1/*
2 * EAP peer method: EAP-PEAP (draft-josefsson-pppext-eap-tls-eap-10.txt)
3 * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "includes.h"
10
11#include "common.h"
12#include "crypto/sha1.h"
13#include "crypto/tls.h"
14#include "eap_common/eap_tlv_common.h"
15#include "eap_common/eap_peap_common.h"
16#include "eap_i.h"
17#include "eap_tls_common.h"
18#include "eap_config.h"
19#include "tncc.h"
20
21
22/* Maximum supported PEAP version
23 * 0 = Microsoft's PEAP version 0; draft-kamath-pppext-peapv0-00.txt
24 * 1 = draft-josefsson-ppext-eap-tls-eap-05.txt
25 * 2 = draft-josefsson-ppext-eap-tls-eap-10.txt
26 */
27#define EAP_PEAP_VERSION 1
28
29
30static void eap_peap_deinit(struct eap_sm *sm, void *priv);
31
32
33struct eap_peap_data {
34	struct eap_ssl_data ssl;
35
36	int peap_version, force_peap_version, force_new_label;
37
38	const struct eap_method *phase2_method;
39	void *phase2_priv;
40	int phase2_success;
41	int phase2_eap_success;
42	int phase2_eap_started;
43
44	struct eap_method_type phase2_type;
45	struct eap_method_type *phase2_types;
46	size_t num_phase2_types;
47
48	int peap_outer_success; /* 0 = PEAP terminated on Phase 2 inner
49				 * EAP-Success
50				 * 1 = reply with tunneled EAP-Success to inner
51				 * EAP-Success and expect AS to send outer
52				 * (unencrypted) EAP-Success after this
53				 * 2 = reply with PEAP/TLS ACK to inner
54				 * EAP-Success and expect AS to send outer
55				 * (unencrypted) EAP-Success after this */
56	int resuming; /* starting a resumed session */
57	int reauth; /* reauthentication */
58	u8 *key_data;
59	u8 *session_id;
60	size_t id_len;
61
62	struct wpabuf *pending_phase2_req;
63	enum { NO_BINDING, OPTIONAL_BINDING, REQUIRE_BINDING } crypto_binding;
64	int crypto_binding_used;
65	u8 binding_nonce[32];
66	u8 ipmk[40];
67	u8 cmk[20];
68	int soh; /* Whether IF-TNCCS-SOH (Statement of Health; Microsoft NAP)
69		  * is enabled. */
70};
71
72
73static int eap_peap_parse_phase1(struct eap_peap_data *data,
74				 const char *phase1)
75{
76	const char *pos;
77
78	pos = os_strstr(phase1, "peapver=");
79	if (pos) {
80		data->force_peap_version = atoi(pos + 8);
81		data->peap_version = data->force_peap_version;
82		wpa_printf(MSG_DEBUG, "EAP-PEAP: Forced PEAP version %d",
83			   data->force_peap_version);
84	}
85
86	if (os_strstr(phase1, "peaplabel=1")) {
87		data->force_new_label = 1;
88		wpa_printf(MSG_DEBUG, "EAP-PEAP: Force new label for key "
89			   "derivation");
90	}
91
92	if (os_strstr(phase1, "peap_outer_success=0")) {
93		data->peap_outer_success = 0;
94		wpa_printf(MSG_DEBUG, "EAP-PEAP: terminate authentication on "
95			   "tunneled EAP-Success");
96	} else if (os_strstr(phase1, "peap_outer_success=1")) {
97		data->peap_outer_success = 1;
98		wpa_printf(MSG_DEBUG, "EAP-PEAP: send tunneled EAP-Success "
99			   "after receiving tunneled EAP-Success");
100	} else if (os_strstr(phase1, "peap_outer_success=2")) {
101		data->peap_outer_success = 2;
102		wpa_printf(MSG_DEBUG, "EAP-PEAP: send PEAP/TLS ACK after "
103			   "receiving tunneled EAP-Success");
104	}
105
106	if (os_strstr(phase1, "crypto_binding=0")) {
107		data->crypto_binding = NO_BINDING;
108		wpa_printf(MSG_DEBUG, "EAP-PEAP: Do not use cryptobinding");
109	} else if (os_strstr(phase1, "crypto_binding=1")) {
110		data->crypto_binding = OPTIONAL_BINDING;
111		wpa_printf(MSG_DEBUG, "EAP-PEAP: Optional cryptobinding");
112	} else if (os_strstr(phase1, "crypto_binding=2")) {
113		data->crypto_binding = REQUIRE_BINDING;
114		wpa_printf(MSG_DEBUG, "EAP-PEAP: Require cryptobinding");
115	}
116
117#ifdef EAP_TNC
118	if (os_strstr(phase1, "tnc=soh2")) {
119		data->soh = 2;
120		wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 2 enabled");
121	} else if (os_strstr(phase1, "tnc=soh1")) {
122		data->soh = 1;
123		wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 1 enabled");
124	} else if (os_strstr(phase1, "tnc=soh")) {
125		data->soh = 2;
126		wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 2 enabled");
127	}
128#endif /* EAP_TNC */
129
130	return 0;
131}
132
133
134static void * eap_peap_init(struct eap_sm *sm)
135{
136	struct eap_peap_data *data;
137	struct eap_peer_config *config = eap_get_config(sm);
138
139	data = os_zalloc(sizeof(*data));
140	if (data == NULL)
141		return NULL;
142	sm->peap_done = FALSE;
143	data->peap_version = EAP_PEAP_VERSION;
144	data->force_peap_version = -1;
145	data->peap_outer_success = 2;
146	data->crypto_binding = OPTIONAL_BINDING;
147
148	if (config && config->phase1 &&
149	    eap_peap_parse_phase1(data, config->phase1) < 0) {
150		eap_peap_deinit(sm, data);
151		return NULL;
152	}
153
154	if (eap_peer_select_phase2_methods(config, "auth=",
155					   &data->phase2_types,
156					   &data->num_phase2_types) < 0) {
157		eap_peap_deinit(sm, data);
158		return NULL;
159	}
160
161	data->phase2_type.vendor = EAP_VENDOR_IETF;
162	data->phase2_type.method = EAP_TYPE_NONE;
163
164	if (eap_peer_tls_ssl_init(sm, &data->ssl, config, EAP_TYPE_PEAP)) {
165		wpa_printf(MSG_INFO, "EAP-PEAP: Failed to initialize SSL.");
166		eap_peap_deinit(sm, data);
167		return NULL;
168	}
169
170	return data;
171}
172
173
174static void eap_peap_deinit(struct eap_sm *sm, void *priv)
175{
176	struct eap_peap_data *data = priv;
177	if (data == NULL)
178		return;
179	if (data->phase2_priv && data->phase2_method)
180		data->phase2_method->deinit(sm, data->phase2_priv);
181	os_free(data->phase2_types);
182	eap_peer_tls_ssl_deinit(sm, &data->ssl);
183	os_free(data->key_data);
184	os_free(data->session_id);
185	wpabuf_free(data->pending_phase2_req);
186	os_free(data);
187}
188
189
190/**
191 * eap_tlv_build_nak - Build EAP-TLV NAK message
192 * @id: EAP identifier for the header
193 * @nak_type: TLV type (EAP_TLV_*)
194 * Returns: Buffer to the allocated EAP-TLV NAK message or %NULL on failure
195 *
196 * This function builds an EAP-TLV NAK message. The caller is responsible for
197 * freeing the returned buffer.
