* EAP peer method: EAP-PEAP (draft-josefsson-pppext-eap-tls-eap-10.txt)
* Copyright (c) 2004-2008, 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 "includes.h"
/* Maximum supported PEAP version
* 0 = Microsoft's PEAP version 0; draft-kamath-pppext-peapv0-00.txt
* 1 = draft-josefsson-ppext-eap-tls-eap-05.txt
- * 2 = draft-josefsson-ppext-eap-tls-eap-10.txt
*/
#define EAP_PEAP_VERSION 1
int resuming; /* starting a resumed session */
int reauth; /* reauthentication */
u8 *key_data;
+ u8 *session_id;
+ size_t id_len;
struct wpabuf *pending_phase2_req;
enum { NO_BINDING, OPTIONAL_BINDING, REQUIRE_BINDING } crypto_binding;
data->phase2_type.vendor = EAP_VENDOR_IETF;
data->phase2_type.method = EAP_TYPE_NONE;
- if (eap_peer_tls_ssl_init(sm, &data->ssl, config)) {
+ if (eap_peer_tls_ssl_init(sm, &data->ssl, config, EAP_TYPE_PEAP)) {
wpa_printf(MSG_INFO, "EAP-PEAP: Failed to initialize SSL.");
eap_peap_deinit(sm, data);
return NULL;
}
+static void eap_peap_free_key(struct eap_peap_data *data)
+{
+ if (data->key_data) {
+ bin_clear_free(data->key_data, EAP_TLS_KEY_LEN);
+ data->key_data = NULL;
+ }
+}
+
+
static void eap_peap_deinit(struct eap_sm *sm, void *priv)
{
struct eap_peap_data *data = priv;
data->phase2_method->deinit(sm, data->phase2_priv);
os_free(data->phase2_types);
eap_peer_tls_ssl_deinit(sm, &data->ssl);
- os_free(data->key_data);
+ eap_peap_free_key(data);
+ os_free(data->session_id);
wpabuf_free(data->pending_phase2_req);
os_free(data);
}
* @nak_type: TLV type (EAP_TLV_*)
* Returns: Buffer to the allocated EAP-TLV NAK message or %NULL on failure
*
- * This funtion builds an EAP-TLV NAK message. The caller is responsible for
+ * This function builds an EAP-TLV NAK message. The caller is responsible for
* freeing the returned buffer.
*/
static struct wpabuf * eap_tlv_build_nak(int id, u16 nak_type)
* in the end of the label just before ISK; is that just a typo?)
*/
wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TempKey", tk, 40);
- peap_prfplus(data->peap_version, tk, 40, "Inner Methods Compound Keys",
- isk, sizeof(isk), imck, sizeof(imck));
+ if (peap_prfplus(data->peap_version, tk, 40,
+ "Inner Methods Compound Keys",
+ isk, sizeof(isk), imck, sizeof(imck)) < 0)
+ return -1;
wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IMCK (IPMKj)",
imck, sizeof(imck));
len[1] = 1;
tlv_type = EAP_TLV_CRYPTO_BINDING_TLV;
- if (data->peap_version >= 2)
- tlv_type |= EAP_TLV_TYPE_MANDATORY;
wpabuf_put_be16(buf, tlv_type);
wpabuf_put_be16(buf, 56);
* @status: Status (EAP_TLV_RESULT_SUCCESS or EAP_TLV_RESULT_FAILURE)
* Returns: Buffer to the allocated EAP-TLV Result message or %NULL on failure
*
- * This funtion builds an EAP-TLV Result message. The caller is responsible for
- * freeing the returned buffer.
+ * This function builds an EAP-TLV Result message. The caller is responsible
+ * for freeing the returned buffer.
