crypto/evp/e_aes.c

   1 /* ====================================================================
   2  * Copyright (c) 2001-2011 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  *    openssl-core@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
  51 #define OPENSSL_FIPSAPI
  52
  53 #include <openssl/opensslconf.h>
  54 #ifndef OPENSSL_NO_AES
  55 #include <openssl/evp.h>
  56 #include <openssl/err.h>
  57 #include <string.h>
  58 #include <assert.h>
  59 #include <openssl/aes.h>
  60 #include "evp_locl.h"
  61 #include "modes_lcl.h"
  62 #include <openssl/rand.h>
  63
  64 typedef struct
  65         {
  66         AES_KEY ks;
  67         } EVP_AES_KEY;
  68
  69 typedef struct
  70         {
  71         AES_KEY ks;             /* AES key schedule to use */
  72         int key_set;            /* Set if key initialised */
  73         int iv_set;             /* Set if an iv is set */
  74         GCM128_CONTEXT gcm;
  75         unsigned char *iv;      /* Temporary IV store */
  76         int ivlen;              /* IV length */
  77         int taglen;
  78         int iv_gen;             /* It is OK to generate IVs */
  79         int tls_aad_len;        /* TLS AAD length */
  80         } EVP_AES_GCM_CTX;
  81
  82 typedef struct
  83         {
  84         AES_KEY ks1, ks2;       /* AES key schedules to use */
  85         XTS128_CONTEXT xts;
  86         } EVP_AES_XTS_CTX;
  87
  88 typedef struct
  89         {
  90         AES_KEY ks;             /* AES key schedule to use */
  91         int key_set;            /* Set if key initialised */
  92         int iv_set;             /* Set if an iv is set */
  93         int tag_set;            /* Set if tag is valid */
  94         int len_set;            /* Set if message length set */
  95         int L, M;               /* L and M parameters from RFC3610 */
  96         CCM128_CONTEXT ccm;
  97         } EVP_AES_CCM_CTX;
  98
  99 #define MAXBITCHUNK     ((size_t)1<<(sizeof(size_t)*8-4))
 100
 101 #if     defined(AES_ASM) && !defined(I386_ONLY) &&      (  \
 102         ((defined(__i386)       || defined(__i386__)    || \
 103           defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \
 104         defined(__x86_64)       || defined(__x86_64__)  || \
 105         defined(_M_AMD64)       || defined(_M_X64)      || \
 106         defined(__INTEL__)                              )
 107 /*
 108  * AES-NI section
 109  */
 110 extern unsigned int OPENSSL_ia32cap_P[2];
 111 #define AESNI_CAPABLE   (1<<(57-32))
 112
 113 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
 114                         AES_KEY *key);
 115 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
 116                         AES_KEY *key);
 117
 118 void aesni_encrypt(const unsigned char *in, unsigned char *out,
 119                         const AES_KEY *key);
 120 void aesni_decrypt(const unsigned char *in, unsigned char *out,
 121                         const AES_KEY *key);
 122
 123 void aesni_ecb_encrypt(const unsigned char *in,
 124                         unsigned char *out,
 125                         size_t length,
 126                         const AES_KEY *key,
 127                         int enc);
 128 void aesni_cbc_encrypt(const unsigned char *in,
 129                         unsigned char *out,
 130                         size_t length,
 131                         const AES_KEY *key,
 132                         unsigned char *ivec, int enc);
 133
 134 void aesni_ctr32_encrypt_blocks(const unsigned char *in,
 135                         unsigned char *out,
 136                         size_t blocks,
 137                         const void *key,
 138                         const unsigned char *ivec);
 139
 140 void aesni_xts_encrypt(const unsigned char *in,
 141                         unsigned char *out,
 142                         size_t length,
 143                         const AES_KEY *key1, const AES_KEY *key2,
 144                         const unsigned char iv[16]);
 145
 146 void aesni_xts_decrypt(const unsigned char *in,
 147                         unsigned char *out,
 148                         size_t length,
 149                         const AES_KEY *key1, const AES_KEY *key2,
 150                         const unsigned char iv[16]);
 151
 152 void aesni_ccm64_encrypt_blocks (const unsigned char *in,
 153                         unsigned char *out,
 154                         size_t blocks,
 155                         const void *key,
 156                         const unsigned char ivec[16],
 157                         unsigned char cmac[16]);
 158
 159 void aesni_ccm64_decrypt_blocks (const unsigned char *in,
 160                         unsigned char *out,
 161                         size_t blocks,
 162                         const void *key,
 163                         const unsigned char ivec[16],
 164                         unsigned char cmac[16]);
 165
 166 static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 167                    const unsigned char *iv, int enc)
 168         {
 169         int ret;
 170
 171         if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
 172             || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
 173             && !enc)
 174                 ret = aesni_set_decrypt_key(key, ctx->key_len*8, ctx->cipher_data);
 175         else
 176                 ret = aesni_set_encrypt_key(key, ctx->key_len*8, ctx->cipher_data);
