/*
* RADIUS message processing
- * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2002-2009, 2011-2014, Jouni Malinen <j@w1.fi>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "utils/includes.h"
static int radius_msg_initialize(struct radius_msg *msg)
{
- msg->attr_pos =
- os_zalloc(RADIUS_DEFAULT_ATTR_COUNT * sizeof(*msg->attr_pos));
+ msg->attr_pos = os_calloc(RADIUS_DEFAULT_ATTR_COUNT,
+ sizeof(*msg->attr_pos));
if (msg->attr_pos == NULL)
return -1;
case RADIUS_CODE_STATUS_SERVER: return "Status-Server";
case RADIUS_CODE_STATUS_CLIENT: return "Status-Client";
case RADIUS_CODE_RESERVED: return "Reserved";
+ case RADIUS_CODE_DISCONNECT_REQUEST: return "Disconnect-Request";
+ case RADIUS_CODE_DISCONNECT_ACK: return "Disconnect-ACK";
+ case RADIUS_CODE_DISCONNECT_NAK: return "Disconnect-NAK";
+ case RADIUS_CODE_COA_REQUEST: return "CoA-Request";
+ case RADIUS_CODE_COA_ACK: return "CoA-ACK";
+ case RADIUS_CODE_COA_NAK: return "CoA-NAK";
default: return "?Unknown?";
}
}
} data_type;
};
-static struct radius_attr_type radius_attrs[] =
+static const struct radius_attr_type radius_attrs[] =
{
{ RADIUS_ATTR_USER_NAME, "User-Name", RADIUS_ATTR_TEXT },
{ RADIUS_ATTR_USER_PASSWORD, "User-Password", RADIUS_ATTR_UNDIST },
{ RADIUS_ATTR_TUNNEL_TYPE, "Tunnel-Type", RADIUS_ATTR_HEXDUMP },
{ RADIUS_ATTR_TUNNEL_MEDIUM_TYPE, "Tunnel-Medium-Type",
RADIUS_ATTR_HEXDUMP },
+ { RADIUS_ATTR_TUNNEL_PASSWORD, "Tunnel-Password",
+ RADIUS_ATTR_UNDIST },
{ RADIUS_ATTR_CONNECT_INFO, "Connect-Info", RADIUS_ATTR_TEXT },
{ RADIUS_ATTR_EAP_MESSAGE, "EAP-Message", RADIUS_ATTR_UNDIST },
{ RADIUS_ATTR_MESSAGE_AUTHENTICATOR, "Message-Authenticator",
RADIUS_ATTR_HEXDUMP },
{ RADIUS_ATTR_ACCT_INTERIM_INTERVAL, "Acct-Interim-Interval",
RADIUS_ATTR_INT32 },
- { RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, "Chargable-User-Identity",
+ { RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, "Chargeable-User-Identity",
RADIUS_ATTR_TEXT },
{ RADIUS_ATTR_NAS_IPV6_ADDRESS, "NAS-IPv6-Address", RADIUS_ATTR_IPV6 },
+ { RADIUS_ATTR_ERROR_CAUSE, "Error-Cause", RADIUS_ATTR_INT32 },
+ { RADIUS_ATTR_EAP_KEY_NAME, "EAP-Key-Name", RADIUS_ATTR_HEXDUMP },
+ { RADIUS_ATTR_OPERATOR_NAME, "Operator-Name", RADIUS_ATTR_TEXT },
+ { RADIUS_ATTR_LOCATION_INFO, "Location-Information",
+ RADIUS_ATTR_HEXDUMP },
+ { RADIUS_ATTR_LOCATION_DATA, "Location-Data", RADIUS_ATTR_HEXDUMP },
+ { RADIUS_ATTR_BASIC_LOCATION_POLICY_RULES,
+ "Basic-Location-Policy-Rules", RADIUS_ATTR_HEXDUMP },
+ { RADIUS_ATTR_EXTENDED_LOCATION_POLICY_RULES,
+ "Extended-Location-Policy-Rules", RADIUS_ATTR_HEXDUMP },
+ { RADIUS_ATTR_LOCATION_CAPABLE, "Location-Capable", RADIUS_ATTR_INT32 },
+ { RADIUS_ATTR_REQUESTED_LOCATION_INFO, "Requested-Location-Info",
+ RADIUS_ATTR_INT32 },
+ { RADIUS_ATTR_MOBILITY_DOMAIN_ID, "Mobility-Domain-Id",
