2 * hostapd / RADIUS message processing
3 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
23 struct radius_msg *radius_msg_new(u8 code, u8 identifier)
25 struct radius_msg *msg;
27 msg = os_malloc(sizeof(*msg));
31 if (radius_msg_initialize(msg, RADIUS_DEFAULT_MSG_SIZE)) {
36 radius_msg_set_hdr(msg, code, identifier);
42 int radius_msg_initialize(struct radius_msg *msg, size_t init_len)
44 if (msg == NULL || init_len < sizeof(struct radius_hdr))
47 os_memset(msg, 0, sizeof(*msg));
48 msg->buf = wpa_zalloc(init_len);
52 msg->buf_size = init_len;
53 msg->hdr = (struct radius_hdr *) msg->buf;
54 msg->buf_used = sizeof(*msg->hdr);
57 os_malloc(RADIUS_DEFAULT_ATTR_COUNT * sizeof(*msg->attrs));
58 if (msg->attrs == NULL) {
65 msg->attr_size = RADIUS_DEFAULT_ATTR_COUNT;
72 void radius_msg_set_hdr(struct radius_msg *msg, u8 code, u8 identifier)
74 msg->hdr->code = code;
75 msg->hdr->identifier = identifier;
79 void radius_msg_free(struct radius_msg *msg)
81 if (msg->buf != NULL) {
86 msg->buf_size = msg->buf_used = 0;
88 if (msg->attrs != NULL) {
92 msg->attr_size = msg->attr_used = 0;
96 static const char *radius_code_string(u8 code)
99 case RADIUS_CODE_ACCESS_REQUEST: return "Access-Request";
100 case RADIUS_CODE_ACCESS_ACCEPT: return "Access-Accept";
101 case RADIUS_CODE_ACCESS_REJECT: return "Access-Reject";
102 case RADIUS_CODE_ACCOUNTING_REQUEST: return "Accounting-Request";
103 case RADIUS_CODE_ACCOUNTING_RESPONSE: return "Accounting-Response";
104 case RADIUS_CODE_ACCESS_CHALLENGE: return "Access-Challenge";
105 case RADIUS_CODE_STATUS_SERVER: return "Status-Server";
106 case RADIUS_CODE_STATUS_CLIENT: return "Status-Client";
107 case RADIUS_CODE_RESERVED: return "Reserved";
108 default: return "?Unknown?";
113 struct radius_attr_type {
117 RADIUS_ATTR_UNDIST, RADIUS_ATTR_TEXT, RADIUS_ATTR_IP,
118 RADIUS_ATTR_HEXDUMP, RADIUS_ATTR_INT32, RADIUS_ATTR_IPV6
122 static struct radius_attr_type radius_attrs[] =
124 { RADIUS_ATTR_USER_NAME, "User-Name", RADIUS_ATTR_TEXT },
125 { RADIUS_ATTR_USER_PASSWORD, "User-Password", RADIUS_ATTR_UNDIST },
126 { RADIUS_ATTR_NAS_IP_ADDRESS, "NAS-IP-Address", RADIUS_ATTR_IP },
127 { RADIUS_ATTR_NAS_PORT, "NAS-Port", RADIUS_ATTR_INT32 },
128 { RADIUS_ATTR_FRAMED_MTU, "Framed-MTU", RADIUS_ATTR_INT32 },
129 { RADIUS_ATTR_STATE, "State", RADIUS_ATTR_UNDIST },
130 { RADIUS_ATTR_CLASS, "Class", RADIUS_ATTR_UNDIST },
131 { RADIUS_ATTR_VENDOR_SPECIFIC, "Vendor-Specific", RADIUS_ATTR_UNDIST },
132 { RADIUS_ATTR_SESSION_TIMEOUT, "Session-Timeout", RADIUS_ATTR_INT32 },
133 { RADIUS_ATTR_IDLE_TIMEOUT, "Idle-Timeout", RADIUS_ATTR_INT32 },
134 { RADIUS_ATTR_TERMINATION_ACTION, "Termination-Action",
136 { RADIUS_ATTR_CALLED_STATION_ID, "Called-Station-Id",
138 { RADIUS_ATTR_CALLING_STATION_ID, "Calling-Station-Id",
