crypto_openssl.c revision 61d9df3e62aaa0e87ad05452fcb95142159a17b6 
1/*
2 * WPA Supplicant / wrapper functions for libcrypto
3 * Copyright (c) 2004-2012, 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#include <openssl/opensslv.h>
11#include <openssl/err.h>
12#include <openssl/des.h>
13#include <openssl/aes.h>
14#include <openssl/bn.h>
15#include <openssl/evp.h>
16#include <openssl/dh.h>
17#include <openssl/hmac.h>
18#include <openssl/rand.h>
19#ifdef CONFIG_OPENSSL_CMAC
20#include <openssl/cmac.h>
21#endif /* CONFIG_OPENSSL_CMAC */
22
23#include "common.h"
24#include "wpabuf.h"
25#include "dh_group5.h"
26#include "crypto.h"
27
28#if OPENSSL_VERSION_NUMBER < 0x00907000
29#define DES_key_schedule des_key_schedule
30#define DES_cblock des_cblock
31#define DES_set_key(key, schedule) des_set_key((key), *(schedule))
32#define DES_ecb_encrypt(input, output, ks, enc) \
33	des_ecb_encrypt((input), (output), *(ks), (enc))
34#endif /* openssl < 0.9.7 */
35
36static BIGNUM * get_group5_prime(void)
37{
38#if OPENSSL_VERSION_NUMBER < 0x00908000
39	static const unsigned char RFC3526_PRIME_1536[] = {
40		0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC9,0x0F,0xDA,0xA2,
41		0x21,0x68,0xC2,0x34,0xC4,0xC6,0x62,0x8B,0x80,0xDC,0x1C,0xD1,
42		0x29,0x02,0x4E,0x08,0x8A,0x67,0xCC,0x74,0x02,0x0B,0xBE,0xA6,
43		0x3B,0x13,0x9B,0x22,0x51,0x4A,0x08,0x79,0x8E,0x34,0x04,0xDD,
44		0xEF,0x95,0x19,0xB3,0xCD,0x3A,0x43,0x1B,0x30,0x2B,0x0A,0x6D,
45		0xF2,0x5F,0x14,0x37,0x4F,0xE1,0x35,0x6D,0x6D,0x51,0xC2,0x45,
46		0xE4,0x85,0xB5,0x76,0x62,0x5E,0x7E,0xC6,0xF4,0x4C,0x42,0xE9,
47		0xA6,0x37,0xED,0x6B,0x0B,0xFF,0x5C,0xB6,0xF4,0x06,0xB7,0xED,
48		0xEE,0x38,0x6B,0xFB,0x5A,0x89,0x9F,0xA5,0xAE,0x9F,0x24,0x11,
49		0x7C,0x4B,0x1F,0xE6,0x49,0x28,0x66,0x51,0xEC,0xE4,0x5B,0x3D,
50		0xC2,0x00,0x7C,0xB8,0xA1,0x63,0xBF,0x05,0x98,0xDA,0x48,0x36,
51		0x1C,0x55,0xD3,0x9A,0x69,0x16,0x3F,0xA8,0xFD,0x24,0xCF,0x5F,
52		0x83,0x65,0x5D,0x23,0xDC,0xA3,0xAD,0x96,0x1C,0x62,0xF3,0x56,
53		0x20,0x85,0x52,0xBB,0x9E,0xD5,0x29,0x07,0x70,0x96,0x96,0x6D,
54		0x67,0x0C,0x35,0x4E,0x4A,0xBC,0x98,0x04,0xF1,0x74,0x6C,0x08,
55		0xCA,0x23,0x73,0x27,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
56	};
57        return BN_bin2bn(RFC3526_PRIME_1536, sizeof(RFC3526_PRIME_1536), NULL);
58#else /* openssl < 0.9.8 */
59	return get_rfc3526_prime_1536(NULL);
60#endif /* openssl < 0.9.8 */
61}
62
63#if OPENSSL_VERSION_NUMBER < 0x00908000
64#ifndef OPENSSL_NO_SHA256
65#ifndef OPENSSL_FIPS
66#define NO_SHA256_WRAPPER
67#endif
68#endif
69
70#endif /* openssl < 0.9.8 */
71
72#ifdef OPENSSL_NO_SHA256
73#define NO_SHA256_WRAPPER
74#endif
75
76static int openssl_digest_vector(const EVP_MD *type, size_t num_elem,
77				 const u8 *addr[], const size_t *len, u8 *mac)
78{
79	EVP_MD_CTX ctx;
80	size_t i;
81	unsigned int mac_len;
82
83	EVP_MD_CTX_init(&ctx);
84	if (!EVP_DigestInit_ex(&ctx, type, NULL)) {