+ RADIUS_ATTR_INT32 },
+ { RADIUS_ATTR_WLAN_HESSID, "WLAN-HESSID", RADIUS_ATTR_TEXT },
+ { RADIUS_ATTR_WLAN_PAIRWISE_CIPHER, "WLAN-Pairwise-Cipher",
+ RADIUS_ATTR_HEXDUMP },
+ { RADIUS_ATTR_WLAN_GROUP_CIPHER, "WLAN-Group-Cipher",
+ RADIUS_ATTR_HEXDUMP },
+ { RADIUS_ATTR_WLAN_AKM_SUITE, "WLAN-AKM-Suite",
+ RADIUS_ATTR_HEXDUMP },
+ { RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, "WLAN-Group-Mgmt-Pairwise-Cipher",
+ RADIUS_ATTR_HEXDUMP },
};
-#define RADIUS_ATTRS (sizeof(radius_attrs) / sizeof(radius_attrs[0]))
+#define RADIUS_ATTRS ARRAY_SIZE(radius_attrs)
-static struct radius_attr_type *radius_get_attr_type(u8 type)
+static const struct radius_attr_type *radius_get_attr_type(u8 type)
{
size_t i;
}
-static void print_char(char c)
-{
- if (c >= 32 && c < 127)
- printf("%c", c);
- else
- printf("<%02x>", c);
-}
-
-
static void radius_msg_dump_attr(struct radius_attr_hdr *hdr)
{
- struct radius_attr_type *attr;
- int i, len;
+ const struct radius_attr_type *attr;
+ int len;
unsigned char *pos;
+ char buf[1000];
attr = radius_get_attr_type(hdr->type);
- printf(" Attribute %d (%s) length=%d\n",
- hdr->type, attr ? attr->name : "?Unknown?", hdr->length);
+ wpa_printf(MSG_INFO, " Attribute %d (%s) length=%d",
+ hdr->type, attr ? attr->name : "?Unknown?", hdr->length);
- if (attr == NULL)
+ if (attr == NULL || hdr->length < sizeof(struct radius_attr_hdr))
return;
len = hdr->length - sizeof(struct radius_attr_hdr);
switch (attr->data_type) {
case RADIUS_ATTR_TEXT:
- printf(" Value: '");
- for (i = 0; i < len; i++)
- print_char(pos[i]);
- printf("'\n");
+ printf_encode(buf, sizeof(buf), pos, len);
+ wpa_printf(MSG_INFO, " Value: '%s'", buf);
break;
case RADIUS_ATTR_IP:
if (len == 4) {
struct in_addr addr;
os_memcpy(&addr, pos, 4);
- printf(" Value: %s\n", inet_ntoa(addr));
- } else
- printf(" Invalid IP address length %d\n", len);
+ wpa_printf(MSG_INFO, " Value: %s",
+ inet_ntoa(addr));
+ } else {
+ wpa_printf(MSG_INFO, " Invalid IP address length %d",
+ len);
+ }
break;
#ifdef CONFIG_IPV6
case RADIUS_ATTR_IPV6:
if (len == 16) {
- char buf[128];
const char *atxt;
struct in6_addr *addr = (struct in6_addr *) pos;
atxt = inet_ntop(AF_INET6, addr, buf, sizeof(buf));
- printf(" Value: %s\n", atxt ? atxt : "?");
- } else
- printf(" Invalid IPv6 address length %d\n", len);
+ wpa_printf(MSG_INFO, " Value: %s",
+ atxt ? atxt : "?");
+ } else {
+ wpa_printf(MSG_INFO, " Invalid IPv6 address length %d",
+ len);
+ }
break;
#endif /* CONFIG_IPV6 */
case RADIUS_ATTR_HEXDUMP:
case RADIUS_ATTR_UNDIST:
- printf(" Value:");
- for (i = 0; i < len; i++)
- printf(" %02x", pos[i]);
- printf("\n");
+ wpa_snprintf_hex(buf, sizeof(buf), pos, len);
+ wpa_printf(MSG_INFO, " Value: %s", buf);
break;
case RADIUS_ATTR_INT32:
if (len == 4)
- printf(" Value: %u\n", WPA_GET_BE32(pos));
