crypto/evp/e_aes.c

   1 /* ====================================================================
   2  * Copyright (c) 2001 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 #if     defined(AES_ASM) && !defined(I386_ONLY) &&      (  \
  70         ((defined(__i386)       || defined(__i386__)    || \
  71           defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \
  72         defined(__x86_64)       || defined(__x86_64__)  || \
  73         defined(_M_AMD64)       || defined(_M_X64)      || \
  74         defined(__INTEL__)                              )
  75
  76 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
  77                               AES_KEY *key);
  78 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
  79                               AES_KEY *key);
  80
  81 void aesni_encrypt(const unsigned char *in, unsigned char *out,
  82                        const AES_KEY *key);
  83 void aesni_decrypt(const unsigned char *in, unsigned char *out,
  84                        const AES_KEY *key);
  85
  86 void aesni_ecb_encrypt(const unsigned char *in,
  87                            unsigned char *out,
  88                            size_t length,
  89                            const AES_KEY *key,
  90                            int enc);
  91 void aesni_cbc_encrypt(const unsigned char *in,
  92                            unsigned char *out,
  93                            size_t length,
  94                            const AES_KEY *key,
  95                            unsigned char *ivec, int enc);
  96
  97 void aesni_ctr32_encrypt_blocks(const unsigned char *in,
  98                            unsigned char *out,
  99                            size_t blocks,
 100                            const void *key,
 101                            const unsigned char *ivec);
 102
 103 extern unsigned int OPENSSL_ia32cap_P[2];
 104 #define AESNI_CAPABLE   (1<<(57-32))
 105
 106 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 107                    const unsigned char *iv, int enc)
 108         {
 109         int ret;
 110
 111         if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
 112             || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
 113             && !enc)
 114                 ret = OPENSSL_ia32cap_P[1]&AESNI_CAPABLE ?
 115                         aesni_set_decrypt_key(key, ctx->key_len*8, ctx->cipher_data):
 116                         AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 117         else
 118                 ret = OPENSSL_ia32cap_P[1]&AESNI_CAPABLE ?
 119                         aesni_set_encrypt_key(key, ctx->key_len*8, ctx->cipher_data):
 120                         AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 121
 122         if(ret < 0)
 123                 {
 124                 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
 125                 return 0;
 126                 }
 127
 128         return 1;
 129         }
 130
 131 static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 132         const unsigned char *in, size_t len)
 133 {
 134         if (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)
 135                 aesni_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
 136         else
 137                 AES_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt);
 138
 139         return 1;
 140 }
 141
 142 static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 143         const unsigned char *in, size_t len)
 144 {
 145         size_t  bl = ctx->cipher->block_size;
 146
 147         if (len<bl)     return 1;
 148
 149         if (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)
 150                 aesni_ecb_encrypt(in,out,len,ctx->cipher_data,ctx->encrypt);
 151         else {
 152                 size_t i;
 153
 154                 if (ctx->encrypt) {
 155                         for (i=0,len-=bl;i<=len;i+=bl)
 156                                 AES_encrypt(in+i,out+i,ctx->cipher_data);
 157                 } else {
 158                         for (i=0,len-=bl;i<=len;i+=bl)
 159                                 AES_decrypt(in+i,out+i,ctx->cipher_data);
 160                 }
 161         }
 162
 163         return 1;
 164 }
 165
 166 static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 167         const unsigned char *in,size_t len)
 168 {
 169         CRYPTO_ofb128_encrypt(in,out,len,ctx->cipher_data,
 170                         ctx->iv,&ctx->num,
 171                         OPENSSL_ia32cap_P[1]&AESNI_CAPABLE ?
 172                                 (block128_f)aesni_encrypt  :
 173                                 (block128_f)AES_encrypt);
 174         return 1;
 175 }
 176
 177 static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 178         const unsigned char *in,size_t len)
