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-rw-r--r--src/eap_server/eap_server.c1347
1 files changed, 1347 insertions, 0 deletions
diff --git a/src/eap_server/eap_server.c b/src/eap_server/eap_server.c
new file mode 100644
index 0000000..6ac8aaa
--- /dev/null
+++ b/src/eap_server/eap_server.c
@@ -0,0 +1,1347 @@
+/*
+ * hostapd / EAP Full Authenticator state machine (RFC 4137)
+ * Copyright (c) 2004-2007, 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 state machine is based on the full authenticator state machine defined
+ * in RFC 4137. However, to support backend authentication in RADIUS
+ * authentication server functionality, parts of backend authenticator (also
+ * from RFC 4137) are mixed in. This functionality is enabled by setting
+ * backend_auth configuration variable to TRUE.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "eap_i.h"
+#include "state_machine.h"
+
+#define STATE_MACHINE_DATA struct eap_sm
+#define STATE_MACHINE_DEBUG_PREFIX "EAP"
+
+#define EAP_MAX_AUTH_ROUNDS 50
+
+static void eap_user_free(struct eap_user *user);
+
+
+/* EAP state machines are described in RFC 4137 */
+
+static int eap_sm_calculateTimeout(struct eap_sm *sm, int retransCount,
+ int eapSRTT, int eapRTTVAR,
+ int methodTimeout);
+static void eap_sm_parseEapResp(struct eap_sm *sm, const struct wpabuf *resp);
+static int eap_sm_getId(const struct wpabuf *data);
+static struct wpabuf * eap_sm_buildSuccess(struct eap_sm *sm, u8 id);
+static struct wpabuf * eap_sm_buildFailure(struct eap_sm *sm, u8 id);
+static int eap_sm_nextId(struct eap_sm *sm, int id);
+static void eap_sm_Policy_update(struct eap_sm *sm, const u8 *nak_list,
+ size_t len);
+static EapType eap_sm_Policy_getNextMethod(struct eap_sm *sm, int *vendor);
+static int eap_sm_Policy_getDecision(struct eap_sm *sm);
+static Boolean eap_sm_Policy_doPickUp(struct eap_sm *sm, EapType method);
+
+
+static int eap_copy_buf(struct wpabuf **dst, const struct wpabuf *src)
+{
+ if (src == NULL)
+ return -1;
+
+ wpabuf_free(*dst);
+ *dst = wpabuf_dup(src);
+ return *dst ? 0 : -1;
+}
+
+
+static int eap_copy_data(u8 **dst, size_t *dst_len,
+ const u8 *src, size_t src_len)
+{
+ if (src == NULL)
+ return -1;
+
+ os_free(*dst);
+ *dst = os_malloc(src_len);
+ if (*dst) {
+ os_memcpy(*dst, src, src_len);
+ *dst_len = src_len;
+ return 0;
+ } else {
+ *dst_len = 0;
+ return -1;
+ }
+}
+
+#define EAP_COPY(dst, src) \
+ eap_copy_data((dst), (dst ## Len), (src), (src ## Len))
+
+
+/**
+ * eap_user_get - Fetch user information from the database
+ * @sm: Pointer to EAP state machine allocated with eap_server_sm_init()
+ * @identity: Identity (User-Name) of the user
+ * @identity_len: Length of identity in bytes
+ * @phase2: 0 = EAP phase1 user, 1 = EAP phase2 (tunneled) user
+ * Returns: 0 on success, or -1 on failure
+ *
+ * This function is used to fetch user information for EAP. The user will be
+ * selected based on the specified identity. sm->user and
+ * sm->user_eap_method_index are updated for the new user when a matching user
+ * is found. sm->user can be used to get user information (e.g., password).
+ */
+int eap_user_get(struct eap_sm *sm, const u8 *identity, size_t identity_len,
+ int phase2)
+{
+ struct eap_user *user;
+
+ if (sm == NULL || sm->eapol_cb == NULL ||
+ sm->eapol_cb->get_eap_user == NULL)
+ return -1;
+
+ eap_user_free(sm->user);
+ sm->user = NULL;
+
+ user = os_zalloc(sizeof(*user));
+ if (user == NULL)
+ return -1;
+
+ if (sm->eapol_cb->get_eap_user(sm->eapol_ctx, identity,
+ identity_len, phase2, user) != 0) {
+ eap_user_free(user);
+ return -1;
+ }
+
+ sm->user = user;
+ sm->user_eap_method_index = 0;
+
+ return 0;
+}
+
+
+SM_STATE(EAP, DISABLED)
+{
+ SM_ENTRY(EAP, DISABLED);
+ sm->num_rounds = 0;
+}
+
+
+SM_STATE(EAP, INITIALIZE)
+{
+ SM_ENTRY(EAP, INITIALIZE);
+
+ sm->currentId = -1;
+ sm->eap_if.eapSuccess = FALSE;
+ sm->eap_if.eapFail = FALSE;
+ sm->eap_if.eapTimeout = FALSE;
+ os_free(sm->eap_if.eapKeyData);
+ sm->eap_if.eapKeyData = NULL;
+ sm->eap_if.eapKeyDataLen = 0;
+ sm->eap_if.eapKeyAvailable = FALSE;
+ sm->eap_if.eapRestart = FALSE;
+
+ /*
+ * This is not defined in RFC 4137, but method state needs to be
+ * reseted here so that it does not remain in success state when
+ * re-authentication starts.
