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revert between 56095 -> 55830 in arch
[AROS.git] / workbench / network / WirelessManager / src / eap_peer / eap_peap.c
blob2b72084e5433751981cac2d2ed5980f1bb7a67fe
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 program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16
17 #include "common.h"
18 #include "crypto/sha1.h"
19 #include "crypto/tls.h"
20 #include "eap_common/eap_tlv_common.h"
21 #include "eap_common/eap_peap_common.h"
22 #include "eap_i.h"
23 #include "eap_tls_common.h"
24 #include "eap_config.h"
25 #include "tncc.h"
26
27
28 /* Maximum supported PEAP version
29 * 0 = Microsoft's PEAP version 0; draft-kamath-pppext-peapv0-00.txt
30 * 1 = draft-josefsson-ppext-eap-tls-eap-05.txt
31 * 2 = draft-josefsson-ppext-eap-tls-eap-10.txt
32 */
33 #define EAP_PEAP_VERSION 1
34
35
36 static void eap_peap_deinit(struct eap_sm *sm, void *priv);
37
38
39 struct eap_peap_data {
40 struct eap_ssl_data ssl;
41
42 int peap_version, force_peap_version, force_new_label;
43
44 const struct eap_method *phase2_method;
45 void *phase2_priv;
46 int phase2_success;
47 int phase2_eap_success;
48 int phase2_eap_started;
49
50 struct eap_method_type phase2_type;
51 struct eap_method_type *phase2_types;
52 size_t num_phase2_types;
53
54 int peap_outer_success; /* 0 = PEAP terminated on Phase 2 inner
55 * EAP-Success
56 * 1 = reply with tunneled EAP-Success to inner
57 * EAP-Success and expect AS to send outer
58 * (unencrypted) EAP-Success after this
59 * 2 = reply with PEAP/TLS ACK to inner
60 * EAP-Success and expect AS to send outer
61 * (unencrypted) EAP-Success after this */
62 int resuming; /* starting a resumed session */
63 int reauth; /* reauthentication */
64 u8 *key_data;
65
66 struct wpabuf *pending_phase2_req;
67 enum { NO_BINDING, OPTIONAL_BINDING, REQUIRE_BINDING } crypto_binding;
68 int crypto_binding_used;
69 u8 binding_nonce[32];
70 u8 ipmk[40];
71 u8 cmk[20];
72 int soh; /* Whether IF-TNCCS-SOH (Statement of Health; Microsoft NAP)
73 * is enabled. */
74 };
75
76
77 static int eap_peap_parse_phase1(struct eap_peap_data *data,
78 const char *phase1)
79 {
80 const char *pos;
81
82 pos = os_strstr(phase1, "peapver=");
83 if (pos) {
84 data->force_peap_version = atoi(pos + 8);
85 data->peap_version = data->force_peap_version;
86 wpa_printf(MSG_DEBUG, "EAP-PEAP: Forced PEAP version %d",
87 data->force_peap_version);
88 }
89
90 if (os_strstr(phase1, "peaplabel=1")) {
91 data->force_new_label = 1;
92 wpa_printf(MSG_DEBUG, "EAP-PEAP: Force new label for key "
93 "derivation");
94 }
95
96 if (os_strstr(phase1, "peap_outer_success=0")) {
97 data->peap_outer_success = 0;
98 wpa_printf(MSG_DEBUG, "EAP-PEAP: terminate authentication on "
99 "tunneled EAP-Success");
100 } else if (os_strstr(phase1, "peap_outer_success=1")) {
101 data->peap_outer_success = 1;
102 wpa_printf(MSG_DEBUG, "EAP-PEAP: send tunneled EAP-Success "
103 "after receiving tunneled EAP-Success");
104 } else if (os_strstr(phase1, "peap_outer_success=2")) {
105 data->peap_outer_success = 2;
106 wpa_printf(MSG_DEBUG, "EAP-PEAP: send PEAP/TLS ACK after "
107 "receiving tunneled EAP-Success");
108 }
109
110 if (os_strstr(phase1, "crypto_binding=0")) {
111 data->crypto_binding = NO_BINDING;
112 wpa_printf(MSG_DEBUG, "EAP-PEAP: Do not use cryptobinding");
113 } else if (os_strstr(phase1, "crypto_binding=1")) {
114 data->crypto_binding = OPTIONAL_BINDING;
115 wpa_printf(MSG_DEBUG, "EAP-PEAP: Optional cryptobinding");
116 } else if (os_strstr(phase1, "crypto_binding=2")) {
117 data->crypto_binding = REQUIRE_BINDING;
118 wpa_printf(MSG_DEBUG, "EAP-PEAP: Require cryptobinding");
119 }
120
121 #ifdef EAP_TNC
122 if (os_strstr(phase1, "tnc=soh2")) {
123 data->soh = 2;
124 wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 2 enabled");
125 } else if (os_strstr(phase1, "tnc=soh1")) {
126 data->soh = 1;
127 wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 1 enabled");
128 } else if (os_strstr(phase1, "tnc=soh")) {
129 data->soh = 2;
130 wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 2 enabled");
131 }
132 #endif /* EAP_TNC */
133
134 return 0;
135 }
136
137
138 static void * eap_peap_init(struct eap_sm *sm)
139 {
140 struct eap_peap_data *data;
141 struct eap_peer_config *config = eap_get_config(sm);
142
143 data = os_zalloc(sizeof(*data));
144 if (data == NULL)
145 return NULL;
146 sm->peap_done = FALSE;
147 data->peap_version = EAP_PEAP_VERSION;
148 data->force_peap_version = -1;
149 data->peap_outer_success = 2;
150 data->crypto_binding = OPTIONAL_BINDING;
151
152 if (config && config->phase1 &&
153 eap_peap_parse_phase1(data, config->phase1) < 0) {
154 eap_peap_deinit(sm, data);
155 return NULL;
156 }
157
158 if (eap_peer_select_phase2_methods(config, "auth=",
159 &data->phase2_types,
160 &data->num_phase2_types) < 0) {
161 eap_peap_deinit(sm, data);
162 return NULL;
163 }
164
165 data->phase2_type.vendor = EAP_VENDOR_IETF;
166 data->phase2_type.method = EAP_TYPE_NONE;
167
168 if (eap_peer_tls_ssl_init(sm, &data->ssl, config)) {
169 wpa_printf(MSG_INFO, "EAP-PEAP: Failed to initialize SSL.");
170 eap_peap_deinit(sm, data);
171 return NULL;
172 }
173
174 return data;
175 }
176
177
178 static void eap_peap_deinit(struct eap_sm *sm, void *priv)
179 {
180 struct eap_peap_data *data = priv;
181 if (data == NULL)
182 return;
183 if (data->phase2_priv && data->phase2_method)
184 data->phase2_method->deinit(sm, data->phase2_priv);
185 os_free(data->phase2_types);
186 eap_peer_tls_ssl_deinit(sm, &data->ssl);
187 os_free(data->key_data);
188 wpabuf_free(data->pending_phase2_req);
189 os_free(data);
190 }
191
192
193 /**
194 * eap_tlv_build_nak - Build EAP-TLV NAK message
195 * @id: EAP identifier for the header
196 * @nak_type: TLV type (EAP_TLV_*)
197 * Returns: Buffer to the allocated EAP-TLV NAK message or %NULL on failure
198 *
199 * This funtion builds an EAP-TLV NAK message. The caller is responsible for
200 * freeing the returned buffer.
