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[thirdparty/openssl.git] / crypto / evp / e_aes_cbc_hmac_sha256.c
1 /*
2 * Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <stdio.h>
11 #include <string.h>
12 #include <openssl/opensslconf.h>
13 #include <openssl/evp.h>
14 #include <openssl/objects.h>
15 #include <openssl/aes.h>
16 #include <openssl/sha.h>
17 #include <openssl/rand.h>
18 #include "internal/cryptlib.h"
19 #include "crypto/modes.h"
20 #include "internal/constant_time_locl.h"
21 #include "crypto/evp.h"
22
23 typedef struct {
24 AES_KEY ks;
25 SHA256_CTX head, tail, md;
26 size_t payload_length; /* AAD length in decrypt case */
27 union {
28 unsigned int tls_ver;
29 unsigned char tls_aad[16]; /* 13 used */
30 } aux;
31 } EVP_AES_HMAC_SHA256;
32
33 # define NO_PAYLOAD_LENGTH ((size_t)-1)
34
35 #if defined(AES_ASM) && ( \
36 defined(__x86_64) || defined(__x86_64__) || \
37 defined(_M_AMD64) || defined(_M_X64) )
38
39 # define AESNI_CAPABLE (1<<(57-32))
40
41 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
42 AES_KEY *key);
43 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
44 AES_KEY *key);
45
46 void aesni_cbc_encrypt(const unsigned char *in,
47 unsigned char *out,
48 size_t length,
49 const AES_KEY *key, unsigned char *ivec, int enc);
50
51 int aesni_cbc_sha256_enc(const void *inp, void *out, size_t blocks,
52 const AES_KEY *key, unsigned char iv[16],
53 SHA256_CTX *ctx, const void *in0);
54
55 # define data(ctx) ((EVP_AES_HMAC_SHA256 *)EVP_CIPHER_CTX_get_cipher_data(ctx))
56
57 static int aesni_cbc_hmac_sha256_init_key(EVP_CIPHER_CTX *ctx,
58 const unsigned char *inkey,
59 const unsigned char *iv, int enc)
60 {
61 EVP_AES_HMAC_SHA256 *key = data(ctx);
62 int ret;
63
64 if (enc)
65 ret = aesni_set_encrypt_key(inkey,
66 EVP_CIPHER_CTX_key_length(ctx) * 8,
67 &key->ks);
68 else
69 ret = aesni_set_decrypt_key(inkey,
70 EVP_CIPHER_CTX_key_length(ctx) * 8,
71 &key->ks);
72
73 SHA256_Init(&key->head); /* handy when benchmarking */
74 key->tail = key->head;
75 key->md = key->head;
76
77 key->payload_length = NO_PAYLOAD_LENGTH;
78
79 return ret < 0 ? 0 : 1;
80 }
81
82 # define STITCHED_CALL
83
84 # if !defined(STITCHED_CALL)
85 # define aes_off 0
86 # endif
87
88 void sha256_block_data_order(void *c, const void *p, size_t len);
89
90 static void sha256_update(SHA256_CTX *c, const void *data, size_t len)
91 {
92 const unsigned char *ptr = data;
93 size_t res;
94
95 if ((res = c->num)) {
96 res = SHA256_CBLOCK - res;
97 if (len < res)
98 res = len;
99 SHA256_Update(c, ptr, res);
100 ptr += res;
101 len -= res;
102 }
103
104 res = len % SHA256_CBLOCK;
105 len -= res;
106
107 if (len) {
108 sha256_block_data_order(c, ptr, len / SHA256_CBLOCK);
109
110 ptr += len;
111 c->Nh += len >> 29;
112 c->Nl += len <<= 3;
113 if (c->Nl < (unsigned int)len)
114 c->Nh++;
115 }
116
117 if (res)
118 SHA256_Update(c, ptr, res);
119 }
120
121 # ifdef SHA256_Update
122 # undef SHA256_Update
123 # endif
124 # define SHA256_Update sha256_update
125
126 # if !defined(OPENSSL_NO_MULTIBLOCK)
127
128 typedef struct {
129 unsigned int A[8], B[8], C[8], D[8], E[8], F[8], G[8], H[8];
130 } SHA256_MB_CTX;