 179 {
 180         CRYPTO_cfb128_encrypt(in,out,len,ctx->cipher_data,
 181                         ctx->iv,&ctx->num,ctx->encrypt,
 182                         OPENSSL_ia32cap_P[1]&AESNI_CAPABLE ?
 183                                 (block128_f)aesni_encrypt  :
 184                                 (block128_f)AES_encrypt);
 185         return 1;
 186 }
 187
 188 static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 189         const unsigned char *in,size_t len)
 190 {
 191         CRYPTO_cfb128_8_encrypt(in,out,len,ctx->cipher_data,
 192                         ctx->iv,&ctx->num,ctx->encrypt,
 193                         OPENSSL_ia32cap_P[1]&AESNI_CAPABLE ?
 194                                 (block128_f)aesni_encrypt  :
 195                                 (block128_f)AES_encrypt);
 196         return 1;
 197 }
 198
 199 static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 200         const unsigned char *in,size_t len)
 201 {
 202         CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
 203                         ctx->iv,&ctx->num,ctx->encrypt,
 204                         OPENSSL_ia32cap_P[1]&AESNI_CAPABLE ?
 205                                 (block128_f)aesni_encrypt  :
 206                                 (block128_f)AES_encrypt);
 207         return 1;
 208 }
 209
 210 static int aes_counter(EVP_CIPHER_CTX *ctx, unsigned char *out,
 211                 const unsigned char *in, size_t len)
 212 {
 213         unsigned int num;
 214         num = ctx->num;
 215
 216         if (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)
 217                 CRYPTO_ctr128_encrypt_ctr32(in,out,len,
 218                         ctx->cipher_data,ctx->iv,ctx->buf,&num,
 219                         (ctr128_f)aesni_ctr32_encrypt_blocks);
 220         else
 221                 CRYPTO_ctr128_encrypt(in,out,len,
 222                         ctx->cipher_data,ctx->iv,ctx->buf,&num,
 223                         (block128_f)AES_encrypt);
 224         ctx->num = (size_t)num;
 225         return 1;
 226 }
 227
 228 #define BLOCK_CIPHER_mydef(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 229 static const EVP_CIPHER aes_##keylen##_##mode = { \
 230         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 231         flags|EVP_CIPH_##MODE##_MODE, \
 232         aes_init_key,aes_##mode##_cipher,NULL,sizeof(EVP_AES_KEY), \
 233         NULL,NULL,NULL,NULL }; \
 234 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) { return &aes_##keylen##_##mode; }
 235
 236 #define BLOCK_CIPHER_mydefs(nid,keylen,flags)           \
 237         BLOCK_CIPHER_mydef(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)       \
 238         BLOCK_CIPHER_mydef(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)        \
 239         BLOCK_CIPHER_mydef(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
 240         BLOCK_CIPHER_mydef(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
 241         BLOCK_CIPHER_mydef(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \
 242         BLOCK_CIPHER_mydef(nid,keylen,1,16,cfb8,cfb8,CFB,flags)
 243
 244 BLOCK_CIPHER_mydefs(NID_aes,128,EVP_CIPH_FLAG_FIPS)
 245 BLOCK_CIPHER_mydefs(NID_aes,192,EVP_CIPH_FLAG_FIPS)
 246 BLOCK_CIPHER_mydefs(NID_aes,256,EVP_CIPH_FLAG_FIPS)
 247
 248 #else
 249
 250 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 251                    const unsigned char *iv, int enc)
 252         {
 253         int ret;
 254
 255         if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
 256             || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
 257             && !enc)
 258                 ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 259         else
 260                 ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 261
 262         if(ret < 0)
 263                 {
 264                 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
 265                 return 0;
 266                 }
 267
 268         return 1;
 269         }
 270
 271 #define data(ctx)       EVP_C_DATA(EVP_AES_KEY,ctx)
 272
 273 IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY,
 274                        NID_aes_128, 16, 16, 16, 128,
 275                        EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
