2
* hostapd / RADIUS message processing
3
* Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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* Alternatively, this software may be distributed under the terms of BSD
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* See README and COPYING for more details.
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struct radius_msg *radius_msg_new(u8 code, u8 identifier)
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struct radius_msg *msg;
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msg = os_malloc(sizeof(*msg));
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if (radius_msg_initialize(msg, RADIUS_DEFAULT_MSG_SIZE)) {
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radius_msg_set_hdr(msg, code, identifier);
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int radius_msg_initialize(struct radius_msg *msg, size_t init_len)
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if (msg == NULL || init_len < sizeof(struct radius_hdr))
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os_memset(msg, 0, sizeof(*msg));
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msg->buf = wpa_zalloc(init_len);
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msg->buf_size = init_len;
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msg->hdr = (struct radius_hdr *) msg->buf;
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msg->buf_used = sizeof(*msg->hdr);
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os_malloc(RADIUS_DEFAULT_ATTR_COUNT * sizeof(*msg->attrs));
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if (msg->attrs == NULL) {
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msg->attr_size = RADIUS_DEFAULT_ATTR_COUNT;
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void radius_msg_set_hdr(struct radius_msg *msg, u8 code, u8 identifier)
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msg->hdr->code = code;
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msg->hdr->identifier = identifier;
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void radius_msg_free(struct radius_msg *msg)
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if (msg->buf != NULL) {
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msg->buf_size = msg->buf_used = 0;
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if (msg->attrs != NULL) {
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msg->attr_size = msg->attr_used = 0;
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static const char *radius_code_string(u8 code)
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case RADIUS_CODE_ACCESS_REQUEST: return "Access-Request";
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case RADIUS_CODE_ACCESS_ACCEPT: return "Access-Accept";
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case RADIUS_CODE_ACCESS_REJECT: return "Access-Reject";
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case RADIUS_CODE_ACCOUNTING_REQUEST: return "Accounting-Request";
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case RADIUS_CODE_ACCOUNTING_RESPONSE: return "Accounting-Response";
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case RADIUS_CODE_ACCESS_CHALLENGE: return "Access-Challenge";
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case RADIUS_CODE_STATUS_SERVER: return "Status-Server";
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case RADIUS_CODE_STATUS_CLIENT: return "Status-Client";
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case RADIUS_CODE_RESERVED: return "Reserved";
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default: return "?Unknown?";
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struct radius_attr_type {
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RADIUS_ATTR_UNDIST, RADIUS_ATTR_TEXT, RADIUS_ATTR_IP,
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RADIUS_ATTR_HEXDUMP, RADIUS_ATTR_INT32, RADIUS_ATTR_IPV6
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static struct radius_attr_type radius_attrs[] =
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{ RADIUS_ATTR_USER_NAME, "User-Name", RADIUS_ATTR_TEXT },
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{ RADIUS_ATTR_USER_PASSWORD, "User-Password", RADIUS_ATTR_UNDIST },
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{ RADIUS_ATTR_NAS_IP_ADDRESS, "NAS-IP-Address", RADIUS_ATTR_IP },
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{ RADIUS_ATTR_NAS_PORT, "NAS-Port", RADIUS_ATTR_INT32 },
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{ RADIUS_ATTR_FRAMED_MTU, "Framed-MTU", RADIUS_ATTR_INT32 },
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{ RADIUS_ATTR_STATE, "State", RADIUS_ATTR_UNDIST },
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{ RADIUS_ATTR_CLASS, "Class", RADIUS_ATTR_UNDIST },
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{ RADIUS_ATTR_VENDOR_SPECIFIC, "Vendor-Specific", RADIUS_ATTR_UNDIST },
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{ RADIUS_ATTR_SESSION_TIMEOUT, "Session-Timeout", RADIUS_ATTR_INT32 },
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{ RADIUS_ATTR_IDLE_TIMEOUT, "Idle-Timeout", RADIUS_ATTR_INT32 },
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{ RADIUS_ATTR_TERMINATION_ACTION, "Termination-Action",
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{ RADIUS_ATTR_CALLED_STATION_ID, "Called-Station-Id",
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{ RADIUS_ATTR_CALLING_STATION_ID, "Calling-Station-Id",
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{ RADIUS_ATTR_NAS_IDENTIFIER, "NAS-Identifier", RADIUS_ATTR_TEXT },
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{ RADIUS_ATTR_ACCT_STATUS_TYPE, "Acct-Status-Type",
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{ RADIUS_ATTR_ACCT_DELAY_TIME, "Acct-Delay-Time", RADIUS_ATTR_INT32 },
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{ RADIUS_ATTR_ACCT_INPUT_OCTETS, "Acct-Input-Octets",
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{ RADIUS_ATTR_ACCT_OUTPUT_OCTETS, "Acct-Output-Octets",
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{ RADIUS_ATTR_ACCT_SESSION_ID, "Acct-Session-Id", RADIUS_ATTR_TEXT },
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{ RADIUS_ATTR_ACCT_AUTHENTIC, "Acct-Authentic", RADIUS_ATTR_INT32 },
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{ RADIUS_ATTR_ACCT_SESSION_TIME, "Acct-Session-Time",
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{ RADIUS_ATTR_ACCT_INPUT_PACKETS, "Acct-Input-Packets",
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{ RADIUS_ATTR_ACCT_OUTPUT_PACKETS, "Acct-Output-Packets",
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{ RADIUS_ATTR_ACCT_TERMINATE_CAUSE, "Acct-Terminate-Cause",
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{ RADIUS_ATTR_ACCT_MULTI_SESSION_ID, "Acct-Multi-Session-Id",
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{ RADIUS_ATTR_ACCT_LINK_COUNT, "Acct-Link-Count", RADIUS_ATTR_INT32 },
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{ RADIUS_ATTR_ACCT_INPUT_GIGAWORDS, "Acct-Input-Gigawords",