+ wpa_printf(MSG_INFO, " Value: %u",
+ WPA_GET_BE32(pos));
else
- printf(" Invalid INT32 length %d\n", len);
+ wpa_printf(MSG_INFO, " Invalid INT32 length %d",
+ len);
break;
default:
{
size_t i;
- printf("RADIUS message: code=%d (%s) identifier=%d length=%d\n",
- msg->hdr->code, radius_code_string(msg->hdr->code),
- msg->hdr->identifier, ntohs(msg->hdr->length));
+ wpa_printf(MSG_INFO, "RADIUS message: code=%d (%s) identifier=%d length=%d",
+ msg->hdr->code, radius_code_string(msg->hdr->code),
+ msg->hdr->identifier, be_to_host16(msg->hdr->length));
for (i = 0; i < msg->attr_used; i++) {
struct radius_attr_hdr *attr = radius_get_attr_hdr(msg, i);
"Message-Authenticator");
return -1;
}
- msg->hdr->length = htons(wpabuf_len(msg->buf));
+ msg->hdr->length = host_to_be16(wpabuf_len(msg->buf));
hmac_md5(secret, secret_len, wpabuf_head(msg->buf),
wpabuf_len(msg->buf), (u8 *) (attr + 1));
} else
- msg->hdr->length = htons(wpabuf_len(msg->buf));
+ msg->hdr->length = host_to_be16(wpabuf_len(msg->buf));
if (wpabuf_len(msg->buf) > 0xffff) {
wpa_printf(MSG_WARNING, "RADIUS: Too long message (%lu)",
attr = radius_msg_add_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR,
auth, MD5_MAC_LEN);
if (attr == NULL) {
- printf("WARNING: Could not add Message-Authenticator\n");
+ wpa_printf(MSG_ERROR, "WARNING: Could not add Message-Authenticator");
return -1;
}
- msg->hdr->length = htons(wpabuf_len(msg->buf));
+ msg->hdr->length = host_to_be16(wpabuf_len(msg->buf));
os_memcpy(msg->hdr->authenticator, req_authenticator,
sizeof(msg->hdr->authenticator));
hmac_md5(secret, secret_len, wpabuf_head(msg->buf),
}
+int radius_msg_finish_das_resp(struct radius_msg *msg, const u8 *secret,
+ size_t secret_len,
+ const struct radius_hdr *req_hdr)
+{
+ const u8 *addr[2];
+ size_t len[2];
+ u8 auth[MD5_MAC_LEN];
+ struct radius_attr_hdr *attr;
+
+ os_memset(auth, 0, MD5_MAC_LEN);
+ attr = radius_msg_add_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR,
+ auth, MD5_MAC_LEN);
+ if (attr == NULL) {
+ wpa_printf(MSG_WARNING, "Could not add Message-Authenticator");
+ return -1;
+ }
+
+ msg->hdr->length = host_to_be16(wpabuf_len(msg->buf));
+ os_memcpy(msg->hdr->authenticator, req_hdr->authenticator, 16);
+ hmac_md5(secret, secret_len, wpabuf_head(msg->buf),
+ wpabuf_len(msg->buf), (u8 *) (attr + 1));
+
+ /* ResponseAuth = MD5(Code+ID+Length+RequestAuth+Attributes+Secret) */
+ addr[0] = wpabuf_head_u8(msg->buf);
+ len[0] = wpabuf_len(msg->buf);
+ addr[1] = secret;
+ len[1] = secret_len;
+ if (md5_vector(2, addr, len, msg->hdr->authenticator) < 0)
+ return -1;
+
+ if (wpabuf_len(msg->buf) > 0xffff) {
+ wpa_printf(MSG_WARNING, "RADIUS: Too long message (%lu)",
+ (unsigned long) wpabuf_len(msg->buf));
+ return -1;
+ }
+ return 0;
+}
+
+
