1/* 2 * Copyright 2011-2021 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/* 11 * All 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 17#include "cipher_aes_cbc_hmac_sha.h" 18 19#if !defined(AES_CBC_HMAC_SHA_CAPABLE) || !defined(AESNI_CAPABLE) 20int ossl_cipher_capable_aes_cbc_hmac_sha1(void) 21{ 22 return 0; 23} 24 25const PROV_CIPHER_HW_AES_HMAC_SHA *ossl_prov_cipher_hw_aes_cbc_hmac_sha1(void) 26{ 27 return NULL; 28} 29#else 30 31# include <openssl/rand.h> 32# include "crypto/evp.h" 33# include "internal/constant_time.h" 34 35void sha1_block_data_order(void *c, const void *p, size_t len); 36void aesni_cbc_sha1_enc(const void *inp, void *out, size_t blocks, 37 const AES_KEY *key, unsigned char iv[16], 38 SHA_CTX *ctx, const void *in0); 39 40int ossl_cipher_capable_aes_cbc_hmac_sha1(void) 41{ 42 return AESNI_CBC_HMAC_SHA_CAPABLE; 43} 44 45static int aesni_cbc_hmac_sha1_init_key(PROV_CIPHER_CTX *vctx, 46 const unsigned char *key, size_t keylen) 47{ 48 int ret; 49 PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx; 50 PROV_AES_HMAC_SHA1_CTX *sctx = (PROV_AES_HMAC_SHA1_CTX *)vctx; 51 52 if (ctx->base.enc) 53 ret = aesni_set_encrypt_key(key, keylen * 8, &ctx->ks); 54 else 55 ret = aesni_set_decrypt_key(key, keylen * 8, &ctx->ks); 56 57 SHA1_Init(&sctx->head); /* handy when benchmarking */ 58 sctx->tail = sctx->head; 59 sctx->md = sctx->head; 60 61 ctx->payload_length = NO_PAYLOAD_LENGTH; 62 63 vctx->removetlspad = 1; 64 vctx->removetlsfixed = SHA_DIGEST_LENGTH + AES_BLOCK_SIZE; 65 66 return ret < 0 ? 0 : 1; 67} 68 69static void sha1_update(SHA_CTX *c, const void *data, size_t len) 70{ 71 const unsigned char *ptr = data; 72 size_t res; 73 74 if ((res = c->num)) { 75 res = SHA_CBLOCK - res; 76 if (len < res) 77 res = len; 78 SHA1_Update(c, ptr, res); 79 ptr += res; 80 len -= res; 81 } 82 83 res = len % SHA_CBLOCK; 84 len -= res; 85 86 if (len) { 87 sha1_block_data_order(c, ptr, len / SHA_CBLOCK); 88 89 ptr += len; 90 c->Nh += len >> 29; 91 c->Nl += len <<= 3; 92 if (c->Nl < (unsigned int)len) 93 c->Nh++; 94 } 95 96 if (res) 97 SHA1_Update(c, ptr, res); 98} 99 100# if !defined(OPENSSL_NO_MULTIBLOCK) 101 102typedef struct { 103 unsigned int A[8], B[8], C[8], D[8], E[8]; 104} SHA1_MB_CTX; 105 106typedef struct { 107 const unsigned char *ptr; 108 int blocks; 109} HASH_DESC; 110 111typedef struct { 112 const unsigned char *inp; 113 unsigned char *out; 114 int blocks; 115 u64 iv[2]; 116} CIPH_DESC; 117 118void sha1_multi_block(SHA1_MB_CTX *, const HASH_DESC *, int); 119void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int); 120 121static size_t tls1_multi_block_encrypt(void *vctx, 122 unsigned char *out, 123 const unsigned char *inp, 124 size_t inp_len, int n4x) 125{ /* n4x is 1 or 2 */ 126 PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx; 127 PROV_AES_HMAC_SHA1_CTX *sctx = (PROV_AES_HMAC_SHA1_CTX *)vctx; 128 HASH_DESC hash_d[8], edges[8]; 129 CIPH_DESC ciph_d[8]; 130 unsigned char storage[sizeof(SHA1_MB_CTX) + 32]; 131 union { 132 u64 q[16]; 133 u32 d[32]; 134 u8 c[128]; 135 } blocks[8]; 136 SHA1_MB_CTX *mctx; 137 unsigned int frag, last, packlen, i; 138 unsigned int x4 = 4 * n4x, minblocks, processed = 0; 139 size_t ret = 0; 140 u8 *IVs; 141# if defined(BSWAP8) 142 u64 seqnum; 143# endif 144 145 /* ask for IVs in bulk */ 146 if (RAND_bytes_ex(ctx->base.libctx, (IVs = blocks[0].c), 16 * x4, 0) <= 0) 147 return 0; 148 149 mctx = (SHA1_MB_CTX *) (storage + 32 - ((size_t)storage % 32)); /* align */ 150 151 frag = (unsigned int)inp_len >> (1 + n4x); 152 last = (unsigned int)inp_len + frag - (frag << (1 + n4x)); 153 if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) { 154 frag++; 155 last -= x4 - 1; 156 } 157 158 packlen = 5 + 16 + ((frag + 20 + 16) & -16); 159 160 /* populate descriptors with pointers and IVs */ 161 hash_d[0].ptr = inp; 162 ciph_d[0].inp = inp; 163 /* 5+16 is place for header and explicit IV */ 164 ciph_d[0].out = out + 5 + 16; 165 memcpy(ciph_d[0].out - 16, IVs, 16); 166 memcpy(ciph_d[0].iv, IVs, 16); 167 IVs += 16; 168 169 for (i = 1; i < x4; i++) { 170 ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag; 171 ciph_d[i].out = ciph_d[i - 1].out + packlen; 172 memcpy(ciph_d[i].out - 16, IVs, 16); 173 memcpy(ciph_d[i].iv, IVs, 16); 174 IVs += 16; 175 } 176 177# if defined(BSWAP8) 178 memcpy(blocks[0].c, sctx->md.data, 8); 179 seqnum = BSWAP8(blocks[0].q[0]); 180# endif 181 for (i = 0; i < x4; i++) { 182 unsigned int len = (i == (x4 - 1) ? last : frag); 183# if !defined(BSWAP8) 184 unsigned int carry, j; 185# endif 186 187 mctx->A[i] = sctx->md.h0; 188 mctx->B[i] = sctx->md.h1; 189 mctx->C[i] = sctx->md.h2; 190 mctx->D[i] = sctx->md.h3; 191 mctx->E[i] = sctx->md.h4; 192 193 /* fix seqnum */ 194# if defined(BSWAP8) 195 blocks[i].q[0] = BSWAP8(seqnum + i); 196# else 197 for (carry = i, j = 8; j--;) { 198 blocks[i].c[j] = ((u8 *)sctx->md.data)[j] + carry; 199 carry = (blocks[i].c[j] - carry) >> (sizeof(carry) * 8 - 1); 200 } 201# endif 202 blocks[i].c[8] = ((u8 *)sctx->md.data)[8]; 203 blocks[i].c[9] = ((u8 *)sctx->md.data)[9]; 204 blocks[i].c[10] = ((u8 *)sctx->md.data)[10]; 205 /* fix length */ 206 blocks[i].c[11] = (u8)(len >> 8); 207 blocks[i].c[12] = (u8)(len); 208 209 memcpy(blocks[i].c + 13, hash_d[i].ptr, 64 - 13); 210 hash_d[i].ptr += 64 - 13; 211 hash_d[i].blocks = (len - (64 - 13)) / 64; 212 213 edges[i].ptr = blocks[i].c; 214 edges[i].blocks = 1; 215 } 216 217 /* hash 13-byte headers and first 64-13 bytes of inputs */ 218 sha1_multi_block(mctx, edges, n4x); 219 /* hash bulk inputs */ 220# define MAXCHUNKSIZE 2048 221# if MAXCHUNKSIZE%64 222# error "MAXCHUNKSIZE is not divisible by 64" 223# elif MAXCHUNKSIZE 224 /* 225 * goal is to minimize pressure on L1 cache by