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* hostapd / RADIUS message processing
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* Copyright (c) 2002-2007, 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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static struct radius_attr_hdr *
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radius_get_attr_hdr(struct radius_msg *msg, int idx)
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return (struct radius_attr_hdr *) (msg->buf + msg->attr_pos[idx]);
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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 = os_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_zalloc(RADIUS_DEFAULT_ATTR_COUNT * sizeof(*msg->attr_pos));
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if (msg->attr_pos == 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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msg->buf_size = msg->buf_used = 0;
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os_free(msg->attr_pos);
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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_REPLY_MESSAGE, "Reply-Message", RADIUS_ATTR_TEXT },
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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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struct radius_attr_hdr *attr = radius_get_attr_hdr(msg, i);
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radius_msg_dump_attr(attr);
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int radius_msg_finish(struct radius_msg *msg, u8 *secret, size_t secret_len)
295
u8 auth[MD5_MAC_LEN];
296
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 "
304
"Message-Authenticator\n");
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msg->hdr->length = htons(msg->buf_used);
308
hmac_md5(secret, secret_len, msg->buf, msg->buf_used,
311
msg->hdr->length = htons(msg->buf_used);
313
if (msg->buf_used > 0xffff) {
314
printf("WARNING: too long RADIUS message (%lu)\n",
315
(unsigned long) msg->buf_used);
322
int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
323
size_t secret_len, const u8 *req_authenticator)
325
u8 auth[MD5_MAC_LEN];
326
struct radius_attr_hdr *attr;
330
os_memset(auth, 0, MD5_MAC_LEN);
331
attr = radius_msg_add_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR,
334
printf("WARNING: Could not add Message-Authenticator\n");
337
msg->hdr->length = htons(msg->buf_used);
338
os_memcpy(msg->hdr->authenticator, req_authenticator,
339
sizeof(msg->hdr->authenticator));
340
hmac_md5(secret, secret_len, msg->buf, msg->buf_used,
343
/* ResponseAuth = MD5(Code+ID+Length+RequestAuth+Attributes+Secret) */
344
addr[0] = (u8 *) msg->hdr;
346
addr[1] = req_authenticator;
347
len[1] = MD5_MAC_LEN;
348
addr[2] = (u8 *) (msg->hdr + 1);
349
len[2] = msg->buf_used - sizeof(*msg->hdr);
352
md5_vector(4, addr, len, msg->hdr->authenticator);
354
if (msg->buf_used > 0xffff) {
355
printf("WARNING: too long RADIUS message (%lu)\n",
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(unsigned long) msg->buf_used);
363
void radius_msg_finish_acct(struct radius_msg *msg, u8 *secret,
369
msg->hdr->length = htons(msg->buf_used);
370
os_memset(msg->hdr->authenticator, 0, MD5_MAC_LEN);
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len[0] = msg->buf_used;
375
md5_vector(2, addr, len, msg->hdr->authenticator);
377
if (msg->buf_used > 0xffff) {
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printf("WARNING: too long RADIUS messages (%lu)\n",
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(unsigned long) msg->buf_used);
384
static int radius_msg_add_attr_to_array(struct radius_msg *msg,
385
struct radius_attr_hdr *attr)
387
if (msg->attr_used >= msg->attr_size) {
389
int nlen = msg->attr_size * 2;
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nattr_pos = os_realloc(msg->attr_pos,
392
nlen * sizeof(*msg->attr_pos));
393