+ */
+ if (sm->m && sm->eap_method_priv) {
+ sm->m->reset(sm, sm->eap_method_priv);
+ sm->eap_method_priv = NULL;
+ }
+ sm->m = NULL;
+ sm->user_eap_method_index = 0;
+
+ if (sm->backend_auth) {
+ sm->currentMethod = EAP_TYPE_NONE;
+ /* parse rxResp, respId, respMethod */
+ eap_sm_parseEapResp(sm, sm->eap_if.eapRespData);
+ if (sm->rxResp) {
+ sm->currentId = sm->respId;
+ }
+ }
+ sm->num_rounds = 0;
+ sm->method_pending = METHOD_PENDING_NONE;
+}
+
+
+SM_STATE(EAP, PICK_UP_METHOD)
+{
+ SM_ENTRY(EAP, PICK_UP_METHOD);
+
+ if (eap_sm_Policy_doPickUp(sm, sm->respMethod)) {
+ sm->currentMethod = sm->respMethod;
+ if (sm->m && sm->eap_method_priv) {
+ sm->m->reset(sm, sm->eap_method_priv);
+ sm->eap_method_priv = NULL;
+ }
+ sm->m = eap_server_get_eap_method(EAP_VENDOR_IETF,
+ sm->currentMethod);
+ if (sm->m && sm->m->initPickUp) {
+ sm->eap_method_priv = sm->m->initPickUp(sm);
+ if (sm->eap_method_priv == NULL) {
+ wpa_printf(MSG_DEBUG, "EAP: Failed to "
+ "initialize EAP method %d",
+ sm->currentMethod);
+ sm->m = NULL;
+ sm->currentMethod = EAP_TYPE_NONE;
+ }
+ } else {
+ sm->m = NULL;
+ sm->currentMethod = EAP_TYPE_NONE;
+ }
+ }
+}
+
+
+SM_STATE(EAP, IDLE)
+{
+ SM_ENTRY(EAP, IDLE);
+
+ sm->eap_if.retransWhile = eap_sm_calculateTimeout(
+ sm, sm->retransCount, sm->eap_if.eapSRTT, sm->eap_if.eapRTTVAR,
+ sm->methodTimeout);
+}
+
+
+SM_STATE(EAP, RETRANSMIT)
+{
+ SM_ENTRY(EAP, RETRANSMIT);
+
+ sm->retransCount++;
+ if (sm->retransCount <= sm->MaxRetrans && sm->lastReqData) {
+ if (eap_copy_buf(&sm->eap_if.eapReqData, sm->lastReqData) == 0)
+ sm->eap_if.eapReq = TRUE;
+ }
+}
+
+
+SM_STATE(EAP, RECEIVED)
+{
+ SM_ENTRY(EAP, RECEIVED);
+
+ /* parse rxResp, respId, respMethod */
+ eap_sm_parseEapResp(sm, sm->eap_if.eapRespData);
+ sm->num_rounds++;
+}
+
+
+SM_STATE(EAP, DISCARD)
+{
+ SM_ENTRY(EAP, DISCARD);
+ sm->eap_if.eapResp = FALSE;
+ sm->eap_if.eapNoReq = TRUE;
+}
+
+
+SM_STATE(EAP, SEND_REQUEST)
+{
+ SM_ENTRY(EAP, SEND_REQUEST);
+
+ sm->retransCount = 0;
+ if (sm->eap_if.eapReqData) {
+ if (eap_copy_buf(&sm->lastReqData, sm->eap_if.eapReqData) == 0)
+ {
+ sm->eap_if.eapResp = FALSE;
+ sm->eap_if.eapReq = TRUE;
+ } else {
+ sm->eap_if.eapResp = FALSE;
+ sm->eap_if.eapReq = FALSE;
+ }
+ } else {
+ wpa_printf(MSG_INFO, "EAP: SEND_REQUEST - no eapReqData");
+ sm->eap_if.eapResp = FALSE;
+ sm->eap_if.eapReq = FALSE;
+ sm->eap_if.eapNoReq = TRUE;
+ }
+}
+
+
+SM_STATE(EAP, INTEGRITY_CHECK)
+{
+ SM_ENTRY(EAP, INTEGRITY_CHECK);
+
+ if (sm->m->check) {
+ sm->ignore = sm->m->check(sm, sm->eap_method_priv,
+ sm->eap_if.eapRespData);
+ }
+}
+
+
+SM_STATE(EAP, METHOD_REQUEST)
+{
+ SM_ENTRY(EAP, METHOD_REQUEST);
+
+ if (sm->m == NULL) {
+ wpa_printf(MSG_DEBUG, "EAP: method not initialized");
+ return;
+ }
+
+ sm->currentId = eap_sm_nextId(sm, sm->currentId);
+ wpa_printf(MSG_DEBUG, "EAP: building EAP-Request: Identifier %d",
+ sm->currentId);
+ sm->lastId = sm->currentId;
+ wpabuf_free(sm->eap_if.eapReqData);
+ sm->eap_if.eapReqData = sm->m->buildReq(sm, sm->eap_method_priv,
+ sm->currentId);
+ if (sm->m->getTimeout)
+ sm->methodTimeout = sm->m->getTimeout(sm, sm->eap_method_priv);
+ else
+ sm->methodTimeout = 0;
+}
+
+
+SM_STATE(EAP, METHOD_RESPONSE)
+{
+ SM_ENTRY(EAP, METHOD_RESPONSE);
+
+ sm->m->process(sm, sm->eap_method_priv, sm->eap_if.eapRespData);
+ if (sm->m->isDone(sm, sm->eap_method_priv)) {
+ eap_sm_Policy_update(sm, NULL, 0);
+ os_free(sm->eap_if.eapKeyData);
+ if (sm->m->getKey) {
+ sm->eap_if.eapKeyData = sm->m->getKey(
+ sm, sm->eap_method_priv,
+ &sm->eap_if.eapKeyDataLen);
+ } else {
+ sm->eap_if.eapKeyData = NULL;
+ sm->eap_if.eapKeyDataLen = 0;
+ }
+ sm->methodState = METHOD_END;
+ } else {
+ sm->methodState = METHOD_CONTINUE;
+ }
+}
+
+
+SM_STATE(EAP, PROPOSE_METHOD)
+{
+ int vendor;
+ EapType type;
+
+ SM_ENTRY(EAP, PROPOSE_METHOD);
+
+ type = eap_sm_Policy_getNextMethod(sm, &vendor);
+ if (vendor == EAP_VENDOR_IETF)