 276                        aes_init_key, NULL, NULL, NULL, NULL)
 277 IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY,
 278                        NID_aes_192, 16, 24, 16, 128,
 279                        EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
 280                        aes_init_key, NULL, NULL, NULL, NULL)
 281 IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY,
 282                        NID_aes_256, 16, 32, 16, 128,
 283                        EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
 284                        aes_init_key, NULL, NULL, NULL, NULL)
 285
 286 #define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16,EVP_CIPH_FLAG_FIPS)
 287
 288 IMPLEMENT_AES_CFBR(128,1)
 289 IMPLEMENT_AES_CFBR(192,1)
 290 IMPLEMENT_AES_CFBR(256,1)
 291
 292 IMPLEMENT_AES_CFBR(128,8)
 293 IMPLEMENT_AES_CFBR(192,8)
 294 IMPLEMENT_AES_CFBR(256,8)
 295
 296 static int aes_counter (EVP_CIPHER_CTX *ctx, unsigned char *out,
 297                 const unsigned char *in, size_t len)
 298 {
 299         unsigned int num;
 300         num = ctx->num;
 301 #ifdef AES_CTR_ASM
 302         void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
 303                         size_t blocks, const AES_KEY *key,
 304                         const unsigned char ivec[AES_BLOCK_SIZE]);
 305
 306         CRYPTO_ctr128_encrypt_ctr32(in,out,len,
 307                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 308                 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
 309 #else
 310         CRYPTO_ctr128_encrypt(in,out,len,
 311                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 312                 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
 313 #endif
 314         ctx->num = (size_t)num;
 315         return 1;
 316 }
 317
 318 #endif
 319
 320 static const EVP_CIPHER aes_128_ctr_cipher=
 321         {
 322         NID_aes_128_ctr,1,16,16,
 323         EVP_CIPH_CTR_MODE|EVP_CIPH_FLAG_FIPS,
 324         aes_init_key,
 325         aes_counter,
 326         NULL,
 327         sizeof(EVP_AES_KEY),
 328         NULL,
 329         NULL,
 330         NULL,
 331         NULL
 332         };
 333
 334 const EVP_CIPHER *EVP_aes_128_ctr (void)
 335 {       return &aes_128_ctr_cipher;     }
 336
 337 static const EVP_CIPHER aes_192_ctr_cipher=
 338         {
 339         NID_aes_192_ctr,1,24,16,
 340         EVP_CIPH_CTR_MODE|EVP_CIPH_FLAG_FIPS,
 341         aes_init_key,
 342         aes_counter,
 343         NULL,
 344         sizeof(EVP_AES_KEY),
 345         NULL,
 346         NULL,
 347         NULL,
 348         NULL
 349         };
 350
 351 const EVP_CIPHER *EVP_aes_192_ctr (void)
 352 {       return &aes_192_ctr_cipher;     }
 353
 354 static const EVP_CIPHER aes_256_ctr_cipher=
 355         {
 356         NID_aes_256_ctr,1,32,16,
 357         EVP_CIPH_CTR_MODE|EVP_CIPH_FLAG_FIPS,
 358         aes_init_key,
 359         aes_counter,
 360         NULL,
 361         sizeof(EVP_AES_KEY),
 362         NULL,
 363         NULL,
 364         NULL,
 365         NULL
 366         };
 367
 368 const EVP_CIPHER *EVP_aes_256_ctr (void)
 369 {       return &aes_256_ctr_cipher;     }
 370
 371 typedef struct
 372         {
 373         /* AES key schedule to use */
 374         AES_KEY ks;
 375         /* Set if key initialised */
 376         int key_set;
 377         /* Set if an iv is set */
 378         int iv_set;
 379         GCM128_CONTEXT gcm;
 380         /* Temporary IV store */
 381         unsigned char *iv;
 382         /* IV length */
 383         int ivlen;
 384         int taglen;
 385         /* It is OK to generate IVs */
 386         int iv_gen;
 387         } EVP_AES_GCM_CTX;
 388
 389 static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
 390         {
 391         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 392         OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
 393         if (gctx->iv != c->iv)
 394                 OPENSSL_free(gctx->iv);
 395         return 1;
 396         }
 397
 398 /* increment counter (64-bit int) by 1 */
 399 static void ctr64_inc(unsigned char *counter) {
 400         int n=8;
 401         unsigned char  c;
 402
 403         do {
 404                 --n;