if (nattr_pos == NULL)
396
msg->attr_pos = nattr_pos;
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msg->attr_size = nlen;
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msg->attr_pos[msg->attr_used++] = (unsigned char *) attr - msg->buf;
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struct radius_attr_hdr *radius_msg_add_attr(struct radius_msg *msg, u8 type,
407
const u8 *data, size_t data_len)
410
struct radius_attr_hdr *attr;
412
if (data_len > RADIUS_MAX_ATTR_LEN) {
413
printf("radius_msg_add_attr: too long attribute (%lu bytes)\n",
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(unsigned long) data_len);
418
buf_needed = msg->buf_used + sizeof(*attr) + data_len;
420
if (msg->buf_size < buf_needed) {
421
/* allocate more space for message buffer */
423
size_t nlen = msg->buf_size;
425
while (nlen < buf_needed)
427
nbuf = os_realloc(msg->buf, nlen);
431
msg->hdr = (struct radius_hdr *) msg->buf;
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;
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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))
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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)
544
struct radius_attr_hdr *attr;
550
for (i = 0; i < msg->attr_used; i++) {
551
attr = radius_get_attr_hdr(msg, i);
552
if (attr->type == RADIUS_ATTR_EAP_MESSAGE)
553
len += attr->length - sizeof(struct radius_attr_hdr);
559
eap = os_malloc(len);
564
for (i = 0; i < msg->attr_used; i++) {
565
attr = radius_get_attr_hdr(msg, i);
566
if (attr->type == RADIUS_ATTR_EAP_MESSAGE) {
567
int flen = attr->length - sizeof(*attr);
568
os_memcpy(pos, attr + 1, flen);
580
int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
581
size_t secret_len, const u8 *req_auth)
583
u8 auth[MD5_MAC_LEN], orig[MD5_MAC_LEN];
584
u8 orig_authenticator[16];
585
struct radius_attr_hdr *attr = NULL, *tmp;
588
for (i = 0; i < msg->attr_used; i++) {
589
tmp = radius_get_attr_hdr(msg, i);
590
if (tmp->type == RADIUS_ATTR_MESSAGE_AUTHENTICATOR) {
592
printf("Multiple Message-Authenticator "
593
"attributes in RADIUS message\n");
601
printf("No Message-Authenticator attribute found\n");
605
os_memcpy(orig, attr + 1, MD5_MAC_LEN);
606
os_memset(attr + 1, 0, MD5_MAC_LEN);
608
os_memcpy(orig_authenticator, msg->hdr->authenticator,
609
sizeof(orig_authenticator));
610
os_memcpy(msg->hdr->authenticator, req_auth,
611
sizeof(msg->hdr->authenticator));
613
hmac_md5(secret, secret_len, msg->buf, msg->buf_used, auth);
614
os_memcpy(attr + 1, orig, MD5_MAC_LEN);
616
os_memcpy(msg->hdr->authenticator, orig_authenticator,
617
sizeof(orig_authenticator));
620
if (os_memcmp(orig, auth, MD5_MAC_LEN) != 0) {
621
printf("Invalid Message-Authenticator!\n");
629
int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
630
size_t secret_len, struct radius_msg *sent_msg, int auth)
634
u8 hash[MD5_MAC_LEN];
636
if (sent_msg == NULL) {
637
printf("No matching Access-Request message found\n");
642
radius_msg_verify_msg_auth(msg, secret, secret_len,
643
sent_msg->hdr->authenticator)) {
647
/* ResponseAuth = MD5(Code+ID+Length+RequestAuth+Attributes+Secret) */
648
addr[0] = (u8 *) msg->hdr;
650
addr[1] = sent_msg->hdr->authenticator;
651
len[1] = MD5_MAC_LEN;
652
addr[2] = (u8 *) (msg->hdr + 1);
653
len[2] = msg->buf_used - sizeof(*msg->hdr);
656
md5_vector(4, addr, len, hash);
657
if (os_memcmp(hash, msg->hdr->authenticator, MD5_MAC_LEN) != 0) {
658
printf("Response Authenticator invalid!\n");
666
int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
669
struct radius_attr_hdr *attr = NULL, *tmp;
672
for (i = 0; i < src->attr_used; i++) {
673
tmp = radius_get_attr_hdr(src, i);
674
if (tmp->type == type) {
683
if (!radius_msg_add_attr(dst, type, (u8 *) (attr + 1),
684
attr->length - sizeof(*attr)))
691
/* Create Request Authenticator. The value should be unique over the lifetime
692
* of the shared secret between authenticator and authentication server.
