crypto/evp/e_aes_cbc_hmac_sha1.c

   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     {
  82     AES_KEY             ks;
  83     SHA_CTX             head,tail,md;
  84     size_t              payload_length; /* AAD length in decrypt case */
  85     union {
  86         unsigned int    tls_ver;
  87         unsigned char   tls_aad[16];    /* 13 used */
  88     } aux;
  89     } EVP_AES_HMAC_SHA1;
  90
  91 #define NO_PAYLOAD_LENGTH       ((size_t)-1)
  92
  93 #if     defined(AES_ASM) &&     ( \
  94         defined(__x86_64)       || defined(__x86_64__)  || \
  95         defined(_M_AMD64)       || defined(_M_X64)      || \
  96         defined(__INTEL__)      )
  97
  98 extern unsigned int OPENSSL_ia32cap_P[3];
  99 #define AESNI_CAPABLE   (1<<(57-32))
 100
 101 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
 102                               AES_KEY *key);
 103 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
 104                               AES_KEY *key);
 105
 106 void aesni_cbc_encrypt(const unsigned char *in,
 107                            unsigned char *out,
 108                            size_t length,
 109                            const AES_KEY *key,
 110                            unsigned char *ivec, int enc);
 111
 112 void aesni_cbc_sha1_enc (const void *inp, void *out, size_t blocks,
 113                 const AES_KEY *key, unsigned char iv[16],
 114                 SHA_CTX *ctx,const void *in0);
 115
 116 void aesni256_cbc_sha1_dec (const void *inp, void *out, size_t blocks,
 117                 const AES_KEY *key, unsigned char iv[16],
 118                 SHA_CTX *ctx,const void *in0);
 119
 120 #define data(ctx) ((EVP_AES_HMAC_SHA1 *)(ctx)->cipher_data)
 121
 122 static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
 123                         const unsigned char *inkey,
 124                         const unsigned char *iv, int enc)
 125         {
 126         EVP_AES_HMAC_SHA1 *key = data(ctx);
 127         int ret;
 128
 129         if (enc)
 130                 ret=aesni_set_encrypt_key(inkey,ctx->key_len*8,&key->ks);
 131         else
 132                 ret=aesni_set_decrypt_key(inkey,ctx->key_len*8,&key->ks);
 133
 134         SHA1_Init(&key->head);  /* handy when benchmarking */
 135         key->tail = key->head;
 136         key->md   = key->head;
 137
 138         key->payload_length = NO_PAYLOAD_LENGTH;
 139
 140         return ret<0?0:1;
 141         }
 142
 143 #define STITCHED_CALL
 144 #undef  STITCHED_DECRYPT_CALL
 145
 146 #if !defined(STITCHED_CALL)
 147 #define aes_off 0
 148 #endif
 149
 150 void sha1_block_data_order (void *c,const void *p,size_t len);
 151
 152 static void sha1_update(SHA_CTX *c,const void *data,size_t len)
 153 {       const unsigned char *ptr = data;
 154         size_t res;
 155
 156         if ((res = c->num)) {
 157                 res = SHA_CBLOCK-res;
 158                 if (len<res) 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) c->Nh++;
 174         }
 175
 176         if (res)
 177                 SHA1_Update(c,ptr,res);
 178 }
 179
 180 #ifdef SHA1_Update
 181 #undef SHA1_Update
 182 #endif
 183 #define SHA1_Update sha1_update
 184
 185 #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
 186
 187 typedef struct { unsigned int A[8],B[8],C[8],D[8],E[8]; } SHA1_MB_CTX;
 188 typedef struct { const unsigned char *ptr; int blocks;  } HASH_DESC;
 189
 190 void sha1_multi_block(SHA1_MB_CTX *,const HASH_DESC *,int);
 191
 192 typedef struct { const unsigned char *inp; unsigned char *out;
 193                  int blocks; u64 iv[2]; } CIPH_DESC;
 194
 195 void aesni_multi_cbc_encrypt(CIPH_DESC *,void *,int);
 196
 197 static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA1 *key,
 198         unsigned char *out, const unsigned char *inp, size_t inp_len,
 199         int n4x)        /* n4x is 1 or 2 */
 200 {
 201         HASH_DESC       hash_d[8], edges[8];
 202         CIPH_DESC       ciph_d[8];
 203         unsigned char   storage[sizeof(SHA1_MB_CTX)+32];
 204         union { u64     q[16];
 205                 u32     d[32];
 206                 u8      c[128]; } blocks[8];
 207         SHA1_MB_CTX     *ctx;
 208         unsigned int    frag, last, packlen, i, x4=4*n4x;
 209         size_t          ret = 0;
 210         u8              *IVs;
 211 #if defined(BSWAP8)
 212         u64             seqnum;
 213 #endif
 214
 215         ctx = (SHA1_MB_CTX *)(storage+32-((size_t)storage%32)); /* align */
