Line data Source code
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 <openssl/rand.h>
62 : # include "modes_lcl.h"
63 :
64 : # ifndef EVP_CIPH_FLAG_AEAD_CIPHER
65 : # define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
66 : # define EVP_CTRL_AEAD_TLS1_AAD 0x16
67 : # define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
68 : # endif
69 :
70 : # if !defined(EVP_CIPH_FLAG_DEFAULT_ASN1)
71 : # define EVP_CIPH_FLAG_DEFAULT_ASN1 0
72 : # endif
73 :
74 : # if !defined(EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK)
75 : # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0
76 : # endif
77 :
78 : # define TLS1_1_VERSION 0x0302
79 :
80 : typedef struct {
81 : AES_KEY ks;
82 : SHA_CTX head, tail, md;
83 : size_t payload_length; /* AAD length in decrypt case */
84 : union {
85 : unsigned int tls_ver;
86 : unsigned char tls_aad[16]; /* 13 used */
87 : } aux;
88 : } EVP_AES_HMAC_SHA1;
89 :
90 : # define NO_PAYLOAD_LENGTH ((size_t)-1)
91 :
92 : # if defined(AES_ASM) && ( \
93 : defined(__x86_64) || defined(__x86_64__) || \
94 : defined(_M_AMD64) || defined(_M_X64) || \
95 : defined(__INTEL__) )
96 :
97 : extern unsigned int OPENSSL_ia32cap_P[];
98 : # define AESNI_CAPABLE (1<<(57-32))
99 :
100 : int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
101 : AES_KEY *key);
102 : int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
103 : AES_KEY *key);
104 :
105 : void aesni_cbc_encrypt(const unsigned char *in,
106 : unsigned char *out,
107 : size_t length,
108 : const AES_KEY *key, unsigned char *ivec, int enc);
109 :
110 : void aesni_cbc_sha1_enc(const void *inp, void *out, size_t blocks,
111 : const AES_KEY *key, unsigned char iv[16],
112 : SHA_CTX *ctx, const void *in0);
113 :
114 : void aesni256_cbc_sha1_dec(const void *inp, void *out, size_t blocks,
115 : const AES_KEY *key, unsigned char iv[16],
116 : SHA_CTX *ctx, const void *in0);
117 :
118 : # define data(ctx) ((EVP_AES_HMAC_SHA1 *)(ctx)->cipher_data)
119 :
120 : static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
121 : const unsigned char *inkey,
122 : const unsigned char *iv, int enc)
123 : {
124 : EVP_AES_HMAC_SHA1 *key = data(ctx);
125 : int ret;
126 :
127 : if (enc)
128 : ret = aesni_set_encrypt_key(inkey, ctx->key_len * 8, &key->ks);
129 : else
130 : ret = aesni_set_decrypt_key(inkey, ctx->key_len * 8, &key->ks);
131 :
132 : SHA1_Init(&key->head); /* handy when benchmarking */
133 : key->tail = key->head;
134 : key->md = key->head;
135 :
136 : key->payload_length = NO_PAYLOAD_LENGTH;
137 :
138 : return ret < 0 ? 0 : 1;
139 : }
140 :
141 : # define STITCHED_CALL
142 : # undef STITCHED_DECRYPT_CALL
143 :
144 : # if !defined(STITCHED_CALL)
145 : # define aes_off 0
146 : # endif
147 :
148 : void sha1_block_data_order(void *c, const void *p, size_t len);
149 :
150 : static void sha1_update(SHA_CTX *c, const void *data, size_t len)
151 : {
152 : const unsigned char *ptr = data;
153 : size_t res;
154 :
155 : if ((res = c->num)) {
156 : res = SHA_CBLOCK - res;
157 : if (len < res)
158 : res = len;
159 : SHA1_Update(c, ptr, res);
160 : ptr += res;
161 : len -= res;
162 : }
163 :
164 : res = len % SHA_CBLOCK;
165 : len -= res;
166 :
167 : if (len) {
168 : sha1_block_data_order(c, ptr, len / SHA_CBLOCK);
169 :
170 : ptr += len;
171 : c->Nh += len >> 29;
172 : c->Nl += len <<= 3;
173 : if (c->Nl < (unsigned int)len)
174 : c->Nh++;
175 : }
176 :
177 : if (res)
178 : SHA1_Update(c, ptr, res);
179 : }
180 :
181 : # ifdef SHA1_Update
182 : # undef SHA1_Update
183 : # endif
184 : # define SHA1_Update sha1_update
185 :