198 */
199static struct wpabuf * eap_tlv_build_nak(int id, u16 nak_type)
200{
201	struct wpabuf *msg;
202
203	msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, 10,
204			    EAP_CODE_RESPONSE, id);
205	if (msg == NULL)
206		return NULL;
207
208	wpabuf_put_u8(msg, 0x80); /* Mandatory */
209	wpabuf_put_u8(msg, EAP_TLV_NAK_TLV);
210	wpabuf_put_be16(msg, 6); /* Length */
211	wpabuf_put_be32(msg, 0); /* Vendor-Id */
212	wpabuf_put_be16(msg, nak_type); /* NAK-Type */
213
214	return msg;
215}
216
217
218static int eap_peap_get_isk(struct eap_sm *sm, struct eap_peap_data *data,
219			    u8 *isk, size_t isk_len)
220{
221	u8 *key;
222	size_t key_len;
223
224	os_memset(isk, 0, isk_len);
225	if (data->phase2_method == NULL || data->phase2_priv == NULL ||
226	    data->phase2_method->isKeyAvailable == NULL ||
227	    data->phase2_method->getKey == NULL)
228		return 0;
229
230	if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
231	    (key = data->phase2_method->getKey(sm, data->phase2_priv,
232					       &key_len)) == NULL) {
233		wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not get key material "
234			   "from Phase 2");
235		return -1;
236	}
237
238	if (key_len > isk_len)
239		key_len = isk_len;
240	os_memcpy(isk, key, key_len);
241	os_free(key);
242
243	return 0;
244}
245
246
247static int eap_peap_derive_cmk(struct eap_sm *sm, struct eap_peap_data *data)
248{
249	u8 *tk;
250	u8 isk[32], imck[60];
251
252	/*
253	 * Tunnel key (TK) is the first 60 octets of the key generated by
254	 * phase 1 of PEAP (based on TLS).
255	 */
256	tk = data->key_data;
257	if (tk == NULL)
258		return -1;
259	wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TK", tk, 60);
260
261	if (data->reauth &&
262	    tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
263		/* Fast-connect: IPMK|CMK = TK */
264		os_memcpy(data->ipmk, tk, 40);
265		wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK from TK",
266				data->ipmk, 40);
267		os_memcpy(data->cmk, tk + 40, 20);
268		wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK from TK",
269				data->cmk, 20);
270		return 0;
271	}
272
273	if (eap_peap_get_isk(sm, data, isk, sizeof(isk)) < 0)
274		return -1;
275	wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: ISK", isk, sizeof(isk));
276
277	/*
278	 * IPMK Seed = "Inner Methods Compound Keys" | ISK
279	 * TempKey = First 40 octets of TK
280	 * IPMK|CMK = PRF+(TempKey, IPMK Seed, 60)
281	 * (note: draft-josefsson-pppext-eap-tls-eap-10.txt includes a space
282	 * in the end of the label just before ISK; is that just a typo?)
283	 */
284	wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TempKey", tk, 40);
285	if (peap_prfplus(data->peap_version, tk, 40,
286			 "Inner Methods Compound Keys",
287			 isk, sizeof(isk), imck, sizeof(imck)) < 0)
288		return -1;
289	wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IMCK (IPMKj)",
290			imck, sizeof(imck));
291
292	os_memcpy(data->ipmk, imck, 40);
293	wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK (S-IPMKj)", data->ipmk, 40);
294	os_memcpy(data->cmk, imck + 40, 20);
295	wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK (CMKj)", data->cmk, 20);
296
297	return 0;
298}
299
300
301static int eap_tlv_add_cryptobinding(struct eap_sm *sm,
302				     struct eap_peap_data *data,
303				     struct wpabuf *buf)
304{
305	u8 *mac;
306	u8 eap_type = EAP_TYPE_PEAP;
307	const u8 *addr[2];
308	size_t len[2];
309	u16 tlv_type;
310
311	/* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
312	addr[0] = wpabuf_put(buf, 0);
313	len[0] = 60;
314	addr[1] = &eap_type;
315	len[1] = 1;
316
317	tlv_type = EAP_TLV_CRYPTO_BINDING_TLV;
318	if (data->peap_version >= 2)
319		tlv_type |= EAP_TLV_TYPE_MANDATORY;
320	wpabuf_put_be16(buf, tlv_type);
321	wpabuf_put_be16(buf, 56);
322
323	wpabuf_put_u8(buf, 0); /* Reserved */
324	wpabuf_put_u8(buf, data->peap_version); /* Version */
325	wpabuf_put_u8(buf, data->peap_version); /* RecvVersion */
326	wpabuf_put_u8(buf, 1); /* SubType: 0 = Request, 1 = Response */
327	wpabuf_put_data(buf, data->binding_nonce, 32); /* Nonce */
328	mac = wpabuf_put(buf, 20); /* Compound_MAC */
329	wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC CMK", data->cmk, 20);
330	wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 1",
331		    addr[0], len[0]);
332	wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 2",
333		    addr[1], len[1]);
334	hmac_sha1_vector(data->cmk, 20, 2, addr, len, mac);
335	wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC", mac, SHA1_MAC_LEN);
336	data->crypto_binding_used = 1;
337
338	return 0;
339}
340
341
342/**
343 * eap_tlv_build_result - Build EAP-TLV Result message
344 * @id: EAP identifier for the header
345 * @status: Status (EAP_TLV_RESULT_SUCCESS or EAP_TLV_RESULT_FAILURE)
346 * Returns: Buffer to the allocated EAP-TLV Result message or %NULL on failure
347 *
348 * This function builds an EAP-TLV Result message. The caller is responsible
349 * for freeing the returned buffer.