693
* Use one-way MD5 hash calculated from current timestamp and some data given
695
void radius_msg_make_authenticator(struct radius_msg *msg,
696
const u8 *data, size_t len)
705
addr[0] = (u8 *) &tv;
706
elen[0] = sizeof(tv);
711
md5_vector(3, addr, elen, msg->hdr->authenticator);
715
/* Get Vendor-specific RADIUS Attribute from a parsed RADIUS message.
716
* Returns the Attribute payload and sets alen to indicate the length of the
717
* payload if a vendor attribute with subtype is found, otherwise returns NULL.
718
* The returned payload is allocated with os_malloc() and caller must free it
719
* by calling os_free().
721
static u8 *radius_msg_get_vendor_attr(struct radius_msg *msg, u32 vendor,
722
u8 subtype, size_t *alen)
730
for (i = 0; i < msg->attr_used; i++) {
731
struct radius_attr_hdr *attr = radius_get_attr_hdr(msg, i);
734
struct radius_attr_vendor *vhdr;
736
if (attr->type != RADIUS_ATTR_VENDOR_SPECIFIC)
739
left = attr->length - sizeof(*attr);
743
pos = (u8 *) (attr + 1);
745
os_memcpy(&vendor_id, pos, 4);
749
if (ntohl(vendor_id) != vendor)
752
while (left >= sizeof(*vhdr)) {
753
vhdr = (struct radius_attr_vendor *) pos;
754
if (vhdr->vendor_length > left ||
755
vhdr->vendor_length < sizeof(*vhdr)) {
759
if (vhdr->vendor_type != subtype) {
760
pos += vhdr->vendor_length;
761
left -= vhdr->vendor_length;
765
len = vhdr->vendor_length - sizeof(*vhdr);
766
data = os_malloc(len);
769
os_memcpy(data, pos + sizeof(*vhdr), len);
780
static u8 * decrypt_ms_key(const u8 *key, size_t len,
781
const u8 *req_authenticator,
782
const u8 *secret, size_t secret_len, size_t *reslen)
784
u8 *plain, *ppos, *res;
787
u8 hash[MD5_MAC_LEN];
792
/* key: 16-bit salt followed by encrypted key info */
800
printf("Invalid ms key len %lu\n", (unsigned long) left);
805
ppos = plain = os_malloc(plen);
810
/* b(1) = MD5(Secret + Request-Authenticator + Salt)
811
* b(i) = MD5(Secret + c(i - 1)) for i > 1 */
814
elen[0] = secret_len;
816
addr[1] = req_authenticator;
817
elen[1] = MD5_MAC_LEN;
819
elen[2] = 2; /* Salt */
821
addr[1] = pos - MD5_MAC_LEN;
822
elen[1] = MD5_MAC_LEN;
824
md5_vector(first ? 3 : 2, addr, elen, hash);
827
for (i = 0; i < MD5_MAC_LEN; i++)
828
*ppos++ = *pos++ ^ hash[i];
832
if (plain[0] > plen - 1) {
833
printf("Failed to decrypt MPPE key\n");
838
res = os_malloc(plain[0]);
843
os_memcpy(res, plain + 1, plain[0]);
851
static void encrypt_ms_key(const u8 *key, size_t key_len, u16 salt,
852
const u8 *req_authenticator,
853
const u8 *secret, size_t secret_len,
854
u8 *ebuf, size_t *elen)
856
int i, len, first = 1;
857
u8 hash[MD5_MAC_LEN], saltbuf[2], *pos;
861
WPA_PUT_BE16(saltbuf, salt);
865
len = (len & 0xf0) + 16;
867
os_memset(ebuf, 0, len);
869
os_memcpy(ebuf + 1, key, key_len);
875
/* b(1) = MD5(Secret + Request-Authenticator + Salt)
876
* b(i) = MD5(Secret + c(i - 1)) for i > 1 */
878
_len[0] = secret_len;
880
addr[1] = req_authenticator;
881
_len[1] = MD5_MAC_LEN;
883
_len[2] = sizeof(saltbuf);
885
addr[1] = pos - MD5_MAC_LEN;
886
_len[1] = MD5_MAC_LEN;
888
md5_vector(first ? 3 : 2, addr, _len, hash);
