]> git.ipfire.org Git - thirdparty/openssl.git/blame - crypto/evp/e_aes_cbc_hmac_sha256.c
projects / thirdparty / openssl.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
PROV: add RSA signature implementation
[thirdparty/openssl.git] / crypto / evp / e_aes_cbc_hmac_sha256.c
CommitLineData
aa6bb135
RS		 1/*
2 * Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
8a97a330 3 *
4a8b0c55 4 * Licensed under the Apache License 2.0 (the "License"). You may not use
aa6bb135
RS		 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
8a97a330
AP		 8 */
9
c72fa255
MC		 10/*
11 * AES low level APIs are deprecated for public use, but still ok for internal
12 * use where we're using them to implement the higher level EVP interface, as is
13 * the case here.
14 */
15#include "internal/deprecated.h"
16
8a97a330
AP		 17#include <stdio.h>
18#include <string.h>
459b15d4 19#include <openssl/opensslconf.h>
5158c763
MC		 20#include <openssl/evp.h>
21#include <openssl/objects.h>
22#include <openssl/aes.h>
23#include <openssl/sha.h>
24#include <openssl/rand.h>
24fd8541 25#include "internal/cryptlib.h"
25f2138b 26#include "crypto/modes.h"
706457b7 27#include "internal/constant_time.h"
25f2138b 28#include "crypto/evp.h"
5158c763 29
0f113f3e
MC		 30typedef struct {
31 AES_KEY ks;
32 SHA256_CTX head, tail, md;
33 size_t payload_length; /* AAD length in decrypt case */
8a97a330 34 union {
0f113f3e
MC		 35 unsigned int tls_ver;
36 unsigned char tls_aad[16]; /* 13 used */
8a97a330 37 } aux;
0f113f3e 38} EVP_AES_HMAC_SHA256;
8a97a330 39
0f113f3e 40# define NO_PAYLOAD_LENGTH ((size_t)-1)
8a97a330 41
5158c763 42#if defined(AES_ASM) && ( \
0f113f3e 43 defined(__x86_64) || defined(__x86_64__) || \
b1a07c38 44 defined(_M_AMD64) || defined(_M_X64) )
8a97a330 45
5158c763 46# define AESNI_CAPABLE (1<<(57-32))
8a97a330
AP		 47
48int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
0f113f3e 49 AES_KEY *key);
8a97a330 50int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
0f113f3e 51 AES_KEY *key);
8a97a330
AP		 52
53void aesni_cbc_encrypt(const unsigned char *in,
0f113f3e
MC		 54 unsigned char *out,
55 size_t length,
56 const AES_KEY *key, unsigned char *ivec, int enc);
8a97a330 57
0f113f3e
MC		 58int aesni_cbc_sha256_enc(const void *inp, void *out, size_t blocks,
59 const AES_KEY *key, unsigned char iv[16],
60 SHA256_CTX *ctx, const void *in0);
8a97a330 61
5158c763 62# define data(ctx) ((EVP_AES_HMAC_SHA256 *)EVP_CIPHER_CTX_get_cipher_data(ctx))
8a97a330
AP		 63
64static int aesni_cbc_hmac_sha256_init_key(EVP_CIPHER_CTX *ctx,
0f113f3e
MC		 65 const unsigned char *inkey,
66 const unsigned char *iv, int enc)
67{
68 EVP_AES_HMAC_SHA256 *key = data(ctx);
69 int ret;
8a97a330 70
0f113f3e 71 if (enc)
b88e95f3
KC		 72 ret = aesni_set_encrypt_key(inkey,
73 EVP_CIPHER_CTX_key_length(ctx) * 8,
74 &key->ks);
0f113f3e 75 else
936166af
RL		 76 ret = aesni_set_decrypt_key(inkey,
77 EVP_CIPHER_CTX_key_length(ctx) * 8,
78 &key->ks);
8a97a330 79
0f113f3e
MC		 80 SHA256_Init(&key->head); /* handy when benchmarking */
81 key->tail = key->head;
82 key->md = key->head;
8a97a330 83
0f113f3e 84 key->payload_length = NO_PAYLOAD_LENGTH;
8a97a330 85
0f113f3e
MC		 86 return ret < 0 ? 0 : 1;
87}
8a97a330 88
5158c763 89# define STITCHED_CALL
8a97a330 90
5158c763
MC		 91# if !defined(STITCHED_CALL)
92# define aes_off 0
93# endif
8a97a330 94
0f113f3e 95void sha256_block_data_order(void *c, const void *p, size_t len);
8a97a330 96
0f113f3e
MC		 97static void sha256_update(SHA256_CTX *c, const void *data, size_t len)
98{
99 const unsigned char *ptr = data;
100 size_t res;
101
102 if ((res = c->num)) {