85		wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestInit_ex failed: %s",
86			   ERR_error_string(ERR_get_error(), NULL));
87		return -1;
88	}
89	for (i = 0; i < num_elem; i++) {
90		if (!EVP_DigestUpdate(&ctx, addr[i], len[i])) {
91			wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestUpdate "
92				   "failed: %s",
93				   ERR_error_string(ERR_get_error(), NULL));
94			return -1;
95		}
96	}
97	if (!EVP_DigestFinal(&ctx, mac, &mac_len)) {
98		wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestFinal failed: %s",
99			   ERR_error_string(ERR_get_error(), NULL));
100		return -1;
101	}
102
103	return 0;
104}
105
106
107int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
108{
109	return openssl_digest_vector(EVP_md4(), num_elem, addr, len, mac);
110}
111
112
113void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
114{
115	u8 pkey[8], next, tmp;
116	int i;
117	DES_key_schedule ks;
118
119	/* Add parity bits to the key */
120	next = 0;
121	for (i = 0; i < 7; i++) {
122		tmp = key[i];
123		pkey[i] = (tmp >> i) | next | 1;
124		next = tmp << (7 - i);
125	}
126	pkey[i] = next | 1;
127
128	DES_set_key(&pkey, &ks);
129	DES_ecb_encrypt((DES_cblock *) clear, (DES_cblock *) cypher, &ks,
130			DES_ENCRYPT);
131}
132
133
134int rc4_skip(const u8 *key, size_t keylen, size_t skip,
135	     u8 *data, size_t data_len)
136{
137#ifdef OPENSSL_NO_RC4
138	return -1;
139#else /* OPENSSL_NO_RC4 */
140	EVP_CIPHER_CTX ctx;
141	int outl;
142	int res = -1;
143	unsigned char skip_buf[16];
144
145	EVP_CIPHER_CTX_init(&ctx);
146	if (!EVP_CIPHER_CTX_set_padding(&ctx, 0) ||
147	    !EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, NULL, NULL, 1) ||
148	    !EVP_CIPHER_CTX_set_key_length(&ctx, keylen) ||
149	    !EVP_CipherInit_ex(&ctx, NULL, NULL, key, NULL, 1))
150		goto out;
151
152	while (skip >= sizeof(skip_buf)) {
153		size_t len = skip;
154		if (len > sizeof(skip_buf))
155			len = sizeof(skip_buf);
156		if (!EVP_CipherUpdate(&ctx, skip_buf, &outl, skip_buf, len))
157			goto out;
158		skip -= len;
159	}
160
161	if (EVP_CipherUpdate(&ctx, data, &outl, data, data_len))
162		res = 0;
163
164out:
165	EVP_CIPHER_CTX_cleanup(&ctx);
166	return res;
167#endif /* OPENSSL_NO_RC4 */
168}
169
170
171int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
172{
173	return openssl_digest_vector(EVP_md5(), num_elem, addr, len, mac);
174}
175
176
177int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
178{
179	return openssl_digest_vector(EVP_sha1(), num_elem, addr, len, mac);
180}
181
182
183#ifndef NO_SHA256_WRAPPER
184int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len,
185		  u8 *mac)
186{
187	return openssl_digest_vector(EVP_sha256(), num_elem, addr, len, mac);
188}
189#endif /* NO_SHA256_WRAPPER */
190
191
192static const EVP_CIPHER * aes_get_evp_cipher(size_t keylen)
193{
194	switch (keylen) {
195	case 16:
196		return EVP_aes_128_ecb();
