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, minblocks, processed=0;
 209         size_t          ret = 0;
 210         u8              *IVs;
 211 #if defined(BSWAP8)
 212         u64             seqnum;
 213 #endif
 214
 215         if (RAND_bytes((IVs=blocks[0].c),16*x4)<=0)     /* ask for IVs in bulk */
 216                 return 0;
 217
 218         ctx = (SHA1_MB_CTX *)(storage+32-((size_t)storage%32)); /* align */
 219
 220         frag = (unsigned int)inp_len>>(1+n4x);
 221         last = (unsigned int)inp_len+frag-(frag<<(1+n4x));
 222         if (last>frag && ((last+13+9)%64)<(x4-1)) {
 223                 frag++;
 224                 last -= x4-1;
 225         }
 226
 227         packlen = 5+16+((frag+20+16)&-16);
 228
 229         /* populate descriptors with pointers and IVs */
 230         hash_d[0].ptr = inp;
 231         ciph_d[0].inp = inp;
 232         ciph_d[0].out = out+5+16;       /* 5+16 is place for header and explicit IV */
 233         memcpy(ciph_d[0].out-16,IVs,16);
 234         memcpy(ciph_d[0].iv,IVs,16);    IVs += 16;
 235
 236         for (i=1;i<x4;i++) {
 237                 ciph_d[i].inp = hash_d[i].ptr = hash_d[i-1].ptr+frag;
 238                 ciph_d[i].out = ciph_d[i-1].out+packlen;
 239                 memcpy(ciph_d[i].out-16,IVs,16);
 240                 memcpy(ciph_d[i].iv,IVs,16);    IVs+=16;
 241         }
 242
 243 #if defined(BSWAP8)
 244         memcpy(blocks[0].c,key->md.data,8);
 245         seqnum = BSWAP8(blocks[0].q[0]);
 246 #endif
 247         for (i=0;i<x4;i++) {
 248                 unsigned int len = (i==(x4-1)?last:frag);
 249
 250                 ctx->A[i] = key->md.h0;
 251                 ctx->B[i] = key->md.h1;
 252                 ctx->C[i] = key->md.h2;
 253                 ctx->D[i] = key->md.h3;
 254                 ctx->E[i] = key->md.h4;
 255
 256                 /* fix seqnum */
 257 #if defined(BSWAP8)
 258                 blocks[i].q[0] = BSWAP8(seqnum+i);
 259 #else
 260                 blocks[i].c[7] += ((u8*)key->md.data)[7]+i;
 261                 if (blocks[i].c[7] < i) {
 262                         int j;
 263
 264                         for (j=6;j>=0;j--) {
 265                                 if (blocks[i].c[j]=((u8*)key->md.data)[j]+1) break;
 266                         }
 267                 }
 268 #endif
 269                 blocks[i].c[8] = ((u8*)key->md.data)[8];
 270                 blocks[i].c[9] = ((u8*)key->md.data)[9];
 271                 blocks[i].c[10] = ((u8*)key->md.data)[10];
 272                 /* fix length */
 273                 blocks[i].c[11] = (u8)(len>>8);
 274                 blocks[i].c[12] = (u8)(len);
 275
 276                 memcpy(blocks[i].c+13,hash_d[i].ptr,64-13);
 277                 hash_d[i].ptr += 64-13;
 278                 hash_d[i].blocks = (len-(64-13))/64;
 279
 280                 edges[i].ptr = blocks[i].c;
 281                 edges[i].blocks = 1;
 282         }
 283
 284         /* hash 13-byte headers and first 64-13 bytes of inputs */
 285         sha1_multi_block(ctx,edges,n4x);
 286         /* hash bulk inputs */
 287 #define MAXCHUNKSIZE    2048
 288 #if     MAXCHUNKSIZE%64
 289 #error  "MAXCHUNKSIZE is not divisible by 64"
 290 #elif   MAXCHUNKSIZE
 291         /* goal is to minimize pressure on L1 cache by moving
 292          * in shorter steps, so that hashed data is still in
 293          * the cache by the time we encrypt it */
 294         minblocks = ((frag<=last ? frag : last)-(64-13))/64;
 295         if (minblocks>MAXCHUNKSIZE/64) {
 296                 for (i=0;i<x4;i++) {
 297                         edges[i].ptr     = hash_d[i].ptr;
 298                         edges[i].blocks  = MAXCHUNKSIZE/64;
 299                         ciph_d[i].blocks = MAXCHUNKSIZE/16;
 300                 }
 301                 do {
 302                         sha1_multi_block(ctx,edges,n4x);
 303                         aesni_multi_cbc_encrypt(ciph_d,&key->ks,n4x);
 304
 305                         for (i=0;i<x4;i++) {
 306                                 edges[i].ptr     = hash_d[i].ptr += MAXCHUNKSIZE;
 307                                 hash_d[i].blocks -= MAXCHUNKSIZE/64;