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{ RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS, "Acct-Output-Gigawords",
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{ RADIUS_ATTR_EVENT_TIMESTAMP, "Event-Timestamp",
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{ RADIUS_ATTR_NAS_PORT_TYPE, "NAS-Port-Type", RADIUS_ATTR_INT32 },
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{ RADIUS_ATTR_TUNNEL_TYPE, "Tunnel-Type", RADIUS_ATTR_HEXDUMP },
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{ RADIUS_ATTR_TUNNEL_MEDIUM_TYPE, "Tunnel-Medium-Type",
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RADIUS_ATTR_HEXDUMP },
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{ RADIUS_ATTR_CONNECT_INFO, "Connect-Info", RADIUS_ATTR_TEXT },
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{ RADIUS_ATTR_EAP_MESSAGE, "EAP-Message", RADIUS_ATTR_UNDIST },
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{ RADIUS_ATTR_MESSAGE_AUTHENTICATOR, "Message-Authenticator",
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RADIUS_ATTR_UNDIST },
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{ RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID, "Tunnel-Private-Group-Id",
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RADIUS_ATTR_HEXDUMP },
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{ RADIUS_ATTR_ACCT_INTERIM_INTERVAL, "Acct-Interim-Interval",
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{ RADIUS_ATTR_NAS_IPV6_ADDRESS, "NAS-IPv6-Address", RADIUS_ATTR_IPV6 },
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#define RADIUS_ATTRS (sizeof(radius_attrs) / sizeof(radius_attrs[0]))
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static struct radius_attr_type *radius_get_attr_type(u8 type)
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for (i = 0; i < RADIUS_ATTRS; i++) {
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if (type == radius_attrs[i].type)
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return &radius_attrs[i];
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static void print_char(char c)
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if (c >= 32 && c < 127)
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static void radius_msg_dump_attr(struct radius_attr_hdr *hdr)
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struct radius_attr_type *attr;
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attr = radius_get_attr_type(hdr->type);
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printf(" Attribute %d (%s) length=%d\n",
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hdr->type, attr ? attr->name : "?Unknown?", hdr->length);
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len = hdr->length - sizeof(struct radius_attr_hdr);
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pos = (unsigned char *) (hdr + 1);
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switch (attr->data_type) {
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case RADIUS_ATTR_TEXT:
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for (i = 0; i < len; i++)
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struct in_addr *addr = (struct in_addr *) pos;
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printf(" Value: %s\n", inet_ntoa(*addr));
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printf(" Invalid IP address length %d\n", len);
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case RADIUS_ATTR_IPV6:
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struct in6_addr *addr = (struct in6_addr *) pos;
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atxt = inet_ntop(AF_INET6, addr, buf, sizeof(buf));
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printf(" Value: %s\n", atxt ? atxt : "?");
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printf(" Invalid IPv6 address length %d\n", len);
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#endif /* CONFIG_IPV6 */
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case RADIUS_ATTR_HEXDUMP:
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case RADIUS_ATTR_UNDIST:
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for (i = 0; i < len; i++)
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printf(" %02x", pos[i]);
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case RADIUS_ATTR_INT32:
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printf(" Value: %u\n", WPA_GET_BE32(pos));
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printf(" Invalid INT32 length %d\n", len);
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void radius_msg_dump(struct radius_msg *msg)
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printf("RADIUS message: code=%d (%s) identifier=%d length=%d\n",
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msg->hdr->code, radius_code_string(msg->hdr->code),
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msg->hdr->identifier, ntohs(msg->hdr->length));
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for (i = 0; i < msg->attr_used; i++) {
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radius_msg_dump_attr(msg->attrs[i]);
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int radius_msg_finish(struct radius_msg *msg, u8 *secret, size_t secret_len)
290
u8 auth[MD5_MAC_LEN];
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struct radius_attr_hdr *attr;
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os_memset(auth, 0, MD5_MAC_LEN);
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attr = radius_msg_add_attr(msg,
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RADIUS_ATTR_MESSAGE_AUTHENTICATOR,
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printf("WARNING: Could not add "
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"Message-Authenticator\n");
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msg->hdr->length = htons(msg->buf_used);
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hmac_md5(secret, secret_len, msg->buf, msg->buf_used,
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msg->hdr->length = htons(msg->buf_used);
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if (msg->buf_used > 0xffff) {
309
printf("WARNING: too long RADIUS message (%lu)\n",
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(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,
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printf("WARNING: Could not add Message-Authenticator\n");
332
msg->hdr->length = htons(msg->buf_used);
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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,
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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",
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(unsigned long) data_len);
412
buf_needed = msg->buf_used + sizeof(*attr) + data_len;
414
if (msg->buf_size < buf_needed) {
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/* 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;
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/* 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);
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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 &&