void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
size_t secret_len)
{
const u8 *addr[2];
size_t len[2];
- msg->hdr->length = htons(wpabuf_len(msg->buf));
+ msg->hdr->length = host_to_be16(wpabuf_len(msg->buf));
os_memset(msg->hdr->authenticator, 0, MD5_MAC_LEN);
addr[0] = wpabuf_head(msg->buf);
len[0] = wpabuf_len(msg->buf);
}
+void radius_msg_finish_acct_resp(struct radius_msg *msg, const u8 *secret,
+ size_t secret_len, const u8 *req_authenticator)
+{
+ const u8 *addr[2];
+ size_t len[2];
+
+ msg->hdr->length = host_to_be16(wpabuf_len(msg->buf));
+ os_memcpy(msg->hdr->authenticator, req_authenticator, MD5_MAC_LEN);
+ addr[0] = wpabuf_head(msg->buf);
+ len[0] = wpabuf_len(msg->buf);
+ addr[1] = secret;
+ len[1] = secret_len;
+ md5_vector(2, addr, len, msg->hdr->authenticator);
+
+ if (wpabuf_len(msg->buf) > 0xffff) {
+ wpa_printf(MSG_WARNING, "RADIUS: Too long messages (%lu)",
+ (unsigned long) wpabuf_len(msg->buf));
+ }
+}
+
+
+int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
+ size_t secret_len)
+{
+ const u8 *addr[4];
+ size_t len[4];
+ u8 zero[MD5_MAC_LEN];
+ u8 hash[MD5_MAC_LEN];
+
+ os_memset(zero, 0, sizeof(zero));
+ addr[0] = (u8 *) msg->hdr;
+ len[0] = sizeof(struct radius_hdr) - MD5_MAC_LEN;
+ addr[1] = zero;
+ len[1] = MD5_MAC_LEN;
+ addr[2] = (u8 *) (msg->hdr + 1);
+ len[2] = wpabuf_len(msg->buf) - sizeof(struct radius_hdr);
+ addr[3] = secret;
+ len[3] = secret_len;
+ md5_vector(4, addr, len, hash);
+ return os_memcmp_const(msg->hdr->authenticator, hash, MD5_MAC_LEN) != 0;
+}
+
+
+int radius_msg_verify_das_req(struct radius_msg *msg, const u8 *secret,
+ size_t secret_len)
+{
+ const u8 *addr[4];
+ size_t len[4];
+ u8 zero[MD5_MAC_LEN];
+ u8 hash[MD5_MAC_LEN];
+ u8 auth[MD5_MAC_LEN], orig[MD5_MAC_LEN];
+ u8 orig_authenticator[16];
+
+ struct radius_attr_hdr *attr = NULL, *tmp;
+ size_t i;
+
+ os_memset(zero, 0, sizeof(zero));
+ addr[0] = (u8 *) msg->hdr;
+ len[0] = sizeof(struct radius_hdr) - MD5_MAC_LEN;
+ addr[1] = zero;
+ len[1] = MD5_MAC_LEN;
+ addr[2] = (u8 *) (msg->hdr + 1);
+ len[2] = wpabuf_len(msg->buf) - sizeof(struct radius_hdr);
+ addr[3] = secret;
+ len[3] = secret_len;
+ md5_vector(4, addr, len, hash);
+ if (os_memcmp_const(msg->hdr->authenticator, hash, MD5_MAC_LEN) != 0)
+ return 1;
+
+ for (i = 0; i < msg->attr_used; i++) {
+ tmp = radius_get_attr_hdr(msg, i);
+ if (tmp->type == RADIUS_ATTR_MESSAGE_AUTHENTICATOR) {
+ if (attr != NULL) {
+ wpa_printf(MSG_WARNING, "Multiple "
+ "Message-Authenticator attributes "
+ "in RADIUS message");
+ return 1;
+ }
+ attr = tmp;
+ }
+ }
+
+ if (attr == NULL) {
+ /* Message-Authenticator is MAY; not required */
+ return 0;
+ }
+
+ os_memcpy(orig, attr + 1, MD5_MAC_LEN);
+ os_memset(attr + 1, 0, MD5_MAC_LEN);
+ os_memcpy(orig_authenticator, msg->hdr->authenticator,
+ sizeof(orig_authenticator));