 308                                 edges[i].blocks  = MAXCHUNKSIZE/64;
 309                                 ciph_d[i].inp    += MAXCHUNKSIZE;
 310                                 ciph_d[i].out    += MAXCHUNKSIZE;
 311                                 ciph_d[i].blocks = MAXCHUNKSIZE/16;
 312                                 memcpy(ciph_d[i].iv,ciph_d[i].out-16,16);
 313                         }
 314                         processed += MAXCHUNKSIZE;
 315                         minblocks -= MAXCHUNKSIZE/64;
 316                 } while (minblocks>MAXCHUNKSIZE/64);
 317         }
 318 #endif
 319 #undef  MAXCHUNKSIZE
 320         sha1_multi_block(ctx,hash_d,n4x);
 321
 322         memset(blocks,0,sizeof(blocks));
 323         for (i=0;i<x4;i++) {
 324                 unsigned int            len = (i==(x4-1)?last:frag),
 325                                         off = hash_d[i].blocks*64;
 326                 const unsigned char    *ptr = hash_d[i].ptr+off;
 327
 328                 off = (len-processed)-(64-13)-off;      /* remainder actually */
 329                 memcpy(blocks[i].c,ptr,off);
 330                 blocks[i].c[off]=0x80;
 331                 len += 64+13;           /* 64 is HMAC header */
 332                 len *= 8;               /* convert to bits */
 333                 if (off<(64-8)) {
 334                         blocks[i].d[15] = BSWAP4(len);
 335                         edges[i].blocks = 1;
 336                 } else {
 337                         blocks[i].d[31] = BSWAP4(len);
 338                         edges[i].blocks = 2;
 339                 }
 340                 edges[i].ptr = blocks[i].c;
 341         }
 342
 343         /* hash input tails and finalize */
 344         sha1_multi_block(ctx,edges,n4x);
 345
 346         memset(blocks,0,sizeof(blocks));
 347         for (i=0;i<x4;i++) {
 348                 blocks[i].d[0] = BSWAP4(ctx->A[i]);     ctx->A[i] = key->tail.h0;
 349                 blocks[i].d[1] = BSWAP4(ctx->B[i]);     ctx->B[i] = key->tail.h1;
 350                 blocks[i].d[2] = BSWAP4(ctx->C[i]);     ctx->C[i] = key->tail.h2;
 351                 blocks[i].d[3] = BSWAP4(ctx->D[i]);     ctx->D[i] = key->tail.h3;
 352                 blocks[i].d[4] = BSWAP4(ctx->E[i]);     ctx->E[i] = key->tail.h4;
 353                 blocks[i].c[20] = 0x80;
 354                 blocks[i].d[15] = BSWAP4((64+20)*8);
 355                 edges[i].ptr = blocks[i].c;
 356                 edges[i].blocks = 1;
 357         }
 358
 359         /* finalize MACs */
 360         sha1_multi_block(ctx,edges,n4x);
 361
 362         for (i=0;i<x4;i++) {
 363                 unsigned int len = (i==(x4-1)?last:frag), pad, j;
 364                 unsigned char *out0 = out;
 365
 366                 memcpy(ciph_d[i].out,ciph_d[i].inp,len-processed);
 367                 ciph_d[i].inp = ciph_d[i].out;
 368
 369                 out += 5+16+len;
 370
 371                 /* write MAC */
 372                 ((u32 *)out)[0] = BSWAP4(ctx->A[i]);
 373                 ((u32 *)out)[1] = BSWAP4(ctx->B[i]);
 374                 ((u32 *)out)[2] = BSWAP4(ctx->C[i]);
 375                 ((u32 *)out)[3] = BSWAP4(ctx->D[i]);
 376                 ((u32 *)out)[4] = BSWAP4(ctx->E[i]);
 377                 out += 20;
 378                 len += 20;
 379
 380                 /* pad */
 381                 pad = 15-len%16;
 382                 for (j=0;j<=pad;j++) *(out++) = pad;
 383                 len += pad+1;
 384
 385                 ciph_d[i].blocks = (len-processed)/16;
 386                 len += 16;      /* account for explicit iv */
 387
 388                 /* arrange header */
 389                 out0[0] = ((u8*)key->md.data)[8];
 390                 out0[1] = ((u8*)key->md.data)[9];
 391                 out0[2] = ((u8*)key->md.data)[10];
 392                 out0[3] = (u8)(len>>8);
 393                 out0[4] = (u8)(len);
 394
 395                 ret += len+5;
 396                 inp += frag;
 397         }
 398
 399         aesni_multi_cbc_encrypt(ciph_d,&key->ks,n4x);
 400
 401         OPENSSL_cleanse(blocks,sizeof(blocks));
 402         OPENSSL_cleanse(ctx,sizeof(*ctx));
 403
 404         return ret;
 405 }
 406 #endif
