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 #include <openssl/opensslconf.h>
  52 #ifndef OPENSSL_NO_AES
  53 #include <openssl/evp.h>
  54 #include <openssl/err.h>
  55 #include <string.h>
  56 #include <assert.h>
  57 #include <openssl/aes.h>
  58 #include "evp_locl.h"
  59 #ifndef OPENSSL_FIPS
  60 #include "modes_lcl.h"
  61 #include <openssl/rand.h>
  62
  63 typedef struct
  64         {
  65         AES_KEY ks;
  66         } EVP_AES_KEY;
  67
  68 typedef struct
  69         {
  70         AES_KEY ks;             /* AES key schedule to use */
  71         int key_set;            /* Set if key initialised */
  72         int iv_set;             /* Set if an iv is set */
  73         GCM128_CONTEXT gcm;
  74         unsigned char *iv;      /* Temporary IV store */
  75         int ivlen;              /* IV length */
  76         int taglen;
  77         int iv_gen;             /* It is OK to generate IVs */
  78         int tls_aad_len;        /* TLS AAD length */
  79         } EVP_AES_GCM_CTX;
  80
  81 typedef struct
  82         {
  83         AES_KEY ks1, ks2;       /* AES key schedules to use */
  84         XTS128_CONTEXT xts;
  85         } EVP_AES_XTS_CTX;
  86
  87 typedef struct
  88         {
  89         AES_KEY ks;             /* AES key schedule to use */
  90         int key_set;            /* Set if key initialised */
  91         int iv_set;             /* Set if an iv is set */
  92         int tag_set;            /* Set if tag is valid */
  93         int len_set;            /* Set if message length set */
  94         int L, M;               /* L and M parameters from RFC3610 */
  95         CCM128_CONTEXT ccm;
  96         } EVP_AES_CCM_CTX;
  97
  98 #define MAXBITCHUNK     ((size_t)1<<(sizeof(size_t)*8-4))
  99
 100 #if     defined(AES_ASM) && !defined(I386_ONLY) &&      (  \
 101         ((defined(__i386)       || defined(__i386__)    || \
 102           defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \
 103         defined(__x86_64)       || defined(__x86_64__)  || \
 104         defined(_M_AMD64)       || defined(_M_X64)      || \
 105         defined(__INTEL__)                              )
 106 /*
 107  * AES-NI section
 108  */
 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                         goto err;
 342                 out += len;
 343                 /* Finally write tag */
 344                 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
 345                 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 346                 }
 347         else
 348                 {
 349                 /* Decrypt */
 350                 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, in, out, len,
 351                                                 aesni_ctr32_encrypt_blocks))
 352                         goto err;
 353                 /* Retrieve tag */
 354                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
 355                                         EVP_GCM_TLS_TAG_LEN);
 356                 /* If tag mismatch wipe buffer */
 357                 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
 358                         {
 359                         OPENSSL_cleanse(out, len);
 360                         goto err;
 361                         }
 362                 rv = len;
 363                 }
 364
 365         err:
 366         gctx->iv_set = 0;
 367         gctx->tls_aad_len = -1;
 368         return rv;
 369         }
 370
 371 static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 372                 const unsigned char *in, size_t len)
 373         {
 374         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 375         /* If not set up, return error */
 376         if (!gctx->key_set)
 377                 return -1;
 378
 379         if (gctx->tls_aad_len >= 0)
 380                 return aesni_gcm_tls_cipher(ctx, out, in, len);
 381
 382         if (!gctx->iv_set)
 383                 return -1;
 384         if (!ctx->encrypt && gctx->taglen < 0)
 385                 return -1;
 386         if (in)
 387                 {
 388                 if (out == NULL)
 389                         {
 390                         if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
 391                                 return -1;
 392                         }
 393                 else if (ctx->encrypt)
 394                         {
 395                         if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
 396                                         in, out, len,
 397                                         aesni_ctr32_encrypt_blocks))
 398                                 return -1;
 399                         }
 400                 else
 401                         {
 402                         if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
 403                                         in, out, len,