*/
static struct wpabuf * eap_tlv_build_result(struct eap_sm *sm,
struct eap_peap_data *data,
buf, sizeof(buf));
hmac_sha1(data->cmk, 20, buf, sizeof(buf), mac);
- if (os_memcmp(mac, pos, SHA1_MAC_LEN) != 0) {
+ if (os_memcmp_const(mac, pos, SHA1_MAC_LEN) != 0) {
wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid Compound_MAC in "
"cryptobinding TLV");
wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Received MAC",
}
-static struct wpabuf * eap_peapv2_tlv_eap_payload(struct wpabuf *buf)
-{
- struct wpabuf *e;
- struct eap_tlv_hdr *tlv;
-
- if (buf == NULL)
- return NULL;
-
- /* Encapsulate EAP packet in EAP-Payload TLV */
- wpa_printf(MSG_DEBUG, "EAP-PEAPv2: Add EAP-Payload TLV");
- e = wpabuf_alloc(sizeof(*tlv) + wpabuf_len(buf));
- if (e == NULL) {
- wpa_printf(MSG_DEBUG, "EAP-PEAPv2: Failed to allocate memory "
- "for TLV encapsulation");
- wpabuf_free(buf);
- return NULL;
- }
- tlv = wpabuf_put(e, sizeof(*tlv));
- tlv->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
- EAP_TLV_EAP_PAYLOAD_TLV);
- tlv->length = host_to_be16(wpabuf_len(buf));
- wpabuf_put_buf(e, buf);
- wpabuf_free(buf);
- return e;
-}
-
-
static int eap_peap_phase2_request(struct eap_sm *sm,
struct eap_peap_data *data,
struct eap_method_ret *ret,
in_decrypted = nmsg;
}
- if (data->peap_version >= 2) {
- struct eap_tlv_hdr *tlv;
- struct wpabuf *nmsg;
-
- if (wpabuf_len(in_decrypted) < sizeof(*tlv) + sizeof(*hdr)) {
- wpa_printf(MSG_INFO, "EAP-PEAPv2: Too short Phase 2 "
- "EAP TLV");
- wpabuf_free(in_decrypted);
- return 0;
- }
- tlv = wpabuf_mhead(in_decrypted);
- if ((be_to_host16(tlv->tlv_type) & 0x3fff) !=
- EAP_TLV_EAP_PAYLOAD_TLV) {
- wpa_printf(MSG_INFO, "EAP-PEAPv2: Not an EAP TLV");
- wpabuf_free(in_decrypted);
- return 0;
- }
- if (sizeof(*tlv) + be_to_host16(tlv->length) >
- wpabuf_len(in_decrypted)) {
- wpa_printf(MSG_INFO, "EAP-PEAPv2: Invalid EAP TLV "
- "length");
- wpabuf_free(in_decrypted);
- return 0;
- }
- hdr = (struct eap_hdr *) (tlv + 1);
- if (be_to_host16(hdr->length) > be_to_host16(tlv->length)) {
- wpa_printf(MSG_INFO, "EAP-PEAPv2: No room for full "
- "EAP packet in EAP TLV");
- wpabuf_free(in_decrypted);
- return 0;
- }
-
- nmsg = wpabuf_alloc(be_to_host16(hdr->length));
- if (nmsg == NULL) {
- wpabuf_free(in_decrypted);
- return 0;
- }
-
- wpabuf_put_data(nmsg, hdr, be_to_host16(hdr->length));
- wpabuf_free(in_decrypted);
- in_decrypted = nmsg;
- }
-
hdr = wpabuf_mhead(in_decrypted);
if (wpabuf_len(in_decrypted) < sizeof(*hdr)) {
wpa_printf(MSG_INFO, "EAP-PEAP: Too short Phase 2 "
wpa_hexdump_buf_key(MSG_DEBUG,
"EAP-PEAP: Encrypting Phase 2 data", resp);
/* PEAP version changes */
- if (data->peap_version >= 2) {
- resp = eap_peapv2_tlv_eap_payload(resp);
- if (resp == NULL)
- return -1;
- }
if (wpabuf_len(resp) >= 5 &&
wpabuf_head_u8(resp)[0] == EAP_CODE_RESPONSE &&
eap_get_type(resp) == EAP_TYPE_TLV)
struct wpabuf *resp;
const u8 *pos;
struct eap_peap_data *data = priv;
+ struct wpabuf msg;
pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_PEAP, ret,
reqData, &left, &flags);
* should always be, anyway */
}
+ wpabuf_set(&msg, pos, left);
+
resp = NULL;
if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
!data->resuming) {
- struct wpabuf msg;
- wpabuf_set(&msg, pos, left);
res = eap_peap_decrypt(sm, data, ret, req, &msg, &resp);
} else {
res = eap_peer_tls_process_helper(sm, &data->ssl,
EAP_TYPE_PEAP,
- data->peap_version, id, pos,
