1 /* 2 * RADIUS message processing 3 * Copyright (c) 2002-2009, 2012, Jouni Malinen <j (at) 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); 246 247 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 } 253 254 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
