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 #define MAXBITCHUNK     ((size_t)1<<(sizeof(size_t)*8-4))
 200
 201 static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
 202         const unsigned char *in,size_t len)
 203 {
 204         block128_f block = OPENSSL_ia32cap_P[1]&AESNI_CAPABLE ?
 205                                 (block128_f)aesni_encrypt  :
 206                                 (block128_f)AES_encrypt;
 207
 208         if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
 209                 CRYPTO_cfb128_1_encrypt(in,out,len,ctx->cipher_data,
 210                         ctx->iv,&ctx->num,ctx->encrypt,block);
 211                 return 1;
 212         }
 213
 214         while (len>=MAXBITCHUNK) {
 215                 CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,ctx->cipher_data,
 216                         ctx->iv,&ctx->num,ctx->encrypt,block);
 217                 len-=MAXBITCHUNK;
 218         }
 219         if (len)
 220                 CRYPTO_cfb128_1_encrypt(in,out,len*8,ctx->cipher_data,
 221                         ctx->iv,&ctx->num,ctx->encrypt,block);
 222
 223         return 1;
 224 }
 225
 226 static int aes_counter(EVP_CIPHER_CTX *ctx, unsigned char *out,
 227                 const unsigned char *in, size_t len)
 228 {
 229         unsigned int num;
 230         num = ctx->num;
 231
 232         if (OPENSSL_ia32cap_P[1]&AESNI_CAPABLE)
 233                 CRYPTO_ctr128_encrypt_ctr32(in,out,len,
 234                         ctx->cipher_data,ctx->iv,ctx->buf,&num,
 235                         (ctr128_f)aesni_ctr32_encrypt_blocks);
 236         else
 237                 CRYPTO_ctr128_encrypt(in,out,len,
 238                         ctx->cipher_data,ctx->iv,ctx->buf,&num,
 239                         (block128_f)AES_encrypt);
 240         ctx->num = (size_t)num;
 241         return 1;
 242 }
 243
 244 #define BLOCK_CIPHER_mydef(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 245 static const EVP_CIPHER aes_##keylen##_##mode = { \
 246         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 247         flags|EVP_CIPH_##MODE##_MODE, \
 248         aes_init_key,aes_##mode##_cipher,NULL,sizeof(EVP_AES_KEY), \
 249         NULL,NULL,NULL,NULL }; \
 250 const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) { return &aes_##keylen##_##mode; }
 251
 252 #define BLOCK_CIPHER_mydefs(nid,keylen,flags)           \
 253         BLOCK_CIPHER_mydef(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)       \
 254         BLOCK_CIPHER_mydef(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)        \
 255         BLOCK_CIPHER_mydef(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
 256         BLOCK_CIPHER_mydef(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
 257         BLOCK_CIPHER_mydef(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \
 258         BLOCK_CIPHER_mydef(nid,keylen,1,16,cfb8,cfb8,CFB,flags)
 259
 260 BLOCK_CIPHER_mydefs(NID_aes,128,EVP_CIPH_FLAG_FIPS)
 261 BLOCK_CIPHER_mydefs(NID_aes,192,EVP_CIPH_FLAG_FIPS)
 262 BLOCK_CIPHER_mydefs(NID_aes,256,EVP_CIPH_FLAG_FIPS)
 263
 264 #else
 265
 266 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 267                    const unsigned char *iv, int enc)
 268         {
 269         int ret;
 270
 271         if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
 272             || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
 273             && !enc)
 274                 ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 275         else
 276                 ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
 277
 278         if(ret < 0)
 279                 {
 280                 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
 281                 return 0;
 282                 }
 283
 284         return 1;
 285         }
 286
 287 #define data(ctx)       EVP_C_DATA(EVP_AES_KEY,ctx)
 288
 289 IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY,
 290                        NID_aes_128, 16, 16, 16, 128,
 291                        EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
 292                        aes_init_key, NULL, NULL, NULL, NULL)
