1 /* ====================================================================
2 * Copyright (c) 2011-2013 The OpenSSL Project. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
20 *
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * licensing@OpenSSL.org.
25 *
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
29 *
30 * 6. Redistributions of any form whatsoever must retain the following
31 * acknowledgment:
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
34 *
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
48 */
49
50 #include <openssl/opensslconf.h>
51
52 #include <stdio.h>
53 #include <string.h>
54
55 #if !defined(OPENSSL_NO_AES) && !defined(OPENSSL_NO_SHA1)
56
57 # include <openssl/evp.h>
58 # include <openssl/objects.h>
59 # include <openssl/aes.h>
60 # include <openssl/sha.h>
61 # include "evp_locl.h"
62
63 # ifndef EVP_CIPH_FLAG_AEAD_CIPHER
64 # define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
65 # define EVP_CTRL_AEAD_TLS1_AAD 0x16
66 # define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
67 # endif
68
69 # if !defined(EVP_CIPH_FLAG_DEFAULT_ASN1)
70 # define EVP_CIPH_FLAG_DEFAULT_ASN1 0
71 # endif
72
73 # define TLS1_1_VERSION 0x0302
74
75 typedef struct {
76 AES_KEY ks;
77 SHA_CTX head, tail, md;
78 size_t payload_length; /* AAD length in decrypt case */
79 union {
80 unsigned int tls_ver;
81 unsigned char tls_aad[16]; /* 13 used */
82 } aux;
83 } EVP_AES_HMAC_SHA1;
84
85 # define NO_PAYLOAD_LENGTH ((size_t)-1)
86
87 # if defined(AES_ASM) && ( \
88 defined(__x86_64) || defined(__x86_64__) || \
89 defined(_M_AMD64) || defined(_M_X64) || \
90 defined(__INTEL__) )
91
92 # if defined(__GNUC__) && __GNUC__>=2 && !defined(PEDANTIC)
93 # define BSWAP(x) ({ unsigned int r=(x); asm ("bswapl %0":"=r"(r):"0"(r)); r; })
94 # endif
95
96 extern unsigned int OPENSSL_ia32cap_P[2];
97 # define AESNI_CAPABLE (1<<(57-32))
98
99 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
100 AES_KEY *key);
101 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
102 AES_KEY *key);
103
104 void aesni_cbc_encrypt(const unsigned char *in,
105 unsigned char *out,
106 size_t length,
107 const AES_KEY *key, unsigned char *ivec, int enc);
108
109 void aesni_cbc_sha1_enc(const void *inp, void *out, size_t blocks,
110 const AES_KEY *key, unsigned char iv[16],
111 SHA_CTX *ctx, const void *in0);
112
113 # define data(ctx) ((EVP_AES_HMAC_SHA1 *)(ctx)->cipher_data)
114
aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * inkey,const unsigned char * iv,int enc)115 static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
116 const unsigned char *inkey,
117 const unsigned char *iv, int enc)
118 {
119 EVP_AES_HMAC_SHA1 *key = data(ctx);
120 int ret;
121
122 if (enc)
123 ret = aesni_set_encrypt_key(inkey, ctx->key_len * 8, &key->ks);
124 else
125 ret = aesni_set_decrypt_key(inkey, ctx->key_len * 8, &key->ks);
126
127 SHA1_Init(&key->head); /* handy when benchmarking */
128 key->tail = key->head;
129 key->md = key->head;
130
131 key->payload_length = NO_PAYLOAD_LENGTH;
132
133 return ret < 0 ? 0 : 1;
134 }
135
136 # define STITCHED_CALL
137
138 # if !defined(STITCHED_CALL)
139 # define aes_off 0
140 # endif
141
142 void sha1_block_data_order(void *c, const void *p, size_t len);
143
sha1_update(SHA_CTX * c,const void * data,size_t len)144 static void sha1_update(SHA_CTX *c, const void *data, size_t len)
145 {
146 const unsigned char *ptr = data;
147 size_t res;
148
149 if ((res = c->num)) {
150 res = SHA_CBLOCK - res;
151 if (len < res)
152 res = len;
153 SHA1_Update(c, ptr, res);
154 ptr += res;
155 len -= res;
156 }
157
158 res = len % SHA_CBLOCK;
159 len -= res;
160
161 if (len) {
162 sha1_block_data_order(c, ptr, len / SHA_CBLOCK);
163
164 ptr += len;
165 c->Nh += len >> 29;
166 c->Nl += len <<= 3;
167 if (c->Nl < (unsigned int)len)
168 c->Nh++;
169 }
170
171 if (res)
172 SHA1_Update(c, ptr, res);
173 }
174
175 # ifdef SHA1_Update
176 # undef SHA1_Update
177 # endif
178 # define SHA1_Update sha1_update