201 */
202 static struct wpabuf * eap_tlv_build_nak(int id, u16 nak_type)
203 {
204 struct wpabuf *msg;
205
206 msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, 10,
207 EAP_CODE_RESPONSE, id);
208 if (msg == NULL)
209 return NULL;
210
211 wpabuf_put_u8(msg, 0x80); /* Mandatory */
212 wpabuf_put_u8(msg, EAP_TLV_NAK_TLV);
213 wpabuf_put_be16(msg, 6); /* Length */
214 wpabuf_put_be32(msg, 0); /* Vendor-Id */
215 wpabuf_put_be16(msg, nak_type); /* NAK-Type */
216
217 return msg;
218 }
219
220
221 static int eap_peap_get_isk(struct eap_sm *sm, struct eap_peap_data *data,
222 u8 *isk, size_t isk_len)
223 {
224 u8 *key;
225 size_t key_len;
226
227 os_memset(isk, 0, isk_len);
228 if (data->phase2_method == NULL || data->phase2_priv == NULL ||
229 data->phase2_method->isKeyAvailable == NULL ||
230 data->phase2_method->getKey == NULL)
231 return 0;
232
233 if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
234 (key = data->phase2_method->getKey(sm, data->phase2_priv,
235 &key_len)) == NULL) {
236 wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not get key material "
237 "from Phase 2");
238 return -1;
239 }
240
241 if (key_len > isk_len)
242 key_len = isk_len;
243 os_memcpy(isk, key, key_len);
244 os_free(key);
245
246 return 0;
247 }
248
249
250 static int eap_peap_derive_cmk(struct eap_sm *sm, struct eap_peap_data *data)
251 {
252 u8 *tk;
253 u8 isk[32], imck[60];
254
255 /*
256 * Tunnel key (TK) is the first 60 octets of the key generated by
257 * phase 1 of PEAP (based on TLS).
258 */
259 tk = data->key_data;
260 if (tk == NULL)
261 return -1;
262 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TK", tk, 60);
263
264 if (data->reauth &&
265 tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
266 /* Fast-connect: IPMK|CMK = TK */
267 os_memcpy(data->ipmk, tk, 40);
268 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK from TK",
269 data->ipmk, 40);
270 os_memcpy(data->cmk, tk + 40, 20);
271 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK from TK",
272 data->cmk, 20);
273 return 0;
274 }
275
276 if (eap_peap_get_isk(sm, data, isk, sizeof(isk)) < 0)
277 return -1;
278 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: ISK", isk, sizeof(isk));
279
280 /*
281 * IPMK Seed = "Inner Methods Compound Keys" | ISK
282 * TempKey = First 40 octets of TK
283 * IPMK|CMK = PRF+(TempKey, IPMK Seed, 60)
284 * (note: draft-josefsson-pppext-eap-tls-eap-10.txt includes a space
285 * in the end of the label just before ISK; is that just a typo?)
286 */
287 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TempKey", tk, 40);
288 peap_prfplus(data->peap_version, tk, 40, "Inner Methods Compound Keys",
289 isk, sizeof(isk), imck, sizeof(imck));
290 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IMCK (IPMKj)",
291 imck, sizeof(imck));
292
293 os_memcpy(data->ipmk, imck, 40);
294 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK (S-IPMKj)", data->ipmk, 40);
295 os_memcpy(data->cmk, imck + 40, 20);
296 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK (CMKj)", data->cmk, 20);
297
298 return 0;
299 }
300
301
302 static int eap_tlv_add_cryptobinding(struct eap_sm *sm,
303 struct eap_peap_data *data,
304 struct wpabuf *buf)
305 {
306 u8 *mac;
307 u8 eap_type = EAP_TYPE_PEAP;
308 const u8 *addr[2];
309 size_t len[2];
310 u16 tlv_type;
311
312 /* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
313 addr[0] = wpabuf_put(buf, 0);
314 len[0] = 60;
315 addr[1] = &eap_type;
316 len[1] = 1;
317
318 tlv_type = EAP_TLV_CRYPTO_BINDING_TLV;
319 if (data->peap_version >= 2)
320 tlv_type |= EAP_TLV_TYPE_MANDATORY;
321 wpabuf_put_be16(buf, tlv_type);
322 wpabuf_put_be16(buf, 56);
323
324 wpabuf_put_u8(buf, 0); /* Reserved */
325 wpabuf_put_u8(buf, data->peap_version); /* Version */
326 wpabuf_put_u8(buf, data->peap_version); /* RecvVersion */
327 wpabuf_put_u8(buf, 1); /* SubType: 0 = Request, 1 = Response */
328 wpabuf_put_data(buf, data->binding_nonce, 32); /* Nonce */
329 mac = wpabuf_put(buf, 20); /* Compound_MAC */
330 wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC CMK", data->cmk, 20);
331 wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 1",
332 addr[0], len[0]);
333 wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 2",
334 addr[1], len[1]);
335 hmac_sha1_vector(data->cmk, 20, 2, addr, len, mac);
336 wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC", mac, SHA1_MAC_LEN);
337 data->crypto_binding_used = 1;
338
339 return 0;
340 }
341
342
343 /**
344 * eap_tlv_build_result - Build EAP-TLV Result message
345 * @id: EAP identifier for the header
346 * @status: Status (EAP_TLV_RESULT_SUCCESS or EAP_TLV_RESULT_FAILURE)
347 * Returns: Buffer to the allocated EAP-TLV Result message or %NULL on failure
348 *
349 * This funtion builds an EAP-TLV Result message. The caller is responsible for
350 * freeing the returned buffer.