186 : # if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
187 :
188 : typedef struct {
189 : unsigned int A[8], B[8], C[8], D[8], E[8];
190 : } SHA1_MB_CTX;
191 : typedef struct {
192 : const unsigned char *ptr;
193 : int blocks;
194 : } HASH_DESC;
195 :
196 : void sha1_multi_block(SHA1_MB_CTX *, const HASH_DESC *, int);
197 :
198 : typedef struct {
199 : const unsigned char *inp;
200 : unsigned char *out;
201 : int blocks;
202 : u64 iv[2];
203 : } CIPH_DESC;
204 :
205 : void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int);
206 :
207 : static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA1 *key,
208 : unsigned char *out,
209 : const unsigned char *inp,
210 : size_t inp_len, int n4x)
211 : { /* n4x is 1 or 2 */
212 : HASH_DESC hash_d[8], edges[8];
213 : CIPH_DESC ciph_d[8];
214 : unsigned char storage[sizeof(SHA1_MB_CTX) + 32];
215 : union {
216 : u64 q[16];
217 : u32 d[32];
218 : u8 c[128];
219 : } blocks[8];
220 : SHA1_MB_CTX *ctx;
221 : unsigned int frag, last, packlen, i, x4 = 4 * n4x, minblocks, processed =
222 : 0;
223 : size_t ret = 0;
224 : u8 *IVs;
225 : # if defined(BSWAP8)
226 : u64 seqnum;
227 : # endif
228 :
229 : /* ask for IVs in bulk */
230 : if (RAND_bytes((IVs = blocks[0].c), 16 * x4) <= 0)
231 : return 0;
232 :
233 : ctx = (SHA1_MB_CTX *) (storage + 32 - ((size_t)storage % 32)); /* align */
234 :
235 : frag = (unsigned int)inp_len >> (1 + n4x);
236 : last = (unsigned int)inp_len + frag - (frag << (1 + n4x));
237 : if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) {
238 : frag++;
239 : last -= x4 - 1;
240 : }
241 :
242 : packlen = 5 + 16 + ((frag + 20 + 16) & -16);
243 :
244 : /* populate descriptors with pointers and IVs */
245 : hash_d[0].ptr = inp;
246 : ciph_d[0].inp = inp;
247 : /* 5+16 is place for header and explicit IV */
248 : ciph_d[0].out = out + 5 + 16;
249 : memcpy(ciph_d[0].out - 16, IVs, 16);
250 : memcpy(ciph_d[0].iv, IVs, 16);
251 : IVs += 16;
252 :
253 : for (i = 1; i < x4; i++) {
254 : ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag;
255 : ciph_d[i].out = ciph_d[i - 1].out + packlen;
256 : memcpy(ciph_d[i].out - 16, IVs, 16);
257 : memcpy(ciph_d[i].iv, IVs, 16);
258 : IVs += 16;
259 : }
260 :
261 : # if defined(BSWAP8)
262 : memcpy(blocks[0].c, key->md.data, 8);
263 : seqnum = BSWAP8(blocks[0].q[0]);
264 : # endif
265 : for (i = 0; i < x4; i++) {
266 : unsigned int len = (i == (x4 - 1) ? last : frag);
267 : # if !defined(BSWAP8)
268 : unsigned int carry, j;
269 : # endif
270 :
271 : ctx->A[i] = key->md.h0;
272 : ctx->B[i] = key->md.h1;
273 : ctx->C[i] = key->md.h2;
274 : ctx->D[i] = key->md.h3;
275 : ctx->E[i] = key->md.h4;
276 :
277 : /* fix seqnum */
278 : # if defined(BSWAP8)
279 : blocks[i].q[0] = BSWAP8(seqnum + i);
280 : # else
281 : for (carry = i, j = 8; j--;) {
282 : blocks[i].c[j] = ((u8 *)key->md.data)[j] + carry;
283 : carry = (blocks[i].c[j] - carry) >> (sizeof(carry) * 8 - 1);
284 : }
285 : # endif
286 : blocks[i].c[8] = ((u8 *)key->md.data)[8];
287 : blocks[i].c[9] = ((u8 *)key->md.data)[9];
288 : blocks[i].c[10] = ((u8 *)key->md.data)[10];
289 : /* fix length */
290 : blocks[i].c[11] = (u8)(len >> 8);
291 : blocks[i].c[12] = (u8)(len);
292 :
293 : memcpy(blocks[i].c + 13, hash_d[i].ptr, 64 - 13);
294 : hash_d[i].ptr += 64 - 13;
295 : hash_d[i].blocks = (len - (64 - 13)) / 64;
296 :
297 : edges[i].ptr = blocks[i].c;
298 : edges[i].blocks = 1;
299 : }
300 :
301 : /* hash 13-byte headers and first 64-13 bytes of inputs */
302 : sha1_multi_block(ctx, edges, n4x);
303 : /* hash bulk inputs */
304 : # define MAXCHUNKSIZE 2048
305 : # if MAXCHUNKSIZE%64