 216
 217         frag = (unsigned int)inp_len>>(1+n4x);
 218         last = (unsigned int)inp_len+frag-(frag<<(1+n4x));
 219         if (last>frag && ((last+13+9)%64)<(x4-1)) {
 220                 frag++;
 221                 last -= x4-1;
 222         }
 223
 224         hash_d[0].ptr = inp;
 225         for (i=1;i<x4;i++)      hash_d[i].ptr = hash_d[i-1].ptr+frag;
 226
 227 #if defined(BSWAP8)
 228         memcpy(blocks[0].c,key->md.data,8);
 229         seqnum = BSWAP8(blocks[0].q[0]);
 230 #endif
 231         for (i=0;i<x4;i++) {
 232                 unsigned int len = (i==(x4-1)?last:frag);
 233
 234                 ctx->A[i] = key->md.h0;
 235                 ctx->B[i] = key->md.h1;
 236                 ctx->C[i] = key->md.h2;
 237                 ctx->D[i] = key->md.h3;
 238                 ctx->E[i] = key->md.h4;
 239
 240                 /* fix seqnum */
 241 #if defined(BSWAP8)
 242                 blocks[i].q[0] = BSWAP8(seqnum+i);
 243 #else
 244                 blocks[i].c[7] += ((u8*)key->md.data)[7]+i;
 245                 if (blocks[i].c[7] < i) {
 246                         int j;
 247
 248                         for (j=6;j>=0;j--) {
 249                                 if (blocks[i].c[j]=((u8*)key->md.data)[j]+1) break;
 250                         }
 251                 }
 252 #endif
 253                 blocks[i].c[8] = ((u8*)key->md.data)[8];
 254                 blocks[i].c[9] = ((u8*)key->md.data)[9];
 255                 blocks[i].c[10] = ((u8*)key->md.data)[10];
 256                 /* fix length */
 257                 blocks[i].c[11] = (u8)(len>>8);
 258                 blocks[i].c[12] = (u8)(len);
 259
 260                 memcpy(blocks[i].c+13,hash_d[i].ptr,64-13);
 261                 hash_d[i].ptr += 64-13;
 262                 hash_d[i].blocks = (len-(64-13))/64;
 263
 264                 edges[i].ptr = blocks[i].c;
 265                 edges[i].blocks = 1;
 266         }
 267
 268         /* hash 13-byte headers and first 64-13 bytes of inputs */
 269         sha1_multi_block(ctx,edges,n4x);
 270         /* hash bulk inputs */
 271         sha1_multi_block(ctx,hash_d,n4x);
 272
 273         memset(blocks,0,sizeof(blocks));
 274         for (i=0;i<x4;i++) {
 275                 unsigned int            len = (i==(x4-1)?last:frag),
 276                                         off = hash_d[i].blocks*64;
 277                 const unsigned char    *ptr = hash_d[i].ptr+off;
 278
 279                 off = len-(64-13)-off;  /* remainder actually */
 280                 memcpy(blocks[i].c,ptr,off);
 281                 blocks[i].c[off]=0x80;
 282                 len += 64+13;           /* 64 is HMAC header */
 283                 len *= 8;               /* convert to bits */
 284                 if (off<(64-8)) {
 285                         blocks[i].d[15] = BSWAP4(len);
 286                         edges[i].blocks = 1;
 287                 } else {
 288                         blocks[i].d[31] = BSWAP4(len);
 289                         edges[i].blocks = 2;
 290                 }
 291                 edges[i].ptr = blocks[i].c;
 292         }
 293
 294         /* hash input tails and finalize */
 295         sha1_multi_block(ctx,edges,n4x);
 296
 297         memset(blocks,0,sizeof(blocks));
 298         for (i=0;i<x4;i++) {
 299                 blocks[i].d[0] = BSWAP4(ctx->A[i]);     ctx->A[i] = key->tail.h0;
 300                 blocks[i].d[1] = BSWAP4(ctx->B[i]);     ctx->B[i] = key->tail.h1;
 301                 blocks[i].d[2] = BSWAP4(ctx->C[i]);     ctx->C[i] = key->tail.h2;
 302                 blocks[i].d[3] = BSWAP4(ctx->D[i]);     ctx->D[i] = key->tail.h3;
 303                 blocks[i].d[4] = BSWAP4(ctx->E[i]);     ctx->E[i] = key->tail.h4;
 304                 blocks[i].c[20] = 0x80;
 305                 blocks[i].d[15] = BSWAP4((64+20)*8);
 306                 edges[i].ptr = blocks[i].c;
 307                 edges[i].blocks = 1;
 308         }
 309
 310         /* finalize MACs */
 311         sha1_multi_block(ctx,edges,n4x);
 312
 313         packlen = 5+16+((frag+20+16)&-16);
 314
 315         out += (packlen<<(1+n4x))-packlen;
 316         inp += (frag<<(1+n4x))-frag;
 317
 318         RAND_bytes((IVs=blocks[0].c),16*x4);    /* ask for IVs in bulk */
 319
 320         for (i=x4-1;;i--) {
 321                 unsigned int len = (i==(x4-1)?last:frag), pad, j;
 322                 unsigned char *out0 = out;
 323
 324                 out += 5+16;            /* place for header and explicit IV */
