Line data Source code
1 : /*
2 : * EAP server/peer: EAP-GPSK shared routines
3 : * Copyright (c) 2006-2007, 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/aes_wrap.h"
13 : #include "crypto/sha256.h"
14 : #include "eap_defs.h"
15 : #include "eap_gpsk_common.h"
16 :
17 :
18 : /**
19 : * eap_gpsk_supported_ciphersuite - Check whether ciphersuite is supported
20 : * @vendor: CSuite/Vendor
21 : * @specifier: CSuite/Specifier
22 : * Returns: 1 if ciphersuite is support, or 0 if not
23 : */
24 65 : int eap_gpsk_supported_ciphersuite(int vendor, int specifier)
25 : {
26 65 : if (vendor == EAP_GPSK_VENDOR_IETF &&
27 : specifier == EAP_GPSK_CIPHER_AES)
28 42 : return 1;
29 : #ifdef EAP_GPSK_SHA256
30 23 : if (vendor == EAP_GPSK_VENDOR_IETF &&
31 : specifier == EAP_GPSK_CIPHER_SHA256)
32 23 : return 1;
33 : #endif /* EAP_GPSK_SHA256 */
34 0 : return 0;
35 : }
36 :
37 :
38 95 : static int eap_gpsk_gkdf_cmac(const u8 *psk /* Y */,
39 : const u8 *data /* Z */, size_t data_len,
40 : u8 *buf, size_t len /* X */)
41 : {
42 : u8 *opos;
43 : size_t i, n, hashlen, left, clen;
44 : u8 ibuf[2], hash[16];
45 : const u8 *addr[2];
46 : size_t vlen[2];
47 :
48 95 : hashlen = sizeof(hash);
49 : /* M_i = MAC_Y (i || Z); (MAC = AES-CMAC-128) */
50 95 : addr[0] = ibuf;
51 95 : vlen[0] = sizeof(ibuf);
52 95 : addr[1] = data;
53 95 : vlen[1] = data_len;
54 :
55 95 : opos = buf;
56 95 : left = len;
57 95 : n = (len + hashlen - 1) / hashlen;
58 532 : for (i = 1; i <= n; i++) {
59 437 : WPA_PUT_BE16(ibuf, i);
60 437 : if (omac1_aes_128_vector(psk, 2, addr, vlen, hash))
61 0 : return -1;
62 437 : clen = left > hashlen ? hashlen : left;
63 437 : os_memcpy(opos, hash, clen);
64 437 : opos += clen;
65 437 : left -= clen;
66 : }
67 :
68 95 : return 0;
69 : }
70 :
71 :
72 : #ifdef EAP_GPSK_SHA256
73 5 : static int eap_gpsk_gkdf_sha256(const u8 *psk /* Y */,
74 : const u8 *data /* Z */, size_t data_len,
75 : u8 *buf, size_t len /* X */)
76 : {
77 : u8 *opos;
78 : size_t i, n, hashlen, left, clen;
79 : u8 ibuf[2], hash[SHA256_MAC_LEN];
80 : const u8 *addr[2];
81 : size_t vlen[2];
82 :
83 5 : hashlen = SHA256_MAC_LEN;
84 : /* M_i = MAC_Y (i || Z); (MAC = HMAC-SHA256) */
85 5 : addr[0] = ibuf;
86 5 : vlen[0] = sizeof(ibuf);
87 5 : addr[1] = data;
88 5 : vlen[1] = data_len;
89 :
90 5 : opos = buf;
91 5 : left = len;
92 5 : n = (len + hashlen - 1) / hashlen;
93 20 : for (i = 1; i <= n; i++) {
94 15 : WPA_PUT_BE16(ibuf, i);
95 15 : hmac_sha256_vector(psk, 32, 2, addr, vlen, hash);
96 15 : clen = left > hashlen ? hashlen : left;
97 15 : os_memcpy(opos, hash, clen);
98 15 : opos += clen;
99 15 : left -= clen;
100 : }
101 :
102 5 : return 0;
103 : }
104 : #endif /* EAP_GPSK_SHA256 */
105 :
106 :
107 40 : static int eap_gpsk_derive_keys_helper(u32 csuite_specifier,
108 : u8 *kdf_out, size_t kdf_out_len,
109 : const u8 *psk, size_t psk_len,
110 : const u8 *seed, size_t seed_len,
111 : u8 *msk, u8 *emsk,