197	case 24:
198		return EVP_aes_192_ecb();
199	case 32:
200		return EVP_aes_256_ecb();
201	}
202
203	return NULL;
204}
205
206
207void * aes_encrypt_init(const u8 *key, size_t len)
208{
209	EVP_CIPHER_CTX *ctx;
210	const EVP_CIPHER *type;
211
212	type = aes_get_evp_cipher(len);
213	if (type == NULL)
214		return NULL;
215
216	ctx = os_malloc(sizeof(*ctx));
217	if (ctx == NULL)
218		return NULL;
219	EVP_CIPHER_CTX_init(ctx);
220	if (EVP_EncryptInit_ex(ctx, type, NULL, key, NULL) != 1) {
221		os_free(ctx);
222		return NULL;
223	}
224	EVP_CIPHER_CTX_set_padding(ctx, 0);
225	return ctx;
226}
227
228
229void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
230{
231	EVP_CIPHER_CTX *c = ctx;
232	int clen = 16;
233	if (EVP_EncryptUpdate(c, crypt, &clen, plain, 16) != 1) {
234		wpa_printf(MSG_ERROR, "OpenSSL: EVP_EncryptUpdate failed: %s",
235			   ERR_error_string(ERR_get_error(), NULL));
236	}
237}
238
239
240void aes_encrypt_deinit(void *ctx)
241{
242	EVP_CIPHER_CTX *c = ctx;
243	u8 buf[16];
244	int len = sizeof(buf);
245	if (EVP_EncryptFinal_ex(c, buf, &len) != 1) {
246		wpa_printf(MSG_ERROR, "OpenSSL: EVP_EncryptFinal_ex failed: "
247			   "%s", ERR_error_string(ERR_get_error(), NULL));
248	}
249	if (len != 0) {
250		wpa_printf(MSG_ERROR, "OpenSSL: Unexpected padding length %d "
251			   "in AES encrypt", len);
252	}
253	EVP_CIPHER_CTX_cleanup(c);
254	os_free(c);
255}
256
257
258void * aes_decrypt_init(const u8 *key, size_t len)
259{
260	EVP_CIPHER_CTX *ctx;
261	const EVP_CIPHER *type;
262
263	type = aes_get_evp_cipher(len);
264	if (type == NULL)
265		return NULL;
266
267	ctx = os_malloc(sizeof(*ctx));
268	if (ctx == NULL)
269		return NULL;
270	EVP_CIPHER_CTX_init(ctx);
271	if (EVP_DecryptInit_ex(ctx, type, NULL, key, NULL) != 1) {
272		os_free(ctx);
273		return NULL;
274	}
275	EVP_CIPHER_CTX_set_padding(ctx, 0);
276	return ctx;
277}
278
279
280void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
281{
282	EVP_CIPHER_CTX *c = ctx;
283	int plen = 16;
284	if (EVP_DecryptUpdate(c, plain, &plen, crypt, 16) != 1) {
285		wpa_printf(MSG_ERROR, "OpenSSL: EVP_DecryptUpdate failed: %s",
286			   ERR_error_string(ERR_get_error(), NULL));
287	}
288}
289
290
291void aes_decrypt_deinit(void *ctx)
292{
293	EVP_CIPHER_CTX *c = ctx;
294	u8 buf[16];
295	int len = sizeof(buf);
296	if (EVP_DecryptFinal_ex(c, buf, &len) != 1) {
297		wpa_printf(MSG_ERROR, "OpenSSL: EVP_DecryptFinal_ex failed: "
298			   "%s", ERR_error_string(ERR_get_error(), NULL));
299	}
300	if (len != 0) {
301		wpa_printf(MSG_ERROR, "OpenSSL: Unexpected padding length %d "
302			   "in AES decrypt", len);
303	}
304	EVP_CIPHER_CTX_cleanup(c);
305	os_free(ctx);
306}
307
308
309int crypto_mod_exp(const u8 *base, size_t base_len,
310		   const u8 *power, size_t power_len,
311		   const u8 *modulus, size_t modulus_len,
312		   u8 *result, size_t *result_len)
313{