179
aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)180 static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
181 const unsigned char *in, size_t len)
182 {
183 EVP_AES_HMAC_SHA1 *key = data(ctx);
184 unsigned int l;
185 size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
186 * later */
187 sha_off = 0;
188 # if defined(STITCHED_CALL)
189 size_t aes_off = 0, blocks;
190
191 sha_off = SHA_CBLOCK - key->md.num;
192 # endif
193
194 key->payload_length = NO_PAYLOAD_LENGTH;
195
196 if (len % AES_BLOCK_SIZE)
197 return 0;
198
199 if (ctx->encrypt) {
200 if (plen == NO_PAYLOAD_LENGTH)
201 plen = len;
202 else if (len !=
203 ((plen + SHA_DIGEST_LENGTH +
204 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
205 return 0;
206 else if (key->aux.tls_ver >= TLS1_1_VERSION)
207 iv = AES_BLOCK_SIZE;
208
209 # if defined(STITCHED_CALL)
210 if (plen > (sha_off + iv)
211 && (blocks = (plen - (sha_off + iv)) / SHA_CBLOCK)) {
212 SHA1_Update(&key->md, in + iv, sha_off);
213
214 aesni_cbc_sha1_enc(in, out, blocks, &key->ks,
215 ctx->iv, &key->md, in + iv + sha_off);
216 blocks *= SHA_CBLOCK;
217 aes_off += blocks;
218 sha_off += blocks;
219 key->md.Nh += blocks >> 29;
220 key->md.Nl += blocks <<= 3;
221 if (key->md.Nl < (unsigned int)blocks)
222 key->md.Nh++;
223 } else {
224 sha_off = 0;
225 }
226 # endif
227 sha_off += iv;
228 SHA1_Update(&key->md, in + sha_off, plen - sha_off);
229
230 if (plen != len) { /* "TLS" mode of operation */
231 if (in != out)
232 memcpy(out + aes_off, in + aes_off, plen - aes_off);
233
234 /* calculate HMAC and append it to payload */
235 SHA1_Final(out + plen, &key->md);
236 key->md = key->tail;
237 SHA1_Update(&key->md, out + plen, SHA_DIGEST_LENGTH);
238 SHA1_Final(out + plen, &key->md);
239
240 /* pad the payload|hmac */
241 plen += SHA_DIGEST_LENGTH;
242 for (l = len - plen - 1; plen < len; plen++)
243 out[plen] = l;
244 /* encrypt HMAC|padding at once */
245 aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
246 &key->ks, ctx->iv, 1);
247 } else {
248 aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
249 &key->ks, ctx->iv, 1);
250 }
251 } else {
252 union {
253 unsigned int u[SHA_DIGEST_LENGTH / sizeof(unsigned int)];
254 unsigned char c[32 + SHA_DIGEST_LENGTH];
255 } mac, *pmac;
256
257 /* arrange cache line alignment */
258 pmac = (void *)(((size_t)mac.c + 31) & ((size_t)0 - 32));
259
260 /* decrypt HMAC|padding at once */
261 aesni_cbc_encrypt(in, out, len, &key->ks, ctx->iv, 0);
262
263 if (plen) { /* "TLS" mode of operation */
264 size_t inp_len, mask, j, i;
265 unsigned int res, maxpad, pad, bitlen;
266 int ret = 1;
267 union {
268 unsigned int u[SHA_LBLOCK];
269 unsigned char c[SHA_CBLOCK];
270 } *data = (void *)key->md.data;
271
272 if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
273 >= TLS1_1_VERSION)
274 iv = AES_BLOCK_SIZE;
275
276 if (len < (iv + SHA_DIGEST_LENGTH + 1))
277 return 0;
278
279 /* omit explicit iv */
280 out += iv;
281 len -= iv;
282
283 /* figure out payload length */
284 pad = out[len - 1];
285 maxpad = len - (SHA_DIGEST_LENGTH + 1);
286 maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
287 maxpad &= 255;
288
289 inp_len = len - (SHA_DIGEST_LENGTH + pad + 1);
290 mask = (0 - ((inp_len - len) >> (sizeof(inp_len) * 8 - 1)));
291 inp_len &= mask;
292 ret &= (int)mask;
293
294 key->aux.tls_aad[plen - 2] = inp_len >> 8;
295 key->aux.tls_aad[plen - 1] = inp_len;
296
297 /* calculate HMAC */
298 key->md = key->head;
299 SHA1_Update(&key->md, key->aux.tls_aad, plen);
300
301 # if 1
302 len -= SHA_DIGEST_LENGTH; /* amend mac */
303 if (len >= (256 + SHA_CBLOCK)) {
304 j = (len - (256 + SHA_CBLOCK)) & (0 - SHA_CBLOCK);
305 j += SHA_CBLOCK - key->md.num;
306 SHA1_Update(&key->md, out, j);
307 out += j;
308 len -= j;
309 inp_len -= j;
310 }
311
312 /* but pretend as if we hashed padded payload */
313 bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
314 # ifdef BSWAP
315 bitlen = BSWAP(bitlen);
316 # else