112 : u8 *sk, size_t sk_len,
113 : u8 *pk, size_t pk_len)
114 : {
115 : u8 mk[32], *pos, *data;
116 : size_t data_len, mk_len;
117 : int (*gkdf)(const u8 *_psk, const u8 *_data, size_t _data_len,
118 : u8 *buf, size_t len);
119 :
120 40 : gkdf = NULL;
121 40 : switch (csuite_specifier) {
122 : case EAP_GPSK_CIPHER_AES:
123 38 : gkdf = eap_gpsk_gkdf_cmac;
124 38 : mk_len = 16;
125 38 : break;
126 : #ifdef EAP_GPSK_SHA256
127 : case EAP_GPSK_CIPHER_SHA256:
128 2 : gkdf = eap_gpsk_gkdf_sha256;
129 2 : mk_len = SHA256_MAC_LEN;
130 2 : break;
131 : #endif /* EAP_GPSK_SHA256 */
132 : default:
133 0 : return -1;
134 : }
135 :
136 40 : if (psk_len < mk_len)
137 0 : return -1;
138 :
139 40 : data_len = 2 + psk_len + 6 + seed_len;
140 40 : data = os_malloc(data_len);
141 40 : if (data == NULL)
142 0 : return -1;
143 40 : pos = data;
144 40 : WPA_PUT_BE16(pos, psk_len);
145 40 : pos += 2;
146 40 : os_memcpy(pos, psk, psk_len);
147 40 : pos += psk_len;
148 40 : WPA_PUT_BE32(pos, EAP_GPSK_VENDOR_IETF); /* CSuite/Vendor = IETF */
149 40 : pos += 4;
150 40 : WPA_PUT_BE16(pos, csuite_specifier); /* CSuite/Specifier */
151 40 : pos += 2;
152 40 : os_memcpy(pos, seed, seed_len); /* inputString */
153 40 : wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: Data to MK derivation",
154 : data, data_len);
155 :
156 40 : if (gkdf(psk, data, data_len, mk, mk_len) < 0) {
157 0 : os_free(data);
158 0 : return -1;
159 : }
160 40 : os_free(data);
161 40 : wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: MK", mk, mk_len);
162 :
163 40 : if (gkdf(mk, seed, seed_len, kdf_out, kdf_out_len) < 0)
164 0 : return -1;
165 :
166 40 : pos = kdf_out;
167 40 : wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: MSK", pos, EAP_MSK_LEN);
168 40 : os_memcpy(msk, pos, EAP_MSK_LEN);
169 40 : pos += EAP_MSK_LEN;
170 :
171 40 : wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: EMSK", pos, EAP_EMSK_LEN);
172 40 : os_memcpy(emsk, pos, EAP_EMSK_LEN);
173 40 : pos += EAP_EMSK_LEN;
174 :
175 40 : wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: SK", pos, sk_len);
176 40 : os_memcpy(sk, pos, sk_len);
177 40 : pos += sk_len;
178 :
179 40 : if (pk) {
180 38 : wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: PK", pos, pk_len);
181 38 : os_memcpy(pk, pos, pk_len);
182 : }
183 :
184 40 : return 0;
185 : }
186 :
187 :
188 38 : static int eap_gpsk_derive_keys_aes(const u8 *psk, size_t psk_len,
189 : const u8 *seed, size_t seed_len,
190 : u8 *msk, u8 *emsk, u8 *sk, size_t *sk_len,
191 : u8 *pk, size_t *pk_len)
192 : {
193 : #define EAP_GPSK_SK_LEN_AES 16
194 : #define EAP_GPSK_PK_LEN_AES 16
195 : u8 kdf_out[EAP_MSK_LEN + EAP_EMSK_LEN + EAP_GPSK_SK_LEN_AES +
196 : EAP_GPSK_PK_LEN_AES];
197 :
198 : /*
199 : * inputString = RAND_Peer || ID_Peer || RAND_Server || ID_Server
200 : * (= seed)
201 : * KS = 16, PL = psk_len, CSuite_Sel = 0x00000000 0x0001