351 */
352 static struct wpabuf * eap_tlv_build_result(struct eap_sm *sm,
353 struct eap_peap_data *data,
354 int crypto_tlv_used,
355 int id, u16 status)
356 {
357 struct wpabuf *msg;
358 size_t len;
359
360 if (data->crypto_binding == NO_BINDING)
361 crypto_tlv_used = 0;
362
363 len = 6;
364 if (crypto_tlv_used)
365 len += 60; /* Cryptobinding TLV */
366 msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, len,
367 EAP_CODE_RESPONSE, id);
368 if (msg == NULL)
369 return NULL;
370
371 wpabuf_put_u8(msg, 0x80); /* Mandatory */
372 wpabuf_put_u8(msg, EAP_TLV_RESULT_TLV);
373 wpabuf_put_be16(msg, 2); /* Length */
374 wpabuf_put_be16(msg, status); /* Status */
375
376 if (crypto_tlv_used && eap_tlv_add_cryptobinding(sm, data, msg)) {
377 wpabuf_free(msg);
378 return NULL;
379 }
380
381 return msg;
382 }
383
384
385 static int eap_tlv_validate_cryptobinding(struct eap_sm *sm,
386 struct eap_peap_data *data,
387 const u8 *crypto_tlv,
388 size_t crypto_tlv_len)
389 {
390 u8 buf[61], mac[SHA1_MAC_LEN];
391 const u8 *pos;
392
393 if (eap_peap_derive_cmk(sm, data) < 0) {
394 wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not derive CMK");
395 return -1;
396 }
397
398 if (crypto_tlv_len != 4 + 56) {
399 wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid cryptobinding TLV "
400 "length %d", (int) crypto_tlv_len);
401 return -1;
402 }
403
404 pos = crypto_tlv;
405 pos += 4; /* TLV header */
406 if (pos[1] != data->peap_version) {
407 wpa_printf(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV Version "
408 "mismatch (was %d; expected %d)",
409 pos[1], data->peap_version);
410 return -1;
411 }
412
413 if (pos[3] != 0) {
414 wpa_printf(MSG_DEBUG, "EAP-PEAP: Unexpected Cryptobinding TLV "
415 "SubType %d", pos[3]);
416 return -1;
417 }
418 pos += 4;
419 os_memcpy(data->binding_nonce, pos, 32);
420 pos += 32; /* Nonce */
421
422 /* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
423 os_memcpy(buf, crypto_tlv, 60);
424 os_memset(buf + 4 + 4 + 32, 0, 20); /* Compound_MAC */
425 buf[60] = EAP_TYPE_PEAP;
426 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Compound_MAC data",
427 buf, sizeof(buf));
428 hmac_sha1(data->cmk, 20, buf, sizeof(buf), mac);
429
430 if (os_memcmp(mac, pos, SHA1_MAC_LEN) != 0) {
431 wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid Compound_MAC in "
432 "cryptobinding TLV");
433 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Received MAC",
434 pos, SHA1_MAC_LEN);
435 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Expected MAC",
436 mac, SHA1_MAC_LEN);
437 return -1;
438 }
439
440 wpa_printf(MSG_DEBUG, "EAP-PEAP: Valid cryptobinding TLV received");
441
442 return 0;
443 }
444
445
446 /**
447 * eap_tlv_process - Process a received EAP-TLV message and generate a response
448 * @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
449 * @ret: Return values from EAP request validation and processing
450 * @req: EAP-TLV request to be processed. The caller must have validated that
451 * the buffer is large enough to contain full request (hdr->length bytes) and
452 * that the EAP type is EAP_TYPE_TLV.
453 * @resp: Buffer to return a pointer to the allocated response message. This
454 * field should be initialized to %NULL before the call. The value will be
455 * updated if a response message is generated. The caller is responsible for
456 * freeing the allocated message.
457 * @force_failure: Force negotiation to fail
458 * Returns: 0 on success, -1 on failure
459 */
460 static int eap_tlv_process(struct eap_sm *sm, struct eap_peap_data *data,
461 struct eap_method_ret *ret,
462 const struct wpabuf *req, struct wpabuf **resp,
463 int force_failure)
464 {
465 size_t left, tlv_len;
466 const u8 *pos;
467 const u8 *result_tlv = NULL, *crypto_tlv = NULL;
468 size_t result_tlv_len = 0, crypto_tlv_len = 0;
469 int tlv_type, mandatory;
470
471 /* Parse TLVs */
472 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_TLV, req, &left);
473 if (pos == NULL)
474 return -1;
475 wpa_hexdump(MSG_DEBUG, "EAP-TLV: Received TLVs", pos, left);
476 while (left >= 4) {
477 mandatory = !!(pos[0] & 0x80);
478 tlv_type = WPA_GET_BE16(pos) & 0x3fff;
479 pos += 2;
480 tlv_len = WPA_GET_BE16(pos);
481 pos += 2;
482 left -= 4;
483 if (tlv_len > left) {
484 wpa_printf(MSG_DEBUG, "EAP-TLV: TLV underrun "
485 "(tlv_len=%lu left=%lu)",
486 (unsigned long) tlv_len,
487 (unsigned long) left);
488 return -1;
489 }
490 switch (tlv_type) {
491 case EAP_TLV_RESULT_TLV:
492 result_tlv = pos;
493 result_tlv_len = tlv_len;
494 break;
495 case EAP_TLV_CRYPTO_BINDING_TLV:
496 crypto_tlv = pos;
497 crypto_tlv_len = tlv_len;
498 break;
499 default:
500 wpa_printf(MSG_DEBUG, "EAP-TLV: Unsupported TLV Type "
501 "%d%s", tlv_type,
502 mandatory ? " (mandatory)" : "");
503 if (mandatory) {
504 /* NAK TLV and ignore all TLVs in this packet.