 404                                         aesni_ctr32_encrypt_blocks))
 405                                 return -1;
 406                         }
 407                 return len;
 408                 }
 409         else
 410                 {
 411                 if (!ctx->encrypt)
 412                         {
 413                         if (CRYPTO_gcm128_finish(&gctx->gcm,
 414                                         ctx->buf, gctx->taglen) != 0)
 415                                 return -1;
 416                         gctx->iv_set = 0;
 417                         return 0;
 418                         }
 419                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
 420                 gctx->taglen = 16;
 421                 /* Don't reuse the IV */
 422                 gctx->iv_set = 0;
 423                 return 0;
 424                 }
 425
 426         }
 427
 428 static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 429                         const unsigned char *iv, int enc)
 430         {
 431         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 432         if (!iv && !key)
 433                 return 1;
 434
 435         if (key)
 436                 {
 437                 /* key_len is two AES keys */
 438                 if (enc)
 439                         {
 440                         aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
 441                         xctx->xts.block1 = (block128_f)aesni_encrypt;
 442                         }
 443                 else
 444                         {
 445                         aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
 446                         xctx->xts.block1 = (block128_f)aesni_decrypt;
 447                         }
 448
 449                 aesni_set_encrypt_key(key + ctx->key_len/2,
 450                                                 ctx->key_len * 4, &xctx->ks2);
 451                 xctx->xts.block2 = (block128_f)aesni_encrypt;
 452
 453                 xctx->xts.key1 = &xctx->ks1;
 454                 }
 455
 456         if (iv)
 457                 {
 458                 xctx->xts.key2 = &xctx->ks2;
 459                 memcpy(ctx->iv, iv, 16);
 460                 }
 461
 462         return 1;
 463         }
 464
 465 static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 466                 const unsigned char *in, size_t len)
 467         {
 468         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 469         if (!xctx->xts.key1 || !xctx->xts.key2)
 470                 return -1;
 471         if (!out || !in)
 472                 return -1;
 473 #ifdef OPENSSL_FIPS
 474         /* Requirement of SP800-38E */
 475         if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
 476                         (len > (1L<<20)*16))
 477                 {
 478                 EVPerr(EVP_F_AESNI_XTS_CIPHER, EVP_R_TOO_LARGE);
 479                 return -1;
 480                 }
 481 #endif
 482         if (ctx->encrypt)
 483                 aesni_xts_encrypt(in, out, len,
 484                         xctx->xts.key1, xctx->xts.key2, ctx->iv);
 485         else
 486                 aesni_xts_decrypt(in, out, len,
 487                         xctx->xts.key1, xctx->xts.key2, ctx->iv);
 488
 489         return len;
 490         }
 491
 492 static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 493                         const unsigned char *iv, int enc)
 494         {
 495         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 496         if (!iv && !key)
 497                 return 1;
 498         if (key)
 499                 {
 500                 aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
 501                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 502                                         &cctx->ks, (block128_f)aesni_encrypt);
 503                 cctx->key_set = 1;
 504                 }
 505         if (iv)
 506                 {
 507                 memcpy(ctx->iv, iv, 15 - cctx->L);
 508                 cctx->iv_set = 1;
 509                 }
 510         return 1;
 511         }
 512
 513 static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 514                 const unsigned char *in, size_t len)
 515         {
 516         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 517         CCM128_CONTEXT *ccm = &cctx->ccm;
 518         /* If not set up, return error */
 519         if (!cctx->iv_set && !cctx->key_set)
 520                 return -1;
 521         if (!ctx->encrypt && !cctx->tag_set)
 522                 return -1;
 523         if (!out)
 524                 {
 525                 if (!in)
 526                         {
 527                         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
 528                                 return -1;
 529                         cctx->len_set = 1;
 530                         return len;
