1 /*
2 * RADIUS message processing
3 * Copyright (c) 2002-2009, 2012, 2014-2022, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #ifndef RADIUS_H
10 #define RADIUS_H
11
12 /* RFC 2865 - RADIUS */
13
14 #ifdef _MSC_VER
15 #pragma pack(push, 1)
16 #endif /* _MSC_VER */
17
18 struct radius_hdr {
19 u8 code;
20 u8 identifier;
21 be16 length; /* including this header */
22 u8 authenticator[16];
23 /* followed by length-20 octets of attributes */
24 } STRUCT_PACKED;
25
26 enum { RADIUS_CODE_ACCESS_REQUEST = 1,
27 RADIUS_CODE_ACCESS_ACCEPT = 2,
28 RADIUS_CODE_ACCESS_REJECT = 3,
29 RADIUS_CODE_ACCOUNTING_REQUEST = 4,
30 RADIUS_CODE_ACCOUNTING_RESPONSE = 5,
31 RADIUS_CODE_ACCESS_CHALLENGE = 11,
32 RADIUS_CODE_STATUS_SERVER = 12,
33 RADIUS_CODE_STATUS_CLIENT = 13,
34 RADIUS_CODE_DISCONNECT_REQUEST = 40,
35 RADIUS_CODE_DISCONNECT_ACK = 41,
36 RADIUS_CODE_DISCONNECT_NAK = 42,
37 RADIUS_CODE_COA_REQUEST = 43,
38 RADIUS_CODE_COA_ACK = 44,
39 RADIUS_CODE_COA_NAK = 45,
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 struct radius_attr_hdr_ext {
50 u8 type;
51 u8 length; /* including this header */
52 u8 ext_type;
53 /* followed by length-3 octets of attribute value */
54 } STRUCT_PACKED;
55
56 #define RADIUS_MAX_ATTR_LEN (255 - sizeof(struct radius_attr_hdr))
57 #define RADIUS_MAX_EXT_ATTR_LEN (255 - sizeof(struct radius_attr_hdr_ext))
58
59 enum { RADIUS_ATTR_USER_NAME = 1,
60 RADIUS_ATTR_USER_PASSWORD = 2,
61 RADIUS_ATTR_NAS_IP_ADDRESS = 4,
62 RADIUS_ATTR_NAS_PORT = 5,
63 RADIUS_ATTR_SERVICE_TYPE = 6,
64 RADIUS_ATTR_FRAMED_IP_ADDRESS = 8,
65 RADIUS_ATTR_FILTER_ID = 11,
66 RADIUS_ATTR_FRAMED_MTU = 12,
67 RADIUS_ATTR_REPLY_MESSAGE = 18,
68 RADIUS_ATTR_STATE = 24,
69 RADIUS_ATTR_CLASS = 25,
70 RADIUS_ATTR_VENDOR_SPECIFIC = 26,
71 RADIUS_ATTR_SESSION_TIMEOUT = 27,
72 RADIUS_ATTR_IDLE_TIMEOUT = 28,
73 RADIUS_ATTR_TERMINATION_ACTION = 29,
74 RADIUS_ATTR_CALLED_STATION_ID = 30,
75 RADIUS_ATTR_CALLING_STATION_ID = 31,
76 RADIUS_ATTR_NAS_IDENTIFIER = 32,
77 RADIUS_ATTR_PROXY_STATE = 33,
78 RADIUS_ATTR_ACCT_STATUS_TYPE = 40,
79 RADIUS_ATTR_ACCT_DELAY_TIME = 41,
80 RADIUS_ATTR_ACCT_INPUT_OCTETS = 42,
81 RADIUS_ATTR_ACCT_OUTPUT_OCTETS = 43,
82 RADIUS_ATTR_ACCT_SESSION_ID = 44,
83 RADIUS_ATTR_ACCT_AUTHENTIC = 45,
84 RADIUS_ATTR_ACCT_SESSION_TIME = 46,
85 RADIUS_ATTR_ACCT_INPUT_PACKETS = 47,
86 RADIUS_ATTR_ACCT_OUTPUT_PACKETS = 48,
87 RADIUS_ATTR_ACCT_TERMINATE_CAUSE = 49,
88 RADIUS_ATTR_ACCT_MULTI_SESSION_ID = 50,
89 RADIUS_ATTR_ACCT_LINK_COUNT = 51,
90 RADIUS_ATTR_ACCT_INPUT_GIGAWORDS = 52,
91 RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS = 53,
92 RADIUS_ATTR_EVENT_TIMESTAMP = 55,
93 RADIUS_ATTR_EGRESS_VLANID = 56,
94 RADIUS_ATTR_NAS_PORT_TYPE = 61,
95 RADIUS_ATTR_TUNNEL_TYPE = 64,
96 RADIUS_ATTR_TUNNEL_MEDIUM_TYPE = 65,
97 RADIUS_ATTR_TUNNEL_PASSWORD = 69,
98 RADIUS_ATTR_CONNECT_INFO = 77,
99 RADIUS_ATTR_EAP_MESSAGE = 79,
100 RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80,
101 RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID = 81,
102 RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85,
103 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY = 89,
104 RADIUS_ATTR_NAS_IPV6_ADDRESS = 95,
105 RADIUS_ATTR_ERROR_CAUSE = 101,
106 RADIUS_ATTR_EAP_KEY_NAME = 102,
107 RADIUS_ATTR_OPERATOR_NAME = 126,
108 RADIUS_ATTR_LOCATION_INFO = 127,
109 RADIUS_ATTR_LOCATION_DATA = 128,
110 RADIUS_ATTR_BASIC_LOCATION_POLICY_RULES = 129,
111 RADIUS_ATTR_EXTENDED_LOCATION_POLICY_RULES = 130,