 407
 408 static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 409                       const unsigned char *in, size_t len)
 410         {
 411         EVP_AES_HMAC_SHA1 *key = data(ctx);
 412         unsigned int l;
 413         size_t  plen = key->payload_length,
 414                 iv = 0,         /* explicit IV in TLS 1.1 and later */
 415                 sha_off = 0;
 416 #if defined(STITCHED_CALL)
 417         size_t  aes_off = 0,
 418                 blocks;
 419
 420         sha_off = SHA_CBLOCK-key->md.num;
 421 #endif
 422
 423         key->payload_length = NO_PAYLOAD_LENGTH;
 424
 425         if (len%AES_BLOCK_SIZE) return 0;
 426
 427         if (ctx->encrypt) {
 428                 if (plen==NO_PAYLOAD_LENGTH)
 429                         plen = len;
 430                 else if (len!=((plen+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE))
 431                         return 0;
 432                 else if (key->aux.tls_ver >= TLS1_1_VERSION)
 433                         iv = AES_BLOCK_SIZE;
 434
 435 #if defined(STITCHED_CALL)
 436                 if (plen>(sha_off+iv) && (blocks=(plen-(sha_off+iv))/SHA_CBLOCK)) {
 437                         SHA1_Update(&key->md,in+iv,sha_off);
 438
 439                         aesni_cbc_sha1_enc(in,out,blocks,&key->ks,
 440                                 ctx->iv,&key->md,in+iv+sha_off);
 441                         blocks *= SHA_CBLOCK;
 442                         aes_off += blocks;
 443                         sha_off += blocks;
 444                         key->md.Nh += blocks>>29;
 445                         key->md.Nl += blocks<<=3;
 446                         if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
 447                 } else {
 448                         sha_off = 0;
 449                 }
 450 #endif
 451                 sha_off += iv;
 452                 SHA1_Update(&key->md,in+sha_off,plen-sha_off);
 453
 454                 if (plen!=len)  {       /* "TLS" mode of operation */
 455                         if (in!=out)
 456                                 memcpy(out+aes_off,in+aes_off,plen-aes_off);
 457
 458                         /* calculate HMAC and append it to payload */
 459                         SHA1_Final(out+plen,&key->md);
 460                         key->md = key->tail;
 461                         SHA1_Update(&key->md,out+plen,SHA_DIGEST_LENGTH);
 462                         SHA1_Final(out+plen,&key->md);
 463
 464                         /* pad the payload|hmac */
 465                         plen += SHA_DIGEST_LENGTH;
 466                         for (l=len-plen-1;plen<len;plen++) out[plen]=l;
 467                         /* encrypt HMAC|padding at once */
 468                         aesni_cbc_encrypt(out+aes_off,out+aes_off,len-aes_off,
 469                                         &key->ks,ctx->iv,1);
 470                 } else {
 471                         aesni_cbc_encrypt(in+aes_off,out+aes_off,len-aes_off,
 472                                         &key->ks,ctx->iv,1);
 473                 }
 474         } else {
 475                 union { unsigned int  u[SHA_DIGEST_LENGTH/sizeof(unsigned int)];
 476                         unsigned char c[32+SHA_DIGEST_LENGTH]; } mac, *pmac;
 477
 478                 /* arrange cache line alignment */
 479                 pmac = (void *)(((size_t)mac.c+31)&((size_t)0-32));
 480
 481                 if (plen != NO_PAYLOAD_LENGTH) {        /* "TLS" mode of operation */
 482                         size_t inp_len, mask, j, i;
 483                         unsigned int res, maxpad, pad, bitlen;
 484                         int ret = 1;
 485                         union { unsigned int  u[SHA_LBLOCK];
 486                                 unsigned char c[SHA_CBLOCK]; }
 487                                 *data = (void *)key->md.data;
 488 #if defined(STITCHED_DECRYPT_CALL)
 489                         unsigned char tail_iv[AES_BLOCK_SIZE];
 490                         int stitch=0;
 491 #endif
 492
 493                         if ((key->aux.tls_aad[plen-4]<<8|key->aux.tls_aad[plen-3])
 494                             >= TLS1_1_VERSION) {