131 typedef struct {
132 const unsigned char *ptr;
133 int blocks;
134 } HASH_DESC;
135
136 void sha256_multi_block(SHA256_MB_CTX *, const HASH_DESC *, int);
137
138 typedef struct {
139 const unsigned char *inp;
140 unsigned char *out;
141 int blocks;
142 u64 iv[2];
143 } CIPH_DESC;
144
145 void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int);
146
147 static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA256 *key,
148 unsigned char *out,
149 const unsigned char *inp,
150 size_t inp_len, int n4x)
151 { /* n4x is 1 or 2 */
152 HASH_DESC hash_d[8], edges[8];
153 CIPH_DESC ciph_d[8];
154 unsigned char storage[sizeof(SHA256_MB_CTX) + 32];
155 union {
156 u64 q[16];
157 u32 d[32];
158 u8 c[128];
159 } blocks[8];
160 SHA256_MB_CTX *ctx;
161 unsigned int frag, last, packlen, i, x4 = 4 * n4x, minblocks, processed =
162 0;
163 size_t ret = 0;
164 u8 *IVs;
165 # if defined(BSWAP8)
166 u64 seqnum;
167 # endif
168
169 /* ask for IVs in bulk */
170 if (RAND_bytes((IVs = blocks[0].c), 16 * x4) <= 0)
171 return 0;
172
173 /* align */
174 ctx = (SHA256_MB_CTX *) (storage + 32 - ((size_t)storage % 32));
175
176 frag = (unsigned int)inp_len >> (1 + n4x);
177 last = (unsigned int)inp_len + frag - (frag << (1 + n4x));
178 if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) {
179 frag++;
180 last -= x4 - 1;
181 }
182
183 packlen = 5 + 16 + ((frag + 32 + 16) & -16);
184
185 /* populate descriptors with pointers and IVs */
186 hash_d[0].ptr = inp;
187 ciph_d[0].inp = inp;
188 /* 5+16 is place for header and explicit IV */
189 ciph_d[0].out = out + 5 + 16;
190 memcpy(ciph_d[0].out - 16, IVs, 16);
191 memcpy(ciph_d[0].iv, IVs, 16);
192 IVs += 16;
193
194 for (i = 1; i < x4; i++) {
195 ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag;
196 ciph_d[i].out = ciph_d[i - 1].out + packlen;
197 memcpy(ciph_d[i].out - 16, IVs, 16);
198 memcpy(ciph_d[i].iv, IVs, 16);
199 IVs += 16;
200 }
201
202 # if defined(BSWAP8)
203 memcpy(blocks[0].c, key->md.data, 8);
204 seqnum = BSWAP8(blocks[0].q[0]);
205 # endif
206 for (i = 0; i < x4; i++) {
207 unsigned int len = (i == (x4 - 1) ? last : frag);
208 # if !defined(BSWAP8)
209 unsigned int carry, j;
210 # endif
211
212 ctx->A[i] = key->md.h[0];
213 ctx->B[i] = key->md.h[1];
214 ctx->C[i] = key->md.h[2];
215 ctx->D[i] = key->md.h[3];
216 ctx->E[i] = key->md.h[4];
217 ctx->F[i] = key->md.h[5];
218 ctx->G[i] = key->md.h[6];
219 ctx->H[i] = key->md.h[7];
220
221 /* fix seqnum */
222 # if defined(BSWAP8)
223 blocks[i].q[0] = BSWAP8(seqnum + i);
224 # else
225 for (carry = i, j = 8; j--;) {
226 blocks[i].c[j] = ((u8 *)key->md.data)[j] + carry;
227 carry = (blocks[i].c[j] - carry) >> (sizeof(carry) * 8 - 1);
228 }
229 # endif
230 blocks[i].c[8] = ((u8 *)key->md.data)[8];
231 blocks[i].c[9] = ((u8 *)key->md.data)[9];
232 blocks[i].c[10] = ((u8 *)key->md.data)[10];
233 /* fix length */
234 blocks[i].c[11] = (u8)(len >> 8);
235 blocks[i].c[12] = (u8)(len);
236
237 memcpy(blocks[i].c + 13, hash_d[i].ptr, 64 - 13);
238 hash_d[i].ptr += 64 - 13;
239 hash_d[i].blocks = (len - (64 - 13)) / 64;
240
241 edges[i].ptr = blocks[i].c;
242 edges[i].blocks = 1;
243 }
244
245 /* hash 13-byte headers and first 64-13 bytes of inputs */
