crypto/evp/e_aes_cbc_hmac_sha256.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_SHA256)
  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     SHA256_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_SHA256;
  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 int aesni_cbc_sha256_enc (const void *inp, void *out, size_t blocks,
 113                 const AES_KEY *key, unsigned char iv[16],
 114                 SHA256_CTX *ctx,const void *in0);
 115
 116 #define data(ctx) ((EVP_AES_HMAC_SHA256 *)(ctx)->cipher_data)
 117
 118 static int aesni_cbc_hmac_sha256_init_key(EVP_CIPHER_CTX *ctx,
 119                         const unsigned char *inkey,
 120                         const unsigned char *iv, int enc)
 121         {
 122         EVP_AES_HMAC_SHA256 *key = data(ctx);
 123         int ret;
 124
 125         if (enc)
 126                 memset(&key->ks,0,sizeof(key->ks.rd_key)),
 127                 ret=aesni_set_encrypt_key(inkey,ctx->key_len*8,&key->ks);
 128         else
 129                 ret=aesni_set_decrypt_key(inkey,ctx->key_len*8,&key->ks);
 130
 131         SHA256_Init(&key->head);        /* handy when benchmarking */
 132         key->tail = key->head;
 133         key->md   = key->head;
 134
 135         key->payload_length = NO_PAYLOAD_LENGTH;
 136
 137         return ret<0?0:1;
 138         }
 139
 140 #define STITCHED_CALL
 141
 142 #if !defined(STITCHED_CALL)
 143 #define aes_off 0
 144 #endif
 145
 146 void sha256_block_data_order (void *c,const void *p,size_t len);
 147
 148 static void sha256_update(SHA256_CTX *c,const void *data,size_t len)
 149 {       const unsigned char *ptr = data;
 150         size_t res;
 151
 152         if ((res = c->num)) {
 153                 res = SHA256_CBLOCK-res;
 154                 if (len<res) res=len;
 155                 SHA256_Update (c,ptr,res);
 156                 ptr += res;
 157                 len -= res;
 158         }
 159
 160         res = len % SHA256_CBLOCK;
 161         len -= res;
 162
 163         if (len) {
 164                 sha256_block_data_order(c,ptr,len/SHA256_CBLOCK);
 165
 166                 ptr += len;
 167                 c->Nh += len>>29;
 168                 c->Nl += len<<=3;
 169                 if (c->Nl<(unsigned int)len) c->Nh++;
 170         }
 171
 172         if (res)
 173                 SHA256_Update(c,ptr,res);
 174 }
 175
 176 #ifdef SHA256_Update
 177 #undef SHA256_Update
 178 #endif
 179 #define SHA256_Update sha256_update
 180
 181 #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
 182
 183 typedef struct { unsigned int A[8],B[8],C[8],D[8],E[8],F[8],G[8],H[8]; } SHA256_MB_CTX;
 184 typedef struct { const unsigned char *ptr; int blocks;  } HASH_DESC;
 185
 186 void sha256_multi_block(SHA256_MB_CTX *,const HASH_DESC *,int);
 187
 188 typedef struct { const unsigned char *inp; unsigned char *out;
 189                  int blocks; u64 iv[2]; } CIPH_DESC;
 190
 191 void aesni_multi_cbc_encrypt(CIPH_DESC *,void *,int);
 192
 193 static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA256 *key,
 194         unsigned char *out, const unsigned char *inp, size_t inp_len,
 195         int n4x)        /* n4x is 1 or 2 */
 196 {
 197         HASH_DESC       hash_d[8], edges[8];
 198         CIPH_DESC       ciph_d[8];
 199         unsigned char   storage[sizeof(SHA256_MB_CTX)+32];
 200         union { u64     q[16];
 201                 u32     d[32];
 202                 u8      c[128]; } blocks[8];
 203         SHA256_MB_CTX   *ctx;
 204         unsigned int    frag, last, packlen, i, x4=4*n4x;
 205         size_t          ret = 0;
 206         u8              *IVs;
 207
 208         ctx = (SHA256_MB_CTX *)(storage+32-((size_t)storage%32));       /* align */
 209
 210         frag = (unsigned int)inp_len>>(1+n4x);
 211         last = (unsigned int)inp_len+frag-(frag<<(1+n4x));
 212         if (last>frag && ((last+13+9)%64)<(x4-1)) {
