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_TLS11_MULTI_BLOCK)
  75 #define EVP_CIPH_FLAG_TLS11_MULTI_BLOCK 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 EVP_CIPH_FLAG_TLS11_MULTI_BLOCK
 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; double iv[2]; } CIPH_DESC;
 190
 191 void aesni_multi_cbc_encrypt(CIPH_DESC *,void *,int);
 192
 193 static size_t tls11_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
 207         ctx = (SHA256_MB_CTX *)(storage+32-((size_t)storage%32));       /* align */
 208
 209         frag = (unsigned int)inp_len>>(1+n4x);
 210         last = (unsigned int)inp_len+frag-(frag<<(1+n4x));
 211         if (last>frag && ((last+13+9)%64)<(x4-1)) {
 212                 frag++;
 213                 last -= x4-1;
 214         }
 215
 216         hash_d[0].ptr = inp;
 217         for (i=1;i<x4;i++)      hash_d[i].ptr = hash_d[i-1].ptr+frag;
 218
 219         for (i=0;i<x4;i++) {
 220                 unsigned int len = (i==(x4-1)?last:frag);
 221
 222                 ctx->A[i] = key->md.h[0];
 223                 ctx->B[i] = key->md.h[1];
 224                 ctx->C[i] = key->md.h[2];
 225                 ctx->D[i] = key->md.h[3];
 226                 ctx->E[i] = key->md.h[4];
 227                 ctx->F[i] = key->md.h[5];
 228                 ctx->G[i] = key->md.h[6];
 229                 ctx->H[i] = key->md.h[7];
 230
 231                 /* fix seqnum */
 232 #if defined(BSWAP8)
 233                 blocks[i].q[0] = BSWAP8(BSWAP8(*(u64*)key->md.data)+i);
 234 #else
 235                 blocks[i].c[7] += key->md.data[7]+i;
 236                 if (blocks[i].c[7] < i) {
 237                         int j;
 238
 239                         for (j=6;j>=0;j--) {
 240                                 if (blocks[i].c[j]=key->md.data[j]+1) break;
 241                         }
 242                 }
 243 #endif
 244                 blocks[i].c[8] = key->md.data[8];
 245                 blocks[i].c[9] = key->md.data[9];
 246                 blocks[i].c[10] = key->md.data[10];
 247                 /* fix length */
 248                 blocks[i].c[11] = (unsigned char)(len>>8);
 249                 blocks[i].c[12] = (unsigned char)(len);
 250
 251                 memcpy(blocks[i].c+13,hash_d[i].ptr,64-13);
 252                 hash_d[i].ptr += 64-13;
 253                 hash_d[i].blocks = (len-(64-13))/64;
 254
 255                 edges[i].ptr = blocks[i].c;
 256                 edges[i].blocks = 1;
 257         }
 258
 259         sha256_multi_block(ctx,edges,n4x);
 260         sha256_multi_block(ctx,hash_d,n4x);
 261
 262         memset(blocks,0,sizeof(blocks));
 263         for (i=0;i<x4;i++) {
 264                 unsigned int            len = (i==(x4-1)?last:frag),
 265                                         off = hash_d[i].blocks*64;
 266                 const unsigned char    *ptr = hash_d[i].ptr+off;
 267
 268                 off = len-(64-13)-off;  /* remainder actually */
 269                 memcpy(blocks[i].c,ptr,off);
 270                 blocks[i].c[off]=0x80;
 271                 len += 64+13;           /* 64 is HMAC header */
 272                 len *= 8;               /* convert to bits */
 273                 if (off<(64-8)) {
 274                         blocks[i].d[15] = BSWAP4(len);
 275                         edges[i].blocks = 1;
 276                 } else {
 277                         blocks[i].d[31] = BSWAP4(len);
 278                         edges[i].blocks = 2;
 279                 }
 280                 edges[i].ptr = blocks[i].c;
 281         }
 282
 283         sha256_multi_block(ctx,edges,n4x);
 284
 285         memset(blocks,0,sizeof(blocks));
 286         for (i=0;i<x4;i++) {
 287                 blocks[i].d[0] = BSWAP4(ctx->A[i]);     ctx->A[i] = key->tail.h[0];
 288                 blocks[i].d[1] = BSWAP4(ctx->B[i]);     ctx->B[i] = key->tail.h[1];
 289                 blocks[i].d[2] = BSWAP4(ctx->C[i]);     ctx->C[i] = key->tail.h[2];
 290                 blocks[i].d[3] = BSWAP4(ctx->D[i]);     ctx->D[i] = key->tail.h[3];
