1 /*
2 * hostapd / RADIUS message processing
3 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #ifndef RADIUS_H
16 #define RADIUS_H
17
18 /* RFC 2865 - RADIUS */
19
20 #ifdef _MSC_VER
21 #pragma pack(push, 1)
22 #endif /* _MSC_VER */
23
24 struct radius_hdr {
25 u8 code;
26 u8 identifier;
27 u16 length; /* including this header */
28 u8 authenticator[16];
29 /* followed by length-20 octets of attributes */
30 } STRUCT_PACKED;
31
32 enum { RADIUS_CODE_ACCESS_REQUEST = 1,
33 RADIUS_CODE_ACCESS_ACCEPT = 2,
34 RADIUS_CODE_ACCESS_REJECT = 3,
35 RADIUS_CODE_ACCOUNTING_REQUEST = 4,
36 RADIUS_CODE_ACCOUNTING_RESPONSE = 5,
37 RADIUS_CODE_ACCESS_CHALLENGE = 11,
38 RADIUS_CODE_STATUS_SERVER = 12,
39 RADIUS_CODE_STATUS_CLIENT = 13,
40 RADIUS_CODE_RESERVED = 255
41 };
42
43 struct radius_attr_hdr {
44 u8 type;
45 u8 length; /* including this header */
46 /* followed by length-2 octets of attribute value */
47 } STRUCT_PACKED;
48
49 #define RADIUS_MAX_ATTR_LEN (255 - sizeof(struct radius_attr_hdr))
50
51 enum { RADIUS_ATTR_USER_NAME = 1,
52 RADIUS_ATTR_USER_PASSWORD = 2,
53 RADIUS_ATTR_NAS_IP_ADDRESS = 4,
54 RADIUS_ATTR_NAS_PORT = 5,
55 RADIUS_ATTR_FRAMED_MTU = 12,
56 RADIUS_ATTR_STATE = 24,
57 RADIUS_ATTR_CLASS = 25,
58 RADIUS_ATTR_VENDOR_SPECIFIC = 26,
59 RADIUS_ATTR_SESSION_TIMEOUT = 27,
60 RADIUS_ATTR_IDLE_TIMEOUT = 28,
61 RADIUS_ATTR_TERMINATION_ACTION = 29,
62 RADIUS_ATTR_CALLED_STATION_ID = 30,
63 RADIUS_ATTR_CALLING_STATION_ID = 31,
64 RADIUS_ATTR_NAS_IDENTIFIER = 32,
65 RADIUS_ATTR_PROXY_STATE = 33,
66 RADIUS_ATTR_ACCT_STATUS_TYPE = 40,
67 RADIUS_ATTR_ACCT_DELAY_TIME = 41,
68 RADIUS_ATTR_ACCT_INPUT_OCTETS = 42,
69 RADIUS_ATTR_ACCT_OUTPUT_OCTETS = 43,
70 RADIUS_ATTR_ACCT_SESSION_ID = 44,
71 RADIUS_ATTR_ACCT_AUTHENTIC = 45,
72 RADIUS_ATTR_ACCT_SESSION_TIME = 46,
73 RADIUS_ATTR_ACCT_INPUT_PACKETS = 47,
74 RADIUS_ATTR_ACCT_OUTPUT_PACKETS = 48,
75 RADIUS_ATTR_ACCT_TERMINATE_CAUSE = 49,
76 RADIUS_ATTR_ACCT_MULTI_SESSION_ID = 50,
77 RADIUS_ATTR_ACCT_LINK_COUNT = 51,
78 RADIUS_ATTR_ACCT_INPUT_GIGAWORDS = 52,
79 RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS = 53,
80 RADIUS_ATTR_EVENT_TIMESTAMP = 55,
81 RADIUS_ATTR_NAS_PORT_TYPE = 61,
82 RADIUS_ATTR_TUNNEL_TYPE = 64,
83 RADIUS_ATTR_TUNNEL_MEDIUM_TYPE = 65,
84 RADIUS_ATTR_CONNECT_INFO = 77,
85 RADIUS_ATTR_EAP_MESSAGE = 79,
86 RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80,
87 RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID = 81,
88 RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85,
89 RADIUS_ATTR_NAS_IPV6_ADDRESS = 95
90 };
91
92
93 /* Termination-Action */
94 #define RADIUS_TERMINATION_ACTION_DEFAULT 0
95 #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
96
97 /* NAS-Port-Type */
98 #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
99
100 /* Acct-Status-Type */
101 #define RADIUS_ACCT_STATUS_TYPE_START 1
102 #define RADIUS_ACCT_STATUS_TYPE_STOP 2
103 #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
104 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
105 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
106
107 /* Acct-Authentic */
108 #define RADIUS_ACCT_AUTHENTIC_RADIUS 1
109 #define RADIUS_ACCT_AUTHENTIC_LOCAL 2
110 #define RADIUS_ACCT_AUTHENTIC_REMOTE 3
111
112 /* Acct-Terminate-Cause */
113 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
114 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
115 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
116 #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
117 #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
118 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
119 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
120 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
121 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
122 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
123 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
124 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
125 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
126 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
127 #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
128 #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
129 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
130 #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
131
132 #define RADIUS_TUNNEL_TAGS 32
133
134 /* Tunnel-Type */
135 #define RADIUS_TUNNEL_TYPE_PPTP 1
136 #define RADIUS_TUNNEL_TYPE_L2TP 3
137 #define RADIUS_TUNNEL_TYPE_IPIP 7
138 #define RADIUS_TUNNEL_TYPE_GRE 10
139 #define RADIUS_TUNNEL_TYPE_VLAN 13
140
141 /* Tunnel-Medium-Type */