 325                 ciph_d[i].inp = out;
 326                 ciph_d[i].out = out;
 327
 328                 memmove(out,inp,len);
 329                 out += len;
 330
 331                 /* write MAC */
 332                 ((u32 *)out)[0] = BSWAP4(ctx->A[i]);
 333                 ((u32 *)out)[1] = BSWAP4(ctx->B[i]);
 334                 ((u32 *)out)[2] = BSWAP4(ctx->C[i]);
 335                 ((u32 *)out)[3] = BSWAP4(ctx->D[i]);
 336                 ((u32 *)out)[4] = BSWAP4(ctx->E[i]);
 337                 out += 20;
 338                 len += 20;
 339
 340                 /* pad */
 341                 pad = 15-len%16;
 342                 for (j=0;j<=pad;j++) *(out++) = pad;
 343                 len += pad+1;
 344
 345                 ciph_d[i].blocks = len/16;
 346                 len += 16;      /* account for explicit iv */
 347
 348                 /* arrange header */
 349                 out0[0] = ((u8*)key->md.data)[8];
 350                 out0[1] = ((u8*)key->md.data)[9];
 351                 out0[2] = ((u8*)key->md.data)[10];
 352                 out0[3] = (u8)(len>>8);
 353                 out0[4] = (u8)(len);
 354
 355                 /* explicit iv */
 356                 memcpy(ciph_d[i].iv, IVs, 16);
 357                 memcpy(&out0[5],     IVs, 16);
 358
 359                 ret += len+5;
 360
 361                 if (i==0) break;
 362
 363                 out = out0-packlen;
 364                 inp -= frag;
 365                 IVs += 16;
 366         }
 367
 368         aesni_multi_cbc_encrypt(ciph_d,&key->ks,n4x);
 369
 370         OPENSSL_cleanse(blocks,sizeof(blocks));
 371         OPENSSL_cleanse(ctx,sizeof(*ctx));
 372
 373         return ret;
 374 }
 375 #endif
 376
 377 static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 378                       const unsigned char *in, size_t len)
 379         {
 380         EVP_AES_HMAC_SHA1 *key = data(ctx);
 381         unsigned int l;
 382         size_t  plen = key->payload_length,
 383                 iv = 0,         /* explicit IV in TLS 1.1 and later */
 384                 sha_off = 0;
 385 #if defined(STITCHED_CALL)
 386         size_t  aes_off = 0,
 387                 blocks;
 388
 389         sha_off = SHA_CBLOCK-key->md.num;
 390 #endif
 391
 392         key->payload_length = NO_PAYLOAD_LENGTH;
 393
 394         if (len%AES_BLOCK_SIZE) return 0;
 395
 396         if (ctx->encrypt) {
 397                 if (plen==NO_PAYLOAD_LENGTH)
 398                         plen = len;
 399                 else if (len!=((plen+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE))
 400                         return 0;
 401                 else if (key->aux.tls_ver >= TLS1_1_VERSION)
 402                         iv = AES_BLOCK_SIZE;
 403
 404 #if defined(STITCHED_CALL)
 405                 if (plen>(sha_off+iv) && (blocks=(plen-(sha_off+iv))/SHA_CBLOCK)) {
 406                         SHA1_Update(&key->md,in+iv,sha_off);
 407
 408                         aesni_cbc_sha1_enc(in,out,blocks,&key->ks,
 409                                 ctx->iv,&key->md,in+iv+sha_off);
 410                         blocks *= SHA_CBLOCK;
 411                         aes_off += blocks;
 412                         sha_off += blocks;
 413                         key->md.Nh += blocks>>29;
 414                         key->md.Nl += blocks<<=3;
 415                         if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
 416                 } else {
 417                         sha_off = 0;
 418                 }
 419 #endif
 420                 sha_off += iv;
 421                 SHA1_Update(&key->md,in+sha_off,plen-sha_off);
 422
 423                 if (plen!=len)  {       /* "TLS" mode of operation */
 424                         if (in!=out)
 425                                 memcpy(out+aes_off,in+aes_off,plen-aes_off);
 426
 427                         /* calculate HMAC and append it to payload */
 428                         SHA1_Final(out+plen,&key->md);
 429                         key->md = key->tail;
 430                         SHA1_Update(&key->md,out+plen,SHA_DIGEST_LENGTH);
 431                         SHA1_Final(out+plen,&key->md);
 432
 433                         /* pad the payload|hmac */
 434                         plen += SHA_DIGEST_LENGTH;
 435                         for (l=len-plen-1;plen<len;plen++) out[plen]=l;
 436                         /* encrypt HMAC|padding at once */