140 { RADIUS_ATTR_NAS_IDENTIFIER, "NAS-Identifier", RADIUS_ATTR_TEXT },
141 { RADIUS_ATTR_ACCT_STATUS_TYPE, "Acct-Status-Type",
143 { RADIUS_ATTR_ACCT_DELAY_TIME, "Acct-Delay-Time", RADIUS_ATTR_INT32 },
144 { RADIUS_ATTR_ACCT_INPUT_OCTETS, "Acct-Input-Octets",
146 { RADIUS_ATTR_ACCT_OUTPUT_OCTETS, "Acct-Output-Octets",
148 { RADIUS_ATTR_ACCT_SESSION_ID, "Acct-Session-Id", RADIUS_ATTR_TEXT },
149 { RADIUS_ATTR_ACCT_AUTHENTIC, "Acct-Authentic", RADIUS_ATTR_INT32 },
150 { RADIUS_ATTR_ACCT_SESSION_TIME, "Acct-Session-Time",
152 { RADIUS_ATTR_ACCT_INPUT_PACKETS, "Acct-Input-Packets",
154 { RADIUS_ATTR_ACCT_OUTPUT_PACKETS, "Acct-Output-Packets",
156 { RADIUS_ATTR_ACCT_TERMINATE_CAUSE, "Acct-Terminate-Cause",
158 { RADIUS_ATTR_ACCT_MULTI_SESSION_ID, "Acct-Multi-Session-Id",
160 { RADIUS_ATTR_ACCT_LINK_COUNT, "Acct-Link-Count", RADIUS_ATTR_INT32 },
161 { RADIUS_ATTR_ACCT_INPUT_GIGAWORDS, "Acct-Input-Gigawords",
163 { RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS, "Acct-Output-Gigawords",
165 { RADIUS_ATTR_EVENT_TIMESTAMP, "Event-Timestamp",
167 { RADIUS_ATTR_NAS_PORT_TYPE, "NAS-Port-Type", RADIUS_ATTR_INT32 },
168 { RADIUS_ATTR_TUNNEL_TYPE, "Tunnel-Type", RADIUS_ATTR_HEXDUMP },
169 { RADIUS_ATTR_TUNNEL_MEDIUM_TYPE, "Tunnel-Medium-Type",
170 RADIUS_ATTR_HEXDUMP },
171 { RADIUS_ATTR_CONNECT_INFO, "Connect-Info", RADIUS_ATTR_TEXT },
172 { RADIUS_ATTR_EAP_MESSAGE, "EAP-Message", RADIUS_ATTR_UNDIST },
173 { RADIUS_ATTR_MESSAGE_AUTHENTICATOR, "Message-Authenticator",
174 RADIUS_ATTR_UNDIST },
175 { RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID, "Tunnel-Private-Group-Id",
176 RADIUS_ATTR_HEXDUMP },
177 { RADIUS_ATTR_ACCT_INTERIM_INTERVAL, "Acct-Interim-Interval",
179 { RADIUS_ATTR_NAS_IPV6_ADDRESS, "NAS-IPv6-Address", RADIUS_ATTR_IPV6 },
181 #define RADIUS_ATTRS (sizeof(radius_attrs) / sizeof(radius_attrs[0]))
184 static struct radius_attr_type *radius_get_attr_type(u8 type)
188 for (i = 0; i < RADIUS_ATTRS; i++) {
189 if (type == radius_attrs[i].type)
190 return &radius_attrs[i];
197 static void print_char(char c)
199 if (c >= 32 && c < 127)
206 static void radius_msg_dump_attr(struct radius_attr_hdr *hdr)
208 struct radius_attr_type *attr;
212 attr = radius_get_attr_type(hdr->type);
214 printf(" Attribute %d (%s) length=%d\n",
215 hdr->type, attr ? attr->name : "?Unknown?", hdr->length);
220 len = hdr->length - sizeof(struct radius_attr_hdr);
221 pos = (unsigned char *) (hdr + 1);
223 switch (attr->data_type) {
224 case RADIUS_ATTR_TEXT:
226 for (i = 0; i < len; i++)
233 struct in_addr *addr = (struct in_addr *) pos;
234 printf(" Value: %s\n", inet_ntoa(*addr));
236 printf(" Invalid IP address length %d\n", len);
240 case RADIUS_ATTR_IPV6:
244 struct in6_addr *addr = (struct in6_addr *) pos;