103 res = SHA256_CBLOCK - res;
104 if (len < res)
105 res = len;
106 SHA256_Update(c, ptr, res);
107 ptr += res;
108 len -= res;
109 }
110
111 res = len % SHA256_CBLOCK;
112 len -= res;
113
114 if (len) {
115 sha256_block_data_order(c, ptr, len / SHA256_CBLOCK);
116
117 ptr += len;
118 c->Nh += len >> 29;
119 c->Nl += len <<= 3;
120 if (c->Nl < (unsigned int)len)
121 c->Nh++;
122 }
123
124 if (res)
125 SHA256_Update(c, ptr, res);
8a97a330
AP		 126}
127
5158c763
MC		 128# ifdef SHA256_Update
129# undef SHA256_Update
130# endif
131# define SHA256_Update sha256_update
8a97a330 132
9d6fcd42 133# if !defined(OPENSSL_NO_MULTIBLOCK)
7f893258 134
0f113f3e
MC		 135typedef struct {
136 unsigned int A[8], B[8], C[8], D[8], E[8], F[8], G[8], H[8];
137} SHA256_MB_CTX;
138typedef struct {
139 const unsigned char *ptr;
140 int blocks;
141} HASH_DESC;
7f893258 142
0f113f3e 143void sha256_multi_block(SHA256_MB_CTX *, const HASH_DESC *, int);
7f893258 144
0f113f3e
MC		 145typedef struct {
146 const unsigned char *inp;
147 unsigned char *out;
148 int blocks;
149 u64 iv[2];
150} CIPH_DESC;
7f893258 151
0f113f3e 152void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int);
7f893258 153
a69c0a1b 154static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA256 *key,
0f113f3e
MC		 155 unsigned char *out,
156 const unsigned char *inp,
16cfc2c9 157 size_t inp_len, int n4x)
0f113f3e
MC		 158{ /* n4x is 1 or 2 */
159 HASH_DESC hash_d[8], edges[8];
160 CIPH_DESC ciph_d[8];
161 unsigned char storage[sizeof(SHA256_MB_CTX) + 32];
162 union {
163 u64 q[16];
164 u32 d[32];
165 u8 c[128];
166 } blocks[8];
167 SHA256_MB_CTX *ctx;
168 unsigned int frag, last, packlen, i, x4 = 4 * n4x, minblocks, processed =
169 0;
170 size_t ret = 0;
171 u8 *IVs;
5158c763 172# if defined(BSWAP8)
0f113f3e 173 u64 seqnum;
5158c763 174# endif
0f113f3e
MC		 175
176 /* ask for IVs in bulk */
16cfc2c9 177 if (RAND_bytes((IVs = blocks[0].c), 16 * x4) <= 0)
0f113f3e
MC		 178 return 0;
179
180 /* align */
181 ctx = (SHA256_MB_CTX *) (storage + 32 - ((size_t)storage % 32));
182
183 frag = (unsigned int)inp_len >> (1 + n4x);
184 last = (unsigned int)inp_len + frag - (frag << (1 + n4x));
185 if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) {
186 frag++;
187 last -= x4 - 1;
188 }
189
190 packlen = 5 + 16 + ((frag + 32 + 16) & -16);
191
192 /* populate descriptors with pointers and IVs */
193 hash_d[0].ptr = inp;
194 ciph_d[0].inp = inp;
195 /* 5+16 is place for header and explicit IV */
196 ciph_d[0].out = out + 5 + 16;
197 memcpy(ciph_d[0].out - 16, IVs, 16);
198 memcpy(ciph_d[0].iv, IVs, 16);
199 IVs += 16;
200
201 for (i = 1; i < x4; i++) {
202 ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag;
203 ciph_d[i].out = ciph_d[i - 1].out + packlen;
204 memcpy(ciph_d[i].out - 16, IVs, 16);
205 memcpy(ciph_d[i].iv, IVs, 16);
206 IVs += 16;
207 }
208
5158c763 209# if defined(BSWAP8)
0f113f3e
MC		 210 memcpy(blocks[0].c, key->md.data, 8);
211 seqnum = BSWAP8(blocks[0].q[0]);
5158c763 212# endif
0f113f3e
MC		 213 for (i = 0; i < x4; i++) {
214 unsigned int len = (i == (x4 - 1) ? last : frag);
5158c763 215# if !defined(BSWAP8)
0f113f3e 216 unsigned int carry, j;
5158c763 217# endif
0f113f3e
MC		 218
219 ctx->A[i] = key->md.h[0];
220 ctx->B[i] = key->md.h[1];
221 ctx->C[i] = key->md.h[2];
222 ctx->D[i] = key->md.h[3];
223 ctx->E[i] = key->md.h[4];
224 ctx->F[i] = key->md.h[5];
225 ctx->G[i] = key->md.h[6];
226 ctx->H[i] = key->md.h[7];
227
228 /* fix seqnum */
5158c763 229# if defined(BSWAP8)
0f113f3e 230 blocks[i].q[0] = BSWAP8(seqnum + i);
5158c763 231# else
0f113f3e
MC		 232 for (carry = i, j = 8; j--;) {