314	BIGNUM *bn_base, *bn_exp, *bn_modulus, *bn_result;
315	int ret = -1;
316	BN_CTX *ctx;
317
318	ctx = BN_CTX_new();
319	if (ctx == NULL)
320		return -1;
321
322	bn_base = BN_bin2bn(base, base_len, NULL);
323	bn_exp = BN_bin2bn(power, power_len, NULL);
324	bn_modulus = BN_bin2bn(modulus, modulus_len, NULL);
325	bn_result = BN_new();
326
327	if (bn_base == NULL || bn_exp == NULL || bn_modulus == NULL ||
328	    bn_result == NULL)
329		goto error;
330
331	if (BN_mod_exp(bn_result, bn_base, bn_exp, bn_modulus, ctx) != 1)
332		goto error;
333
334	*result_len = BN_bn2bin(bn_result, result);
335	ret = 0;
336
337error:
338	BN_free(bn_base);
339	BN_free(bn_exp);
340	BN_free(bn_modulus);
341	BN_free(bn_result);
342	BN_CTX_free(ctx);
343	return ret;
344}
345
346
347struct crypto_cipher {
348	EVP_CIPHER_CTX enc;
349	EVP_CIPHER_CTX dec;
350};
351
352
353struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
354					  const u8 *iv, const u8 *key,
355					  size_t key_len)
356{
357	struct crypto_cipher *ctx;
358	const EVP_CIPHER *cipher;
359
360	ctx = os_zalloc(sizeof(*ctx));
361	if (ctx == NULL)
362		return NULL;
363
364	switch (alg) {
365#ifndef OPENSSL_NO_RC4
366	case CRYPTO_CIPHER_ALG_RC4:
367		cipher = EVP_rc4();
368		break;
369#endif /* OPENSSL_NO_RC4 */
370#ifndef OPENSSL_NO_AES
371	case CRYPTO_CIPHER_ALG_AES:
372		switch (key_len) {
373		case 16:
374			cipher = EVP_aes_128_cbc();
375			break;
376		case 24:
377			cipher = EVP_aes_192_cbc();
378			break;
379		case 32:
380			cipher = EVP_aes_256_cbc();
381			break;
382		default:
383			os_free(ctx);
384			return NULL;
385		}
386		break;
387#endif /* OPENSSL_NO_AES */
388#ifndef OPENSSL_NO_DES
389	case CRYPTO_CIPHER_ALG_3DES:
390		cipher = EVP_des_ede3_cbc();
391		break;
392	case CRYPTO_CIPHER_ALG_DES:
393		cipher = EVP_des_cbc();
394		break;
395#endif /* OPENSSL_NO_DES */
396#ifndef OPENSSL_NO_RC2
397	case CRYPTO_CIPHER_ALG_RC2:
398		cipher = EVP_rc2_ecb();
399		break;
400#endif /* OPENSSL_NO_RC2 */
401	default:
402		os_free(ctx);
403		return NULL;
404	}
405
406	EVP_CIPHER_CTX_init(&ctx->enc);
407	EVP_CIPHER_CTX_set_padding(&ctx->enc, 0);
408	if (!EVP_EncryptInit_ex(&ctx->enc, cipher, NULL, NULL, NULL) ||
409	    !EVP_CIPHER_CTX_set_key_length(&ctx->enc, key_len) ||
410	    !EVP_EncryptInit_ex(&ctx->enc, NULL, NULL, key, iv)) {
411		EVP_CIPHER_CTX_cleanup(&ctx->enc);
412		os_free(ctx);
413		return NULL;
414	}
415
416	EVP_CIPHER_CTX_init(&ctx->dec);
417	EVP_CIPHER_CTX_set_padding(&ctx->dec, 0);
418	if (!EVP_DecryptInit_ex(&ctx->dec, cipher, NULL, NULL, NULL) ||
419	    !EVP_CIPHER_CTX_set_key_length(&ctx->dec, key_len) ||
420	    !EVP_DecryptInit_ex(&ctx->dec, NULL, NULL, key, iv)) {
421		EVP_CIPHER_CTX_cleanup(&ctx->enc);
422		EVP_CIPHER_CTX_cleanup(&ctx->dec);
423		os_free(ctx);
424		return NULL;
425	}
426
427	return ctx;
428}
429
430
431int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain,
432			  u8 *crypt, size_t len)