306 : # error "MAXCHUNKSIZE is not divisible by 64"
307 : # elif MAXCHUNKSIZE
308 : /*
309 : * goal is to minimize pressure on L1 cache by moving in shorter steps,
310 : * so that hashed data is still in the cache by the time we encrypt it
311 : */
312 : minblocks = ((frag <= last ? frag : last) - (64 - 13)) / 64;
313 : if (minblocks > MAXCHUNKSIZE / 64) {
314 : for (i = 0; i < x4; i++) {
315 : edges[i].ptr = hash_d[i].ptr;
316 : edges[i].blocks = MAXCHUNKSIZE / 64;
317 : ciph_d[i].blocks = MAXCHUNKSIZE / 16;
318 : }
319 : do {
320 : sha1_multi_block(ctx, edges, n4x);
321 : aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
322 :
323 : for (i = 0; i < x4; i++) {
324 : edges[i].ptr = hash_d[i].ptr += MAXCHUNKSIZE;
325 : hash_d[i].blocks -= MAXCHUNKSIZE / 64;
326 : edges[i].blocks = MAXCHUNKSIZE / 64;
327 : ciph_d[i].inp += MAXCHUNKSIZE;
328 : ciph_d[i].out += MAXCHUNKSIZE;
329 : ciph_d[i].blocks = MAXCHUNKSIZE / 16;
330 : memcpy(ciph_d[i].iv, ciph_d[i].out - 16, 16);
331 : }
332 : processed += MAXCHUNKSIZE;
333 : minblocks -= MAXCHUNKSIZE / 64;
334 : } while (minblocks > MAXCHUNKSIZE / 64);
335 : }
336 : # endif
337 : # undef MAXCHUNKSIZE
338 : sha1_multi_block(ctx, hash_d, n4x);
339 :
340 : memset(blocks, 0, sizeof(blocks));
341 : for (i = 0; i < x4; i++) {
342 : unsigned int len = (i == (x4 - 1) ? last : frag),
343 : off = hash_d[i].blocks * 64;
344 : const unsigned char *ptr = hash_d[i].ptr + off;
345 :
346 : off = (len - processed) - (64 - 13) - off; /* remainder actually */
347 : memcpy(blocks[i].c, ptr, off);
348 : blocks[i].c[off] = 0x80;
349 : len += 64 + 13; /* 64 is HMAC header */
350 : len *= 8; /* convert to bits */
351 : if (off < (64 - 8)) {
352 : # ifdef BSWAP4
353 : blocks[i].d[15] = BSWAP4(len);
354 : # else
355 : PUTU32(blocks[i].c + 60, len);
356 : # endif
357 : edges[i].blocks = 1;
358 : } else {
359 : # ifdef BSWAP4
360 : blocks[i].d[31] = BSWAP4(len);
361 : # else
362 : PUTU32(blocks[i].c + 124, len);
363 : # endif
364 : edges[i].blocks = 2;
365 : }
366 : edges[i].ptr = blocks[i].c;
367 : }
368 :
369 : /* hash input tails and finalize */
370 : sha1_multi_block(ctx, edges, n4x);
371 :
372 : memset(blocks, 0, sizeof(blocks));
373 : for (i = 0; i < x4; i++) {
374 : # ifdef BSWAP4
375 : blocks[i].d[0] = BSWAP4(ctx->A[i]);
376 : ctx->A[i] = key->tail.h0;
377 : blocks[i].d[1] = BSWAP4(ctx->B[i]);
378 : ctx->B[i] = key->tail.h1;
379 : blocks[i].d[2] = BSWAP4(ctx->C[i]);
380 : ctx->C[i] = key->tail.h2;
381 : blocks[i].d[3] = BSWAP4(ctx->D[i]);
382 : ctx->D[i] = key->tail.h3;
383 : blocks[i].d[4] = BSWAP4(ctx->E[i]);
384 : ctx->E[i] = key->tail.h4;
385 : blocks[i].c[20] = 0x80;
386 : blocks[i].d[15] = BSWAP4((64 + 20) * 8);
387 : # else
388 : PUTU32(blocks[i].c + 0, ctx->A[i]);
389 : ctx->A[i] = key->tail.h0;
390 : PUTU32(blocks[i].c + 4, ctx->B[i]);
391 : ctx->B[i] = key->tail.h1;
392 : PUTU32(blocks[i].c + 8, ctx->C[i]);
393 : ctx->C[i] = key->tail.h2;
394 : PUTU32(blocks[i].c + 12, ctx->D[i]);
395 : ctx->D[i] = key->tail.h3;
396 : PUTU32(blocks[i].c + 16, ctx->E[i]);
397 : ctx->E[i] = key->tail.h4;
398 : blocks[i].c[20] = 0x80;
399 : PUTU32(blocks[i].c + 60, (64 + 20) * 8);
400 : # endif
401 : edges[i].ptr = blocks[i].c;
402 : edges[i].blocks = 1;
403 : }
404 :
405 : /* finalize MACs */
406 : sha1_multi_block(ctx, edges, n4x);
407 :
408 : for (i = 0; i < x4; i++) {
409 : unsigned int len = (i == (x4 - 1) ? last : frag), pad, j;
410 : unsigned char *out0 = out;
411 :
412 : memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed);
413 : ciph_d[i].inp = ciph_d[i].out;
414 :