317 mac.c[0] = 0;
318 mac.c[1] = (unsigned char)(bitlen >> 16);
319 mac.c[2] = (unsigned char)(bitlen >> 8);
320 mac.c[3] = (unsigned char)bitlen;
321 bitlen = mac.u[0];
322 # endif
323
324 pmac->u[0] = 0;
325 pmac->u[1] = 0;
326 pmac->u[2] = 0;
327 pmac->u[3] = 0;
328 pmac->u[4] = 0;
329
330 for (res = key->md.num, j = 0; j < len; j++) {
331 size_t c = out[j];
332 mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
333 c &= mask;
334 c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
335 data->c[res++] = (unsigned char)c;
336
337 if (res != SHA_CBLOCK)
338 continue;
339
340 /* j is not incremented yet */
341 mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
342 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
343 sha1_block_data_order(&key->md, data, 1);
344 mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
345 pmac->u[0] |= key->md.h0 & mask;
346 pmac->u[1] |= key->md.h1 & mask;
347 pmac->u[2] |= key->md.h2 & mask;
348 pmac->u[3] |= key->md.h3 & mask;
349 pmac->u[4] |= key->md.h4 & mask;
350 res = 0;
351 }
352
353 for (i = res; i < SHA_CBLOCK; i++, j++)
354 data->c[i] = 0;
355
356 if (res > SHA_CBLOCK - 8) {
357 mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
358 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
359 sha1_block_data_order(&key->md, data, 1);
360 mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
361 pmac->u[0] |= key->md.h0 & mask;
362 pmac->u[1] |= key->md.h1 & mask;
363 pmac->u[2] |= key->md.h2 & mask;
364 pmac->u[3] |= key->md.h3 & mask;
365 pmac->u[4] |= key->md.h4 & mask;
366
367 memset(data, 0, SHA_CBLOCK);
368 j += 64;
369 }
370 data->u[SHA_LBLOCK - 1] = bitlen;
371 sha1_block_data_order(&key->md, data, 1);
372 mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
373 pmac->u[0] |= key->md.h0 & mask;
374 pmac->u[1] |= key->md.h1 & mask;
375 pmac->u[2] |= key->md.h2 & mask;
376 pmac->u[3] |= key->md.h3 & mask;
377 pmac->u[4] |= key->md.h4 & mask;
378
379 # ifdef BSWAP
380 pmac->u[0] = BSWAP(pmac->u[0]);
381 pmac->u[1] = BSWAP(pmac->u[1]);
382 pmac->u[2] = BSWAP(pmac->u[2]);
383 pmac->u[3] = BSWAP(pmac->u[3]);
384 pmac->u[4] = BSWAP(pmac->u[4]);
385 # else
386 for (i = 0; i < 5; i++) {
387 res = pmac->u[i];
388 pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
389 pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
390 pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
391 pmac->c[4 * i + 3] = (unsigned char)res;
392 }
393 # endif
394 len += SHA_DIGEST_LENGTH;
395 # else
396 SHA1_Update(&key->md, out, inp_len);
397 res = key->md.num;
398 SHA1_Final(pmac->c, &key->md);
399
400 {
401 unsigned int inp_blocks, pad_blocks;
402
403 /* but pretend as if we hashed padded payload */
404 inp_blocks =
405 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
406 res += (unsigned int)(len - inp_len);
407 pad_blocks = res / SHA_CBLOCK;
408 res %= SHA_CBLOCK;
409 pad_blocks +=
410 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
411 for (; inp_blocks < pad_blocks; inp_blocks++)
412 sha1_block_data_order(&key->md, data, 1);
413 }
414 # endif
415 key->md = key->tail;
416 SHA1_Update(&key->md, pmac->c, SHA_DIGEST_LENGTH);
417 SHA1_Final(pmac->c, &key->md);
418
419 /* verify HMAC */
420 out += inp_len;
421 len -= inp_len;
422 # if 1
423 {
424 unsigned char *p = out + len - 1 - maxpad - SHA_DIGEST_LENGTH;
425 size_t off = out - p;
426 unsigned int c, cmask;
427
428 maxpad += SHA_DIGEST_LENGTH;
429 for (res = 0, i = 0, j = 0; j < maxpad; j++) {
430 c = p[j];
431 cmask =
432 ((int)(j - off - SHA_DIGEST_LENGTH)) >> (sizeof(int) *
433 8 - 1);
434 res |= (c ^ pad) & ~cmask; /* ... and padding */
435 cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
436 res |= (c ^ pmac->c[i]) & cmask;
437 i += 1 & cmask;
438 }
439 maxpad -= SHA_DIGEST_LENGTH;
440
441 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
442 ret &= (int)~res;
443 }
444 # else
445 for (res = 0, i = 0; i < SHA_DIGEST_LENGTH; i++)
446 res |= out[i] ^ pmac->c[i];
