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 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void) 996 { 997 return NULL; 998 } 999 1000 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void) 1001 { 1002 return NULL; 1003 } 1004 # endif 1005 #endif 1006