505 */
506 *resp = eap_tlv_build_nak(eap_get_id(req),
507 tlv_type);
508 return *resp == NULL ? -1 : 0;
509 }
510 /* Ignore this TLV, but process other TLVs */
511 break;
512 }
513
514 pos += tlv_len;
515 left -= tlv_len;
516 }
517 if (left) {
518 wpa_printf(MSG_DEBUG, "EAP-TLV: Last TLV too short in "
519 "Request (left=%lu)", (unsigned long) left);
520 return -1;
521 }
522
523 /* Process supported TLVs */
524 if (crypto_tlv && data->crypto_binding != NO_BINDING) {
525 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV",
526 crypto_tlv, crypto_tlv_len);
527 if (eap_tlv_validate_cryptobinding(sm, data, crypto_tlv - 4,
528 crypto_tlv_len + 4) < 0) {
529 if (result_tlv == NULL)
530 return -1;
531 force_failure = 1;
532 crypto_tlv = NULL; /* do not include Cryptobinding TLV
533 * in response, if the received
534 * cryptobinding was invalid. */
535 }
536 } else if (!crypto_tlv && data->crypto_binding == REQUIRE_BINDING) {
537 wpa_printf(MSG_DEBUG, "EAP-PEAP: No cryptobinding TLV");
538 return -1;
539 }
540
541 if (result_tlv) {
542 int status, resp_status;
543 wpa_hexdump(MSG_DEBUG, "EAP-TLV: Result TLV",
544 result_tlv, result_tlv_len);
545 if (result_tlv_len < 2) {
546 wpa_printf(MSG_INFO, "EAP-TLV: Too short Result TLV "
547 "(len=%lu)",
548 (unsigned long) result_tlv_len);
549 return -1;
550 }
551 status = WPA_GET_BE16(result_tlv);
552 if (status == EAP_TLV_RESULT_SUCCESS) {
553 wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Success "
554 "- EAP-TLV/Phase2 Completed");
555 if (force_failure) {
556 wpa_printf(MSG_INFO, "EAP-TLV: Earlier failure"
557 " - force failed Phase 2");
558 resp_status = EAP_TLV_RESULT_FAILURE;
559 ret->decision = DECISION_FAIL;
560 } else {
561 resp_status = EAP_TLV_RESULT_SUCCESS;
562 ret->decision = DECISION_UNCOND_SUCC;
563 }
564 } else if (status == EAP_TLV_RESULT_FAILURE) {
565 wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Failure");
566 resp_status = EAP_TLV_RESULT_FAILURE;
567 ret->decision = DECISION_FAIL;
568 } else {
569 wpa_printf(MSG_INFO, "EAP-TLV: Unknown TLV Result "
570 "Status %d", status);
571 resp_status = EAP_TLV_RESULT_FAILURE;
572 ret->decision = DECISION_FAIL;
573 }
574 ret->methodState = METHOD_DONE;
575
576 *resp = eap_tlv_build_result(sm, data, crypto_tlv != NULL,
577 eap_get_id(req), resp_status);
578 }
579
580 return 0;
581 }
582
583
584 static struct wpabuf * eap_peapv2_tlv_eap_payload(struct wpabuf *buf)
585 {
586 struct wpabuf *e;
587 struct eap_tlv_hdr *tlv;
588
589 if (buf == NULL)
590 return NULL;
591
592 /* Encapsulate EAP packet in EAP-Payload TLV */
593 wpa_printf(MSG_DEBUG, "EAP-PEAPv2: Add EAP-Payload TLV");
594 e = wpabuf_alloc(sizeof(*tlv) + wpabuf_len(buf));
595 if (e == NULL) {
596 wpa_printf(MSG_DEBUG, "EAP-PEAPv2: Failed to allocate memory "
597 "for TLV encapsulation");
598 wpabuf_free(buf);
599 return NULL;
600 }
601 tlv = wpabuf_put(e, sizeof(*tlv));
602 tlv->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
603 EAP_TLV_EAP_PAYLOAD_TLV);
604 tlv->length = host_to_be16(wpabuf_len(buf));
605 wpabuf_put_buf(e, buf);
606 wpabuf_free(buf);
607 return e;
608 }
609
610
611 static int eap_peap_phase2_request(struct eap_sm *sm,
612 struct eap_peap_data *data,
613 struct eap_method_ret *ret,
614 struct wpabuf *req,
615 struct wpabuf **resp)
616 {
617 struct eap_hdr *hdr = wpabuf_mhead(req);
618 size_t len = be_to_host16(hdr->length);
619 u8 *pos;
620 struct eap_method_ret iret;
621 struct eap_peer_config *config = eap_get_config(sm);
622
623 if (len <= sizeof(struct eap_hdr)) {
624 wpa_printf(MSG_INFO, "EAP-PEAP: too short "
625 "Phase 2 request (len=%lu)", (unsigned long) len);
626 return -1;
627 }
628 pos = (u8 *) (hdr + 1);
629 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Request: type=%d", *pos);
630 switch (*pos) {
631 case EAP_TYPE_IDENTITY:
632 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
633 break;
634 case EAP_TYPE_TLV:
635 os_memset(&iret, 0, sizeof(iret));
636 if (eap_tlv_process(sm, data, &iret, req, resp,
637 data->phase2_eap_started &&
638 !data->phase2_eap_success)) {
639 ret->methodState = METHOD_DONE;
640 ret->decision = DECISION_FAIL;