415 : out += 5 + 16 + len;
416 :
417 : /* write MAC */
418 : PUTU32(out + 0, ctx->A[i]);
419 : PUTU32(out + 4, ctx->B[i]);
420 : PUTU32(out + 8, ctx->C[i]);
421 : PUTU32(out + 12, ctx->D[i]);
422 : PUTU32(out + 16, ctx->E[i]);
423 : out += 20;
424 : len += 20;
425 :
426 : /* pad */
427 : pad = 15 - len % 16;
428 : for (j = 0; j <= pad; j++)
429 : *(out++) = pad;
430 : len += pad + 1;
431 :
432 : ciph_d[i].blocks = (len - processed) / 16;
433 : len += 16; /* account for explicit iv */
434 :
435 : /* arrange header */
436 : out0[0] = ((u8 *)key->md.data)[8];
437 : out0[1] = ((u8 *)key->md.data)[9];
438 : out0[2] = ((u8 *)key->md.data)[10];
439 : out0[3] = (u8)(len >> 8);
440 : out0[4] = (u8)(len);
441 :
442 : ret += len + 5;
443 : inp += frag;
444 : }
445 :
446 : aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
447 :
448 : OPENSSL_cleanse(blocks, sizeof(blocks));
449 : OPENSSL_cleanse(ctx, sizeof(*ctx));
450 :
451 : return ret;
452 : }
453 : # endif
454 :
455 : static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
456 : const unsigned char *in, size_t len)
457 : {
458 : EVP_AES_HMAC_SHA1 *key = data(ctx);
459 : unsigned int l;
460 : size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
461 : * later */
462 : sha_off = 0;
463 : # if defined(STITCHED_CALL)
464 : size_t aes_off = 0, blocks;
465 :
466 : sha_off = SHA_CBLOCK - key->md.num;
467 : # endif
468 :
469 : key->payload_length = NO_PAYLOAD_LENGTH;
470 :
471 : if (len % AES_BLOCK_SIZE)
472 : return 0;
473 :
474 : if (ctx->encrypt) {
475 : if (plen == NO_PAYLOAD_LENGTH)
476 : plen = len;
477 : else if (len !=
478 : ((plen + SHA_DIGEST_LENGTH +
479 : AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
480 : return 0;
481 : else if (key->aux.tls_ver >= TLS1_1_VERSION)
482 : iv = AES_BLOCK_SIZE;
483 :
484 : # if defined(STITCHED_CALL)
485 : if (plen > (sha_off + iv)
486 : && (blocks = (plen - (sha_off + iv)) / SHA_CBLOCK)) {
487 : SHA1_Update(&key->md, in + iv, sha_off);
488 :
489 : aesni_cbc_sha1_enc(in, out, blocks, &key->ks,
490 : ctx->iv, &key->md, in + iv + sha_off);
491 : blocks *= SHA_CBLOCK;
492 : aes_off += blocks;
493 : sha_off += blocks;
494 : key->md.Nh += blocks >> 29;
495 : key->md.Nl += blocks <<= 3;
496 : if (key->md.Nl < (unsigned int)blocks)
497 : key->md.Nh++;
498 : } else {
499 : sha_off = 0;
500 : }
501 : # endif
502 : sha_off += iv;
503 : SHA1_Update(&key->md, in + sha_off, plen - sha_off);
504 :
505 : if (plen != len) { /* "TLS" mode of operation */
506 : if (in != out)
507 : memcpy(out + aes_off, in + aes_off, plen - aes_off);
508 :
509 : /* calculate HMAC and append it to payload */
510 : SHA1_Final(out + plen, &key->md);
511 : key->md = key->tail;
512 : SHA1_Update(&key->md, out + plen, SHA_DIGEST_LENGTH);
513 : SHA1_Final(out + plen, &key->md);
514 :
515 : /* pad the payload|hmac */
516 : plen += SHA_DIGEST_LENGTH;
517 : for (l = len - plen - 1; plen < len; plen++)
518 : out[plen] = l;
519 : /* encrypt HMAC|padding at once */
520 : aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
521 : &key->ks, ctx->iv, 1);
522 : } else {
523 : aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
524 : &key->ks, ctx->iv, 1);
525 : }
526 : } else {
527 : union {
528 : unsigned int u[SHA_DIGEST_LENGTH / sizeof(unsigned int)];
529 : unsigned char c[32 + SHA_DIGEST_LENGTH];
530 : } mac, *pmac;
531 :
532 : /* arrange cache line alignment */
533 : pmac = (void *)(((size_t)mac.c + 31) & ((size_t)0 - 32));
534 :
535 : if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
536 : size_t inp_len, mask, j, i;
537 : unsigned int res, maxpad, pad, bitlen;