245 atxt = inet_ntop(AF_INET6, addr, buf, sizeof(buf));
246 printf(" Value: %s\n", atxt ? atxt : "?");
248 printf(" Invalid IPv6 address length %d\n", len);
250 #endif /* CONFIG_IPV6 */
252 case RADIUS_ATTR_HEXDUMP:
253 case RADIUS_ATTR_UNDIST:
255 for (i = 0; i < len; i++)
256 printf(" %02x", pos[i]);
260 case RADIUS_ATTR_INT32:
262 printf(" Value: %u\n", WPA_GET_BE32(pos));
264 printf(" Invalid INT32 length %d\n", len);
273 void radius_msg_dump(struct radius_msg *msg)
277 printf("RADIUS message: code=%d (%s) identifier=%d length=%d\n",
278 msg->hdr->code, radius_code_string(msg->hdr->code),
279 msg->hdr->identifier, ntohs(msg->hdr->length));
281 for (i = 0; i < msg->attr_used; i++) {
282 radius_msg_dump_attr(msg->attrs[i]);
287 int radius_msg_finish(struct radius_msg *msg, u8 *secret, size_t secret_len)
290 u8 auth[MD5_MAC_LEN];
291 struct radius_attr_hdr *attr;
293 os_memset(auth, 0, MD5_MAC_LEN);
294 attr = radius_msg_add_attr(msg,
295 RADIUS_ATTR_MESSAGE_AUTHENTICATOR,
298 printf("WARNING: Could not add "
299 "Message-Authenticator\n");
302 msg->hdr->length = htons(msg->buf_used);
303 hmac_md5(secret, secret_len, msg->buf, msg->buf_used,
306 msg->hdr->length = htons(msg->buf_used);
308 if (msg->buf_used > 0xffff) {
309 printf("WARNING: too long RADIUS message (%lu)\n",
310 (unsigned long) msg->buf_used);
317 int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
318 size_t secret_len, const u8 *req_authenticator)
320 u8 auth[MD5_MAC_LEN];
321 struct radius_attr_hdr *attr;
325 os_memset(auth, 0, MD5_MAC_LEN);
326 attr = radius_msg_add_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR,
329 printf("WARNING: Could not add Message-Authenticator\n");
332 msg->hdr->length = htons(msg->buf_used);
333 os_memcpy(msg->hdr->authenticator, req_authenticator,
334 sizeof(msg->hdr->authenticator));
335 hmac_md5(secret, secret_len, msg->buf, msg->buf_used,
338 /* ResponseAuth = MD5(Code+ID+Length+RequestAuth+Attributes+Secret) */
339 addr[0] = (u8 *) msg->hdr;
341 addr[1] = req_authenticator;
342 len[1] = MD5_MAC_LEN;
343 addr[2] = (u8 *) (msg->hdr + 1);
344 len[2] = msg->buf_used - sizeof(*msg->hdr);
347 md5_vector(4, addr, len, msg->hdr->authenticator);
349 if (msg->buf_used > 0xffff) {
350 printf("WARNING: too long RADIUS message (%lu)\n",
351 (unsigned long) msg->buf_used);
358 void radius_msg_finish_acct(struct radius_msg *msg, u8 *secret,
364 msg->hdr->length = htons(msg->buf_used);
365 os_memset(msg->hdr->authenticator, 0, MD5_MAC_LEN);
367 len[0] = msg->buf_used;
370 md5_vector(2, addr, len, msg->hdr->authenticator);
372 if (msg->buf_used > 0xffff) {
373 printf("WARNING: too long RADIUS messages (%lu)\n",
374 (unsigned long) msg->buf_used);
379 static int radius_msg_add_attr_to_array(struct radius_msg *msg,