 495                                 if (len<(AES_BLOCK_SIZE+SHA_DIGEST_LENGTH+1))
 496                                         return 0;
 497
 498                                 /* omit explicit iv */
 499                                 memcpy(ctx->iv,in,AES_BLOCK_SIZE);
 500                                 in  += AES_BLOCK_SIZE;
 501                                 out += AES_BLOCK_SIZE;
 502                                 len -= AES_BLOCK_SIZE;
 503                         }
 504                         else if (len<(SHA_DIGEST_LENGTH+1))
 505                                 return 0;
 506
 507 #if defined(STITCHED_DECRYPT_CALL)
 508                         if (len>=1024 && ctx->key_len==32) {
 509                                 /* decrypt last block */
 510                                 memcpy(tail_iv,in+len-2*AES_BLOCK_SIZE,AES_BLOCK_SIZE);
 511                                 aesni_cbc_encrypt(in+len-AES_BLOCK_SIZE,
 512                                                 out+len-AES_BLOCK_SIZE,AES_BLOCK_SIZE,
 513                                                 &key->ks,tail_iv,0);
 514                                 stitch=1;
 515                         } else
 516 #endif
 517                         /* decrypt HMAC|padding at once */
 518                         aesni_cbc_encrypt(in,out,len,
 519                                         &key->ks,ctx->iv,0);
 520
 521                         /* figure out payload length */
 522                         pad = out[len-1];
 523                         maxpad = len-(SHA_DIGEST_LENGTH+1);
 524                         maxpad |= (255-maxpad)>>(sizeof(maxpad)*8-8);
 525                         maxpad &= 255;
 526
 527                         inp_len = len - (SHA_DIGEST_LENGTH+pad+1);
 528                         mask = (0-((inp_len-len)>>(sizeof(inp_len)*8-1)));
 529                         inp_len &= mask;
 530                         ret &= (int)mask;
 531
 532                         key->aux.tls_aad[plen-2] = inp_len>>8;
 533                         key->aux.tls_aad[plen-1] = inp_len;
 534
 535                         /* calculate HMAC */
 536                         key->md = key->head;
 537                         SHA1_Update(&key->md,key->aux.tls_aad,plen);
 538
 539 #if defined(STITCHED_DECRYPT_CALL)
 540                         if (stitch) {
 541                                 blocks = (len-(256+32+SHA_CBLOCK))/SHA_CBLOCK;
 542                                 aes_off = len-AES_BLOCK_SIZE-blocks*SHA_CBLOCK;
 543                                 sha_off = SHA_CBLOCK-plen;
 544
 545                                 aesni_cbc_encrypt(in,out,aes_off,
 546                                         &key->ks,ctx->iv,0);
 547
 548                                 SHA1_Update(&key->md,out,sha_off);
 549                                 aesni256_cbc_sha1_dec(in+aes_off,
 550                                         out+aes_off,blocks,&key->ks,ctx->iv,
 551                                         &key->md,out+sha_off);
 552
 553                                 sha_off += blocks*=SHA_CBLOCK;
 554                                 out += sha_off;
 555                                 len -= sha_off;
 556                                 inp_len -= sha_off;
 557
 558                                 key->md.Nl += (blocks<<3);      /* at most 18 bits */
 559                                 memcpy(ctx->iv,tail_iv,AES_BLOCK_SIZE);
 560                         }
 561 #endif
 562
 563 #if 1
 564                         len -= SHA_DIGEST_LENGTH;               /* amend mac */
 565                         if (len>=(256+SHA_CBLOCK)) {
 566                                 j = (len-(256+SHA_CBLOCK))&(0-SHA_CBLOCK);
 567                                 j += SHA_CBLOCK-key->md.num;
 568                                 SHA1_Update(&key->md,out,j);
 569                                 out += j;
 570                                 len -= j;
 571                                 inp_len -= j;
 572                         }
 573
 574                         /* but pretend as if we hashed padded payload */
 575                         bitlen = key->md.Nl+(inp_len<<3);       /* at most 18 bits */
 576 #ifdef BSWAP4