538 : int ret = 1;
539 : union {
540 : unsigned int u[SHA_LBLOCK];
541 : unsigned char c[SHA_CBLOCK];
542 : } *data = (void *)key->md.data;
543 : # if defined(STITCHED_DECRYPT_CALL)
544 : unsigned char tail_iv[AES_BLOCK_SIZE];
545 : int stitch = 0;
546 : # endif
547 :
548 : if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
549 : >= TLS1_1_VERSION) {
550 : if (len < (AES_BLOCK_SIZE + SHA_DIGEST_LENGTH + 1))
551 : return 0;
552 :
553 : /* omit explicit iv */
554 : memcpy(ctx->iv, in, AES_BLOCK_SIZE);
555 : in += AES_BLOCK_SIZE;
556 : out += AES_BLOCK_SIZE;
557 : len -= AES_BLOCK_SIZE;
558 : } else if (len < (SHA_DIGEST_LENGTH + 1))
559 : return 0;
560 :
561 : # if defined(STITCHED_DECRYPT_CALL)
562 : if (len >= 1024 && ctx->key_len == 32) {
563 : /* decrypt last block */
564 : memcpy(tail_iv, in + len - 2 * AES_BLOCK_SIZE,
565 : AES_BLOCK_SIZE);
566 : aesni_cbc_encrypt(in + len - AES_BLOCK_SIZE,
567 : out + len - AES_BLOCK_SIZE, AES_BLOCK_SIZE,
568 : &key->ks, tail_iv, 0);
569 : stitch = 1;
570 : } else
571 : # endif
572 : /* decrypt HMAC|padding at once */
573 : aesni_cbc_encrypt(in, out, len, &key->ks, ctx->iv, 0);
574 :
575 : /* figure out payload length */
576 : pad = out[len - 1];
577 : maxpad = len - (SHA_DIGEST_LENGTH + 1);
578 : maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
579 : maxpad &= 255;
580 :
581 : inp_len = len - (SHA_DIGEST_LENGTH + pad + 1);
582 : mask = (0 - ((inp_len - len) >> (sizeof(inp_len) * 8 - 1)));
583 : inp_len &= mask;
584 : ret &= (int)mask;
585 :
586 : key->aux.tls_aad[plen - 2] = inp_len >> 8;
587 : key->aux.tls_aad[plen - 1] = inp_len;
588 :
589 : /* calculate HMAC */
590 : key->md = key->head;
591 : SHA1_Update(&key->md, key->aux.tls_aad, plen);
592 :
593 : # if defined(STITCHED_DECRYPT_CALL)
594 : if (stitch) {
595 : blocks = (len - (256 + 32 + SHA_CBLOCK)) / SHA_CBLOCK;
596 : aes_off = len - AES_BLOCK_SIZE - blocks * SHA_CBLOCK;
597 : sha_off = SHA_CBLOCK - plen;
598 :
599 : aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
600 :
601 : SHA1_Update(&key->md, out, sha_off);
602 : aesni256_cbc_sha1_dec(in + aes_off,
603 : out + aes_off, blocks, &key->ks,
604 : ctx->iv, &key->md, out + sha_off);
605 :
606 : sha_off += blocks *= SHA_CBLOCK;
607 : out += sha_off;
608 : len -= sha_off;
609 : inp_len -= sha_off;
610 :
611 : key->md.Nl += (blocks << 3); /* at most 18 bits */
612 : memcpy(ctx->iv, tail_iv, AES_BLOCK_SIZE);
613 : }
614 : # endif
615 :
616 : # if 1
617 : len -= SHA_DIGEST_LENGTH; /* amend mac */
618 : if (len >= (256 + SHA_CBLOCK)) {
619 : j = (len - (256 + SHA_CBLOCK)) & (0 - SHA_CBLOCK);
620 : j += SHA_CBLOCK - key->md.num;
621 : SHA1_Update(&key->md, out, j);
622 : out += j;
623 : len -= j;
624 : inp_len -= j;
625 : }
626 :
627 : /* but pretend as if we hashed padded payload */
628 : bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
629 : # ifdef BSWAP4
630 : bitlen = BSWAP4(bitlen);
631 : # else
632 : mac.c[0] = 0;
633 : mac.c[1] = (unsigned char)(bitlen >> 16);
634 : mac.c[2] = (unsigned char)(bitlen >> 8);
635 : mac.c[3] = (unsigned char)bitlen;
636 : bitlen = mac.u[0];
637 : # endif
638 :
639 : pmac->u[0] = 0;
640 : pmac->u[1] = 0;
641 : pmac->u[2] = 0;
642 : pmac->u[3] = 0;
643 : pmac->u[4] = 0;
644 :
645 : for (res = key->md.num, j = 0; j < len; j++) {
646 : size_t c = out[j];
647 : mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
648 : c &= mask;
649 : c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
650 : data->c[res++] = (unsigned char)c;
651 :
652 : if (res != SHA_CBLOCK)
653 : continue;
654 :