202 : * MK = GKDF-16 (PSK[0..15], PL || PSK || CSuite_Sel || inputString)
203 : * MSK = GKDF-160 (MK, inputString)[0..63]
204 : * EMSK = GKDF-160 (MK, inputString)[64..127]
205 : * SK = GKDF-160 (MK, inputString)[128..143]
206 : * PK = GKDF-160 (MK, inputString)[144..159]
207 : * zero = 0x00 || 0x00 || ... || 0x00 (16 times)
208 : * Method-ID = GKDF-16 (zero, "Method ID" || EAP_Method_Type ||
209 : * CSuite_Sel || inputString)
210 : */
211 :
212 38 : *sk_len = EAP_GPSK_SK_LEN_AES;
213 38 : *pk_len = EAP_GPSK_PK_LEN_AES;
214 :
215 38 : return eap_gpsk_derive_keys_helper(EAP_GPSK_CIPHER_AES,
216 : kdf_out, sizeof(kdf_out),
217 : psk, psk_len, seed, seed_len,
218 : msk, emsk, sk, *sk_len,
219 : pk, *pk_len);
220 : }
221 :
222 :
223 : #ifdef EAP_GPSK_SHA256
224 2 : static int eap_gpsk_derive_keys_sha256(const u8 *psk, size_t psk_len,
225 : const u8 *seed, size_t seed_len,
226 : u8 *msk, u8 *emsk,
227 : u8 *sk, size_t *sk_len)
228 : {
229 : #define EAP_GPSK_SK_LEN_SHA256 SHA256_MAC_LEN
230 : #define EAP_GPSK_PK_LEN_SHA256 SHA256_MAC_LEN
231 : u8 kdf_out[EAP_MSK_LEN + EAP_EMSK_LEN + EAP_GPSK_SK_LEN_SHA256 +
232 : EAP_GPSK_PK_LEN_SHA256];
233 :
234 : /*
235 : * inputString = RAND_Peer || ID_Peer || RAND_Server || ID_Server
236 : * (= seed)
237 : * KS = 32, PL = psk_len, CSuite_Sel = 0x00000000 0x0002
238 : * MK = GKDF-32 (PSK[0..31], PL || PSK || CSuite_Sel || inputString)
239 : * MSK = GKDF-160 (MK, inputString)[0..63]
240 : * EMSK = GKDF-160 (MK, inputString)[64..127]
241 : * SK = GKDF-160 (MK, inputString)[128..159]
242 : * zero = 0x00 || 0x00 || ... || 0x00 (32 times)
243 : * Method-ID = GKDF-16 (zero, "Method ID" || EAP_Method_Type ||
244 : * CSuite_Sel || inputString)
245 : */
246 :
247 2 : *sk_len = EAP_GPSK_SK_LEN_SHA256;
248 :
249 2 : return eap_gpsk_derive_keys_helper(EAP_GPSK_CIPHER_SHA256,
250 : kdf_out, sizeof(kdf_out),
251 : psk, psk_len, seed, seed_len,
252 : msk, emsk, sk, *sk_len,
253 : NULL, 0);
254 : }
255 : #endif /* EAP_GPSK_SHA256 */
256 :
257 :
258 : /**
259 : * eap_gpsk_derive_keys - Derive EAP-GPSK keys
260 : * @psk: Pre-shared key
261 : * @psk_len: Length of psk in bytes
262 : * @vendor: CSuite/Vendor
263 : * @specifier: CSuite/Specifier
264 : * @rand_peer: 32-byte RAND_Peer
265 : * @rand_server: 32-byte RAND_Server
266 : * @id_peer: ID_Peer
267 : * @id_peer_len: Length of ID_Peer
268 : * @id_server: ID_Server
269 : * @id_server_len: Length of ID_Server
270 : * @msk: Buffer for 64-byte MSK
271 : * @emsk: Buffer for 64-byte EMSK
272 : * @sk: Buffer for SK (at least EAP_GPSK_MAX_SK_LEN bytes)
273 : * @sk_len: Buffer for returning length of SK
274 : * @pk: Buffer for PK (at least EAP_GPSK_MAX_PK_LEN bytes)
275 : * @pk_len: Buffer for returning length of PK
276 : * Returns: 0 on success, -1 on failure
277 : */
278 40 : int eap_gpsk_derive_keys(const u8 *psk, size_t psk_len, int vendor,
279 : int specifier,
280 : const u8 *rand_peer, const u8 *rand_server,