moving in shorter steps, 226 * so that hashed data is still in the cache by the time we encrypt it 227 */ 228 minblocks = ((frag <= last ? frag : last) - (64 - 13)) / 64; 229 if (minblocks > MAXCHUNKSIZE / 64) { 230 for (i = 0; i < x4; i++) { 231 edges[i].ptr = hash_d[i].ptr; 232 edges[i].blocks = MAXCHUNKSIZE / 64; 233 ciph_d[i].blocks = MAXCHUNKSIZE / 16; 234 } 235 do { 236 sha1_multi_block(mctx, edges, n4x); 237 aesni_multi_cbc_encrypt(ciph_d, &ctx->ks, n4x); 238 239 for (i = 0; i < x4; i++) { 240 edges[i].ptr = hash_d[i].ptr += MAXCHUNKSIZE; 241 hash_d[i].blocks -= MAXCHUNKSIZE / 64; 242 edges[i].blocks = MAXCHUNKSIZE / 64; 243 ciph_d[i].inp += MAXCHUNKSIZE; 244 ciph_d[i].out += MAXCHUNKSIZE; 245 ciph_d[i].blocks = MAXCHUNKSIZE / 16; 246 memcpy(ciph_d[i].iv, ciph_d[i].out - 16, 16); 247 } 248 processed += MAXCHUNKSIZE; 249 minblocks -= MAXCHUNKSIZE / 64; 250 } while (minblocks > MAXCHUNKSIZE / 64); 251 } 252# endif 253# undef MAXCHUNKSIZE 254 sha1_multi_block(mctx, hash_d, n4x); 255 256 memset(blocks, 0, sizeof(blocks)); 257 for (i = 0; i < x4; i++) { 258 unsigned int len = (i == (x4 - 1) ? last : frag), 259 off = hash_d[i].blocks * 64; 260 const unsigned char *ptr = hash_d[i].ptr + off; 261 262 off = (len - processed) - (64 - 13) - off; /* remainder actually */ 263 memcpy(blocks[i].c, ptr, off); 264 blocks[i].c[off] = 0x80; 265 len += 64 + 13; /* 64 is HMAC header */ 266 len *= 8; /* convert to bits */ 267 if (off < (64 - 8)) { 268# ifdef BSWAP4 269 blocks[i].d[15] = BSWAP4(len); 270# else 271 PUTU32(blocks[i].c + 60, len); 272# endif 273 edges[i].blocks = 1; 274 } else { 275# ifdef BSWAP4 276 blocks[i].d[31] = BSWAP4(len); 277# else 278 PUTU32(blocks[i].c + 124, len); 279# endif 280 edges[i].blocks = 2; 281 } 282 edges[i].ptr = blocks[i].c; 283 } 284 285 /* hash input tails and finalize */ 286 sha1_multi_block(mctx, edges, n4x); 287 288 memset(blocks, 0, sizeof(blocks)); 289 for (i = 0; i < x4; i++) { 290# ifdef BSWAP4 291 blocks[i].d[0] = BSWAP4(mctx->A[i]); 292 mctx->A[i] = sctx->tail.h0; 293 blocks[i].d[1] = BSWAP4(mctx->B[i]); 294 mctx->B[i] = sctx->tail.h1; 295 blocks[i].d[2] = BSWAP4(mctx->C[i]); 296 mctx->C[i] = sctx->tail.h2; 297 blocks[i].d[3] = BSWAP4(mctx->D[i]); 298 mctx->D[i] = sctx->tail.h3; 299 blocks[i].d[4] = BSWAP4(mctx->E[i]); 300 mctx->E[i] = sctx->tail.h4; 301 blocks[i].c[20] = 0x80; 302 blocks[i].d[15] = BSWAP4((64 + 20) * 8); 303# else 304 PUTU32(blocks[i].c + 0, mctx->A[i]); 305 mctx->A[i] = sctx->tail.h0; 306 PUTU32(blocks[i].c + 4, mctx->B[i]); 307 mctx->B[i] = sctx->tail.h1; 308 PUTU32(blocks[i].c + 8, mctx->C[i]); 309 mctx->C[i] = sctx->tail.h2; 310 PUTU32(blocks[i].c + 12, mctx->D[i]); 311 mctx->D[i] = sctx->tail.h3; 312 PUTU32(blocks[i].c + 16, mctx->E[i]); 313 mctx->E[i] = sctx->tail.h4; 314 blocks[i].c[20] = 0x80; 315 PUTU32(blocks[i].c + 60, (64 + 20) * 8); 316# endif /* BSWAP */ 317 edges[i].ptr = blocks[i].c; 318 edges[i].blocks = 1; 319 } 320 321 /* finalize MACs */ 322 sha1_multi_block(mctx, edges, n4x); 323 324 for (i = 0; i < x4; i++) { 325 unsigned int len = (i == (x4 - 1) ? last : frag), pad, j; 326 unsigned char *out0 = out; 327 328 memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed); 329 ciph_d[i].inp = ciph_d[i].out; 330 331 out += 5 + 16 + len; 332 333 /* write MAC */ 334 PUTU32(out + 0, mctx->A[i]); 335 PUTU32(out + 4, mctx->B[i]); 336 PUTU32(out + 8, mctx->C[i]); 337 PUTU32(out + 12, mctx->D[i]); 338 PUTU32(out + 16, mctx->E[i]); 339 out += 20; 340 len += 20; 341 342 /* pad */ 343 pad = 15 - len % 16; 344 for (j = 0; j <= pad; j++) 345 *(out++) = pad; 346 len += pad + 1; 347 348 ciph_d[i].blocks = (len - processed) / 16; 349 len += 16; /* account for explicit iv */ 350 351 /* arrange header */ 352 out0[0] = ((u8 *)sctx->md.data)[8]; 353 out0[1] = ((u8 *)sctx->md.data)[9]; 354 out0[2] = ((u8 *)sctx->md.data)[10]; 355 out0[3] = (u8)(len >> 8); 356 out0[4] = (u8)(len); 357 358 ret += len + 5; 359 inp += frag; 360 } 361 362 aesni_multi_cbc_encrypt(ciph_d, &ctx->ks, n4x); 363 364 OPENSSL_cleanse(blocks, sizeof(blocks)); 365 OPENSSL_cleanse(mctx, sizeof(*mctx)); 366 367 ctx->multiblock_encrypt_len = ret; 368 return ret; 369} 370# endif /* OPENSSL_NO_MULTIBLOCK */ 371 372static int aesni_cbc_hmac_sha1_cipher(PROV_CIPHER_CTX *vctx, 373 unsigned char *out, 374 const unsigned char *in, size_t len) 375{ 376 PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx; 377 PROV_AES_HMAC_SHA1_CTX *sctx = (PROV_AES_HMAC_SHA1_CTX *)vctx; 378 unsigned int l; 379 size_t plen = ctx->payload_length; 380 size_t iv = 0; /* explicit IV in TLS 1.1 and later */ 381 size_t aes_off = 0, blocks; 382 size_t sha_off = SHA_CBLOCK - sctx->md.num; 383 384 ctx->payload_length = NO_PAYLOAD_LENGTH; 385 386 if (len % AES_BLOCK_SIZE) 387 return 0; 388 389 if (ctx->base.enc) { 390 if (plen == NO_PAYLOAD_LENGTH) 391 plen = len; 392 else if (len != 393 ((plen + SHA_DIGEST_LENGTH + 394 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)) 395 return 0; 396 else if (ctx->aux.tls_ver >= TLS1_1_VERSION) 397 iv = AES_BLOCK_SIZE; 398 399 if (plen > (sha_off + iv) 400 && (blocks = (plen - (sha_off + iv)) / SHA_CBLOCK)) { 401 sha1_update(&sctx->md, in + iv, sha_off); 402 403 aesni_cbc_sha1_enc(in, out, blocks, &ctx->ks, ctx->base.iv, 404 &sctx->md, in + iv + sha_off); 405 blocks *= SHA_CBLOCK; 406 aes_off += blocks; 407 sha_off += blocks; 408 sctx->md.Nh += blocks >> 29; 409 sctx->md.Nl += blocks <<= 3; 410 if (sctx->md.Nl < (unsigned int)blocks) 411 sctx->md.Nh++; 412 } else { 413 sha_off = 0; 414 } 415 sha_off += iv; 416 sha1_update(&sctx->md, in + sha_off, plen - sha_off); 417 418 if (plen != len) { /* "TLS" mode of operation */ 419 if (in != out) 420 memcpy(out + aes_off, in + aes_off, plen - aes_off); 