380 struct radius_attr_hdr *attr)
382 if (msg->attr_used >= msg->attr_size) {
383 struct radius_attr_hdr **nattrs;
384 int nlen = msg->attr_size * 2;
386 nattrs = os_realloc(msg->attrs, nlen * sizeof(*msg->attrs));
391 msg->attr_size = nlen;
394 msg->attrs[msg->attr_used++] = attr;
400 struct radius_attr_hdr *radius_msg_add_attr(struct radius_msg *msg, u8 type,
401 const u8 *data, size_t data_len)
404 struct radius_attr_hdr *attr;
406 if (data_len > RADIUS_MAX_ATTR_LEN) {
407 printf("radius_msg_add_attr: too long attribute (%lu bytes)\n",
408 (unsigned long) data_len);
412 buf_needed = msg->buf_used + sizeof(*attr) + data_len;
414 if (msg->buf_size < buf_needed) {
415 /* allocate more space for message buffer */
417 size_t i, nlen = msg->buf_size;
420 while (nlen < buf_needed)
422 nbuf = os_realloc(msg->buf, nlen);
425 diff = nbuf - msg->buf;
427 msg->hdr = (struct radius_hdr *) msg->buf;
428 /* adjust attr pointers to match with the new buffer */
429 for (i = 0; i < msg->attr_used; i++)
430 msg->attrs[i] = (struct radius_attr_hdr *)
431 (((u8 *) msg->attrs[i]) + diff);
432 os_memset(msg->buf + msg->buf_size, 0, nlen - msg->buf_size);
433 msg->buf_size = nlen;
436 attr = (struct radius_attr_hdr *) (msg->buf + msg->buf_used);
438 attr->length = sizeof(*attr) + data_len;
440 os_memcpy(attr + 1, data, data_len);
442 msg->buf_used += sizeof(*attr) + data_len;
444 if (radius_msg_add_attr_to_array(msg, attr))
451 struct radius_msg *radius_msg_parse(const u8 *data, size_t len)
453 struct radius_msg *msg;
454 struct radius_hdr *hdr;
455 struct radius_attr_hdr *attr;
457 unsigned char *pos, *end;
459 if (data == NULL || len < sizeof(*hdr))
462 hdr = (struct radius_hdr *) data;
464 msg_len = ntohs(hdr->length);
465 if (msg_len < sizeof(*hdr) || msg_len > len) {
466 printf("Invalid RADIUS message length\n");
471 printf("Ignored %lu extra bytes after RADIUS message\n",
472 (unsigned long) len - msg_len);
475 msg = os_malloc(sizeof(*msg));
479 if (radius_msg_initialize(msg, msg_len)) {
484 os_memcpy(msg->buf, data, msg_len);
485 msg->buf_size = msg->buf_used = msg_len;
487 /* parse attributes */
488 pos = (unsigned char *) (msg->hdr + 1);
489 end = msg->buf + msg->buf_used;
491 if ((size_t) (end - pos) < sizeof(*attr))
494 attr = (struct radius_attr_hdr *) pos;
496 if (pos + attr->length > end || attr->length < sizeof(*attr))
499 /* TODO: check that attr->length is suitable for attr->type */
501 if (radius_msg_add_attr_to_array(msg, attr))
510 radius_msg_free(msg);
516 int radius_msg_add_eap(struct radius_msg *msg, const u8 *data, size_t data_len)
518 const u8 *pos = data;
519 size_t left = data_len;
523 if (left > RADIUS_MAX_ATTR_LEN)
524 len = RADIUS_MAX_ATTR_LEN;
528 if (!radius_msg_add_attr(msg, RADIUS_ATTR_EAP_MESSAGE,