 213                 frag++;
 214                 last -= x4-1;
 215         }
 216
 217         hash_d[0].ptr = inp;
 218         for (i=1;i<x4;i++)      hash_d[i].ptr = hash_d[i-1].ptr+frag;
 219
 220         for (i=0;i<x4;i++) {
 221                 unsigned int len = (i==(x4-1)?last:frag);
 222
 223                 ctx->A[i] = key->md.h[0];
 224                 ctx->B[i] = key->md.h[1];
 225                 ctx->C[i] = key->md.h[2];
 226                 ctx->D[i] = key->md.h[3];
 227                 ctx->E[i] = key->md.h[4];
 228                 ctx->F[i] = key->md.h[5];
 229                 ctx->G[i] = key->md.h[6];
 230                 ctx->H[i] = key->md.h[7];
 231
 232                 /* fix seqnum */
 233 #if defined(BSWAP8)
 234                 blocks[i].q[0] = BSWAP8(BSWAP8(*(u64*)key->md.data)+i);
 235 #else
 236                 blocks[i].c[7] += ((u8*)key->md.data)[7]+i;
 237                 if (blocks[i].c[7] < i) {
 238                         int j;
 239
 240                         for (j=6;j>=0;j--) {
 241                                 if (blocks[i].c[j]=((u8*)key->md.data)[j]+1) break;
 242                         }
 243                 }
 244 #endif
 245                 blocks[i].c[8] = ((u8*)key->md.data)[8];
 246                 blocks[i].c[9] = ((u8*)key->md.data)[9];
 247                 blocks[i].c[10] = ((u8*)key->md.data)[10];
 248                 /* fix length */
 249                 blocks[i].c[11] = (u8)(len>>8);
 250                 blocks[i].c[12] = (u8)(len);
 251
 252                 memcpy(blocks[i].c+13,hash_d[i].ptr,64-13);
 253                 hash_d[i].ptr += 64-13;
 254                 hash_d[i].blocks = (len-(64-13))/64;
 255
 256                 edges[i].ptr = blocks[i].c;
 257                 edges[i].blocks = 1;
 258         }
 259
 260         /* hash 13-byte headers and first 64-13 bytes of inputs */
 261         sha256_multi_block(ctx,edges,n4x);
 262         /* hash bulk inputs */
 263         sha256_multi_block(ctx,hash_d,n4x);
 264
 265         memset(blocks,0,sizeof(blocks));
 266         for (i=0;i<x4;i++) {
 267                 unsigned int            len = (i==(x4-1)?last:frag),
 268                                         off = hash_d[i].blocks*64;
 269                 const unsigned char    *ptr = hash_d[i].ptr+off;
 270
 271                 off = len-(64-13)-off;  /* remainder actually */
 272                 memcpy(blocks[i].c,ptr,off);
 273                 blocks[i].c[off]=0x80;
 274                 len += 64+13;           /* 64 is HMAC header */
 275                 len *= 8;               /* convert to bits */
 276                 if (off<(64-8)) {
 277                         blocks[i].d[15] = BSWAP4(len);
 278                         edges[i].blocks = 1;
 279                 } else {
 280                         blocks[i].d[31] = BSWAP4(len);
 281                         edges[i].blocks = 2;
 282                 }
 283                 edges[i].ptr = blocks[i].c;
 284         }
 285
 286         /* hash input tails and finalize */
 287         sha256_multi_block(ctx,edges,n4x);
 288
 289         memset(blocks,0,sizeof(blocks));
 290         for (i=0;i<x4;i++) {
 291                 blocks[i].d[0] = BSWAP4(ctx->A[i]);     ctx->A[i] = key->tail.h[0];
 292                 blocks[i].d[1] = BSWAP4(ctx->B[i]);     ctx->B[i] = key->tail.h[1];
 293                 blocks[i].d[2] = BSWAP4(ctx->C[i]);     ctx->C[i] = key->tail.h[2];
 294                 blocks[i].d[3] = BSWAP4(ctx->D[i]);     ctx->D[i] = key->tail.h[3];
 295                 blocks[i].d[4] = BSWAP4(ctx->E[i]);     ctx->E[i] = key->tail.h[4];
 296                 blocks[i].d[5] = BSWAP4(ctx->F[i]);     ctx->F[i] = key->tail.h[5];
 297                 blocks[i].d[6] = BSWAP4(ctx->G[i]);     ctx->G[i] = key->tail.h[6];
 298                 blocks[i].d[7] = BSWAP4(ctx->H[i]);     ctx->H[i] = key->tail.h[7];
 299                 blocks[i].c[32] = 0x80;