 405                 c = counter[n];
 406                 ++c;
 407                 counter[n] = c;
 408                 if (c) return;
 409         } while (n);
 410 }
 411
 412 static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 413         {
 414         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 415         switch (type)
 416                 {
 417         case EVP_CTRL_INIT:
 418                 gctx->key_set = 0;
 419                 gctx->iv_set = 0;
 420                 gctx->ivlen = c->cipher->iv_len;
 421                 gctx->iv = c->iv;
 422                 gctx->taglen = -1;
 423                 gctx->iv_gen = 0;
 424                 return 1;
 425
 426         case EVP_CTRL_GCM_SET_IVLEN:
 427                 if (arg <= 0)
 428                         return 0;
 429 #ifdef OPENSSL_FIPS
 430                 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
 431                                                  && arg < 12)
 432                         return 0;
 433 #endif
 434                 /* Allocate memory for IV if needed */
 435                 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
 436                         {
 437                         if (gctx->iv != c->iv)
 438                                 OPENSSL_free(gctx->iv);
 439                         gctx->iv = OPENSSL_malloc(arg);
 440                         if (!gctx->iv)
 441                                 return 0;
 442                         }
 443                 gctx->ivlen = arg;
 444                 return 1;
 445
 446         case EVP_CTRL_GCM_SET_TAG:
 447                 if (arg <= 0 || arg > 16 || c->encrypt)
 448                         return 0;
 449                 memcpy(c->buf, ptr, arg);
 450                 gctx->taglen = arg;
 451                 return 1;
 452
 453         case EVP_CTRL_GCM_GET_TAG:
 454                 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
 455                         return 0;
 456                 memcpy(ptr, c->buf, arg);
 457                 return 1;
 458
 459         case EVP_CTRL_GCM_SET_IV_FIXED:
 460                 /* Special case: -1 length restores whole IV */
 461                 if (arg == -1)
 462                         {
 463                         memcpy(gctx->iv, ptr, gctx->ivlen);
 464                         gctx->iv_gen = 1;
 465                         return 1;
 466                         }
 467                 /* Fixed field must be at least 4 bytes and invocation field
 468                  * at least 8.
 469                  */
 470                 if ((arg < 4) || (gctx->ivlen - arg) < 8)
 471                         return 0;
 472                 if (arg)
 473                         memcpy(gctx->iv, ptr, arg);
 474                 if (RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
 475                         return 0;
 476                 gctx->iv_gen = 1;
 477                 return 1;
 478
 479         case EVP_CTRL_GCM_IV_GEN:
 480                 if (gctx->iv_gen == 0 || gctx->key_set == 0)
 481                         return 0;
 482                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 483                 memcpy(ptr, gctx->iv, gctx->ivlen);
 484                 /* Invocation field will be at least 8 bytes in size and
 485                  * so no need to check wrap around or increment more than
 486                  * last 8 bytes.
 487                  */
 488                 ctr64_inc(gctx->iv + gctx->ivlen - 8);
 489                 gctx->iv_set = 1;
 490                 return 1;
 491
 492         default:
 493                 return -1;
 494
 495                 }
 496         }
 497
 498 static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 499                         const unsigned char *iv, int enc)
 500         {
 501         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 502         if (!iv && !key)
 503                 return 1;
 504         if (key)
 505                 {
 506                 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
 507                 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
 508                 /* If we have an iv can set it directly, otherwise use
 509                  * saved IV.