 291                 blocks[i].d[4] = BSWAP4(ctx->E[i]);     ctx->E[i] = key->tail.h[4];
 292                 blocks[i].d[5] = BSWAP4(ctx->F[i]);     ctx->F[i] = key->tail.h[5];
 293                 blocks[i].d[6] = BSWAP4(ctx->G[i]);     ctx->G[i] = key->tail.h[6];
 294                 blocks[i].d[7] = BSWAP4(ctx->H[i]);     ctx->H[i] = key->tail.h[7];
 295                 blocks[i].c[32] = 0x80;
 296                 blocks[i].d[15] = BSWAP4((64+32)*8);
 297                 edges[i].ptr = blocks[i].c;
 298                 edges[i].blocks = 1;
 299         }
 300
 301         sha256_multi_block(ctx,edges,n4x);
 302
 303         packlen = 5+16+((frag+32+16)&-16);
 304
 305         out += (packlen<<(1+n4x))-packlen;
 306         inp += (frag<<(1+n4x))-frag;
 307
 308         for (i=x4-1;;i--) {
 309                 unsigned int len = (i==(x4-1)?last:frag), pad, j;
 310                 unsigned char *out0 = out;
 311
 312                 out += 5+16;            /* place for header and explicit IV */
 313                 ciph_d[i].inp = out;
 314                 ciph_d[i].out = out;
 315
 316                 memmove(out,inp,len);
 317                 out += len;
 318                 inp -= frag;
 319
 320                 ((u32 *)out)[0] = BSWAP4(ctx->A[i]);
 321                 ((u32 *)out)[1] = BSWAP4(ctx->B[i]);
 322                 ((u32 *)out)[2] = BSWAP4(ctx->C[i]);
 323                 ((u32 *)out)[3] = BSWAP4(ctx->D[i]);
 324                 ((u32 *)out)[4] = BSWAP4(ctx->E[i]);
 325                 ((u32 *)out)[5] = BSWAP4(ctx->F[i]);
 326                 ((u32 *)out)[6] = BSWAP4(ctx->G[i]);
 327                 ((u32 *)out)[7] = BSWAP4(ctx->H[i]);
 328                 out += 32;
 329                 len += 32+16;
 330
 331                 pad = 15-len%16;
 332                 for (j=0;j<=pad;j++) *(out++) = pad;
 333                 len += pad+1;
 334
 335                 ciph_d[i].blocks = len/16;
 336
 337                 /* arrange header */
 338                 out0[0] = key->md.data[8];
 339                 out0[1] = key->md.data[9];
 340                 out0[2] = key->md.data[10];
 341                 out0[3] = (unsigned char)(len>>8);
 342                 out0[4] = (unsigned char)(len);
 343
 344                 /* explicit iv */
 345                 RAND_bytes((u8 *)ciph_d[i].iv, 16);
 346                 memcpy(&out[5], ciph_d[i].iv, 16);
 347
 348                 ret += len+5;
 349
 350                 if (i==0) break;
 351
 352                 out = out0-packlen;
 353         }
 354
 355         aesni_multi_cbc_encrypt(ciph_d,&key->ks,n4x);
 356
 357         return ret;
 358 }
 359 #endif
 360
 361 static int aesni_cbc_hmac_sha256_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 362                       const unsigned char *in, size_t len)
 363         {
 364         EVP_AES_HMAC_SHA256 *key = data(ctx);
 365         unsigned int l;
 366         size_t  plen = key->payload_length,
 367                 iv = 0,         /* explicit IV in TLS 1.1 and later */
 368                 sha_off = 0;
 369 #if defined(STITCHED_CALL)
 370         size_t  aes_off = 0,
 371                 blocks;
 372
 373         sha_off = SHA256_CBLOCK-key->md.num;
 374 #endif
 375
 376         key->payload_length = NO_PAYLOAD_LENGTH;
 377
 378         if (len%AES_BLOCK_SIZE) return 0;
 379
 380         if (ctx->encrypt) {
 381                 if (plen==NO_PAYLOAD_LENGTH)
 382                         plen = len;
 383                 else if (len!=((plen+SHA256_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE))
 384                         return 0;
 385                 else if (key->aux.tls_ver >= TLS1_1_VERSION)
 386                         iv = AES_BLOCK_SIZE;
 387
 388 #if defined(STITCHED_CALL)
 389                 if (OPENSSL_ia32cap_P[1]&(1<<(60-32)) &&
 390                     plen>(sha_off+iv) &&
 391                     (blocks=(plen-(sha_off+iv))/SHA256_CBLOCK)) {
 392                         SHA256_Update(&key->md,in+iv,sha_off);
 393
 394                         (void)aesni_cbc_sha256_enc(in,out,blocks,&key->ks,