 300                 blocks[i].d[15] = BSWAP4((64+32)*8);
 301                 edges[i].ptr = blocks[i].c;
 302                 edges[i].blocks = 1;
 303         }
 304
 305         /* finalize MACs */
 306         sha256_multi_block(ctx,edges,n4x);
 307
 308         packlen = 5+16+((frag+32+16)&-16);
 309
 310         out += (packlen<<(1+n4x))-packlen;
 311         inp += (frag<<(1+n4x))-frag;
 312
 313         RAND_bytes((IVs=blocks[0].c),16*x4);    /* ask for IVs in bulk */
 314
 315         for (i=x4-1;;i--) {
 316                 unsigned int len = (i==(x4-1)?last:frag), pad, j;
 317                 unsigned char *out0 = out;
 318
 319                 out += 5+16;            /* place for header and explicit IV */
 320                 ciph_d[i].inp = out;
 321                 ciph_d[i].out = out;
 322
 323                 memmove(out,inp,len);
 324                 out += len;
 325
 326                 /* write MAC */
 327                 ((u32 *)out)[0] = BSWAP4(ctx->A[i]);
 328                 ((u32 *)out)[1] = BSWAP4(ctx->B[i]);
 329                 ((u32 *)out)[2] = BSWAP4(ctx->C[i]);
 330                 ((u32 *)out)[3] = BSWAP4(ctx->D[i]);
 331                 ((u32 *)out)[4] = BSWAP4(ctx->E[i]);
 332                 ((u32 *)out)[5] = BSWAP4(ctx->F[i]);
 333                 ((u32 *)out)[6] = BSWAP4(ctx->G[i]);
 334                 ((u32 *)out)[7] = BSWAP4(ctx->H[i]);
 335                 out += 32;
 336                 len += 32;
 337
 338                 /* pad */
 339                 pad = 15-len%16;
 340                 for (j=0;j<=pad;j++) *(out++) = pad;
 341                 len += pad+1;
 342
 343                 ciph_d[i].blocks = len/16;
 344                 len += 16;      /* account for explicit iv */
 345
 346                 /* arrange header */
 347                 out0[0] = ((u8*)key->md.data)[8];
 348                 out0[1] = ((u8*)key->md.data)[9];
 349                 out0[2] = ((u8*)key->md.data)[10];
 350                 out0[3] = (u8)(len>>8);
 351                 out0[4] = (u8)(len);
 352
 353                 /* explicit iv */
 354                 memcpy(ciph_d[i].iv, IVs, 16);
 355                 memcpy(&out0[5],     IVs, 16);
 356
 357                 ret += len+5;
 358
 359                 if (i==0) break;
 360
 361                 out = out0-packlen;
 362                 inp -= frag;
 363                 IVs += 16;
 364         }
 365
 366         aesni_multi_cbc_encrypt(ciph_d,&key->ks,n4x);
 367
 368         OPENSSL_cleanse(blocks,sizeof(blocks));
 369         OPENSSL_cleanse(ctx,sizeof(*ctx));
 370
 371         return ret;
 372 }
 373 #endif
 374
 375 static int aesni_cbc_hmac_sha256_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 376                       const unsigned char *in, size_t len)
 377         {
 378         EVP_AES_HMAC_SHA256 *key = data(ctx);
 379         unsigned int l;
 380         size_t  plen = key->payload_length,
 381                 iv = 0,         /* explicit IV in TLS 1.1 and later */
 382                 sha_off = 0;
 383 #if defined(STITCHED_CALL)
 384         size_t  aes_off = 0,
 385                 blocks;
 386
 387         sha_off = SHA256_CBLOCK-key->md.num;
 388 #endif
 389
 390         key->payload_length = NO_PAYLOAD_LENGTH;
 391
 392         if (len%AES_BLOCK_SIZE) return 0;
 393
 394         if (ctx->encrypt) {
 395                 if (plen==NO_PAYLOAD_LENGTH)
 396                         plen = len;
 397                 else if (len!=((plen+SHA256_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE))
 398                         return 0;
 399                 else if (key->aux.tls_ver >= TLS1_1_VERSION)
 400                         iv = AES_BLOCK_SIZE;
 401
 402 #if defined(STITCHED_CALL)
 403                 if (OPENSSL_ia32cap_P[1]&(1<<(60-32)) &&
 404                     plen>(sha_off+iv) &&
 405                     (blocks=(plen-(sha_off+iv))/SHA256_CBLOCK)) {