 510                  */
 511                 if (iv == NULL && gctx->iv_set)
 512                         iv = gctx->iv;
 513                 if (iv)
 514                         {
 515                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 516                         gctx->iv_set = 1;
 517                         }
 518                 gctx->key_set = 1;
 519                 }
 520         else
 521                 {
 522                 /* If key set use IV, otherwise copy */
 523                 if (gctx->key_set)
 524                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 525                 else
 526                         memcpy(gctx->iv, iv, gctx->ivlen);
 527                 gctx->iv_set = 1;
 528                 gctx->iv_gen = 0;
 529                 }
 530         return 1;
 531         }
 532
 533 static int aes_gcm(EVP_CIPHER_CTX *ctx, unsigned char *out,
 534                 const unsigned char *in, size_t len)
 535         {
 536         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 537         /* If not set up, return error */
 538         if (!gctx->iv_set && !gctx->key_set)
 539                 return -1;
 540         if (!ctx->encrypt && gctx->taglen < 0)
 541                 return -1;
 542         if (in)
 543                 {
 544                 if (out == NULL)
 545                         {
 546                         if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
 547                                 return -1;
 548                         }
 549                 else if (ctx->encrypt)
 550                         {
 551                         if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 552                                 return -1;
 553                         }
 554                 else
 555                         {
 556                         if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 557                                 return -1;
 558                         }
 559                 return len;
 560                 }
 561         else
 562                 {
 563                 if (!ctx->encrypt)
 564                         {
 565                         if (CRYPTO_gcm128_finish(&gctx->gcm,
 566                                         ctx->buf, gctx->taglen) != 0)
 567                                 return -1;
 568                         gctx->iv_set = 0;
 569                         return 0;
 570                         }
 571                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
 572                 gctx->taglen = 16;
 573                 /* Don't reuse the IV */
 574                 gctx->iv_set = 0;
 575                 return 0;
 576                 }
 577
 578         }
 579
 580 static const EVP_CIPHER aes_128_gcm_cipher=
 581         {
 582         NID_aes_128_gcm,1,16,12,
 583         EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 584                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 585                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 586         aes_gcm_init_key,
 587         aes_gcm,
 588         aes_gcm_cleanup,
 589         sizeof(EVP_AES_GCM_CTX),
 590         NULL,
 591         NULL,
 592         aes_gcm_ctrl,
 593         NULL
 594         };
 595
 596 const EVP_CIPHER *EVP_aes_128_gcm (void)
 597 {       return &aes_128_gcm_cipher;     }
 598
 599 static const EVP_CIPHER aes_192_gcm_cipher=
 600         {
 601         NID_aes_192_gcm,1,24,12,
 602         EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 603                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 604                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 605         aes_gcm_init_key,
 606         aes_gcm,
 607         aes_gcm_cleanup,
 608         sizeof(EVP_AES_GCM_CTX),
 609         NULL,
 610         NULL,
 611         aes_gcm_ctrl,
 612         NULL
 613         };
 614
 615 const EVP_CIPHER *EVP_aes_192_gcm (void)
 616 {       return &aes_192_gcm_cipher;     }
 617
 618 static const EVP_CIPHER aes_256_gcm_cipher=
 619         {
 620         NID_aes_256_gcm,1,32,12,
 621         EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 622                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 623                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 624         aes_gcm_init_key,
 625         aes_gcm,
 626         aes_gcm_cleanup,
 627         sizeof(EVP_AES_GCM_CTX),
 628         NULL,
 629         NULL,
 630         aes_gcm_ctrl,
 631         NULL
 632         };
 633
 634 const EVP_CIPHER *EVP_aes_256_gcm (void)
 635 {       return &aes_256_gcm_cipher;     }
 636
 637 typedef struct
 638         {
 639         /* AES key schedules to use */
 640         AES_KEY ks1, ks2;
 641         XTS128_CONTEXT xts;
 642         } EVP_AES_XTS_CTX;
 643
 644 static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 645         {
 646         EVP_AES_XTS_CTX *xctx = c->cipher_data;
 647         if (type != EVP_CTRL_INIT)
 648                 return -1;
 649         /* key1 and key2 are used as an indicator both key and IV are set */
 650         xctx->xts.key1 = NULL;
 651         xctx->xts.key2 = NULL;
 652         return 1;
 653         }
 654
 655 static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 656                         const unsigned char *iv, int enc)
 657         {
 658         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 659         if (!iv && !key)