 531                         }
 532                 /* If have AAD need message length */
 533                 if (!cctx->len_set && len)
 534                         return -1;
 535                 CRYPTO_ccm128_aad(ccm, in, len);
 536                 return len;
 537                 }
 538         /* EVP_*Final() doesn't return any data */
 539         if (!in)
 540                 return 0;
 541         /* If not set length yet do it */
 542         if (!cctx->len_set)
 543                 {
 544                 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
 545                         return -1;
 546                 cctx->len_set = 1;
 547                 }
 548         if (ctx->encrypt)
 549                 {
 550                 if (CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
 551                                 aesni_ccm64_encrypt_blocks))
 552                         return -1;
 553                 cctx->tag_set = 1;
 554                 return len;
 555                 }
 556         else
 557                 {
 558                 int rv = -1;
 559                 if (!CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
 560                                 aesni_ccm64_decrypt_blocks))
 561                         {
 562                         unsigned char tag[16];
 563                         if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
 564                                 {
 565                                 if (!memcmp(tag, ctx->buf, cctx->M))
 566                                         rv = len;
 567                                 }
 568                         }
 569                 if (rv == -1)
 570                         OPENSSL_cleanse(out, len);
 571                 cctx->iv_set = 0;
 572                 cctx->tag_set = 0;
 573                 cctx->len_set = 0;
 574                 return rv;
 575                 }
 576
 577         }
 578
 579 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 580 static const EVP_CIPHER aesni_##keylen##_##mode = { \
 581         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 582         flags|EVP_CIPH_##MODE##_MODE,   \
 583         aesni_init_key,                 \
 584         aesni_##mode##_cipher,          \
 585         NULL,                           \
 586         sizeof(EVP_AES_KEY),            \
 587         NULL,NULL,NULL,NULL }; \
 588 static const EVP_CIPHER aes_##keylen##_##mode = { \
 589         nid##_##keylen##_##nmode,blocksize,     \
 590         keylen/8,ivlen, \
 591         flags|EVP_CIPH_##MODE##_MODE,   \
 592         aes_init_key,                   \
 593         aes_##mode##_cipher,            \
 594         NULL,                           \
 595         sizeof(EVP_AES_KEY),            \
 596         NULL,NULL,NULL,NULL }; \
 597 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
 598 { return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
 599   &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
 600
 601 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
 602 static const EVP_CIPHER aesni_##keylen##_##mode = { \
 603         nid##_##keylen##_##mode,blocksize, \
 604         (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
 605         flags|EVP_CIPH_##MODE##_MODE,   \
 606         aesni_##mode##_init_key,        \
 607         aesni_##mode##_cipher,          \
 608         aes_##mode##_cleanup,           \
 609         sizeof(EVP_AES_##MODE##_CTX),   \
 610         NULL,NULL,aes_##mode##_ctrl,NULL }; \
 611 static const EVP_CIPHER aes_##keylen##_##mode = { \
 612         nid##_##keylen##_##mode,blocksize, \
 613         (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
 614         flags|EVP_CIPH_##MODE##_MODE,   \
 615         aes_##mode##_init_key,          \
 616         aes_##mode##_cipher,            \
 617         aes_##mode##_cleanup,           \
 618         sizeof(EVP_AES_##MODE##_CTX),   \
 619         NULL,NULL,aes_##mode##_ctrl,NULL }; \
 620 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
 621 { return (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)? \
 622   &aesni_##keylen##_##mode:&aes_##keylen##_##mode; }
 623
 624 #else
 625
 626 #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 627 static const EVP_CIPHER aes_##keylen##_##mode = { \
 628         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 629         flags|EVP_CIPH_##MODE##_MODE,   \
 630         aes_init_key,                   \
 631         aes_##mode##_cipher,            \
 632         NULL,                           \
 633         sizeof(EVP_AES_KEY),            \
 634         NULL,NULL,NULL,NULL }; \
 635 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
 636 { return &aes_##keylen##_##mode; }
 637
 638 #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \
 639 static const EVP_CIPHER aes_##keylen##_##mode = { \
 640         nid##_##keylen##_##mode,blocksize, \