142 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
143 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
144 #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
145
146
147 struct radius_attr_vendor {
148 u8 vendor_type;
149 u8 vendor_length;
150 } STRUCT_PACKED;
151
152 #define RADIUS_VENDOR_ID_CISCO 9
153 #define RADIUS_CISCO_AV_PAIR 1
154
155 /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
156 #define RADIUS_VENDOR_ID_MICROSOFT 311
157
158 enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
159 RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
160 };
161
162 #ifdef _MSC_VER
163 #pragma pack(pop)
164 #endif /* _MSC_VER */
165
166 struct radius_ms_mppe_keys {
167 u8 *send;
168 size_t send_len;
169 u8 *recv;
170 size_t recv_len;
171 };
172
173
174 /* RADIUS message structure for new and parsed messages */
175 struct radius_msg {
176 unsigned char *buf;
177 size_t buf_size; /* total size allocated for buf */
178 size_t buf_used; /* bytes used in buf */
179
180 struct radius_hdr *hdr;
181
182 struct radius_attr_hdr **attrs; /* array of pointers to attributes */
183 size_t attr_size; /* total size of the attribute pointer array */
184 size_t attr_used; /* total number of attributes in the array */
185 };
186
187
188 /* Default size to be allocated for new RADIUS messages */
189 #define RADIUS_DEFAULT_MSG_SIZE 1024
190
191 /* Default size to be allocated for attribute array */
192 #define RADIUS_DEFAULT_ATTR_COUNT 16
193
194
195 /* MAC address ASCII format for IEEE 802.1X use
196 * (draft-congdon-radius-8021x-20.txt) */
197 #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
198 /* MAC address ASCII format for non-802.1X use */
199 #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
200
201 struct radius_msg *radius_msg_new(u8 code, u8 identifier);
202 int radius_msg_initialize(struct radius_msg *msg, size_t init_len);
203 void radius_msg_set_hdr(struct radius_msg *msg, u8 code, u8 identifier);
204 void radius_msg_free(struct radius_msg *msg);
205 void radius_msg_dump(struct radius_msg *msg);
206 int radius_msg_finish(struct radius_msg *msg, u8 *secret, size_t secret_len);
207 int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
208 size_t secret_len, const u8 *req_authenticator);
209 void radius_msg_finish_acct(struct radius_msg *msg, u8 *secret,
210 size_t secret_len);
211 struct radius_attr_hdr *radius_msg_add_attr(struct radius_msg *msg, u8 type,
212 const u8 *data, size_t data_len);
213 struct radius_msg *radius_msg_parse(const u8 *data, size_t len);
214 int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
215 size_t data_len);
216 u8 *radius_msg_get_eap(struct radius_msg *msg, size_t *len);
217 int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
218 size_t secret_len, struct radius_msg *sent_msg,
219 int auth);
220 int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
221 size_t secret_len, const u8 *req_auth);
222 int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
223 u8 type);
224 void radius_msg_make_authenticator(struct radius_msg *msg,
225 const u8 *data, size_t len);
226 struct radius_ms_mppe_keys *
227 radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
228 u8 *secret, size_t secret_len);
229 struct radius_ms_mppe_keys *
230 radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
231 u8 *secret, size_t secret_len);
232 int radius_msg_add_mppe_keys(struct radius_msg *msg,
233 const u8 *req_authenticator,
234 const u8 *secret, size_t secret_len,
235 const u8 *send_key, size_t send_key_len,
236 const u8 *recv_key, size_t recv_key_len);
237 struct radius_attr_hdr *
238 radius_msg_add_attr_user_password(struct radius_msg *msg,
239 u8 *data, size_t data_len,
240 u8 *secret, size_t secret_len);
241 int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
242 int radius_msg_get_vlanid(struct radius_msg *msg);
243
radius_msg_add_attr_int32(struct radius_msg * msg,u8 type,u32 value)244 static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
245 u32 value)
246 {
247 u32 val = htonl(value);
248 return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
249 }
250
radius_msg_get_attr_int32(struct radius_msg * msg,u8 type,u32 * value)251 static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
252 u32 *value)
253 {
254 u32 val;
255 int res;
256 res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
257 if (res != 4)
258 return -1;
259
260 *value = ntohl(val);
261 return 0;
262 }
263 int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
264 size_t *len, const u8 *start);
265 int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
266
267 #endif /* RADIUS_H */
268