 437                         aesni_cbc_encrypt(out+aes_off,out+aes_off,len-aes_off,
 438                                         &key->ks,ctx->iv,1);
 439                 } else {
 440                         aesni_cbc_encrypt(in+aes_off,out+aes_off,len-aes_off,
 441                                         &key->ks,ctx->iv,1);
 442                 }
 443         } else {
 444                 union { unsigned int  u[SHA_DIGEST_LENGTH/sizeof(unsigned int)];
 445                         unsigned char c[32+SHA_DIGEST_LENGTH]; } mac, *pmac;
 446
 447                 /* arrange cache line alignment */
 448                 pmac = (void *)(((size_t)mac.c+31)&((size_t)0-32));
 449
 450                 if (plen != NO_PAYLOAD_LENGTH) {        /* "TLS" mode of operation */
 451                         size_t inp_len, mask, j, i;
 452                         unsigned int res, maxpad, pad, bitlen;
 453                         int ret = 1;
 454                         union { unsigned int  u[SHA_LBLOCK];
 455                                 unsigned char c[SHA_CBLOCK]; }
 456                                 *data = (void *)key->md.data;
 457 #if defined(STITCHED_DECRYPT_CALL)
 458                         unsigned char tail_iv[AES_BLOCK_SIZE];
 459                         int stitch=0;
 460 #endif
 461
 462                         if ((key->aux.tls_aad[plen-4]<<8|key->aux.tls_aad[plen-3])
 463                             >= TLS1_1_VERSION) {
 464                                 if (len<(AES_BLOCK_SIZE+SHA_DIGEST_LENGTH+1))
 465                                         return 0;
 466
 467                                 /* omit explicit iv */
 468                                 memcpy(ctx->iv,in,AES_BLOCK_SIZE);
 469                                 in  += AES_BLOCK_SIZE;
 470                                 out += AES_BLOCK_SIZE;
 471                                 len -= AES_BLOCK_SIZE;
 472                         }
 473                         else if (len<(SHA_DIGEST_LENGTH+1))
 474                                 return 0;
 475
 476 #if defined(STITCHED_DECRYPT_CALL)
 477                         if (len>=1024 && ctx->key_len==32) {
 478                                 /* decrypt last block */
 479                                 memcpy(tail_iv,in+len-2*AES_BLOCK_SIZE,AES_BLOCK_SIZE);
 480                                 aesni_cbc_encrypt(in+len-AES_BLOCK_SIZE,
 481                                                 out+len-AES_BLOCK_SIZE,AES_BLOCK_SIZE,
 482                                                 &key->ks,tail_iv,0);
 483                                 stitch=1;
 484                         } else
 485 #endif
 486                         /* decrypt HMAC|padding at once */
 487                         aesni_cbc_encrypt(in,out,len,
 488                                         &key->ks,ctx->iv,0);
 489
 490                         /* figure out payload length */
 491                         pad = out[len-1];
 492                         maxpad = len-(SHA_DIGEST_LENGTH+1);
 493                         maxpad |= (255-maxpad)>>(sizeof(maxpad)*8-8);
 494                         maxpad &= 255;
 495
 496                         inp_len = len - (SHA_DIGEST_LENGTH+pad+1);
 497                         mask = (0-((inp_len-len)>>(sizeof(inp_len)*8-1)));
 498                         inp_len &= mask;
 499                         ret &= (int)mask;
 500
 501                         key->aux.tls_aad[plen-2] = inp_len>>8;
 502                         key->aux.tls_aad[plen-1] = inp_len;
 503
 504                         /* calculate HMAC */
 505                         key->md = key->head;
 506                         SHA1_Update(&key->md,key->aux.tls_aad,plen);
 507
 508 #if defined(STITCHED_DECRYPT_CALL)
 509                         if (stitch) {
 510                                 blocks = (len-(256+32+SHA_CBLOCK))/SHA_CBLOCK;
 511                                 aes_off = len-AES_BLOCK_SIZE-blocks*SHA_CBLOCK;
 512                                 sha_off = SHA_CBLOCK-plen;
 513
 514                                 aesni_cbc_encrypt(in,out,aes_off,
 515                                         &key->ks,ctx->iv,0);
 516
 517                                 SHA1_Update(&key->md,out,sha_off);
 518                                 aesni256_cbc_sha1_dec(in+aes_off,
 519                                         out+aes_off,blocks,&key->ks,ctx->iv,
 520                                         &key->md,out+sha_off);
 521