 641         (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \
 642         flags|EVP_CIPH_##MODE##_MODE,   \
 643         aes_##mode##_init_key,          \
 644         aes_##mode##_cipher,            \
 645         aes_##mode##_cleanup,           \
 646         sizeof(EVP_AES_##MODE##_CTX),   \
 647         NULL,NULL,aes_##mode##_ctrl,NULL }; \
 648 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
 649 { return &aes_##keylen##_##mode; }
 650 #endif
 651
 652 #define BLOCK_CIPHER_generic_pack(nid,keylen,flags)             \
 653         BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
 654         BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)      \
 655         BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 656         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 657         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags)       \
 658         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags)       \
 659         BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
 660
 661 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 662                    const unsigned char *iv, int enc)
 663         {
 664         int ret;
 665
 666         if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
 667             || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
 668             && !enc)
 669                 ret = AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 670         else
 671                 ret = AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 672
 673         if(ret < 0)
 674                 {
 675                 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
 676                 return 0;
 677                 }
 678
 679         return 1;
 680         }
 681
 682 static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 683         const unsigned char *in, size_t len)
 684 {
 685         AES_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
 686
 687         return 1;
 688 }
 689
 690 static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 691         const unsigned char *in, size_t len)
 692 {
 693         size_t  bl = ctx->cipher->block_size;
 694         size_t  i;
 695
 696         if (len<bl)     return 1;
 697
 698         if (ctx->encrypt) {
 699                 for (i=0,len-=bl;i<=len;i+=bl)
 700                         AES_encrypt(in+i,out+i,ctx->cipher_data);
 701         } else {
 702                 for (i=0,len-=bl;i<=len;i+=bl)
 703                         AES_decrypt(in+i,out+i,ctx->cipher_data);
 704         }
 705
 706         return 1;
 707 }
 708
 709 static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 710         const unsigned char *in,size_t len)
 711 {
 712         CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
 713                         ctx->iv,&ctx->num,
 714                         (block128_f)AES_encrypt);
 715         return 1;
 716 }
 717
 718 static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 719         const unsigned char *in,size_t len)
 720 {
 721         CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
 722                         ctx->iv,&ctx->num,ctx->encrypt,
 723                         (block128_f)AES_encrypt);
 724         return 1;
 725 }
 726
 727 static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 728         const unsigned char *in,size_t len)
 729 {
 730         CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
 731                         ctx->iv,&ctx->num,ctx->encrypt,
 732                         (block128_f)AES_encrypt);
 733         return 1;
 734 }
 735
 736 static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 737         const unsigned char *in,size_t len)
 738 {
 739         if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
 740                 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
 741                         ctx->iv,&ctx->num,ctx->encrypt,
 742                         (block128_f)AES_encrypt);
 743                 return 1;
 744         }
 745
 746         while (len>=MAXBITCHUNK) {
 747                 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
 748                         ctx->iv,&ctx->num,ctx->encrypt,
 749                         (block128_f)AES_encrypt);
 750                 len-=MAXBITCHUNK;
 751         }
 752         if (len)
 753                 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
 754                         ctx->iv,&ctx->num,ctx->encrypt,
 755                         (block128_f)AES_encrypt);
 756
 757         return 1;
 758 }
 759
 760 static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
 761                 const unsigned char *in, size_t len)
 762 {
 763         unsigned int num;
 764         num = ctx->num;
 765 #ifdef AES_CTR_ASM
 766         void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
 767                         size_t blocks, const AES_KEY *key,