112 RADIUS_ATTR_LOCATION_CAPABLE = 131,
113 RADIUS_ATTR_REQUESTED_LOCATION_INFO = 132,
114 RADIUS_ATTR_GSS_ACCEPTOR_SERVICE_NAME = 164,
115 RADIUS_ATTR_GSS_ACCEPTOR_HOST_NAME = 165,
116 RADIUS_ATTR_GSS_ACCEPTOR_SERVICE_SPECIFICS = 166,
117 RADIUS_ATTR_GSS_ACCEPTOR_REALM_NAME = 167,
118 RADIUS_ATTR_MOBILITY_DOMAIN_ID = 177,
119 RADIUS_ATTR_WLAN_HESSID = 181,
120 RADIUS_ATTR_WLAN_REASON_CODE = 185,
121 RADIUS_ATTR_WLAN_PAIRWISE_CIPHER = 186,
122 RADIUS_ATTR_WLAN_GROUP_CIPHER = 187,
123 RADIUS_ATTR_WLAN_AKM_SUITE = 188,
124 RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER = 189,
125 RADIUS_ATTR_EXT_TYPE_1 = 241,
126 RADIUS_ATTR_EXT_TYPE_2 = 242,
127 RADIUS_ATTR_EXT_TYPE_3 = 243,
128 RADIUS_ATTR_EXT_TYPE_4 = 244,
129 RADIUS_ATTR_LONG_EXT_TYPE_1 = 245,
130 RADIUS_ATTR_LONG_EXT_TYPE_2 = 246,
131 RADIUS_ATTR_EXT_VENDOR_SPECIFIC_1 = (241 << 8) | 26,
132 RADIUS_ATTR_EXT_VENDOR_SPECIFIC_2 = (242 << 8) | 26,
133 RADIUS_ATTR_EXT_VENDOR_SPECIFIC_3 = (243 << 8) | 26,
134 RADIUS_ATTR_EXT_VENDOR_SPECIFIC_4 = (244 << 8) | 26,
135 RADIUS_ATTR_EXT_VENDOR_SPECIFIC_5 = (245 << 8) | 26,
136 RADIUS_ATTR_EXT_VENDOR_SPECIFIC_6 = (246 << 8) | 26,
137 };
138
139
140 /* Service-Type values (RFC 2865, 5.6) */
141 #define RADIUS_SERVICE_TYPE_FRAMED 2
142
143 /* Termination-Action */
144 #define RADIUS_TERMINATION_ACTION_DEFAULT 0
145 #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
146
147 /* NAS-Port-Type */
148 #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
149
150 /* Acct-Status-Type */
151 #define RADIUS_ACCT_STATUS_TYPE_START 1
152 #define RADIUS_ACCT_STATUS_TYPE_STOP 2
153 #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
154 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
155 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
156
157 /* Acct-Authentic */
158 #define RADIUS_ACCT_AUTHENTIC_RADIUS 1
159 #define RADIUS_ACCT_AUTHENTIC_LOCAL 2
160 #define RADIUS_ACCT_AUTHENTIC_REMOTE 3
161
162 /* Acct-Terminate-Cause */
163 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
164 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
165 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
166 #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
167 #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
168 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
169 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
170 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
171 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
172 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
173 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
174 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
175 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
176 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
177 #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
178 #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
179 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
180 #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
181
182 #define RADIUS_TUNNEL_TAGS 32
183
184 /* Tunnel-Type */
185 #define RADIUS_TUNNEL_TYPE_PPTP 1
186 #define RADIUS_TUNNEL_TYPE_L2TP 3
187 #define RADIUS_TUNNEL_TYPE_IPIP 7
188 #define RADIUS_TUNNEL_TYPE_GRE 10
189 #define RADIUS_TUNNEL_TYPE_VLAN 13
190
191 /* Tunnel-Medium-Type */
192 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
193 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