350 */
351static struct wpabuf * eap_tlv_build_result(struct eap_sm *sm,
352					    struct eap_peap_data *data,
353					    int crypto_tlv_used,
354					    int id, u16 status)
355{
356	struct wpabuf *msg;
357	size_t len;
358
359	if (data->crypto_binding == NO_BINDING)
360		crypto_tlv_used = 0;
361
362	len = 6;
363	if (crypto_tlv_used)
364		len += 60; /* Cryptobinding TLV */
365	msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, len,
366			    EAP_CODE_RESPONSE, id);
367	if (msg == NULL)
368		return NULL;
369
370	wpabuf_put_u8(msg, 0x80); /* Mandatory */
371	wpabuf_put_u8(msg, EAP_TLV_RESULT_TLV);
372	wpabuf_put_be16(msg, 2); /* Length */
373	wpabuf_put_be16(msg, status); /* Status */
374
375	if (crypto_tlv_used && eap_tlv_add_cryptobinding(sm, data, msg)) {
376		wpabuf_free(msg);
377		return NULL;
378	}
379
380	return msg;
381}
382
383
384static int eap_tlv_validate_cryptobinding(struct eap_sm *sm,
385					  struct eap_peap_data *data,
386					  const u8 *crypto_tlv,
387					  size_t crypto_tlv_len)
388{
389	u8 buf[61], mac[SHA1_MAC_LEN];
390	const u8 *pos;
391
392	if (eap_peap_derive_cmk(sm, data) < 0) {
393		wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not derive CMK");
394		return -1;
395	}
396
397	if (crypto_tlv_len != 4 + 56) {
398		wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid cryptobinding TLV "
399			   "length %d", (int) crypto_tlv_len);
400		return -1;
401	}
402
403	pos = crypto_tlv;
404	pos += 4; /* TLV header */
405	if (pos[1] != data->peap_version) {
406		wpa_printf(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV Version "
407			   "mismatch (was %d; expected %d)",
408			   pos[1], data->peap_version);
409		return -1;
410	}
411
412	if (pos[3] != 0) {
413		wpa_printf(MSG_DEBUG, "EAP-PEAP: Unexpected Cryptobinding TLV "
414			   "SubType %d", pos[3]);
415		return -1;
416	}
417	pos += 4;
418	os_memcpy(data->binding_nonce, pos, 32);
419	pos += 32; /* Nonce */
420
421	/* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
422	os_memcpy(buf, crypto_tlv, 60);
423	os_memset(buf + 4 + 4 + 32, 0, 20); /* Compound_MAC */
424	buf[60] = EAP_TYPE_PEAP;
425	wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Compound_MAC data",
426		    buf, sizeof(buf));
427	hmac_sha1(data->cmk, 20, buf, sizeof(buf), mac);
428
429	if (os_memcmp(mac, pos, SHA1_MAC_LEN) != 0) {
430		wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid Compound_MAC in "
431			   "cryptobinding TLV");
432		wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Received MAC",
433			    pos, SHA1_MAC_LEN);
434		wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Expected MAC",
435			    mac, SHA1_MAC_LEN);
436		return -1;
437	}
438
439	wpa_printf(MSG_DEBUG, "EAP-PEAP: Valid cryptobinding TLV received");
440
441	return 0;
442}
443
444
445/**
446 * eap_tlv_process - Process a received EAP-TLV message and generate a response
447 * @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
448 * @ret: Return values from EAP request validation and processing
449 * @req: EAP-TLV request to be processed. The caller must have validated that
450 * the buffer is large enough to contain full request (hdr->length bytes) and
451 * that the EAP type is EAP_TYPE_TLV.
452 * @resp: Buffer to return a pointer to the allocated response message. This
453 * field should be initialized to %NULL before the call. The value will be
454 * updated if a response message is generated. The caller is responsible for
455 * freeing the allocated message.
456 * @force_failure: Force negotiation to fail
457 * Returns: 0 on success, -1 on failure
458 */
459static int eap_tlv_process(struct eap_sm *sm, struct eap_peap_data *data,
460			   struct eap_method_ret *ret,
461			   const struct wpabuf *req, struct wpabuf **resp,
462			   int force_failure)
463{
464	size_t left, tlv_len;
465	const u8 *pos;
466	const u8 *result_tlv = NULL, *crypto_tlv = NULL;
467	size_t result_tlv_len = 0, crypto_tlv_len = 0;
468	int tlv_type, mandatory;
469
470	/* Parse TLVs */
471	pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_TLV, req, &left);
472	if (pos == NULL)
473		return -1;
474	wpa_hexdump(MSG_DEBUG, "EAP-TLV: Received TLVs", pos, left);
475	while (left >= 4) {
476		mandatory = !!(pos[0] & 0x80);
477		tlv_type = WPA_GET_BE16(pos) & 0x3fff;
478		pos += 2;
479		tlv_len = WPA_GET_BE16(pos);
480		pos += 2;
481		left -= 4;
482		if (tlv_len > left) {
483			wpa_printf(MSG_DEBUG, "EAP-TLV: TLV underrun "
484				   "(tlv_len=%lu left=%lu)",
485				   (unsigned long) tlv_len,
486				   (unsigned long) left);
487			return -1;
488		}
489		switch (tlv_type) {
490		case EAP_TLV_RESULT_TLV:
491			result_tlv = pos;
492			result_tlv_len = tlv_len;
493			break;
494		case EAP_TLV_CRYPTO_BINDING_TLV:
495			crypto_tlv = pos;
496			crypto_tlv_len = tlv_len;
497			break;
498		default:
499			wpa_printf(MSG_DEBUG, "EAP-TLV: Unsupported TLV Type "
500				   "%d%s", tlv_type,
501				   mandatory ? " (mandatory)" : "");
502			if (mandatory) {
503				/* NAK TLV and ignore all TLVs in this packet.
