Annotation of embedaddon/strongswan/src/libcharon/plugins/eap_peap/eap_peap_avp.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (C) 2011 Andreas Steffen
3: * HSR Hochschule fuer Technik Rapperswil
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_peap_avp.h"
17:
18: #include <eap/eap.h>
19: #include <utils/debug.h>
20:
21: /**
22: * Microsoft Success and Failure Result AVPs
23: */
24: static const chunk_t MS_AVP_Success = chunk_from_chars(
25: 0x80, 0x03, 0x00, 0x02, 0x00, 0x01);
26: static const chunk_t MS_AVP_Failure = chunk_from_chars(
27: 0x80, 0x03, 0x00, 0x02, 0x00, 0x02);
28:
29: typedef struct private_eap_peap_avp_t private_eap_peap_avp_t;
30:
31: /**
32: * Private data of an eap_peap_avp_t object.
33: */
34: struct private_eap_peap_avp_t {
35:
36: /**
37: * Public eap_peap_avp_t interface.
38: */
39: eap_peap_avp_t public;
40:
41: /**
42: * EAP server or peer
43: */
44: bool is_server;
45: };
46:
47: METHOD(eap_peap_avp_t, build, void,
48: private_eap_peap_avp_t *this, bio_writer_t *writer, chunk_t data)
49: {
50: uint8_t code;
51: eap_packet_t *pkt;
52: chunk_t avp_data;
53:
54: pkt = (eap_packet_t*)data.ptr;
55:
56: if (pkt->code == EAP_SUCCESS || pkt->code == EAP_FAILURE)
57: {
58: code = (this->is_server) ? EAP_REQUEST : EAP_RESPONSE;
59: writer->write_uint8(writer, code);
60: writer->write_uint8(writer, pkt->identifier);
61: writer->write_uint16(writer, 11);
62: writer->write_uint8(writer, EAP_MSTLV);
63: avp_data = (pkt->code == EAP_SUCCESS) ? MS_AVP_Success : MS_AVP_Failure;
64: }
65: else
66: {
67: avp_data = chunk_skip(data, 4);
68: }
69: writer->write_data(writer, avp_data);
70: }
71:
72: METHOD(eap_peap_avp_t, process, status_t,
73: private_eap_peap_avp_t* this, bio_reader_t *reader, chunk_t *data,
74: uint8_t identifier)
75: {
76: uint8_t code;
77: uint16_t len;
78: eap_packet_t *pkt;
79: chunk_t avp_data;
80:
81: code = (this->is_server) ? EAP_RESPONSE : EAP_REQUEST;
82: len = reader->remaining(reader);
83: if (!reader->read_data(reader, len, &avp_data))
84: {
85: return FAILED;
86: }
87: pkt = (eap_packet_t*)avp_data.ptr;
88:
89: if (len > 4 && pkt->code == code && untoh16(&pkt->length) == len)
90: {
91: if (len == 5 && pkt->type == EAP_IDENTITY)
92: {
93: DBG2(DBG_IKE, "uncompressed EAP Identity request");
94: *data = chunk_clone(avp_data);
95: return SUCCESS;
96: }
97: else if (len == 11 && pkt->type == EAP_MSTLV)
98: {
99: if (memeq(&pkt->data, MS_AVP_Success.ptr, MS_AVP_Success.len))
100: {
101: DBG2(DBG_IKE, "MS Success Result AVP");
102: code = EAP_SUCCESS;
103: }
104: else if (memeq(&pkt->data, MS_AVP_Failure.ptr, MS_AVP_Failure.len))
105: {
106: DBG2(DBG_IKE, "MS Failure Result AVP");
107: code = EAP_FAILURE;
108: }
109: else
110: {
111: DBG1(DBG_IKE, "unknown MS AVP message");
112: return FAILED;
113: }
114: identifier = pkt->identifier;
115: len = 0;
116: }
117: }
118:
119: *data = chunk_alloc(4 + len);
120: pkt = (eap_packet_t*)data->ptr;
121: pkt->code = code;
122: pkt->identifier = identifier;
123: htoun16(&pkt->length, data->len);
124: memcpy(data->ptr + 4, avp_data.ptr, len);
125:
126: return SUCCESS;
127: }
128:
129: METHOD(eap_peap_avp_t, destroy, void,
130: private_eap_peap_avp_t *this)
131: {
132: free(this);
133: }
134:
135: /**
136: * See header
137: */
138: eap_peap_avp_t *eap_peap_avp_create(bool is_server)
139: {
140: private_eap_peap_avp_t *this;
141:
142: INIT(this,
143: .public= {
144: .process = _process,
145: .build = _build,
146: .destroy = _destroy,
147: },
148: .is_server = is_server,
149: );
150:
151: return &this->public;
152: }
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