233 blocks[i].c[j] = ((u8 *)key->md.data)[j] + carry;
234 carry = (blocks[i].c[j] - carry) >> (sizeof(carry) * 8 - 1);
235 }
5158c763 236# endif
0f113f3e
MC		 237 blocks[i].c[8] = ((u8 *)key->md.data)[8];
238 blocks[i].c[9] = ((u8 *)key->md.data)[9];
239 blocks[i].c[10] = ((u8 *)key->md.data)[10];
240 /* fix length */
241 blocks[i].c[11] = (u8)(len >> 8);
242 blocks[i].c[12] = (u8)(len);
243
244 memcpy(blocks[i].c + 13, hash_d[i].ptr, 64 - 13);
245 hash_d[i].ptr += 64 - 13;
246 hash_d[i].blocks = (len - (64 - 13)) / 64;
247
248 edges[i].ptr = blocks[i].c;
249 edges[i].blocks = 1;
250 }
251
252 /* hash 13-byte headers and first 64-13 bytes of inputs */
253 sha256_multi_block(ctx, edges, n4x);
254 /* hash bulk inputs */
5158c763
MC		 255# define MAXCHUNKSIZE 2048
256# if MAXCHUNKSIZE%64
257# error "MAXCHUNKSIZE is not divisible by 64"
258# elif MAXCHUNKSIZE
0f113f3e
MC		 259 /*
260 * goal is to minimize pressure on L1 cache by moving in shorter steps,
261 * so that hashed data is still in the cache by the time we encrypt it
262 */
263 minblocks = ((frag <= last ? frag : last) - (64 - 13)) / 64;
264 if (minblocks > MAXCHUNKSIZE / 64) {
265 for (i = 0; i < x4; i++) {
266 edges[i].ptr = hash_d[i].ptr;
267 edges[i].blocks = MAXCHUNKSIZE / 64;
268 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
269 }
270 do {
271 sha256_multi_block(ctx, edges, n4x);
272 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
273
274 for (i = 0; i < x4; i++) {
275 edges[i].ptr = hash_d[i].ptr += MAXCHUNKSIZE;
276 hash_d[i].blocks -= MAXCHUNKSIZE / 64;
277 edges[i].blocks = MAXCHUNKSIZE / 64;
278 ciph_d[i].inp += MAXCHUNKSIZE;
279 ciph_d[i].out += MAXCHUNKSIZE;
280 ciph_d[i].blocks = MAXCHUNKSIZE / 16;
281 memcpy(ciph_d[i].iv, ciph_d[i].out - 16, 16);
282 }
283 processed += MAXCHUNKSIZE;
284 minblocks -= MAXCHUNKSIZE / 64;
285 } while (minblocks > MAXCHUNKSIZE / 64);
286 }
5158c763
MC		 287# endif
288# undef MAXCHUNKSIZE
0f113f3e
MC		 289 sha256_multi_block(ctx, hash_d, n4x);
290
291 memset(blocks, 0, sizeof(blocks));
292 for (i = 0; i < x4; i++) {
293 unsigned int len = (i == (x4 - 1) ? last : frag),
294 off = hash_d[i].blocks * 64;
295 const unsigned char *ptr = hash_d[i].ptr + off;
296
297 off = (len - processed) - (64 - 13) - off; /* remainder actually */
298 memcpy(blocks[i].c, ptr, off);
299 blocks[i].c[off] = 0x80;
300 len += 64 + 13; /* 64 is HMAC header */
301 len *= 8; /* convert to bits */
302 if (off < (64 - 8)) {
5158c763 303# ifdef BSWAP4
0f113f3e 304 blocks[i].d[15] = BSWAP4(len);
5158c763 305# else
0f113f3e 306 PUTU32(blocks[i].c + 60, len);
5158c763 307# endif
0f113f3e
MC		 308 edges[i].blocks = 1;
309 } else {
5158c763 310# ifdef BSWAP4
0f113f3e 311 blocks[i].d[31] = BSWAP4(len);
5158c763 312# else
0f113f3e 313 PUTU32(blocks[i].c + 124, len);
5158c763 314# endif
0f113f3e
MC		 315 edges[i].blocks = 2;
316 }
317 edges[i].ptr = blocks[i].c;
318 }
319
320 /* hash input tails and finalize */
321 sha256_multi_block(ctx, edges, n4x);
322
323 memset(blocks, 0, sizeof(blocks));
324 for (i = 0; i < x4; i++) {
5158c763 325# ifdef BSWAP4
0f113f3e
MC		 326 blocks[i].d[0] = BSWAP4(ctx->A[i]);
327 ctx->A[i] = key->tail.h[0];
328 blocks[i].d[1] = BSWAP4(ctx->B[i]);
329 ctx->B[i] = key->tail.h[1];
330 blocks[i].d[2] = BSWAP4(ctx->C[i]);
331 ctx->C[i] = key->tail.h[2];
332 blocks[i].d[3] = BSWAP4(ctx->D[i]);
333 ctx->D[i] = key->tail.h[3];
334 blocks[i].d[4] = BSWAP4(ctx->E[i]);
335 ctx->E[i] = key->tail.h[4];
336 blocks[i].d[5] = BSWAP4(ctx->F[i]);
337 ctx->F[i] = key->tail.h[5];
338 blocks[i].d[6] = BSWAP4(ctx->G[i]);
339 ctx->G[i] = key->tail.h[6];
340 blocks[i].d[7] = BSWAP4(ctx->H[i]);