504				 */
505				*resp = eap_tlv_build_nak(eap_get_id(req),
506							  tlv_type);
507				return *resp == NULL ? -1 : 0;
508			}
509			/* Ignore this TLV, but process other TLVs */
510			break;
511		}
512
513		pos += tlv_len;
514		left -= tlv_len;
515	}
516	if (left) {
517		wpa_printf(MSG_DEBUG, "EAP-TLV: Last TLV too short in "
518			   "Request (left=%lu)", (unsigned long) left);
519		return -1;
520	}
521
522	/* Process supported TLVs */
523	if (crypto_tlv && data->crypto_binding != NO_BINDING) {
524		wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV",
525			    crypto_tlv, crypto_tlv_len);
526		if (eap_tlv_validate_cryptobinding(sm, data, crypto_tlv - 4,
527						   crypto_tlv_len + 4) < 0) {
528			if (result_tlv == NULL)
529				return -1;
530			force_failure = 1;
531			crypto_tlv = NULL; /* do not include Cryptobinding TLV
532					    * in response, if the received
533					    * cryptobinding was invalid. */
534		}
535	} else if (!crypto_tlv && data->crypto_binding == REQUIRE_BINDING) {
536		wpa_printf(MSG_DEBUG, "EAP-PEAP: No cryptobinding TLV");
537		return -1;
538	}
539
540	if (result_tlv) {
541		int status, resp_status;
542		wpa_hexdump(MSG_DEBUG, "EAP-TLV: Result TLV",
543			    result_tlv, result_tlv_len);
544		if (result_tlv_len < 2) {
545			wpa_printf(MSG_INFO, "EAP-TLV: Too short Result TLV "
546				   "(len=%lu)",
547				   (unsigned long) result_tlv_len);
548			return -1;
549		}
550		status = WPA_GET_BE16(result_tlv);
551		if (status == EAP_TLV_RESULT_SUCCESS) {
552			wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Success "
553				   "- EAP-TLV/Phase2 Completed");
554			if (force_failure) {
555				wpa_printf(MSG_INFO, "EAP-TLV: Earlier failure"
556					   " - force failed Phase 2");
557				resp_status = EAP_TLV_RESULT_FAILURE;
558				ret->decision = DECISION_FAIL;
559			} else {
560				resp_status = EAP_TLV_RESULT_SUCCESS;
561				ret->decision = DECISION_UNCOND_SUCC;
562			}
563		} else if (status == EAP_TLV_RESULT_FAILURE) {
564			wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Failure");
565			resp_status = EAP_TLV_RESULT_FAILURE;
566			ret->decision = DECISION_FAIL;
567		} else {
568			wpa_printf(MSG_INFO, "EAP-TLV: Unknown TLV Result "
569				   "Status %d", status);
570			resp_status = EAP_TLV_RESULT_FAILURE;
571			ret->decision = DECISION_FAIL;
572		}
573		ret->methodState = METHOD_DONE;
574
575		*resp = eap_tlv_build_result(sm, data, crypto_tlv != NULL,
576					     eap_get_id(req), resp_status);
577	}
578
579	return 0;
580}
581
582
583static struct wpabuf * eap_peapv2_tlv_eap_payload(struct wpabuf *buf)
584{
585	struct wpabuf *e;
586	struct eap_tlv_hdr *tlv;
587
588	if (buf == NULL)
589		return NULL;
590
591	/* Encapsulate EAP packet in EAP-Payload TLV */
592	wpa_printf(MSG_DEBUG, "EAP-PEAPv2: Add EAP-Payload TLV");
593	e = wpabuf_alloc(sizeof(*tlv) + wpabuf_len(buf));
594	if (e == NULL) {
595		wpa_printf(MSG_DEBUG, "EAP-PEAPv2: Failed to allocate memory "
596			   "for TLV encapsulation");
597		wpabuf_free(buf);
598		return NULL;
599	}
600	tlv = wpabuf_put(e, sizeof(*tlv));
601	tlv->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
602				     EAP_TLV_EAP_PAYLOAD_TLV);
603	tlv->length = host_to_be16(wpabuf_len(buf));
604	wpabuf_put_buf(e, buf);
605	wpabuf_free(buf);
606	return e;
607}
608
609
610static int eap_peap_phase2_request(struct eap_sm *sm,
611				   struct eap_peap_data *data,
612				   struct eap_method_ret *ret,
613				   struct wpabuf *req,
614				   struct wpabuf **resp)
615{
616	struct eap_hdr *hdr = wpabuf_mhead(req);
617	size_t len = be_to_host16(hdr->length);
618	u8 *pos;
619	struct eap_method_ret iret;
620	struct eap_peer_config *config = eap_get_config(sm);
621
622	if (len <= sizeof(struct eap_hdr)) {
623		wpa_printf(MSG_INFO, "EAP-PEAP: too short "
624			   "Phase 2 request (len=%lu)", (unsigned long) len);
625		return -1;
626	}
627	pos = (u8 *) (hdr + 1);
628	wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Request: type=%d", *pos);
629	switch (*pos) {
630	case EAP_TYPE_IDENTITY:
631		*resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
632		break;
633	case EAP_TYPE_TLV:
634		os_memset(&iret, 0, sizeof(iret));
635		if (eap_tlv_process(sm, data, &iret, req, resp,
636				    data->phase2_eap_started &&
637				    !data->phase2_eap_success)) {
638			ret->methodState = METHOD_DONE;
639			ret->decision = DECISION_FAIL;
640			return -1;
641		}
642		if (iret.methodState == METHOD_DONE ||
643		    iret.methodState == METHOD_MAY_CONT) {
644			ret->methodState = iret.methodState;
645			ret->decision = iret.decision;
646			data->phase2_success = 1;
647		}
648		break;
649	case EAP_TYPE_EXPANDED:
650#ifdef EAP_TNC
651		if (data->soh) {
652			const u8 *epos;
653			size_t eleft;
654
655			epos = eap_hdr_validate(EAP_VENDOR_MICROSOFT, 0x21,
656						req, &eleft);
657			if (epos) {
658				struct wpabuf *buf;
659				wpa_printf(MSG_DEBUG,
660					   "EAP-PEAP: SoH EAP Extensions");
661				buf = tncc_process_soh_request(data->soh,
662							       epos, eleft);
663				if (buf) {
664					*resp = eap_msg_alloc(
665						EAP_VENDOR_MICROSOFT, 0x21,
666						wpabuf_len(buf),
667						EAP_CODE_RESPONSE,
668						hdr->identifier);
669					if (*resp == NULL) {
