1 /*
2 * RADIUS message processing
3 * Copyright (c) 2002-2009, 2012, 2014-2015, 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 #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_SERVICE_TYPE = 6,
56 RADIUS_ATTR_FRAMED_IP_ADDRESS = 8,
57 RADIUS_ATTR_FRAMED_MTU = 12,
58 RADIUS_ATTR_REPLY_MESSAGE = 18,
59 RADIUS_ATTR_STATE = 24,
60 RADIUS_ATTR_CLASS = 25,
61 RADIUS_ATTR_VENDOR_SPECIFIC = 26,
62 RADIUS_ATTR_SESSION_TIMEOUT = 27,
63 RADIUS_ATTR_IDLE_TIMEOUT = 28,
64 RADIUS_ATTR_TERMINATION_ACTION = 29,
65 RADIUS_ATTR_CALLED_STATION_ID = 30,
66 RADIUS_ATTR_CALLING_STATION_ID = 31,
67 RADIUS_ATTR_NAS_IDENTIFIER = 32,
68 RADIUS_ATTR_PROXY_STATE = 33,
69 RADIUS_ATTR_ACCT_STATUS_TYPE = 40,
70 RADIUS_ATTR_ACCT_DELAY_TIME = 41,
71 RADIUS_ATTR_ACCT_INPUT_OCTETS = 42,
72 RADIUS_ATTR_ACCT_OUTPUT_OCTETS = 43,
73 RADIUS_ATTR_ACCT_SESSION_ID = 44,
74 RADIUS_ATTR_ACCT_AUTHENTIC = 45,
75 RADIUS_ATTR_ACCT_SESSION_TIME = 46,
76 RADIUS_ATTR_ACCT_INPUT_PACKETS = 47,
77 RADIUS_ATTR_ACCT_OUTPUT_PACKETS = 48,
78 RADIUS_ATTR_ACCT_TERMINATE_CAUSE = 49,
79 RADIUS_ATTR_ACCT_MULTI_SESSION_ID = 50,
80 RADIUS_ATTR_ACCT_LINK_COUNT = 51,
81 RADIUS_ATTR_ACCT_INPUT_GIGAWORDS = 52,
82 RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS = 53,
83 RADIUS_ATTR_EVENT_TIMESTAMP = 55,
84 RADIUS_ATTR_EGRESS_VLANID = 56,
85 RADIUS_ATTR_NAS_PORT_TYPE = 61,
86 RADIUS_ATTR_TUNNEL_TYPE = 64,
87 RADIUS_ATTR_TUNNEL_MEDIUM_TYPE = 65,
88 RADIUS_ATTR_TUNNEL_PASSWORD = 69,
89 RADIUS_ATTR_CONNECT_INFO = 77,
90 RADIUS_ATTR_EAP_MESSAGE = 79,
91 RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80,
92 RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID = 81,
93 RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85,
94 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY = 89,
95 RADIUS_ATTR_NAS_IPV6_ADDRESS = 95,
96 RADIUS_ATTR_ERROR_CAUSE = 101,
97 RADIUS_ATTR_EAP_KEY_NAME = 102,
98 RADIUS_ATTR_OPERATOR_NAME = 126,
99 RADIUS_ATTR_LOCATION_INFO = 127,
100 RADIUS_ATTR_LOCATION_DATA = 128,
101 RADIUS_ATTR_BASIC_LOCATION_POLICY_RULES = 129,
102 RADIUS_ATTR_EXTENDED_LOCATION_POLICY_RULES = 130,
103 RADIUS_ATTR_LOCATION_CAPABLE = 131,
104 RADIUS_ATTR_REQUESTED_LOCATION_INFO = 132,
105 RADIUS_ATTR_MOBILITY_DOMAIN_ID = 177,
106 RADIUS_ATTR_WLAN_HESSID = 181,
107 RADIUS_ATTR_WLAN_PAIRWISE_CIPHER = 186,
108 RADIUS_ATTR_WLAN_GROUP_CIPHER = 187,
109 RADIUS_ATTR_WLAN_AKM_SUITE = 188,
110 RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER = 189,
111 };
112
113
114 /* Service-Type values (RFC 2865, 5.6) */
115 #define RADIUS_SERVICE_TYPE_FRAMED 2
116
117 /* Termination-Action */
118 #define RADIUS_TERMINATION_ACTION_DEFAULT 0
119 #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
120
121 /* NAS-Port-Type */
122 #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
123
124 /* Acct-Status-Type */
125 #define RADIUS_ACCT_STATUS_TYPE_START 1
126 #define RADIUS_ACCT_STATUS_TYPE_STOP 2
127 #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
128 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
129 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
130
131 /* Acct-Authentic */
132 #define RADIUS_ACCT_AUTHENTIC_RADIUS 1
133 #define RADIUS_ACCT_AUTHENTIC_LOCAL 2
134 #define RADIUS_ACCT_AUTHENTIC_REMOTE 3
135
136 /* Acct-Terminate-Cause */
137 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
138 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
139 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
140 #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
141 #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
142 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
143 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
144 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
145 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
146 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
147 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
148 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
149 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
150 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
151 #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
152 #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
153 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
154 #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
155
156 #define RADIUS_TUNNEL_TAGS 32
157
158 /* Tunnel-Type */
159 #define RADIUS_TUNNEL_TYPE_PPTP 1
160 #define RADIUS_TUNNEL_TYPE_L2TP 3
161 #define RADIUS_TUNNEL_TYPE_IPIP 7
162 #define RADIUS_TUNNEL_TYPE_GRE 10
163 #define RADIUS_TUNNEL_TYPE_VLAN 13
164
165 /* Tunnel-Medium-Type */
166 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
167 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
168 #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
169
170
171 struct radius_attr_vendor {
172 u8 vendor_type;
173 u8 vendor_length;
174 } STRUCT_PACKED;
175
176 #define RADIUS_VENDOR_ID_CISCO 9
177 #define RADIUS_CISCO_AV_PAIR 1
178
179 /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
180 #define RADIUS_VENDOR_ID_MICROSOFT 311
181
182 enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
183 RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
184 };
185
186
187 /* Hotspot 2.0 - WFA Vendor-specific RADIUS Attributes */
188 #define RADIUS_VENDOR_ID_WFA 40808
189
190 enum {