 395                                 ctx->iv,&key->md,in+iv+sha_off);
 396                         blocks *= SHA256_CBLOCK;
 397                         aes_off += blocks;
 398                         sha_off += blocks;
 399                         key->md.Nh += blocks>>29;
 400                         key->md.Nl += blocks<<=3;
 401                         if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
 402                 } else {
 403                         sha_off = 0;
 404                 }
 405 #endif
 406                 sha_off += iv;
 407                 SHA256_Update(&key->md,in+sha_off,plen-sha_off);
 408
 409                 if (plen!=len)  {       /* "TLS" mode of operation */
 410                         if (in!=out)
 411                                 memcpy(out+aes_off,in+aes_off,plen-aes_off);
 412
 413                         /* calculate HMAC and append it to payload */
 414                         SHA256_Final(out+plen,&key->md);
 415                         key->md = key->tail;
 416                         SHA256_Update(&key->md,out+plen,SHA256_DIGEST_LENGTH);
 417                         SHA256_Final(out+plen,&key->md);
 418
 419                         /* pad the payload|hmac */
 420                         plen += SHA256_DIGEST_LENGTH;
 421                         for (l=len-plen-1;plen<len;plen++) out[plen]=l;
 422                         /* encrypt HMAC|padding at once */
 423                         aesni_cbc_encrypt(out+aes_off,out+aes_off,len-aes_off,
 424                                         &key->ks,ctx->iv,1);
 425                 } else {
 426                         aesni_cbc_encrypt(in+aes_off,out+aes_off,len-aes_off,
 427                                         &key->ks,ctx->iv,1);
 428                 }
 429         } else {
 430                 union { unsigned int  u[SHA256_DIGEST_LENGTH/sizeof(unsigned int)];
 431                         unsigned char c[64+SHA256_DIGEST_LENGTH]; } mac, *pmac;
 432
 433                 /* arrange cache line alignment */
 434                 pmac = (void *)(((size_t)mac.c+63)&((size_t)0-64));
 435
 436                 /* decrypt HMAC|padding at once */
 437                 aesni_cbc_encrypt(in,out,len,
 438                                 &key->ks,ctx->iv,0);
 439
 440                 if (plen) {     /* "TLS" mode of operation */
 441                         size_t inp_len, mask, j, i;
 442                         unsigned int res, maxpad, pad, bitlen;
 443                         int ret = 1;
 444                         union { unsigned int  u[SHA_LBLOCK];
 445                                 unsigned char c[SHA256_CBLOCK]; }
 446                                 *data = (void *)key->md.data;
 447
 448                         if ((key->aux.tls_aad[plen-4]<<8|key->aux.tls_aad[plen-3])
 449                             >= TLS1_1_VERSION)
 450                                 iv = AES_BLOCK_SIZE;
 451
 452                         if (len<(iv+SHA256_DIGEST_LENGTH+1))
 453                                 return 0;
 454
 455                         /* omit explicit iv */
 456                         out += iv;
 457                         len -= iv;
 458
 459                         /* figure out payload length */
 460                         pad = out[len-1];
 461                         maxpad = len-(SHA256_DIGEST_LENGTH+1);
 462                         maxpad |= (255-maxpad)>>(sizeof(maxpad)*8-8);
 463                         maxpad &= 255;
 464
 465                         inp_len = len - (SHA256_DIGEST_LENGTH+pad+1);
 466                         mask = (0-((inp_len-len)>>(sizeof(inp_len)*8-1)));
 467                         inp_len &= mask;
 468                         ret &= (int)mask;
 469
 470                         key->aux.tls_aad[plen-2] = inp_len>>8;
 471                         key->aux.tls_aad[plen-1] = inp_len;
 472
 473                         /* calculate HMAC */
 474                         key->md = key->head;
 475                         SHA256_Update(&key->md,key->aux.tls_aad,plen);
 476
 477 #if 1
 478                         len -= SHA256_DIGEST_LENGTH;            /* amend mac */
