crypto/libressl/crypto/evp/e_aes.c

   1 /* $OpenBSD: e_aes.c,v 1.35 2019/03/17 18:07:41 tb Exp $ */
   2 /* ====================================================================
   3  * Copyright (c) 2001-2011 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this
  18  *    software must display the following acknowledgment:
  19  *    "This product includes software developed by the OpenSSL Project
  20  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  21  *
  22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For written permission, please contact
  25  *    openssl-core@openssl.org.
  26  *
  27  * 5. Products derived from this software may not be called "OpenSSL"
  28  *    nor may "OpenSSL" appear in their names without prior written
  29  *    permission of the OpenSSL Project.
  30  *
  31  * 6. Redistributions of any form whatsoever must retain the following
  32  *    acknowledgment:
  33  *    "This product includes software developed by the OpenSSL Project
  34  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47  * OF THE POSSIBILITY OF SUCH DAMAGE.
  48  * ====================================================================
  49  *
  50  */
  51
  52 #include <limits.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55
  56 #include <openssl/opensslconf.h>
  57
  58 #ifndef OPENSSL_NO_AES
  59 #include <openssl/aes.h>
  60 #include <openssl/err.h>
  61 #include <openssl/evp.h>
  62
  63 #include "evp_locl.h"
  64 #include "modes_lcl.h"
  65
  66 typedef struct {
  67         AES_KEY ks;
  68         block128_f block;
  69         union {
  70                 cbc128_f cbc;
  71                 ctr128_f ctr;
  72         } stream;
  73 } EVP_AES_KEY;
  74
  75 typedef struct {
  76         AES_KEY ks;             /* AES key schedule to use */
  77         int key_set;            /* Set if key initialised */
  78         int iv_set;             /* Set if an iv is set */
  79         GCM128_CONTEXT gcm;
  80         unsigned char *iv;      /* Temporary IV store */
  81         int ivlen;              /* IV length */
  82         int taglen;
  83         int iv_gen;             /* It is OK to generate IVs */
  84         int tls_aad_len;        /* TLS AAD length */
  85         ctr128_f ctr;
  86 } EVP_AES_GCM_CTX;
  87
  88 typedef struct {
  89         AES_KEY ks1, ks2;       /* AES key schedules to use */
  90         XTS128_CONTEXT xts;
  91         void (*stream)(const unsigned char *in, unsigned char *out,
  92             size_t length, const AES_KEY *key1, const AES_KEY *key2,
  93             const unsigned char iv[16]);
  94 } EVP_AES_XTS_CTX;
  95
  96 typedef struct {
  97         AES_KEY ks;             /* AES key schedule to use */
  98         int key_set;            /* Set if key initialised */
  99         int iv_set;             /* Set if an iv is set */
 100         int tag_set;            /* Set if tag is valid */
 101         int len_set;            /* Set if message length set */
 102         int L, M;               /* L and M parameters from RFC3610 */
 103         CCM128_CONTEXT ccm;
 104         ccm128_f str;
 105 } EVP_AES_CCM_CTX;
 106
 107 #define MAXBITCHUNK     ((size_t)1<<(sizeof(size_t)*8-4))
 108
 109 #ifdef VPAES_ASM
 110 int vpaes_set_encrypt_key(const unsigned char *userKey, int bits,
 111     AES_KEY *key);
 112 int vpaes_set_decrypt_key(const unsigned char *userKey, int bits,
 113     AES_KEY *key);
 114
 115 void vpaes_encrypt(const unsigned char *in, unsigned char *out,
 116     const AES_KEY *key);
 117 void vpaes_decrypt(const unsigned char *in, unsigned char *out,
 118     const AES_KEY *key);
 119
 120 void vpaes_cbc_encrypt(const unsigned char *in, unsigned char *out,
 121     size_t length, const AES_KEY *key, unsigned char *ivec, int enc);
 122 #endif
 123 #ifdef BSAES_ASM
 124 void bsaes_cbc_encrypt(const unsigned char *in, unsigned char *out,
 125     size_t length, const AES_KEY *key, unsigned char ivec[16], int enc);
 126 void bsaes_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out,
 127     size_t len, const AES_KEY *key, const unsigned char ivec[16]);
 128 void bsaes_xts_encrypt(const unsigned char *inp, unsigned char *out,
 129     size_t len, const AES_KEY *key1, const AES_KEY *key2,
 130     const unsigned char iv[16]);
 131 void bsaes_xts_decrypt(const unsigned char *inp, unsigned char *out,
 132     size_t len, const AES_KEY *key1, const AES_KEY *key2,
 133     const unsigned char iv[16]);
 134 #endif
 135 #ifdef AES_CTR_ASM
 136 void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