 406                         SHA256_Update(&key->md,in+iv,sha_off);
 407
 408                         (void)aesni_cbc_sha256_enc(in,out,blocks,&key->ks,
 409                                 ctx->iv,&key->md,in+iv+sha_off);
 410                         blocks *= SHA256_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                 SHA256_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                         SHA256_Final(out+plen,&key->md);
 429                         key->md = key->tail;
 430                         SHA256_Update(&key->md,out+plen,SHA256_DIGEST_LENGTH);
 431                         SHA256_Final(out+plen,&key->md);
 432
 433                         /* pad the payload|hmac */
 434                         plen += SHA256_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[SHA256_DIGEST_LENGTH/sizeof(unsigned int)];
 445                         unsigned char c[64+SHA256_DIGEST_LENGTH]; } mac, *pmac;
 446
 447                 /* arrange cache line alignment */
 448                 pmac = (void *)(((size_t)mac.c+63)&((size_t)0-64));
 449
 450                 /* decrypt HMAC|padding at once */
 451                 aesni_cbc_encrypt(in,out,len,
 452                                 &key->ks,ctx->iv,0);
 453
 454                 if (plen) {     /* "TLS" mode of operation */
 455                         size_t inp_len, mask, j, i;
 456                         unsigned int res, maxpad, pad, bitlen;
 457                         int ret = 1;
 458                         union { unsigned int  u[SHA_LBLOCK];
 459                                 unsigned char c[SHA256_CBLOCK]; }
 460                                 *data = (void *)key->md.data;
 461
 462                         if ((key->aux.tls_aad[plen-4]<<8|key->aux.tls_aad[plen-3])
 463                             >= TLS1_1_VERSION)
 464                                 iv = AES_BLOCK_SIZE;
 465
 466                         if (len<(iv+SHA256_DIGEST_LENGTH+1))
 467                                 return 0;
 468
 469                         /* omit explicit iv */
 470                         out += iv;
 471                         len -= iv;
 472
 473                         /* figure out payload length */
 474                         pad = out[len-1];
 475                         maxpad = len-(SHA256_DIGEST_LENGTH+1);
 476                         maxpad |= (255-maxpad)>>(sizeof(maxpad)*8-8);
 477                         maxpad &= 255;
 478
 479                         inp_len = len - (SHA256_DIGEST_LENGTH+pad+1);
 480                         mask = (0-((inp_len-len)>>(sizeof(inp_len)*8-1)));
 481                         inp_len &= mask;
 482                         ret &= (int)mask;
 483
 484                         key->aux.tls_aad[plen-2] = inp_len>>8;
 485                         key->aux.tls_aad[plen-1] = inp_len;
 486
 487                         /* calculate HMAC */
 488                         key->md = key->head;
 489                         SHA256_Update(&key->md,key->aux.tls_aad,plen);
 490
 491 #if 1
 492                         len -= SHA256_DIGEST_LENGTH;            /* amend mac */
 493                         if (len>=(256+SHA256_CBLOCK)) {
 494                                 j = (len-(256+SHA256_CBLOCK))&(0-SHA256_CBLOCK);
 495                                 j += SHA256_CBLOCK-key->md.num;
 496                                 SHA256_Update(&key->md,out,j);
 497                                 out += j;
 498                                 len -= j;
 499                                 inp_len -= j;
 500                         }
 501
 502                         /* but pretend as if we hashed padded payload */
 503                         bitlen = key->md.Nl+(inp_len<<3);       /* at most 18 bits */
 504 #ifdef BSWAP4
 505                         bitlen = BSWAP4(bitlen);
 506 #else
 507                         mac.c[0] = 0;
 508                         mac.c[1] = (unsigned char)(bitlen>>16);