341 ctx->H[i] = key->tail.h[7];
342 blocks[i].c[32] = 0x80;
343 blocks[i].d[15] = BSWAP4((64 + 32) * 8);
5158c763 344# else
0f113f3e
MC		 345 PUTU32(blocks[i].c + 0, ctx->A[i]);
346 ctx->A[i] = key->tail.h[0];
347 PUTU32(blocks[i].c + 4, ctx->B[i]);
348 ctx->B[i] = key->tail.h[1];
349 PUTU32(blocks[i].c + 8, ctx->C[i]);
350 ctx->C[i] = key->tail.h[2];
351 PUTU32(blocks[i].c + 12, ctx->D[i]);
352 ctx->D[i] = key->tail.h[3];
353 PUTU32(blocks[i].c + 16, ctx->E[i]);
354 ctx->E[i] = key->tail.h[4];
355 PUTU32(blocks[i].c + 20, ctx->F[i]);
356 ctx->F[i] = key->tail.h[5];
357 PUTU32(blocks[i].c + 24, ctx->G[i]);
358 ctx->G[i] = key->tail.h[6];
359 PUTU32(blocks[i].c + 28, ctx->H[i]);
360 ctx->H[i] = key->tail.h[7];
361 blocks[i].c[32] = 0x80;
362 PUTU32(blocks[i].c + 60, (64 + 32) * 8);
5158c763 363# endif
0f113f3e
MC		 364 edges[i].ptr = blocks[i].c;
365 edges[i].blocks = 1;
366 }
367
368 /* finalize MACs */
369 sha256_multi_block(ctx, edges, n4x);
370
371 for (i = 0; i < x4; i++) {
372 unsigned int len = (i == (x4 - 1) ? last : frag), pad, j;
373 unsigned char *out0 = out;
374
375 memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed);
376 ciph_d[i].inp = ciph_d[i].out;
377
378 out += 5 + 16 + len;
379
380 /* write MAC */
381 PUTU32(out + 0, ctx->A[i]);
382 PUTU32(out + 4, ctx->B[i]);
383 PUTU32(out + 8, ctx->C[i]);
384 PUTU32(out + 12, ctx->D[i]);
385 PUTU32(out + 16, ctx->E[i]);
386 PUTU32(out + 20, ctx->F[i]);
387 PUTU32(out + 24, ctx->G[i]);
388 PUTU32(out + 28, ctx->H[i]);
389 out += 32;
390 len += 32;
391
392 /* pad */
393 pad = 15 - len % 16;
394 for (j = 0; j <= pad; j++)
395 *(out++) = pad;
396 len += pad + 1;
397
398 ciph_d[i].blocks = (len - processed) / 16;
399 len += 16; /* account for explicit iv */
400
401 /* arrange header */
402 out0[0] = ((u8 *)key->md.data)[8];
403 out0[1] = ((u8 *)key->md.data)[9];
404 out0[2] = ((u8 *)key->md.data)[10];
405 out0[3] = (u8)(len >> 8);
406 out0[4] = (u8)(len);
407
408 ret += len + 5;
409 inp += frag;
410 }
411
412 aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
413
414 OPENSSL_cleanse(blocks, sizeof(blocks));
415 OPENSSL_cleanse(ctx, sizeof(*ctx));
416
417 return ret;
7f893258 418}
5158c763 419# endif
7f893258 420
0f113f3e
MC		 421static int aesni_cbc_hmac_sha256_cipher(EVP_CIPHER_CTX *ctx,
422 unsigned char *out,
423 const unsigned char *in, size_t len)
424{
425 EVP_AES_HMAC_SHA256 *key = data(ctx);
426 unsigned int l;
427 size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
428 * later */
429 sha_off = 0;
5158c763 430# if defined(STITCHED_CALL)
0f113f3e
MC		 431 size_t aes_off = 0, blocks;
432
433 sha_off = SHA256_CBLOCK - key->md.num;
5158c763 434# endif
0f113f3e
MC		 435
436 key->payload_length = NO_PAYLOAD_LENGTH;
437
438 if (len % AES_BLOCK_SIZE)
439 return 0;
440
936166af 441 if (EVP_CIPHER_CTX_encrypting(ctx)) {
0f113f3e
MC		 442 if (plen == NO_PAYLOAD_LENGTH)
443 plen = len;
444 else if (len !=
445 ((plen + SHA256_DIGEST_LENGTH +
446 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
447 return 0;
448 else if (key->aux.tls_ver >= TLS1_1_VERSION)
449 iv = AES_BLOCK_SIZE;
450
5158c763 451# if defined(STITCHED_CALL)
a5fd24d1
AP		 452 /*
453 * Assembly stitch handles AVX-capable processors, but its
454 * performance is not optimal on AMD Jaguar, ~40% worse, for
455 * unknown reasons. Incidentally processor in question supports
456 * AVX, but not AMD-specific XOP extension, which can be used
457 * to identify it and avoid stitch invocation. So that after we
458 * establish that current CPU supports AVX, we even see if it's
459 * either even XOP-capable Bulldozer-based or GenuineIntel one.