 177
 178         if(ret < 0)
 179                 {
 180                 EVPerr(EVP_F_AESNI_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
 181                 return 0;
 182                 }
 183
 184         return 1;
 185         }
 186
 187 static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 188         const unsigned char *in, size_t len)
 189 {
 190         aesni_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
 191
 192         return 1;
 193 }
 194
 195 static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 196         const unsigned char *in, size_t len)
 197 {
 198         size_t  bl = ctx->cipher->block_size;
 199
 200         if (len<bl)     return 1;
 201
 202         aesni_ecb_encrypt(in,out,len,ctx->cipher_data,ctx->encrypt);
 203
 204         return 1;
 205 }
 206
 207 static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 208         const unsigned char *in,size_t len)
 209 {
 210         CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
 211                         ctx->iv,&ctx->num,
 212                         (block128_f)aesni_encrypt);
 213         return 1;
 214 }
 215
 216 static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 217         const unsigned char *in,size_t len)
 218 {
 219         CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
 220                         ctx->iv,&ctx->num,ctx->encrypt,
 221                         (block128_f)aesni_encrypt);
 222         return 1;
 223 }
 224
 225 static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 226         const unsigned char *in,size_t len)
 227 {
 228         CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
 229                         ctx->iv,&ctx->num,ctx->encrypt,
 230                         (block128_f)aesni_encrypt);
 231         return 1;
 232 }
 233
 234 static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 235         const unsigned char *in,size_t len)
 236 {
 237         if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
 238                 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
 239                         ctx->iv,&ctx->num,ctx->encrypt,
 240                         (block128_f)aesni_encrypt);
 241                 return 1;
 242         }
 243
 244         while (len>=MAXBITCHUNK) {
 245                 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
 246                         ctx->iv,&ctx->num,ctx->encrypt,
 247                         (block128_f)aesni_encrypt);
 248                 len-=MAXBITCHUNK;
 249         }
 250         if (len)
 251                 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
 252                         ctx->iv,&ctx->num,ctx->encrypt,
 253                         (block128_f)aesni_encrypt);
 254
 255         return 1;
 256 }
 257
 258 static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 259                 const unsigned char *in, size_t len)
 260 {
 261         unsigned int num;
 262         num = ctx->num;
 263
 264         CRYPTO_ctr128_encrypt_ctr32(in,out,len,
 265                         ctx->cipher_data,ctx->iv,ctx->buf,&num,
 266                         (ctr128_f)aesni_ctr32_encrypt_blocks);
 267
 268         ctx->num = (size_t)num;
 269         return 1;
 270 }
 271
 272 static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 273                         const unsigned char *iv, int enc)
 274         {
 275         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 276         if (!iv && !key)
 277                 return 1;
 278         if (key)
 279                 {
 280                 aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
 281                 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
 282                                 (block128_f)aesni_encrypt);
 283                 /* If we have an iv can set it directly, otherwise use
 284                  * saved IV.
 285                  */
 286                 if (iv == NULL && gctx->iv_set)
 287                         iv = gctx->iv;
 288                 if (iv)
 289                         {
 290                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 291                         gctx->iv_set = 1;
 292                         }
 293                 gctx->key_set = 1;
 294                 }
 295         else
 296                 {
 297                 /* If key set use IV, otherwise copy */
 298                 if (gctx->key_set)
 299                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 300                 else
 301                         memcpy(gctx->iv, iv, gctx->ivlen);
 302                 gctx->iv_set = 1;
 303                 gctx->iv_gen = 0;
 304                 }
 305         return 1;
 306         }
 307
 308 /* Handle TLS GCM packet format. This consists of the last portion of the IV
 309  * followed by the payload and finally the tag. On encrypt generate IV,
 310  * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
 311  * and verify tag.
 312  */
 313
 314 static int aesni_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 315                 const unsigned char *in, size_t len)
 316         {
 317         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 318         int rv = -1;
 319         /* Encrypt/decrypt must be performed in place */
 320         if (out != in)
 321                 return -1;
 322         /* Set IV from start of buffer or generate IV and write to start
 323          * of buffer.