447 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
448 ret &= (int)~res;
449
450 /* verify padding */
451 pad = (pad & ~res) | (maxpad & res);
452 out = out + len - 1 - pad;
453 for (res = 0, i = 0; i < pad; i++)
454 res |= out[i] ^ pad;
455
456 res = (0 - res) >> (sizeof(res) * 8 - 1);
457 ret &= (int)~res;
458 # endif
459 return ret;
460 } else {
461 SHA1_Update(&key->md, out, len);
462 }
463 }
464
465 return 1;
466 }
467
aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)468 static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
469 void *ptr)
470 {
471 EVP_AES_HMAC_SHA1 *key = data(ctx);
472
473 switch (type) {
474 case EVP_CTRL_AEAD_SET_MAC_KEY:
475 {
476 unsigned int i;
477 unsigned char hmac_key[64];
478
479 memset(hmac_key, 0, sizeof(hmac_key));
480
481 if (arg > (int)sizeof(hmac_key)) {
482 SHA1_Init(&key->head);
483 SHA1_Update(&key->head, ptr, arg);
484 SHA1_Final(hmac_key, &key->head);
485 } else {
486 memcpy(hmac_key, ptr, arg);
487 }
488
489 for (i = 0; i < sizeof(hmac_key); i++)
490 hmac_key[i] ^= 0x36; /* ipad */
491 SHA1_Init(&key->head);
492 SHA1_Update(&key->head, hmac_key, sizeof(hmac_key));
493
494 for (i = 0; i < sizeof(hmac_key); i++)
495 hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
496 SHA1_Init(&key->tail);
497 SHA1_Update(&key->tail, hmac_key, sizeof(hmac_key));
498
499 OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
500
501 return 1;
502 }
503 case EVP_CTRL_AEAD_TLS1_AAD:
504 {
505 unsigned char *p = ptr;
506 unsigned int len;
507
508 if (arg != EVP_AEAD_TLS1_AAD_LEN)
509 return -1;
510
511 len = p[arg - 2] << 8 | p[arg - 1];
512
513 if (ctx->encrypt) {
514 key->payload_length = len;
515 if ((key->aux.tls_ver =
516 p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
517 len -= AES_BLOCK_SIZE;
518 p[arg - 2] = len >> 8;
519 p[arg - 1] = len;
520 }
521 key->md = key->head;
522 SHA1_Update(&key->md, p, arg);
523
524 return (int)(((len + SHA_DIGEST_LENGTH +
525 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
526 - len);
527 } else {
528 memcpy(key->aux.tls_aad, ptr, arg);
529 key->payload_length = arg;
530
531 return SHA_DIGEST_LENGTH;
532 }
533 }
534 default:
535 return -1;
536 }
537 }
538
539 static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher = {
540 # ifdef NID_aes_128_cbc_hmac_sha1
541 NID_aes_128_cbc_hmac_sha1,
542 # else
543 NID_undef,
544 # endif
545 16, 16, 16,
546 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
547 EVP_CIPH_FLAG_AEAD_CIPHER,
548 aesni_cbc_hmac_sha1_init_key,
549 aesni_cbc_hmac_sha1_cipher,
550 NULL,
551 sizeof(EVP_AES_HMAC_SHA1),
552 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
553 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
554 aesni_cbc_hmac_sha1_ctrl,
555 NULL
556 };
557
558 static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher = {
559 # ifdef NID_aes_256_cbc_hmac_sha1
560 NID_aes_256_cbc_hmac_sha1,
561 # else
562 NID_undef,
563 # endif
564 16, 32, 16,
565 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
566 EVP_CIPH_FLAG_AEAD_CIPHER,
567 aesni_cbc_hmac_sha1_init_key,
568 aesni_cbc_hmac_sha1_cipher,
569 NULL,
570 sizeof(EVP_AES_HMAC_SHA1),
571 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
572 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
573 aesni_cbc_hmac_sha1_ctrl,
574 NULL
575 };
576
EVP_aes_128_cbc_hmac_sha1(void)577 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
578 {
579 return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
580 &aesni_128_cbc_hmac_sha1_cipher : NULL);
581 }
582
EVP_aes_256_cbc_hmac_sha1(void)583 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
584 {
585 return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
586 &aesni_256_cbc_hmac_sha1_cipher : NULL);
587 }
588 # else
EVP_aes_128_cbc_hmac_sha1(void)589 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
590 {
591 return NULL;
592 }
593
EVP_aes_256_cbc_hmac_sha1(void)594 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
595 {
596 return NULL;
597 }
598 # endif
599 #endif
600