d0f6eb1d 460 * But SHAEXT-capable go ahead...
a5fd24d1 461 */
d0f6eb1d
AP		 462 if (((OPENSSL_ia32cap_P[2] & (1 << 29)) || /* SHAEXT? */
463 ((OPENSSL_ia32cap_P[1] & (1 << (60 - 32))) && /* AVX? */
464 ((OPENSSL_ia32cap_P[1] & (1 << (43 - 32))) /* XOP? */
465 | (OPENSSL_ia32cap_P[0] & (1 << 30))))) && /* "Intel CPU"? */
0f113f3e
MC		 466 plen > (sha_off + iv) &&
467 (blocks = (plen - (sha_off + iv)) / SHA256_CBLOCK)) {
468 SHA256_Update(&key->md, in + iv, sha_off);
469
470 (void)aesni_cbc_sha256_enc(in, out, blocks, &key->ks,
936166af
RL		 471 EVP_CIPHER_CTX_iv_noconst(ctx),
472 &key->md, in + iv + sha_off);
0f113f3e
MC		 473 blocks *= SHA256_CBLOCK;
474 aes_off += blocks;
475 sha_off += blocks;
476 key->md.Nh += blocks >> 29;
477 key->md.Nl += blocks <<= 3;
478 if (key->md.Nl < (unsigned int)blocks)
479 key->md.Nh++;
480 } else {
481 sha_off = 0;
482 }
5158c763 483# endif
0f113f3e
MC		 484 sha_off += iv;
485 SHA256_Update(&key->md, in + sha_off, plen - sha_off);
486
487 if (plen != len) { /* "TLS" mode of operation */
488 if (in != out)
489 memcpy(out + aes_off, in + aes_off, plen - aes_off);
490
491 /* calculate HMAC and append it to payload */
492 SHA256_Final(out + plen, &key->md);
493 key->md = key->tail;
494 SHA256_Update(&key->md, out + plen, SHA256_DIGEST_LENGTH);
495 SHA256_Final(out + plen, &key->md);
496
497 /* pad the payload|hmac */
498 plen += SHA256_DIGEST_LENGTH;
499 for (l = len - plen - 1; plen < len; plen++)
500 out[plen] = l;
501 /* encrypt HMAC|padding at once */
502 aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
936166af 503 &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
0f113f3e
MC		 504 } else {
505 aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
936166af 506 &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
0f113f3e
MC		 507 }
508 } else {
509 union {
510 unsigned int u[SHA256_DIGEST_LENGTH / sizeof(unsigned int)];
511 unsigned char c[64 + SHA256_DIGEST_LENGTH];
512 } mac, *pmac;
513
514 /* arrange cache line alignment */
515 pmac = (void *)(((size_t)mac.c + 63) & ((size_t)0 - 64));
516
517 /* decrypt HMAC|padding at once */
936166af
RL		 518 aesni_cbc_encrypt(in, out, len, &key->ks,
519 EVP_CIPHER_CTX_iv_noconst(ctx), 0);
0f113f3e
MC		 520
521 if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
522 size_t inp_len, mask, j, i;
523 unsigned int res, maxpad, pad, bitlen;
524 int ret = 1;
525 union {
526 unsigned int u[SHA_LBLOCK];
527 unsigned char c[SHA256_CBLOCK];
528 } *data = (void *)key->md.data;
529
530 if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
531 >= TLS1_1_VERSION)
532 iv = AES_BLOCK_SIZE;
533
534 if (len < (iv + SHA256_DIGEST_LENGTH + 1))
535 return 0;
536
537 /* omit explicit iv */
538 out += iv;
539 len -= iv;
540
541 /* figure out payload length */
542 pad = out[len - 1];
543 maxpad = len - (SHA256_DIGEST_LENGTH + 1);
544 maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
545 maxpad &= 255;
546
335d0a46
MC		 547 mask = constant_time_ge(maxpad, pad);
548 ret &= mask;
549 /*
550 * If pad is invalid then we will fail the above test but we must
551 * continue anyway because we are in constant time code. However,
552 * we'll use the maxpad value instead of the supplied pad to make
553 * sure we perform well defined pointer arithmetic.