+ os_memset(msg->hdr->authenticator, 0,
+ sizeof(msg->hdr->authenticator));
+ hmac_md5(secret, secret_len, wpabuf_head(msg->buf),
+ wpabuf_len(msg->buf), auth);
+ os_memcpy(attr + 1, orig, MD5_MAC_LEN);
+ os_memcpy(msg->hdr->authenticator, orig_authenticator,
+ sizeof(orig_authenticator));
+
+ return os_memcmp_const(orig, auth, MD5_MAC_LEN) != 0;
+}
+
+
static int radius_msg_add_attr_to_array(struct radius_msg *msg,
struct radius_attr_hdr *attr)
{
size_t *nattr_pos;
int nlen = msg->attr_size * 2;
- nattr_pos = os_realloc(msg->attr_pos,
- nlen * sizeof(*msg->attr_pos));
+ nattr_pos = os_realloc_array(msg->attr_pos, nlen,
+ sizeof(*msg->attr_pos));
if (nattr_pos == NULL)
return -1;
struct radius_attr_hdr *attr;
if (data_len > RADIUS_MAX_ATTR_LEN) {
- printf("radius_msg_add_attr: too long attribute (%lu bytes)\n",
+ wpa_printf(MSG_ERROR, "radius_msg_add_attr: too long attribute (%lu bytes)",
(unsigned long) data_len);
return NULL;
}
hdr = (struct radius_hdr *) data;
- msg_len = ntohs(hdr->length);
+ msg_len = be_to_host16(hdr->length);
if (msg_len < sizeof(*hdr) || msg_len > len) {
wpa_printf(MSG_INFO, "RADIUS: Invalid message length");
return NULL;
}
-u8 *radius_msg_get_eap(struct radius_msg *msg, size_t *eap_len)
+struct wpabuf * radius_msg_get_eap(struct radius_msg *msg)
{
- u8 *eap, *pos;
+ struct wpabuf *eap;
size_t len, i;
struct radius_attr_hdr *attr;
len = 0;
for (i = 0; i < msg->attr_used; i++) {
attr = radius_get_attr_hdr(msg, i);
- if (attr->type == RADIUS_ATTR_EAP_MESSAGE)
+ if (attr->type == RADIUS_ATTR_EAP_MESSAGE &&
+ attr->length > sizeof(struct radius_attr_hdr))
len += attr->length - sizeof(struct radius_attr_hdr);
}
if (len == 0)
return NULL;
- eap = os_malloc(len);
+ eap = wpabuf_alloc(len);
if (eap == NULL)
return NULL;
- pos = eap;
for (i = 0; i < msg->attr_used; i++) {
attr = radius_get_attr_hdr(msg, i);
- if (attr->type == RADIUS_ATTR_EAP_MESSAGE) {
+ if (attr->type == RADIUS_ATTR_EAP_MESSAGE &&
+ attr->length > sizeof(struct radius_attr_hdr)) {
int flen = attr->length - sizeof(*attr);
- os_memcpy(pos, attr + 1, flen);
- pos += flen;
+ wpabuf_put_data(eap, attr + 1, flen);
}
}
- if (eap_len)
- *eap_len = len;
-
return eap;
}
tmp = radius_get_attr_hdr(msg, i);
if (tmp->type == RADIUS_ATTR_MESSAGE_AUTHENTICATOR) {
if (attr != NULL) {
- printf("Multiple Message-Authenticator "
- "attributes in RADIUS message\n");
+ wpa_printf(MSG_INFO, "Multiple Message-Authenticator attributes in RADIUS message");
return 1;
}
attr = tmp;
}
if (attr == NULL) {
- printf("No Message-Authenticator attribute found\n");
+ wpa_printf(MSG_INFO, "No Message-Authenticator attribute found");
return 1;
}
sizeof(orig_authenticator));
}
- if (os_memcmp(orig, auth, MD5_MAC_LEN) != 0) {
- printf("Invalid Message-Authenticator!\n");
+ if (os_memcmp_const(orig, auth, MD5_MAC_LEN) != 0) {