+ sm->currentMethod = type;
+ else
+ sm->currentMethod = EAP_TYPE_EXPANDED;
+ if (sm->m && sm->eap_method_priv) {
+ sm->m->reset(sm, sm->eap_method_priv);
+ sm->eap_method_priv = NULL;
+ }
+ sm->m = eap_server_get_eap_method(vendor, type);
+ if (sm->m) {
+ sm->eap_method_priv = sm->m->init(sm);
+ if (sm->eap_method_priv == NULL) {
+ wpa_printf(MSG_DEBUG, "EAP: Failed to initialize EAP "
+ "method %d", sm->currentMethod);
+ sm->m = NULL;
+ sm->currentMethod = EAP_TYPE_NONE;
+ }
+ }
+ if (sm->currentMethod == EAP_TYPE_IDENTITY ||
+ sm->currentMethod == EAP_TYPE_NOTIFICATION)
+ sm->methodState = METHOD_CONTINUE;
+ else
+ sm->methodState = METHOD_PROPOSED;
+}
+
+
+SM_STATE(EAP, NAK)
+{
+ const struct eap_hdr *nak;
+ size_t len = 0;
+ const u8 *pos;
+ const u8 *nak_list = NULL;
+
+ SM_ENTRY(EAP, NAK);
+
+ if (sm->eap_method_priv) {
+ sm->m->reset(sm, sm->eap_method_priv);
+ sm->eap_method_priv = NULL;
+ }
+ sm->m = NULL;
+
+ nak = wpabuf_head(sm->eap_if.eapRespData);
+ if (nak && wpabuf_len(sm->eap_if.eapRespData) > sizeof(*nak)) {
+ len = be_to_host16(nak->length);
+ if (len > wpabuf_len(sm->eap_if.eapRespData))
+ len = wpabuf_len(sm->eap_if.eapRespData);
+ pos = (const u8 *) (nak + 1);
+ len -= sizeof(*nak);
+ if (*pos == EAP_TYPE_NAK) {
+ pos++;
+ len--;
+ nak_list = pos;
+ }
+ }
+ eap_sm_Policy_update(sm, nak_list, len);
+}
+
+
+SM_STATE(EAP, SELECT_ACTION)
+{
+ SM_ENTRY(EAP, SELECT_ACTION);
+
+ sm->decision = eap_sm_Policy_getDecision(sm);
+}
+
+
+SM_STATE(EAP, TIMEOUT_FAILURE)
+{
+ SM_ENTRY(EAP, TIMEOUT_FAILURE);
+
+ sm->eap_if.eapTimeout = TRUE;
+}
+
+
+SM_STATE(EAP, FAILURE)
+{
+ SM_ENTRY(EAP, FAILURE);
+
+ wpabuf_free(sm->eap_if.eapReqData);
+ sm->eap_if.eapReqData = eap_sm_buildFailure(sm, sm->currentId);
+ wpabuf_free(sm->lastReqData);
+ sm->lastReqData = NULL;
+ sm->eap_if.eapFail = TRUE;
+}
+
+
+SM_STATE(EAP, SUCCESS)
+{
+ SM_ENTRY(EAP, SUCCESS);
+
+ wpabuf_free(sm->eap_if.eapReqData);
+ sm->eap_if.eapReqData = eap_sm_buildSuccess(sm, sm->currentId);
+ wpabuf_free(sm->lastReqData);
+ sm->lastReqData = NULL;
+ if (sm->eap_if.eapKeyData)
+ sm->eap_if.eapKeyAvailable = TRUE;
+ sm->eap_if.eapSuccess = TRUE;
+}
+
+
+SM_STATE(EAP, INITIALIZE_PASSTHROUGH)
+{
+ SM_ENTRY(EAP, INITIALIZE_PASSTHROUGH);
+
+ wpabuf_free(sm->eap_if.aaaEapRespData);
+ sm->eap_if.aaaEapRespData = NULL;
+}
+
+
+SM_STATE(EAP, IDLE2)
+{
+ SM_ENTRY(EAP, IDLE2);
+
+ sm->eap_if.retransWhile = eap_sm_calculateTimeout(
+ sm, sm->retransCount, sm->eap_if.eapSRTT, sm->eap_if.eapRTTVAR,
+ sm->methodTimeout);
+}
+
+
+SM_STATE(EAP, RETRANSMIT2)
+{
+ SM_ENTRY(EAP, RETRANSMIT2);
+
+ sm->retransCount++;
+ if (sm->retransCount <= sm->MaxRetrans && sm->lastReqData) {
+ if (eap_copy_buf(&sm->eap_if.eapReqData, sm->lastReqData) == 0)
+ sm->eap_if.eapReq = TRUE;
+ }
+}
+
+
+SM_STATE(EAP, RECEIVED2)
+{
+ SM_ENTRY(EAP, RECEIVED2);
+
+ /* parse rxResp, respId, respMethod */
+ eap_sm_parseEapResp(sm, sm->eap_if.eapRespData);
+}
+
+
+SM_STATE(EAP, DISCARD2)
+{
+ SM_ENTRY(EAP, DISCARD2);
+ sm->eap_if.eapResp = FALSE;
+ sm->eap_if.eapNoReq = TRUE;
+}
+
+
+SM_STATE(EAP, SEND_REQUEST2)
+{
+ SM_ENTRY(EAP, SEND_REQUEST2);
+
+ sm->retransCount = 0;
+ if (sm->eap_if.eapReqData) {
+ if (eap_copy_buf(&sm->lastReqData, sm->eap_if.eapReqData) == 0)
+ {
+ sm->eap_if.eapResp = FALSE;
+ sm->eap_if.eapReq = TRUE;
+ } else {
+ sm->eap_if.eapResp = FALSE;
+ sm->eap_if.eapReq = FALSE;
+ }
+ } else {
+ wpa_printf(MSG_INFO, "EAP: SEND_REQUEST2 - no eapReqData");
+ sm->eap_if.eapResp = FALSE;
+ sm->eap_if.eapReq = FALSE;
+ sm->eap_if.eapNoReq = TRUE;
+ }
+}
+
+
+SM_STATE(EAP, AAA_REQUEST)
+{
+ SM_ENTRY(EAP, AAA_REQUEST);
+
+ if (sm->eap_if.eapRespData == NULL) {
+ wpa_printf(MSG_INFO, "EAP: AAA_REQUEST - no eapRespData");
+ return;
+ }
+
+ /*
+ * if (respMethod == IDENTITY)
+ * aaaIdentity = eapRespData
+ * This is already taken care of by the EAP-Identity method which
+ * stores the identity into sm->identity.
