/*
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* EAP peer method: EAP-OTP (RFC 3748)
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* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "eap_i.h"
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static void * eap_otp_init(struct eap_sm *sm)
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{
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/* No need for private data. However, must return non-NULL to indicate
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* success. */
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return (void *) 1;
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}
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static void eap_otp_deinit(struct eap_sm *sm, void *priv)
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{
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}
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static struct wpabuf * eap_otp_process(struct eap_sm *sm, void *priv,
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struct eap_method_ret *ret,
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const struct wpabuf *reqData)
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{
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struct wpabuf *resp;
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const u8 *pos, *password;
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size_t password_len, len;
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int otp;
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pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_OTP, reqData, &len);
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if (pos == NULL) {
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ret->ignore = TRUE;
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return NULL;
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}
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wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-OTP: Request message",
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pos, len);
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password = eap_get_config_otp(sm, &password_len);
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if (password)
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otp = 1;
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else {
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password = eap_get_config_password(sm, &password_len);
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otp = 0;
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}
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if (password == NULL) {
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wpa_printf(MSG_INFO, "EAP-OTP: Password not configured");
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eap_sm_request_otp(sm, (const char *) pos, len);
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ret->ignore = TRUE;
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return NULL;
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}
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ret->ignore = FALSE;
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ret->methodState = METHOD_DONE;
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ret->decision = DECISION_COND_SUCC;
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ret->allowNotifications = FALSE;
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resp = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_OTP, password_len,
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EAP_CODE_RESPONSE, eap_get_id(reqData));
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if (resp == NULL)
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return NULL;
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wpabuf_put_data(resp, password, password_len);
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wpa_hexdump_ascii_key(MSG_MSGDUMP, "EAP-OTP: Response",
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password, password_len);
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if (otp) {
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wpa_printf(MSG_DEBUG, "EAP-OTP: Forgetting used password");
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eap_clear_config_otp(sm);
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}
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return resp;
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}
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int eap_peer_otp_register(void)
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{
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struct eap_method *eap;
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eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
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EAP_VENDOR_IETF, EAP_TYPE_OTP, "OTP");
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if (eap == NULL)
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return -1;
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eap->init = eap_otp_init;
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eap->deinit = eap_otp_deinit;
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eap->process = eap_otp_process;
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return eap_peer_method_register(eap);
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}
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