641 return -1;
642 }
643 if (iret.methodState == METHOD_DONE ||
644 iret.methodState == METHOD_MAY_CONT) {
645 ret->methodState = iret.methodState;
646 ret->decision = iret.decision;
647 data->phase2_success = 1;
648 }
649 break;
650 case EAP_TYPE_EXPANDED:
651 #ifdef EAP_TNC
652 if (data->soh) {
653 const u8 *epos;
654 size_t eleft;
655
656 epos = eap_hdr_validate(EAP_VENDOR_MICROSOFT, 0x21,
657 req, &eleft);
658 if (epos) {
659 struct wpabuf *buf;
660 wpa_printf(MSG_DEBUG,
661 "EAP-PEAP: SoH EAP Extensions");
662 buf = tncc_process_soh_request(data->soh,
663 epos, eleft);
664 if (buf) {
665 *resp = eap_msg_alloc(
666 EAP_VENDOR_MICROSOFT, 0x21,
667 wpabuf_len(buf),
668 EAP_CODE_RESPONSE,
669 hdr->identifier);
670 if (*resp == NULL) {
671 ret->methodState = METHOD_DONE;
672 ret->decision = DECISION_FAIL;
673 return -1;
674 }
675 wpabuf_put_buf(*resp, buf);
676 wpabuf_free(buf);
677 break;
678 }
679 }
680 }
681 #endif /* EAP_TNC */
682 /* fall through */
683 default:
684 if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
685 data->phase2_type.method == EAP_TYPE_NONE) {
686 size_t i;
687 for (i = 0; i < data->num_phase2_types; i++) {
688 if (data->phase2_types[i].vendor !=
689 EAP_VENDOR_IETF ||
690 data->phase2_types[i].method != *pos)
691 continue;
692
693 data->phase2_type.vendor =
694 data->phase2_types[i].vendor;
695 data->phase2_type.method =
696 data->phase2_types[i].method;
697 wpa_printf(MSG_DEBUG, "EAP-PEAP: Selected "
698 "Phase 2 EAP vendor %d method %d",
699 data->phase2_type.vendor,
700 data->phase2_type.method);
701 break;
702 }
703 }
704 if (*pos != data->phase2_type.method ||
705 *pos == EAP_TYPE_NONE) {
706 if (eap_peer_tls_phase2_nak(data->phase2_types,
707 data->num_phase2_types,
708 hdr, resp))
709 return -1;
710 return 0;
711 }
712
713 if (data->phase2_priv == NULL) {
714 data->phase2_method = eap_peer_get_eap_method(
715 data->phase2_type.vendor,
716 data->phase2_type.method);
717 if (data->phase2_method) {
718 sm->init_phase2 = 1;
719 data->phase2_priv =
720 data->phase2_method->init(sm);
721 sm->init_phase2 = 0;
722 }
723 }
724 if (data->phase2_priv == NULL || data->phase2_method == NULL) {
725 wpa_printf(MSG_INFO, "EAP-PEAP: failed to initialize "
726 "Phase 2 EAP method %d", *pos);
727 ret->methodState = METHOD_DONE;
728 ret->decision = DECISION_FAIL;
729 return -1;
730 }
731 data->phase2_eap_started = 1;
732 os_memset(&iret, 0, sizeof(iret));
733 *resp = data->phase2_method->process(sm, data->phase2_priv,
734 &iret, req);
735 if ((iret.methodState == METHOD_DONE ||
736 iret.methodState == METHOD_MAY_CONT) &&
737 (iret.decision == DECISION_UNCOND_SUCC ||
738 iret.decision == DECISION_COND_SUCC)) {
739 data->phase2_eap_success = 1;
740 data->phase2_success = 1;
741 }
742 break;
743 }
744
745 if (*resp == NULL &&
746 (config->pending_req_identity || config->pending_req_password ||
747 config->pending_req_otp || config->pending_req_new_password)) {
748 wpabuf_free(data->pending_phase2_req);
749 data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
750 }
751
752 return 0;
753 }
754
755
756 static int eap_peap_decrypt(struct eap_sm *sm, struct eap_peap_data *data,
757 struct eap_method_ret *ret,
758 const struct eap_hdr *req,
759 const struct wpabuf *in_data,
760 struct wpabuf **out_data)
761 {
762 struct wpabuf *in_decrypted = NULL;
763 int res, skip_change = 0;
764 struct eap_hdr *hdr, *rhdr;
765 struct wpabuf *resp = NULL;
766 size_t len;
767
768 wpa_printf(MSG_DEBUG, "EAP-PEAP: received %lu bytes encrypted data for"
769 " Phase 2", (unsigned long) wpabuf_len(in_data));
770
771 if (data->pending_phase2_req) {
772 wpa_printf(MSG_DEBUG, "EAP-PEAP: Pending Phase 2 request - "
773 "skip decryption and use old data");
774 /* Clear TLS reassembly state. */
775 eap_peer_tls_reset_input(&data->ssl);
776 in_decrypted = data->pending_phase2_req;
777 data->pending_phase2_req = NULL;
778 skip_change = 1;
779 goto continue_req;
780 }
781
782 if (wpabuf_len(in_data) == 0 && sm->workaround &&
783 data->phase2_success) {
784 /*
785 * Cisco ACS seems to be using TLS ACK to terminate
786 * EAP-PEAPv0/GTC. Try to reply with TLS ACK.