 768                         const unsigned char ivec[AES_BLOCK_SIZE]);
 769
 770         CRYPTO_ctr128_encrypt_ctr32(in,out,len,
 771                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 772                 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
 773 #else
 774         CRYPTO_ctr128_encrypt(in,out,len,
 775                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 776                 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
 777 #endif
 778         ctx->num = (size_t)num;
 779         return 1;
 780 }
 781
 782 BLOCK_CIPHER_generic_pack(NID_aes,128,EVP_CIPH_FLAG_FIPS)
 783 BLOCK_CIPHER_generic_pack(NID_aes,192,EVP_CIPH_FLAG_FIPS)
 784 BLOCK_CIPHER_generic_pack(NID_aes,256,EVP_CIPH_FLAG_FIPS)
 785
 786 static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
 787         {
 788         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 789         OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
 790         if (gctx->iv != c->iv)
 791                 OPENSSL_free(gctx->iv);
 792         return 1;
 793         }
 794
 795 /* increment counter (64-bit int) by 1 */
 796 static void ctr64_inc(unsigned char *counter) {
 797         int n=8;
 798         unsigned char  c;
 799
 800         do {
 801                 --n;
 802                 c = counter[n];
 803                 ++c;
 804                 counter[n] = c;
 805                 if (c) return;
 806         } while (n);
 807 }
 808
 809 static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 810         {
 811         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 812         switch (type)
 813                 {
 814         case EVP_CTRL_INIT:
 815                 gctx->key_set = 0;
 816                 gctx->iv_set = 0;
 817                 gctx->ivlen = c->cipher->iv_len;
 818                 gctx->iv = c->iv;
 819                 gctx->taglen = -1;
 820                 gctx->iv_gen = 0;
 821                 gctx->tls_aad_len = -1;
 822                 return 1;
 823
 824         case EVP_CTRL_GCM_SET_IVLEN:
 825                 if (arg <= 0)
 826                         return 0;
 827 #ifdef OPENSSL_FIPS
 828                 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
 829                                                  && arg < 12)
 830                         return 0;
 831 #endif
 832                 /* Allocate memory for IV if needed */
 833                 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
 834                         {
 835                         if (gctx->iv != c->iv)
 836                                 OPENSSL_free(gctx->iv);
 837                         gctx->iv = OPENSSL_malloc(arg);
 838                         if (!gctx->iv)
 839                                 return 0;
 840                         }
 841                 gctx->ivlen = arg;
 842                 return 1;
 843
 844         case EVP_CTRL_GCM_SET_TAG:
 845                 if (arg <= 0 || arg > 16 || c->encrypt)
 846                         return 0;
 847                 memcpy(c->buf, ptr, arg);
 848                 gctx->taglen = arg;
 849                 return 1;
 850
 851         case EVP_CTRL_GCM_GET_TAG:
 852                 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
 853                         return 0;
 854                 memcpy(ptr, c->buf, arg);
 855                 return 1;
 856
 857         case EVP_CTRL_GCM_SET_IV_FIXED:
 858                 /* Special case: -1 length restores whole IV */
 859                 if (arg == -1)
 860                         {
 861                         memcpy(gctx->iv, ptr, gctx->ivlen);
 862                         gctx->iv_gen = 1;
 863                         return 1;
 864                         }
 865                 /* Fixed field must be at least 4 bytes and invocation field
 866                  * at least 8.
 867                  */
 868                 if ((arg < 4) || (gctx->ivlen - arg) < 8)
 869                         return 0;
 870                 if (arg)
 871                         memcpy(gctx->iv, ptr, arg);
 872                 if (c->encrypt &&
 873                         RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
 874                         return 0;
 875                 gctx->iv_gen = 1;
 876                 return 1;
 877
 878         case EVP_CTRL_GCM_IV_GEN:
 879                 if (gctx->iv_gen == 0 || gctx->key_set == 0)
 880                         return 0;
 881                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 882                 if (arg <= 0 || arg > gctx->ivlen)
 883                         arg = gctx->ivlen;
 884                 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
 885                 /* Invocation field will be at least 8 bytes in size and
 886                  * so no need to check wrap around or increment more than
 887                  * last 8 bytes.