194 #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
195
196
197 struct radius_attr_vendor {
198 u8 vendor_type;
199 u8 vendor_length;
200 } STRUCT_PACKED;
201
202 #define RADIUS_VENDOR_ID_CISCO 9
203 #define RADIUS_CISCO_AV_PAIR 1
204
205 /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
206 #define RADIUS_VENDOR_ID_MICROSOFT 311
207
208 enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
209 RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
210 };
211
212 /* FreeRADIUS vendor-specific attributes */
213 #define RADIUS_VENDOR_ID_FREERADIUS 11344
214 /* Extended-Vendor-Specific-5 (245.26; long extended header) */
215 enum {
216 RADIUS_VENDOR_ATTR_FREERADIUS_802_1X_ANONCE = 1,
217 RADIUS_VENDOR_ATTR_FREERADIUS_802_1X_EAPOL_KEY_MSG = 2,
218 };
219
220 /* Hotspot 2.0 - WFA Vendor-specific RADIUS Attributes */
221 #define RADIUS_VENDOR_ID_WFA 40808
222
223 enum {
224 RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION = 1,
225 RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION = 2,
226 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION = 3,
227 RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ = 4,
228 RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL = 5,
229 RADIUS_VENDOR_ATTR_WFA_HS20_ROAMING_CONSORTIUM = 6,
230 RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILENAME = 7,
231 RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP = 8,
232 RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING = 9,
233 RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL = 10,
234 };
235
236 #ifdef _MSC_VER
237 #pragma pack(pop)
238 #endif /* _MSC_VER */
239
240 struct radius_ms_mppe_keys {
241 u8 *send;
242 size_t send_len;
243 u8 *recv;
244 size_t recv_len;
245 };
246
247
248 struct radius_msg;
249
250 /* Default size to be allocated for new RADIUS messages */
251 #define RADIUS_DEFAULT_MSG_SIZE 1024
252
253 /* Default size to be allocated for attribute array */
254 #define RADIUS_DEFAULT_ATTR_COUNT 16
255
256 /* Maximum message length for incoming RADIUS messages, as stated in RFC 2865
257 * Section 3 ("Packet Format").*/
258 #define RADIUS_MAX_MSG_LEN 4096
259
260 /* MAC address ASCII format for IEEE 802.1X use
261 * (draft-congdon-radius-8021x-20.txt) */
262 #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
263 /* MAC address ASCII format for non-802.1X use */
264 #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
265
266 struct radius_hdr * radius_msg_get_hdr(struct radius_msg *msg);
267 struct wpabuf * radius_msg_get_buf(struct radius_msg *msg);
268 struct radius_msg * radius_msg_new(u8 code, u8 identifier);
269 void radius_msg_free(struct radius_msg *msg);
270 void radius_msg_dump(struct radius_msg *msg);
271 u8 * radius_msg_add_msg_auth(struct radius_msg *msg);
272 int radius_msg_finish(struct radius_msg *msg, const u8 *secret,
273 size_t secret_len);
274 int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
275 size_t secret_len, const u8 *req_authenticator);
276 int radius_msg_finish_das_resp(struct radius_msg *msg, const u8 *secret,
277 size_t secret_len,
278 const struct radius_hdr *req_hdr);
279 void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
280 size_t secret_len);
281 void radius_msg_finish_acct_resp(struct radius_msg *msg, const u8 *secret,
282 size_t secret_len,
283 const u8 *req_authenticator);
284 int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
285 size_t secret_len);