540 u8 *radius_msg_get_eap(struct radius_msg *msg, size_t *eap_len)
549 for (i = 0; i < msg->attr_used; i++) {
550 if (msg->attrs[i]->type == RADIUS_ATTR_EAP_MESSAGE)
551 len += msg->attrs[i]->length -
552 sizeof(struct radius_attr_hdr);
558 eap = os_malloc(len);
563 for (i = 0; i < msg->attr_used; i++) {
564 if (msg->attrs[i]->type == RADIUS_ATTR_EAP_MESSAGE) {
565 struct radius_attr_hdr *attr = msg->attrs[i];
566 int flen = attr->length - sizeof(*attr);
567 os_memcpy(pos, attr + 1, flen);
579 int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
580 size_t secret_len, const u8 *req_auth)
582 u8 auth[MD5_MAC_LEN], orig[MD5_MAC_LEN];
583 u8 orig_authenticator[16];
584 struct radius_attr_hdr *attr = NULL;
587 for (i = 0; i < msg->attr_used; i++) {
588 if (msg->attrs[i]->type == RADIUS_ATTR_MESSAGE_AUTHENTICATOR) {
590 printf("Multiple Message-Authenticator "
591 "attributes in RADIUS message\n");
594 attr = msg->attrs[i];
599 printf("No Message-Authenticator attribute found\n");
603 os_memcpy(orig, attr + 1, MD5_MAC_LEN);
604 os_memset(attr + 1, 0, MD5_MAC_LEN);
606 os_memcpy(orig_authenticator, msg->hdr->authenticator,
607 sizeof(orig_authenticator));
608 os_memcpy(msg->hdr->authenticator, req_auth,
609 sizeof(msg->hdr->authenticator));
611 hmac_md5(secret, secret_len, msg->buf, msg->buf_used, auth);
612 os_memcpy(attr + 1, orig, MD5_MAC_LEN);
614 os_memcpy(msg->hdr->authenticator, orig_authenticator,
615 sizeof(orig_authenticator));
618 if (os_memcmp(orig, auth, MD5_MAC_LEN) != 0) {
619 printf("Invalid Message-Authenticator!\n");
627 int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
628 size_t secret_len, struct radius_msg *sent_msg, int auth)
632 u8 hash[MD5_MAC_LEN];
634 if (sent_msg == NULL) {
635 printf("No matching Access-Request message found\n");
640 radius_msg_verify_msg_auth(msg, secret, secret_len,
641 sent_msg->hdr->authenticator)) {
645 /* ResponseAuth = MD5(Code+ID+Length+RequestAuth+Attributes+Secret) */
646 addr[0] = (u8 *) msg->hdr;
648 addr[1] = sent_msg->hdr->authenticator;
649 len[1] = MD5_MAC_LEN;
650 addr[2] = (u8 *) (msg->hdr + 1);
651 len[2] = msg->buf_used - sizeof(*msg->hdr);
654 md5_vector(4, addr, len, hash);
655 if (os_memcmp(hash, msg->hdr->authenticator, MD5_MAC_LEN) != 0) {
656 printf("Response Authenticator invalid!\n");
664 int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
667 struct radius_attr_hdr *attr = NULL;
670 for (i = 0; i < src->attr_used; i++) {
671 if (src->attrs[i]->type == type) {
672 attr = src->attrs[i];
680 if (!radius_msg_add_attr(dst, type, (u8 *) (attr + 1),
681 attr->length - sizeof(*attr)))
688 /* Create Request Authenticator. The value should be unique over the lifetime
689 * of the shared secret between authenticator and authentication server.