554 */
555 pad = constant_time_select(mask, pad, maxpad);
70428ead 556
0f113f3e 557 inp_len = len - (SHA256_DIGEST_LENGTH + pad + 1);
0f113f3e
MC		 558
559 key->aux.tls_aad[plen - 2] = inp_len >> 8;
560 key->aux.tls_aad[plen - 1] = inp_len;
561
562 /* calculate HMAC */
563 key->md = key->head;
564 SHA256_Update(&key->md, key->aux.tls_aad, plen);
565
5908555c 566# if 1 /* see original reference version in #else */
0f113f3e
MC		 567 len -= SHA256_DIGEST_LENGTH; /* amend mac */
568 if (len >= (256 + SHA256_CBLOCK)) {
569 j = (len - (256 + SHA256_CBLOCK)) & (0 - SHA256_CBLOCK);
570 j += SHA256_CBLOCK - key->md.num;
571 SHA256_Update(&key->md, out, j);
572 out += j;
573 len -= j;
574 inp_len -= j;
575 }
576
577 /* but pretend as if we hashed padded payload */
578 bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
5158c763 579# ifdef BSWAP4
0f113f3e 580 bitlen = BSWAP4(bitlen);
5158c763 581# else
0f113f3e
MC		 582 mac.c[0] = 0;
583 mac.c[1] = (unsigned char)(bitlen >> 16);
584 mac.c[2] = (unsigned char)(bitlen >> 8);
585 mac.c[3] = (unsigned char)bitlen;
586 bitlen = mac.u[0];
5158c763 587# endif
0f113f3e
MC		 588
589 pmac->u[0] = 0;
590 pmac->u[1] = 0;
591 pmac->u[2] = 0;
592 pmac->u[3] = 0;
593 pmac->u[4] = 0;
594 pmac->u[5] = 0;
595 pmac->u[6] = 0;
596 pmac->u[7] = 0;
597
598 for (res = key->md.num, j = 0; j < len; j++) {
599 size_t c = out[j];
600 mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
601 c &= mask;
602 c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
603 data->c[res++] = (unsigned char)c;
604
605 if (res != SHA256_CBLOCK)
606 continue;
607
608 /* j is not incremented yet */
609 mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
610 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
611 sha256_block_data_order(&key->md, data, 1);
612 mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
613 pmac->u[0] |= key->md.h[0] & mask;
614 pmac->u[1] |= key->md.h[1] & mask;
615 pmac->u[2] |= key->md.h[2] & mask;
616 pmac->u[3] |= key->md.h[3] & mask;
617 pmac->u[4] |= key->md.h[4] & mask;
618 pmac->u[5] |= key->md.h[5] & mask;
619 pmac->u[6] |= key->md.h[6] & mask;
620 pmac->u[7] |= key->md.h[7] & mask;
621 res = 0;
622 }
623
624 for (i = res; i < SHA256_CBLOCK; i++, j++)
625 data->c[i] = 0;
626
627 if (res > SHA256_CBLOCK - 8) {
628 mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
629 data->u[SHA_LBLOCK - 1] |= bitlen & mask;
630 sha256_block_data_order(&key->md, data, 1);
631 mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
632 pmac->u[0] |= key->md.h[0] & mask;
633 pmac->u[1] |= key->md.h[1] & mask;
634 pmac->u[2] |= key->md.h[2] & mask;
635 pmac->u[3] |= key->md.h[3] & mask;
636 pmac->u[4] |= key->md.h[4] & mask;
637 pmac->u[5] |= key->md.h[5] & mask;
638 pmac->u[6] |= key->md.h[6] & mask;
639 pmac->u[7] |= key->md.h[7] & mask;
640
641 memset(data, 0, SHA256_CBLOCK);
642 j += 64;
643 }
644 data->u[SHA_LBLOCK - 1] = bitlen;
645 sha256_block_data_order(&key->md, data, 1);
646 mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
647 pmac->u[0] |= key->md.h[0] & mask;
648 pmac->u[1] |= key->md.h[1] & mask;
649 pmac->u[2] |= key->md.h[2] & mask;
650 pmac->u[3] |= key->md.h[3] & mask;
651 pmac->u[4] |= key->md.h[4] & mask;
652 pmac->u[5] |= key->md.h[5] & mask;
653 pmac->u[6] |= key->md.h[6] & mask;
654 pmac->u[7] |= key->md.h[7] & mask;
655
5158c763 656# ifdef BSWAP4
0f113f3e
MC		 657 pmac->u[0] = BSWAP4(pmac->u[0]);
658 pmac->u[1] = BSWAP4(pmac->u[1]);
659 pmac->u[2] = BSWAP4(pmac->u[2]);
660 pmac->u[3] = BSWAP4(pmac->u[3]);
661 pmac->u[4] = BSWAP4(pmac->u[4]);
662 pmac->u[5] = BSWAP4(pmac->u[5]);
663 pmac->u[6] = BSWAP4(pmac->u[6]);
664 pmac->u[7] = BSWAP4(pmac->u[7]);
5158c763 665# else
0f113f3e
MC		 666 for (i = 0; i < 8; i++) {
667 res = pmac->u[i];
668 pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
669 pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
670 pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
671 pmac->c[4 * i + 3] = (unsigned char)res;
672 }
5158c763 673# endif
0f113f3e 674 len += SHA256_DIGEST_LENGTH;
5158c763 675# else
0f113f3e
MC		 676 SHA256_Update(&key->md, out, inp_len);
677 res = key->md.num;
678 SHA256_Final(pmac->c, &key->md);