433{
434	int outl;
435	if (!EVP_EncryptUpdate(&ctx->enc, crypt, &outl, plain, len))
436		return -1;
437	return 0;
438}
439
440
441int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt,
442			  u8 *plain, size_t len)
443{
444	int outl;
445	outl = len;
446	if (!EVP_DecryptUpdate(&ctx->dec, plain, &outl, crypt, len))
447		return -1;
448	return 0;
449}
450
451
452void crypto_cipher_deinit(struct crypto_cipher *ctx)
453{
454	EVP_CIPHER_CTX_cleanup(&ctx->enc);
455	EVP_CIPHER_CTX_cleanup(&ctx->dec);
456	os_free(ctx);
457}
458
459
460void * dh5_init(struct wpabuf **priv, struct wpabuf **publ)
461{
462	DH *dh;
463	struct wpabuf *pubkey = NULL, *privkey = NULL;
464	size_t publen, privlen;
465
466	*priv = NULL;
467	*publ = NULL;
468
469	dh = DH_new();
470	if (dh == NULL)
471		return NULL;
472
473	dh->g = BN_new();
474	if (dh->g == NULL || BN_set_word(dh->g, 2) != 1)
475		goto err;
476
477	dh->p = get_group5_prime();
478	if (dh->p == NULL)
479		goto err;
480
481	if (DH_generate_key(dh) != 1)
482		goto err;
483
484	publen = BN_num_bytes(dh->pub_key);
485	pubkey = wpabuf_alloc(publen);
486	if (pubkey == NULL)
487		goto err;
488	privlen = BN_num_bytes(dh->priv_key);
489	privkey = wpabuf_alloc(privlen);
490	if (privkey == NULL)
491		goto err;
492
493	BN_bn2bin(dh->pub_key, wpabuf_put(pubkey, publen));
494	BN_bn2bin(dh->priv_key, wpabuf_put(privkey, privlen));
495
496	*priv = privkey;
497	*publ = pubkey;
498	return dh;
499
500err:
501	wpabuf_free(pubkey);
502	wpabuf_free(privkey);
503	DH_free(dh);
504	return NULL;
505}
506
507
508void * dh5_init_fixed(const struct wpabuf *priv, const struct wpabuf *publ)
509{
510	DH *dh;
511
512	dh = DH_new();
513	if (dh == NULL)
514		return NULL;
515
516	dh->g = BN_new();
517	if (dh->g == NULL || BN_set_word(dh->g, 2) != 1)
518		goto err;
519
520	dh->p = get_group5_prime();
521	if (dh->p == NULL)
522		goto err;
523
524	dh->priv_key = BN_bin2bn(wpabuf_head(priv), wpabuf_len(priv), NULL);
525	if (dh->priv_key == NULL)
526		goto err;
527
528	dh->pub_key = BN_bin2bn(wpabuf_head(publ), wpabuf_len(publ), NULL);
529	if (dh->pub_key == NULL)
530		goto err;
531
532	if (DH_generate_key(dh) != 1)
533		goto err;
534
535	return dh;
536
537err:
538	DH_free(dh);
539	return NULL;
540}
541
542
543struct wpabuf * dh5_derive_shared(void *ctx, const struct wpabuf *peer_public,
544				  const struct wpabuf *own_private)
545{
546	BIGNUM *pub_key;
547	struct wpabuf *res = NULL;
548	size_t rlen;
549	DH *dh = ctx;
550	int keylen;
551
552	if (ctx == NULL)
553		return NULL;
554
555	pub_key = BN_bin2bn(wpabuf_head(peer_public), wpabuf_len(peer_public),
556			    NULL);
557	if (pub_key == NULL)
558		return NULL;
559
560	rlen = DH_size(dh);
561	res = wpabuf_alloc(rlen);
562	if (res == NULL)
563		goto err;
564
565	keylen = DH_compute_key(wpabuf_mhead(res), pub_key, dh);
566	if (keylen < 0)
567		goto err;
568	wpabuf_put(res, keylen);