655 : /* j is not incremented yet */
656 : mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
657 : data->u[SHA_LBLOCK - 1] |= bitlen & mask;
658 : sha1_block_data_order(&key->md, data, 1);
659 : mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
660 : pmac->u[0] |= key->md.h0 & mask;
661 : pmac->u[1] |= key->md.h1 & mask;
662 : pmac->u[2] |= key->md.h2 & mask;
663 : pmac->u[3] |= key->md.h3 & mask;
664 : pmac->u[4] |= key->md.h4 & mask;
665 : res = 0;
666 : }
667 :
668 : for (i = res; i < SHA_CBLOCK; i++, j++)
669 : data->c[i] = 0;
670 :
671 : if (res > SHA_CBLOCK - 8) {
672 : mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
673 : data->u[SHA_LBLOCK - 1] |= bitlen & mask;
674 : sha1_block_data_order(&key->md, data, 1);
675 : mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
676 : pmac->u[0] |= key->md.h0 & mask;
677 : pmac->u[1] |= key->md.h1 & mask;
678 : pmac->u[2] |= key->md.h2 & mask;
679 : pmac->u[3] |= key->md.h3 & mask;
680 : pmac->u[4] |= key->md.h4 & mask;
681 :
682 : memset(data, 0, SHA_CBLOCK);
683 : j += 64;
684 : }
685 : data->u[SHA_LBLOCK - 1] = bitlen;
686 : sha1_block_data_order(&key->md, data, 1);
687 : mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
688 : pmac->u[0] |= key->md.h0 & mask;
689 : pmac->u[1] |= key->md.h1 & mask;
690 : pmac->u[2] |= key->md.h2 & mask;
691 : pmac->u[3] |= key->md.h3 & mask;
692 : pmac->u[4] |= key->md.h4 & mask;
693 :
694 : # ifdef BSWAP4
695 : pmac->u[0] = BSWAP4(pmac->u[0]);
696 : pmac->u[1] = BSWAP4(pmac->u[1]);
697 : pmac->u[2] = BSWAP4(pmac->u[2]);
698 : pmac->u[3] = BSWAP4(pmac->u[3]);
699 : pmac->u[4] = BSWAP4(pmac->u[4]);
700 : # else
701 : for (i = 0; i < 5; i++) {
702 : res = pmac->u[i];
703 : pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
704 : pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
705 : pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
706 : pmac->c[4 * i + 3] = (unsigned char)res;
707 : }
708 : # endif
709 : len += SHA_DIGEST_LENGTH;
710 : # else
711 : SHA1_Update(&key->md, out, inp_len);
712 : res = key->md.num;
713 : SHA1_Final(pmac->c, &key->md);
714 :
715 : {
716 : unsigned int inp_blocks, pad_blocks;
717 :
718 : /* but pretend as if we hashed padded payload */
719 : inp_blocks =
720 : 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
721 : res += (unsigned int)(len - inp_len);
722 : pad_blocks = res / SHA_CBLOCK;
723 : res %= SHA_CBLOCK;
724 : pad_blocks +=
725 : 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
726 : for (; inp_blocks < pad_blocks; inp_blocks++)
727 : sha1_block_data_order(&key->md, data, 1);
728 : }
729 : # endif
730 : key->md = key->tail;
731 : SHA1_Update(&key->md, pmac->c, SHA_DIGEST_LENGTH);
732 : SHA1_Final(pmac->c, &key->md);
733 :
734 : /* verify HMAC */
735 : out += inp_len;
736 : len -= inp_len;
737 : # if 1
738 : {
739 : unsigned char *p = out + len - 1 - maxpad - SHA_DIGEST_LENGTH;
740 : size_t off = out - p;
741 : unsigned int c, cmask;
742 :
743 : maxpad += SHA_DIGEST_LENGTH;
744 : for (res = 0, i = 0, j = 0; j < maxpad; j++) {
745 : c = p[j];
746 : cmask =
747 : ((int)(j - off - SHA_DIGEST_LENGTH)) >> (sizeof(int) *
748 : 8 - 1);
749 : res |= (c ^ pad) & ~cmask; /* ... and padding */
750 : cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
751 : res |= (c ^ pmac->c[i]) & cmask;
752 : i += 1 & cmask;
753 : }
754 : maxpad -= SHA_DIGEST_LENGTH;
755 :
756 : res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
757 : ret &= (int)~res;
758 : }
759 : # else
760 : for (res = 0, i = 0; i < SHA_DIGEST_LENGTH; i++)
761 : res |= out[i] ^ pmac->c[i];