 479                         if (len>=(256+SHA256_CBLOCK)) {
 480                                 j = (len-(256+SHA256_CBLOCK))&(0-SHA256_CBLOCK);
 481                                 j += SHA256_CBLOCK-key->md.num;
 482                                 SHA256_Update(&key->md,out,j);
 483                                 out += j;
 484                                 len -= j;
 485                                 inp_len -= j;
 486                         }
 487
 488                         /* but pretend as if we hashed padded payload */
 489                         bitlen = key->md.Nl+(inp_len<<3);       /* at most 18 bits */
 490 #ifdef BSWAP4
 491                         bitlen = BSWAP4(bitlen);
 492 #else
 493                         mac.c[0] = 0;
 494                         mac.c[1] = (unsigned char)(bitlen>>16);
 495                         mac.c[2] = (unsigned char)(bitlen>>8);
 496                         mac.c[3] = (unsigned char)bitlen;
 497                         bitlen = mac.u[0];
 498 #endif
 499
 500                         pmac->u[0]=0;
 501                         pmac->u[1]=0;
 502                         pmac->u[2]=0;
 503                         pmac->u[3]=0;
 504                         pmac->u[4]=0;
 505                         pmac->u[5]=0;
 506                         pmac->u[6]=0;
 507                         pmac->u[7]=0;
 508
 509                         for (res=key->md.num, j=0;j<len;j++) {
 510                                 size_t c = out[j];
 511                                 mask = (j-inp_len)>>(sizeof(j)*8-8);
 512                                 c &= mask;
 513                                 c |= 0x80&~mask&~((inp_len-j)>>(sizeof(j)*8-8));
 514                                 data->c[res++]=(unsigned char)c;
 515
 516                                 if (res!=SHA256_CBLOCK) continue;
 517
 518                                 /* j is not incremented yet */
 519                                 mask = 0-((inp_len+7-j)>>(sizeof(j)*8-1));
 520                                 data->u[SHA_LBLOCK-1] |= bitlen&mask;
 521                                 sha256_block_data_order(&key->md,data,1);
 522                                 mask &= 0-((j-inp_len-72)>>(sizeof(j)*8-1));
 523                                 pmac->u[0] |= key->md.h[0] & mask;
 524                                 pmac->u[1] |= key->md.h[1] & mask;
 525                                 pmac->u[2] |= key->md.h[2] & mask;
 526                                 pmac->u[3] |= key->md.h[3] & mask;
 527                                 pmac->u[4] |= key->md.h[4] & mask;
 528                                 pmac->u[5] |= key->md.h[5] & mask;
 529                                 pmac->u[6] |= key->md.h[6] & mask;
 530                                 pmac->u[7] |= key->md.h[7] & mask;
 531                                 res=0;
 532                         }
 533
 534                         for(i=res;i<SHA256_CBLOCK;i++,j++) data->c[i]=0;
 535
 536                         if (res>SHA256_CBLOCK-8) {
 537                                 mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
 538                                 data->u[SHA_LBLOCK-1] |= bitlen&mask;
 539                                 sha256_block_data_order(&key->md,data,1);
 540                                 mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
 541                                 pmac->u[0] |= key->md.h[0] & mask;
 542                                 pmac->u[1] |= key->md.h[1] & mask;
 543                                 pmac->u[2] |= key->md.h[2] & mask;
 544                                 pmac->u[3] |= key->md.h[3] & mask;
 545                                 pmac->u[4] |= key->md.h[4] & mask;
 546                                 pmac->u[5] |= key->md.h[5] & mask;
 547                                 pmac->u[6] |= key->md.h[6] & mask;
 548                                 pmac->u[7] |= key->md.h[7] & mask;
 549
 550                                 memset(data,0,SHA256_CBLOCK);
 551                                 j+=64;