 888                  */
 889                 ctr64_inc(gctx->iv + gctx->ivlen - 8);
 890                 gctx->iv_set = 1;
 891                 return 1;
 892
 893         case EVP_CTRL_GCM_SET_IV_INV:
 894                 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
 895                         return 0;
 896                 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
 897                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 898                 gctx->iv_set = 1;
 899                 return 1;
 900
 901         case EVP_CTRL_AEAD_TLS1_AAD:
 902                 /* Save the AAD for later use */
 903                 if (arg != 13)
 904                         return 0;
 905                 memcpy(c->buf, ptr, arg);
 906                 gctx->tls_aad_len = arg;
 907                         {
 908                         unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1];
 909                         /* Correct length for explicit IV */
 910                         len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
 911                         /* If decrypting correct for tag too */
 912                         if (!c->encrypt)
 913                                 len -= EVP_GCM_TLS_TAG_LEN;
 914                         c->buf[arg-2] = len>>8;
 915                         c->buf[arg-1] = len & 0xff;
 916                         }
 917                 /* Extra padding: tag appended to record */
 918                 return EVP_GCM_TLS_TAG_LEN;
 919
 920         default:
 921                 return -1;
 922
 923                 }
 924         }
 925
 926 static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 927                         const unsigned char *iv, int enc)
 928         {
 929         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 930         if (!iv && !key)
 931                 return 1;
 932         if (key)
 933                 {
 934                 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
 935                 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
 936                 /* If we have an iv can set it directly, otherwise use
 937                  * saved IV.
 938                  */
 939                 if (iv == NULL && gctx->iv_set)
 940                         iv = gctx->iv;
 941                 if (iv)
 942                         {
 943                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 944                         gctx->iv_set = 1;
 945                         }
 946                 gctx->key_set = 1;
 947                 }
 948         else
 949                 {
 950                 /* If key set use IV, otherwise copy */
 951                 if (gctx->key_set)
 952                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 953                 else
 954                         memcpy(gctx->iv, iv, gctx->ivlen);
 955                 gctx->iv_set = 1;
 956                 gctx->iv_gen = 0;
 957                 }
 958         return 1;
 959         }
 960
 961 /* Handle TLS GCM packet format. This consists of the last portion of the IV
 962  * followed by the payload and finally the tag. On encrypt generate IV,
 963  * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
 964  * and verify tag.
 965  */
 966
 967 static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 968                 const unsigned char *in, size_t len)
 969         {
 970         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 971         int rv = -1;
 972         /* Encrypt/decrypt must be performed in place */
 973         if (out != in)
 974                 return -1;
 975         /* Set IV from start of buffer or generate IV and write to start
 976          * of buffer.
 977          */
 978         if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
 979                                 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
 980                                 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
 981                 goto err;
 982         /* Use saved AAD */
 983         if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
 984                 goto err;
 985         /* Fix buffer and length to point to payload */
 986         in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 987         out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 988         len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 989         if (ctx->encrypt)
 990                 {
 991                 /* Encrypt payload */
 992                 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 993                         goto err;
 994                 out += len;
 995                 /* Finally write tag */
 996                 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
 997                 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 998                 }
 999         else
1000                 {
1001                 /* Decrypt */
1002                 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1003                         goto err;
1004                 /* Retrieve tag */
1005                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf,
1006                                         EVP_GCM_TLS_TAG_LEN);
1007                 /* If tag mismatch wipe buffer */
1008                 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN))
1009                         {
1010                         OPENSSL_cleanse(out, len);
1011                         goto err;
1012                         }
1013                 rv = len;
1014                 }
1015