 577                         bitlen = BSWAP4(bitlen);
 578 #else
 579                         mac.c[0] = 0;
 580                         mac.c[1] = (unsigned char)(bitlen>>16);
 581                         mac.c[2] = (unsigned char)(bitlen>>8);
 582                         mac.c[3] = (unsigned char)bitlen;
 583                         bitlen = mac.u[0];
 584 #endif
 585
 586                         pmac->u[0]=0;
 587                         pmac->u[1]=0;
 588                         pmac->u[2]=0;
 589                         pmac->u[3]=0;
 590                         pmac->u[4]=0;
 591
 592                         for (res=key->md.num, j=0;j<len;j++) {
 593                                 size_t c = out[j];
 594                                 mask = (j-inp_len)>>(sizeof(j)*8-8);
 595                                 c &= mask;
 596                                 c |= 0x80&~mask&~((inp_len-j)>>(sizeof(j)*8-8));
 597                                 data->c[res++]=(unsigned char)c;
 598
 599                                 if (res!=SHA_CBLOCK) continue;
 600
 601                                 /* j is not incremented yet */
 602                                 mask = 0-((inp_len+7-j)>>(sizeof(j)*8-1));
 603                                 data->u[SHA_LBLOCK-1] |= bitlen&mask;
 604                                 sha1_block_data_order(&key->md,data,1);
 605                                 mask &= 0-((j-inp_len-72)>>(sizeof(j)*8-1));
 606                                 pmac->u[0] |= key->md.h0 & mask;
 607                                 pmac->u[1] |= key->md.h1 & mask;
 608                                 pmac->u[2] |= key->md.h2 & mask;
 609                                 pmac->u[3] |= key->md.h3 & mask;
 610                                 pmac->u[4] |= key->md.h4 & mask;
 611                                 res=0;
 612                         }
 613
 614                         for(i=res;i<SHA_CBLOCK;i++,j++) data->c[i]=0;
 615
 616                         if (res>SHA_CBLOCK-8) {
 617                                 mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
 618                                 data->u[SHA_LBLOCK-1] |= bitlen&mask;
 619                                 sha1_block_data_order(&key->md,data,1);
 620                                 mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
 621                                 pmac->u[0] |= key->md.h0 & mask;
 622                                 pmac->u[1] |= key->md.h1 & mask;
 623                                 pmac->u[2] |= key->md.h2 & mask;
 624                                 pmac->u[3] |= key->md.h3 & mask;
 625                                 pmac->u[4] |= key->md.h4 & mask;
 626
 627                                 memset(data,0,SHA_CBLOCK);
 628                                 j+=64;
 629                         }
 630                         data->u[SHA_LBLOCK-1] = bitlen;
 631                         sha1_block_data_order(&key->md,data,1);
 632                         mask = 0-((j-inp_len-73)>>(sizeof(j)*8-1));
 633                         pmac->u[0] |= key->md.h0 & mask;
 634                         pmac->u[1] |= key->md.h1 & mask;
 635                         pmac->u[2] |= key->md.h2 & mask;
 636                         pmac->u[3] |= key->md.h3 & mask;
 637                         pmac->u[4] |= key->md.h4 & mask;
 638
 639 #ifdef BSWAP4
 640                         pmac->u[0] = BSWAP4(pmac->u[0]);
 641                         pmac->u[1] = BSWAP4(pmac->u[1]);
 642                         pmac->u[2] = BSWAP4(pmac->u[2]);
 643                         pmac->u[3] = BSWAP4(pmac->u[3]);
 644                         pmac->u[4] = BSWAP4(pmac->u[4]);
 645 #else
 646                         for (i=0;i<5;i++) {
 647                                 res = pmac->u[i];
 648                                 pmac->c[4*i+0]=(unsigned char)(res>>24);
 649                                 pmac->c[4*i+1]=(unsigned char)(res>>16);
 650                                 pmac->c[4*i+2]=(unsigned char)(res>>8);
 651                                 pmac->c[4*i+3]=(unsigned char)res;
 652                         }
 653 #endif
 654                         len += SHA_DIGEST_LENGTH;