 324          */
 325         if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
 326                                 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
 327                                 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
 328                 goto err;
 329         /* Use saved AAD */
 330         if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
 331                 goto err;
 332         /* Fix buffer and length to point to payload */
 333         in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 334         out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 335         len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 336         if (ctx->encrypt)
 337                 {
 338                 /* Encrypt payload */
 339                 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, in, out, len,
 340                                                 aesni_ctr32_encrypt_blocks))
 341                 out += len;
 342                 /* Finally write tag */
 343                 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
 344                 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 345                 }
 346         else
 347                 {
 348                 /* Decrypt */
 349                 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, in, out, len,
 350                                                 aesni_ctr32_encrypt_blocks))
 351                         goto err;
 352                 /* Retrieve tag */
 353                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
 354                                         EVP_GCM_TLS_TAG_LEN);
 355                 /* If tag mismatch wipe buffer */
 356                 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
 357                         {
 358                         OPENSSL_cleanse(out, len);
 359                         goto err;
 360                         }
 361                 rv = len;
 362                 }
 363
 364         err:
 365         gctx->iv_set = 0;
 366         gctx->tls_aad_len = -1;
 367         return rv;
 368         }
 369
 370 static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 371                 const unsigned char *in, size_t len)
 372         {
 373         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 374         /* If not set up, return error */
 375         if (!gctx->key_set)
 376                 return -1;
 377
 378         if (gctx->tls_aad_len >= 0)
 379                 return aesni_gcm_tls_cipher(ctx, out, in, len);
 380
 381         if (!gctx->iv_set)
 382                 return -1;
 383         if (!ctx->encrypt && gctx->taglen < 0)
 384                 return -1;
 385         if (in)
 386                 {
 387                 if (out == NULL)
 388                         {
 389                         if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
 390                                 return -1;
 391                         }
 392                 else if (ctx->encrypt)
 393                         {
 394                         if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
 395                                         in, out, len,
 396                                         aesni_ctr32_encrypt_blocks))
 397                                 return -1;
 398                         }
 399                 else
 400                         {
 401                         if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
 402                                         in, out, len,
 403                                         aesni_ctr32_encrypt_blocks))
 404                                 return -1;
 405                         }
 406                 return len;
 407                 }
 408         else
 409                 {
 410                 if (!ctx->encrypt)
 411                         {
 412                         if (CRYPTO_gcm128_finish(&gctx->gcm,
 413                                         ctx->buf, gctx->taglen) != 0)
 414                                 return -1;
 415                         gctx->iv_set = 0;
 416                         return 0;
 417                         }
 418                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
 419                 gctx->taglen = 16;
 420                 /* Don't reuse the IV */
 421                 gctx->iv_set = 0;
 422                 return 0;
 423                 }
 424
 425         }
 426
 427 static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 428                         const unsigned char *iv, int enc)
 429         {
 430         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 431         if (!iv && !key)
 432                 return 1;
 433
 434         if (key)
 435                 {
 436                 /* key_len is two AES keys */
 437                 if (enc)
 438                         {
 439                         aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
 440                         xctx->xts.block1 = (block128_f)aesni_encrypt;
 441                         }
 442                 else
 443                         {
 444                         aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
 445                         xctx->xts.block1 = (block128_f)aesni_decrypt;
 446                         }
 447
 448                 aesni_set_encrypt_key(key + ctx->key_len/2,
 449                                                 ctx->key_len * 4, &xctx->ks2);
 450                 xctx->xts.block2 = (block128_f)aesni_encrypt;
 451
 452                 xctx->xts.key1 = &xctx->ks1;
 453                 }
 454
 455         if (iv)
 456                 {
 457                 xctx->xts.key2 = &xctx->ks2;
 458                 memcpy(ctx->iv, iv, 16);
 459                 }
 460
 461         return 1;
 462         }
 463
 464 static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 465                 const unsigned char *in, size_t len)
 466         {
 467         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 468         if (!xctx->xts.key1 || !xctx->xts.key2)
 469                 return -1;
 470         if (!out || !in)
 471                 return -1;
 472 #ifdef OPENSSL_FIPS
 473         /* Requirement of SP800-38E */
 474         if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
 475                         (len > (1L<<20)*16))
 476                 {
 477                 EVPerr(EVP_F_AESNI_XTS_CIPHER, EVP_R_TOO_LARGE);
 478                 return -1;
 479                 }
 480 #endif
 481         if (ctx->encrypt)
 482                 aesni_xts_encrypt(in, out, len,