1016         err:
1017         gctx->iv_set = 0;
1018         gctx->tls_aad_len = -1;
1019         return rv;
1020         }
1021
1022 static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1023                 const unsigned char *in, size_t len)
1024         {
1025         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
1026         /* If not set up, return error */
1027         if (!gctx->key_set)
1028                 return -1;
1029
1030         if (gctx->tls_aad_len >= 0)
1031                 return aes_gcm_tls_cipher(ctx, out, in, len);
1032
1033         if (!gctx->iv_set)
1034                 return -1;
1035         if (!ctx->encrypt && gctx->taglen < 0)
1036                 return -1;
1037         if (in)
1038                 {
1039                 if (out == NULL)
1040                         {
1041                         if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
1042                                 return -1;
1043                         }
1044                 else if (ctx->encrypt)
1045                         {
1046                         if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
1047                                 return -1;
1048                         }
1049                 else
1050                         {
1051                         if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
1052                                 return -1;
1053                         }
1054                 return len;
1055                 }
1056         else
1057                 {
1058                 if (!ctx->encrypt)
1059                         {
1060                         if (CRYPTO_gcm128_finish(&gctx->gcm,
1061                                         ctx->buf, gctx->taglen) != 0)
1062                                 return -1;
1063                         gctx->iv_set = 0;
1064                         return 0;
1065                         }
1066                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
1067                 gctx->taglen = 16;
1068                 /* Don't reuse the IV */
1069                 gctx->iv_set = 0;
1070                 return 0;
1071                 }
1072
1073         }
1074
1075 #define CUSTOM_FLAGS    (EVP_CIPH_FLAG_DEFAULT_ASN1 \
1076                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
1077                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT)
1078
1079 BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM,
1080                 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1081 BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM,
1082                 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1083 BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM,
1084                 EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1085
1086 static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1087         {
1088         EVP_AES_XTS_CTX *xctx = c->cipher_data;
1089         if (type != EVP_CTRL_INIT)
1090                 return -1;
1091         /* key1 and key2 are used as an indicator both key and IV are set */
1092         xctx->xts.key1 = NULL;
1093         xctx->xts.key2 = NULL;
1094         return 1;
1095         }
1096
1097 static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1098                         const unsigned char *iv, int enc)
1099         {
1100         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1101         if (!iv && !key)
1102                 return 1;
1103
1104         if (key)
1105                 {
1106                 /* key_len is two AES keys */
1107                 if (enc)
1108                         {
1109                         AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1110                         xctx->xts.block1 = (block128_f)AES_encrypt;
1111                         }
1112                 else
1113                         {
1114                         AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1115                         xctx->xts.block1 = (block128_f)AES_decrypt;
1116                         }
1117
1118                 AES_set_encrypt_key(key + ctx->key_len/2,
1119                                                 ctx->key_len * 4, &xctx->ks2);
1120                 xctx->xts.block2 = (block128_f)AES_encrypt;
1121
1122                 xctx->xts.key1 = &xctx->ks1;
1123                 }
1124
1125         if (iv)
1126                 {
1127                 xctx->xts.key2 = &xctx->ks2;
1128                 memcpy(ctx->iv, iv, 16);
1129                 }
1130
1131         return 1;
1132         }
1133
1134 static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1135                 const unsigned char *in, size_t len)
1136         {
1137         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1138         if (!xctx->xts.key1 || !xctx->xts.key2)
1139                 return -1;
1140         if (!out || !in)
1141                 return -1;
1142 #ifdef OPENSSL_FIPS
1143         /* Requirement of SP800-38E */
1144         if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
1145                         (len > (1L<<20)*16))
1146                 {
1147                 EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE);
1148                 return -1;
1149                 }
1150 #endif
1151         if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
1152                                                                 ctx->encrypt))
1153                 return -1;
1154         return len;
1155         }
1156
1157 #define aes_xts_cleanup NULL
1158