+ wpa_printf(MSG_INFO, "Invalid Message-Authenticator!");
return 1;
}
u8 hash[MD5_MAC_LEN];
if (sent_msg == NULL) {
- printf("No matching Access-Request message found\n");
+ wpa_printf(MSG_INFO, "No matching Access-Request message found");
return 1;
}
addr[3] = secret;
len[3] = secret_len;
md5_vector(4, addr, len, hash);
- if (os_memcmp(hash, msg->hdr->authenticator, MD5_MAC_LEN) != 0) {
- printf("Response Authenticator invalid!\n");
+ if (os_memcmp_const(hash, msg->hdr->authenticator, MD5_MAC_LEN) != 0) {
+ wpa_printf(MSG_INFO, "Response Authenticator invalid!");
return 1;
}
for (i = 0; i < src->attr_used; i++) {
attr = radius_get_attr_hdr(src, i);
- if (attr->type == type) {
+ if (attr->type == type && attr->length >= sizeof(*attr)) {
if (!radius_msg_add_attr(dst, type, (u8 *) (attr + 1),
attr->length - sizeof(*attr)))
return -1;
u32 vendor_id;
struct radius_attr_vendor *vhdr;
- if (attr->type != RADIUS_ATTR_VENDOR_SPECIFIC)
+ if (attr->type != RADIUS_ATTR_VENDOR_SPECIFIC ||
+ attr->length < sizeof(*attr))
continue;
left = attr->length - sizeof(*attr);
vhdr = (struct radius_attr_vendor *) pos;
if (vhdr->vendor_length > left ||
vhdr->vendor_length < sizeof(*vhdr)) {
- left = 0;
break;
}
if (vhdr->vendor_type != subtype) {
/* key: 16-bit salt followed by encrypted key info */
- if (len < 2 + 16)
+ if (len < 2 + 16) {
+ wpa_printf(MSG_DEBUG, "RADIUS: %s: Len is too small: %d",
+ __func__, (int) len);
return NULL;
+ }
pos = key + 2;
left = len - 2;
if (left % 16) {
- printf("Invalid ms key len %lu\n", (unsigned long) left);
+ wpa_printf(MSG_INFO, "RADIUS: Invalid ms key len %lu",
+ (unsigned long) left);
return NULL;
}
}
if (plain[0] == 0 || plain[0] > plen - 1) {
- printf("Failed to decrypt MPPE key\n");
+ wpa_printf(MSG_INFO, "RADIUS: Failed to decrypt MPPE key");
os_free(plain);
return NULL;
}
sent_msg->hdr->authenticator,
secret, secret_len,
&keys->send_len);
+ if (!keys->send) {
+ wpa_printf(MSG_DEBUG,
+ "RADIUS: Failed to decrypt send key");
+ }
os_free(key);
}
sent_msg->hdr->authenticator,
secret, secret_len,
&keys->recv_len);
+ if (!keys->recv) {
+ wpa_printf(MSG_DEBUG,
+ "RADIUS: Failed to decrypt recv key");
+ }
os_free(key);
}
}
/* MS-MPPE-Recv-Key */
- buf = os_malloc(hlen + send_key_len + 16);
+ buf = os_malloc(hlen + recv_key_len + 16);
if (buf == NULL) {
return 0;
}
}
-/* Add User-Password attribute to a RADIUS message and encrypt it as specified
- * in RFC 2865, Chap. 5.2 */
-struct radius_attr_hdr *
-radius_msg_add_attr_user_password(struct radius_msg *msg,
- const u8 *data, size_t data_len,
- const u8 *secret, size_t secret_len)
+int radius_msg_add_wfa(struct radius_msg *msg, u8 subtype, const u8 *data,
+ size_t len)
{
- u8 buf[128];
- int padlen, i;
- size_t buf_len, pos;
+ struct radius_attr_hdr *attr;