 483                         xctx->xts.key1, xctx->xts.key2, ctx->iv);
 484         else
 485                 aesni_xts_decrypt(in, out, len,
 486                         xctx->xts.key1, xctx->xts.key2, ctx->iv);
 487
 488         return len;
 489         }
 490
 491 static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 492                         const unsigned char *iv, int enc)
 493         {
 494         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 495         if (!iv && !key)
 496                 return 1;
 497         if (key)
 498                 {
 499                 aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
 500                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 501                                         &cctx->ks, (block128_f)aesni_encrypt);
 502                 cctx->key_set = 1;
 503                 }
 504         if (iv)
 505                 {
 506                 memcpy(ctx->iv, iv, 15 - cctx->L);
 507                 cctx->iv_set = 1;
 508                 }
 509         return 1;
 510         }
 511
 512 static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 513                 const unsigned char *in, size_t len)
 514         {
 515         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 516         CCM128_CONTEXT *ccm = &cctx->ccm;
 517         /* If not set up, return error */
 518         if (!cctx->iv_set && !cctx->key_set)
 519                 return -1;
 520         if (!ctx->encrypt && !cctx->tag_set)
 521                 return -1;
 522         if (!out)
 523                 {
 524                 if (!in)
 525                         {
 526                         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
 527                                 return -1;
 528                         cctx->len_set = 1;
 529                         return len;
 530                         }
 531                 /* If have AAD need message length */
 532                 if (!cctx->len_set && len)
 533                         return -1;
 534                 CRYPTO_ccm128_aad(ccm, in, len);
 535                 return len;
 536                 }
 537         /* EVP_*Final() doesn't return any data */
 538         if (!in)
 539                 return 0;
 540         /* If not set length yet do it */
 541         if (!cctx->len_set)
 542                 {
 543                 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
 544                         return -1;
 545                 cctx->len_set = 1;
 546                 }
 547         if (ctx->encrypt)
 548                 {
 549                 if (CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
 550                                 aesni_ccm64_encrypt_blocks))
 551                         return -1;
 552                 cctx->tag_set = 1;
 553                 return len;
 554                 }
 555         else
 556                 {
 557                 int rv = -1;
 558                 if (!CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
 559                                 aesni_ccm64_decrypt_blocks))
 560                         {
 561                         unsigned char tag[16];
 562                         if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
 563                                 {
 564                                 if (!memcmp(tag, ctx->buf, cctx->M))
 565                                         rv = len;
 566                                 }
 567                         }
 568                 if (rv == -1)
 569                         OPENSSL_cleanse(out, len);
 570                 cctx->iv_set = 0;
 571                 cctx->tag_set = 0;
 572                 cctx->len_set = 0;
 573                 return rv;
 574                 }
 575
 576         }
 577
 578 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 579 static const EVP_CIPHER aesni_##keylen##_##mode = { \
 580         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 581         flags|EVP_CIPH_##MODE##_MODE,   \
 582         aesni_init_key,                 \
 583         aesni_##mode##_cipher,          \
 584         NULL,                           \
 585         sizeof(EVP_AES_KEY),            \
 586         NULL,NULL,NULL,NULL }; \
 587 static const EVP_CIPHER aes_##keylen##_##mode = { \
 588         nid##_##keylen##_##nmode,blocksize,     \
 589         keylen/8,ivlen, \
 590         flags|EVP_CIPH_##MODE##_MODE,   \
 591         aes_init_key,                   \
 592         aes_##mode##_cipher,            \
 593         NULL,                           \
 594         sizeof(EVP_AES_KEY),            \
 595         NULL,NULL,NULL,NULL }; \
 596 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
 597 { return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
 598   &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
 599
 600 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
 601 static const EVP_CIPHER aesni_##keylen##_##mode = { \
 602         nid##_##keylen##_##mode,blocksize, \
 603         (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
 604         flags|EVP_CIPH_##MODE##_MODE,   \
 605         aesni_##mode##_init_key,        \
 606         aesni_##mode##_cipher,          \
 607         aes_##mode##_cleanup,           \
 608         sizeof(EVP_AES_##MODE##_CTX),   \
 609         NULL,NULL,aes_##mode##_ctrl,NULL }; \
 610 static const EVP_CIPHER aes_##keylen##_##mode = { \
 611         nid##_##keylen##_##mode,blocksize, \
 612         (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
 613         flags|EVP_CIPH_##MODE##_MODE,   \
 614         aes_##mode##_init_key,          \
 615         aes_##mode##_cipher,            \
 616         aes_##mode##_cleanup,           \
 617         sizeof(EVP_AES_##MODE##_CTX),   \
 618         NULL,NULL,aes_##mode##_ctrl,NULL }; \
 619 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
 620 { return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
 621   &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
 622
 623 #else
 624
 625 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 626 static const EVP_CIPHER aes_##keylen##_##mode = { \
 627         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 628         flags|EVP_CIPH_##MODE##_MODE,   \
 629         aes_init_key,                   \
 630         aes_##mode##_cipher,            \
 631         NULL,                           \
 632         sizeof(EVP_AES_KEY),            \
 633         NULL,NULL,NULL,NULL }; \
 634 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
 635 { return &aes_##keylen##_##mode; }
 636