679
680 {
681 unsigned int inp_blocks, pad_blocks;
682
683 /* but pretend as if we hashed padded payload */
684 inp_blocks =
685 1 + ((SHA256_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
686 res += (unsigned int)(len - inp_len);
687 pad_blocks = res / SHA256_CBLOCK;
688 res %= SHA256_CBLOCK;
689 pad_blocks +=
690 1 + ((SHA256_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
691 for (; inp_blocks < pad_blocks; inp_blocks++)
692 sha1_block_data_order(&key->md, data, 1);
693 }
5908555c 694# endif /* pre-lucky-13 reference version of above */
0f113f3e
MC		 695 key->md = key->tail;
696 SHA256_Update(&key->md, pmac->c, SHA256_DIGEST_LENGTH);
697 SHA256_Final(pmac->c, &key->md);
698
699 /* verify HMAC */
700 out += inp_len;
701 len -= inp_len;
5908555c 702# if 1 /* see original reference version in #else */
0f113f3e
MC		 703 {
704 unsigned char *p =
705 out + len - 1 - maxpad - SHA256_DIGEST_LENGTH;
706 size_t off = out - p;
707 unsigned int c, cmask;
708
709 maxpad += SHA256_DIGEST_LENGTH;
710 for (res = 0, i = 0, j = 0; j < maxpad; j++) {
711 c = p[j];
712 cmask =
713 ((int)(j - off - SHA256_DIGEST_LENGTH)) >>
714 (sizeof(int) * 8 - 1);
715 res |= (c ^ pad) & ~cmask; /* ... and padding */
716 cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
717 res |= (c ^ pmac->c[i]) & cmask;
718 i += 1 & cmask;
719 }
720 maxpad -= SHA256_DIGEST_LENGTH;
721
722 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
723 ret &= (int)~res;
724 }
5908555c 725# else /* pre-lucky-13 reference version of above */
0f113f3e
MC		 726 for (res = 0, i = 0; i < SHA256_DIGEST_LENGTH; i++)
727 res |= out[i] ^ pmac->c[i];
728 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
729 ret &= (int)~res;
730
731 /* verify padding */
732 pad = (pad & ~res) | (maxpad & res);
733 out = out + len - 1 - pad;
734 for (res = 0, i = 0; i < pad; i++)
735 res |= out[i] ^ pad;
736
737 res = (0 - res) >> (sizeof(res) * 8 - 1);
738 ret &= (int)~res;
5158c763 739# endif
0f113f3e
MC		 740 return ret;
741 } else {
742 SHA256_Update(&key->md, out, len);
743 }
744 }
745
746 return 1;
747}
8a97a330 748
0f113f3e
MC		 749static int aesni_cbc_hmac_sha256_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
750 void *ptr)
751{
752 EVP_AES_HMAC_SHA256 *key = data(ctx);
753 unsigned int u_arg = (unsigned int)arg;
754
755 switch (type) {
756 case EVP_CTRL_AEAD_SET_MAC_KEY:
757 {
758 unsigned int i;
759 unsigned char hmac_key[64];
760
761 memset(hmac_key, 0, sizeof(hmac_key));
762
763 if (arg < 0)
764 return -1;
765
766 if (u_arg > sizeof(hmac_key)) {
767 SHA256_Init(&key->head);
768 SHA256_Update(&key->head, ptr, arg);
769 SHA256_Final(hmac_key, &key->head);
770 } else {
771 memcpy(hmac_key, ptr, arg);
772 }
773
774 for (i = 0; i < sizeof(hmac_key); i++)
775 hmac_key[i] ^= 0x36; /* ipad */
776 SHA256_Init(&key->head);
777 SHA256_Update(&key->head, hmac_key, sizeof(hmac_key));
778
779 for (i = 0; i < sizeof(hmac_key); i++)
780 hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
781 SHA256_Init(&key->tail);
782 SHA256_Update(&key->tail, hmac_key, sizeof(hmac_key));
783
784 OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
785
786 return 1;
787 }
788 case EVP_CTRL_AEAD_TLS1_AAD:
789 {
790 unsigned char *p = ptr;
1b6f5a4d 791 unsigned int len;
0f113f3e 792
c8269881
MC		 793 if (arg != EVP_AEAD_TLS1_AAD_LEN)
794 return -1;
795
1b6f5a4d
BE		 796 len = p[arg - 2] << 8 | p[arg - 1];
797
936166af 798 if (EVP_CIPHER_CTX_encrypting(ctx)) {
0f113f3e
MC		 799 key->payload_length = len;
800 if ((key->aux.tls_ver =
801 p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
a68d3505
RS		 802 if (len < AES_BLOCK_SIZE)
803 return 0;
0f113f3e
MC		 804 len -= AES_BLOCK_SIZE;
805 p[arg - 2] = len >> 8;
806 p[arg - 1] = len;
807 }
808 key->md = key->head;
809 SHA256_Update(&key->md, p, arg);
810
811 return (int)(((len + SHA256_DIGEST_LENGTH +
812 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
813 - len);
814 } else {
0f113f3e
MC		 815 memcpy(key->aux.tls_aad, ptr, arg);
816 key->payload_length = arg;
817
818 return SHA256_DIGEST_LENGTH;
819 }
820 }
9d6fcd42 821# if !defined(OPENSSL_NO_MULTIBLOCK)
0f113f3e