 522                                 sha_off += blocks*=SHA_CBLOCK;
 523                                 out += sha_off;
 524                                 len -= sha_off;
 525                                 inp_len -= sha_off;
 526
 527                                 key->md.Nl += (blocks<<3);      /* at most 18 bits */
 528                                 memcpy(ctx->iv,tail_iv,AES_BLOCK_SIZE);
 529                         }
 530 #endif
 531
 532 #if 1
 533                         len -= SHA_DIGEST_LENGTH;               /* amend mac */
 534                         if (len>=(256+SHA_CBLOCK)) {
 535                                 j = (len-(256+SHA_CBLOCK))&(0-SHA_CBLOCK);
 536                                 j += SHA_CBLOCK-key->md.num;
 537                                 SHA1_Update(&key->md,out,j);
 538                                 out += j;
 539                                 len -= j;
 540                                 inp_len -= j;
 541                         }
 542
 543                         /* but pretend as if we hashed padded payload */
 544                         bitlen = key->md.Nl+(inp_len<<3);       /* at most 18 bits */
 545 #ifdef BSWAP4
 546                         bitlen = BSWAP4(bitlen);
 547 #else
 548                         mac.c[0] = 0;
 549                         mac.c[1] = (unsigned char)(bitlen>>16);
 550                         mac.c[2] = (unsigned char)(bitlen>>8);
 551                         mac.c[3] = (unsigned char)bitlen;
 552                         bitlen = mac.u[0];
 553 #endif
 554
 555                         pmac->u[0]=0;
 556                         pmac->u[1]=0;
 557                         pmac->u[2]=0;
 558                         pmac->u[3]=0;
 559                         pmac->u[4]=0;
 560
 561                         for (res=key->md.num, j=0;j<len;j++) {
 562                                 size_t c = out[j];
 563                                 mask = (j-inp_len)>>(sizeof(j)*8-8);
 564                                 c &= mask;
 565                                 c |= 0x80&~mask&~((inp_len-j)>>(sizeof(j)*8-8));
 566                                 data->c[res++]=(unsigned char)c;
 567
 568                                 if (res!=SHA_CBLOCK) continue;
 569
 570                                 /* j is not incremented yet */
 571                                 mask = 0-((inp_len+7-j)>>(sizeof(j)*8-1));
 572                                 data->u[SHA_LBLOCK-1] |= bitlen&mask;
 573                                 sha1_block_data_order(&key->md,data,1);
 574                                 mask &= 0-((j-inp_len-72)>>(sizeof(j)*8-1));
 575                                 pmac->u[0] |= key->md.h0 & mask;
 576                                 pmac->u[1] |= key->md.h1 & mask;
 577                                 pmac->u[2] |= key->md.h2 & mask;
 578                                 pmac->u[3] |= key->md.h3 & mask;
 579                                 pmac->u[4] |= key->md.h4 & mask;
 580                                 res=0;
 581                         }
 582
 583                         for(i=res;i<SHA_CBLOCK;i++,j++) data->c[i]=0;
 584
 585                         if (res>SHA_CBLOCK-8) {
 586                                 mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
 587                                 data->u[SHA_LBLOCK-1] |= bitlen&mask;
 588                                 sha1_block_data_order(&key->md,data,1);
 589                                 mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
 590                                 pmac->u[0] |= key->md.h0 & mask;
 591                                 pmac->u[1] |= key->md.h1 & mask;
 592                                 pmac->u[2] |= key->md.h2 & mask;
 593                                 pmac->u[3] |= key->md.h3 & mask;
 594                                 pmac->u[4] |= key->md.h4 & mask;
 595
 596                                 memset(data,0,SHA_CBLOCK);
 597                                 j+=64;
 598                         }
 599                         data->u[SHA_LBLOCK-1] = bitlen;
 600                         sha1_block_data_order(&key->md,data,1);
 601                         mask = 0-((j-inp_len-73)>>(sizeof(j)*8-1));
 602                         pmac->u[0] |= key->md.h0 & mask;
 603                         pmac->u[1] |= key->md.h1 & mask;
 604                         pmac->u[2] |= key->md.h2 & mask;
 605                         pmac->u[3] |= key->md.h3 & mask;