+ */
+
+ eap_copy_buf(&sm->eap_if.aaaEapRespData, sm->eap_if.eapRespData);
+}
+
+
+SM_STATE(EAP, AAA_RESPONSE)
+{
+ SM_ENTRY(EAP, AAA_RESPONSE);
+
+ eap_copy_buf(&sm->eap_if.eapReqData, sm->eap_if.aaaEapReqData);
+ sm->currentId = eap_sm_getId(sm->eap_if.eapReqData);
+ sm->methodTimeout = sm->eap_if.aaaMethodTimeout;
+}
+
+
+SM_STATE(EAP, AAA_IDLE)
+{
+ SM_ENTRY(EAP, AAA_IDLE);
+
+ sm->eap_if.aaaFail = FALSE;
+ sm->eap_if.aaaSuccess = FALSE;
+ sm->eap_if.aaaEapReq = FALSE;
+ sm->eap_if.aaaEapNoReq = FALSE;
+ sm->eap_if.aaaEapResp = TRUE;
+}
+
+
+SM_STATE(EAP, TIMEOUT_FAILURE2)
+{
+ SM_ENTRY(EAP, TIMEOUT_FAILURE2);
+
+ sm->eap_if.eapTimeout = TRUE;
+}
+
+
+SM_STATE(EAP, FAILURE2)
+{
+ SM_ENTRY(EAP, FAILURE2);
+
+ eap_copy_buf(&sm->eap_if.eapReqData, sm->eap_if.aaaEapReqData);
+ sm->eap_if.eapFail = TRUE;
+}
+
+
+SM_STATE(EAP, SUCCESS2)
+{
+ SM_ENTRY(EAP, SUCCESS2);
+
+ eap_copy_buf(&sm->eap_if.eapReqData, sm->eap_if.aaaEapReqData);
+
+ sm->eap_if.eapKeyAvailable = sm->eap_if.aaaEapKeyAvailable;
+ if (sm->eap_if.aaaEapKeyAvailable) {
+ EAP_COPY(&sm->eap_if.eapKeyData, sm->eap_if.aaaEapKeyData);
+ } else {
+ os_free(sm->eap_if.eapKeyData);
+ sm->eap_if.eapKeyData = NULL;
+ sm->eap_if.eapKeyDataLen = 0;
+ }
+
+ sm->eap_if.eapSuccess = TRUE;
+
+ /*
+ * Start reauthentication with identity request even though we know the
+ * previously used identity. This is needed to get reauthentication
+ * started properly.
+ */
+ sm->start_reauth = TRUE;
+}
+
+
+SM_STEP(EAP)
+{
+ if (sm->eap_if.eapRestart && sm->eap_if.portEnabled)
+ SM_ENTER_GLOBAL(EAP, INITIALIZE);
+ else if (!sm->eap_if.portEnabled)
+ SM_ENTER_GLOBAL(EAP, DISABLED);
+ else if (sm->num_rounds > EAP_MAX_AUTH_ROUNDS) {
+ if (sm->num_rounds == EAP_MAX_AUTH_ROUNDS + 1) {
+ wpa_printf(MSG_DEBUG, "EAP: more than %d "
+ "authentication rounds - abort",
+ EAP_MAX_AUTH_ROUNDS);
+ sm->num_rounds++;
+ SM_ENTER_GLOBAL(EAP, FAILURE);
+ }
+ } else switch (sm->EAP_state) {
+ case EAP_INITIALIZE:
+ if (sm->backend_auth) {
+ if (!sm->rxResp)
+ SM_ENTER(EAP, SELECT_ACTION);
+ else if (sm->rxResp &&
+ (sm->respMethod == EAP_TYPE_NAK ||
+ (sm->respMethod == EAP_TYPE_EXPANDED &&
+ sm->respVendor == EAP_VENDOR_IETF &&
+ sm->respVendorMethod == EAP_TYPE_NAK)))
+ SM_ENTER(EAP, NAK);
+ else
+ SM_ENTER(EAP, PICK_UP_METHOD);
+ } else {
+ SM_ENTER(EAP, SELECT_ACTION);
+ }
+ break;
+ case EAP_PICK_UP_METHOD:
+ if (sm->currentMethod == EAP_TYPE_NONE) {
+ SM_ENTER(EAP, SELECT_ACTION);
+ } else {
+ SM_ENTER(EAP, METHOD_RESPONSE);
+ }
+ break;
+ case EAP_DISABLED:
+ if (sm->eap_if.portEnabled)
+ SM_ENTER(EAP, INITIALIZE);
+ break;
+ case EAP_IDLE:
+ if (sm->eap_if.retransWhile == 0)
+ SM_ENTER(EAP, RETRANSMIT);
+ else if (sm->eap_if.eapResp)
+ SM_ENTER(EAP, RECEIVED);
+ break;
+ case EAP_RETRANSMIT:
+ if (sm->retransCount > sm->MaxRetrans)
+ SM_ENTER(EAP, TIMEOUT_FAILURE);
+ else
+ SM_ENTER(EAP, IDLE);
+ break;
+ case EAP_RECEIVED:
+ if (sm->rxResp && (sm->respId == sm->currentId) &&
+ (sm->respMethod == EAP_TYPE_NAK ||
+ (sm->respMethod == EAP_TYPE_EXPANDED &&
+ sm->respVendor == EAP_VENDOR_IETF &&
+ sm->respVendorMethod == EAP_TYPE_NAK))
+ && (sm->methodState == METHOD_PROPOSED))
+ SM_ENTER(EAP, NAK);
+ else if (sm->rxResp && (sm->respId == sm->currentId) &&
+ ((sm->respMethod == sm->currentMethod) ||
+ (sm->respMethod == EAP_TYPE_EXPANDED &&
+ sm->respVendor == EAP_VENDOR_IETF &&
+ sm->respVendorMethod == sm->currentMethod)))
+ SM_ENTER(EAP, INTEGRITY_CHECK);
+ else {
+ wpa_printf(MSG_DEBUG, "EAP: RECEIVED->DISCARD: "
+ "rxResp=%d respId=%d currentId=%d "
+ "respMethod=%d currentMethod=%d",
+ sm->rxResp, sm->respId, sm->currentId,
+ sm->respMethod, sm->currentMethod);
+ SM_ENTER(EAP, DISCARD);
+ }
+ break;
+ case EAP_DISCARD:
+ SM_ENTER(EAP, IDLE);
+ break;
+ case EAP_SEND_REQUEST:
+ SM_ENTER(EAP, IDLE);
+ break;
+ case EAP_INTEGRITY_CHECK:
+ if (sm->ignore)
+ SM_ENTER(EAP, DISCARD);
+ else
+ SM_ENTER(EAP, METHOD_RESPONSE);
+ break;
+ case EAP_METHOD_REQUEST:
+ SM_ENTER(EAP, SEND_REQUEST);
+ break;
+ case EAP_METHOD_RESPONSE:
+ /*
+ * Note: Mechanism to allow EAP methods to wait while going
+ * through pending processing is an extension to RFC 4137
+ * which only defines the transits to SELECT_ACTION and
+ * METHOD_REQUEST from this METHOD_RESPONSE state.