 137     size_t blocks, const AES_KEY *key,
 138     const unsigned char ivec[AES_BLOCK_SIZE]);
 139 #endif
 140 #ifdef AES_XTS_ASM
 141 void AES_xts_encrypt(const char *inp, char *out, size_t len,
 142     const AES_KEY *key1, const AES_KEY *key2, const unsigned char iv[16]);
 143 void AES_xts_decrypt(const char *inp, char *out, size_t len,
 144     const AES_KEY *key1, const AES_KEY *key2, const unsigned char iv[16]);
 145 #endif
 146
 147 #if     defined(AES_ASM) &&                             (  \
 148         ((defined(__i386)       || defined(__i386__)    || \
 149           defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \
 150         defined(__x86_64)       || defined(__x86_64__)  || \
 151         defined(_M_AMD64)       || defined(_M_X64)      || \
 152         defined(__INTEL__)                              )
 153
 154 #include "x86_arch.h"
 155
 156 #ifdef VPAES_ASM
 157 #define VPAES_CAPABLE   (OPENSSL_cpu_caps() & CPUCAP_MASK_SSSE3)
 158 #endif
 159 #ifdef BSAES_ASM
 160 #define BSAES_CAPABLE   VPAES_CAPABLE
 161 #endif
 162 /*
 163  * AES-NI section
 164  */
 165 #define AESNI_CAPABLE   (OPENSSL_cpu_caps() & CPUCAP_MASK_AESNI)
 166
 167 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
 168     AES_KEY *key);
 169 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
 170     AES_KEY *key);
 171
 172 void aesni_encrypt(const unsigned char *in, unsigned char *out,
 173     const AES_KEY *key);
 174 void aesni_decrypt(const unsigned char *in, unsigned char *out,
 175     const AES_KEY *key);
 176
 177 void aesni_ecb_encrypt(const unsigned char *in, unsigned char *out,
 178     size_t length, const AES_KEY *key, int enc);
 179 void aesni_cbc_encrypt(const unsigned char *in, unsigned char *out,
 180     size_t length, const AES_KEY *key, unsigned char *ivec, int enc);
 181
 182 void aesni_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out,
 183     size_t blocks, const void *key, const unsigned char *ivec);
 184
 185 void aesni_xts_encrypt(const unsigned char *in, unsigned char *out,
 186     size_t length, const AES_KEY *key1, const AES_KEY *key2,
 187     const unsigned char iv[16]);
 188
 189 void aesni_xts_decrypt(const unsigned char *in, unsigned char *out,
 190     size_t length, const AES_KEY *key1, const AES_KEY *key2,
 191     const unsigned char iv[16]);
 192
 193 void aesni_ccm64_encrypt_blocks (const unsigned char *in, unsigned char *out,
 194     size_t blocks, const void *key, const unsigned char ivec[16],
 195     unsigned char cmac[16]);
 196
 197 void aesni_ccm64_decrypt_blocks (const unsigned char *in, unsigned char *out,
 198     size_t blocks, const void *key, const unsigned char ivec[16],
 199     unsigned char cmac[16]);
 200
 201 static int
 202 aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 203     const unsigned char *iv, int enc)
 204 {
 205         int ret, mode;
 206         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 207
 208         mode = ctx->cipher->flags & EVP_CIPH_MODE;
 209         if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) &&
 210             !enc) {
 211                 ret = aesni_set_decrypt_key(key, ctx->key_len * 8,
 212                     ctx->cipher_data);
 213                 dat->block = (block128_f)aesni_decrypt;
 214                 dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 215                     (cbc128_f)aesni_cbc_encrypt : NULL;
 216         } else {
 217                 ret = aesni_set_encrypt_key(key, ctx->key_len * 8,
 218                     ctx->cipher_data);
 219                 dat->block = (block128_f)aesni_encrypt;
 220                 if (mode == EVP_CIPH_CBC_MODE)
 221                         dat->stream.cbc = (cbc128_f)aesni_cbc_encrypt;
 222                 else if (mode == EVP_CIPH_CTR_MODE)
 223                         dat->stream.ctr = (ctr128_f)aesni_ctr32_encrypt_blocks;
 224                 else
 225                         dat->stream.cbc = NULL;
 226         }
 227
 228         if (ret < 0) {
 229                 EVPerror(EVP_R_AES_KEY_SETUP_FAILED);
 230                 return 0;
 231         }
 232
 233         return 1;
 234 }
 235
 236 static int
 237 aesni_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 238     const unsigned char *in, size_t len)
 239 {
 240         aesni_cbc_encrypt(in, out, len, ctx->cipher_data, ctx->iv,
 241             ctx->encrypt);
 242
 243         return 1;
 244 }
 245
 246 static int
 247 aesni_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 248     const unsigned char *in, size_t len)
 249 {