 293 IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY,
 294                        NID_aes_192, 16, 24, 16, 128,
 295                        EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
 296                        aes_init_key, NULL, NULL, NULL, NULL)
 297 IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY,
 298                        NID_aes_256, 16, 32, 16, 128,
 299                        EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
 300                        aes_init_key, NULL, NULL, NULL, NULL)
 301
 302 #define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16,EVP_CIPH_FLAG_FIPS)
 303
 304 IMPLEMENT_AES_CFBR(128,1)
 305 IMPLEMENT_AES_CFBR(192,1)
 306 IMPLEMENT_AES_CFBR(256,1)
 307
 308 IMPLEMENT_AES_CFBR(128,8)
 309 IMPLEMENT_AES_CFBR(192,8)
 310 IMPLEMENT_AES_CFBR(256,8)
 311
 312 static int aes_counter (EVP_CIPHER_CTX *ctx, unsigned char *out,
 313                 const unsigned char *in, size_t len)
 314 {
 315         unsigned int num;
 316         num = ctx->num;
 317 #ifdef AES_CTR_ASM
 318         void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
 319                         size_t blocks, const AES_KEY *key,
 320                         const unsigned char ivec[AES_BLOCK_SIZE]);
 321
 322         CRYPTO_ctr128_encrypt_ctr32(in,out,len,
 323                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 324                 ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
 325 #else
 326         CRYPTO_ctr128_encrypt(in,out,len,
 327                 &((EVP_AES_KEY *)ctx->cipher_data)->ks,
 328                 ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
 329 #endif
 330         ctx->num = (size_t)num;
 331         return 1;
 332 }
 333
 334 #endif
 335
 336 static const EVP_CIPHER aes_128_ctr_cipher=
 337         {
 338         NID_aes_128_ctr,1,16,16,
 339         EVP_CIPH_CTR_MODE|EVP_CIPH_FLAG_FIPS,
 340         aes_init_key,
 341         aes_counter,
 342         NULL,
 343         sizeof(EVP_AES_KEY),
 344         NULL,
 345         NULL,
 346         NULL,
 347         NULL
 348         };
 349
 350 const EVP_CIPHER *EVP_aes_128_ctr (void)
 351 {       return &aes_128_ctr_cipher;     }
 352
 353 static const EVP_CIPHER aes_192_ctr_cipher=
 354         {
 355         NID_aes_192_ctr,1,24,16,
 356         EVP_CIPH_CTR_MODE|EVP_CIPH_FLAG_FIPS,
 357         aes_init_key,
 358         aes_counter,
 359         NULL,
 360         sizeof(EVP_AES_KEY),
 361         NULL,
 362         NULL,
 363         NULL,
 364         NULL
 365         };
 366
 367 const EVP_CIPHER *EVP_aes_192_ctr (void)
 368 {       return &aes_192_ctr_cipher;     }
 369
 370 static const EVP_CIPHER aes_256_ctr_cipher=
 371         {
 372         NID_aes_256_ctr,1,32,16,
 373         EVP_CIPH_CTR_MODE|EVP_CIPH_FLAG_FIPS,
 374         aes_init_key,
 375         aes_counter,
 376         NULL,
 377         sizeof(EVP_AES_KEY),
 378         NULL,
 379         NULL,
 380         NULL,
 381         NULL
 382         };
 383
 384 const EVP_CIPHER *EVP_aes_256_ctr (void)
 385 {       return &aes_256_ctr_cipher;     }
 386
 387 typedef struct
 388         {
 389         /* AES key schedule to use */
 390         AES_KEY ks;
 391         /* Set if key initialised */
 392         int key_set;
 393         /* Set if an iv is set */
 394         int iv_set;
 395         GCM128_CONTEXT gcm;
 396         /* Temporary IV store */
 397         unsigned char *iv;
 398         /* IV length */
 399         int ivlen;
 400         int taglen;
 401         /* It is OK to generate IVs */
 402         int iv_gen;
 403         } EVP_AES_GCM_CTX;
 404
 405 static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
 406         {
 407         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 408         OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
 409         if (gctx->iv != c->iv)
 410                 OPENSSL_free(gctx->iv);
 411         return 1;
 412         }
 413
 414 /* increment counter (64-bit int) by 1 */
 415 static void ctr64_inc(unsigned char *counter) {
 416         int n=8;
 417         unsigned char  c;
 418
 419         do {
 420                 --n;
 421                 c = counter[n];