670						ret->methodState = METHOD_DONE;
671						ret->decision = DECISION_FAIL;
672						return -1;
673					}
674					wpabuf_put_buf(*resp, buf);
675					wpabuf_free(buf);
676					break;
677				}
678			}
679		}
680#endif /* EAP_TNC */
681		/* fall through */
682	default:
683		if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
684		    data->phase2_type.method == EAP_TYPE_NONE) {
685			size_t i;
686			for (i = 0; i < data->num_phase2_types; i++) {
687				if (data->phase2_types[i].vendor !=
688				    EAP_VENDOR_IETF ||
689				    data->phase2_types[i].method != *pos)
690					continue;
691
692				data->phase2_type.vendor =
693					data->phase2_types[i].vendor;
694				data->phase2_type.method =
695					data->phase2_types[i].method;
696				wpa_printf(MSG_DEBUG, "EAP-PEAP: Selected "
697					   "Phase 2 EAP vendor %d method %d",
698					   data->phase2_type.vendor,
699					   data->phase2_type.method);
700				break;
701			}
702		}
703		if (*pos != data->phase2_type.method ||
704		    *pos == EAP_TYPE_NONE) {
705			if (eap_peer_tls_phase2_nak(data->phase2_types,
706						    data->num_phase2_types,
707						    hdr, resp))
708				return -1;
709			return 0;
710		}
711
712		if (data->phase2_priv == NULL) {
713			data->phase2_method = eap_peer_get_eap_method(
714				data->phase2_type.vendor,
715				data->phase2_type.method);
716			if (data->phase2_method) {
717				sm->init_phase2 = 1;
718				data->phase2_priv =
719					data->phase2_method->init(sm);
720				sm->init_phase2 = 0;
721			}
722		}
723		if (data->phase2_priv == NULL || data->phase2_method == NULL) {
724			wpa_printf(MSG_INFO, "EAP-PEAP: failed to initialize "
725				   "Phase 2 EAP method %d", *pos);
726			ret->methodState = METHOD_DONE;
727			ret->decision = DECISION_FAIL;
728			return -1;
729		}
730		data->phase2_eap_started = 1;
731		os_memset(&iret, 0, sizeof(iret));
732		*resp = data->phase2_method->process(sm, data->phase2_priv,
733						     &iret, req);
734		if ((iret.methodState == METHOD_DONE ||
735		     iret.methodState == METHOD_MAY_CONT) &&
736		    (iret.decision == DECISION_UNCOND_SUCC ||
737		     iret.decision == DECISION_COND_SUCC)) {
738			data->phase2_eap_success = 1;
739			data->phase2_success = 1;
740		}
741		break;
742	}
743
744	if (*resp == NULL &&
745	    (config->pending_req_identity || config->pending_req_password ||
746	     config->pending_req_otp || config->pending_req_new_password)) {
747		wpabuf_free(data->pending_phase2_req);
748		data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
749	}
750
751	return 0;
752}
753
754
755static int eap_peap_decrypt(struct eap_sm *sm, struct eap_peap_data *data,
756			    struct eap_method_ret *ret,
757			    const struct eap_hdr *req,
758			    const struct wpabuf *in_data,
759			    struct wpabuf **out_data)
760{
761	struct wpabuf *in_decrypted = NULL;
762	int res, skip_change = 0;
763	struct eap_hdr *hdr, *rhdr;
764	struct wpabuf *resp = NULL;
765	size_t len;
766
767	wpa_printf(MSG_DEBUG, "EAP-PEAP: received %lu bytes encrypted data for"
768		   " Phase 2", (unsigned long) wpabuf_len(in_data));
769
770	if (data->pending_phase2_req) {
771		wpa_printf(MSG_DEBUG, "EAP-PEAP: Pending Phase 2 request - "
772			   "skip decryption and use old data");
773		/* Clear TLS reassembly state. */
774		eap_peer_tls_reset_input(&data->ssl);
775		in_decrypted = data->pending_phase2_req;
776		data->pending_phase2_req = NULL;
777		skip_change = 1;
778		goto continue_req;
779	}
780
781	if (wpabuf_len(in_data) == 0 && sm->workaround &&
782	    data->phase2_success) {
783		/*
784		 * Cisco ACS seems to be using TLS ACK to terminate
785		 * EAP-PEAPv0/GTC. Try to reply with TLS ACK.
786		 */
787		wpa_printf(MSG_DEBUG, "EAP-PEAP: Received TLS ACK, but "
788			   "expected data - acknowledge with TLS ACK since "
789			   "Phase 2 has been completed");
790		ret->decision = DECISION_COND_SUCC;
791		ret->methodState = METHOD_DONE;
792		return 1;
793	} else if (wpabuf_len(in_data) == 0) {
794		/* Received TLS ACK - requesting more fragments */
795		return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
796					    data->peap_version,
797					    req->identifier, NULL, out_data);
798	}
799
800	res = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
801	if (res)
802		return res;
803
804continue_req:
805	wpa_hexdump_buf(MSG_DEBUG, "EAP-PEAP: Decrypted Phase 2 EAP",
806			in_decrypted);
807
808	hdr = wpabuf_mhead(in_decrypted);
809	if (wpabuf_len(in_decrypted) == 5 && hdr->code == EAP_CODE_REQUEST &&
810	    be_to_host16(hdr->length) == 5 &&
811	    eap_get_type(in_decrypted) == EAP_TYPE_IDENTITY) {
812		/* At least FreeRADIUS seems to send full EAP header with
813		 * EAP Request Identity */
814		skip_change = 1;
815	}
816	if (wpabuf_len(in_decrypted) >= 5 && hdr->code == EAP_CODE_REQUEST &&
817	    eap_get_type(in_decrypted) == EAP_TYPE_TLV) {
818		skip_change = 1;
819	}
820
821	if (data->peap_version == 0 && !skip_change) {
822		struct eap_hdr *nhdr;
823		struct wpabuf *nmsg = wpabuf_alloc(sizeof(struct eap_hdr) +
824						   wpabuf_len(in_decrypted));
825		if (nmsg == NULL) {
826			wpabuf_free(in_decrypted);
827			return 0;
828		}
829		nhdr = wpabuf_put(nmsg, sizeof(*nhdr));
830		wpabuf_put_buf(nmsg, in_decrypted);