569	BN_free(pub_key);
570
571	return res;
572
573err:
574	BN_free(pub_key);
575	wpabuf_free(res);
576	return NULL;
577}
578
579
580void dh5_free(void *ctx)
581{
582	DH *dh;
583	if (ctx == NULL)
584		return;
585	dh = ctx;
586	DH_free(dh);
587}
588
589
590struct crypto_hash {
591	HMAC_CTX ctx;
592};
593
594
595struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key,
596				      size_t key_len)
597{
598	struct crypto_hash *ctx;
599	const EVP_MD *md;
600
601	switch (alg) {
602#ifndef OPENSSL_NO_MD5
603	case CRYPTO_HASH_ALG_HMAC_MD5:
604		md = EVP_md5();
605		break;
606#endif /* OPENSSL_NO_MD5 */
607#ifndef OPENSSL_NO_SHA
608	case CRYPTO_HASH_ALG_HMAC_SHA1:
609		md = EVP_sha1();
610		break;
611#endif /* OPENSSL_NO_SHA */
612#ifndef OPENSSL_NO_SHA256
613#ifdef CONFIG_SHA256
614	case CRYPTO_HASH_ALG_HMAC_SHA256:
615		md = EVP_sha256();
616		break;
617#endif /* CONFIG_SHA256 */
618#endif /* OPENSSL_NO_SHA256 */
619	default:
620		return NULL;
621	}
622
623	ctx = os_zalloc(sizeof(*ctx));
624	if (ctx == NULL)
625		return NULL;
626	HMAC_CTX_init(&ctx->ctx);
627
628#if OPENSSL_VERSION_NUMBER < 0x00909000
629	HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL);
630#else /* openssl < 0.9.9 */
631	if (HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL) != 1) {
632		os_free(ctx);
633		return NULL;
634	}
635#endif /* openssl < 0.9.9 */
636
637	return ctx;
638}
639
640
641void crypto_hash_update(struct crypto_hash *ctx, const u8 *data, size_t len)
642{
643	if (ctx == NULL)
644		return;
645	HMAC_Update(&ctx->ctx, data, len);
646}
647
648
649int crypto_hash_finish(struct crypto_hash *ctx, u8 *mac, size_t *len)
650{
651	unsigned int mdlen;
652	int res;
653
654	if (ctx == NULL)
655		return -2;
656
657	if (mac == NULL || len == NULL) {
658		os_free(ctx);
659		return 0;
660	}
661
662	mdlen = *len;
663#if OPENSSL_VERSION_NUMBER < 0x00909000
664	HMAC_Final(&ctx->ctx, mac, &mdlen);
665	res = 1;
666#else /* openssl < 0.9.9 */
667	res = HMAC_Final(&ctx->ctx, mac, &mdlen);
668#endif /* openssl < 0.9.9 */
669	HMAC_CTX_cleanup(&ctx->ctx);
670	os_free(ctx);
671
672	if (res == 1) {
673		*len = mdlen;
674		return 0;
675	}
676
677	return -1;
678}
679
680
681int pbkdf2_sha1(const char *passphrase, const u8 *ssid, size_t ssid_len,
682		int iterations, u8 *buf, size_t buflen)
683{
684#if OPENSSL_VERSION_NUMBER < 0x00908000
685	if (PKCS5_PBKDF2_HMAC_SHA1(passphrase, os_strlen(passphrase),
686				   (unsigned char *) ssid,
687				   ssid_len, 4096, buflen, buf) != 1)
688		return -1;
689#else /* openssl < 0.9.8 */
690	if (PKCS5_PBKDF2_HMAC_SHA1(passphrase, os_strlen(passphrase), ssid,
691				   ssid_len, 4096, buflen, buf) != 1)
692		return -1;
693#endif /* openssl < 0.9.8 */
694	return 0;
695}
696
697
698int hmac_sha1_vector(const u8 *key, size_t key_len, size_t num_elem,
699		     const u8 *addr[], const size_t *len, u8 *mac)
700{
701	HMAC_CTX ctx;
702	size_t i;