 552                         }
 553                         data->u[SHA_LBLOCK-1] = bitlen;
 554                         sha256_block_data_order(&key->md,data,1);
 555                         mask = 0-((j-inp_len-73)>>(sizeof(j)*8-1));
 556                         pmac->u[0] |= key->md.h[0] & mask;
 557                         pmac->u[1] |= key->md.h[1] & mask;
 558                         pmac->u[2] |= key->md.h[2] & mask;
 559                         pmac->u[3] |= key->md.h[3] & mask;
 560                         pmac->u[4] |= key->md.h[4] & mask;
 561                         pmac->u[5] |= key->md.h[5] & mask;
 562                         pmac->u[6] |= key->md.h[6] & mask;
 563                         pmac->u[7] |= key->md.h[7] & mask;
 564
 565 #ifdef BSWAP4
 566                         pmac->u[0] = BSWAP4(pmac->u[0]);
 567                         pmac->u[1] = BSWAP4(pmac->u[1]);
 568                         pmac->u[2] = BSWAP4(pmac->u[2]);
 569                         pmac->u[3] = BSWAP4(pmac->u[3]);
 570                         pmac->u[4] = BSWAP4(pmac->u[4]);
 571                         pmac->u[5] = BSWAP4(pmac->u[5]);
 572                         pmac->u[6] = BSWAP4(pmac->u[6]);
 573                         pmac->u[7] = BSWAP4(pmac->u[7]);
 574 #else
 575                         for (i=0;i<8;i++) {
 576                                 res = pmac->u[i];
 577                                 pmac->c[4*i+0]=(unsigned char)(res>>24);
 578                                 pmac->c[4*i+1]=(unsigned char)(res>>16);
 579                                 pmac->c[4*i+2]=(unsigned char)(res>>8);
 580                                 pmac->c[4*i+3]=(unsigned char)res;
 581                         }
 582 #endif
 583                         len += SHA256_DIGEST_LENGTH;
 584 #else
 585                         SHA256_Update(&key->md,out,inp_len);
 586                         res = key->md.num;
 587                         SHA256_Final(pmac->c,&key->md);
 588
 589                         {
 590                         unsigned int inp_blocks, pad_blocks;
 591
 592                         /* but pretend as if we hashed padded payload */
 593                         inp_blocks = 1+((SHA256_CBLOCK-9-res)>>(sizeof(res)*8-1));
 594                         res += (unsigned int)(len-inp_len);
 595                         pad_blocks = res / SHA256_CBLOCK;
 596                         res %= SHA256_CBLOCK;
 597                         pad_blocks += 1+((SHA256_CBLOCK-9-res)>>(sizeof(res)*8-1));
 598                         for (;inp_blocks<pad_blocks;inp_blocks++)
 599                                 sha1_block_data_order(&key->md,data,1);
 600                         }
 601 #endif
 602                         key->md = key->tail;
 603                         SHA256_Update(&key->md,pmac->c,SHA256_DIGEST_LENGTH);
 604                         SHA256_Final(pmac->c,&key->md);
 605
 606                         /* verify HMAC */
 607                         out += inp_len;
 608                         len -= inp_len;
 609 #if 1
 610                         {
 611                         unsigned char *p = out+len-1-maxpad-SHA256_DIGEST_LENGTH;
 612                         size_t off = out-p;
 613                         unsigned int c, cmask;
 614
 615                         maxpad += SHA256_DIGEST_LENGTH;
 616                         for (res=0,i=0,j=0;j<maxpad;j++) {
 617                                 c = p[j];
 618                                 cmask = ((int)(j-off-SHA256_DIGEST_LENGTH))>>(sizeof(int)*8-1);
 619                                 res |= (c^pad)&~cmask;  /* ... and padding */
 620                                 cmask &= ((int)(off-1-j))>>(sizeof(int)*8-1);
 621                                 res |= (c^pmac->c[i])&cmask;
 622                                 i += 1&cmask;
 623                         }
 624                         maxpad -= SHA256_DIGEST_LENGTH;
 625
 626                         res = 0-((0-res)>>(sizeof(res)*8-1));
 627                         ret &= (int)~res;
 628                         }
 629 #else