 660                 return 1;
 661
 662         if (key)
 663                 {
 664                 /* key_len is two AES keys */
 665                 if (enc)
 666                         {
 667                         AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
 668                         xctx->xts.block1 = (block128_f)AES_encrypt;
 669                         }
 670                 else
 671                         {
 672                         AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
 673                         xctx->xts.block1 = (block128_f)AES_decrypt;
 674                         }
 675
 676                 AES_set_encrypt_key(key + ctx->key_len/2,
 677                                                 ctx->key_len * 4, &xctx->ks2);
 678                 xctx->xts.block2 = (block128_f)AES_encrypt;
 679
 680                 xctx->xts.key1 = &xctx->ks1;
 681                 }
 682
 683         if (iv)
 684                 {
 685                 xctx->xts.key2 = &xctx->ks2;
 686                 memcpy(ctx->iv, iv, 16);
 687                 }
 688
 689         return 1;
 690         }
 691
 692 static int aes_xts(EVP_CIPHER_CTX *ctx, unsigned char *out,
 693                 const unsigned char *in, size_t len)
 694         {
 695         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 696         if (!xctx->xts.key1 || !xctx->xts.key2)
 697                 return -1;
 698         if (!out || !in)
 699                 return -1;
 700 #ifdef OPENSSL_FIPS
 701         /* Requirement of SP800-38E */
 702         if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
 703                         (len > (1L<<20)*16))
 704                 {
 705                 EVPerr(EVP_F_AES_XTS, EVP_R_TOO_LARGE);
 706                 return -1;
 707                 }
 708 #endif
 709         if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
 710                                                                 ctx->encrypt))
 711                 return -1;
 712         return len;
 713         }
 714
 715 static const EVP_CIPHER aes_128_xts_cipher=
 716         {
 717         NID_aes_128_xts,16,32,16,
 718         EVP_CIPH_XTS_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 719                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 720                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 721         aes_xts_init_key,
 722         aes_xts,
 723         0,
 724         sizeof(EVP_AES_XTS_CTX),
 725         NULL,
 726         NULL,
 727         aes_xts_ctrl,
 728         NULL
 729         };
 730
 731 const EVP_CIPHER *EVP_aes_128_xts (void)
 732 {       return &aes_128_xts_cipher;     }
 733
 734 static const EVP_CIPHER aes_256_xts_cipher=
 735         {
 736         NID_aes_256_xts,16,64,16,
 737         EVP_CIPH_XTS_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 738                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 739                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 740         aes_xts_init_key,
 741         aes_xts,
 742         0,
 743         sizeof(EVP_AES_XTS_CTX),
 744         NULL,
 745         NULL,
 746         aes_xts_ctrl,
 747         NULL
 748         };
 749
 750 const EVP_CIPHER *EVP_aes_256_xts (void)
 751 {       return &aes_256_xts_cipher;     }
 752
 753 typedef struct
 754         {
 755         /* AES key schedule to use */
 756         AES_KEY ks;
 757         /* Set if key initialised */
 758         int key_set;
 759         /* Set if an iv is set */
 760         int iv_set;
 761         /* Set if tag is valid */
 762         int tag_set;
 763         /* Set if message length set */
 764         int len_set;
 765         /* L and M parameters from RFC3610 */
 766         int L, M;
 767         CCM128_CONTEXT ccm;
 768         } EVP_AES_CCM_CTX;
 769
 770 static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 771         {
 772         EVP_AES_CCM_CTX *cctx = c->cipher_data;
 773         switch (type)
 774                 {
 775         case EVP_CTRL_INIT:
 776                 cctx->key_set = 0;
 777                 cctx->iv_set = 0;
 778                 cctx->L = 8;
 779                 cctx->M = 12;
 780                 cctx->tag_set = 0;
 781                 cctx->len_set = 0;
 782                 return 1;
 783
 784         case EVP_CTRL_CCM_SET_IVLEN:
 785                 arg = 15 - arg;
 786         case EVP_CTRL_CCM_SET_L:
 787                 if (arg < 2 || arg > 8)
 788                         return 0;
 789                 cctx->L = arg;
 790                 return 1;
 791
 792         case EVP_CTRL_CCM_SET_TAG:
 793                 if ((arg & 1) || arg < 4 || arg > 16)
 794                         return 0;
 795                 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
 796                         return 0;
 797                 if (ptr)
 798                         {
 799                         cctx->tag_set = 1;
 800                         memcpy(c->buf, ptr, arg);
 801                         }
 802                 cctx->M = arg;
 803                 return 1;
 804
 805         case EVP_CTRL_CCM_GET_TAG:
 806                 if (!c->encrypt || !cctx->tag_set)
 807                         return 0;
 808                 if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
 809                         return 0;
 810                 cctx->tag_set = 0;
 811                 cctx->iv_set = 0;