+ */
+ if (sm->methodState == METHOD_END)
+ SM_ENTER(EAP, SELECT_ACTION);
+ else if (sm->method_pending == METHOD_PENDING_WAIT) {
+ wpa_printf(MSG_DEBUG, "EAP: Method has pending "
+ "processing - wait before proceeding to "
+ "METHOD_REQUEST state");
+ } else if (sm->method_pending == METHOD_PENDING_CONT) {
+ wpa_printf(MSG_DEBUG, "EAP: Method has completed "
+ "pending processing - reprocess pending "
+ "EAP message");
+ sm->method_pending = METHOD_PENDING_NONE;
+ SM_ENTER(EAP, METHOD_RESPONSE);
+ } else
+ SM_ENTER(EAP, METHOD_REQUEST);
+ break;
+ case EAP_PROPOSE_METHOD:
+ /*
+ * Note: Mechanism to allow EAP methods to wait while going
+ * through pending processing is an extension to RFC 4137
+ * which only defines the transit to METHOD_REQUEST from this
+ * PROPOSE_METHOD state.
+ */
+ if (sm->method_pending == METHOD_PENDING_WAIT) {
+ wpa_printf(MSG_DEBUG, "EAP: Method has pending "
+ "processing - wait before proceeding to "
+ "METHOD_REQUEST state");
+ if (sm->user_eap_method_index > 0)
+ sm->user_eap_method_index--;
+ } else if (sm->method_pending == METHOD_PENDING_CONT) {
+ wpa_printf(MSG_DEBUG, "EAP: Method has completed "
+ "pending processing - reprocess pending "
+ "EAP message");
+ sm->method_pending = METHOD_PENDING_NONE;
+ SM_ENTER(EAP, PROPOSE_METHOD);
+ } else
+ SM_ENTER(EAP, METHOD_REQUEST);
+ break;
+ case EAP_NAK:
+ SM_ENTER(EAP, SELECT_ACTION);
+ break;
+ case EAP_SELECT_ACTION:
+ if (sm->decision == DECISION_FAILURE)
+ SM_ENTER(EAP, FAILURE);
+ else if (sm->decision == DECISION_SUCCESS)
+ SM_ENTER(EAP, SUCCESS);
+ else if (sm->decision == DECISION_PASSTHROUGH)
+ SM_ENTER(EAP, INITIALIZE_PASSTHROUGH);
+ else
+ SM_ENTER(EAP, PROPOSE_METHOD);
+ break;
+ case EAP_TIMEOUT_FAILURE:
+ break;
+ case EAP_FAILURE:
+ break;
+ case EAP_SUCCESS:
+ break;
+
+ case EAP_INITIALIZE_PASSTHROUGH:
+ if (sm->currentId == -1)
+ SM_ENTER(EAP, AAA_IDLE);
+ else
+ SM_ENTER(EAP, AAA_REQUEST);
+ break;
+ case EAP_IDLE2:
+ if (sm->eap_if.eapResp)
+ SM_ENTER(EAP, RECEIVED2);
+ else if (sm->eap_if.retransWhile == 0)
+ SM_ENTER(EAP, RETRANSMIT2);
+ break;
+ case EAP_RETRANSMIT2:
+ if (sm->retransCount > sm->MaxRetrans)
+ SM_ENTER(EAP, TIMEOUT_FAILURE2);
+ else
+ SM_ENTER(EAP, IDLE2);
+ break;
+ case EAP_RECEIVED2:
+ if (sm->rxResp && (sm->respId == sm->currentId))
+ SM_ENTER(EAP, AAA_REQUEST);
+ else
+ SM_ENTER(EAP, DISCARD2);
+ break;
+ case EAP_DISCARD2:
+ SM_ENTER(EAP, IDLE2);
+ break;
+ case EAP_SEND_REQUEST2:
+ SM_ENTER(EAP, IDLE2);
+ break;
+ case EAP_AAA_REQUEST:
+ SM_ENTER(EAP, AAA_IDLE);
+ break;
+ case EAP_AAA_RESPONSE:
+ SM_ENTER(EAP, SEND_REQUEST2);
+ break;
+ case EAP_AAA_IDLE:
+ if (sm->eap_if.aaaFail)
+ SM_ENTER(EAP, FAILURE2);
+ else if (sm->eap_if.aaaSuccess)
+ SM_ENTER(EAP, SUCCESS2);
+ else if (sm->eap_if.aaaEapReq)
+ SM_ENTER(EAP, AAA_RESPONSE);
+ else if (sm->eap_if.aaaTimeout)
+ SM_ENTER(EAP, TIMEOUT_FAILURE2);
+ break;
+ case EAP_TIMEOUT_FAILURE2:
+ break;
+ case EAP_FAILURE2:
+ break;
+ case EAP_SUCCESS2:
+ break;
+ }
+}
+
+
+static int eap_sm_calculateTimeout(struct eap_sm *sm, int retransCount,
+ int eapSRTT, int eapRTTVAR,
+ int methodTimeout)
+{
+ int rto, i;
+
+ if (methodTimeout) {
+ /*
+ * EAP method (either internal or through AAA server, provided
+ * timeout hint. Use that as-is as a timeout for retransmitting
+ * the EAP request if no response is received.
+ */
+ wpa_printf(MSG_DEBUG, "EAP: retransmit timeout %d seconds "
+ "(from EAP method hint)", methodTimeout);
+ return methodTimeout;
+ }
+
+ /*
+ * RFC 3748 recommends algorithms described in RFC 2988 for estimation
+ * of the retransmission timeout. This should be implemented once
+ * round-trip time measurements are available. For nowm a simple
+ * backoff mechanism is used instead if there are no EAP method
+ * specific hints.
+ *
+ * SRTT = smoothed round-trip time
+ * RTTVAR = round-trip time variation
+ * RTO = retransmission timeout
+ */
+
+ /*
+ * RFC 2988, 2.1: before RTT measurement, set RTO to 3 seconds for
+ * initial retransmission and then double the RTO to provide back off
+ * per 5.5. Limit the maximum RTO to 20 seconds per RFC 3748, 4.3
+ * modified RTOmax.