246 sha256_multi_block(ctx, edges, n4x);
247 /* hash bulk inputs */
248 # define MAXCHUNKSIZE 2048
249 # if MAXCHUNKSIZE%64
250 # error "MAXCHUNKSIZE is not divisible by 64"
251 # elif MAXCHUNKSIZE
252 /*
253 * goal is to minimize pressure on L1 cache by moving in shorter steps,
254 * so that hashed data is still in the cache by the time we encrypt it
255 */
256 minblocks = ((frag <= last ? frag : last) - (64 - 13)) / 64;
257 if (minblocks > MAXCHUNKSIZE / 64) {
258 for (i = 0; i < x4; i++) {
259 edges[i].ptr = hash_d[i].ptr;
260 edges[i].blocks = MAXCHUNKSIZE / 64;
261 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
262 }
263 do {
264 sha256_multi_block(ctx, edges, n4x);
265 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
266
267 for (i = 0; i < x4; i++) {
268 edges[i].ptr = hash_d[i].ptr += MAXCHUNKSIZE;
269 hash_d[i].blocks -= MAXCHUNKSIZE / 64;
270 edges[i].blocks = MAXCHUNKSIZE / 64;
271 ciph_d[i].inp += MAXCHUNKSIZE;
272 ciph_d[i].out += MAXCHUNKSIZE;
273 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
274 memcpy(ciph_d[i].iv, ciph_d[i].out - 16, 16);
275 }
276 processed += MAXCHUNKSIZE;
277 minblocks -= MAXCHUNKSIZE / 64;
278 } while (minblocks > MAXCHUNKSIZE / 64);
279 }
280 # endif
281 # undef MAXCHUNKSIZE
282 sha256_multi_block(ctx, hash_d, n4x);
283
284 memset(blocks, 0, sizeof(blocks));
285 for (i = 0; i < x4; i++) {
286 unsigned int len = (i == (x4 - 1) ? last : frag),
287 off = hash_d[i].blocks * 64;
288 const unsigned char *ptr = hash_d[i].ptr + off;
289
290 off = (len - processed) - (64 - 13) - off; /* remainder actually */
291 memcpy(blocks[i].c, ptr, off);
292 blocks[i].c[off] = 0x80;
293 len += 64 + 13; /* 64 is HMAC header */
294 len *= 8; /* convert to bits */
295 if (off < (64 - 8)) {
296 # ifdef BSWAP4
297 blocks[i].d[15] = BSWAP4(len);
298 # else
299 PUTU32(blocks[i].c + 60, len);
300 # endif
301 edges[i].blocks = 1;
302 } else {
303 # ifdef BSWAP4
304 blocks[i].d[31] = BSWAP4(len);
305 # else
306 PUTU32(blocks[i].c + 124, len);
307 # endif
308 edges[i].blocks = 2;
309 }
310 edges[i].ptr = blocks[i].c;
311 }
312
313 /* hash input tails and finalize */
314 sha256_multi_block(ctx, edges, n4x);
315
316 memset(blocks, 0, sizeof(blocks));
317 for (i = 0; i < x4; i++) {
318 # ifdef BSWAP4
319 blocks[i].d[0] = BSWAP4(ctx->A[i]);
320 ctx->A[i] = key->tail.h[0];
321 blocks[i].d[1] = BSWAP4(ctx->B[i]);
322 ctx->B[i] = key->tail.h[1];
323 blocks[i].d[2] = BSWAP4(ctx->C[i]);
324 ctx->C[i] = key->tail.h[2];
325 blocks[i].d[3] = BSWAP4(ctx->D[i]);
326 ctx->D[i] = key->tail.h[3];
327 blocks[i].d[4] = BSWAP4(ctx->E[i]);
328 ctx->E[i] = key->tail.h[4];
329 blocks[i].d[5] = BSWAP4(ctx->F[i]);
330 ctx->F[i] = key->tail.h[5];
331 blocks[i].d[6] = BSWAP4(ctx->G[i]);
332 ctx->G[i] = key->tail.h[6];
333 blocks[i].d[7] = BSWAP4(ctx->H[i]);
334 ctx->H[i] = key->tail.h[7];
335 blocks[i].c[32] = 0x80;
336 blocks[i].d[15] = BSWAP4((64 + 32) * 8);
337 # else
338 PUTU32(blocks[i].c + 0, ctx->A[i]);
339 ctx->A[i] = key->tail.h[0];
340 PUTU32(blocks[i].c + 4, ctx->B[i]);
341 ctx->B[i] = key->tail.h[1];
342 PUTU32(blocks[i].c + 8, ctx->C[i]);
343 ctx->C[i] = key->tail.h[2];