286 int radius_msg_verify_das_req(struct radius_msg *msg, const u8 *secret,
287 size_t secret_len,
288 int require_message_authenticator);
289 struct radius_attr_hdr * radius_msg_add_attr(struct radius_msg *msg, u16 type,
290 const u8 *data, size_t data_len);
291 struct radius_msg * radius_msg_parse(const u8 *data, size_t len);
292 int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
293 size_t data_len);
294 struct wpabuf * radius_msg_get_eap(struct radius_msg *msg);
295 int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
296 size_t secret_len, struct radius_msg *sent_msg,
297 int auth);
298 int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
299 size_t secret_len, const u8 *req_auth);
300 int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
301 u8 type);
302 int radius_msg_make_authenticator(struct radius_msg *msg);
303 struct radius_ms_mppe_keys *
304 radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
305 const u8 *secret, size_t secret_len);
306 struct radius_ms_mppe_keys *
307 radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
308 const u8 *secret, size_t secret_len);
309 int radius_msg_add_mppe_keys(struct radius_msg *msg,
310 const u8 *req_authenticator,
311 const u8 *secret, size_t secret_len,
312 const u8 *send_key, size_t send_key_len,
313 const u8 *recv_key, size_t recv_key_len);
314 int radius_msg_add_wfa(struct radius_msg *msg, u8 subtype, const u8 *data,
315 size_t len);
316 int radius_msg_add_ext_vs(struct radius_msg *msg, u16 type, u32 vendor_id,
317 u8 vendor_type, const u8 *data, size_t len);
318 int radius_user_password_hide(struct radius_msg *msg,
319 const u8 *data, size_t data_len,
320 const u8 *secret, size_t secret_len,
321 u8 *buf, size_t buf_len);
322 struct radius_attr_hdr *
323 radius_msg_add_attr_user_password(struct radius_msg *msg,
324 const u8 *data, size_t data_len,
325 const u8 *secret, size_t secret_len);
326 int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
327 int radius_msg_get_vlanid(struct radius_msg *msg, int *untagged, int numtagged,
328 int *tagged);
329 char * radius_msg_get_tunnel_password(struct radius_msg *msg, int *keylen,
330 const u8 *secret, size_t secret_len,
331 struct radius_msg *sent_msg, size_t n);
332
radius_msg_add_attr_int32(struct radius_msg * msg,u8 type,u32 value)333 static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
334 u32 value)
335 {
336 u32 val = htonl(value);
337 return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
338 }
339
radius_msg_get_attr_int32(struct radius_msg * msg,u8 type,u32 * value)340 static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
341 u32 *value)
342 {
343 u32 val;
344 int res;
345 res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
346 if (res != 4)
347 return -1;
348
349 *value = ntohl(val);
350 return 0;
351 }
352 int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
353 size_t *len, const u8 *start);
354 int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
355
356
357 struct radius_attr_data {
358 u8 *data;
359 size_t len;
360 };
361
362 struct radius_class_data {
363 struct radius_attr_data *attr;
364 size_t count;
365 };
366
367 void radius_free_class(struct radius_class_data *c);
368 int radius_copy_class(struct radius_class_data *dst,
369 const struct radius_class_data *src);
370
371 u8 radius_msg_find_unlisted_attr(struct radius_msg *msg, u8 *attrs);
372
373 int radius_gen_session_id(u8 *id, size_t len);
374
375 #endif /* RADIUS_H */
376