 630                         for (res=0,i=0;i<SHA256_DIGEST_LENGTH;i++)
 631                                 res |= out[i]^pmac->c[i];
 632                         res = 0-((0-res)>>(sizeof(res)*8-1));
 633                         ret &= (int)~res;
 634
 635                         /* verify padding */
 636                         pad = (pad&~res) | (maxpad&res);
 637                         out = out+len-1-pad;
 638                         for (res=0,i=0;i<pad;i++)
 639                                 res |= out[i]^pad;
 640
 641                         res = (0-res)>>(sizeof(res)*8-1);
 642                         ret &= (int)~res;
 643 #endif
 644                         return ret;
 645                 } else {
 646                         SHA256_Update(&key->md,out,len);
 647                 }
 648         }
 649
 650         return 1;
 651         }
 652
 653 static int aesni_cbc_hmac_sha256_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
 654         {
 655         EVP_AES_HMAC_SHA256 *key = data(ctx);
 656
 657         switch (type)
 658                 {
 659         case EVP_CTRL_AEAD_SET_MAC_KEY:
 660                 {
 661                 unsigned int  i;
 662                 unsigned char hmac_key[64];
 663
 664                 memset (hmac_key,0,sizeof(hmac_key));
 665
 666                 if (arg > (int)sizeof(hmac_key)) {
 667                         SHA256_Init(&key->head);
 668                         SHA256_Update(&key->head,ptr,arg);
 669                         SHA256_Final(hmac_key,&key->head);
 670                 } else {
 671                         memcpy(hmac_key,ptr,arg);
 672                 }
 673
 674                 for (i=0;i<sizeof(hmac_key);i++)
 675                         hmac_key[i] ^= 0x36;            /* ipad */
 676                 SHA256_Init(&key->head);
 677                 SHA256_Update(&key->head,hmac_key,sizeof(hmac_key));
 678
 679                 for (i=0;i<sizeof(hmac_key);i++)
 680                         hmac_key[i] ^= 0x36^0x5c;       /* opad */
 681                 SHA256_Init(&key->tail);
 682                 SHA256_Update(&key->tail,hmac_key,sizeof(hmac_key));
 683
 684                 OPENSSL_cleanse(hmac_key,sizeof(hmac_key));
 685
 686                 return 1;
 687                 }
 688         case EVP_CTRL_AEAD_TLS1_AAD:
 689                 {
 690                 unsigned char *p=ptr;
 691                 unsigned int   len=p[arg-2]<<8|p[arg-1];
 692
 693                 if (ctx->encrypt)
 694                         {
 695                         key->payload_length = len;
 696                         if ((key->aux.tls_ver=p[arg-4]<<8|p[arg-3]) >= TLS1_1_VERSION) {
 697                                 len -= AES_BLOCK_SIZE;
 698                                 p[arg-2] = len>>8;
 699                                 p[arg-1] = len;
 700                         }
 701                         key->md = key->head;
 702                         SHA256_Update(&key->md,p,arg);
 703
 704                         return (int)(((len+SHA256_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE)
 705                                 - len);
 706                         }
 707                 else
 708                         {
 709                         if (arg>13) arg = 13;
 710                         memcpy(key->aux.tls_aad,ptr,arg);
 711                         key->payload_length = arg;
 712
 713                         return SHA256_DIGEST_LENGTH;
 714                         }
 715                 }
 716 #if EVP_EVP_CIPH_FLAG_TLS11_MULTI_BLOCK
 717         case EVP_CTRL_TLS11_MULTI_BLOCK_AAD:
 718                 {
 719                 EVP_CTRL_TLS11_MULTI_BLOCK_PARAM *param =
 720                         (EVP_CTRL_TLS11_MULTI_BLOCK_PARAM *)ptr;
 721                 unsigned int n4x=1, x4;
 722                 unsigned int frag, last, packlen, inp_len;
 723
 724                 if (arg<sizeof(EVP_CTRL_TLS11_MULTI_BLOCK_PARAM)) return -1;
 725
 726                 inp_len = param->inp[11]<<8|param->inp[12];
 727
 728                 if (ctx->encrypt)
 729                         {