421 422 /* calculate HMAC and append it to payload */ 423 SHA1_Final(out + plen, &sctx->md); 424 sctx->md = sctx->tail; 425 sha1_update(&sctx->md, out + plen, SHA_DIGEST_LENGTH); 426 SHA1_Final(out + plen, &sctx->md); 427 428 /* pad the payload|hmac */ 429 plen += SHA_DIGEST_LENGTH; 430 for (l = len - plen - 1; plen < len; plen++) 431 out[plen] = l; 432 /* encrypt HMAC|padding at once */ 433 aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off, 434 &ctx->ks, ctx->base.iv, 1); 435 } else { 436 aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off, 437 &ctx->ks, ctx->base.iv, 1); 438 } 439 } else { 440 union { 441 unsigned int u[SHA_DIGEST_LENGTH / sizeof(unsigned int)]; 442 unsigned char c[32 + SHA_DIGEST_LENGTH]; 443 } mac, *pmac; 444 445 /* arrange cache line alignment */ 446 pmac = (void *)(((size_t)mac.c + 31) & ((size_t)0 - 32)); 447 448 if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */ 449 size_t inp_len, mask, j, i; 450 unsigned int res, maxpad, pad, bitlen; 451 int ret = 1; 452 union { 453 unsigned int u[SHA_LBLOCK]; 454 unsigned char c[SHA_CBLOCK]; 455 } *data = (void *)sctx->md.data; 456 457 if ((ctx->aux.tls_aad[plen - 4] << 8 | ctx->aux.tls_aad[plen - 3]) 458 >= TLS1_1_VERSION) { 459 if (len < (AES_BLOCK_SIZE + SHA_DIGEST_LENGTH + 1)) 460 return 0; 461 462 /* omit explicit iv */ 463 memcpy(ctx->base.iv, in, AES_BLOCK_SIZE); 464 465 in += AES_BLOCK_SIZE; 466 out += AES_BLOCK_SIZE; 467 len -= AES_BLOCK_SIZE; 468 } else if (len < (SHA_DIGEST_LENGTH + 1)) 469 return 0; 470 471 /* decrypt HMAC|padding at once */ 472 aesni_cbc_encrypt(in, out, len, &ctx->ks, ctx->base.iv, 0); 473 474 /* figure out payload length */ 475 pad = out[len - 1]; 476 maxpad = len - (SHA_DIGEST_LENGTH + 1); 477 maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8); 478 maxpad &= 255; 479 480 mask = constant_time_ge(maxpad, pad); 481 ret &= mask; 482 /* 483 * If pad is invalid then we will fail the above test but we must 484 * continue anyway because we are in constant time code. However, 485 * we'll use the maxpad value instead of the supplied pad to make 486 * sure we perform well defined pointer arithmetic. 487 */ 488 pad = constant_time_select(mask, pad, maxpad); 489 490 inp_len = len - (SHA_DIGEST_LENGTH + pad + 1); 491 492 ctx->aux.tls_aad[plen - 2] = inp_len >> 8; 493 ctx->aux.tls_aad[plen - 1] = inp_len; 494 495 /* calculate HMAC */ 496 sctx->md = sctx->head; 497 sha1_update(&sctx->md, ctx->aux.tls_aad, plen); 498 499 /* code containing lucky-13 fix */ 500 len -= SHA_DIGEST_LENGTH; /* amend mac */ 501 if (len >= (256 + SHA_CBLOCK)) { 502 j = (len - (256 + SHA_CBLOCK)) & (0 - SHA_CBLOCK); 503 j += SHA_CBLOCK - sctx->md.num; 504 sha1_update(&sctx->md, out, j); 505 out += j; 506 len -= j; 507 inp_len -= j; 508 } 509 510 /* but pretend as if we hashed padded payload */ 511 bitlen = sctx->md.Nl + (inp_len << 3); /* at most 18 bits */ 512# ifdef BSWAP4 513 bitlen = BSWAP4(bitlen); 514# else 515 mac.c[0] = 0; 516 mac.c[1] = (unsigned char)(bitlen >> 16); 517 mac.c[2] = (unsigned char)(bitlen >> 8); 518 mac.c[3] = (unsigned char)bitlen; 519 bitlen = mac.u[0]; 520# endif /* BSWAP */ 521 522 pmac->u[0] = 0; 523 pmac->u[1] = 0; 524 pmac->u[2] = 0; 525 pmac->u[3] = 0; 526 pmac->u[4] = 0; 527 528 for (res = sctx->md.num, j = 0; j < len; j++) { 529 size_t c = out[j]; 530 mask = (j - inp_len) >> (sizeof(j) * 8 - 8); 531 c &= mask; 532 c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8)); 533 data->c[res++] = (unsigned char)c; 534 535 if (res != SHA_CBLOCK) 536 continue; 537 538 /* j is not incremented yet */ 539 mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1)); 540 data->u[SHA_LBLOCK - 1] |= bitlen & mask; 541 sha1_block_data_order(&sctx->md, data, 1); 542 mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1)); 543 pmac->u[0] |= sctx->md.h0 & mask; 544 pmac->u[1] |= sctx->md.h1 & mask; 545 pmac->u[2] |= sctx->md.h2 & mask; 546 pmac->u[3] |= sctx->md.h3 & mask; 547 pmac->u[4] |= sctx->md.h4 & mask; 548 res = 0; 549 } 550 551 for (i = res; i < SHA_CBLOCK; i++, j++) 552 data->c[i] = 0; 553 554 if (res > SHA_CBLOCK - 8) { 555 mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1)); 556 data->u[SHA_LBLOCK - 1] |= bitlen & mask; 557 sha1_block_data_order(&sctx->md, data, 1); 558 mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1)); 559 pmac->u[0] |= sctx->md.h0 & mask; 560 pmac->u[1] |= sctx->md.h1 & mask; 561 pmac->u[2] |= sctx->md.h2 & mask; 562 pmac->u[3] |= sctx->md.h3 & mask; 563 pmac->u[4] |= sctx->md.h4 & mask; 564 565 memset(data, 0, SHA_CBLOCK); 566 j += 64; 567 } 568 data->u[SHA_LBLOCK - 1] = bitlen; 569 sha1_block_data_order(&sctx->md, data, 1); 570 mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1)); 571 pmac->u[0] |= sctx->md.h0 & mask; 572 pmac->u[1] |= sctx->md.h1 & mask; 573 pmac->u[2] |= sctx->md.h2 & mask; 574 pmac->u[3] |= sctx->md.h3 & mask; 575 pmac->u[4] |= sctx->md.h4 & mask; 576 577# ifdef BSWAP4 578 pmac->u[0] = BSWAP4(pmac->u[0]); 579 pmac->u[1] = BSWAP4(pmac->u[1]); 580 pmac->u[2] = BSWAP4(pmac->u[2]); 581 pmac->u[3] = BSWAP4(pmac->u[3]); 582 pmac->u[4] = BSWAP4(pmac->u[4]); 583# else 584 for (i = 0; i < 5; i++) { 585 res = pmac->u[i]; 586 pmac->c[4 * i + 0] = (unsigned char)(res >> 24); 587 pmac->c[4 * i + 1] = (unsigned char)(res >> 16); 588 pmac->c[4 * i + 2] = (unsigned char)(res >> 8); 589 pmac->c[4 * i + 3] = (unsigned char)res; 590 } 591# endif /* BSWAP4 */ 592 len += SHA_DIGEST_LENGTH; 593 sctx->md = sctx->tail; 594 sha1_update(&sctx->md, pmac->c, SHA_DIGEST_LENGTH); 595 SHA1_Final(pmac->c, &sctx->md); 596 597 /* verify HMAC */ 598 out += inp_len; 599 len -= inp_len; 600 /* version of code with lucky-13 fix */ 601 { 602 unsigned char *p = out + len - 1 - maxpad - SHA_DIGEST_LENGTH; 603 size_t off = out - p; 604 unsigned int c, cmask; 605 606 for (res = 0, i = 0, j = 0; j < maxpad + SHA_DIGEST_LENGTH; j++) { 607 c = p[j]; 608 cmask = 609 ((int)(j - off - SHA_DIGEST_LENGTH)) >> (sizeof(int) * 610 8 - 1); 611 res |= (c ^ pad) & ~cmask; /* ... and padding */ 612 cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1); 613 res |= (c ^ pmac->c[i]) & cmask; 614 i += 1 & cmask; 615 } 616 617 res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1)); 618 ret &= (int)~res; 619 } 620 return ret; 621 } else { 622 /* decrypt HMAC|padding at once */ 623 aesni_cbc_encrypt(in, out, len, &ctx->ks, ctx->base.iv, 0); 624 sha1_update(&sctx->md, out, len); 625 } 626 } 627 628 return 1; 629} 630 631/* EVP_CTRL_AEAD_SET_MAC_KEY */ 632static void aesni_cbc_hmac_sha1_set_mac_key(void *vctx, 633 const unsigned char *mac, size_t len) 634{ 635 PROV_AES_HMAC_SHA1_CTX *ctx = (PROV_AES_HMAC_SHA1_CTX *)vctx; 636 unsigned int i; 637 unsigned char hmac_key[64]; 638 639 memset(hmac_key, 0, sizeof(hmac_key)); 640 641 if (len > (int)sizeof(hmac_key)) { 642 SHA1_Init(&ctx->head); 643 sha1_update(&ctx->head, mac, len); 644 SHA1_Final(hmac_key, &ctx->head); 645 } else { 646 memcpy(hmac_key, mac, len); 647 } 648 649 for (i = 0; i < sizeof(hmac_key); i++) 650 hmac_key[i] ^= 0x36; /* ipad */ 651 SHA1_Init(&ctx->head); 652 sha1_update(&ctx->head, hmac_key, sizeof(hmac_key)); 653 654 for (i = 0; i < sizeof(hmac_key); i++) 655 hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */ 656 SHA1_Init(&ctx->tail); 657 sha1_update(&ctx->tail, hmac_key, sizeof(hmac_key)); 658 659 OPENSSL_cleanse(hmac_key, sizeof(hmac_key)); 660} 661 662/* EVP_CTRL_AEAD_TLS1_AAD */ 663static int aesni_cbc_hmac_sha1_set_tls1_aad(void *vctx, 664 unsigned char *aad_rec, int aad_len) 665{ 666 PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx; 667 PROV_AES_HMAC_SHA1_CTX *sctx = (PROV_AES_HMAC_SHA1_CTX *)vctx; 668 unsigned char *p = aad_rec; 669 unsigned int len; 670 671 if (aad_len != EVP_AEAD_TLS1_AAD_LEN) 672 return -1; 673 674 len = p[aad_len - 2] << 8 | p[aad_len - 1]; 675 676 if (ctx->base.enc) { 677 ctx->payload_length = len; 678 if ((ctx->aux.tls_ver = 679 p[aad_len - 4] << 8 | p[aad_len - 3]) >= TLS1_1_VERSION) { 680 if (len < AES_BLOCK_SIZE) 681 return 0; 682 len -= AES_BLOCK_SIZE; 683 p[aad_len - 2] = len >> 8; 684 p[aad_len - 1] = len; 685 } 686 sctx->md = sctx->head; 687 sha1_update(&sctx->md, p, aad_len); 688 ctx->tls_aad_pad = (int)(((len + SHA_DIGEST_LENGTH + 689 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE) 690 - len); 691 return 1; 692 } else { 693 memcpy(ctx->aux.tls_aad, aad_rec, aad_len); 694 ctx->payload_length = aad_len; 695 ctx->tls_aad_pad = SHA_DIGEST_LENGTH; 696 return 1; 697 } 698} 699 700# if !defined(OPENSSL_NO_MULTIBLOCK) 701 702/* EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE */ 703static int aesni_cbc_hmac_sha1_tls1_multiblock_max_bufsize(void *vctx) 704{ 705 PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx; 706 707 OPENSSL_assert(ctx->multiblock_max_send_fragment != 0); 708 return (int)(5 + 16 709 + (((int)ctx->multiblock_max_send_fragment + 20 + 16) & -16)); 710} 711 712/* EVP_CTRL_TLS1_1_MULTIBLOCK_AAD */ 713static int aesni_cbc_hmac_sha1_tls1_multiblock_aad( 714 void *vctx, EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param) 715{ 716 PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx; 717 PROV_AES_HMAC_SHA1_CTX *sctx = (PROV_AES_HMAC_SHA1_CTX *)vctx; 718 unsigned int n4x = 1, x4; 719 unsigned int frag, last, packlen, inp_len; 720 721 inp_len = param->inp[11] << 8 | param->inp[12]; 722 ctx->multiblock_interleave = param->interleave; 723 724 if (ctx->base.enc) { 725 if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION) 726 return -1; 727 728 if (inp_len) { 729 if (inp_len < 4096) 730 return 0; /* too short */ 731 732 if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5)) 733 n4x = 2; /* AVX2 */ 734 } else if ((n4x = param->interleave / 4) && n4x <= 2) 735 inp_len = param->len; 736 else 737 return -1; 738 739 sctx->md = sctx->head; 740 sha1_update(&sctx->md, param->inp, 13); 741 742 x4 = 4 * n4x; 743 n4x += 1; 744 745 frag = inp_len >> n4x; 746 last = inp_len + frag - (frag << n4x); 747 if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) { 748 frag++; 749 last -= x4 - 1; 750 } 751 752 packlen = 5 + 16 + ((frag + 20 + 16) & -16); 753 packlen = (packlen << n4x) - packlen; 754 packlen += 5 + 16 + ((last + 20 + 16) & -16); 755 756 param->interleave = x4; 757 /* The returned values used by get need to be stored */ 758 ctx->multiblock_interleave = x4; 759 ctx->multiblock_aad_packlen = packlen; 760 return 1; 761 } 762 return -1; /* not yet */ 763} 764 765/* EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT */ 766static int aesni_cbc_hmac_sha1_tls1_multiblock_encrypt( 767 void *ctx, EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param) 768{ 769 return (int)tls1_multi_block_encrypt(ctx, param->out, 770 param->inp, param->len, 771 param->interleave / 4); 772} 773 774# endif /* OPENSSL_NO_MULTIBLOCK */ 775 776static const PROV_CIPHER_HW_AES_HMAC_SHA cipher_hw_aes_hmac_sha1 = { 777 { 778 aesni_cbc_hmac_sha1_init_key, 779 aesni_cbc_hmac_sha1_cipher 780 }, 781 aesni_cbc_hmac_sha1_set_mac_key, 782 aesni_cbc_hmac_sha1_set_tls1_aad, 783# if !defined(OPENSSL_NO_MULTIBLOCK) 784 aesni_cbc_hmac_sha1_tls1_multiblock_max_bufsize, 785 aesni_cbc_hmac_sha1_tls1_multiblock_aad, 786 aesni_cbc_hmac_sha1_tls1_multiblock_encrypt 787# endif 788}; 789 790const PROV_CIPHER_HW_AES_HMAC_SHA *ossl_prov_cipher_hw_aes_cbc_hmac_sha1(void) 791{ 792 return &cipher_hw_aes_hmac_sha1; 793} 794 795#endif /* !defined(AES_CBC_HMAC_SHA_CAPABLE) || !defined(AESNI_CAPABLE) */ 796