191 RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION = 1,
192 RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION = 2,
193 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION = 3,
194 RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ = 4,
195 RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL = 5,
196 };
197
198 #ifdef _MSC_VER
199 #pragma pack(pop)
200 #endif /* _MSC_VER */
201
202 struct radius_ms_mppe_keys {
203 u8 *send;
204 size_t send_len;
205 u8 *recv;
206 size_t recv_len;
207 };
208
209
210 struct radius_msg;
211
212 /* Default size to be allocated for new RADIUS messages */
213 #define RADIUS_DEFAULT_MSG_SIZE 1024
214
215 /* Default size to be allocated for attribute array */
216 #define RADIUS_DEFAULT_ATTR_COUNT 16
217
218
219 /* MAC address ASCII format for IEEE 802.1X use
220 * (draft-congdon-radius-8021x-20.txt) */
221 #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
222 /* MAC address ASCII format for non-802.1X use */
223 #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
224
225 struct radius_hdr * radius_msg_get_hdr(struct radius_msg *msg);
226 struct wpabuf * radius_msg_get_buf(struct radius_msg *msg);
227 struct radius_msg * radius_msg_new(u8 code, u8 identifier);
228 void radius_msg_free(struct radius_msg *msg);
229 void radius_msg_dump(struct radius_msg *msg);
230 int radius_msg_finish(struct radius_msg *msg, const u8 *secret,
231 size_t secret_len);
232 int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
233 size_t secret_len, const u8 *req_authenticator);
234 int radius_msg_finish_das_resp(struct radius_msg *msg, const u8 *secret,
235 size_t secret_len,
236 const struct radius_hdr *req_hdr);
237 void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
238 size_t secret_len);
239 void radius_msg_finish_acct_resp(struct radius_msg *msg, const u8 *secret,
240 size_t secret_len,
241 const u8 *req_authenticator);
242 int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
243 size_t secret_len);
244 int radius_msg_verify_das_req(struct radius_msg *msg, const u8 *secret,
245 size_t secret_len,
246 int require_message_authenticator);
247 struct radius_attr_hdr * radius_msg_add_attr(struct radius_msg *msg, u8 type,
248 const u8 *data, size_t data_len);
249 struct radius_msg * radius_msg_parse(const u8 *data, size_t len);
250 int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
251 size_t data_len);
252 struct wpabuf * radius_msg_get_eap(struct radius_msg *msg);
253 int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
254 size_t secret_len, struct radius_msg *sent_msg,
255 int auth);
256 int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
257 size_t secret_len, const u8 *req_auth);
258 int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
259 u8 type);
260 int radius_msg_make_authenticator(struct radius_msg *msg);
261 struct radius_ms_mppe_keys *
262 radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
263 const u8 *secret, size_t secret_len);
264 struct radius_ms_mppe_keys *
265 radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
266 const u8 *secret, size_t secret_len);
267 int radius_msg_add_mppe_keys(struct radius_msg *msg,
268 const u8 *req_authenticator,
269 const u8 *secret, size_t secret_len,
270 const u8 *send_key, size_t send_key_len,
271 const u8 *recv_key, size_t recv_key_len);
272 int radius_msg_add_wfa(struct radius_msg *msg, u8 subtype, const u8 *data,
273 size_t len);
274 int radius_user_password_hide(struct radius_msg *msg,
275 const u8 *data, size_t data_len,
276 const u8 *secret, size_t secret_len,
277 u8 *buf, size_t buf_len);
278 struct radius_attr_hdr *
279 radius_msg_add_attr_user_password(struct radius_msg *msg,
280 const u8 *data, size_t data_len,
281 const u8 *secret, size_t secret_len);
282 int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
283 int radius_msg_get_vlanid(struct radius_msg *msg, int *untagged, int numtagged,
284 int *tagged);
285 char * radius_msg_get_tunnel_password(struct radius_msg *msg, int *keylen,
286 const u8 *secret, size_t secret_len,
287 struct radius_msg *sent_msg, size_t n);
288
radius_msg_add_attr_int32(struct radius_msg * msg,u8 type,u32 value)289 static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
290 u32 value)
291 {
292 u32 val = htonl(value);
293 return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
294 }
295
radius_msg_get_attr_int32(struct radius_msg * msg,u8 type,u32 * value)296 static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
297 u32 *value)
298 {
299 u32 val;
300 int res;
301 res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
302 if (res != 4)
303 return -1;
304
305 *value = ntohl(val);
306 return 0;
307 }
308 int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
309 size_t *len, const u8 *start);
310 int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
311
312
313 struct radius_attr_data {
314 u8 *data;
315 size_t len;
316 };
317
318 struct radius_class_data {
319 struct radius_attr_data *attr;
320 size_t count;
321 };
322
323 void radius_free_class(struct radius_class_data *c);
324 int radius_copy_class(struct radius_class_data *dst,
325 const struct radius_class_data *src);
326
327 u8 radius_msg_find_unlisted_attr(struct radius_msg *msg, u8 *attrs);
328
329 int radius_gen_session_id(u8 *id, size_t len);
330
331 #endif /* RADIUS_H */
332