787 */
788 wpa_printf(MSG_DEBUG, "EAP-PEAP: Received TLS ACK, but "
789 "expected data - acknowledge with TLS ACK since "
790 "Phase 2 has been completed");
791 ret->decision = DECISION_COND_SUCC;
792 ret->methodState = METHOD_DONE;
793 return 1;
794 } else if (wpabuf_len(in_data) == 0) {
795 /* Received TLS ACK - requesting more fragments */
796 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
797 data->peap_version,
798 req->identifier, NULL, out_data);
799 }
800
801 res = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
802 if (res)
803 return res;
804
805 continue_req:
806 wpa_hexdump_buf(MSG_DEBUG, "EAP-PEAP: Decrypted Phase 2 EAP",
807 in_decrypted);
808
809 hdr = wpabuf_mhead(in_decrypted);
810 if (wpabuf_len(in_decrypted) == 5 && hdr->code == EAP_CODE_REQUEST &&
811 be_to_host16(hdr->length) == 5 &&
812 eap_get_type(in_decrypted) == EAP_TYPE_IDENTITY) {
813 /* At least FreeRADIUS seems to send full EAP header with
814 * EAP Request Identity */
815 skip_change = 1;
816 }
817 if (wpabuf_len(in_decrypted) >= 5 && hdr->code == EAP_CODE_REQUEST &&
818 eap_get_type(in_decrypted) == EAP_TYPE_TLV) {
819 skip_change = 1;
820 }
821
822 if (data->peap_version == 0 && !skip_change) {
823 struct eap_hdr *nhdr;
824 struct wpabuf *nmsg = wpabuf_alloc(sizeof(struct eap_hdr) +
825 wpabuf_len(in_decrypted));
826 if (nmsg == NULL) {
827 wpabuf_free(in_decrypted);
828 return 0;
829 }
830 nhdr = wpabuf_put(nmsg, sizeof(*nhdr));
831 wpabuf_put_buf(nmsg, in_decrypted);
832 nhdr->code = req->code;
833 nhdr->identifier = req->identifier;
834 nhdr->length = host_to_be16(sizeof(struct eap_hdr) +
835 wpabuf_len(in_decrypted));
836
837 wpabuf_free(in_decrypted);
838 in_decrypted = nmsg;
839 }
840
841 if (data->peap_version >= 2) {
842 struct eap_tlv_hdr *tlv;
843 struct wpabuf *nmsg;
844
845 if (wpabuf_len(in_decrypted) < sizeof(*tlv) + sizeof(*hdr)) {
846 wpa_printf(MSG_INFO, "EAP-PEAPv2: Too short Phase 2 "
847 "EAP TLV");
848 wpabuf_free(in_decrypted);
849 return 0;
850 }
851 tlv = wpabuf_mhead(in_decrypted);
852 if ((be_to_host16(tlv->tlv_type) & 0x3fff) !=
853 EAP_TLV_EAP_PAYLOAD_TLV) {
854 wpa_printf(MSG_INFO, "EAP-PEAPv2: Not an EAP TLV");
855 wpabuf_free(in_decrypted);
856 return 0;
857 }
858 if (sizeof(*tlv) + be_to_host16(tlv->length) >
859 wpabuf_len(in_decrypted)) {
860 wpa_printf(MSG_INFO, "EAP-PEAPv2: Invalid EAP TLV "
861 "length");
862 wpabuf_free(in_decrypted);
863 return 0;
864 }
865 hdr = (struct eap_hdr *) (tlv + 1);
866 if (be_to_host16(hdr->length) > be_to_host16(tlv->length)) {
867 wpa_printf(MSG_INFO, "EAP-PEAPv2: No room for full "
868 "EAP packet in EAP TLV");
869 wpabuf_free(in_decrypted);
870 return 0;
871 }
872
873 nmsg = wpabuf_alloc(be_to_host16(hdr->length));
874 if (nmsg == NULL) {
875 wpabuf_free(in_decrypted);
876 return 0;
877 }
878
879 wpabuf_put_data(nmsg, hdr, be_to_host16(hdr->length));
880 wpabuf_free(in_decrypted);
881 in_decrypted = nmsg;
882 }
883
884 hdr = wpabuf_mhead(in_decrypted);
885 if (wpabuf_len(in_decrypted) < sizeof(*hdr)) {
886 wpa_printf(MSG_INFO, "EAP-PEAP: Too short Phase 2 "
887 "EAP frame (len=%lu)",
888 (unsigned long) wpabuf_len(in_decrypted));
889 wpabuf_free(in_decrypted);
890 return 0;
891 }
892 len = be_to_host16(hdr->length);
893 if (len > wpabuf_len(in_decrypted)) {
894 wpa_printf(MSG_INFO, "EAP-PEAP: Length mismatch in "
895 "Phase 2 EAP frame (len=%lu hdr->length=%lu)",
896 (unsigned long) wpabuf_len(in_decrypted),
897 (unsigned long) len);
898 wpabuf_free(in_decrypted);
899 return 0;
900 }
901 if (len < wpabuf_len(in_decrypted)) {
902 wpa_printf(MSG_INFO, "EAP-PEAP: Odd.. Phase 2 EAP header has "
903 "shorter length than full decrypted data "
904 "(%lu < %lu)",
905 (unsigned long) len,
906 (unsigned long) wpabuf_len(in_decrypted));
907 }
908 wpa_printf(MSG_DEBUG, "EAP-PEAP: received Phase 2: code=%d "
909 "identifier=%d length=%lu", hdr->code, hdr->identifier,
910 (unsigned long) len);
911 switch (hdr->code) {
912 case EAP_CODE_REQUEST:
913 if (eap_peap_phase2_request(sm, data, ret, in_decrypted,
914 &resp)) {
915 wpabuf_free(in_decrypted);
916 wpa_printf(MSG_INFO, "EAP-PEAP: Phase2 Request "
917 "processing failed");
918 return 0;
919 }
920 break;
921 case EAP_CODE_SUCCESS:
922 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Success");
923 if (data->peap_version == 1) {
924 /* EAP-Success within TLS tunnel is used to indicate
925 * shutdown of the TLS channel. The authentication has
926 * been completed. */
927 if (data->phase2_eap_started &&
928 !data->phase2_eap_success) {
929 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 "
930 "Success used to indicate success, "
931 "but Phase 2 EAP was not yet "
932 "completed successfully");
933 ret->methodState = METHOD_DONE;
934 ret->decision = DECISION_FAIL;
935 wpabuf_free(in_decrypted);
936 return 0;
937 }
938 wpa_printf(MSG_DEBUG, "EAP-PEAP: Version 1 - "
939 "EAP-Success within TLS tunnel - "
940 "authentication completed");
941 ret->decision = DECISION_UNCOND_SUCC;
942 ret->methodState = METHOD_DONE;
943 data->phase2_success = 1;
944 if (data->peap_outer_success == 2) {
945 wpabuf_free(in_decrypted);
946 wpa_printf(MSG_DEBUG, "EAP-PEAP: Use TLS ACK "
947 "to finish authentication");
948 return 1;
949 } else if (data->peap_outer_success == 1) {
950 /* Reply with EAP-Success within the TLS
951 * channel to complete the authentication. */
952 resp = wpabuf_alloc(sizeof(struct eap_hdr));