 606                         pmac->u[4] |= key->md.h4 & mask;
 607
 608 #ifdef BSWAP4
 609                         pmac->u[0] = BSWAP4(pmac->u[0]);
 610                         pmac->u[1] = BSWAP4(pmac->u[1]);
 611                         pmac->u[2] = BSWAP4(pmac->u[2]);
 612                         pmac->u[3] = BSWAP4(pmac->u[3]);
 613                         pmac->u[4] = BSWAP4(pmac->u[4]);
 614 #else
 615                         for (i=0;i<5;i++) {
 616                                 res = pmac->u[i];
 617                                 pmac->c[4*i+0]=(unsigned char)(res>>24);
 618                                 pmac->c[4*i+1]=(unsigned char)(res>>16);
 619                                 pmac->c[4*i+2]=(unsigned char)(res>>8);
 620                                 pmac->c[4*i+3]=(unsigned char)res;
 621                         }
 622 #endif
 623                         len += SHA_DIGEST_LENGTH;
 624 #else
 625                         SHA1_Update(&key->md,out,inp_len);
 626                         res = key->md.num;
 627                         SHA1_Final(pmac->c,&key->md);
 628
 629                         {
 630                         unsigned int inp_blocks, pad_blocks;
 631
 632                         /* but pretend as if we hashed padded payload */
 633                         inp_blocks = 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
 634                         res += (unsigned int)(len-inp_len);
 635                         pad_blocks = res / SHA_CBLOCK;
 636                         res %= SHA_CBLOCK;
 637                         pad_blocks += 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
 638                         for (;inp_blocks<pad_blocks;inp_blocks++)
 639                                 sha1_block_data_order(&key->md,data,1);
 640                         }
 641 #endif
 642                         key->md = key->tail;
 643                         SHA1_Update(&key->md,pmac->c,SHA_DIGEST_LENGTH);
 644                         SHA1_Final(pmac->c,&key->md);
 645
 646                         /* verify HMAC */
 647                         out += inp_len;
 648                         len -= inp_len;
 649 #if 1
 650                         {
 651                         unsigned char *p = out+len-1-maxpad-SHA_DIGEST_LENGTH;
 652                         size_t off = out-p;
 653                         unsigned int c, cmask;
 654
 655                         maxpad += SHA_DIGEST_LENGTH;
 656                         for (res=0,i=0,j=0;j<maxpad;j++) {
 657                                 c = p[j];
 658                                 cmask = ((int)(j-off-SHA_DIGEST_LENGTH))>>(sizeof(int)*8-1);
 659                                 res |= (c^pad)&~cmask;  /* ... and padding */
 660                                 cmask &= ((int)(off-1-j))>>(sizeof(int)*8-1);
 661                                 res |= (c^pmac->c[i])&cmask;
 662                                 i += 1&cmask;
 663                         }
 664                         maxpad -= SHA_DIGEST_LENGTH;
 665
 666                         res = 0-((0-res)>>(sizeof(res)*8-1));
 667                         ret &= (int)~res;
 668                         }
 669 #else
 670                         for (res=0,i=0;i<SHA_DIGEST_LENGTH;i++)
 671                                 res |= out[i]^pmac->c[i];
 672                         res = 0-((0-res)>>(sizeof(res)*8-1));
 673                         ret &= (int)~res;
 674
 675                         /* verify padding */
 676                         pad = (pad&~res) | (maxpad&res);
 677                         out = out+len-1-pad;
 678                         for (res=0,i=0;i<pad;i++)
 679                                 res |= out[i]^pad;
 680
 681                         res = (0-res)>>(sizeof(res)*8-1);
 682                         ret &= (int)~res;
 683 #endif
 684                         return ret;
 685                 } else {
 686 #if defined(STITCHED_DECRYPT_CALL)
 687                         if (len>=1024 && ctx->key_len==32) {
 688                                 if (sha_off%=SHA_CBLOCK)
 689                                         blocks = (len-3*SHA_CBLOCK)/SHA_CBLOCK;
 690                                 else
 691                                         blocks = (len-2*SHA_CBLOCK)/SHA_CBLOCK;
 692                                 aes_off = len-blocks*SHA_CBLOCK;
 693
 694                                 aesni_cbc_encrypt(in,out,aes_off,
 695                                         &key->ks,ctx->iv,0);