+ u8 *buf, *pos;
+ size_t alen;
+
+ alen = 4 + 2 + len;
+ buf = os_malloc(alen);
+ if (buf == NULL)
+ return 0;
+ pos = buf;
+ WPA_PUT_BE32(pos, RADIUS_VENDOR_ID_WFA);
+ pos += 4;
+ *pos++ = subtype;
+ *pos++ = 2 + len;
+ os_memcpy(pos, data, len);
+ attr = radius_msg_add_attr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
+ buf, alen);
+ os_free(buf);
+ if (attr == NULL)
+ return 0;
+
+ return 1;
+}
+
+
+int radius_user_password_hide(struct radius_msg *msg,
+ const u8 *data, size_t data_len,
+ const u8 *secret, size_t secret_len,
+ u8 *buf, size_t buf_len)
+{
+ size_t padlen, i, pos;
const u8 *addr[2];
size_t len[2];
u8 hash[16];
- if (data_len > 128)
- return NULL;
+ if (data_len + 16 > buf_len)
+ return -1;
os_memcpy(buf, data, data_len);
- buf_len = data_len;
padlen = data_len % 16;
- if (padlen) {
+ if (padlen && data_len < buf_len) {
padlen = 16 - padlen;
os_memset(buf + data_len, 0, padlen);
- buf_len += padlen;
+ buf_len = data_len + padlen;
+ } else {
+ buf_len = data_len;
}
addr[0] = secret;
pos += 16;
}
+ return buf_len;
+}
+
+
+/* Add User-Password attribute to a RADIUS message and encrypt it as specified
+ * in RFC 2865, Chap. 5.2 */
+struct radius_attr_hdr *
+radius_msg_add_attr_user_password(struct radius_msg *msg,
+ const u8 *data, size_t data_len,
+ const u8 *secret, size_t secret_len)
+{
+ u8 buf[128];
+ int res;
+
+ res = radius_user_password_hide(msg, data, data_len,
+ secret, secret_len, buf, sizeof(buf));
+ if (res < 0)
+ return NULL;
+
return radius_msg_add_attr(msg, RADIUS_ATTR_USER_PASSWORD,
- buf, buf_len);
+ buf, res);
}
}
}
- if (!attr)
+ if (!attr || attr->length < sizeof(*attr))
return -1;
dlen = attr->length - sizeof(*attr);
}
}
- if (!attr)
+ if (!attr || attr->length < sizeof(*attr))
return -1;
*buf = (u8 *) (attr + 1);
/**
* radius_msg_get_vlanid - Parse RADIUS attributes for VLAN tunnel information
* @msg: RADIUS message
- * Returns: VLAN ID for the first tunnel configuration of -1 if none is found
+ * Returns: VLAN ID for the first tunnel configuration or 0 if none is found
*/
int radius_msg_get_vlanid(struct radius_msg *msg)
{
for (i = 0; i < msg->attr_used; i++) {
attr = radius_get_attr_hdr(msg, i);
+ if (attr->length < sizeof(*attr))
+ return -1;
data = (const u8 *) (attr + 1);
dlen = attr->length - sizeof(*attr);
if (attr->length < 3)
return tun->vlanid;
}
- return -1;
+ return 0;
+}
+
+
+/**
+ * radius_msg_get_tunnel_password - Parse RADIUS attribute Tunnel-Password
+ * @msg: Received RADIUS message
+ * @keylen: Length of returned password
+ * @secret: RADIUS shared secret
+ * @secret_len: Length of secret
+ * @sent_msg: Sent RADIUS message
+ * @n: Number of password attribute to return (starting with 0)
+ * Returns: Pointer to n-th password (free with os_free) or %NULL
+ */