690 * Use one-way MD5 hash calculated from current timestamp and some data given
692 void radius_msg_make_authenticator(struct radius_msg *msg,
693 const u8 *data, size_t len)
702 addr[0] = (u8 *) &tv;
703 elen[0] = sizeof(tv);
708 md5_vector(3, addr, elen, msg->hdr->authenticator);
712 /* Get Vendor-specific RADIUS Attribute from a parsed RADIUS message.
713 * Returns the Attribute payload and sets alen to indicate the length of the
714 * payload if a vendor attribute with subtype is found, otherwise returns NULL.
715 * The returned payload is allocated with os_malloc() and caller must free it
716 * by calling os_free().
718 static u8 *radius_msg_get_vendor_attr(struct radius_msg *msg, u32 vendor,
719 u8 subtype, size_t *alen)
727 for (i = 0; i < msg->attr_used; i++) {
728 struct radius_attr_hdr *attr = msg->attrs[i];
731 struct radius_attr_vendor *vhdr;
733 if (attr->type != RADIUS_ATTR_VENDOR_SPECIFIC)
736 left = attr->length - sizeof(*attr);
740 pos = (u8 *) (attr + 1);
742 os_memcpy(&vendor_id, pos, 4);
746 if (ntohl(vendor_id) != vendor)
749 while (left >= sizeof(*vhdr)) {
750 vhdr = (struct radius_attr_vendor *) pos;
751 if (vhdr->vendor_length > left ||
752 vhdr->vendor_length < sizeof(*vhdr)) {
756 if (vhdr->vendor_type != subtype) {
757 pos += vhdr->vendor_length;
758 left -= vhdr->vendor_length;
762 len = vhdr->vendor_length - sizeof(*vhdr);
763 data = os_malloc(len);
766 os_memcpy(data, pos + sizeof(*vhdr), len);
777 static u8 * decrypt_ms_key(const u8 *key, size_t len,
778 const u8 *req_authenticator,
779 const u8 *secret, size_t secret_len, size_t *reslen)
781 u8 *plain, *ppos, *res;
784 u8 hash[MD5_MAC_LEN];
789 /* key: 16-bit salt followed by encrypted key info */
797 printf("Invalid ms key len %lu\n", (unsigned long) left);
802 ppos = plain = os_malloc(plen);
807 /* b(1) = MD5(Secret + Request-Authenticator + Salt)
808 * b(i) = MD5(Secret + c(i - 1)) for i > 1 */
811 elen[0] = secret_len;
813 addr[1] = req_authenticator;
814 elen[1] = MD5_MAC_LEN;
816 elen[2] = 2; /* Salt */
818 addr[1] = pos - MD5_MAC_LEN;
819 elen[1] = MD5_MAC_LEN;
821 md5_vector(first ? 3 : 2, addr, elen, hash);
824 for (i = 0; i < MD5_MAC_LEN; i++)
825 *ppos++ = *pos++ ^ hash[i];
829 if (plain[0] > plen - 1) {
830 printf("Failed to decrypt MPPE key\n");
835 res = os_malloc(plain[0]);
840 os_memcpy(res, plain + 1, plain[0]);
848 static void encrypt_ms_key(const u8 *key, size_t key_len, u16 salt,
849 const u8 *req_authenticator,
850 const u8 *secret, size_t secret_len,
851 u8 *ebuf, size_t *elen)
853 int i, len, first = 1;
854 u8 hash[MD5_MAC_LEN], saltbuf[2], *pos;
858 saltbuf[0] = salt >> 8;
863 len = (len & 0xf0) + 16;
865 os_memset(ebuf, 0, len);
867 os_memcpy(ebuf + 1, key, key_len);
873 /* b(1) = MD5(Secret + Request-Authenticator + Salt)
874 * b(i) = MD5(Secret + c(i - 1)) for i > 1 */
876 _len[0] = secret_len;
878 addr[1] = req_authenticator;
879 _len[1] = MD5_MAC_LEN;
881 _len[2] = sizeof(saltbuf);
883 addr[1] = pos - MD5_MAC_LEN;
884 _len[1] = MD5_MAC_LEN;