344 PUTU32(blocks[i].c + 12, ctx->D[i]);
345 ctx->D[i] = key->tail.h[3];
346 PUTU32(blocks[i].c + 16, ctx->E[i]);
347 ctx->E[i] = key->tail.h[4];
348 PUTU32(blocks[i].c + 20, ctx->F[i]);
349 ctx->F[i] = key->tail.h[5];
350 PUTU32(blocks[i].c + 24, ctx->G[i]);
351 ctx->G[i] = key->tail.h[6];
352 PUTU32(blocks[i].c + 28, ctx->H[i]);
353 ctx->H[i] = key->tail.h[7];
354 blocks[i].c[32] = 0x80;
355 PUTU32(blocks[i].c + 60, (64 + 32) * 8);
356 # endif
357 edges[i].ptr = blocks[i].c;
358 edges[i].blocks = 1;
359 }
360
361 /* finalize MACs */
362 sha256_multi_block(ctx, edges, n4x);
363
364 for (i = 0; i < x4; i++) {
365 unsigned int len = (i == (x4 - 1) ? last : frag), pad, j;
366 unsigned char *out0 = out;
367
368 memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed);
369 ciph_d[i].inp = ciph_d[i].out;
370
371 out += 5 + 16 + len;
372
373 /* write MAC */
374 PUTU32(out + 0, ctx->A[i]);
375 PUTU32(out + 4, ctx->B[i]);
376 PUTU32(out + 8, ctx->C[i]);
377 PUTU32(out + 12, ctx->D[i]);
378 PUTU32(out + 16, ctx->E[i]);
379 PUTU32(out + 20, ctx->F[i]);
380 PUTU32(out + 24, ctx->G[i]);
381 PUTU32(out + 28, ctx->H[i]);
382 out += 32;
383 len += 32;
384
385 /* pad */
386 pad = 15 - len % 16;
387 for (j = 0; j <= pad; j++)
388 *(out++) = pad;
389 len += pad + 1;
390
391 ciph_d[i].blocks = (len - processed) / 16;
392 len += 16; /* account for explicit iv */
393
394 /* arrange header */
395 out0[0] = ((u8 *)key->md.data)[8];
396 out0[1] = ((u8 *)key->md.data)[9];
397 out0[2] = ((u8 *)key->md.data)[10];
398 out0[3] = (u8)(len >> 8);
399 out0[4] = (u8)(len);
400
401 ret += len + 5;
402 inp += frag;
403 }
404
405 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
406
407 OPENSSL_cleanse(blocks, sizeof(blocks));
408 OPENSSL_cleanse(ctx, sizeof(*ctx));
409
410 return ret;
411 }
412 # endif
413
414 static int aesni_cbc_hmac_sha256_cipher(EVP_CIPHER_CTX *ctx,
415 unsigned char *out,
416 const unsigned char *in, size_t len)
417 {
418 EVP_AES_HMAC_SHA256 *key = data(ctx);
419 unsigned int l;
420 size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
421 * later */
422 sha_off = 0;
423 # if defined(STITCHED_CALL)
424 size_t aes_off = 0, blocks;
425
426 sha_off = SHA256_CBLOCK - key->md.num;
427 # endif
428
429 key->payload_length = NO_PAYLOAD_LENGTH;
430
431 if (len % AES_BLOCK_SIZE)
432 return 0;
433
434 if (EVP_CIPHER_CTX_encrypting(ctx)) {
435 if (plen == NO_PAYLOAD_LENGTH)
436 plen = len;
437 else if (len !=
438 ((plen + SHA256_DIGEST_LENGTH +
439 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
440 return 0;
441 else if (key->aux.tls_ver >= TLS1_1_VERSION)
442 iv = AES_BLOCK_SIZE;
443
444 # if defined(STITCHED_CALL)
445 /*
446 * Assembly stitch handles AVX-capable processors, but its
447 * performance is not optimal on AMD Jaguar, ~40% worse, for
448 * unknown reasons. Incidentally processor in question supports
449 * AVX, but not AMD-specific XOP extension, which can be used
450 * to identify it and avoid stitch invocation. So that after we
451 * establish that current CPU supports AVX, we even see if it's
452 * either even XOP-capable Bulldozer-based or GenuineIntel one.
453 * But SHAEXT-capable go ahead...