+ */
+ rto = 3;
+ for (i = 0; i < retransCount; i++) {
+ rto *= 2;
+ if (rto >= 20) {
+ rto = 20;
+ break;
+ }
+ }
+
+ wpa_printf(MSG_DEBUG, "EAP: retransmit timeout %d seconds "
+ "(from dynamic back off; retransCount=%d)",
+ rto, retransCount);
+
+ return rto;
+}
+
+
+static void eap_sm_parseEapResp(struct eap_sm *sm, const struct wpabuf *resp)
+{
+ const struct eap_hdr *hdr;
+ size_t plen;
+
+ /* parse rxResp, respId, respMethod */
+ sm->rxResp = FALSE;
+ sm->respId = -1;
+ sm->respMethod = EAP_TYPE_NONE;
+ sm->respVendor = EAP_VENDOR_IETF;
+ sm->respVendorMethod = EAP_TYPE_NONE;
+
+ if (resp == NULL || wpabuf_len(resp) < sizeof(*hdr)) {
+ wpa_printf(MSG_DEBUG, "EAP: parseEapResp: invalid resp=%p "
+ "len=%lu", resp,
+ resp ? (unsigned long) wpabuf_len(resp) : 0);
+ return;
+ }
+
+ hdr = wpabuf_head(resp);
+ plen = be_to_host16(hdr->length);
+ if (plen > wpabuf_len(resp)) {
+ wpa_printf(MSG_DEBUG, "EAP: Ignored truncated EAP-Packet "
+ "(len=%lu plen=%lu)",
+ (unsigned long) wpabuf_len(resp),
+ (unsigned long) plen);
+ return;
+ }
+
+ sm->respId = hdr->identifier;
+
+ if (hdr->code == EAP_CODE_RESPONSE)
+ sm->rxResp = TRUE;
+
+ if (plen > sizeof(*hdr)) {
+ u8 *pos = (u8 *) (hdr + 1);
+ sm->respMethod = *pos++;
+ if (sm->respMethod == EAP_TYPE_EXPANDED) {
+ if (plen < sizeof(*hdr) + 8) {
+ wpa_printf(MSG_DEBUG, "EAP: Ignored truncated "
+ "expanded EAP-Packet (plen=%lu)",
+ (unsigned long) plen);
+ return;
+ }
+ sm->respVendor = WPA_GET_BE24(pos);
+ pos += 3;
+ sm->respVendorMethod = WPA_GET_BE32(pos);
+ }
+ }
+
+ wpa_printf(MSG_DEBUG, "EAP: parseEapResp: rxResp=%d respId=%d "
+ "respMethod=%u respVendor=%u respVendorMethod=%u",
+ sm->rxResp, sm->respId, sm->respMethod, sm->respVendor,
+ sm->respVendorMethod);
+}
+
+
+static int eap_sm_getId(const struct wpabuf *data)
+{
+ const struct eap_hdr *hdr;
+
+ if (data == NULL || wpabuf_len(data) < sizeof(*hdr))
+ return -1;
+
+ hdr = wpabuf_head(data);
+ wpa_printf(MSG_DEBUG, "EAP: getId: id=%d", hdr->identifier);
+ return hdr->identifier;
+}
+
+
+static struct wpabuf * eap_sm_buildSuccess(struct eap_sm *sm, u8 id)
+{
+ struct wpabuf *msg;
+ struct eap_hdr *resp;
+ wpa_printf(MSG_DEBUG, "EAP: Building EAP-Success (id=%d)", id);
+
+ msg = wpabuf_alloc(sizeof(*resp));
+ if (msg == NULL)
+ return NULL;
+ resp = wpabuf_put(msg, sizeof(*resp));
+ resp->code = EAP_CODE_SUCCESS;
+ resp->identifier = id;
+ resp->length = host_to_be16(sizeof(*resp));
+
+ return msg;
+}
+
+
+static struct wpabuf * eap_sm_buildFailure(struct eap_sm *sm, u8 id)
+{
+ struct wpabuf *msg;
+ struct eap_hdr *resp;
+ wpa_printf(MSG_DEBUG, "EAP: Building EAP-Failure (id=%d)", id);
+
+ msg = wpabuf_alloc(sizeof(*resp));
+ if (msg == NULL)
+ return NULL;
+ resp = wpabuf_put(msg, sizeof(*resp));
+ resp->code = EAP_CODE_FAILURE;
+ resp->identifier = id;
+ resp->length = host_to_be16(sizeof(*resp));
+
+ return msg;
+}
+
+
+static int eap_sm_nextId(struct eap_sm *sm, int id)
+{
+ if (id < 0) {
+ /* RFC 3748 Ch 4.1: recommended to initialize Identifier with a
+ * random number */
+ id = rand() & 0xff;
+ if (id != sm->lastId)
+ return id;
+ }
+ return (id + 1) & 0xff;
+}
+
+
+/**
+ * eap_sm_process_nak - Process EAP-Response/Nak
+ * @sm: Pointer to EAP state machine allocated with eap_server_sm_init()
+ * @nak_list: Nak list (allowed methods) from the supplicant
+ * @len: Length of nak_list in bytes
+ *
+ * This function is called when EAP-Response/Nak is received from the
+ * supplicant. This can happen for both phase 1 and phase 2 authentications.
+ */
+void eap_sm_process_nak(struct eap_sm *sm, const u8 *nak_list, size_t len)
+{
+ int i;
+ size_t j;
+
+ if (sm->user == NULL)
+ return;
+
+ wpa_printf(MSG_MSGDUMP, "EAP: processing NAK (current EAP method "
+ "index %d)", sm->user_eap_method_index);
+
+ wpa_hexdump(MSG_MSGDUMP, "EAP: configured methods",
+ (u8 *) sm->user->methods,
+ EAP_MAX_METHODS * sizeof(sm->user->methods[0]));
+ wpa_hexdump(MSG_MSGDUMP, "EAP: list of methods supported by the peer",
+ nak_list, len);
+
+ i = sm->user_eap_method_index;
+ while (i < EAP_MAX_METHODS &&
+ (sm->user->methods[i].vendor != EAP_VENDOR_IETF ||
+ sm->user->methods[i].method != EAP_TYPE_NONE)) {
+ if (sm->user->methods[i].vendor != EAP_VENDOR_IETF)
+ goto not_found;
+ for (j = 0; j < len; j++) {
+ if (nak_list[j] == sm->user->methods[i].method) {
+ break;
+ }
+ }
+
+ if (j < len) {
+ /* found */
+ i++;
+ continue;
+ }
+
+ not_found:
+ /* not found - remove from the list */
+ os_memmove(&sm->user->methods[i], &sm->user->methods[i + 1],
+ (EAP_MAX_METHODS - i - 1) *
+ sizeof(sm->user->methods[0]));
+ sm->user->methods[EAP_MAX_METHODS - 1].vendor =
+ EAP_VENDOR_IETF;
+ sm->user->methods[EAP_MAX_METHODS - 1].method = EAP_TYPE_NONE;
+ }
+
+ wpa_hexdump(MSG_MSGDUMP, "EAP: new list of configured methods",
+ (u8 *) sm->user->methods, EAP_MAX_METHODS *
+ sizeof(sm->user->methods[0]));
+}
+
+
+static void eap_sm_Policy_update(struct eap_sm *sm, const u8 *nak_list,
+ size_t len)
+{
+ if (nak_list == NULL || sm == NULL || sm->user == NULL)
+ return;
+
+ if (sm->user->phase2) {
+ wpa_printf(MSG_DEBUG, "EAP: EAP-Nak received after Phase2 user"
+ " info was selected - reject");
+ sm->decision = DECISION_FAILURE;
+ return;
+ }
+
+ eap_sm_process_nak(sm, nak_list, len);
+}
+
+
+static EapType eap_sm_Policy_getNextMethod(struct eap_sm *sm, int *vendor)
+{
+ EapType next;
+ int idx = sm->user_eap_method_index;
+
+ /* In theory, there should be no problems with starting
+ * re-authentication with something else than EAP-Request/Identity and
+ * this does indeed work with wpa_supplicant. However, at least Funk
+ * Supplicant seemed to ignore re-auth if it skipped
+ * EAP-Request/Identity.