886 md5_vector(first ? 3 : 2, addr, _len, hash);
889 for (i = 0; i < MD5_MAC_LEN; i++)
897 struct radius_ms_mppe_keys *
898 radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
899 u8 *secret, size_t secret_len)
903 struct radius_ms_mppe_keys *keys;
905 if (msg == NULL || sent_msg == NULL)
908 keys = wpa_zalloc(sizeof(*keys));
912 key = radius_msg_get_vendor_attr(msg, RADIUS_VENDOR_ID_MICROSOFT,
913 RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY,
916 keys->send = decrypt_ms_key(key, keylen,
917 sent_msg->hdr->authenticator,
923 key = radius_msg_get_vendor_attr(msg, RADIUS_VENDOR_ID_MICROSOFT,
924 RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY,
927 keys->recv = decrypt_ms_key(key, keylen,
928 sent_msg->hdr->authenticator,
938 struct radius_ms_mppe_keys *
939 radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
940 u8 *secret, size_t secret_len)
944 struct radius_ms_mppe_keys *keys;
946 if (msg == NULL || sent_msg == NULL)
949 keys = wpa_zalloc(sizeof(*keys));
953 key = radius_msg_get_vendor_attr(msg, RADIUS_VENDOR_ID_CISCO,
954 RADIUS_CISCO_AV_PAIR, &keylen);
955 if (key && keylen == 51 &&
956 os_memcmp(key, "leap:session-key=", 17) == 0) {
957 keys->recv = decrypt_ms_key(key + 17, keylen - 17,
958 sent_msg->hdr->authenticator,
968 int radius_msg_add_mppe_keys(struct radius_msg *msg,
969 const u8 *req_authenticator,
970 const u8 *secret, size_t secret_len,
971 const u8 *send_key, size_t send_key_len,
972 const u8 *recv_key, size_t recv_key_len)
974 struct radius_attr_hdr *attr;
975 u32 vendor_id = htonl(RADIUS_VENDOR_ID_MICROSOFT);
977 struct radius_attr_vendor *vhdr;
983 hlen = sizeof(vendor_id) + sizeof(*vhdr) + 2;
985 /* MS-MPPE-Send-Key */
986 buf = os_malloc(hlen + send_key_len + 16);
991 os_memcpy(pos, &vendor_id, sizeof(vendor_id));
992 pos += sizeof(vendor_id);
993 vhdr = (struct radius_attr_vendor *) pos;
994 vhdr->vendor_type = RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY;
995 pos = (u8 *) (vhdr + 1);
996 salt = os_random() | 0x8000;
999 encrypt_ms_key(send_key, send_key_len, salt, req_authenticator, secret,
1000 secret_len, pos, &elen);
1001 vhdr->vendor_length = hlen + elen - sizeof(vendor_id);
1003 attr = radius_msg_add_attr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1010 /* MS-MPPE-Recv-Key */
1011 buf = os_malloc(hlen + send_key_len + 16);
1016 os_memcpy(pos, &vendor_id, sizeof(vendor_id));
1017 pos += sizeof(vendor_id);
1018 vhdr = (struct radius_attr_vendor *) pos;
1019 vhdr->vendor_type = RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY;
1020 pos = (u8 *) (vhdr + 1);
1024 encrypt_ms_key(recv_key, recv_key_len, salt, req_authenticator, secret,
1025 secret_len, pos, &elen);
1026 vhdr->vendor_length = hlen + elen - sizeof(vendor_id);
1028 attr = radius_msg_add_attr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1039 /* Add User-Password attribute to a RADIUS message and encrypt it as specified
1040 * in RFC 2865, Chap. 5.2 */
1041 struct radius_attr_hdr *