 250         size_t  bl = ctx->cipher->block_size;
 251
 252         if (len < bl)
 253                 return 1;
 254
 255         aesni_ecb_encrypt(in, out, len, ctx->cipher_data, ctx->encrypt);
 256
 257         return 1;
 258 }
 259
 260 #define aesni_ofb_cipher aes_ofb_cipher
 261 static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 262     const unsigned char *in, size_t len);
 263
 264 #define aesni_cfb_cipher aes_cfb_cipher
 265 static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 266     const unsigned char *in, size_t len);
 267
 268 #define aesni_cfb8_cipher aes_cfb8_cipher
 269 static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 270     const unsigned char *in, size_t len);
 271
 272 #define aesni_cfb1_cipher aes_cfb1_cipher
 273 static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 274     const unsigned char *in, size_t len);
 275
 276 #define aesni_ctr_cipher aes_ctr_cipher
 277 static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 278     const unsigned char *in, size_t len);
 279
 280 static int
 281 aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 282     const unsigned char *iv, int enc)
 283 {
 284         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 285
 286         if (!iv && !key)
 287                 return 1;
 288         if (key) {
 289                 aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
 290                 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
 291                     (block128_f)aesni_encrypt);
 292                 gctx->ctr = (ctr128_f)aesni_ctr32_encrypt_blocks;
 293                 /* If we have an iv can set it directly, otherwise use
 294                  * saved IV.
 295                  */
 296                 if (iv == NULL && gctx->iv_set)
 297                         iv = gctx->iv;
 298                 if (iv) {
 299                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 300                         gctx->iv_set = 1;
 301                 }
 302                 gctx->key_set = 1;
 303         } else {
 304                 /* If key set use IV, otherwise copy */
 305                 if (gctx->key_set)
 306                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 307                 else
 308                         memcpy(gctx->iv, iv, gctx->ivlen);
 309                 gctx->iv_set = 1;
 310                 gctx->iv_gen = 0;
 311         }
 312         return 1;
 313 }
 314
 315 #define aesni_gcm_cipher aes_gcm_cipher
 316 static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 317     const unsigned char *in, size_t len);
 318
 319 static int
 320 aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 321     const unsigned char *iv, int enc)
 322 {
 323         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 324
 325         if (!iv && !key)
 326                 return 1;
 327
 328         if (key) {
 329                 /* key_len is two AES keys */
 330                 if (enc) {
 331                         aesni_set_encrypt_key(key, ctx->key_len * 4,
 332                             &xctx->ks1);
 333                         xctx->xts.block1 = (block128_f)aesni_encrypt;
 334                         xctx->stream = aesni_xts_encrypt;
 335                 } else {
 336                         aesni_set_decrypt_key(key, ctx->key_len * 4,
 337                             &xctx->ks1);
 338                         xctx->xts.block1 = (block128_f)aesni_decrypt;
 339                         xctx->stream = aesni_xts_decrypt;
 340                 }
 341
 342                 aesni_set_encrypt_key(key + ctx->key_len / 2,
 343                     ctx->key_len * 4, &xctx->ks2);
 344                 xctx->xts.block2 = (block128_f)aesni_encrypt;
 345
 346                 xctx->xts.key1 = &xctx->ks1;
 347         }
 348
 349         if (iv) {
 350                 xctx->xts.key2 = &xctx->ks2;
 351                 memcpy(ctx->iv, iv, 16);
 352         }
 353
 354         return 1;
 355 }
 356
 357 #define aesni_xts_cipher aes_xts_cipher
 358 static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 359     const unsigned char *in, size_t len);
 360
 361 static int
 362 aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 363     const unsigned char *iv, int enc)
 364 {
 365         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 366
 367         if (!iv && !key)
 368                 return 1;
 369         if (key) {
 370                 aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
 371                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 372                     &cctx->ks, (block128_f)aesni_encrypt);