 637 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
 638 static const EVP_CIPHER aes_##keylen##_##mode = { \
 639         nid##_##keylen##_##mode,blocksize, \
 640         (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
 641         flags|EVP_CIPH_##MODE##_MODE,   \
 642         aes_##mode##_init_key,          \
 643         aes_##mode##_cipher,            \
 644         aes_##mode##_cleanup,           \
 645         sizeof(EVP_AES_##MODE##_CTX),   \
 646         NULL,NULL,aes_##mode##_ctrl,NULL }; \
 647 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
 648 { return &aes_##keylen##_##mode; }
 649 #endif
 650
 651 #define BLOCK_CIPHER_generic_pack(nid,keylen,flags)             \
 652         BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
 653         BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)      \
 654         BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 655         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 656         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags)       \
 657         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags)       \
 658         BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
 659
 660 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 661                    const unsigned char *iv, int enc)
 662         {
 663         int ret;
 664
 665         if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
 666             || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
 667             && !enc)
 668                 ret = AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 669         else
 670                 ret = AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 671
 672         if(ret < 0)
 673                 {
 674                 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
 675                 return 0;
 676                 }
 677
 678         return 1;
 679         }
 680
 681 static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 682         const unsigned char *in, size_t len)
 683 {
 684         AES_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
 685
 686         return 1;
 687 }
 688
 689 static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 690         const unsigned char *in, size_t len)
 691 {
 692         size_t  bl = ctx->cipher->block_size;
 693         size_t  i;
 694
 695         if (len<bl)     return 1;
 696
 697         if (ctx->encrypt) {
 698                 for (i=0,len-=bl;i<=len;i+=bl)
 699                         AES_encrypt(in+i,out+i,ctx->cipher_data);
 700         } else {
 701                 for (i=0,len-=bl;i<=len;i+=bl)
 702                         AES_decrypt(in+i,out+i,ctx->cipher_data);
 703         }
 704
 705         return 1;
 706 }
 707
 708 static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 709         const unsigned char *in,size_t len)
 710 {
 711         CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
 712                         ctx->iv,&ctx->num,
 713                         (block128_f)AES_encrypt);
 714         return 1;
 715 }
 716
 717 static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 718         const unsigned char *in,size_t len)
 719 {
 720         CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
 721                         ctx->iv,&ctx->num,ctx->encrypt,
 722                         (block128_f)AES_encrypt);
 723         return 1;
 724 }
 725
 726 static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 727         const unsigned char *in,size_t len)
 728 {
 729         CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
 730                         ctx->iv,&ctx->num,ctx->encrypt,
 731                         (block128_f)AES_encrypt);
 732         return 1;
 733 }
 734
 735 static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 736         const unsigned char *in,size_t len)
 737 {
 738         if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
 739                 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
 740                         ctx->iv,&ctx->num,ctx->encrypt,
 741                         (block128_f)AES_encrypt);
 742                 return 1;
 743         }
 744
 745         while (len>=MAXBITCHUNK) {
 746                 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
 747                         ctx->iv,&ctx->num,ctx->encrypt,
 748                         (block128_f)AES_encrypt);
 749                 len-=MAXBITCHUNK;
 750         }
 751         if (len)
 752                 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
 753                         ctx->iv,&ctx->num,ctx->encrypt,
 754                         (block128_f)AES_encrypt);
 755
 756         return 1;
 757 }
 758
 759 static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
 760                 const unsigned char *in, size_t len)
 761 {
 762         unsigned int num;
 763         num = ctx->num;
 764 #ifdef AES_CTR_ASM
 765         void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
 766                         size_t blocks, const AES_KEY *key,
 767                         const unsigned char ivec[AES_BLOCK_SIZE]);
 768
 769         CRYPTO_ctr128_encrypt_ctr32(in,out,len,
 770                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 771                 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
 772 #else
 773         CRYPTO_ctr128_encrypt(in,out,len,
 774                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 775                 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
 776 #endif
 777         ctx->num = (size_t)num;
 778         return 1;
 779 }
 780
 781 BLOCK_CIPHER_generic_pack(NID_aes,128,EVP_CIPH_FLAG_FIPS)
 782 BLOCK_CIPHER_generic_pack(NID_aes,192,EVP_CIPH_FLAG_FIPS)
 783 BLOCK_CIPHER_generic_pack(NID_aes,256,EVP_CIPH_FLAG_FIPS)
 784
 785 static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
 786         {
 787         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 788         OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
 789         if (gctx->iv != c->iv)
 790                 OPENSSL_free(gctx->iv);
 791         return 1;
 792         }
 793
 794 /* increment counter (64-bit int) by 1 */
 795 static void ctr64_inc(unsigned char *counter) {
 796         int n=8;
 797         unsigned char  c;
 798
 799         do {
 800                 --n;
 801                 c = counter[n];
 802                 ++c;
 803                 counter[n] = c;
 804                 if (c) return;
 805         } while (n);
 806 }
 807
 808 static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 809         {