831		nhdr->code = req->code;
832		nhdr->identifier = req->identifier;
833		nhdr->length = host_to_be16(sizeof(struct eap_hdr) +
834					    wpabuf_len(in_decrypted));
835
836		wpabuf_free(in_decrypted);
837		in_decrypted = nmsg;
838	}
839
840	if (data->peap_version >= 2) {
841		struct eap_tlv_hdr *tlv;
842		struct wpabuf *nmsg;
843
844		if (wpabuf_len(in_decrypted) < sizeof(*tlv) + sizeof(*hdr)) {
845			wpa_printf(MSG_INFO, "EAP-PEAPv2: Too short Phase 2 "
846				   "EAP TLV");
847			wpabuf_free(in_decrypted);
848			return 0;
849		}
850		tlv = wpabuf_mhead(in_decrypted);
851		if ((be_to_host16(tlv->tlv_type) & 0x3fff) !=
852		    EAP_TLV_EAP_PAYLOAD_TLV) {
853			wpa_printf(MSG_INFO, "EAP-PEAPv2: Not an EAP TLV");
854			wpabuf_free(in_decrypted);
855			return 0;
856		}
857		if (sizeof(*tlv) + be_to_host16(tlv->length) >
858		    wpabuf_len(in_decrypted)) {
859			wpa_printf(MSG_INFO, "EAP-PEAPv2: Invalid EAP TLV "
860				   "length");
861			wpabuf_free(in_decrypted);
862			return 0;
863		}
864		hdr = (struct eap_hdr *) (tlv + 1);
865		if (be_to_host16(hdr->length) > be_to_host16(tlv->length)) {
866			wpa_printf(MSG_INFO, "EAP-PEAPv2: No room for full "
867				   "EAP packet in EAP TLV");
868			wpabuf_free(in_decrypted);
869			return 0;
870		}
871
872		nmsg = wpabuf_alloc(be_to_host16(hdr->length));
873		if (nmsg == NULL) {
874			wpabuf_free(in_decrypted);
875			return 0;
876		}
877
878		wpabuf_put_data(nmsg, hdr, be_to_host16(hdr->length));
879		wpabuf_free(in_decrypted);
880		in_decrypted = nmsg;
881	}
882
883	hdr = wpabuf_mhead(in_decrypted);
884	if (wpabuf_len(in_decrypted) < sizeof(*hdr)) {
885		wpa_printf(MSG_INFO, "EAP-PEAP: Too short Phase 2 "
886			   "EAP frame (len=%lu)",
887			   (unsigned long) wpabuf_len(in_decrypted));
888		wpabuf_free(in_decrypted);
889		return 0;
890	}
891	len = be_to_host16(hdr->length);
892	if (len > wpabuf_len(in_decrypted)) {
893		wpa_printf(MSG_INFO, "EAP-PEAP: Length mismatch in "
894			   "Phase 2 EAP frame (len=%lu hdr->length=%lu)",
895			   (unsigned long) wpabuf_len(in_decrypted),
896			   (unsigned long) len);
897		wpabuf_free(in_decrypted);
898		return 0;
899	}
900	if (len < wpabuf_len(in_decrypted)) {
901		wpa_printf(MSG_INFO, "EAP-PEAP: Odd.. Phase 2 EAP header has "
902			   "shorter length than full decrypted data "
903			   "(%lu < %lu)",
904			   (unsigned long) len,
905			   (unsigned long) wpabuf_len(in_decrypted));
906	}
907	wpa_printf(MSG_DEBUG, "EAP-PEAP: received Phase 2: code=%d "
908		   "identifier=%d length=%lu", hdr->code, hdr->identifier,
909		   (unsigned long) len);
910	switch (hdr->code) {
911	case EAP_CODE_REQUEST:
912		if (eap_peap_phase2_request(sm, data, ret, in_decrypted,
913					    &resp)) {
914			wpabuf_free(in_decrypted);
915			wpa_printf(MSG_INFO, "EAP-PEAP: Phase2 Request "
916				   "processing failed");
917			return 0;
918		}
919		break;
920	case EAP_CODE_SUCCESS:
921		wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Success");
922		if (data->peap_version == 1) {
923			/* EAP-Success within TLS tunnel is used to indicate
924			 * shutdown of the TLS channel. The authentication has
925			 * been completed. */
926			if (data->phase2_eap_started &&
927			    !data->phase2_eap_success) {
928				wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 "
929					   "Success used to indicate success, "
930					   "but Phase 2 EAP was not yet "
931					   "completed successfully");
932				ret->methodState = METHOD_DONE;
933				ret->decision = DECISION_FAIL;
934				wpabuf_free(in_decrypted);
935				return 0;
936			}
937			wpa_printf(MSG_DEBUG, "EAP-PEAP: Version 1 - "
938				   "EAP-Success within TLS tunnel - "
939				   "authentication completed");
940			ret->decision = DECISION_UNCOND_SUCC;
941			ret->methodState = METHOD_DONE;
942			data->phase2_success = 1;
943			if (data->peap_outer_success == 2) {
944				wpabuf_free(in_decrypted);
945				wpa_printf(MSG_DEBUG, "EAP-PEAP: Use TLS ACK "
946					   "to finish authentication");
947				return 1;
948			} else if (data->peap_outer_success == 1) {
949				/* Reply with EAP-Success within the TLS
950				 * channel to complete the authentication. */
951				resp = wpabuf_alloc(sizeof(struct eap_hdr));
952				if (resp) {
953					rhdr = wpabuf_put(resp, sizeof(*rhdr));
954					rhdr->code = EAP_CODE_SUCCESS;
955					rhdr->identifier = hdr->identifier;
956					rhdr->length =
957						host_to_be16(sizeof(*rhdr));
958				}
959			} else {
960				/* No EAP-Success expected for Phase 1 (outer,
961				 * unencrypted auth), so force EAP state
962				 * machine to SUCCESS state. */
963				sm->peap_done = TRUE;
964			}
965		} else {
966			/* FIX: ? */
967		}
968		break;
969	case EAP_CODE_FAILURE:
970		wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Failure");
971		ret->decision = DECISION_FAIL;
972		ret->methodState = METHOD_MAY_CONT;
973		ret->allowNotifications = FALSE;
974		/* Reply with EAP-Failure within the TLS channel to complete
975		 * failure reporting. */
976		resp = wpabuf_alloc(sizeof(struct eap_hdr));
977		if (resp) {
978			rhdr = wpabuf_put(resp, sizeof(*rhdr));
979			rhdr->code = EAP_CODE_FAILURE;
980			rhdr->identifier = hdr->identifier;
981			rhdr->length = host_to_be16(sizeof(*rhdr));