891
for (i = 0; i < MD5_MAC_LEN; i++)
899
struct radius_ms_mppe_keys *
900
radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
901
u8 *secret, size_t secret_len)
905
struct radius_ms_mppe_keys *keys;
907
if (msg == NULL || sent_msg == NULL)
910
keys = os_zalloc(sizeof(*keys));
914
key = radius_msg_get_vendor_attr(msg, RADIUS_VENDOR_ID_MICROSOFT,
915
RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY,
918
keys->send = decrypt_ms_key(key, keylen,
919
sent_msg->hdr->authenticator,
925
key = radius_msg_get_vendor_attr(msg, RADIUS_VENDOR_ID_MICROSOFT,
926
RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY,
929
keys->recv = decrypt_ms_key(key, keylen,
930
sent_msg->hdr->authenticator,
940
struct radius_ms_mppe_keys *
941
radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
942
u8 *secret, size_t secret_len)
946
struct radius_ms_mppe_keys *keys;
948
if (msg == NULL || sent_msg == NULL)
951
keys = os_zalloc(sizeof(*keys));
955
key = radius_msg_get_vendor_attr(msg, RADIUS_VENDOR_ID_CISCO,
956
RADIUS_CISCO_AV_PAIR, &keylen);
957
if (key && keylen == 51 &&
958
os_memcmp(key, "leap:session-key=", 17) == 0) {
959
keys->recv = decrypt_ms_key(key + 17, keylen - 17,
960
sent_msg->hdr->authenticator,
970
int radius_msg_add_mppe_keys(struct radius_msg *msg,
971
const u8 *req_authenticator,
972
const u8 *secret, size_t secret_len,
973
const u8 *send_key, size_t send_key_len,
974
const u8 *recv_key, size_t recv_key_len)
976
struct radius_attr_hdr *attr;
977
u32 vendor_id = htonl(RADIUS_VENDOR_ID_MICROSOFT);
979
struct radius_attr_vendor *vhdr;
985
hlen = sizeof(vendor_id) + sizeof(*vhdr) + 2;
987
/* MS-MPPE-Send-Key */
988
buf = os_malloc(hlen + send_key_len + 16);
993
os_memcpy(pos, &vendor_id, sizeof(vendor_id));
994
pos += sizeof(vendor_id);
995
vhdr = (struct radius_attr_vendor *) pos;
996
vhdr->vendor_type = RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY;
997
pos = (u8 *) (vhdr + 1);
998
salt = os_random() | 0x8000;
999
WPA_PUT_BE16(pos, salt);
1001
encrypt_ms_key(send_key, send_key_len, salt, req_authenticator, secret,
1002
secret_len, pos, &elen);
1003
vhdr->vendor_length = hlen + elen - sizeof(vendor_id);
1005
attr = radius_msg_add_attr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1012
/* MS-MPPE-Recv-Key */
1013
buf = os_malloc(hlen + send_key_len + 16);
1018
os_memcpy(pos, &vendor_id, sizeof(vendor_id));
1019
pos += sizeof(vendor_id);
1020
vhdr = (struct radius_attr_vendor *) pos;
1021
vhdr->vendor_type = RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY;
1022
pos = (u8 *) (vhdr + 1);
1024
WPA_PUT_BE16(pos, salt);
1026
encrypt_ms_key(recv_key, recv_key_len, salt, req_authenticator, secret,
1027
secret_len, pos, &elen);
1028
vhdr->vendor_length = hlen + elen - sizeof(vendor_id);
1030
attr = radius_msg_add_attr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1041
/* Add User-Password attribute to a RADIUS message and encrypt it as specified
1042
* in RFC 2865, Chap. 5.2 */
1043
struct radius_attr_hdr *
1044
radius_msg_add_attr_user_password(struct radius_msg *msg,