281 : const u8 *id_peer, size_t id_peer_len,
282 : const u8 *id_server, size_t id_server_len,
283 : u8 *msk, u8 *emsk, u8 *sk, size_t *sk_len,
284 : u8 *pk, size_t *pk_len)
285 : {
286 : u8 *seed, *pos;
287 : size_t seed_len;
288 : int ret;
289 :
290 40 : wpa_printf(MSG_DEBUG, "EAP-GPSK: Deriving keys (%d:%d)",
291 : vendor, specifier);
292 :
293 40 : if (vendor != EAP_GPSK_VENDOR_IETF)
294 0 : return -1;
295 :
296 40 : wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: PSK", psk, psk_len);
297 :
298 : /* Seed = RAND_Peer || ID_Peer || RAND_Server || ID_Server */
299 40 : seed_len = 2 * EAP_GPSK_RAND_LEN + id_server_len + id_peer_len;
300 40 : seed = os_malloc(seed_len);
301 40 : if (seed == NULL) {
302 0 : wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to allocate memory "
303 : "for key derivation");
304 0 : return -1;
305 : }
306 :
307 40 : pos = seed;
308 40 : os_memcpy(pos, rand_peer, EAP_GPSK_RAND_LEN);
309 40 : pos += EAP_GPSK_RAND_LEN;
310 40 : os_memcpy(pos, id_peer, id_peer_len);
311 40 : pos += id_peer_len;
312 40 : os_memcpy(pos, rand_server, EAP_GPSK_RAND_LEN);
313 40 : pos += EAP_GPSK_RAND_LEN;
314 40 : os_memcpy(pos, id_server, id_server_len);
315 40 : pos += id_server_len;
316 40 : wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Seed", seed, seed_len);
317 :
318 40 : switch (specifier) {
319 : case EAP_GPSK_CIPHER_AES:
320 38 : ret = eap_gpsk_derive_keys_aes(psk, psk_len, seed, seed_len,
321 : msk, emsk, sk, sk_len,
322 : pk, pk_len);
323 38 : break;
324 : #ifdef EAP_GPSK_SHA256
325 : case EAP_GPSK_CIPHER_SHA256:
326 2 : ret = eap_gpsk_derive_keys_sha256(psk, psk_len, seed, seed_len,
327 : msk, emsk, sk, sk_len);
328 2 : break;
329 : #endif /* EAP_GPSK_SHA256 */
330 : default:
331 0 : wpa_printf(MSG_DEBUG, "EAP-GPSK: Unknown cipher %d:%d used in "
332 : "key derivation", vendor, specifier);
333 0 : ret = -1;
334 0 : break;
335 : }
336 :
337 40 : os_free(seed);
338 :
339 40 : return ret;
340 : }
341 :
342 :
343 20 : static int eap_gpsk_derive_mid_helper(u32 csuite_specifier,
344 : u8 *kdf_out, size_t kdf_out_len,
345 : const u8 *psk, const u8 *seed,
346 : size_t seed_len, u8 method_type)
347 : {
348 : u8 *pos, *data;
349 : size_t data_len;
350 : int (*gkdf)(const u8 *_psk, const u8 *_data, size_t _data_len,
351 : u8 *buf, size_t len);
352 :
353 20 : gkdf = NULL;
354 20 : switch (csuite_specifier) {
355 : case EAP_GPSK_CIPHER_AES:
356 19 : gkdf = eap_gpsk_gkdf_cmac;
357 19 : break;
358 : #ifdef EAP_GPSK_SHA256
359 : case EAP_GPSK_CIPHER_SHA256:
360 1 : gkdf = eap_gpsk_gkdf_sha256;
361 1 : break;
362 : #endif /* EAP_GPSK_SHA256 */
363 : default:
364 0 : wpa_printf(MSG_DEBUG, "EAP-GPSK: Unknown cipher %d used in "
365 : "Session-Id derivation", csuite_specifier);
366 0 : return -1;
367 : }
368 :
369 : #define SID_LABEL "Method ID"
370 : /* "Method ID" || EAP_Method_Type || CSuite_Sel || inputString */
371 20 : data_len = strlen(SID_LABEL) + 1 + 6 + seed_len;