MC		 822 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
823 return (int)(5 + 16 + ((arg + 32 + 16) & -16));
824 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
825 {
826 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
827 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
828 unsigned int n4x = 1, x4;
829 unsigned int frag, last, packlen, inp_len;
830
831 if (arg < 0)
832 return -1;
833
834 if (u_arg < sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
835 return -1;
836
837 inp_len = param->inp[11] << 8 | param->inp[12];
838
936166af 839 if (EVP_CIPHER_CTX_encrypting(ctx)) {
0f113f3e
MC		 840 if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION)
841 return -1;
842
843 if (inp_len) {
844 if (inp_len < 4096)
845 return 0; /* too short */
846
847 if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5))
848 n4x = 2; /* AVX2 */
849 } else if ((n4x = param->interleave / 4) && n4x <= 2)
850 inp_len = param->len;
851 else
852 return -1;
853
854 key->md = key->head;
855 SHA256_Update(&key->md, param->inp, 13);
856
857 x4 = 4 * n4x;
858 n4x += 1;
859
860 frag = inp_len >> n4x;
861 last = inp_len + frag - (frag << n4x);
862 if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) {
863 frag++;
864 last -= x4 - 1;
865 }
866
867 packlen = 5 + 16 + ((frag + 32 + 16) & -16);
868 packlen = (packlen << n4x) - packlen;
869 packlen += 5 + 16 + ((last + 32 + 16) & -16);
870
871 param->interleave = x4;
872
873 return (int)packlen;
874 } else
875 return -1; /* not yet */
876 }
877 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
878 {
879 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
880 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
881
882 return (int)tls1_1_multi_block_encrypt(key, param->out,
883 param->inp, param->len,
16cfc2c9 884 param->interleave / 4);
0f113f3e
MC		 885 }
886 case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
5158c763 887# endif
0f113f3e
MC		 888 default:
889 return -1;
890 }
891}
8a97a330 892
0f113f3e 893static EVP_CIPHER aesni_128_cbc_hmac_sha256_cipher = {
5158c763 894# ifdef NID_aes_128_cbc_hmac_sha256
0f113f3e 895 NID_aes_128_cbc_hmac_sha256,
5158c763 896# else
0f113f3e 897 NID_undef,
5158c763 898# endif
936166af 899 AES_BLOCK_SIZE, 16, AES_BLOCK_SIZE,
0f113f3e
MC		 900 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
901 EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
902 aesni_cbc_hmac_sha256_init_key,
903 aesni_cbc_hmac_sha256_cipher,
904 NULL,
905 sizeof(EVP_AES_HMAC_SHA256),
906 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
907 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
908 aesni_cbc_hmac_sha256_ctrl,
909 NULL
910};
911
912static EVP_CIPHER aesni_256_cbc_hmac_sha256_cipher = {
5158c763 913# ifdef NID_aes_256_cbc_hmac_sha256
0f113f3e 914 NID_aes_256_cbc_hmac_sha256,
5158c763 915# else
0f113f3e 916 NID_undef,
5158c763 917# endif
936166af 918 AES_BLOCK_SIZE, 32, AES_BLOCK_SIZE,
0f113f3e
MC		 919 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
920 EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
921 aesni_cbc_hmac_sha256_init_key,
922 aesni_cbc_hmac_sha256_cipher,
923 NULL,
924 sizeof(EVP_AES_HMAC_SHA256),
925 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
926 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
927 aesni_cbc_hmac_sha256_ctrl,
928 NULL
929};
8a97a330
AP		 930
931const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
0f113f3e
MC		 932{
933 return ((OPENSSL_ia32cap_P[1] & AESNI_CAPABLE) &&
934 aesni_cbc_sha256_enc(NULL, NULL, 0, NULL, NULL, NULL, NULL) ?
935 &aesni_128_cbc_hmac_sha256_cipher : NULL);
936}
8a97a330
AP		 937
938const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
0f113f3e
MC		 939{
940 return ((OPENSSL_ia32cap_P[1] & AESNI_CAPABLE) &&
941 aesni_cbc_sha256_enc(NULL, NULL, 0, NULL, NULL, NULL, NULL) ?
942 &aesni_256_cbc_hmac_sha256_cipher : NULL);
943}
5158c763 944#else
8a97a330 945const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
0f113f3e
MC		 946{
947 return NULL;
948}
949
8a97a330 950const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
0f113f3e
MC		 951{
952 return NULL;
953}
8a97a330 954#endif
A mirror of the official openssl repository