 509                         mac.c[2] = (unsigned char)(bitlen>>8);
 510                         mac.c[3] = (unsigned char)bitlen;
 511                         bitlen = mac.u[0];
 512 #endif
 513
 514                         pmac->u[0]=0;
 515                         pmac->u[1]=0;
 516                         pmac->u[2]=0;
 517                         pmac->u[3]=0;
 518                         pmac->u[4]=0;
 519                         pmac->u[5]=0;
 520                         pmac->u[6]=0;
 521                         pmac->u[7]=0;
 522
 523                         for (res=key->md.num, j=0;j<len;j++) {
 524                                 size_t c = out[j];
 525                                 mask = (j-inp_len)>>(sizeof(j)*8-8);
 526                                 c &= mask;
 527                                 c |= 0x80&~mask&~((inp_len-j)>>(sizeof(j)*8-8));
 528                                 data->c[res++]=(unsigned char)c;
 529
 530                                 if (res!=SHA256_CBLOCK) continue;
 531
 532                                 /* j is not incremented yet */
 533                                 mask = 0-((inp_len+7-j)>>(sizeof(j)*8-1));
 534                                 data->u[SHA_LBLOCK-1] |= bitlen&mask;
 535                                 sha256_block_data_order(&key->md,data,1);
 536                                 mask &= 0-((j-inp_len-72)>>(sizeof(j)*8-1));
 537                                 pmac->u[0] |= key->md.h[0] & mask;
 538                                 pmac->u[1] |= key->md.h[1] & mask;
 539                                 pmac->u[2] |= key->md.h[2] & mask;
 540                                 pmac->u[3] |= key->md.h[3] & mask;
 541                                 pmac->u[4] |= key->md.h[4] & mask;
 542                                 pmac->u[5] |= key->md.h[5] & mask;
 543                                 pmac->u[6] |= key->md.h[6] & mask;
 544                                 pmac->u[7] |= key->md.h[7] & mask;
 545                                 res=0;
 546                         }
 547
 548                         for(i=res;i<SHA256_CBLOCK;i++,j++) data->c[i]=0;
 549
 550                         if (res>SHA256_CBLOCK-8) {
 551                                 mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
 552                                 data->u[SHA_LBLOCK-1] |= bitlen&mask;
 553                                 sha256_block_data_order(&key->md,data,1);
 554                                 mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
 555                                 pmac->u[0] |= key->md.h[0] & mask;
 556                                 pmac->u[1] |= key->md.h[1] & mask;
 557                                 pmac->u[2] |= key->md.h[2] & mask;
 558                                 pmac->u[3] |= key->md.h[3] & mask;
 559                                 pmac->u[4] |= key->md.h[4] & mask;
 560                                 pmac->u[5] |= key->md.h[5] & mask;
 561                                 pmac->u[6] |= key->md.h[6] & mask;
 562                                 pmac->u[7] |= key->md.h[7] & mask;
 563
 564                                 memset(data,0,SHA256_CBLOCK);
 565                                 j+=64;
 566                         }
 567                         data->u[SHA_LBLOCK-1] = bitlen;
 568                         sha256_block_data_order(&key->md,data,1);
 569                         mask = 0-((j-inp_len-73)>>(sizeof(j)*8-1));
 570                         pmac->u[0] |= key->md.h[0] & mask;
 571                         pmac->u[1] |= key->md.h[1] & mask;
 572                         pmac->u[2] |= key->md.h[2] & mask;
 573                         pmac->u[3] |= key->md.h[3] & mask;
 574                         pmac->u[4] |= key->md.h[4] & mask;
 575                         pmac->u[5] |= key->md.h[5] & mask;
 576                         pmac->u[6] |= key->md.h[6] & mask;