1045
u8 *data, size_t data_len,
1046
u8 *secret, size_t secret_len)
1050
size_t buf_len, pos;
1058
os_memcpy(buf, data, data_len);
1061
padlen = data_len % 16;
1063
padlen = 16 - padlen;
1064
os_memset(buf + data_len, 0, padlen);
1069
len[0] = secret_len;
1070
addr[1] = msg->hdr->authenticator;
1072
md5_vector(2, addr, len, hash);
1074
for (i = 0; i < 16; i++)
1078
while (pos < buf_len) {
1080
len[0] = secret_len;
1081
addr[1] = &buf[pos - 16];
1083
md5_vector(2, addr, len, hash);
1085
for (i = 0; i < 16; i++)
1086
buf[pos + i] ^= hash[i];
1091
return radius_msg_add_attr(msg, RADIUS_ATTR_USER_PASSWORD,
1096
int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len)
1098
struct radius_attr_hdr *attr = NULL, *tmp;
1101
for (i = 0; i < msg->attr_used; i++) {
1102
tmp = radius_get_attr_hdr(msg, i);
1103
if (tmp->type == type) {
1112
dlen = attr->length - sizeof(*attr);
1114
os_memcpy(buf, (attr + 1), dlen > len ? len : dlen);
1119
int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
1120
size_t *len, const u8 *start)
1123
struct radius_attr_hdr *attr = NULL, *tmp;
1125
for (i = 0; i < msg->attr_used; i++) {
1126
tmp = radius_get_attr_hdr(msg, i);
1127
if (tmp->type == type &&
1128
(start == NULL || (u8 *) tmp > start)) {
1137
*buf = (u8 *) (attr + 1);
1138
*len = attr->length - sizeof(*attr);
1143
int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len)
1148
for (count = 0, i = 0; i < msg->attr_used; i++) {
1149
struct radius_attr_hdr *attr = radius_get_attr_hdr(msg, i);
1150
if (attr->type == type &&
1151
attr->length >= sizeof(struct radius_attr_hdr) + min_len)
1159
struct radius_tunnel_attrs {
1161
int type; /* Tunnel-Type */
1162
int medium_type; /* Tunnel-Medium-Type */
1168
* radius_msg_get_vlanid - Parse RADIUS attributes for VLAN tunnel information
1169
* @msg: RADIUS message
1170
* Returns: VLAN ID for the first tunnel configuration of -1 if none is found
1172
int radius_msg_get_vlanid(struct radius_msg *msg)
1174
struct radius_tunnel_attrs tunnel[RADIUS_TUNNEL_TAGS], *tun;
1176
struct radius_attr_hdr *attr = NULL;
1181
os_memset(&tunnel, 0, sizeof(tunnel));
1183
for (i = 0; i < msg->attr_used; i++) {
1184
attr = radius_get_attr_hdr(msg, i);
1185
data = (const u8 *) (attr + 1);
1186
dlen = attr->length - sizeof(*attr);
1187
if (attr->length < 3)
1189
if (data[0] >= RADIUS_TUNNEL_TAGS)
1192
tun = &tunnel[data[0]];
1194
switch (attr->type) {
1195
case RADIUS_ATTR_TUNNEL_TYPE:
1196
if (attr->length != 6)
1199
tun->type = WPA_GET_BE24(data + 1);
1201
case RADIUS_ATTR_TUNNEL_MEDIUM_TYPE:
1202
if (attr->length != 6)
1205
tun->medium_type = WPA_GET_BE24(data + 1);
1207
case RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID:
1208
if (data[0] < RADIUS_TUNNEL_TAGS) {
1212
if (dlen >= sizeof(buf))
1214
os_memcpy(buf, data, dlen);
1217
tun->vlanid = atoi(buf);
1222
for (i = 0; i < RADIUS_TUNNEL_TAGS; i++) {
1224
if (tun->tag_used &&
1225
tun->type == RADIUS_TUNNEL_TYPE_VLAN &&
1226
tun->medium_type == RADIUS_TUNNEL_MEDIUM_TYPE_802 &&
added
removed
src/radius/radius.c