 812                 cctx->len_set = 0;
 813                 return 1;
 814
 815         default:
 816                 return -1;
 817
 818                 }
 819         }
 820
 821 static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 822                         const unsigned char *iv, int enc)
 823         {
 824         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 825         if (!iv && !key)
 826                 return 1;
 827         if (key)
 828                 {
 829                 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
 830                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 831                                         &cctx->ks, (block128_f)AES_encrypt);
 832                 cctx->key_set = 1;
 833                 }
 834         if (iv)
 835                 {
 836                 memcpy(ctx->iv, iv, 15 - cctx->L);
 837                 cctx->iv_set = 1;
 838                 }
 839         return 1;
 840         }
 841
 842 static int aes_ccm(EVP_CIPHER_CTX *ctx, unsigned char *out,
 843                 const unsigned char *in, size_t len)
 844         {
 845         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 846         CCM128_CONTEXT *ccm = &cctx->ccm;
 847         /* If not set up, return error */
 848         if (!cctx->iv_set && !cctx->key_set)
 849                 return -1;
 850         if (!ctx->encrypt && !cctx->tag_set)
 851                 return -1;
 852         if (!out)
 853                 {
 854                 if (!in)
 855                         {
 856                         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
 857                                 return -1;
 858                         cctx->len_set = 1;
 859                         return len;
 860                         }
 861                 /* If have AAD need message length */
 862                 if (!cctx->len_set && len)
 863                         return -1;
 864                 CRYPTO_ccm128_aad(ccm, in, len);
 865                 return len;
 866                 }
 867         /* EVP_*Final() doesn't return any data */
 868         if (!in)
 869                 return 0;
 870         /* If not set length yet do it */
 871         if (!cctx->len_set)
 872                 {
 873                 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
 874                         return -1;
 875                 cctx->len_set = 1;
 876                 }
 877         if (ctx->encrypt)
 878                 {
 879                 if (CRYPTO_ccm128_encrypt(ccm, in, out, len))
 880                         return -1;
 881                 cctx->tag_set = 1;
 882                 return len;
 883                 }
 884         else
 885                 {
 886                 int rv = -1;
 887                 if (!CRYPTO_ccm128_decrypt(ccm, in, out, len))
 888                         {
 889                         unsigned char tag[16];
 890                         if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
 891                                 {
 892                                 if (!memcmp(tag, ctx->buf, cctx->M))
 893                                         rv = len;
 894                                 }
 895                         }
 896                 if (rv == -1)
 897                         OPENSSL_cleanse(out, len);
 898                 cctx->iv_set = 0;
 899                 cctx->tag_set = 0;
 900                 cctx->len_set = 0;
 901                 return rv;
 902                 }
 903
 904         }
 905
 906 static const EVP_CIPHER aes_128_ccm_cipher=
 907         {
 908         NID_aes_128_ccm,1,16,12,
 909         EVP_CIPH_CCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 910                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 911                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 912         aes_ccm_init_key,
 913         aes_ccm,
 914         0,
 915         sizeof(EVP_AES_CCM_CTX),
 916         NULL,
 917         NULL,
 918         aes_ccm_ctrl,
 919         NULL
 920         };
 921
 922 const EVP_CIPHER *EVP_aes_128_ccm (void)
 923 {       return &aes_128_ccm_cipher;     }
 924
 925 static const EVP_CIPHER aes_192_ccm_cipher=
 926         {
 927         NID_aes_192_ccm,1,24,12,
 928         EVP_CIPH_CCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 929                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 930                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 931         aes_ccm_init_key,
 932         aes_ccm,
 933         0,
 934         sizeof(EVP_AES_CCM_CTX),
 935         NULL,
 936         NULL,
 937         aes_ccm_ctrl,
 938         NULL
 939         };
 940
 941 const EVP_CIPHER *EVP_aes_192_ccm (void)
 942 {       return &aes_192_ccm_cipher;     }
 943
 944 static const EVP_CIPHER aes_256_ccm_cipher=
 945         {
 946         NID_aes_256_ccm,1,32,12,
 947         EVP_CIPH_CCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 948                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 949                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 950         aes_ccm_init_key,
 951         aes_ccm,
 952         0,
 953         sizeof(EVP_AES_CCM_CTX),
 954         NULL,
 955         NULL,
 956         aes_ccm_ctrl,
 957         NULL
 958         };
 959
 960 const EVP_CIPHER *EVP_aes_256_ccm (void)
 961 {       return &aes_256_ccm_cipher;     }
 962
 963 #endif