 577                         pmac->u[7] |= key->md.h[7] & mask;
 578
 579 #ifdef BSWAP4
 580                         pmac->u[0] = BSWAP4(pmac->u[0]);
 581                         pmac->u[1] = BSWAP4(pmac->u[1]);
 582                         pmac->u[2] = BSWAP4(pmac->u[2]);
 583                         pmac->u[3] = BSWAP4(pmac->u[3]);
 584                         pmac->u[4] = BSWAP4(pmac->u[4]);
 585                         pmac->u[5] = BSWAP4(pmac->u[5]);
 586                         pmac->u[6] = BSWAP4(pmac->u[6]);
 587                         pmac->u[7] = BSWAP4(pmac->u[7]);
 588 #else
 589                         for (i=0;i<8;i++) {
 590                                 res = pmac->u[i];
 591                                 pmac->c[4*i+0]=(unsigned char)(res>>24);
 592                                 pmac->c[4*i+1]=(unsigned char)(res>>16);
 593                                 pmac->c[4*i+2]=(unsigned char)(res>>8);
 594                                 pmac->c[4*i+3]=(unsigned char)res;
 595                         }
 596 #endif
 597                         len += SHA256_DIGEST_LENGTH;
 598 #else
 599                         SHA256_Update(&key->md,out,inp_len);
 600                         res = key->md.num;
 601                         SHA256_Final(pmac->c,&key->md);
 602
 603                         {
 604                         unsigned int inp_blocks, pad_blocks;
 605
 606                         /* but pretend as if we hashed padded payload */
 607                         inp_blocks = 1+((SHA256_CBLOCK-9-res)>>(sizeof(res)*8-1));
 608                         res += (unsigned int)(len-inp_len);
 609                         pad_blocks = res / SHA256_CBLOCK;
 610                         res %= SHA256_CBLOCK;
 611                         pad_blocks += 1+((SHA256_CBLOCK-9-res)>>(sizeof(res)*8-1));
 612                         for (;inp_blocks<pad_blocks;inp_blocks++)
 613                                 sha1_block_data_order(&key->md,data,1);
 614                         }
 615 #endif
 616                         key->md = key->tail;
 617                         SHA256_Update(&key->md,pmac->c,SHA256_DIGEST_LENGTH);
 618                         SHA256_Final(pmac->c,&key->md);
 619
 620                         /* verify HMAC */
 621                         out += inp_len;
 622                         len -= inp_len;
 623 #if 1
 624                         {
 625                         unsigned char *p = out+len-1-maxpad-SHA256_DIGEST_LENGTH;
 626                         size_t off = out-p;
 627                         unsigned int c, cmask;
 628
 629                         maxpad += SHA256_DIGEST_LENGTH;
 630                         for (res=0,i=0,j=0;j<maxpad;j++) {
 631                                 c = p[j];
 632                                 cmask = ((int)(j-off-SHA256_DIGEST_LENGTH))>>(sizeof(int)*8-1);
 633                                 res |= (c^pad)&~cmask;  /* ... and padding */
 634                                 cmask &= ((int)(off-1-j))>>(sizeof(int)*8-1);
 635                                 res |= (c^pmac->c[i])&cmask;
 636                                 i += 1&cmask;
 637                         }
 638                         maxpad -= SHA256_DIGEST_LENGTH;
 639
 640                         res = 0-((0-res)>>(sizeof(res)*8-1));
 641                         ret &= (int)~res;
 642                         }
 643 #else
 644                         for (res=0,i=0;i<SHA256_DIGEST_LENGTH;i++)
 645                                 res |= out[i]^pmac->c[i];
 646                         res = 0-((0-res)>>(sizeof(res)*8-1));
 647                         ret &= (int)~res;
 648
 649                         /* verify padding */
 650                         pad = (pad&~res) | (maxpad&res);
 651                         out = out+len-1-pad;
 652                         for (res=0,i=0;i<pad;i++)
 653                                 res |= out[i]^pad;
 654