1042 radius_msg_add_attr_user_password(struct radius_msg *msg,
1043 u8 *data, size_t data_len,
1044 u8 *secret, size_t secret_len)
1048 size_t buf_len, pos;
1056 os_memcpy(buf, data, data_len);
1059 padlen = data_len % 16;
1061 padlen = 16 - padlen;
1062 os_memset(buf + data_len, 0, padlen);
1067 len[0] = secret_len;
1068 addr[1] = msg->hdr->authenticator;
1070 md5_vector(2, addr, len, hash);
1072 for (i = 0; i < 16; i++)
1076 while (pos < buf_len) {
1078 len[0] = secret_len;
1079 addr[1] = &buf[pos - 16];
1081 md5_vector(2, addr, len, hash);
1083 for (i = 0; i < 16; i++)
1084 buf[pos + i] ^= hash[i];
1089 return radius_msg_add_attr(msg, RADIUS_ATTR_USER_PASSWORD,
1094 int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len)
1096 struct radius_attr_hdr *attr = NULL;
1099 for (i = 0; i < msg->attr_used; i++) {
1100 if (msg->attrs[i]->type == type) {
1101 attr = msg->attrs[i];
1109 dlen = attr->length - sizeof(*attr);
1111 os_memcpy(buf, (attr + 1), dlen > len ? len : dlen);
1116 int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
1117 size_t *len, const u8 *start)
1120 struct radius_attr_hdr *attr = NULL;
1122 for (i = 0; i < msg->attr_used; i++) {
1123 if (msg->attrs[i]->type == type &&
1124 (start == NULL || (u8 *) msg->attrs[i] > start)) {
1125 attr = msg->attrs[i];
1133 *buf = (u8 *) (attr + 1);
1134 *len = attr->length - sizeof(*attr);
1139 int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len)
1144 for (count = 0, i = 0; i < msg->attr_used; i++) {
1145 if (msg->attrs[i]->type == type &&
1146 msg->attrs[i]->length >=
1147 sizeof(struct radius_attr_hdr) + min_len)
1155 struct radius_tunnel_attrs {
1157 int type; /* Tunnel-Type */
1158 int medium_type; /* Tunnel-Medium-Type */
1164 * radius_msg_get_vlanid - Parse RADIUS attributes for VLAN tunnel information
1165 * @msg: RADIUS message
1166 * Returns: VLAN ID for the first tunnel configuration of -1 if none is found
1168 int radius_msg_get_vlanid(struct radius_msg *msg)
1170 struct radius_tunnel_attrs tunnel[RADIUS_TUNNEL_TAGS], *tun;
1172 struct radius_attr_hdr *attr = NULL;
1177 os_memset(&tunnel, 0, sizeof(tunnel));
1179 for (i = 0; i < msg->attr_used; i++) {
1180 attr = msg->attrs[i];
1181 data = (const u8 *) (attr + 1);
1182 dlen = attr->length - sizeof(*attr);
1183 if (attr->length < 3)
1185 if (data[0] >= RADIUS_TUNNEL_TAGS)
1188 tun = &tunnel[data[0]];
1190 switch (attr->type) {
1191 case RADIUS_ATTR_TUNNEL_TYPE:
1192 if (attr->length != 6)
1195 tun->type = (data[1] << 16) | (data[2] << 8) | data[3];
1197 case RADIUS_ATTR_TUNNEL_MEDIUM_TYPE:
1198 if (attr->length != 6)
1202 (data[1] << 16) | (data[2] << 8) | data[3];
1204 case RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID:
1205 if (data[0] < RADIUS_TUNNEL_TAGS) {
1209 if (dlen >= sizeof(buf))
1211 os_memcpy(buf, data, dlen);
1214 tun->vlanid = atoi(buf);
1219 for (i = 0; i < RADIUS_TUNNEL_TAGS; i++) {
1221 if (tun->tag_used &&
1222 tun->type == RADIUS_TUNNEL_TYPE_VLAN &&
1223 tun->medium_type == RADIUS_TUNNEL_MEDIUM_TYPE_802 &&