1 /*
2 * RADIUS message processing
3 * Copyright (c) 2002-2009, 2012, 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_FRAMED_MTU = 12,
56 RADIUS_ATTR_REPLY_MESSAGE = 18,
57 RADIUS_ATTR_STATE = 24,
58 RADIUS_ATTR_CLASS = 25,
59 RADIUS_ATTR_VENDOR_SPECIFIC = 26,
60 RADIUS_ATTR_SESSION_TIMEOUT = 27,
61 RADIUS_ATTR_IDLE_TIMEOUT = 28,
62 RADIUS_ATTR_TERMINATION_ACTION = 29,
63 RADIUS_ATTR_CALLED_STATION_ID = 30,
64 RADIUS_ATTR_CALLING_STATION_ID = 31,
65 RADIUS_ATTR_NAS_IDENTIFIER = 32,
66 RADIUS_ATTR_PROXY_STATE = 33,
67 RADIUS_ATTR_ACCT_STATUS_TYPE = 40,
68 RADIUS_ATTR_ACCT_DELAY_TIME = 41,
69 RADIUS_ATTR_ACCT_INPUT_OCTETS = 42,
70 RADIUS_ATTR_ACCT_OUTPUT_OCTETS = 43,
71 RADIUS_ATTR_ACCT_SESSION_ID = 44,
72 RADIUS_ATTR_ACCT_AUTHENTIC = 45,
73 RADIUS_ATTR_ACCT_SESSION_TIME = 46,
74 RADIUS_ATTR_ACCT_INPUT_PACKETS = 47,
75 RADIUS_ATTR_ACCT_OUTPUT_PACKETS = 48,
76 RADIUS_ATTR_ACCT_TERMINATE_CAUSE = 49,
77 RADIUS_ATTR_ACCT_MULTI_SESSION_ID = 50,
78 RADIUS_ATTR_ACCT_LINK_COUNT = 51,
79 RADIUS_ATTR_ACCT_INPUT_GIGAWORDS = 52,
80 RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS = 53,
81 RADIUS_ATTR_EVENT_TIMESTAMP = 55,
82 RADIUS_ATTR_NAS_PORT_TYPE = 61,
83 RADIUS_ATTR_TUNNEL_TYPE = 64,
84 RADIUS_ATTR_TUNNEL_MEDIUM_TYPE = 65,
85 RADIUS_ATTR_TUNNEL_PASSWORD = 69,
86 RADIUS_ATTR_CONNECT_INFO = 77,
87 RADIUS_ATTR_EAP_MESSAGE = 79,
88 RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80,
89 RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID = 81,
90 RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85,
91 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY = 89,
92 RADIUS_ATTR_NAS_IPV6_ADDRESS = 95,
93 RADIUS_ATTR_ERROR_CAUSE = 101
94 };
95
96
97 /* Termination-Action */
98 #define RADIUS_TERMINATION_ACTION_DEFAULT 0
99 #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
100
101 /* NAS-Port-Type */
102 #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
103
104 /* Acct-Status-Type */
105 #define RADIUS_ACCT_STATUS_TYPE_START 1
106 #define RADIUS_ACCT_STATUS_TYPE_STOP 2
107 #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
108 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
109 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
110
111 /* Acct-Authentic */
112 #define RADIUS_ACCT_AUTHENTIC_RADIUS 1
113 #define RADIUS_ACCT_AUTHENTIC_LOCAL 2
114 #define RADIUS_ACCT_AUTHENTIC_REMOTE 3
115
116 /* Acct-Terminate-Cause */
117 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
118 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
119 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
120 #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
121 #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
122 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
123 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
124 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
125 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
126 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
127 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
128 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
129 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
130 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
131 #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
132 #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
133 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
134 #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
135
136 #define RADIUS_TUNNEL_TAGS 32
137
138 /* Tunnel-Type */
139 #define RADIUS_TUNNEL_TYPE_PPTP 1
140 #define RADIUS_TUNNEL_TYPE_L2TP 3
141 #define RADIUS_TUNNEL_TYPE_IPIP 7
142 #define RADIUS_TUNNEL_TYPE_GRE 10
143 #define RADIUS_TUNNEL_TYPE_VLAN 13
144
145 /* Tunnel-Medium-Type */
146 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