 810         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 811         switch (type)
 812                 {
 813         case EVP_CTRL_INIT:
 814                 gctx->key_set = 0;
 815                 gctx->iv_set = 0;
 816                 gctx->ivlen = c->cipher->iv_len;
 817                 gctx->iv = c->iv;
 818                 gctx->taglen = -1;
 819                 gctx->iv_gen = 0;
 820                 gctx->tls_aad_len = -1;
 821                 return 1;
 822
 823         case EVP_CTRL_GCM_SET_IVLEN:
 824                 if (arg <= 0)
 825                         return 0;
 826 #ifdef OPENSSL_FIPS
 827                 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
 828                                                  && arg < 12)
 829                         return 0;
 830 #endif
 831                 /* Allocate memory for IV if needed */
 832                 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
 833                         {
 834                         if (gctx->iv != c->iv)
 835                                 OPENSSL_free(gctx->iv);
 836                         gctx->iv = OPENSSL_malloc(arg);
 837                         if (!gctx->iv)
 838                                 return 0;
 839                         }
 840                 gctx->ivlen = arg;
 841                 return 1;
 842
 843         case EVP_CTRL_GCM_SET_TAG:
 844                 if (arg <= 0 || arg > 16 || c->encrypt)
 845                         return 0;
 846                 memcpy(c->buf, ptr, arg);
 847                 gctx->taglen = arg;
 848                 return 1;
 849
 850         case EVP_CTRL_GCM_GET_TAG:
 851                 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
 852                         return 0;
 853                 memcpy(ptr, c->buf, arg);
 854                 return 1;
 855
 856         case EVP_CTRL_GCM_SET_IV_FIXED:
 857                 /* Special case: -1 length restores whole IV */
 858                 if (arg == -1)
 859                         {
 860                         memcpy(gctx->iv, ptr, gctx->ivlen);
 861                         gctx->iv_gen = 1;
 862                         return 1;
 863                         }
 864                 /* Fixed field must be at least 4 bytes and invocation field
 865                  * at least 8.
 866                  */
 867                 if ((arg < 4) || (gctx->ivlen - arg) < 8)
 868                         return 0;
 869                 if (arg)
 870                         memcpy(gctx->iv, ptr, arg);
 871                 if (c->encrypt &&
 872                         RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
 873                         return 0;
 874                 gctx->iv_gen = 1;
 875                 return 1;
 876
 877         case EVP_CTRL_GCM_IV_GEN:
 878                 if (gctx->iv_gen == 0 || gctx->key_set == 0)
 879                         return 0;
 880                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 881                 if (arg <= 0 || arg > gctx->ivlen)
 882                         arg = gctx->ivlen;
 883                 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
 884                 /* Invocation field will be at least 8 bytes in size and
 885                  * so no need to check wrap around or increment more than
 886                  * last 8 bytes.
 887                  */
 888                 ctr64_inc(gctx->iv + gctx->ivlen - 8);
 889                 gctx->iv_set = 1;
 890                 return 1;
 891
 892         case EVP_CTRL_GCM_SET_IV_INV:
 893                 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
 894                         return 0;
 895                 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
 896                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 897                 gctx->iv_set = 1;
 898                 return 1;
 899
 900         case EVP_CTRL_AEAD_TLS1_AAD:
 901                 /* Save the AAD for later use */
 902                 if (arg != 13)
 903                         return 0;
 904                 memcpy(c->buf, ptr, arg);
 905                 gctx->tls_aad_len = arg;
 906                         {
 907                         unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1];
 908                         /* Correct length for explicit IV */
 909                         len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
 910                         /* If decrypting correct for tag too */
 911                         if (!c->encrypt)
 912                                 len -= EVP_GCM_TLS_TAG_LEN;
 913                         c->buf[arg-2] = len>>8;
 914                         c->buf[arg-1] = len & 0xff;
 915                         }
 916                 /* Extra padding: tag appended to record */
 917                 return EVP_GCM_TLS_TAG_LEN;
 918
 919         default:
 920                 return -1;
 921
 922                 }
 923         }
 924
 925 static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 926                         const unsigned char *iv, int enc)
 927         {
 928         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 929         if (!iv && !key)
 930                 return 1;
 931         if (key)
 932                 {
 933                 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
 934                 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
 935                 /* If we have an iv can set it directly, otherwise use
 936                  * saved IV.
 937                  */
 938                 if (iv == NULL && gctx->iv_set)
 939                         iv = gctx->iv;
 940                 if (iv)
 941                         {
 942                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 943                         gctx->iv_set = 1;
 944                         }
 945                 gctx->key_set = 1;
 946                 }
 947         else
 948                 {
 949                 /* If key set use IV, otherwise copy */
 950                 if (gctx->key_set)
 951                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 952                 else
 953                         memcpy(gctx->iv, iv, gctx->ivlen);
 954                 gctx->iv_set = 1;
 955                 gctx->iv_gen = 0;
 956                 }
 957         return 1;
 958         }
 959
 960 /* Handle TLS GCM packet format. This consists of the last portion of the IV
 961  * followed by the payload and finally the tag. On encrypt generate IV,
 962  * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
 963  * and verify tag.