 422                 ++c;
 423                 counter[n] = c;
 424                 if (c) return;
 425         } while (n);
 426 }
 427
 428 static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 429         {
 430         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 431         switch (type)
 432                 {
 433         case EVP_CTRL_INIT:
 434                 gctx->key_set = 0;
 435                 gctx->iv_set = 0;
 436                 gctx->ivlen = c->cipher->iv_len;
 437                 gctx->iv = c->iv;
 438                 gctx->taglen = -1;
 439                 gctx->iv_gen = 0;
 440                 return 1;
 441
 442         case EVP_CTRL_GCM_SET_IVLEN:
 443                 if (arg <= 0)
 444                         return 0;
 445 #ifdef OPENSSL_FIPS
 446                 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
 447                                                  && arg < 12)
 448                         return 0;
 449 #endif
 450                 /* Allocate memory for IV if needed */
 451                 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
 452                         {
 453                         if (gctx->iv != c->iv)
 454                                 OPENSSL_free(gctx->iv);
 455                         gctx->iv = OPENSSL_malloc(arg);
 456                         if (!gctx->iv)
 457                                 return 0;
 458                         }
 459                 gctx->ivlen = arg;
 460                 return 1;
 461
 462         case EVP_CTRL_GCM_SET_TAG:
 463                 if (arg <= 0 || arg > 16 || c->encrypt)
 464                         return 0;
 465                 memcpy(c->buf, ptr, arg);
 466                 gctx->taglen = arg;
 467                 return 1;
 468
 469         case EVP_CTRL_GCM_GET_TAG:
 470                 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
 471                         return 0;
 472                 memcpy(ptr, c->buf, arg);
 473                 return 1;
 474
 475         case EVP_CTRL_GCM_SET_IV_FIXED:
 476                 /* Special case: -1 length restores whole IV */
 477                 if (arg == -1)
 478                         {
 479                         memcpy(gctx->iv, ptr, gctx->ivlen);
 480                         gctx->iv_gen = 1;
 481                         return 1;
 482                         }
 483                 /* Fixed field must be at least 4 bytes and invocation field
 484                  * at least 8.
 485                  */
 486                 if ((arg < 4) || (gctx->ivlen - arg) < 8)
 487                         return 0;
 488                 if (arg)
 489                         memcpy(gctx->iv, ptr, arg);
 490                 if (RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
 491                         return 0;
 492                 gctx->iv_gen = 1;
 493                 return 1;
 494
 495         case EVP_CTRL_GCM_IV_GEN:
 496                 if (gctx->iv_gen == 0 || gctx->key_set == 0)
 497                         return 0;
 498                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 499                 memcpy(ptr, gctx->iv, gctx->ivlen);
 500                 /* Invocation field will be at least 8 bytes in size and
 501                  * so no need to check wrap around or increment more than
 502                  * last 8 bytes.
 503                  */
 504                 ctr64_inc(gctx->iv + gctx->ivlen - 8);
 505                 gctx->iv_set = 1;
 506                 return 1;
 507
 508         default:
 509                 return -1;
 510
 511                 }
 512         }
 513
 514 static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 515                         const unsigned char *iv, int enc)
 516         {
 517         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 518         if (!iv && !key)
 519                 return 1;
 520         if (key)
 521                 {
 522                 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
 523                 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
 524                 /* If we have an iv can set it directly, otherwise use
 525                  * saved IV.