 373                 cctx->str = enc ? (ccm128_f)aesni_ccm64_encrypt_blocks :
 374                     (ccm128_f)aesni_ccm64_decrypt_blocks;
 375                 cctx->key_set = 1;
 376         }
 377         if (iv) {
 378                 memcpy(ctx->iv, iv, 15 - cctx->L);
 379                 cctx->iv_set = 1;
 380         }
 381         return 1;
 382 }
 383
 384 #define aesni_ccm_cipher aes_ccm_cipher
 385 static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 386     const unsigned char *in, size_t len);
 387
 388 #define BLOCK_CIPHER_generic(n,keylen,blocksize,ivlen,nmode,mode,MODE,fl) \
 389 static const EVP_CIPHER aesni_##keylen##_##mode = {                     \
 390         .nid = n##_##keylen##_##nmode,                                  \
 391         .block_size = blocksize,                                        \
 392         .key_len = keylen / 8,                                          \
 393         .iv_len = ivlen,                                                \
 394         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 395         .init = aesni_init_key,                                         \
 396         .do_cipher = aesni_##mode##_cipher,                             \
 397         .ctx_size = sizeof(EVP_AES_KEY)                                 \
 398 };                                                                      \
 399 static const EVP_CIPHER aes_##keylen##_##mode = {                       \
 400         .nid = n##_##keylen##_##nmode,                                  \
 401         .block_size = blocksize,                                        \
 402         .key_len = keylen / 8,                                          \
 403         .iv_len = ivlen,                                                \
 404         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 405         .init = aes_init_key,                                           \
 406         .do_cipher = aes_##mode##_cipher,                               \
 407         .ctx_size = sizeof(EVP_AES_KEY)                                 \
 408 };                                                                      \
 409 const EVP_CIPHER *                                                      \
 410 EVP_aes_##keylen##_##mode(void)                                         \
 411 {                                                                       \
 412         return AESNI_CAPABLE ?                                          \
 413             &aesni_##keylen##_##mode : &aes_##keylen##_##mode;          \
 414 }
 415
 416 #define BLOCK_CIPHER_custom(n,keylen,blocksize,ivlen,mode,MODE,fl)      \
 417 static const EVP_CIPHER aesni_##keylen##_##mode = {                     \
 418         .nid = n##_##keylen##_##mode,                                   \
 419         .block_size = blocksize,                                        \
 420         .key_len =                                                      \
 421             (EVP_CIPH_##MODE##_MODE == EVP_CIPH_XTS_MODE ? 2 : 1) *     \
 422             keylen / 8,                                                 \
 423         .iv_len = ivlen,                                                \
 424         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 425         .init = aesni_##mode##_init_key,                                \
 426         .do_cipher = aesni_##mode##_cipher,                             \
 427         .cleanup = aes_##mode##_cleanup,                                \
 428         .ctx_size = sizeof(EVP_AES_##MODE##_CTX),                       \
 429         .ctrl = aes_##mode##_ctrl                                       \
 430 };                                                                      \
 431 static const EVP_CIPHER aes_##keylen##_##mode = {                       \
 432         .nid = n##_##keylen##_##mode,                                   \
 433         .block_size = blocksize,                                        \
 434         .key_len =                                                      \
 435             (EVP_CIPH_##MODE##_MODE == EVP_CIPH_XTS_MODE ? 2 : 1) *     \
 436             keylen / 8,                                                 \
 437         .iv_len = ivlen,                                                \
 438         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 439         .init = aes_##mode##_init_key,                                  \
 440         .do_cipher = aes_##mode##_cipher,                               \