1159 BLOCK_CIPHER_custom(NID_aes,128,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1160 BLOCK_CIPHER_custom(NID_aes,256,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1161
1162 static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1163         {
1164         EVP_AES_CCM_CTX *cctx = c->cipher_data;
1165         switch (type)
1166                 {
1167         case EVP_CTRL_INIT:
1168                 cctx->key_set = 0;
1169                 cctx->iv_set = 0;
1170                 cctx->L = 8;
1171                 cctx->M = 12;
1172                 cctx->tag_set = 0;
1173                 cctx->len_set = 0;
1174                 return 1;
1175
1176         case EVP_CTRL_CCM_SET_IVLEN:
1177                 arg = 15 - arg;
1178         case EVP_CTRL_CCM_SET_L:
1179                 if (arg < 2 || arg > 8)
1180                         return 0;
1181                 cctx->L = arg;
1182                 return 1;
1183
1184         case EVP_CTRL_CCM_SET_TAG:
1185                 if ((arg & 1) || arg < 4 || arg > 16)
1186                         return 0;
1187                 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
1188                         return 0;
1189                 if (ptr)
1190                         {
1191                         cctx->tag_set = 1;
1192                         memcpy(c->buf, ptr, arg);
1193                         }
1194                 cctx->M = arg;
1195                 return 1;
1196
1197         case EVP_CTRL_CCM_GET_TAG:
1198                 if (!c->encrypt || !cctx->tag_set)
1199                         return 0;
1200                 if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
1201                         return 0;
1202                 cctx->tag_set = 0;
1203                 cctx->iv_set = 0;
1204                 cctx->len_set = 0;
1205                 return 1;
1206
1207         default:
1208                 return -1;
1209
1210                 }
1211         }
1212
1213 static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1214                         const unsigned char *iv, int enc)
1215         {
1216         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1217         if (!iv && !key)
1218                 return 1;
1219         if (key)
1220                 {
1221                 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
1222                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1223                                         &cctx->ks, (block128_f)AES_encrypt);
1224                 cctx->key_set = 1;
1225                 }
1226         if (iv)
1227                 {
1228                 memcpy(ctx->iv, iv, 15 - cctx->L);
1229                 cctx->iv_set = 1;
1230                 }
1231         return 1;
1232         }
1233
1234 static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1235                 const unsigned char *in, size_t len)
1236         {
1237         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1238         CCM128_CONTEXT *ccm = &cctx->ccm;
1239         /* If not set up, return error */
1240         if (!cctx->iv_set && !cctx->key_set)
1241                 return -1;
1242         if (!ctx->encrypt && !cctx->tag_set)
1243                 return -1;
1244         if (!out)
1245                 {
1246                 if (!in)
1247                         {
1248                         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
1249                                 return -1;
1250                         cctx->len_set = 1;
1251                         return len;
1252                         }
1253                 /* If have AAD need message length */
1254                 if (!cctx->len_set && len)
1255                         return -1;
1256                 CRYPTO_ccm128_aad(ccm, in, len);
1257                 return len;
1258                 }
1259         /* EVP_*Final() doesn't return any data */
1260         if (!in)
1261                 return 0;
1262         /* If not set length yet do it */
1263         if (!cctx->len_set)
1264                 {
1265                 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
1266                         return -1;
1267                 cctx->len_set = 1;
1268                 }
1269         if (ctx->encrypt)
1270                 {
1271                 if (CRYPTO_ccm128_encrypt(ccm, in, out, len))
1272                         return -1;
1273                 cctx->tag_set = 1;
1274                 return len;
1275                 }
1276         else
1277                 {
1278                 int rv = -1;
1279                 if (!CRYPTO_ccm128_decrypt(ccm, in, out, len))
1280                         {
1281                         unsigned char tag[16];
1282                         if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
1283                                 {
1284                                 if (!memcmp(tag, ctx->buf, cctx->M))
1285                                         rv = len;
1286                                 }
1287                         }
1288                 if (rv == -1)
1289                         OPENSSL_cleanse(out, len);
1290                 cctx->iv_set = 0;
1291                 cctx->tag_set = 0;
1292                 cctx->len_set = 0;
1293                 return rv;
1294                 }
1295
1296         }
1297
1298 #define aes_ccm_cleanup NULL
1299
1300 BLOCK_CIPHER_custom(NID_aes,128,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1301 BLOCK_CIPHER_custom(NID_aes,192,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1302 BLOCK_CIPHER_custom(NID_aes,256,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1303
1304 #endif
1305 #endif