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