454 */
455 if (((OPENSSL_ia32cap_P[2] & (1 << 29)) || /* SHAEXT? */
456 ((OPENSSL_ia32cap_P[1] & (1 << (60 - 32))) && /* AVX? */
457 ((OPENSSL_ia32cap_P[1] & (1 << (43 - 32))) /* XOP? */
458 | (OPENSSL_ia32cap_P[0] & (1 << 30))))) && /* "Intel CPU"? */
459 plen > (sha_off + iv) &&
460 (blocks = (plen - (sha_off + iv)) / SHA256_CBLOCK)) {
461 SHA256_Update(&key->md, in + iv, sha_off);
462
463 (void)aesni_cbc_sha256_enc(in, out, blocks, &key->ks,
464 EVP_CIPHER_CTX_iv_noconst(ctx),
465 &key->md, in + iv + sha_off);
466 blocks *= SHA256_CBLOCK;
467 aes_off += blocks;
468 sha_off += blocks;
469 key->md.Nh += blocks >> 29;
470 key->md.Nl += blocks <<= 3;
471 if (key->md.Nl < (unsigned int)blocks)
472 key->md.Nh++;
473 } else {
474 sha_off = 0;
475 }
476 # endif
477 sha_off += iv;
478 SHA256_Update(&key->md, in + sha_off, plen - sha_off);
479
480 if (plen != len) { /* "TLS" mode of operation */
481 if (in != out)
482 memcpy(out + aes_off, in + aes_off, plen - aes_off);
483
484 /* calculate HMAC and append it to payload */
485 SHA256_Final(out + plen, &key->md);
486 key->md = key->tail;
487 SHA256_Update(&key->md, out + plen, SHA256_DIGEST_LENGTH);
488 SHA256_Final(out + plen, &key->md);
489
490 /* pad the payload|hmac */
491 plen += SHA256_DIGEST_LENGTH;
492 for (l = len - plen - 1; plen < len; plen++)
493 out[plen] = l;
494 /* encrypt HMAC|padding at once */
495 aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
496 &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
497 } else {
498 aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
499 &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
500 }
501 } else {
502 union {
503 unsigned int u[SHA256_DIGEST_LENGTH / sizeof(unsigned int)];
504 unsigned char c[64 + SHA256_DIGEST_LENGTH];
505 } mac, *pmac;
506
507 /* arrange cache line alignment */
508 pmac = (void *)(((size_t)mac.c + 63) & ((size_t)0 - 64));
509
510 /* decrypt HMAC|padding at once */
511 aesni_cbc_encrypt(in, out, len, &key->ks,
512 EVP_CIPHER_CTX_iv_noconst(ctx), 0);
513
514 if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
515 size_t inp_len, mask, j, i;
516 unsigned int res, maxpad, pad, bitlen;
517 int ret = 1;
518 union {
519 unsigned int u[SHA_LBLOCK];
520 unsigned char c[SHA256_CBLOCK];
521 } *data = (void *)key->md.data;
522
523 if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
524 >= TLS1_1_VERSION)
525 iv = AES_BLOCK_SIZE;
526
527 if (len < (iv + SHA256_DIGEST_LENGTH + 1))
528 return 0;
529
530 /* omit explicit iv */
531 out += iv;
532 len -= iv;
533
534 /* figure out payload length */
535 pad = out[len - 1];
536 maxpad = len - (SHA256_DIGEST_LENGTH + 1);
537 maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
538 maxpad &= 255;
539
540 mask = constant_time_ge(maxpad, pad);
541 ret &= mask;
542 /*
543 * If pad is invalid then we will fail the above test but we must
544 * continue anyway because we are in constant time code. However,
545 * we'll use the maxpad value instead of the supplied pad to make
546 * sure we perform well defined pointer arithmetic.