 964  */
 965
 966 static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 967                 const unsigned char *in, size_t len)
 968         {
 969         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 970         int rv = -1;
 971         /* Encrypt/decrypt must be performed in place */
 972         if (out != in)
 973                 return -1;
 974         /* Set IV from start of buffer or generate IV and write to start
 975          * of buffer.
 976          */
 977         if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
 978                                 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
 979                                 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
 980                 goto err;
 981         /* Use saved AAD */
 982         if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
 983                 goto err;
 984         /* Fix buffer and length to point to payload */
 985         in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 986         out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 987         len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 988         if (ctx->encrypt)
 989                 {
 990                 /* Encrypt payload */
 991                 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 992                         goto err;
 993                 out += len;
 994                 /* Finally write tag */
 995                 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
 996                 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 997                 }
 998         else
 999                 {
1000                 /* Decrypt */
1001                 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1002                         goto err;
1003                 /* Retrieve tag */
1004                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
1005                                         EVP_GCM_TLS_TAG_LEN);
1006                 /* If tag mismatch wipe buffer */
1007                 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
1008                         {
1009                         OPENSSL_cleanse(out, len);
1010                         goto err;
1011                         }
1012                 rv = len;
1013                 }
1014
1015         err:
1016         gctx->iv_set = 0;
1017         gctx->tls_aad_len = -1;
1018         return rv;
1019         }
1020
1021 static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1022                 const unsigned char *in, size_t len)
1023         {
1024         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
1025         /* If not set up, return error */
1026         if (!gctx->key_set)
1027                 return -1;
1028
1029         if (gctx->tls_aad_len >= 0)
1030                 return aes_gcm_tls_cipher(ctx, out, in, len);
1031
1032         if (!gctx->iv_set)
1033                 return -1;
1034         if (!ctx->encrypt && gctx->taglen < 0)
1035                 return -1;
1036         if (in)
1037                 {
1038                 if (out == NULL)
1039                         {
1040                         if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
1041                                 return -1;
1042                         }
1043                 else if (ctx->encrypt)
1044                         {
1045                         if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
1046                                 return -1;
1047                         }
1048                 else
1049                         {
1050                         if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1051                                 return -1;
1052                         }
1053                 return len;
1054                 }
1055         else
1056                 {
1057                 if (!ctx->encrypt)
1058                         {
1059                         if (CRYPTO_gcm128_finish(&gctx->gcm,
1060                                         ctx->buf, gctx->taglen) != 0)
1061                                 return -1;
1062                         gctx->iv_set = 0;
1063                         return 0;
1064                         }
1065                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
1066                 gctx->taglen = 16;
1067                 /* Don't reuse the IV */
1068                 gctx->iv_set = 0;
1069                 return 0;
1070                 }
1071
1072         }
1073
1074 #define CUSTOM_FLAGS    (EVP_CIPH_FLAG_DEFAULT_ASN1 \
1075                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
1076                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT)
1077
1078 BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM,
1079                 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1080 BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM,
1081                 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1082 BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM,
1083                 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1084
1085 static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1086         {
1087         EVP_AES_XTS_CTX *xctx = c->cipher_data;
1088         if (type != EVP_CTRL_INIT)
1089                 return -1;
1090         /* key1 and key2 are used as an indicator both key and IV are set */
1091         xctx->xts.key1 = NULL;
1092         xctx->xts.key2 = NULL;
1093         return 1;
1094         }
1095
1096 static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1097                         const unsigned char *iv, int enc)
1098         {
1099         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1100         if (!iv && !key)
1101                 return 1;
1102
1103         if (key)
1104                 {
1105                 /* key_len is two AES keys */
1106                 if (enc)
1107                         {
1108                         AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1109                         xctx->xts.block1 = (block128_f)AES_encrypt;
1110                         }
1111                 else
1112                         {
1113                         AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1114                         xctx->xts.block1 = (block128_f)AES_decrypt;
1115                         }
1116
1117                 AES_set_encrypt_key(key + ctx->key_len/2,
1118                                                 ctx->key_len * 4, &xctx->ks2);
1119                 xctx->xts.block2 = (block128_f)AES_encrypt;
1120
1121                 xctx->xts.key1 = &xctx->ks1;
1122                 }
1123
1124         if (iv)
1125                 {