 526                  */
 527                 if (iv == NULL && gctx->iv_set)
 528                         iv = gctx->iv;
 529                 if (iv)
 530                         {
 531                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 532                         gctx->iv_set = 1;
 533                         }
 534                 gctx->key_set = 1;
 535                 }
 536         else
 537                 {
 538                 /* If key set use IV, otherwise copy */
 539                 if (gctx->key_set)
 540                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 541                 else
 542                         memcpy(gctx->iv, iv, gctx->ivlen);
 543                 gctx->iv_set = 1;
 544                 gctx->iv_gen = 0;
 545                 }
 546         return 1;
 547         }
 548
 549 static int aes_gcm(EVP_CIPHER_CTX *ctx, unsigned char *out,
 550                 const unsigned char *in, size_t len)
 551         {
 552         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 553         /* If not set up, return error */
 554         if (!gctx->iv_set && !gctx->key_set)
 555                 return -1;
 556         if (!ctx->encrypt && gctx->taglen < 0)
 557                 return -1;
 558         if (in)
 559                 {
 560                 if (out == NULL)
 561                         {
 562                         if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
 563                                 return -1;
 564                         }
 565                 else if (ctx->encrypt)
 566                         {
 567                         if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 568                                 return -1;
 569                         }
 570                 else
 571                         {
 572                         if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 573                                 return -1;
 574                         }
 575                 return len;
 576                 }
 577         else
 578                 {
 579                 if (!ctx->encrypt)
 580                         {
 581                         if (CRYPTO_gcm128_finish(&gctx->gcm,
 582                                         ctx->buf, gctx->taglen) != 0)
 583                                 return -1;
 584                         gctx->iv_set = 0;
 585                         return 0;
 586                         }
 587                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
 588                 gctx->taglen = 16;
 589                 /* Don't reuse the IV */
 590                 gctx->iv_set = 0;
 591                 return 0;
 592                 }
 593
 594         }
 595
 596 static const EVP_CIPHER aes_128_gcm_cipher=
 597         {
 598         NID_aes_128_gcm,1,16,12,
 599         EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 600                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 601                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 602         aes_gcm_init_key,
 603         aes_gcm,
 604         aes_gcm_cleanup,
 605         sizeof(EVP_AES_GCM_CTX),
 606         NULL,
 607         NULL,
 608         aes_gcm_ctrl,
 609         NULL
 610         };
 611
 612 const EVP_CIPHER *EVP_aes_128_gcm (void)
 613 {       return &aes_128_gcm_cipher;     }
 614
 615 static const EVP_CIPHER aes_192_gcm_cipher=
 616         {
 617         NID_aes_192_gcm,1,24,12,
 618         EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 619                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 620                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 621         aes_gcm_init_key,
 622         aes_gcm,
 623         aes_gcm_cleanup,
 624         sizeof(EVP_AES_GCM_CTX),
 625         NULL,
 626         NULL,
 627         aes_gcm_ctrl,
 628         NULL
 629         };
 630
 631 const EVP_CIPHER *EVP_aes_192_gcm (void)
 632 {       return &aes_192_gcm_cipher;     }
 633
 634 static const EVP_CIPHER aes_256_gcm_cipher=
 635         {
 636         NID_aes_256_gcm,1,32,12,
 637         EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 638                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 639                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 640         aes_gcm_init_key,
 641         aes_gcm,
 642         aes_gcm_cleanup,
 643         sizeof(EVP_AES_GCM_CTX),
 644         NULL,
 645         NULL,
 646         aes_gcm_ctrl,
 647         NULL
 648         };
 649
 650 const EVP_CIPHER *EVP_aes_256_gcm (void)
 651 {       return &aes_256_gcm_cipher;     }
 652
 653 typedef struct
 654         {
 655         /* AES key schedules to use */
 656         AES_KEY ks1, ks2;
 657         XTS128_CONTEXT xts;
 658         } EVP_AES_XTS_CTX;
 659
 660 static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 661         {
 662         EVP_AES_XTS_CTX *xctx = c->cipher_data;
 663         if (type != EVP_CTRL_INIT)
 664                 return -1;
 665         /* key1 and key2 are used as an indicator both key and IV are set */
 666         xctx->xts.key1 = NULL;
 667         xctx->xts.key2 = NULL;
 668         return 1;
 669         }
 670
 671 static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 672                         const unsigned char *iv, int enc)
 673         {
 674         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 675         if (!iv && !key)