372 20 : data = os_malloc(data_len);
373 20 : if (data == NULL)
374 0 : return -1;
375 20 : pos = data;
376 20 : os_memcpy(pos, SID_LABEL, strlen(SID_LABEL));
377 20 : pos += strlen(SID_LABEL);
378 : #undef SID_LABEL
379 20 : os_memcpy(pos, &method_type, 1);
380 20 : pos += 1;
381 20 : WPA_PUT_BE32(pos, EAP_GPSK_VENDOR_IETF); /* CSuite/Vendor = IETF */
382 20 : pos += 4;
383 20 : WPA_PUT_BE16(pos, csuite_specifier); /* CSuite/Specifier */
384 20 : pos += 2;
385 20 : os_memcpy(pos, seed, seed_len); /* inputString */
386 20 : wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Data to Method ID derivation",
387 : data, data_len);
388 :
389 20 : if (gkdf(psk, data, data_len, kdf_out, kdf_out_len) < 0) {
390 0 : os_free(data);
391 0 : return -1;
392 : }
393 20 : os_free(data);
394 20 : wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Method ID", kdf_out, kdf_out_len);
395 :
396 20 : return 0;
397 : }
398 :
399 :
400 : /**
401 : * eap_gpsk_session_id - Derive EAP-GPSK Session ID
402 : * @psk: Pre-shared key
403 : * @psk_len: Length of psk in bytes
404 : * @vendor: CSuite/Vendor
405 : * @specifier: CSuite/Specifier
406 : * @rand_peer: 32-byte RAND_Peer
407 : * @rand_server: 32-byte RAND_Server
408 : * @id_peer: ID_Peer
409 : * @id_peer_len: Length of ID_Peer
410 : * @id_server: ID_Server
411 : * @id_server_len: Length of ID_Server
412 : * @method_type: EAP Authentication Method Type
413 : * @sid: Buffer for 17-byte Session ID
414 : * @sid_len: Buffer for returning length of Session ID
415 : * Returns: 0 on success, -1 on failure
416 : */
417 20 : int eap_gpsk_derive_session_id(const u8 *psk, size_t psk_len, int vendor,
418 : int specifier,
419 : const u8 *rand_peer, const u8 *rand_server,
420 : const u8 *id_peer, size_t id_peer_len,
421 : const u8 *id_server, size_t id_server_len,
422 : u8 method_type, u8 *sid, size_t *sid_len)
423 : {
424 : u8 *seed, *pos;
425 : u8 kdf_out[16];
426 : size_t seed_len;
427 : int ret;
428 :
429 20 : wpa_printf(MSG_DEBUG, "EAP-GPSK: Deriving Session ID(%d:%d)",
430 : vendor, specifier);
431 :
432 20 : if (vendor != EAP_GPSK_VENDOR_IETF)
433 0 : return -1;
434 :
435 20 : wpa_hexdump_key(MSG_DEBUG, "EAP-GPSK: PSK", psk, psk_len);
436 :
437 : /*
438 : * inputString = RAND_Peer || ID_Peer || RAND_Server || ID_Server
439 : * (= seed)
440 : * KS = 16, CSuite_Sel = 0x00000000 0x0001
441 : * Method-ID = GKDF-16 (zero, "Method ID" || EAP_Method_Type ||
442 : * CSuite_Sel || inputString)
443 : */
444 20 : seed_len = 2 * EAP_GPSK_RAND_LEN + id_server_len + id_peer_len;
445 20 : seed = os_malloc(seed_len);
446 20 : if (seed == NULL) {
447 0 : wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to allocate memory "
448 : "for Session-Id derivation");
449 0 : return -1;
450 : }
451 :
452 20 : pos = seed;
453 20 : os_memcpy(pos, rand_peer, EAP_GPSK_RAND_LEN);
454 20 : pos += EAP_GPSK_RAND_LEN;
455 20 : os_memcpy(pos, id_peer, id_peer_len);
