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