762 : res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
763 : ret &= (int)~res;
764 :
765 : /* verify padding */
766 : pad = (pad & ~res) | (maxpad & res);
767 : out = out + len - 1 - pad;
768 : for (res = 0, i = 0; i < pad; i++)
769 : res |= out[i] ^ pad;
770 :
771 : res = (0 - res) >> (sizeof(res) * 8 - 1);
772 : ret &= (int)~res;
773 : # endif
774 : return ret;
775 : } else {
776 : # if defined(STITCHED_DECRYPT_CALL)
777 : if (len >= 1024 && ctx->key_len == 32) {
778 : if (sha_off %= SHA_CBLOCK)
779 : blocks = (len - 3 * SHA_CBLOCK) / SHA_CBLOCK;
780 : else
781 : blocks = (len - 2 * SHA_CBLOCK) / SHA_CBLOCK;
782 : aes_off = len - blocks * SHA_CBLOCK;
783 :
784 : aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
785 : SHA1_Update(&key->md, out, sha_off);
786 : aesni256_cbc_sha1_dec(in + aes_off,
787 : out + aes_off, blocks, &key->ks,
788 : ctx->iv, &key->md, out + sha_off);
789 :
790 : sha_off += blocks *= SHA_CBLOCK;
791 : out += sha_off;
792 : len -= sha_off;
793 :
794 : key->md.Nh += blocks >> 29;
795 : key->md.Nl += blocks <<= 3;
796 : if (key->md.Nl < (unsigned int)blocks)
797 : key->md.Nh++;
798 : } else
799 : # endif
800 : /* decrypt HMAC|padding at once */
801 : aesni_cbc_encrypt(in, out, len, &key->ks, ctx->iv, 0);
802 :
803 : SHA1_Update(&key->md, out, len);
804 : }
805 : }
806 :
807 : return 1;
808 : }
809 :
810 : static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
811 : void *ptr)
812 : {
813 : EVP_AES_HMAC_SHA1 *key = data(ctx);
814 :
815 : switch (type) {
816 : case EVP_CTRL_AEAD_SET_MAC_KEY:
817 : {
818 : unsigned int i;
819 : unsigned char hmac_key[64];
820 :
821 : memset(hmac_key, 0, sizeof(hmac_key));
822 :
823 : if (arg > (int)sizeof(hmac_key)) {
824 : SHA1_Init(&key->head);
825 : SHA1_Update(&key->head, ptr, arg);
826 : SHA1_Final(hmac_key, &key->head);
827 : } else {
828 : memcpy(hmac_key, ptr, arg);
829 : }
830 :
831 : for (i = 0; i < sizeof(hmac_key); i++)
832 : hmac_key[i] ^= 0x36; /* ipad */
833 : SHA1_Init(&key->head);
834 : SHA1_Update(&key->head, hmac_key, sizeof(hmac_key));
835 :
836 : for (i = 0; i < sizeof(hmac_key); i++)
837 : hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
838 : SHA1_Init(&key->tail);
839 : SHA1_Update(&key->tail, hmac_key, sizeof(hmac_key));
840 :
841 : OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
842 :
843 : return 1;
844 : }
845 : case EVP_CTRL_AEAD_TLS1_AAD:
846 : {
847 : unsigned char *p = ptr;
848 : unsigned int len;
849 :
850 : if (arg != EVP_AEAD_TLS1_AAD_LEN)
851 : return -1;
852 :
853 : len = p[arg - 2] << 8 | p[arg - 1];
854 :
855 : if (ctx->encrypt) {
856 : key->payload_length = len;
857 : if ((key->aux.tls_ver =
858 : p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
859 : len -= AES_BLOCK_SIZE;
860 : p[arg - 2] = len >> 8;
861 : p[arg - 1] = len;
862 : }
863 : key->md = key->head;
864 : SHA1_Update(&key->md, p, arg);
865 :
866 : return (int)(((len + SHA_DIGEST_LENGTH +
867 : AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
868 : - len);
869 : } else {
870 : memcpy(key->aux.tls_aad, ptr, arg);
871 : key->payload_length = arg;
872 :
873 : return SHA_DIGEST_LENGTH;
874 : }
875 : }
876 : # if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
877 : case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
878 : return (int)(5 + 16 + ((arg + 20 + 16) & -16));
879 : case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
880 : {
881 : EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
882 : (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
883 : unsigned int n4x = 1, x4;
884 : unsigned int frag, last, packlen, inp_len;