 655                         res = (0-res)>>(sizeof(res)*8-1);
 656                         ret &= (int)~res;
 657 #endif
 658                         return ret;
 659                 } else {
 660                         SHA256_Update(&key->md,out,len);
 661                 }
 662         }
 663
 664         return 1;
 665         }
 666
 667 static int aesni_cbc_hmac_sha256_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
 668         {
 669         EVP_AES_HMAC_SHA256 *key = data(ctx);
 670
 671         switch (type)
 672                 {
 673         case EVP_CTRL_AEAD_SET_MAC_KEY:
 674                 {
 675                 unsigned int  i;
 676                 unsigned char hmac_key[64];
 677
 678                 memset (hmac_key,0,sizeof(hmac_key));
 679
 680                 if (arg > (int)sizeof(hmac_key)) {
 681                         SHA256_Init(&key->head);
 682                         SHA256_Update(&key->head,ptr,arg);
 683                         SHA256_Final(hmac_key,&key->head);
 684                 } else {
 685                         memcpy(hmac_key,ptr,arg);
 686                 }
 687
 688                 for (i=0;i<sizeof(hmac_key);i++)
 689                         hmac_key[i] ^= 0x36;            /* ipad */
 690                 SHA256_Init(&key->head);
 691                 SHA256_Update(&key->head,hmac_key,sizeof(hmac_key));
 692
 693                 for (i=0;i<sizeof(hmac_key);i++)
 694                         hmac_key[i] ^= 0x36^0x5c;       /* opad */
 695                 SHA256_Init(&key->tail);
 696                 SHA256_Update(&key->tail,hmac_key,sizeof(hmac_key));
 697
 698                 OPENSSL_cleanse(hmac_key,sizeof(hmac_key));
 699
 700                 return 1;
 701                 }
 702         case EVP_CTRL_AEAD_TLS1_AAD:
 703                 {
 704                 unsigned char *p=ptr;
 705                 unsigned int   len=p[arg-2]<<8|p[arg-1];
 706
 707                 if (ctx->encrypt)
 708                         {
 709                         key->payload_length = len;
 710                         if ((key->aux.tls_ver=p[arg-4]<<8|p[arg-3]) >= TLS1_1_VERSION) {
 711                                 len -= AES_BLOCK_SIZE;
 712                                 p[arg-2] = len>>8;
 713                                 p[arg-1] = len;
 714                         }
 715                         key->md = key->head;
 716                         SHA256_Update(&key->md,p,arg);
 717
 718                         return (int)(((len+SHA256_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE)
 719                                 - len);
 720                         }
 721                 else
 722                         {
 723                         if (arg>13) arg = 13;
 724                         memcpy(key->aux.tls_aad,ptr,arg);
 725                         key->payload_length = arg;
 726
 727                         return SHA256_DIGEST_LENGTH;
 728                         }
 729                 }
 730 #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
 731         case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
 732                 {
 733                 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
 734                         (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
 735                 unsigned int n4x=1, x4;
 736                 unsigned int frag, last, packlen, inp_len;
 737
 738                 if (arg<sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) return -1;
 739
 740                 inp_len = param->inp[11]<<8|param->inp[12];
 741
 742                 if (ctx->encrypt)
 743                         {
 744                         if ((param->inp[9]<<8|param->inp[10]) < TLS1_1_VERSION)
 745                                 return -1;
 746
 747                         if (inp_len<2048) return 0;     /* too short */
 748
 749                         if (OPENSSL_ia32cap_P[2]&(1<<5)) n4x=2; /* AVX2 */