 696                                 SHA1_Update(&key->md,out,sha_off);
 697                                 aesni256_cbc_sha1_dec(in+aes_off,
 698                                         out+aes_off,blocks,&key->ks,ctx->iv,
 699                                         &key->md,out+sha_off);
 700
 701                                 sha_off += blocks*=SHA_CBLOCK;
 702                                 out += sha_off;
 703                                 len -= sha_off;
 704
 705                                 key->md.Nh += blocks>>29;
 706                                 key->md.Nl += blocks<<=3;
 707                                 if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
 708                         } else
 709 #endif
 710                         /* decrypt HMAC|padding at once */
 711                         aesni_cbc_encrypt(in,out,len,
 712                                         &key->ks,ctx->iv,0);
 713
 714                         SHA1_Update(&key->md,out,len);
 715                 }
 716         }
 717
 718         return 1;
 719         }
 720
 721 static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
 722         {
 723         EVP_AES_HMAC_SHA1 *key = data(ctx);
 724
 725         switch (type)
 726                 {
 727         case EVP_CTRL_AEAD_SET_MAC_KEY:
 728                 {
 729                 unsigned int  i;
 730                 unsigned char hmac_key[64];
 731
 732                 memset (hmac_key,0,sizeof(hmac_key));
 733
 734                 if (arg > (int)sizeof(hmac_key)) {
 735                         SHA1_Init(&key->head);
 736                         SHA1_Update(&key->head,ptr,arg);
 737                         SHA1_Final(hmac_key,&key->head);
 738                 } else {
 739                         memcpy(hmac_key,ptr,arg);
 740                 }
 741
 742                 for (i=0;i<sizeof(hmac_key);i++)
 743                         hmac_key[i] ^= 0x36;            /* ipad */
 744                 SHA1_Init(&key->head);
 745                 SHA1_Update(&key->head,hmac_key,sizeof(hmac_key));
 746
 747                 for (i=0;i<sizeof(hmac_key);i++)
 748                         hmac_key[i] ^= 0x36^0x5c;       /* opad */
 749                 SHA1_Init(&key->tail);
 750                 SHA1_Update(&key->tail,hmac_key,sizeof(hmac_key));
 751
 752                 OPENSSL_cleanse(hmac_key,sizeof(hmac_key));
 753
 754                 return 1;
 755                 }
 756         case EVP_CTRL_AEAD_TLS1_AAD:
 757                 {
 758                 unsigned char *p=ptr;
 759                 unsigned int   len=p[arg-2]<<8|p[arg-1];
 760
 761                 if (ctx->encrypt)
 762                         {
 763                         key->payload_length = len;
 764                         if ((key->aux.tls_ver=p[arg-4]<<8|p[arg-3]) >= TLS1_1_VERSION) {
 765                                 len -= AES_BLOCK_SIZE;
 766                                 p[arg-2] = len>>8;
 767                                 p[arg-1] = len;
 768                         }
 769                         key->md = key->head;
 770                         SHA1_Update(&key->md,p,arg);
 771
 772                         return (int)(((len+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE)
 773                                 - len);
 774                         }
 775                 else
 776                         {
 777                         if (arg>13) arg = 13;
 778                         memcpy(key->aux.tls_aad,ptr,arg);
 779                         key->payload_length = arg;
 780
 781                         return SHA_DIGEST_LENGTH;
 782                         }
 783                 }
 784 #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
 785         case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
 786                 return (int)(5+16+((arg+20+16)&-16));
 787         case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
 788                 {
 789                 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
 790                         (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
 791                 unsigned int n4x=1, x4;
 792                 unsigned int frag, last, packlen, inp_len;
 793
 794                 if (arg<sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) return -1;
 795
 796                 inp_len = param->inp[11]<<8|param->inp[12];
 797
 798                 if (ctx->encrypt)
 799                         {