456 20 : pos += id_peer_len;
457 20 : os_memcpy(pos, rand_server, EAP_GPSK_RAND_LEN);
458 20 : pos += EAP_GPSK_RAND_LEN;
459 20 : os_memcpy(pos, id_server, id_server_len);
460 20 : pos += id_server_len;
461 20 : wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Seed", seed, seed_len);
462 :
463 20 : ret = eap_gpsk_derive_mid_helper(specifier,
464 : kdf_out, sizeof(kdf_out),
465 : psk, seed, seed_len,
466 : method_type);
467 :
468 20 : sid[0] = method_type;
469 20 : os_memcpy(sid + 1, kdf_out, sizeof(kdf_out));
470 20 : *sid_len = 1 + sizeof(kdf_out);
471 :
472 20 : os_free(seed);
473 :
474 20 : return ret;
475 : }
476 :
477 :
478 : /**
479 : * eap_gpsk_mic_len - Get the length of the MIC
480 : * @vendor: CSuite/Vendor
481 : * @specifier: CSuite/Specifier
482 : * Returns: MIC length in bytes
483 : */
484 116 : size_t eap_gpsk_mic_len(int vendor, int specifier)
485 : {
486 116 : if (vendor != EAP_GPSK_VENDOR_IETF)
487 0 : return 0;
488 :
489 116 : switch (specifier) {
490 : case EAP_GPSK_CIPHER_AES:
491 110 : return 16;
492 : #ifdef EAP_GPSK_SHA256
493 : case EAP_GPSK_CIPHER_SHA256:
494 6 : return 32;
495 : #endif /* EAP_GPSK_SHA256 */
496 : default:
497 0 : return 0;
498 : }
499 : }
500 :
501 :
502 110 : static int eap_gpsk_compute_mic_aes(const u8 *sk, size_t sk_len,
503 : const u8 *data, size_t len, u8 *mic)
504 : {
505 110 : if (sk_len != 16) {
506 0 : wpa_printf(MSG_DEBUG, "EAP-GPSK: Invalid SK length %lu for "
507 : "AES-CMAC MIC", (unsigned long) sk_len);
508 0 : return -1;
509 : }
510 :
511 110 : return omac1_aes_128(sk, data, len, mic);
512 : }
513 :
514 :
515 : /**
516 : * eap_gpsk_compute_mic - Compute EAP-GPSK MIC for an EAP packet
517 : * @sk: Session key SK from eap_gpsk_derive_keys()
518 : * @sk_len: SK length in bytes from eap_gpsk_derive_keys()
519 : * @vendor: CSuite/Vendor
520 : * @specifier: CSuite/Specifier
521 : * @data: Input data to MIC
522 : * @len: Input data length in bytes
523 : * @mic: Buffer for the computed MIC, eap_gpsk_mic_len(cipher) bytes
524 : * Returns: 0 on success, -1 on failure
525 : */
526 116 : int eap_gpsk_compute_mic(const u8 *sk, size_t sk_len, int vendor,
527 : int specifier, const u8 *data, size_t len, u8 *mic)
528 : {
529 : int ret;
530 :
531 116 : if (vendor != EAP_GPSK_VENDOR_IETF)
532 0 : return -1;
533 :
534 116 : switch (specifier) {
535 : case EAP_GPSK_CIPHER_AES:
536 110 : ret = eap_gpsk_compute_mic_aes(sk, sk_len, data, len, mic);
537 110 : break;
538 : #ifdef EAP_GPSK_SHA256
539 : case EAP_GPSK_CIPHER_SHA256:
540 6 : hmac_sha256(sk, sk_len, data, len, mic);
541 6 : ret = 0;
542 6 : break;
543 : #endif /* EAP_GPSK_SHA256 */
544 : default:
545 0 : wpa_printf(MSG_DEBUG, "EAP-GPSK: Unknown cipher %d:%d used in "
546 : "MIC computation", vendor, specifier);
547 0 : ret = -1;
548 0 : break;
549 : }
550 :
551 116 : return ret;
552 : }
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