 676                 return 1;
 677
 678         if (key)
 679                 {
 680                 /* key_len is two AES keys */
 681                 if (enc)
 682                         {
 683                         AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
 684                         xctx->xts.block1 = (block128_f)AES_encrypt;
 685                         }
 686                 else
 687                         {
 688                         AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
 689                         xctx->xts.block1 = (block128_f)AES_decrypt;
 690                         }
 691
 692                 AES_set_encrypt_key(key + ctx->key_len/2,
 693                                                 ctx->key_len * 4, &xctx->ks2);
 694                 xctx->xts.block2 = (block128_f)AES_encrypt;
 695
 696                 xctx->xts.key1 = &xctx->ks1;
 697                 }
 698
 699         if (iv)
 700                 {
 701                 xctx->xts.key2 = &xctx->ks2;
 702                 memcpy(ctx->iv, iv, 16);
 703                 }
 704
 705         return 1;
 706         }
 707
 708 static int aes_xts(EVP_CIPHER_CTX *ctx, unsigned char *out,
 709                 const unsigned char *in, size_t len)
 710         {
 711         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 712         if (!xctx->xts.key1 || !xctx->xts.key2)
 713                 return -1;
 714         if (!out || !in)
 715                 return -1;
 716 #ifdef OPENSSL_FIPS
 717         /* Requirement of SP800-38E */
 718         if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
 719                         (len > (1L<<20)*16))
 720                 {
 721                 EVPerr(EVP_F_AES_XTS, EVP_R_TOO_LARGE);
 722                 return -1;
 723                 }
 724 #endif
 725         if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
 726                                                                 ctx->encrypt))
 727                 return -1;
 728         return len;
 729         }
 730
 731 static const EVP_CIPHER aes_128_xts_cipher=
 732         {
 733         NID_aes_128_xts,16,32,16,
 734         EVP_CIPH_XTS_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 735                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 736                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 737         aes_xts_init_key,
 738         aes_xts,
 739         0,
 740         sizeof(EVP_AES_XTS_CTX),
 741         NULL,
 742         NULL,
 743         aes_xts_ctrl,
 744         NULL
 745         };
 746
 747 const EVP_CIPHER *EVP_aes_128_xts (void)
 748 {       return &aes_128_xts_cipher;     }
 749
 750 static const EVP_CIPHER aes_256_xts_cipher=
 751         {
 752         NID_aes_256_xts,16,64,16,
 753         EVP_CIPH_XTS_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 754                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 755                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 756         aes_xts_init_key,
 757         aes_xts,
 758         0,
 759         sizeof(EVP_AES_XTS_CTX),
 760         NULL,
 761         NULL,
 762         aes_xts_ctrl,
 763         NULL
 764         };
 765
 766 const EVP_CIPHER *EVP_aes_256_xts (void)
 767 {       return &aes_256_xts_cipher;     }
 768
 769 typedef struct
 770         {
 771         /* AES key schedule to use */
 772         AES_KEY ks;
 773         /* Set if key initialised */
 774         int key_set;
 775         /* Set if an iv is set */
 776         int iv_set;
 777         /* Set if tag is valid */
 778         int tag_set;
 779         /* Set if message length set */
 780         int len_set;
 781         /* L and M parameters from RFC3610 */
 782         int L, M;
 783         CCM128_CONTEXT ccm;
 784         } EVP_AES_CCM_CTX;
 785
 786 static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 787         {
 788         EVP_AES_CCM_CTX *cctx = c->cipher_data;
 789         switch (type)
 790                 {
 791         case EVP_CTRL_INIT:
 792                 cctx->key_set = 0;
 793                 cctx->iv_set = 0;
 794                 cctx->L = 8;
 795                 cctx->M = 12;
 796                 cctx->tag_set = 0;
 797                 cctx->len_set = 0;
 798                 return 1;
 799
 800         case EVP_CTRL_CCM_SET_IVLEN:
 801                 arg = 15 - arg;
 802         case EVP_CTRL_CCM_SET_L:
 803                 if (arg < 2 || arg > 8)
 804                         return 0;
 805                 cctx->L = arg;
 806                 return 1;
 807
 808         case EVP_CTRL_CCM_SET_TAG:
 809                 if ((arg & 1) || arg < 4 || arg > 16)
 810                         return 0;
 811                 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
 812                         return 0;
 813                 if (ptr)
 814                         {
 815                         cctx->tag_set = 1;
 816                         memcpy(c->buf, ptr, arg);
 817                         }
 818                 cctx->M = arg;
 819                 return 1;
 820
 821         case EVP_CTRL_CCM_GET_TAG:
 822                 if (!c->encrypt || !cctx->tag_set)
 823                         return 0;
 824                 if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
 825                         return 0;
 826                 cctx->tag_set = 0;
 827                 cctx->iv_set = 0;