 655 #else
 656                         SHA1_Update(&key->md,out,inp_len);
 657                         res = key->md.num;
 658                         SHA1_Final(pmac->c,&key->md);
 659
 660                         {
 661                         unsigned int inp_blocks, pad_blocks;
 662
 663                         /* but pretend as if we hashed padded payload */
 664                         inp_blocks = 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
 665                         res += (unsigned int)(len-inp_len);
 666                         pad_blocks = res / SHA_CBLOCK;
 667                         res %= SHA_CBLOCK;
 668                         pad_blocks += 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1));
 669                         for (;inp_blocks<pad_blocks;inp_blocks++)
 670                                 sha1_block_data_order(&key->md,data,1);
 671                         }
 672 #endif
 673                         key->md = key->tail;
 674                         SHA1_Update(&key->md,pmac->c,SHA_DIGEST_LENGTH);
 675                         SHA1_Final(pmac->c,&key->md);
 676
 677                         /* verify HMAC */
 678                         out += inp_len;
 679                         len -= inp_len;
 680 #if 1
 681                         {
 682                         unsigned char *p = out+len-1-maxpad-SHA_DIGEST_LENGTH;
 683                         size_t off = out-p;
 684                         unsigned int c, cmask;
 685
 686                         maxpad += SHA_DIGEST_LENGTH;
 687                         for (res=0,i=0,j=0;j<maxpad;j++) {
 688                                 c = p[j];
 689                                 cmask = ((int)(j-off-SHA_DIGEST_LENGTH))>>(sizeof(int)*8-1);
 690                                 res |= (c^pad)&~cmask;  /* ... and padding */
 691                                 cmask &= ((int)(off-1-j))>>(sizeof(int)*8-1);
 692                                 res |= (c^pmac->c[i])&cmask;
 693                                 i += 1&cmask;
 694                         }
 695                         maxpad -= SHA_DIGEST_LENGTH;
 696
 697                         res = 0-((0-res)>>(sizeof(res)*8-1));
 698                         ret &= (int)~res;
 699                         }
 700 #else
 701                         for (res=0,i=0;i<SHA_DIGEST_LENGTH;i++)
 702                                 res |= out[i]^pmac->c[i];
 703                         res = 0-((0-res)>>(sizeof(res)*8-1));
 704                         ret &= (int)~res;
 705
 706                         /* verify padding */
 707                         pad = (pad&~res) | (maxpad&res);
 708                         out = out+len-1-pad;
 709                         for (res=0,i=0;i<pad;i++)
 710                                 res |= out[i]^pad;
 711
 712                         res = (0-res)>>(sizeof(res)*8-1);
 713                         ret &= (int)~res;
 714 #endif
 715                         return ret;
 716                 } else {
 717 #if defined(STITCHED_DECRYPT_CALL)
 718                         if (len>=1024 && ctx->key_len==32) {
 719                                 if (sha_off%=SHA_CBLOCK)
 720                                         blocks = (len-3*SHA_CBLOCK)/SHA_CBLOCK;
 721                                 else
 722                                         blocks = (len-2*SHA_CBLOCK)/SHA_CBLOCK;
 723                                 aes_off = len-blocks*SHA_CBLOCK;
 724
 725                                 aesni_cbc_encrypt(in,out,aes_off,
 726                                         &key->ks,ctx->iv,0);
 727                                 SHA1_Update(&key->md,out,sha_off);
 728                                 aesni256_cbc_sha1_dec(in+aes_off,
 729                                         out+aes_off,blocks,&key->ks,ctx->iv,
 730                                         &key->md,out+sha_off);
 731
 732                                 sha_off += blocks*=SHA_CBLOCK;
 733                                 out += sha_off;
 734                                 len -= sha_off;
 735
 736                                 key->md.Nh += blocks>>29;
 737                                 key->md.Nl += blocks<<=3;