 441         .cleanup = aes_##mode##_cleanup,                                \
 442         .ctx_size = sizeof(EVP_AES_##MODE##_CTX),                       \
 443         .ctrl = aes_##mode##_ctrl                                       \
 444 };                                                                      \
 445 const EVP_CIPHER *                                                      \
 446 EVP_aes_##keylen##_##mode(void)                                         \
 447 {                                                                       \
 448         return AESNI_CAPABLE ?                                          \
 449             &aesni_##keylen##_##mode : &aes_##keylen##_##mode;          \
 450 }
 451
 452 #else
 453
 454 #define BLOCK_CIPHER_generic(n,keylen,blocksize,ivlen,nmode,mode,MODE,fl) \
 455 static const EVP_CIPHER aes_##keylen##_##mode = {                       \
 456         .nid = n##_##keylen##_##nmode,                                  \
 457         .block_size = blocksize,                                        \
 458         .key_len = keylen / 8,                                          \
 459         .iv_len = ivlen,                                                \
 460         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 461         .init = aes_init_key,                                           \
 462         .do_cipher = aes_##mode##_cipher,                               \
 463         .ctx_size = sizeof(EVP_AES_KEY)                                 \
 464 };                                                                      \
 465 const EVP_CIPHER *                                                      \
 466 EVP_aes_##keylen##_##mode(void)                                         \
 467 {                                                                       \
 468         return &aes_##keylen##_##mode;                                  \
 469 }
 470
 471 #define BLOCK_CIPHER_custom(n,keylen,blocksize,ivlen,mode,MODE,fl)      \
 472 static const EVP_CIPHER aes_##keylen##_##mode = {                       \
 473         .nid = n##_##keylen##_##mode,                                   \
 474         .block_size = blocksize,                                        \
 475         .key_len =                                                      \
 476             (EVP_CIPH_##MODE##_MODE == EVP_CIPH_XTS_MODE ? 2 : 1) *     \
 477             keylen / 8,                                                 \
 478         .iv_len = ivlen,                                                \
 479         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 480         .init = aes_##mode##_init_key,                                  \
 481         .do_cipher = aes_##mode##_cipher,                               \
 482         .cleanup = aes_##mode##_cleanup,                                \
 483         .ctx_size = sizeof(EVP_AES_##MODE##_CTX),                       \
 484         .ctrl = aes_##mode##_ctrl                                       \
 485 };                                                                      \
 486 const EVP_CIPHER *                                                      \
 487 EVP_aes_##keylen##_##mode(void)                                         \
 488 {                                                                       \
 489         return &aes_##keylen##_##mode;                                  \
 490 }
 491
 492 #endif
 493
 494 #define BLOCK_CIPHER_generic_pack(nid,keylen,flags)             \
 495         BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
 496         BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)      \
 497         BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 498         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 499         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags)       \
 500         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags)       \
 501         BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
 502
 503 static int
 504 aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 505     const unsigned char *iv, int enc)
 506 {
 507         int ret, mode;
 508         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 509
 510         mode = ctx->cipher->flags & EVP_CIPH_MODE;
 511         if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) &&
 512             !enc)
 513 #ifdef BSAES_CAPABLE
 514                 if (BSAES_CAPABLE && mode == EVP_CIPH_CBC_MODE) {
 515                         ret = AES_set_decrypt_key(key, ctx->key_len * 8,