547 */
548 pad = constant_time_select(mask, pad, maxpad);
549
550 inp_len = len - (SHA256_DIGEST_LENGTH + pad + 1);
551
552 key->aux.tls_aad[plen - 2] = inp_len >> 8;
553 key->aux.tls_aad[plen - 1] = inp_len;
554
555 /* calculate HMAC */
556 key->md = key->head;
557 SHA256_Update(&key->md, key->aux.tls_aad, plen);
558
559 # if 1 /* see original reference version in #else */
560 len -= SHA256_DIGEST_LENGTH; /* amend mac */
561 if (len >= (256 + SHA256_CBLOCK)) {
562 j = (len - (256 + SHA256_CBLOCK)) & (0 - SHA256_CBLOCK);
563 j += SHA256_CBLOCK - key->md.num;
564 SHA256_Update(&key->md, out, j);
565 out += j;
566 len -= j;
567 inp_len -= j;
568 }
569
570 /* but pretend as if we hashed padded payload */
571 bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
572 # ifdef BSWAP4
573 bitlen = BSWAP4(bitlen);
574 # else
575 mac.c[0] = 0;
576 mac.c[1] = (unsigned char)(bitlen >> 16);
577 mac.c[2] = (unsigned char)(bitlen >> 8);
578 mac.c[3] = (unsigned char)bitlen;
579 bitlen = mac.u[0];
580 # endif
581
582 pmac->u[0] = 0;
583 pmac->u[1] = 0;
584 pmac->u[2] = 0;
585 pmac->u[3] = 0;
586 pmac->u[4] = 0;
587 pmac->u[5] = 0;
588 pmac->u[6] = 0;
589 pmac->u[7] = 0;
590
591 for (res = key->md.num, j = 0; j < len; j++) {
592 size_t c = out[j];
593 mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
594 c &= mask;
595 c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
596 data->c[res++] = (unsigned char)c;
597
598 if (res != SHA256_CBLOCK)
599 continue;
600
601 /* j is not incremented yet */
602 mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
603 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
604 sha256_block_data_order(&key->md, data, 1);
605 mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
606 pmac->u[0] |= key->md.h[0] & mask;
607 pmac->u[1] |= key->md.h[1] & mask;
608 pmac->u[2] |= key->md.h[2] & mask;
609 pmac->u[3] |= key->md.h[3] & mask;
610 pmac->u[4] |= key->md.h[4] & mask;
611 pmac->u[5] |= key->md.h[5] & mask;
612 pmac->u[6] |= key->md.h[6] & mask;
613 pmac->u[7] |= key->md.h[7] & mask;
614 res = 0;
615 }
616
617 for (i = res; i < SHA256_CBLOCK; i++, j++)
618 data->c[i] = 0;
619
620 if (res > SHA256_CBLOCK - 8) {
621 mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
622 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
623 sha256_block_data_order(&key->md, data, 1);
624 mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
625 pmac->u[0] |= key->md.h[0] & mask;
626 pmac->u[1] |= key->md.h[1] & mask;
627 pmac->u[2] |= key->md.h[2] & mask;
628 pmac->u[3] |= key->md.h[3] & mask;
629 pmac->u[4] |= key->md.h[4] & mask;
630 pmac->u[5] |= key->md.h[5] & mask;
631 pmac->u[6] |= key->md.h[6] & mask;
632 pmac->u[7] |= key->md.h[7] & mask;
633
634 memset(data, 0, SHA256_CBLOCK);
635 j += 64;
636 }
637 data->u[SHA_LBLOCK - 1] = bitlen;
638 sha256_block_data_order(&key->md, data, 1);
639 mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
640 pmac->u[0] |= key->md.h[0] & mask;
641 pmac->u[1] |= key->md.h[1] & mask;
642 pmac->u[2] |= key->md.h[2] & mask;
643 pmac->u[3] |= key->md.h[3] & mask;
644 pmac->u[4] |= key->md.h[4] & mask;
645 pmac->u[5] |= key->md.h[5] & mask;
646 pmac->u[6] |= key->md.h[6] & mask;
647 pmac->u[7] |= key->md.h[7] & mask;
648
649 # ifdef BSWAP4
650 pmac->u[0] = BSWAP4(pmac->u[0]);
651 pmac->u[1] = BSWAP4(pmac->u[1]);
652 pmac->u[2] = BSWAP4(pmac->u[2]);
653 pmac->u[3] = BSWAP4(pmac->u[3]);
654 pmac->u[4] = BSWAP4(pmac->u[4]);
655 pmac->u[5] = BSWAP4(pmac->u[5]);
656 pmac->u[6] = BSWAP4(pmac->u[6]);
657 pmac->u[7] = BSWAP4(pmac->u[7]);
658 # else
659 for (i = 0; i < 8; i++) {
660 res = pmac->u[i];
661 pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
662 pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
663 pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
664 pmac->c[4 * i + 3] = (unsigned char)res;
665 }
666 # endif
667 len += SHA256_DIGEST_LENGTH;
668 # else