+ * Re-auth sets currentId == -1, so that can be used here to select
+ * whether Identity needs to be requested again. */
+ if (sm->identity == NULL || sm->currentId == -1) {
+ *vendor = EAP_VENDOR_IETF;
+ next = EAP_TYPE_IDENTITY;
+ sm->update_user = TRUE;
+ } else if (sm->user && idx < EAP_MAX_METHODS &&
+ (sm->user->methods[idx].vendor != EAP_VENDOR_IETF ||
+ sm->user->methods[idx].method != EAP_TYPE_NONE)) {
+ *vendor = sm->user->methods[idx].vendor;
+ next = sm->user->methods[idx].method;
+ sm->user_eap_method_index++;
+ } else {
+ *vendor = EAP_VENDOR_IETF;
+ next = EAP_TYPE_NONE;
+ }
+ wpa_printf(MSG_DEBUG, "EAP: getNextMethod: vendor %d type %d",
+ *vendor, next);
+ return next;
+}
+
+
+static int eap_sm_Policy_getDecision(struct eap_sm *sm)
+{
+ if (!sm->eap_server && sm->identity && !sm->start_reauth) {
+ wpa_printf(MSG_DEBUG, "EAP: getDecision: -> PASSTHROUGH");
+ return DECISION_PASSTHROUGH;
+ }
+
+ if (sm->m && sm->currentMethod != EAP_TYPE_IDENTITY &&
+ sm->m->isSuccess(sm, sm->eap_method_priv)) {
+ wpa_printf(MSG_DEBUG, "EAP: getDecision: method succeeded -> "
+ "SUCCESS");
+ sm->update_user = TRUE;
+ return DECISION_SUCCESS;
+ }
+
+ if (sm->m && sm->m->isDone(sm, sm->eap_method_priv) &&
+ !sm->m->isSuccess(sm, sm->eap_method_priv)) {
+ wpa_printf(MSG_DEBUG, "EAP: getDecision: method failed -> "
+ "FAILURE");
+ sm->update_user = TRUE;
+ return DECISION_FAILURE;
+ }
+
+ if ((sm->user == NULL || sm->update_user) && sm->identity &&
+ !sm->start_reauth) {
+ /*
+ * Allow Identity method to be started once to allow identity
+ * selection hint to be sent from the authentication server,
+ * but prevent a loop of Identity requests by only allowing
+ * this to happen once.
+ */
+ int id_req = 0;
+ if (sm->user && sm->currentMethod == EAP_TYPE_IDENTITY &&
+ sm->user->methods[0].vendor == EAP_VENDOR_IETF &&
+ sm->user->methods[0].method == EAP_TYPE_IDENTITY)
+ id_req = 1;
+ if (eap_user_get(sm, sm->identity, sm->identity_len, 0) != 0) {
+ wpa_printf(MSG_DEBUG, "EAP: getDecision: user not "
+ "found from database -> FAILURE");
+ return DECISION_FAILURE;
+ }
+ if (id_req && sm->user &&
+ sm->user->methods[0].vendor == EAP_VENDOR_IETF &&
+ sm->user->methods[0].method == EAP_TYPE_IDENTITY) {
+ wpa_printf(MSG_DEBUG, "EAP: getDecision: stop "
+ "identity request loop -> FAILURE");
+ sm->update_user = TRUE;
+ return DECISION_FAILURE;
+ }
+ sm->update_user = FALSE;
+ }
+ sm->start_reauth = FALSE;
+
+ if (sm->user && sm->user_eap_method_index < EAP_MAX_METHODS &&
+ (sm->user->methods[sm->user_eap_method_index].vendor !=
+ EAP_VENDOR_IETF ||
+ sm->user->methods[sm->user_eap_method_index].method !=
+ EAP_TYPE_NONE)) {
+ wpa_printf(MSG_DEBUG, "EAP: getDecision: another method "
+ "available -> CONTINUE");
+ return DECISION_CONTINUE;
+ }
+
+ if (sm->identity == NULL || sm->currentId == -1) {
+ wpa_printf(MSG_DEBUG, "EAP: getDecision: no identity known "
+ "yet -> CONTINUE");
+ return DECISION_CONTINUE;
+ }
+
+ wpa_printf(MSG_DEBUG, "EAP: getDecision: no more methods available -> "
+ "FAILURE");
+ return DECISION_FAILURE;
+}
+
+
+static Boolean eap_sm_Policy_doPickUp(struct eap_sm *sm, EapType method)
+{
+ return method == EAP_TYPE_IDENTITY ? TRUE : FALSE;
+}
+
+
+/**
+ * eap_server_sm_step - Step EAP server state machine
+ * @sm: Pointer to EAP state machine allocated with eap_server_sm_init()
+ * Returns: 1 if EAP state was changed or 0 if not
+ *
+ * This function advances EAP state machine to a new state to match with the
+ * current variables. This should be called whenever variables used by the EAP
+ * state machine have changed.