 516                             &dat->ks);
 517                         dat->block = (block128_f)AES_decrypt;
 518                         dat->stream.cbc = (cbc128_f)bsaes_cbc_encrypt;
 519                 } else
 520 #endif
 521 #ifdef VPAES_CAPABLE
 522                 if (VPAES_CAPABLE) {
 523                         ret = vpaes_set_decrypt_key(key, ctx->key_len * 8,
 524                             &dat->ks);
 525                         dat->block = (block128_f)vpaes_decrypt;
 526                         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 527                             (cbc128_f)vpaes_cbc_encrypt : NULL;
 528                 } else
 529 #endif
 530                 {
 531                         ret = AES_set_decrypt_key(key, ctx->key_len * 8,
 532                             &dat->ks);
 533                         dat->block = (block128_f)AES_decrypt;
 534                         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 535                             (cbc128_f)AES_cbc_encrypt : NULL;
 536                 } else
 537 #ifdef BSAES_CAPABLE
 538                 if (BSAES_CAPABLE && mode == EVP_CIPH_CTR_MODE) {
 539                         ret = AES_set_encrypt_key(key, ctx->key_len * 8,
 540                             &dat->ks);
 541                         dat->block = (block128_f)AES_encrypt;
 542                         dat->stream.ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks;
 543                 } else
 544 #endif
 545 #ifdef VPAES_CAPABLE
 546                 if (VPAES_CAPABLE) {
 547                         ret = vpaes_set_encrypt_key(key, ctx->key_len * 8,
 548                             &dat->ks);
 549                         dat->block = (block128_f)vpaes_encrypt;
 550                         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 551                             (cbc128_f)vpaes_cbc_encrypt : NULL;
 552                 } else
 553 #endif
 554                 {
 555                         ret = AES_set_encrypt_key(key, ctx->key_len * 8,
 556                             &dat->ks);
 557                         dat->block = (block128_f)AES_encrypt;
 558                         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 559                             (cbc128_f)AES_cbc_encrypt : NULL;
 560 #ifdef AES_CTR_ASM
 561                         if (mode == EVP_CIPH_CTR_MODE)
 562                                 dat->stream.ctr = (ctr128_f)AES_ctr32_encrypt;
 563 #endif
 564                 }
 565
 566         if (ret < 0) {
 567                 EVPerror(EVP_R_AES_KEY_SETUP_FAILED);
 568                 return 0;
 569         }
 570
 571         return 1;
 572 }
 573
 574 static int
 575 aes_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 576     const unsigned char *in, size_t len)
 577 {
 578         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 579
 580         if (dat->stream.cbc)
 581                 (*dat->stream.cbc)(in, out, len, &dat->ks, ctx->iv,
 582                     ctx->encrypt);
 583         else if (ctx->encrypt)
 584                 CRYPTO_cbc128_encrypt(in, out, len, &dat->ks, ctx->iv,
 585                     dat->block);
 586         else
 587                 CRYPTO_cbc128_decrypt(in, out, len, &dat->ks, ctx->iv,
 588                     dat->block);
 589
 590         return 1;
 591 }
 592
 593 static int
 594 aes_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 595     const unsigned char *in, size_t len)
 596 {
 597         size_t  bl = ctx->cipher->block_size;
 598         size_t  i;
 599         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 600
 601         if (len < bl)
 602                 return 1;
 603
 604         for (i = 0, len -= bl; i <= len; i += bl)
 605                 (*dat->block)(in + i, out + i, &dat->ks);
 606
 607         return 1;
 608 }
 609
 610 static int
 611 aes_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 612     const unsigned char *in, size_t len)
 613 {
 614         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 615
 616         CRYPTO_ofb128_encrypt(in, out, len, &dat->ks, ctx->iv, &ctx->num,
 617             dat->block);
 618         return 1;
 619 }
 620
 621 static int
 622 aes_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 623     const unsigned char *in, size_t len)
 624 {
 625         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 626
 627         CRYPTO_cfb128_encrypt(in, out, len, &dat->ks, ctx->iv, &ctx->num,
 628             ctx->encrypt, dat->block);
 629         return 1;
 630 }
 631
 632 static int