669 SHA256_Update(&key->md, out, inp_len);
670 res = key->md.num;
671 SHA256_Final(pmac->c, &key->md);
672
673 {
674 unsigned int inp_blocks, pad_blocks;
675
676 /* but pretend as if we hashed padded payload */
677 inp_blocks =
678 1 + ((SHA256_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
679 res += (unsigned int)(len - inp_len);
680 pad_blocks = res / SHA256_CBLOCK;
681 res %= SHA256_CBLOCK;
682 pad_blocks +=
683 1 + ((SHA256_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
684 for (; inp_blocks < pad_blocks; inp_blocks++)
685 sha1_block_data_order(&key->md, data, 1);
686 }
687 # endif /* pre-lucky-13 reference version of above */
688 key->md = key->tail;
689 SHA256_Update(&key->md, pmac->c, SHA256_DIGEST_LENGTH);
690 SHA256_Final(pmac->c, &key->md);
691
692 /* verify HMAC */
693 out += inp_len;
694 len -= inp_len;
695 # if 1 /* see original reference version in #else */
696 {
697 unsigned char *p =
698 out + len - 1 - maxpad - SHA256_DIGEST_LENGTH;
699 size_t off = out - p;
700 unsigned int c, cmask;
701
702 maxpad += SHA256_DIGEST_LENGTH;
703 for (res = 0, i = 0, j = 0; j < maxpad; j++) {
704 c = p[j];
705 cmask =
706 ((int)(j - off - SHA256_DIGEST_LENGTH)) >>
707 (sizeof(int) * 8 - 1);
708 res |= (c ^ pad) & ~cmask; /* ... and padding */
709 cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
710 res |= (c ^ pmac->c[i]) & cmask;
711 i += 1 & cmask;
712 }
713 maxpad -= SHA256_DIGEST_LENGTH;
714
715 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
716 ret &= (int)~res;
717 }
718 # else /* pre-lucky-13 reference version of above */
719 for (res = 0, i = 0; i < SHA256_DIGEST_LENGTH; i++)
720 res |= out[i] ^ pmac->c[i];
721 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
722 ret &= (int)~res;
723
724 /* verify padding */
725 pad = (pad & ~res) | (maxpad & res);
726 out = out + len - 1 - pad;
727 for (res = 0, i = 0; i < pad; i++)
728 res |= out[i] ^ pad;
729
730 res = (0 - res) >> (sizeof(res) * 8 - 1);
731 ret &= (int)~res;
732 # endif
733 return ret;
734 } else {
735 SHA256_Update(&key->md, out, len);
736 }
737 }
738
739 return 1;
740 }
741
742 static int aesni_cbc_hmac_sha256_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
743 void *ptr)
744 {
745 EVP_AES_HMAC_SHA256 *key = data(ctx);
746 unsigned int u_arg = (unsigned int)arg;
747
748 switch (type) {
749 case EVP_CTRL_AEAD_SET_MAC_KEY:
750 {
751 unsigned int i;
752 unsigned char hmac_key[64];
753
754 memset(hmac_key, 0, sizeof(hmac_key));
755
756 if (arg < 0)
757 return -1;
758
759 if (u_arg > sizeof(hmac_key)) {
760 SHA256_Init(&key->head);
761 SHA256_Update(&key->head, ptr, arg);
762 SHA256_Final(hmac_key, &key->head);
763 } else {
764 memcpy(hmac_key, ptr, arg);
765 }
766
767 for (i = 0; i < sizeof(hmac_key); i++)
768 hmac_key[i] ^= 0x36; /* ipad */
769 SHA256_Init(&key->head);
770 SHA256_Update(&key->head, hmac_key, sizeof(hmac_key));
771
772 for (i = 0; i < sizeof(hmac_key); i++)
773 hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
774 SHA256_Init(&key->tail);
775 SHA256_Update(&key->tail, hmac_key, sizeof(hmac_key));
776
777 OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
778
779 return 1;
780 }
781 case EVP_CTRL_AEAD_TLS1_AAD:
782 {
783 unsigned char *p = ptr;
784 unsigned int len;
785
786 if (arg != EVP_AEAD_TLS1_AAD_LEN)
787 return -1;
788
789 len = p[arg - 2] << 8 | p[arg - 1];
790
791 if (EVP_CIPHER_CTX_encrypting(ctx)) {
792 key->payload_length = len;
793 if ((key->aux.tls_ver =
794 p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
795 if (len < AES_BLOCK_SIZE)
796 return 0;
797 len -= AES_BLOCK_SIZE;
798 p[arg - 2] = len >> 8;
799 p[arg - 1] = len;
800 }
801 key->md = key->head;
802 SHA256_Update(&key->md, p, arg);
803
804 return (int)(((len + SHA256_DIGEST_LENGTH +
805 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
806 - len);
807 } else {
808 memcpy(key->aux.tls_aad, ptr, arg);
809 key->payload_length = arg;
810
811 return SHA256_DIGEST_LENGTH;