703	unsigned int mdlen;
704	int res;
705
706	HMAC_CTX_init(&ctx);
707#if OPENSSL_VERSION_NUMBER < 0x00909000
708	HMAC_Init_ex(&ctx, key, key_len, EVP_sha1(), NULL);
709#else /* openssl < 0.9.9 */
710	if (HMAC_Init_ex(&ctx, key, key_len, EVP_sha1(), NULL) != 1)
711		return -1;
712#endif /* openssl < 0.9.9 */
713
714	for (i = 0; i < num_elem; i++)
715		HMAC_Update(&ctx, addr[i], len[i]);
716
717	mdlen = 20;
718#if OPENSSL_VERSION_NUMBER < 0x00909000
719	HMAC_Final(&ctx, mac, &mdlen);
720	res = 1;
721#else /* openssl < 0.9.9 */
722	res = HMAC_Final(&ctx, mac, &mdlen);
723#endif /* openssl < 0.9.9 */
724	HMAC_CTX_cleanup(&ctx);
725
726	return res == 1 ? 0 : -1;
727}
728
729
730int hmac_sha1(const u8 *key, size_t key_len, const u8 *data, size_t data_len,
731	       u8 *mac)
732{
733	return hmac_sha1_vector(key, key_len, 1, &data, &data_len, mac);
734}
735
736
737#ifdef CONFIG_SHA256
738
739int hmac_sha256_vector(const u8 *key, size_t key_len, size_t num_elem,
740		       const u8 *addr[], const size_t *len, u8 *mac)
741{
742	HMAC_CTX ctx;
743	size_t i;
744	unsigned int mdlen;
745	int res;
746
747	HMAC_CTX_init(&ctx);
748#if OPENSSL_VERSION_NUMBER < 0x00909000
749	HMAC_Init_ex(&ctx, key, key_len, EVP_sha256(), NULL);
750#else /* openssl < 0.9.9 */
751	if (HMAC_Init_ex(&ctx, key, key_len, EVP_sha256(), NULL) != 1)
752		return -1;
753#endif /* openssl < 0.9.9 */
754
755	for (i = 0; i < num_elem; i++)
756		HMAC_Update(&ctx, addr[i], len[i]);
757
758	mdlen = 32;
759#if OPENSSL_VERSION_NUMBER < 0x00909000
760	HMAC_Final(&ctx, mac, &mdlen);
761	res = 1;
762#else /* openssl < 0.9.9 */
763	res = HMAC_Final(&ctx, mac, &mdlen);
764#endif /* openssl < 0.9.9 */
765	HMAC_CTX_cleanup(&ctx);
766
767	return res == 1 ? 0 : -1;
768}
769
770
771int hmac_sha256(const u8 *key, size_t key_len, const u8 *data,
772		size_t data_len, u8 *mac)
773{
774	return hmac_sha256_vector(key, key_len, 1, &data, &data_len, mac);
775}
776
777#endif /* CONFIG_SHA256 */
778
779
780int crypto_get_random(void *buf, size_t len)
781{
782	if (RAND_bytes(buf, len) != 1)
783		return -1;
784	return 0;
785}
786
787
788#ifdef CONFIG_OPENSSL_CMAC
789int omac1_aes_128_vector(const u8 *key, size_t num_elem,
790			 const u8 *addr[], const size_t *len, u8 *mac)
791{
792	CMAC_CTX *ctx;
793	int ret = -1;
794	size_t outlen, i;
795
796	ctx = CMAC_CTX_new();
797	if (ctx == NULL)
798		return -1;
799
800	if (!CMAC_Init(ctx, key, 16, EVP_aes_128_cbc(), NULL))
801		goto fail;
802	for (i = 0; i < num_elem; i++) {
803		if (!CMAC_Update(ctx, addr[i], len[i]))
804			goto fail;
805	}
806	if (!CMAC_Final(ctx, mac, &outlen) || outlen != 16)
807		goto fail;
808
809	ret = 0;
810fail:
811	CMAC_CTX_free(ctx);
812	return ret;
813}
814
815
816int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac)
817{
818	return omac1_aes_128_vector(key, 1, &data, &data_len, mac);
819}
820#endif /* CONFIG_OPENSSL_CMAC */
821