953 if (resp) {
954 rhdr = wpabuf_put(resp, sizeof(*rhdr));
955 rhdr->code = EAP_CODE_SUCCESS;
956 rhdr->identifier = hdr->identifier;
957 rhdr->length =
958 host_to_be16(sizeof(*rhdr));
959 }
960 } else {
961 /* No EAP-Success expected for Phase 1 (outer,
962 * unencrypted auth), so force EAP state
963 * machine to SUCCESS state. */
964 sm->peap_done = TRUE;
965 }
966 } else {
967 /* FIX: ? */
968 }
969 break;
970 case EAP_CODE_FAILURE:
971 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Failure");
972 ret->decision = DECISION_FAIL;
973 ret->methodState = METHOD_MAY_CONT;
974 ret->allowNotifications = FALSE;
975 /* Reply with EAP-Failure within the TLS channel to complete
976 * failure reporting. */
977 resp = wpabuf_alloc(sizeof(struct eap_hdr));
978 if (resp) {
979 rhdr = wpabuf_put(resp, sizeof(*rhdr));
980 rhdr->code = EAP_CODE_FAILURE;
981 rhdr->identifier = hdr->identifier;
982 rhdr->length = host_to_be16(sizeof(*rhdr));
983 }
984 break;
985 default:
986 wpa_printf(MSG_INFO, "EAP-PEAP: Unexpected code=%d in "
987 "Phase 2 EAP header", hdr->code);
988 break;
989 }
990
991 wpabuf_free(in_decrypted);
992
993 if (resp) {
994 int skip_change2 = 0;
995 struct wpabuf *rmsg, buf;
996
997 wpa_hexdump_buf_key(MSG_DEBUG,
998 "EAP-PEAP: Encrypting Phase 2 data", resp);
999 /* PEAP version changes */
1000 if (data->peap_version >= 2) {
1001 resp = eap_peapv2_tlv_eap_payload(resp);
1002 if (resp == NULL)
1003 return -1;
1004 }
1005 if (wpabuf_len(resp) >= 5 &&
1006 wpabuf_head_u8(resp)[0] == EAP_CODE_RESPONSE &&
1007 eap_get_type(resp) == EAP_TYPE_TLV)
1008 skip_change2 = 1;
1009 rmsg = resp;
1010 if (data->peap_version == 0 && !skip_change2) {
1011 wpabuf_set(&buf, wpabuf_head_u8(resp) +
1012 sizeof(struct eap_hdr),
1013 wpabuf_len(resp) - sizeof(struct eap_hdr));
1014 rmsg = &buf;
1015 }
1016
1017 if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
1018 data->peap_version, req->identifier,
1019 rmsg, out_data)) {
1020 wpa_printf(MSG_INFO, "EAP-PEAP: Failed to encrypt "
1021 "a Phase 2 frame");
1022 }
1023 wpabuf_free(resp);
1024 }
1025
1026 return 0;
1027 }
1028
1029
1030 static struct wpabuf * eap_peap_process(struct eap_sm *sm, void *priv,
1031 struct eap_method_ret *ret,
1032 const struct wpabuf *reqData)
1033 {
1034 const struct eap_hdr *req;
1035 size_t left;
1036 int res;
1037 u8 flags, id;
1038 struct wpabuf *resp;
1039 const u8 *pos;
1040 struct eap_peap_data *data = priv;
1041
1042 pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_PEAP, ret,
1043 reqData, &left, &flags);
1044 if (pos == NULL)
1045 return NULL;
1046 req = wpabuf_head(reqData);
1047 id = req->identifier;
1048
1049 if (flags & EAP_TLS_FLAGS_START) {
1050 wpa_printf(MSG_DEBUG, "EAP-PEAP: Start (server ver=%d, own "
1051 "ver=%d)", flags & EAP_TLS_VERSION_MASK,
1052 data->peap_version);
1053 if ((flags & EAP_TLS_VERSION_MASK) < data->peap_version)
1054 data->peap_version = flags & EAP_TLS_VERSION_MASK;
1055 if (data->force_peap_version >= 0 &&
1056 data->force_peap_version != data->peap_version) {
1057 wpa_printf(MSG_WARNING, "EAP-PEAP: Failed to select "
1058 "forced PEAP version %d",
1059 data->force_peap_version);
1060 ret->methodState = METHOD_DONE;
1061 ret->decision = DECISION_FAIL;
1062 ret->allowNotifications = FALSE;
1063 return NULL;
1064 }
1065 wpa_printf(MSG_DEBUG, "EAP-PEAP: Using PEAP version %d",
1066 data->peap_version);
1067 left = 0; /* make sure that this frame is empty, even though it
1068 * should always be, anyway */
1069 }
1070
1071 resp = NULL;
1072 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1073 !data->resuming) {
1074 struct wpabuf msg;
1075 wpabuf_set(&msg, pos, left);
1076 res = eap_peap_decrypt(sm, data, ret, req, &msg, &resp);
1077 } else {
1078 res = eap_peer_tls_process_helper(sm, &data->ssl,
1079 EAP_TYPE_PEAP,
1080 data->peap_version, id, pos,
1081 left, &resp);
1082
1083 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1084 char *label;
1085 wpa_printf(MSG_DEBUG,
1086 "EAP-PEAP: TLS done, proceed to Phase 2");
1087 os_free(data->key_data);
1088 /* draft-josefsson-ppext-eap-tls-eap-05.txt
1089 * specifies that PEAPv1 would use "client PEAP
1090 * encryption" as the label. However, most existing
1091 * PEAPv1 implementations seem to be using the old
1092 * label, "client EAP encryption", instead. Use the old
1093 * label by default, but allow it to be configured with
1094 * phase1 parameter peaplabel=1. */
1095 if (data->peap_version > 1 || data->force_new_label)
1096 label = "client PEAP encryption";
1097 else
1098 label = "client EAP encryption";
1099 wpa_printf(MSG_DEBUG, "EAP-PEAP: using label '%s' in "
1100 "key derivation", label);
1101 data->key_data =
1102 eap_peer_tls_derive_key(sm, &data->ssl, label,
1103 EAP_TLS_KEY_LEN);
1104 if (data->key_data) {
1105 wpa_hexdump_key(MSG_DEBUG,
1106 "EAP-PEAP: Derived key",
1107 data->key_data,
1108 EAP_TLS_KEY_LEN);
1109 } else {
1110 wpa_printf(MSG_DEBUG, "EAP-PEAP: Failed to "
1111 "derive key");
1112 }
1113
1114 if (sm->workaround && data->resuming) {
1115 /*
1116 * At least few RADIUS servers (Aegis v1.1.6;
1117 * but not v1.1.4; and Cisco ACS) seem to be
1118 * terminating PEAPv1 (Aegis) or PEAPv0 (Cisco
1119 * ACS) session resumption with outer
1120 * EAP-Success. This does not seem to follow
1121 * draft-josefsson-pppext-eap-tls-eap-05.txt
1122 * section 4.2, so only allow this if EAP
1123 * workarounds are enabled.