982		}
983		break;
984	default:
985		wpa_printf(MSG_INFO, "EAP-PEAP: Unexpected code=%d in "
986			   "Phase 2 EAP header", hdr->code);
987		break;
988	}
989
990	wpabuf_free(in_decrypted);
991
992	if (resp) {
993		int skip_change2 = 0;
994		struct wpabuf *rmsg, buf;
995
996		wpa_hexdump_buf_key(MSG_DEBUG,
997				    "EAP-PEAP: Encrypting Phase 2 data", resp);
998		/* PEAP version changes */
999		if (data->peap_version >= 2) {
1000			resp = eap_peapv2_tlv_eap_payload(resp);
1001			if (resp == NULL)
1002				return -1;
1003		}
1004		if (wpabuf_len(resp) >= 5 &&
1005		    wpabuf_head_u8(resp)[0] == EAP_CODE_RESPONSE &&
1006		    eap_get_type(resp) == EAP_TYPE_TLV)
1007			skip_change2 = 1;
1008		rmsg = resp;
1009		if (data->peap_version == 0 && !skip_change2) {
1010			wpabuf_set(&buf, wpabuf_head_u8(resp) +
1011				   sizeof(struct eap_hdr),
1012				   wpabuf_len(resp) - sizeof(struct eap_hdr));
1013			rmsg = &buf;
1014		}
1015
1016		if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
1017					 data->peap_version, req->identifier,
1018					 rmsg, out_data)) {
1019			wpa_printf(MSG_INFO, "EAP-PEAP: Failed to encrypt "
1020				   "a Phase 2 frame");
1021		}
1022		wpabuf_free(resp);
1023	}
1024
1025	return 0;
1026}
1027
1028
1029static struct wpabuf * eap_peap_process(struct eap_sm *sm, void *priv,
1030					struct eap_method_ret *ret,
1031					const struct wpabuf *reqData)
1032{
1033	const struct eap_hdr *req;
1034	size_t left;
1035	int res;
1036	u8 flags, id;
1037	struct wpabuf *resp;
1038	const u8 *pos;
1039	struct eap_peap_data *data = priv;
1040
1041	pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_PEAP, ret,
1042					reqData, &left, &flags);
1043	if (pos == NULL)
1044		return NULL;
1045	req = wpabuf_head(reqData);
1046	id = req->identifier;
1047
1048	if (flags & EAP_TLS_FLAGS_START) {
1049		wpa_printf(MSG_DEBUG, "EAP-PEAP: Start (server ver=%d, own "
1050			   "ver=%d)", flags & EAP_TLS_VERSION_MASK,
1051			data->peap_version);
1052		if ((flags & EAP_TLS_VERSION_MASK) < data->peap_version)
1053			data->peap_version = flags & EAP_TLS_VERSION_MASK;
1054		if (data->force_peap_version >= 0 &&
1055		    data->force_peap_version != data->peap_version) {
1056			wpa_printf(MSG_WARNING, "EAP-PEAP: Failed to select "
1057				   "forced PEAP version %d",
1058				   data->force_peap_version);
1059			ret->methodState = METHOD_DONE;
1060			ret->decision = DECISION_FAIL;
1061			ret->allowNotifications = FALSE;
1062			return NULL;
1063		}
1064		wpa_printf(MSG_DEBUG, "EAP-PEAP: Using PEAP version %d",
1065			   data->peap_version);
1066		left = 0; /* make sure that this frame is empty, even though it
1067			   * should always be, anyway */
1068	}
1069
1070	resp = NULL;
1071	if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1072	    !data->resuming) {
1073		struct wpabuf msg;
1074		wpabuf_set(&msg, pos, left);
1075		res = eap_peap_decrypt(sm, data, ret, req, &msg, &resp);
1076	} else {
1077		res = eap_peer_tls_process_helper(sm, &data->ssl,
1078						  EAP_TYPE_PEAP,
1079						  data->peap_version, id, pos,
1080						  left, &resp);
1081
1082		if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1083			char *label;
1084			wpa_printf(MSG_DEBUG,
1085				   "EAP-PEAP: TLS done, proceed to Phase 2");
1086			os_free(data->key_data);
1087			/* draft-josefsson-ppext-eap-tls-eap-05.txt
1088			 * specifies that PEAPv1 would use "client PEAP
1089			 * encryption" as the label. However, most existing
1090			 * PEAPv1 implementations seem to be using the old
1091			 * label, "client EAP encryption", instead. Use the old
1092			 * label by default, but allow it to be configured with
1093			 * phase1 parameter peaplabel=1. */
1094			if (data->peap_version > 1 || data->force_new_label)
1095				label = "client PEAP encryption";
1096			else
1097				label = "client EAP encryption";
1098			wpa_printf(MSG_DEBUG, "EAP-PEAP: using label '%s' in "
1099				   "key derivation", label);
1100			data->key_data =
1101				eap_peer_tls_derive_key(sm, &data->ssl, label,
1102							EAP_TLS_KEY_LEN);
1103			if (data->key_data) {
1104				wpa_hexdump_key(MSG_DEBUG,
1105						"EAP-PEAP: Derived key",
1106						data->key_data,
1107						EAP_TLS_KEY_LEN);
1108			} else {
1109				wpa_printf(MSG_DEBUG, "EAP-PEAP: Failed to "
1110					   "derive key");
1111			}
1112
1113			os_free(data->session_id);
1114			data->session_id =
1115				eap_peer_tls_derive_session_id(sm, &data->ssl,
1116							       EAP_TYPE_PEAP,
1117							       &data->id_len);
1118			if (data->session_id) {
1119				wpa_hexdump(MSG_DEBUG,
1120					    "EAP-PEAP: Derived Session-Id",
1121					    data->session_id, data->id_len);
1122			} else {
1123				wpa_printf(MSG_ERROR, "EAP-PEAP: Failed to "
1124					   "derive Session-Id");
1125			}
1126
1127			if (sm->workaround && data->resuming) {
1128				/*
1129				 * At least few RADIUS servers (Aegis v1.1.6;
1130				 * but not v1.1.4; and Cisco ACS) seem to be
1131				 * terminating PEAPv1 (Aegis) or PEAPv0 (Cisco
1132				 * ACS) session resumption with outer
1133				 * EAP-Success. This does not seem to follow
1134				 * draft-josefsson-pppext-eap-tls-eap-05.txt
1135				 * section 4.2, so only allow this if EAP
1136				 * workarounds are enabled.