 828                 cctx->len_set = 0;
 829                 return 1;
 830
 831         default:
 832                 return -1;
 833
 834                 }
 835         }
 836
 837 static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 838                         const unsigned char *iv, int enc)
 839         {
 840         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 841         if (!iv && !key)
 842                 return 1;
 843         if (key)
 844                 {
 845                 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
 846                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 847                                         &cctx->ks, (block128_f)AES_encrypt);
 848                 cctx->key_set = 1;
 849                 }
 850         if (iv)
 851                 {
 852                 memcpy(ctx->iv, iv, 15 - cctx->L);
 853                 cctx->iv_set = 1;
 854                 }
 855         return 1;
 856         }
 857
 858 static int aes_ccm(EVP_CIPHER_CTX *ctx, unsigned char *out,
 859                 const unsigned char *in, size_t len)
 860         {
 861         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 862         CCM128_CONTEXT *ccm = &cctx->ccm;
 863         /* If not set up, return error */
 864         if (!cctx->iv_set && !cctx->key_set)
 865                 return -1;
 866         if (!ctx->encrypt && !cctx->tag_set)
 867                 return -1;
 868         if (!out)
 869                 {
 870                 if (!in)
 871                         {
 872                         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
 873                                 return -1;
 874                         cctx->len_set = 1;
 875                         return len;
 876                         }
 877                 /* If have AAD need message length */
 878                 if (!cctx->len_set && len)
 879                         return -1;
 880                 CRYPTO_ccm128_aad(ccm, in, len);
 881                 return len;
 882                 }
 883         /* EVP_*Final() doesn't return any data */
 884         if (!in)
 885                 return 0;
 886         /* If not set length yet do it */
 887         if (!cctx->len_set)
 888                 {
 889                 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
 890                         return -1;
 891                 cctx->len_set = 1;
 892                 }
 893         if (ctx->encrypt)
 894                 {
 895                 if (CRYPTO_ccm128_encrypt(ccm, in, out, len))
 896                         return -1;
 897                 cctx->tag_set = 1;
 898                 return len;
 899                 }
 900         else
 901                 {
 902                 int rv = -1;
 903                 if (!CRYPTO_ccm128_decrypt(ccm, in, out, len))
 904                         {
 905                         unsigned char tag[16];
 906                         if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
 907                                 {
 908                                 if (!memcmp(tag, ctx->buf, cctx->M))
 909                                         rv = len;
 910                                 }
 911                         }
 912                 if (rv == -1)
 913                         OPENSSL_cleanse(out, len);
 914                 cctx->iv_set = 0;
 915                 cctx->tag_set = 0;
 916                 cctx->len_set = 0;
 917                 return rv;
 918                 }
 919
 920         }
 921
 922 static const EVP_CIPHER aes_128_ccm_cipher=
 923         {
 924         NID_aes_128_ccm,1,16,12,
 925         EVP_CIPH_CCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 926                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 927                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 928         aes_ccm_init_key,
 929         aes_ccm,
 930         0,
 931         sizeof(EVP_AES_CCM_CTX),
 932         NULL,
 933         NULL,
 934         aes_ccm_ctrl,
 935         NULL
 936         };
 937
 938 const EVP_CIPHER *EVP_aes_128_ccm (void)
 939 {       return &aes_128_ccm_cipher;     }
 940
 941 static const EVP_CIPHER aes_192_ccm_cipher=
 942         {
 943         NID_aes_192_ccm,1,24,12,
 944         EVP_CIPH_CCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 945                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 946                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 947         aes_ccm_init_key,
 948         aes_ccm,
 949         0,
 950         sizeof(EVP_AES_CCM_CTX),
 951         NULL,
 952         NULL,
 953         aes_ccm_ctrl,
 954         NULL
 955         };
 956
 957 const EVP_CIPHER *EVP_aes_192_ccm (void)
 958 {       return &aes_192_ccm_cipher;     }
 959
 960 static const EVP_CIPHER aes_256_ccm_cipher=
 961         {
 962         NID_aes_256_ccm,1,32,12,
 963         EVP_CIPH_CCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
 964                 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 965                 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
 966         aes_ccm_init_key,
 967         aes_ccm,
 968         0,
 969         sizeof(EVP_AES_CCM_CTX),
 970         NULL,
 971         NULL,
 972         aes_ccm_ctrl,
 973         NULL
 974         };
 975
 976 const EVP_CIPHER *EVP_aes_256_ccm (void)
 977 {       return &aes_256_ccm_cipher;     }
 978
 979 #endif