 738                                 if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
 739                         } else
 740 #endif
 741                         /* decrypt HMAC|padding at once */
 742                         aesni_cbc_encrypt(in,out,len,
 743                                         &key->ks,ctx->iv,0);
 744
 745                         SHA1_Update(&key->md,out,len);
 746                 }
 747         }
 748
 749         return 1;
 750         }
 751
 752 static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
 753         {
 754         EVP_AES_HMAC_SHA1 *key = data(ctx);
 755
 756         switch (type)
 757                 {
 758         case EVP_CTRL_AEAD_SET_MAC_KEY:
 759                 {
 760                 unsigned int  i;
 761                 unsigned char hmac_key[64];
 762
 763                 memset (hmac_key,0,sizeof(hmac_key));
 764
 765                 if (arg > (int)sizeof(hmac_key)) {
 766                         SHA1_Init(&key->head);
 767                         SHA1_Update(&key->head,ptr,arg);
 768                         SHA1_Final(hmac_key,&key->head);
 769                 } else {
 770                         memcpy(hmac_key,ptr,arg);
 771                 }
 772
 773                 for (i=0;i<sizeof(hmac_key);i++)
 774                         hmac_key[i] ^= 0x36;            /* ipad */
 775                 SHA1_Init(&key->head);
 776                 SHA1_Update(&key->head,hmac_key,sizeof(hmac_key));
 777
 778                 for (i=0;i<sizeof(hmac_key);i++)
 779                         hmac_key[i] ^= 0x36^0x5c;       /* opad */
 780                 SHA1_Init(&key->tail);
 781                 SHA1_Update(&key->tail,hmac_key,sizeof(hmac_key));
 782
 783                 OPENSSL_cleanse(hmac_key,sizeof(hmac_key));
 784
 785                 return 1;
 786                 }
 787         case EVP_CTRL_AEAD_TLS1_AAD:
 788                 {
 789                 unsigned char *p=ptr;
 790                 unsigned int   len=p[arg-2]<<8|p[arg-1];
 791
 792                 if (ctx->encrypt)
 793                         {
 794                         key->payload_length = len;
 795                         if ((key->aux.tls_ver=p[arg-4]<<8|p[arg-3]) >= TLS1_1_VERSION) {
 796                                 len -= AES_BLOCK_SIZE;
 797                                 p[arg-2] = len>>8;
 798                                 p[arg-1] = len;
 799                         }
 800                         key->md = key->head;
 801                         SHA1_Update(&key->md,p,arg);
 802
 803                         return (int)(((len+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE)
 804                                 - len);
 805                         }
 806                 else
 807                         {
 808                         if (arg>13) arg = 13;
 809                         memcpy(key->aux.tls_aad,ptr,arg);
 810                         key->payload_length = arg;
 811
 812                         return SHA_DIGEST_LENGTH;
 813                         }
 814                 }
 815 #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
 816         case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
 817                 return (int)(5+16+((arg+20+16)&-16));
 818         case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
 819                 {
 820                 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
 821                         (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
 822                 unsigned int n4x=1, x4;
 823                 unsigned int frag, last, packlen, inp_len;
 824
 825                 if (arg<sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) return -1;
 826
 827                 inp_len = param->inp[11]<<8|param->inp[12];
 828
 829                 if (ctx->encrypt)
 830                         {
 831                         if ((param->inp[9]<<8|param->inp[10]) < TLS1_1_VERSION)
 832                                 return -1;
 833
 834                         if (inp_len)
 835                                 {
 836                                 if (inp_len<4096) return 0;     /* too short */
 837