1124 */
1125 wpa_printf(MSG_DEBUG, "EAP-PEAP: Workaround - "
1126 "allow outer EAP-Success to "
1127 "terminate PEAP resumption");
1128 ret->decision = DECISION_COND_SUCC;
1129 data->phase2_success = 1;
1130 }
1131
1132 data->resuming = 0;
1133 }
1134
1135 if (res == 2) {
1136 struct wpabuf msg;
1137 /*
1138 * Application data included in the handshake message.
1139 */
1140 wpabuf_free(data->pending_phase2_req);
1141 data->pending_phase2_req = resp;
1142 resp = NULL;
1143 wpabuf_set(&msg, pos, left);
1144 res = eap_peap_decrypt(sm, data, ret, req, &msg,
1145 &resp);
1146 }
1147 }
1148
1149 if (ret->methodState == METHOD_DONE) {
1150 ret->allowNotifications = FALSE;
1151 }
1152
1153 if (res == 1) {
1154 wpabuf_free(resp);
1155 return eap_peer_tls_build_ack(id, EAP_TYPE_PEAP,
1156 data->peap_version);
1157 }
1158
1159 return resp;
1160 }
1161
1162
1163 static Boolean eap_peap_has_reauth_data(struct eap_sm *sm, void *priv)
1164 {
1165 struct eap_peap_data *data = priv;
1166 return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1167 data->phase2_success;
1168 }
1169
1170
1171 static void eap_peap_deinit_for_reauth(struct eap_sm *sm, void *priv)
1172 {
1173 struct eap_peap_data *data = priv;
1174 wpabuf_free(data->pending_phase2_req);
1175 data->pending_phase2_req = NULL;
1176 data->crypto_binding_used = 0;
1177 }
1178
1179
1180 static void * eap_peap_init_for_reauth(struct eap_sm *sm, void *priv)
1181 {
1182 struct eap_peap_data *data = priv;
1183 os_free(data->key_data);
1184 data->key_data = NULL;
1185 if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1186 os_free(data);
1187 return NULL;
1188 }
1189 if (data->phase2_priv && data->phase2_method &&
1190 data->phase2_method->init_for_reauth)
1191 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1192 data->phase2_success = 0;
1193 data->phase2_eap_success = 0;
1194 data->phase2_eap_started = 0;
1195 data->resuming = 1;
1196 data->reauth = 1;
1197 sm->peap_done = FALSE;
1198 return priv;
1199 }
1200
1201
1202 static int eap_peap_get_status(struct eap_sm *sm, void *priv, char *buf,
1203 size_t buflen, int verbose)
1204 {
1205 struct eap_peap_data *data = priv;
1206 int len, ret;
1207
1208 len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1209 if (data->phase2_method) {
1210 ret = os_snprintf(buf + len, buflen - len,
1211 "EAP-PEAPv%d Phase2 method=%s\n",
1212 data->peap_version,
1213 data->phase2_method->name);
1214 if (ret < 0 || (size_t) ret >= buflen - len)
1215 return len;
1216 len += ret;
1217 }
1218 return len;
1219 }
1220
1221
1222 static Boolean eap_peap_isKeyAvailable(struct eap_sm *sm, void *priv)
1223 {
1224 struct eap_peap_data *data = priv;
1225 return data->key_data != NULL && data->phase2_success;
1226 }
1227
1228
1229 static u8 * eap_peap_getKey(struct eap_sm *sm, void *priv, size_t *len)
1230 {
1231 struct eap_peap_data *data = priv;
1232 u8 *key;
1233
1234 if (data->key_data == NULL || !data->phase2_success)
1235 return NULL;
1236
1237 key = os_malloc(EAP_TLS_KEY_LEN);
1238 if (key == NULL)
1239 return NULL;
1240
1241 *len = EAP_TLS_KEY_LEN;
1242
1243 if (data->crypto_binding_used) {
1244 u8 csk[128];
1245 /*
1246 * Note: It looks like Microsoft implementation requires null
1247 * termination for this label while the one used for deriving
1248 * IPMK|CMK did not use null termination.
1249 */
1250 peap_prfplus(data->peap_version, data->ipmk, 40,
1251 "Session Key Generating Function",
1252 (u8 *) "\00", 1, csk, sizeof(csk));
1253 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CSK", csk, sizeof(csk));
1254 os_memcpy(key, csk, EAP_TLS_KEY_LEN);
1255 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Derived key",
1256 key, EAP_TLS_KEY_LEN);
1257 } else
1258 os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
1259
1260 return key;
1261 }
1262
1263
1264 int eap_peer_peap_register(void)
1265 {
1266 struct eap_method *eap;
1267 int ret;
1268
1269 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1270 EAP_VENDOR_IETF, EAP_TYPE_PEAP, "PEAP");
1271 if (eap == NULL)
1272 return -1;
1273
1274 eap->init = eap_peap_init;
1275 eap->deinit = eap_peap_deinit;
1276 eap->process = eap_peap_process;
1277 eap->isKeyAvailable = eap_peap_isKeyAvailable;
1278 eap->getKey = eap_peap_getKey;
1279 eap->get_status = eap_peap_get_status;
1280 eap->has_reauth_data = eap_peap_has_reauth_data;
1281 eap->deinit_for_reauth = eap_peap_deinit_for_reauth;
1282 eap->init_for_reauth = eap_peap_init_for_reauth;
1283
1284 ret = eap_peer_method_register(eap);
1285 if (ret)
1286 eap_peer_method_free(eap);
1287 return ret;
1288 }
Mirror of AROS' svn.