, server, peer, TLS_PURPOSE_EAP_TLS, NULL, NULL);
! 162: this->tls_eap = tls_eap_create(EAP_TLS, tls, frag_size, max_msg_count,
! 163: include_length);
! 164: if (!this->tls_eap)
! 165: {
! 166: free(this);
! 167: return NULL;
! 168: }
! 169: return &this->public;
! 170: }
! 171:
! 172: eap_tls_t *eap_tls_create_server(identification_t *server,
! 173: identification_t *peer)
! 174: {
! 175: return eap_tls_create(server, peer, TRUE);
! 176: }
! 177:
! 178: eap_tls_t *eap_tls_create_peer(identification_t *server,
! 179: identification_t *peer)
! 180: {
! 181: return eap_tls_create(server, peer, FALSE);
! 182: }
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