- left, &resp);
+ data->peap_version, id, &msg,
+ &resp);
+ if (res < 0) {
+ wpa_printf(MSG_DEBUG,
+ "EAP-PEAP: TLS processing failed");
+ ret->methodState = METHOD_DONE;
+ ret->decision = DECISION_FAIL;
+ return resp;
+ }
if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
char *label;
wpa_printf(MSG_DEBUG,
"EAP-PEAP: TLS done, proceed to Phase 2");
- os_free(data->key_data);
+ eap_peap_free_key(data);
/* draft-josefsson-ppext-eap-tls-eap-05.txt
* specifies that PEAPv1 would use "client PEAP
* encryption" as the label. However, most existing
* label, "client EAP encryption", instead. Use the old
* label by default, but allow it to be configured with
* phase1 parameter peaplabel=1. */
- if (data->peap_version > 1 || data->force_new_label)
+ if (data->force_new_label)
label = "client PEAP encryption";
else
label = "client EAP encryption";
"derive key");
}
+ os_free(data->session_id);
+ data->session_id =
+ eap_peer_tls_derive_session_id(sm, &data->ssl,
+ EAP_TYPE_PEAP,
+ &data->id_len);
+ if (data->session_id) {
+ wpa_hexdump(MSG_DEBUG,
+ "EAP-PEAP: Derived Session-Id",
+ data->session_id, data->id_len);
+ } else {
+ wpa_printf(MSG_ERROR, "EAP-PEAP: Failed to "
+ "derive Session-Id");
+ }
+
if (sm->workaround && data->resuming) {
/*
* At least few RADIUS servers (Aegis v1.1.6;
}
if (res == 2) {
- struct wpabuf msg;
/*
* Application data included in the handshake message.
*/
wpabuf_free(data->pending_phase2_req);
data->pending_phase2_req = resp;
resp = NULL;
- wpabuf_set(&msg, pos, left);
res = eap_peap_decrypt(sm, data, ret, req, &msg,
&resp);
}
static void * eap_peap_init_for_reauth(struct eap_sm *sm, void *priv)
{
struct eap_peap_data *data = priv;
- os_free(data->key_data);
- data->key_data = NULL;
+ eap_peap_free_key(data);
+ os_free(data->session_id);
+ data->session_id = NULL;
if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
os_free(data);
return NULL;
"EAP-PEAPv%d Phase2 method=%s\n",
data->peap_version,
data->phase2_method->name);
- if (ret < 0 || (size_t) ret >= buflen - len)
+ if (os_snprintf_error(buflen - len, ret))
return len;
len += ret;
}
* termination for this label while the one used for deriving
* IPMK|CMK did not use null termination.
*/
- peap_prfplus(data->peap_version, data->ipmk, 40,
- "Session Key Generating Function",
- (u8 *) "\00", 1, csk, sizeof(csk));
+ if (peap_prfplus(data->peap_version, data->ipmk, 40,
+ "Session Key Generating Function",
+ (u8 *) "\00", 1, csk, sizeof(csk)) < 0) {
+ os_free(key);
+ return NULL;
+ }
wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CSK", csk, sizeof(csk));
os_memcpy(key, csk, EAP_TLS_KEY_LEN);
wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Derived key",
}
+static u8 * eap_peap_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
+{
+ struct eap_peap_data *data = priv;
+ u8 *id;
+
+ if (data->session_id == NULL || !data->phase2_success)
+ return NULL;
+
+ id = os_malloc(data->id_len);
+ if (id == NULL)
+ return NULL;
+
+ *len = data->id_len;
+ os_memcpy(id, data->session_id, data->id_len);
+
+ return id;
+}
+
+
int eap_peer_peap_register(void)
{
struct eap_method *eap;
eap->has_reauth_data = eap_peap_has_reauth_data;
eap->deinit_for_reauth = eap_peap_deinit_for_reauth;
eap->init_for_reauth = eap_peap_init_for_reauth;
+ eap->getSessionId = eap_peap_get_session_id;
ret = eap_peer_method_register(eap);
if (ret)
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