885 :
886 : if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
887 : return -1;
888 :
889 : inp_len = param->inp[11] << 8 | param->inp[12];
890 :
891 : if (ctx->encrypt) {
892 : if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION)
893 : return -1;
894 :
895 : if (inp_len) {
896 : if (inp_len < 4096)
897 : return 0; /* too short */
898 :
899 : if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5))
900 : n4x = 2; /* AVX2 */
901 : } else if ((n4x = param->interleave / 4) && n4x <= 2)
902 : inp_len = param->len;
903 : else
904 : return -1;
905 :
906 : key->md = key->head;
907 : SHA1_Update(&key->md, param->inp, 13);
908 :
909 : x4 = 4 * n4x;
910 : n4x += 1;
911 :
912 : frag = inp_len >> n4x;
913 : last = inp_len + frag - (frag << n4x);
914 : if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) {
915 : frag++;
916 : last -= x4 - 1;
917 : }
918 :
919 : packlen = 5 + 16 + ((frag + 20 + 16) & -16);
920 : packlen = (packlen << n4x) - packlen;
921 : packlen += 5 + 16 + ((last + 20 + 16) & -16);
922 :
923 : param->interleave = x4;
924 :
925 : return (int)packlen;
926 : } else
927 : return -1; /* not yet */
928 : }
929 : case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
930 : {
931 : EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
932 : (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
933 :
934 : return (int)tls1_1_multi_block_encrypt(key, param->out,
935 : param->inp, param->len,
936 : param->interleave / 4);
937 : }
938 : case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
939 : # endif
940 : default:
941 : return -1;
942 : }
943 : }
944 :
945 : static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher = {
946 : # ifdef NID_aes_128_cbc_hmac_sha1
947 : NID_aes_128_cbc_hmac_sha1,
948 : # else
949 : NID_undef,
950 : # endif
951 : 16, 16, 16,
952 : EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
953 : EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
954 : aesni_cbc_hmac_sha1_init_key,
955 : aesni_cbc_hmac_sha1_cipher,
956 : NULL,
957 : sizeof(EVP_AES_HMAC_SHA1),
958 : EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
959 : EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
960 : aesni_cbc_hmac_sha1_ctrl,
961 : NULL
962 : };
963 :
964 : static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher = {
965 : # ifdef NID_aes_256_cbc_hmac_sha1
966 : NID_aes_256_cbc_hmac_sha1,
967 : # else
968 : NID_undef,
969 : # endif
970 : 16, 32, 16,
971 : EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
972 : EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
973 : aesni_cbc_hmac_sha1_init_key,
974 : aesni_cbc_hmac_sha1_cipher,
975 : NULL,
976 : sizeof(EVP_AES_HMAC_SHA1),
977 : EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
978 : EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
979 : aesni_cbc_hmac_sha1_ctrl,
980 : NULL
981 : };
982 :
983 : const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
984 : {
985 : return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
986 : &aesni_128_cbc_hmac_sha1_cipher : NULL);
987 : }
988 :
989 : const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
990 : {
991 : return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
992 : &aesni_256_cbc_hmac_sha1_cipher : NULL);
993 : }
994 : # else
995 242 : const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
996 : {
997 242 : return NULL;
998 : }
999 :
1000 242 : const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
1001 : {
1002 242 : return NULL;
1003 : }
1004 : # endif
1005 : #endif
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