227 lines
7.7 KiB
C
227 lines
7.7 KiB
C
#ifndef RADIUS_H
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#define RADIUS_H
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/* RFC 2865 - RADIUS */
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struct radius_hdr {
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u8 code;
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u8 identifier;
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u16 length; /* including this header */
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u8 authenticator[16];
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/* followed by length-20 octets of attributes */
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} __attribute__ ((packed));
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enum { RADIUS_CODE_ACCESS_REQUEST = 1,
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RADIUS_CODE_ACCESS_ACCEPT = 2,
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RADIUS_CODE_ACCESS_REJECT = 3,
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RADIUS_CODE_ACCOUNTING_REQUEST = 4,
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RADIUS_CODE_ACCOUNTING_RESPONSE = 5,
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RADIUS_CODE_ACCESS_CHALLENGE = 11,
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RADIUS_CODE_STATUS_SERVER = 12,
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RADIUS_CODE_STATUS_CLIENT = 13,
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RADIUS_CODE_RESERVED = 255
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};
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struct radius_attr_hdr {
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u8 type;
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u8 length; /* including this header */
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/* followed by length-2 octets of attribute value */
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} __attribute__ ((packed));
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#define RADIUS_MAX_ATTR_LEN (255 - sizeof(struct radius_attr_hdr))
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enum { RADIUS_ATTR_USER_NAME = 1,
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RADIUS_ATTR_USER_PASSWORD = 2,
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RADIUS_ATTR_NAS_IP_ADDRESS = 4,
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RADIUS_ATTR_NAS_PORT = 5,
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RADIUS_ATTR_FRAMED_MTU = 12,
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RADIUS_ATTR_STATE = 24,
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RADIUS_ATTR_CLASS = 25,
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RADIUS_ATTR_VENDOR_SPECIFIC = 26,
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RADIUS_ATTR_SESSION_TIMEOUT = 27,
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RADIUS_ATTR_IDLE_TIMEOUT = 28,
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RADIUS_ATTR_TERMINATION_ACTION = 29,
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RADIUS_ATTR_CALLED_STATION_ID = 30,
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RADIUS_ATTR_CALLING_STATION_ID = 31,
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RADIUS_ATTR_NAS_IDENTIFIER = 32,
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RADIUS_ATTR_ACCT_STATUS_TYPE = 40,
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RADIUS_ATTR_ACCT_DELAY_TIME = 41,
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RADIUS_ATTR_ACCT_INPUT_OCTETS = 42,
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RADIUS_ATTR_ACCT_OUTPUT_OCTETS = 43,
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RADIUS_ATTR_ACCT_SESSION_ID = 44,
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RADIUS_ATTR_ACCT_AUTHENTIC = 45,
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RADIUS_ATTR_ACCT_SESSION_TIME = 46,
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RADIUS_ATTR_ACCT_INPUT_PACKETS = 47,
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RADIUS_ATTR_ACCT_OUTPUT_PACKETS = 48,
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RADIUS_ATTR_ACCT_TERMINATE_CAUSE = 49,
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RADIUS_ATTR_ACCT_MULTI_SESSION_ID = 50,
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RADIUS_ATTR_ACCT_LINK_COUNT = 51,
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RADIUS_ATTR_ACCT_INPUT_GIGAWORDS = 52,
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RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS = 53,
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RADIUS_ATTR_EVENT_TIMESTAMP = 55,
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RADIUS_ATTR_NAS_PORT_TYPE = 61,
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RADIUS_ATTR_CONNECT_INFO = 77,
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RADIUS_ATTR_EAP_MESSAGE = 79,
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RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80,
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RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85,
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RADIUS_ATTR_NAS_IPV6_ADDRESS = 95
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};
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/* Termination-Action */
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#define RADIUS_TERMINATION_ACTION_DEFAULT 0
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#define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
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/* NAS-Port-Type */
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#define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
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/* Acct-Status-Type */
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#define RADIUS_ACCT_STATUS_TYPE_START 1
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#define RADIUS_ACCT_STATUS_TYPE_STOP 2
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#define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
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#define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
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#define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
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/* Acct-Authentic */
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#define RADIUS_ACCT_AUTHENTIC_RADIUS 1
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#define RADIUS_ACCT_AUTHENTIC_LOCAL 2
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#define RADIUS_ACCT_AUTHENTIC_REMOTE 3
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/* Acct-Terminate-Cause */
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#define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
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#define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
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#define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
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#define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
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#define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
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#define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
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#define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
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#define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
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#define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
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#define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
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#define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
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#define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
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#define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
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#define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
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#define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
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#define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
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#define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
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#define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
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struct radius_attr_vendor {