1137				 */
1138				wpa_printf(MSG_DEBUG, "EAP-PEAP: Workaround - "
1139					   "allow outer EAP-Success to "
1140					   "terminate PEAP resumption");
1141				ret->decision = DECISION_COND_SUCC;
1142				data->phase2_success = 1;
1143			}
1144
1145			data->resuming = 0;
1146		}
1147
1148		if (res == 2) {
1149			struct wpabuf msg;
1150			/*
1151			 * Application data included in the handshake message.
1152			 */
1153			wpabuf_free(data->pending_phase2_req);
1154			data->pending_phase2_req = resp;
1155			resp = NULL;
1156			wpabuf_set(&msg, pos, left);
1157			res = eap_peap_decrypt(sm, data, ret, req, &msg,
1158					       &resp);
1159		}
1160	}
1161
1162	if (ret->methodState == METHOD_DONE) {
1163		ret->allowNotifications = FALSE;
1164	}
1165
1166	if (res == 1) {
1167		wpabuf_free(resp);
1168		return eap_peer_tls_build_ack(id, EAP_TYPE_PEAP,
1169					      data->peap_version);
1170	}
1171
1172	return resp;
1173}
1174
1175
1176static Boolean eap_peap_has_reauth_data(struct eap_sm *sm, void *priv)
1177{
1178	struct eap_peap_data *data = priv;
1179	return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1180		data->phase2_success;
1181}
1182
1183
1184static void eap_peap_deinit_for_reauth(struct eap_sm *sm, void *priv)
1185{
1186	struct eap_peap_data *data = priv;
1187	wpabuf_free(data->pending_phase2_req);
1188	data->pending_phase2_req = NULL;
1189	data->crypto_binding_used = 0;
1190}
1191
1192
1193static void * eap_peap_init_for_reauth(struct eap_sm *sm, void *priv)
1194{
1195	struct eap_peap_data *data = priv;
1196	os_free(data->key_data);
1197	data->key_data = NULL;
1198	os_free(data->session_id);
1199	data->session_id = NULL;
1200	if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1201		os_free(data);
1202		return NULL;
1203	}
1204	if (data->phase2_priv && data->phase2_method &&
1205	    data->phase2_method->init_for_reauth)
1206		data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1207	data->phase2_success = 0;
1208	data->phase2_eap_success = 0;
1209	data->phase2_eap_started = 0;
1210	data->resuming = 1;
1211	data->reauth = 1;
1212	sm->peap_done = FALSE;
1213	return priv;
1214}
1215
1216
1217static int eap_peap_get_status(struct eap_sm *sm, void *priv, char *buf,
1218			       size_t buflen, int verbose)
1219{
1220	struct eap_peap_data *data = priv;
1221	int len, ret;
1222
1223	len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1224	if (data->phase2_method) {
1225		ret = os_snprintf(buf + len, buflen - len,
1226				  "EAP-PEAPv%d Phase2 method=%s\n",
1227				  data->peap_version,
1228				  data->phase2_method->name);
1229		if (ret < 0 || (size_t) ret >= buflen - len)
1230			return len;
1231		len += ret;
1232	}
1233	return len;
1234}
1235
1236
1237static Boolean eap_peap_isKeyAvailable(struct eap_sm *sm, void *priv)
1238{
1239	struct eap_peap_data *data = priv;
1240	return data->key_data != NULL && data->phase2_success;
1241}
1242
1243
1244static u8 * eap_peap_getKey(struct eap_sm *sm, void *priv, size_t *len)
1245{
1246	struct eap_peap_data *data = priv;
1247	u8 *key;
1248
1249	if (data->key_data == NULL || !data->phase2_success)
1250		return NULL;
1251
1252	key = os_malloc(EAP_TLS_KEY_LEN);
1253	if (key == NULL)
1254		return NULL;
1255
1256	*len = EAP_TLS_KEY_LEN;
1257
1258	if (data->crypto_binding_used) {
1259		u8 csk[128];
1260		/*
1261		 * Note: It looks like Microsoft implementation requires null
1262		 * termination for this label while the one used for deriving
1263		 * IPMK|CMK did not use null termination.
1264		 */
1265		if (peap_prfplus(data->peap_version, data->ipmk, 40,
1266				 "Session Key Generating Function",
1267				 (u8 *) "\00", 1, csk, sizeof(csk)) < 0) {
1268			os_free(key);
1269			return NULL;
1270		}
1271		wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CSK", csk, sizeof(csk));
1272		os_memcpy(key, csk, EAP_TLS_KEY_LEN);
1273		wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Derived key",
1274			    key, EAP_TLS_KEY_LEN);
1275	} else
1276		os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
1277
1278	return key;
1279}
1280
1281
1282static u8 * eap_peap_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1283{
1284	struct eap_peap_data *data = priv;
1285	u8 *id;
1286
1287	if (data->session_id == NULL || !data->phase2_success)
1288		return NULL;
1289
1290	id = os_malloc(data->id_len);
1291	if (id == NULL)
1292		return NULL;
1293
1294	*len = data->id_len;
1295	os_memcpy(id, data->session_id, data->id_len);
1296
1297	return id;
1298}
1299
1300
1301int eap_peer_peap_register(void)
1302{
1303	struct eap_method *eap;
1304	int ret;
1305
1306	eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1307				    EAP_VENDOR_IETF, EAP_TYPE_PEAP, "PEAP");
1308	if (eap == NULL)
1309		return -1;
1310
1311	eap->init = eap_peap_init;
1312	eap->deinit = eap_peap_deinit;
1313	eap->process = eap_peap_process;
1314	eap->isKeyAvailable = eap_peap_isKeyAvailable;
1315	eap->getKey = eap_peap_getKey;
1316	eap->get_status = eap_peap_get_status;
1317	eap->has_reauth_data = eap_peap_has_reauth_data;
1318	eap->deinit_for_reauth = eap_peap_deinit_for_reauth;
1319	eap->init_for_reauth = eap_peap_init_for_reauth;
1320	eap->getSessionId = eap_peap_get_session_id;
1321
1322	ret = eap_peer_method_register(eap);
1323	if (ret)
1324		eap_peer_method_free(eap);
1325	return ret;
1326}
1327