 750
 751                         key->md = key->head;
 752                         SHA256_Update(&key->md,param->inp,13);
 753
 754                         x4 = 4*n4x; n4x += 1;
 755
 756                         frag = inp_len>>n4x;
 757                         last = inp_len+frag-(frag<<n4x);
 758                         if (last>frag && ((last+13+9)%64<(x4-1))) {
 759                                 frag++;
 760                                 last -= x4-1;
 761                         }
 762
 763                         packlen = 5+16+((frag+32+16)&-16);
 764                         packlen = (packlen<<n4x)-packlen;
 765                         packlen += 5+16+((last+32+16)&-16);
 766
 767                         param->interleave = x4;
 768
 769                         return (int)packlen;
 770                         }
 771                 else
 772                         return -1;      /* not yet */
 773                 }
 774         case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
 775                 {
 776                 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
 777                         (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
 778
 779                 return (int)tls1_1_multi_block_encrypt(key,param->out,param->inp,
 780                                                 param->len,param->interleave/4);
 781                 }
 782         case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
 783 #endif
 784         default:
 785                 return -1;
 786                 }
 787         }
 788
 789 static EVP_CIPHER aesni_128_cbc_hmac_sha256_cipher =
 790         {
 791 #ifdef NID_aes_128_cbc_hmac_sha256
 792         NID_aes_128_cbc_hmac_sha256,
 793 #else
 794         NID_undef,
 795 #endif
 796         16,16,16,
 797         EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|
 798         EVP_CIPH_FLAG_AEAD_CIPHER|EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
 799         aesni_cbc_hmac_sha256_init_key,
 800         aesni_cbc_hmac_sha256_cipher,
 801         NULL,
 802         sizeof(EVP_AES_HMAC_SHA256),
 803         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
 804         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
 805         aesni_cbc_hmac_sha256_ctrl,
 806         NULL
 807         };
 808
 809 static EVP_CIPHER aesni_256_cbc_hmac_sha256_cipher =
 810         {
 811 #ifdef NID_aes_256_cbc_hmac_sha256
 812         NID_aes_256_cbc_hmac_sha256,
 813 #else
 814         NID_undef,
 815 #endif
 816         16,32,16,
 817         EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|
 818         EVP_CIPH_FLAG_AEAD_CIPHER|EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
 819         aesni_cbc_hmac_sha256_init_key,
 820         aesni_cbc_hmac_sha256_cipher,
 821         NULL,
 822         sizeof(EVP_AES_HMAC_SHA256),
 823         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
 824         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
 825         aesni_cbc_hmac_sha256_ctrl,
 826         NULL
 827         };
 828
 829 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
 830         {
 831         return((OPENSSL_ia32cap_P[1]&AESNI_CAPABLE) &&
 832                 aesni_cbc_sha256_enc(NULL,NULL,0,NULL,NULL,NULL,NULL) ?
 833                 &aesni_128_cbc_hmac_sha256_cipher:NULL);
 834         }
 835
 836 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
 837         {
 838         return((OPENSSL_ia32cap_P[1]&AESNI_CAPABLE) &&
 839                 aesni_cbc_sha256_enc(NULL,NULL,0,NULL,NULL,NULL,NULL)?
 840                 &aesni_256_cbc_hmac_sha256_cipher:NULL);
 841         }
 842 #else
 843 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
 844         {
 845         return NULL;
 846         }
 847 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
 848         {
 849         return NULL;
 850         }
 851 #endif
 852 #endif