1126                 xctx->xts.key2 = &xctx->ks2;
1127                 memcpy(ctx->iv, iv, 16);
1128                 }
1129
1130         return 1;
1131         }
1132
1133 static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1134                 const unsigned char *in, size_t len)
1135         {
1136         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1137         if (!xctx->xts.key1 || !xctx->xts.key2)
1138                 return -1;
1139         if (!out || !in)
1140                 return -1;
1141 #ifdef OPENSSL_FIPS
1142         /* Requirement of SP800-38E */
1143         if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
1144                         (len > (1L<<20)*16))
1145                 {
1146                 EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE);
1147                 return -1;
1148                 }
1149 #endif
1150         if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
1151                                                                 ctx->encrypt))
1152                 return -1;
1153         return len;
1154         }
1155
1156 #define aes_xts_cleanup NULL
1157
1158 BLOCK_CIPHER_custom(NID_aes,128,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1159 BLOCK_CIPHER_custom(NID_aes,256,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1160
1161 static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1162         {
1163         EVP_AES_CCM_CTX *cctx = c->cipher_data;
1164         switch (type)
1165                 {
1166         case EVP_CTRL_INIT:
1167                 cctx->key_set = 0;
1168                 cctx->iv_set = 0;
1169                 cctx->L = 8;
1170                 cctx->M = 12;
1171                 cctx->tag_set = 0;
1172                 cctx->len_set = 0;
1173                 return 1;
1174
1175         case EVP_CTRL_CCM_SET_IVLEN:
1176                 arg = 15 - arg;
1177         case EVP_CTRL_CCM_SET_L:
1178                 if (arg < 2 || arg > 8)
1179                         return 0;
1180                 cctx->L = arg;
1181                 return 1;
1182
1183         case EVP_CTRL_CCM_SET_TAG:
1184                 if ((arg & 1) || arg < 4 || arg > 16)
1185                         return 0;
1186                 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
1187                         return 0;
1188                 if (ptr)
1189                         {
1190                         cctx->tag_set = 1;
1191                         memcpy(c->buf, ptr, arg);
1192                         }
1193                 cctx->M = arg;
1194                 return 1;
1195
1196         case EVP_CTRL_CCM_GET_TAG:
1197                 if (!c->encrypt || !cctx->tag_set)
1198                         return 0;
1199                 if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
1200                         return 0;
1201                 cctx->tag_set = 0;
1202                 cctx->iv_set = 0;
1203                 cctx->len_set = 0;
1204                 return 1;
1205
1206         default:
1207                 return -1;
1208
1209                 }
1210         }
1211
1212 static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1213                         const unsigned char *iv, int enc)
1214         {
1215         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1216         if (!iv && !key)
1217                 return 1;
1218         if (key)
1219                 {
1220                 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
1221                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1222                                         &cctx->ks, (block128_f)AES_encrypt);
1223                 cctx->key_set = 1;
1224                 }
1225         if (iv)
1226                 {
1227                 memcpy(ctx->iv, iv, 15 - cctx->L);
1228                 cctx->iv_set = 1;
1229                 }
1230         return 1;
1231         }
1232
1233 static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1234                 const unsigned char *in, size_t len)
1235         {
1236         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1237         CCM128_CONTEXT *ccm = &cctx->ccm;
1238         /* If not set up, return error */
1239         if (!cctx->iv_set && !cctx->key_set)
1240                 return -1;
1241         if (!ctx->encrypt && !cctx->tag_set)
1242                 return -1;
1243         if (!out)
1244                 {
1245                 if (!in)
1246                         {
1247                         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
1248                                 return -1;
1249                         cctx->len_set = 1;
1250                         return len;
1251                         }
1252                 /* If have AAD need message length */
1253                 if (!cctx->len_set && len)
1254                         return -1;
1255                 CRYPTO_ccm128_aad(ccm, in, len);
1256                 return len;
1257                 }
1258         /* EVP_*Final() doesn't return any data */
1259         if (!in)
1260                 return 0;
1261         /* If not set length yet do it */
1262         if (!cctx->len_set)
1263                 {
1264                 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
1265                         return -1;
1266                 cctx->len_set = 1;
1267                 }
1268         if (ctx->encrypt)
1269                 {
1270                 if (CRYPTO_ccm128_encrypt(ccm, in, out, len))
1271                         return -1;
1272                 cctx->tag_set = 1;
1273                 return len;
1274                 }
1275         else
1276                 {
1277                 int rv = -1;
1278                 if (!CRYPTO_ccm128_decrypt(ccm, in, out, len))
1279                         {
1280                         unsigned char tag[16];
1281                         if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
1282                                 {
1283                                 if (!memcmp(tag, ctx->buf, cctx->M))
1284                                         rv = len;
1285                                 }
1286                         }
1287                 if (rv == -1)
1288                         OPENSSL_cleanse(out, len);
1289                 cctx->iv_set = 0;
1290                 cctx->tag_set = 0;
1291                 cctx->len_set = 0;
1292                 return rv;
1293                 }
1294
1295         }
1296
1297 #define aes_ccm_cleanup NULL
1298
1299 BLOCK_CIPHER_custom(NID_aes,128,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1300 BLOCK_CIPHER_custom(NID_aes,192,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1301 BLOCK_CIPHER_custom(NID_aes,256,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1302
1303 #endif