147 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
148 #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
149
150
151 struct radius_attr_vendor {
152 u8 vendor_type;
153 u8 vendor_length;
154 } STRUCT_PACKED;
155
156 #define RADIUS_VENDOR_ID_CISCO 9
157 #define RADIUS_CISCO_AV_PAIR 1
158
159 /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
160 #define RADIUS_VENDOR_ID_MICROSOFT 311
161
162 enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
163 RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
164 };
165
166 #ifdef _MSC_VER
167 #pragma pack(pop)
168 #endif /* _MSC_VER */
169
170 struct radius_ms_mppe_keys {
171 u8 *send;
172 size_t send_len;
173 u8 *recv;
174 size_t recv_len;
175 };
176
177
178 struct radius_msg;
179
180 /* Default size to be allocated for new RADIUS messages */
181 #define RADIUS_DEFAULT_MSG_SIZE 1024
182
183 /* Default size to be allocated for attribute array */
184 #define RADIUS_DEFAULT_ATTR_COUNT 16
185
186
187 /* MAC address ASCII format for IEEE 802.1X use
188 * (draft-congdon-radius-8021x-20.txt) */
189 #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
190 /* MAC address ASCII format for non-802.1X use */
191 #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
192
193 struct radius_hdr * radius_msg_get_hdr(struct radius_msg *msg);
194 struct wpabuf * radius_msg_get_buf(struct radius_msg *msg);
195 struct radius_msg * radius_msg_new(u8 code, u8 identifier);
196 void radius_msg_free(struct radius_msg *msg);
197 void radius_msg_dump(struct radius_msg *msg);
198 int radius_msg_finish(struct radius_msg *msg, const u8 *secret,
199 size_t secret_len);
200 int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
201 size_t secret_len, const u8 *req_authenticator);
202 int radius_msg_finish_das_resp(struct radius_msg *msg, const u8 *secret,
203 size_t secret_len,
204 const struct radius_hdr *req_hdr);
205 void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
206 size_t secret_len);
207 int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
208 size_t secret_len);
209 int radius_msg_verify_das_req(struct radius_msg *msg, const 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 struct wpabuf * radius_msg_get_eap(struct radius_msg *msg);
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 const 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 const 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 const u8 *data, size_t data_len,
240 const 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 char * radius_msg_get_tunnel_password(struct radius_msg *msg, int *keylen,
244 const u8 *secret, size_t secret_len,
245 struct radius_msg *sent_msg, size_t n);
246
radius_msg_add_attr_int32(struct radius_msg * msg,u8 type,u32 value)247 static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
248 u32 value)
249 {
250 u32 val = htonl(value);
251 return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
252 }
253
radius_msg_get_attr_int32(struct radius_msg * msg,u8 type,u32 * value)254 static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
255 u32 *value)
256 {
257 u32 val;
258 int res;
259 res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
260 if (res != 4)
261 return -1;
262
263 *value = ntohl(val);
264 return 0;
265 }
266 int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
267 size_t *len, const u8 *start);
268 int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
269
270
271 struct radius_attr_data {
272 u8 *data;
273 size_t len;
274 };
275
276 struct radius_class_data {
277 struct radius_attr_data *attr;
278 size_t count;
279 };
280
281 void radius_free_class(struct radius_class_data *c);
282 int radius_copy_class(struct radius_class_data *dst,
283 const struct radius_class_data *src);
284
285 u8 radius_msg_find_unlisted_attr(struct radius_msg *msg, u8 *attrs);
286
287 #endif /* RADIUS_H */
288