contrib/hostapd-0.4.9/radius.h

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