+char * radius_msg_get_tunnel_password(struct radius_msg *msg, int *keylen,
+ const u8 *secret, size_t secret_len,
+ struct radius_msg *sent_msg, size_t n)
+{
+ u8 *buf = NULL;
+ size_t buflen;
+ const u8 *salt;
+ u8 *str;
+ const u8 *addr[3];
+ size_t len[3];
+ u8 hash[16];
+ u8 *pos;
+ size_t i, j = 0;
+ struct radius_attr_hdr *attr;
+ const u8 *data;
+ size_t dlen;
+ const u8 *fdata = NULL; /* points to found item */
+ size_t fdlen = -1;
+ char *ret = NULL;
+
+ /* find n-th valid Tunnel-Password attribute */
+ for (i = 0; i < msg->attr_used; i++) {
+ attr = radius_get_attr_hdr(msg, i);
+ if (attr == NULL ||
+ attr->type != RADIUS_ATTR_TUNNEL_PASSWORD) {
+ continue;
+ }
+ if (attr->length <= 5)
+ continue;
+ data = (const u8 *) (attr + 1);
+ dlen = attr->length - sizeof(*attr);
+ if (dlen <= 3 || dlen % 16 != 3)
+ continue;
+ j++;
+ if (j <= n)
+ continue;
+
+ fdata = data;
+ fdlen = dlen;
+ break;
+ }
+ if (fdata == NULL)
+ goto out;
+
+ /* alloc writable memory for decryption */
+ buf = os_malloc(fdlen);
+ if (buf == NULL)
+ goto out;
+ os_memcpy(buf, fdata, fdlen);
+ buflen = fdlen;
+
+ /* init pointers */
+ salt = buf + 1;
+ str = buf + 3;
+
+ /* decrypt blocks */
+ pos = buf + buflen - 16; /* last block */
+ while (pos >= str + 16) { /* all but the first block */
+ addr[0] = secret;
+ len[0] = secret_len;
+ addr[1] = pos - 16;
+ len[1] = 16;
+ md5_vector(2, addr, len, hash);
+
+ for (i = 0; i < 16; i++)
+ pos[i] ^= hash[i];
+
+ pos -= 16;
+ }
+
+ /* decrypt first block */
+ if (str != pos)
+ goto out;
+ addr[0] = secret;
+ len[0] = secret_len;
+ addr[1] = sent_msg->hdr->authenticator;
+ len[1] = 16;
+ addr[2] = salt;
+ len[2] = 2;
+ md5_vector(3, addr, len, hash);
+
+ for (i = 0; i < 16; i++)
+ pos[i] ^= hash[i];
+
+ /* derive plaintext length from first subfield */
+ *keylen = (unsigned char) str[0];
+ if ((u8 *) (str + *keylen) >= (u8 *) (buf + buflen)) {
+ /* decryption error - invalid key length */
+ goto out;
+ }
+ if (*keylen == 0) {
+ /* empty password */
+ goto out;
+ }
+
+ /* copy passphrase into new buffer */
+ ret = os_malloc(*keylen);
+ if (ret)
+ os_memcpy(ret, str + 1, *keylen);
+
+out:
+ /* return new buffer */
+ os_free(buf);
+ return ret;
}
if (src->attr == NULL)
return 0;
- dst->attr = os_zalloc(src->count * sizeof(struct radius_attr_data));
+ dst->attr = os_calloc(src->count, sizeof(struct radius_attr_data));
if (dst->attr == NULL)
return -1;
return 0;
}
+
+
+u8 radius_msg_find_unlisted_attr(struct radius_msg *msg, u8 *attrs)
+{
+ size_t i, j;
+ struct radius_attr_hdr *attr;
+
+ for (i = 0; i < msg->attr_used; i++) {
+ attr = radius_get_attr_hdr(msg, i);
+
+ for (j = 0; attrs[j]; j++) {
+ if (attr->type == attrs[j])
+ break;
+ }
+
+ if (attrs[j] == 0)
+ return attr->type; /* unlisted attr */
+ }
+
+ return 0;
+}
projects / mech_eap.git / blobdiff