 730                         if ((param->inp[9]<<8|param->inp[10]) < TLS1_1_VERSION)
 731                                 return -1;
 732
 733                         if (inp_len<2048) return -1;    /* too short */
 734
 735                         if (inp_len>=6144) n4x=2;
 736
 737                         key->md = key->head;
 738                         SHA256_Update(&key->md,param->inp,13);
 739
 740                         x4 = 4*n4x; n4x += 1;
 741
 742                         frag = inp_len>>n4x;
 743                         last = inp_len+frag-(frag<<n4x);
 744                         if (last>frag && ((last+13+9)%64<(x4-1))) {
 745                                 frag++;
 746                                 last -= x4-1;
 747                         }
 748
 749                         packlen = 5+16+((frag+32+16)&-16);
 750                         packlen = (packlen<<(1+n4x))-packlen;
 751                         packlen += 5+16+((last+32+16)&-16);
 752
 753                         param->interleave = x4;
 754
 755                         return (int)packlen;
 756                         }
 757                 else
 758                         return -1;      /* not yet */
 759                 }
 760         case EVP_CTRL_TLS11_MULTI_BLOCK_ENCRYPT:
 761                 {
 762                 EVP_CTRL_TLS11_MULTI_BLOCK_PARAM *param =
 763                         (EVP_CTRL_TLS11_MULTI_BLOCK_PARAM *)ptr;
 764
 765                 return tls11_multi_block_encrypt(key,param->out,param->inp,
 766                                                 param->len,param->interleave/4);
 767                 }
 768         case EVP_CTRL_TLS11_MULTI_BLOCK_DECRYPT:
 769 #endif
 770         default:
 771                 return -1;
 772                 }
 773         }
 774
 775 static EVP_CIPHER aesni_128_cbc_hmac_sha256_cipher =
 776         {
 777 #ifdef NID_aes_128_cbc_hmac_sha256
 778         NID_aes_128_cbc_hmac_sha256,
 779 #else
 780         NID_undef,
 781 #endif
 782         16,16,16,
 783         EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|
 784         EVP_CIPH_FLAG_AEAD_CIPHER|EVP_CIPH_FLAG_TLS11_MULTI_BLOCK,
 785         aesni_cbc_hmac_sha256_init_key,
 786         aesni_cbc_hmac_sha256_cipher,
 787         NULL,
 788         sizeof(EVP_AES_HMAC_SHA256),
 789         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
 790         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
 791         aesni_cbc_hmac_sha256_ctrl,
 792         NULL
 793         };
 794
 795 static EVP_CIPHER aesni_256_cbc_hmac_sha256_cipher =
 796         {
 797 #ifdef NID_aes_256_cbc_hmac_sha256
 798         NID_aes_256_cbc_hmac_sha256,
 799 #else
 800         NID_undef,
 801 #endif
 802         16,32,16,
 803         EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|
 804         EVP_CIPH_FLAG_AEAD_CIPHER|EVP_CIPH_FLAG_TLS11_MULTI_BLOCK,
 805         aesni_cbc_hmac_sha256_init_key,
 806         aesni_cbc_hmac_sha256_cipher,
 807         NULL,
 808         sizeof(EVP_AES_HMAC_SHA256),
 809         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv,
 810         EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv,
 811         aesni_cbc_hmac_sha256_ctrl,
 812         NULL
 813         };
 814
 815 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
 816         {
 817         return((OPENSSL_ia32cap_P[1]&AESNI_CAPABLE) &&
 818                 aesni_cbc_sha256_enc(NULL,NULL,0,NULL,NULL,NULL,NULL) ?
 819                 &aesni_128_cbc_hmac_sha256_cipher:NULL);
 820         }
 821
 822 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
 823         {
 824         return((OPENSSL_ia32cap_P[1]&AESNI_CAPABLE) &&
 825                 aesni_cbc_sha256_enc(NULL,NULL,0,NULL,NULL,NULL,NULL)?
 826                 &aesni_256_cbc_hmac_sha256_cipher:NULL);
 827         }
 828 #else
 829 const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
 830         {
 831         return NULL;
 832         }
 833 const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
 834         {
 835         return NULL;
 836         }
 837 #endif
 838 #endif