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u8 vendor_type;
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u8 vendor_length;
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} __attribute__ ((packed));
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#define RADIUS_VENDOR_ID_CISCO 9
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#define RADIUS_CISCO_AV_PAIR 1
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/* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
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#define RADIUS_VENDOR_ID_MICROSOFT 311
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enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
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RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
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};
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struct radius_ms_mppe_keys {
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u8 *send;
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size_t send_len;
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u8 *recv;
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size_t recv_len;
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};
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/* RADIUS message structure for new and parsed messages */
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struct radius_msg {
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unsigned char *buf;
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size_t buf_size; /* total size allocated for buf */
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size_t buf_used; /* bytes used in buf */
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struct radius_hdr *hdr;
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struct radius_attr_hdr **attrs; /* array of pointers to attributes */
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size_t attr_size; /* total size of the attribute pointer array */
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size_t attr_used; /* total number of attributes in the array */
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};
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/* Default size to be allocated for new RADIUS messages */
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#define RADIUS_DEFAULT_MSG_SIZE 1024
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/* Default size to be allocated for attribute array */
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#define RADIUS_DEFAULT_ATTR_COUNT 16
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/* MAC address ASCII format for IEEE 802.1X use
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* (draft-congdon-radius-8021x-20.txt) */
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#define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
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/* MAC address ASCII format for non-802.1X use */
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#define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
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struct radius_msg *radius_msg_new(u8 code, u8 identifier);
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int radius_msg_initialize(struct radius_msg *msg, size_t init_len);
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void radius_msg_set_hdr(struct radius_msg *msg, u8 code, u8 identifier);
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void radius_msg_free(struct radius_msg *msg);
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void radius_msg_dump(struct radius_msg *msg);
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int radius_msg_finish(struct radius_msg *msg, u8 *secret, size_t secret_len);
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int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
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size_t secret_len, const u8 *req_authenticator);
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void radius_msg_finish_acct(struct radius_msg *msg, u8 *secret,
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size_t secret_len);
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struct radius_attr_hdr *radius_msg_add_attr(struct radius_msg *msg, u8 type,
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const u8 *data, size_t data_len);
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struct radius_msg *radius_msg_parse(const u8 *data, size_t len);
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int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
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size_t data_len);
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u8 *radius_msg_get_eap(struct radius_msg *msg, size_t *len);
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int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
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size_t secret_len, struct radius_msg *sent_msg,
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int auth);
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int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
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size_t secret_len, const u8 *req_auth);
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int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
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u8 type);
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void radius_msg_make_authenticator(struct radius_msg *msg,
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u8 *data, size_t len);
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struct radius_ms_mppe_keys *
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radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
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u8 *secret, size_t secret_len);
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struct radius_ms_mppe_keys *
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radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
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u8 *secret, size_t secret_len);
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int radius_msg_add_mppe_keys(struct radius_msg *msg,
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const u8 *req_authenticator,
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const u8 *secret, size_t secret_len,
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const u8 *send_key, size_t send_key_len,
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const u8 *recv_key, size_t recv_key_len);
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struct radius_attr_hdr *
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radius_msg_add_attr_user_password(struct radius_msg *msg,
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u8 *data, size_t data_len,
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u8 *secret, size_t secret_len);
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int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
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static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
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u32 value)
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{
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u32 val = htonl(value);
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return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
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}
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static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
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u32 *value)
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{
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u32 val;
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int res;
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res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
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if (res != 4)
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return -1;
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*value = ntohl(val);
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return 0;
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}
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int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
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size_t *len, const u8 *start);
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int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
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#endif /* RADIUS_H */
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