+ */
+int eap_server_sm_step(struct eap_sm *sm)
+{
+ int res = 0;
+ do {
+ sm->changed = FALSE;
+ SM_STEP_RUN(EAP);
+ if (sm->changed)
+ res = 1;
+ } while (sm->changed);
+ return res;
+}
+
+
+static void eap_user_free(struct eap_user *user)
+{
+ if (user == NULL)
+ return;
+ os_free(user->password);
+ user->password = NULL;
+ os_free(user);
+}
+
+
+/**
+ * eap_server_sm_init - Allocate and initialize EAP server state machine
+ * @eapol_ctx: Context data to be used with eapol_cb calls
+ * @eapol_cb: Pointer to EAPOL callback functions
+ * @conf: EAP configuration
+ * Returns: Pointer to the allocated EAP state machine or %NULL on failure
+ *
+ * This function allocates and initializes an EAP state machine.
+ */
+struct eap_sm * eap_server_sm_init(void *eapol_ctx,
+ struct eapol_callbacks *eapol_cb,
+ struct eap_config *conf)
+{
+ struct eap_sm *sm;
+
+ sm = os_zalloc(sizeof(*sm));
+ if (sm == NULL)
+ return NULL;
+ sm->eapol_ctx = eapol_ctx;
+ sm->eapol_cb = eapol_cb;
+ sm->MaxRetrans = 5; /* RFC 3748: max 3-5 retransmissions suggested */
+ sm->ssl_ctx = conf->ssl_ctx;
+ sm->eap_sim_db_priv = conf->eap_sim_db_priv;
+ sm->backend_auth = conf->backend_auth;
+ sm->eap_server = conf->eap_server;
+ if (conf->pac_opaque_encr_key) {
+ sm->pac_opaque_encr_key = os_malloc(16);
+ if (sm->pac_opaque_encr_key) {
+ os_memcpy(sm->pac_opaque_encr_key,
+ conf->pac_opaque_encr_key, 16);
+ }
+ }
+ if (conf->eap_fast_a_id) {
+ sm->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
+ if (sm->eap_fast_a_id) {
+ os_memcpy(sm->eap_fast_a_id, conf->eap_fast_a_id,
+ conf->eap_fast_a_id_len);
+ sm->eap_fast_a_id_len = conf->eap_fast_a_id_len;
+ }
+ }
+ if (conf->eap_fast_a_id_info)
+ sm->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
+ sm->eap_fast_prov = conf->eap_fast_prov;
+ sm->pac_key_lifetime = conf->pac_key_lifetime;
+ sm->pac_key_refresh_time = conf->pac_key_refresh_time;
+ sm->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
+ sm->tnc = conf->tnc;
+ sm->wps = conf->wps;
+ if (conf->assoc_wps_ie)
+ sm->assoc_wps_ie = wpabuf_dup(conf->assoc_wps_ie);
+ if (conf->peer_addr)
+ os_memcpy(sm->peer_addr, conf->peer_addr, ETH_ALEN);
+
+ wpa_printf(MSG_DEBUG, "EAP: Server state machine created");
+
+ return sm;
+}
+
+
+/**
+ * eap_server_sm_deinit - Deinitialize and free an EAP server state machine
+ * @sm: Pointer to EAP state machine allocated with eap_server_sm_init()
+ *
+ * This function deinitializes EAP state machine and frees all allocated
+ * resources.
+ */
+void eap_server_sm_deinit(struct eap_sm *sm)
+{
+ if (sm == NULL)
+ return;
+ wpa_printf(MSG_DEBUG, "EAP: Server state machine removed");
+ if (sm->m && sm->eap_method_priv)
+ sm->m->reset(sm, sm->eap_method_priv);
+ wpabuf_free(sm->eap_if.eapReqData);
+ os_free(sm->eap_if.eapKeyData);
+ wpabuf_free(sm->lastReqData);
+ wpabuf_free(sm->eap_if.eapRespData);
+ os_free(sm->identity);
+ os_free(sm->pac_opaque_encr_key);
+ os_free(sm->eap_fast_a_id);
+ os_free(sm->eap_fast_a_id_info);
+ wpabuf_free(sm->eap_if.aaaEapReqData);
+ wpabuf_free(sm->eap_if.aaaEapRespData);
+ os_free(sm->eap_if.aaaEapKeyData);
+ eap_user_free(sm->user);
+ wpabuf_free(sm->assoc_wps_ie);
+ os_free(sm);
+}
+
+
+/**
+ * eap_sm_notify_cached - Notify EAP state machine of cached PMK
+ * @sm: Pointer to EAP state machine allocated with eap_server_sm_init()
+ *
+ * This function is called when PMKSA caching is used to skip EAP
+ * authentication.
+ */
+void eap_sm_notify_cached(struct eap_sm *sm)
+{
+ if (sm == NULL)
+ return;
+
+ sm->EAP_state = EAP_SUCCESS;
+}
+
+
+/**
+ * eap_sm_pending_cb - EAP state machine callback for a pending EAP request
+ * @sm: Pointer to EAP state machine allocated with eap_server_sm_init()
+ *
+ * This function is called when data for a pending EAP-Request is received.
+ */
+void eap_sm_pending_cb(struct eap_sm *sm)
+{
+ if (sm == NULL)
+ return;
+ wpa_printf(MSG_DEBUG, "EAP: Callback for pending request received");
+ if (sm->method_pending == METHOD_PENDING_WAIT)
+ sm->method_pending = METHOD_PENDING_CONT;
+}
+
+
+/**
+ * eap_sm_method_pending - Query whether EAP method is waiting for pending data
+ * @sm: Pointer to EAP state machine allocated with eap_server_sm_init()
+ * Returns: 1 if method is waiting for pending data or 0 if not
+ */
+int eap_sm_method_pending(struct eap_sm *sm)
+{
+ if (sm == NULL)
+ return 0;
+ return sm->method_pending == METHOD_PENDING_WAIT;
+}
+
+
+/**
+ * eap_get_identity - Get the user identity (from EAP-Response/Identity)
+ * @sm: Pointer to EAP state machine allocated with eap_server_sm_init()
+ * @len: Buffer for returning identity length
+ * Returns: Pointer to the user identity or %NULL if not available
+ */
+const u8 * eap_get_identity(struct eap_sm *sm, size_t *len)
+{
+ *len = sm->identity_len;
+ return sm->identity;
+}
+
+
+/**
+ * eap_get_interface - Get pointer to EAP-EAPOL interface data
+ * @sm: Pointer to EAP state machine allocated with eap_server_sm_init()
+ * Returns: Pointer to the EAP-EAPOL interface data
+ */
+struct eap_eapol_interface * eap_get_interface(struct eap_sm *sm)
+{
+ return &sm->eap_if;
+}