812 }
813 }
814 # if !defined(OPENSSL_NO_MULTIBLOCK)
815 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
816 return (int)(5 + 16 + ((arg + 32 + 16) & -16));
817 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
818 {
819 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
820 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
821 unsigned int n4x = 1, x4;
822 unsigned int frag, last, packlen, inp_len;
823
824 if (arg < 0)
825 return -1;
826
827 if (u_arg < sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
828 return -1;
829
830 inp_len = param->inp[11] << 8 | param->inp[12];
831
832 if (EVP_CIPHER_CTX_encrypting(ctx)) {
833 if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION)
834 return -1;
835
836 if (inp_len) {
837 if (inp_len < 4096)
838 return 0; /* too short */
839
840 if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5))
841 n4x = 2; /* AVX2 */
842 } else if ((n4x = param->interleave / 4) && n4x <= 2)
843 inp_len = param->len;
844 else
845 return -1;
846
847 key->md = key->head;
848 SHA256_Update(&key->md, param->inp, 13);
849
850 x4 = 4 * n4x;
851 n4x += 1;
852
853 frag = inp_len >> n4x;
854 last = inp_len + frag - (frag << n4x);
855 if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) {
856 frag++;
857 last -= x4 - 1;
858 }
859
860 packlen = 5 + 16 + ((frag + 32 + 16) & -16);
861 packlen = (packlen << n4x) - packlen;
862 packlen += 5 + 16 + ((last + 32 + 16) & -16);
863
864 param->interleave = x4;
865
866 return (int)packlen;
867 } else
868 return -1; /* not yet */
869 }
870 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
871 {
872 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
873 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
874
875 return (int)tls1_1_multi_block_encrypt(key, param->out,
876 param->inp, param->len,
877 param->interleave / 4);
878 }
879 case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
880 # endif
881 default:
882 return -1;
883 }
884 }
885
886 static EVP_CIPHER aesni_128_cbc_hmac_sha256_cipher = {
887 # ifdef NID_aes_128_cbc_hmac_sha256
888 NID_aes_128_cbc_hmac_sha256,
889 # else
890 NID_undef,
891 # endif
892 AES_BLOCK_SIZE, 16, AES_BLOCK_SIZE,
893 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
894 EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
895 aesni_cbc_hmac_sha256_init_key,
896 aesni_cbc_hmac_sha256_cipher,
897 NULL,
898 sizeof(EVP_AES_HMAC_SHA256),
899 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
900 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
901 aesni_cbc_hmac_sha256_ctrl,
902 NULL
903 };
904
905 static EVP_CIPHER aesni_256_cbc_hmac_sha256_cipher = {
906 # ifdef NID_aes_256_cbc_hmac_sha256
907 NID_aes_256_cbc_hmac_sha256,
908 # else
909 NID_undef,
910 # endif
911 AES_BLOCK_SIZE, 32, AES_BLOCK_SIZE,
912 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
913 EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
914 aesni_cbc_hmac_sha256_init_key,
915 aesni_cbc_hmac_sha256_cipher,
916 NULL,
917 sizeof(EVP_AES_HMAC_SHA256),
918 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
919 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
920 aesni_cbc_hmac_sha256_ctrl,
921 NULL
922 };
923
924 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
925 {
926 return ((OPENSSL_ia32cap_P[1] & AESNI_CAPABLE) &&
927 aesni_cbc_sha256_enc(NULL, NULL, 0, NULL, NULL, NULL, NULL) ?
928 &aesni_128_cbc_hmac_sha256_cipher : NULL);
929 }
930
931 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
932 {
933 return ((OPENSSL_ia32cap_P[1] & AESNI_CAPABLE) &&
934 aesni_cbc_sha256_enc(NULL, NULL, 0, NULL, NULL, NULL, NULL) ?
935 &aesni_256_cbc_hmac_sha256_cipher : NULL);
936 }
937 #else
938 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
939 {
940 return NULL;
941 }
942
943 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
944 {
945 return NULL;
946 }
947 #endif
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