 800                         if ((param->inp[9]<<8|param->inp[10]) < TLS1_1_VERSION)
 801                                 return -1;
 802
 803                         if (inp_len)
 804                                 {
 805                                 if (inp_len<4096) return 0;     /* too short */
 806
 807                                 if (inp_len>=8192 && OPENSSL_ia32cap_P[2]&(1<<5))
 808                                         n4x=2;  /* AVX2 */
 809                                 }
 810                         else if ((n4x=param->interleave/4) && n4x<=2)
 811                                 inp_len = param->len;
 812                         else
 813                                 return -1;
 814
 815                         key->md = key->head;
 816                         SHA1_Update(&key->md,param->inp,13);
 817
 818                         x4 = 4*n4x; n4x += 1;
 819
 820                         frag = inp_len>>n4x;
 821                         last = inp_len+frag-(frag<<n4x);
 822                         if (last>frag && ((last+13+9)%64<(x4-1))) {
 823                                 frag++;
 824                                 last -= x4-1;
 825                         }
 826
 827                         packlen = 5+16+((frag+20+16)&-16);
 828                         packlen = (packlen<<n4x)-packlen;
 829                         packlen += 5+16+((last+20+16)&-16);
 830
 831                         param->interleave = x4;
 832
 833                         return (int)packlen;
 834                         }
 835                 else
 836                         return -1;      /* not yet */
 837                 }
 838         case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
 839                 {
 840                 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
 841                         (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
 842
 843                 return (int)tls1_1_multi_block_encrypt(key,param->out,param->inp,
 844                                                 param->len,param->interleave/4);
 845                 }
 846         case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
 847 #endif
 848         default:
 849                 return -1;
 850                 }
 851         }
 852
 853 static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher =
 854         {
 855 #ifdef NID_aes_128_cbc_hmac_sha1
 856         NID_aes_128_cbc_hmac_sha1,
 857 #else
 858         NID_undef,
 859 #endif
 860         16,16,16,
 861         EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|
 862         EVP_CIPH_FLAG_AEAD_CIPHER|EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
 863         aesni_cbc_hmac_sha1_init_key,
 864         aesni_cbc_hmac_sha1_cipher,
 865         NULL,
 866         sizeof(EVP_AES_HMAC_SHA1),
 867         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
 868         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
 869         aesni_cbc_hmac_sha1_ctrl,
 870         NULL
 871         };
 872
 873 static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher =
 874         {
 875 #ifdef NID_aes_256_cbc_hmac_sha1
 876         NID_aes_256_cbc_hmac_sha1,
 877 #else
 878         NID_undef,
 879 #endif
 880         16,32,16,
 881         EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|
 882         EVP_CIPH_FLAG_AEAD_CIPHER|EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
 883         aesni_cbc_hmac_sha1_init_key,
 884         aesni_cbc_hmac_sha1_cipher,
 885         NULL,
 886         sizeof(EVP_AES_HMAC_SHA1),
 887         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
 888         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
 889         aesni_cbc_hmac_sha1_ctrl,
 890         NULL
 891         };
 892
 893 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
 894         {
 895         return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
 896                 &aesni_128_cbc_hmac_sha1_cipher:NULL);
 897         }
 898
 899 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
 900         {
 901         return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
 902                 &aesni_256_cbc_hmac_sha1_cipher:NULL);
 903         }
 904 #else
 905 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
 906         {
 907         return NULL;
 908         }
 909 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
 910         {
 911         return NULL;
 912         }
 913 #endif
 914 #endif