 838                                 if (inp_len>=8192 && OPENSSL_ia32cap_P[2]&(1<<5))
 839                                         n4x=2;  /* AVX2 */
 840                                 }
 841                         else if ((n4x=param->interleave/4) && n4x<=2)
 842                                 inp_len = param->len;
 843                         else
 844                                 return -1;
 845
 846                         key->md = key->head;
 847                         SHA1_Update(&key->md,param->inp,13);
 848
 849                         x4 = 4*n4x; n4x += 1;
 850
 851                         frag = inp_len>>n4x;
 852                         last = inp_len+frag-(frag<<n4x);
 853                         if (last>frag && ((last+13+9)%64<(x4-1))) {
 854                                 frag++;
 855                                 last -= x4-1;
 856                         }
 857
 858                         packlen = 5+16+((frag+20+16)&-16);
 859                         packlen = (packlen<<n4x)-packlen;
 860                         packlen += 5+16+((last+20+16)&-16);
 861
 862                         param->interleave = x4;
 863
 864                         return (int)packlen;
 865                         }
 866                 else
 867                         return -1;      /* not yet */
 868                 }
 869         case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
 870                 {
 871                 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
 872                         (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
 873
 874                 return (int)tls1_1_multi_block_encrypt(key,param->out,param->inp,
 875                                                 param->len,param->interleave/4);
 876                 }
 877         case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
 878 #endif
 879         default:
 880                 return -1;
 881                 }
 882         }
 883
 884 static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher =
 885         {
 886 #ifdef NID_aes_128_cbc_hmac_sha1
 887         NID_aes_128_cbc_hmac_sha1,
 888 #else
 889         NID_undef,
 890 #endif
 891         16,16,16,
 892         EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|
 893         EVP_CIPH_FLAG_AEAD_CIPHER|EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
 894         aesni_cbc_hmac_sha1_init_key,
 895         aesni_cbc_hmac_sha1_cipher,
 896         NULL,
 897         sizeof(EVP_AES_HMAC_SHA1),
 898         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
 899         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
 900         aesni_cbc_hmac_sha1_ctrl,
 901         NULL
 902         };
 903
 904 static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher =
 905         {
 906 #ifdef NID_aes_256_cbc_hmac_sha1
 907         NID_aes_256_cbc_hmac_sha1,
 908 #else
 909         NID_undef,
 910 #endif
 911         16,32,16,
 912         EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|
 913         EVP_CIPH_FLAG_AEAD_CIPHER|EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
 914         aesni_cbc_hmac_sha1_init_key,
 915         aesni_cbc_hmac_sha1_cipher,
 916         NULL,
 917         sizeof(EVP_AES_HMAC_SHA1),
 918         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
 919         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
 920         aesni_cbc_hmac_sha1_ctrl,
 921         NULL
 922         };
 923
 924 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
 925         {
 926         return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
 927                 &aesni_128_cbc_hmac_sha1_cipher:NULL);
 928         }
 929
 930 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
 931         {
 932         return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE?
 933                 &aesni_256_cbc_hmac_sha1_cipher:NULL);
 934         }
 935 #else
 936 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
 937         {
 938         return NULL;
 939         }
 940 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
 941         {
 942         return NULL;
 943         }
 944 #endif
 945 #endif