 633 aes_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 634     const unsigned char *in, size_t len)
 635 {
 636         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 637
 638         CRYPTO_cfb128_8_encrypt(in, out, len, &dat->ks, ctx->iv, &ctx->num,
 639             ctx->encrypt, dat->block);
 640         return 1;
 641 }
 642
 643 static int
 644 aes_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 645     const unsigned char *in, size_t len)
 646 {
 647         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 648
 649         if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
 650                 CRYPTO_cfb128_1_encrypt(in, out, len, &dat->ks, ctx->iv,
 651                     &ctx->num, ctx->encrypt, dat->block);
 652                 return 1;
 653         }
 654
 655         while (len >= MAXBITCHUNK) {
 656                 CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK*8, &dat->ks,
 657                     ctx->iv, &ctx->num, ctx->encrypt, dat->block);
 658                 len -= MAXBITCHUNK;
 659         }
 660         if (len)
 661                 CRYPTO_cfb128_1_encrypt(in, out, len*8, &dat->ks,
 662                     ctx->iv, &ctx->num, ctx->encrypt, dat->block);
 663
 664         return 1;
 665 }
 666
 667 static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
 668     const unsigned char *in, size_t len)
 669 {
 670         unsigned int num = ctx->num;
 671         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 672
 673         if (dat->stream.ctr)
 674                 CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks,
 675                     ctx->iv, ctx->buf, &num, dat->stream.ctr);
 676         else
 677                 CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,
 678                     ctx->iv, ctx->buf, &num, dat->block);
 679         ctx->num = (size_t)num;
 680         return 1;
 681 }
 682
 683 BLOCK_CIPHER_generic_pack(NID_aes, 128, EVP_CIPH_FLAG_FIPS)
 684 BLOCK_CIPHER_generic_pack(NID_aes, 192, EVP_CIPH_FLAG_FIPS)
 685 BLOCK_CIPHER_generic_pack(NID_aes, 256, EVP_CIPH_FLAG_FIPS)
 686
 687 static int
 688 aes_gcm_cleanup(EVP_CIPHER_CTX *c)
 689 {
 690         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 691
 692         if (gctx->iv != c->iv)
 693                 free(gctx->iv);
 694         explicit_bzero(gctx, sizeof(*gctx));
 695         return 1;
 696 }
 697
 698 /* increment counter (64-bit int) by 1 */
 699 static void
 700 ctr64_inc(unsigned char *counter)
 701 {
 702         int n = 8;
 703         unsigned char  c;
 704
 705         do {
 706                 --n;
 707                 c = counter[n];
 708                 ++c;
 709                 counter[n] = c;
 710                 if (c)
 711                         return;
 712         } while (n);
 713 }
 714
 715 static int
 716 aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 717 {
 718         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 719
 720         switch (type) {
 721         case EVP_CTRL_INIT:
 722                 gctx->key_set = 0;
 723                 gctx->iv_set = 0;
 724                 gctx->ivlen = c->cipher->iv_len;
 725                 gctx->iv = c->iv;
 726                 gctx->taglen = -1;
 727                 gctx->iv_gen = 0;
 728                 gctx->tls_aad_len = -1;
 729                 return 1;
 730
 731         case EVP_CTRL_GCM_SET_IVLEN:
 732                 if (arg <= 0)
 733                         return 0;
 734                 /* Allocate memory for IV if needed */
 735                 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) {
 736                         if (gctx->iv != c->iv)
 737                                 free(gctx->iv);
 738                         gctx->iv = malloc(arg);
 739                         if (!gctx->iv)
 740                                 return 0;
 741                 }
 742                 gctx->ivlen = arg;
 743                 return 1;
 744
 745         case EVP_CTRL_GCM_SET_TAG:
 746                 if (arg <= 0 || arg > 16 || c->encrypt)
 747                         return 0;
 748                 memcpy(c->buf, ptr, arg);
 749                 gctx->taglen = arg;
 750                 return 1;
 751
 752         case EVP_CTRL_GCM_GET_TAG:
 753                 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
 754                         return 0;
 755                 memcpy(ptr, c->buf, arg);
 756                 return 1;
 757
 758         case EVP_CTRL_GCM_SET_IV_FIXED:
 759                 /* Special case: -1 length restores whole IV */
 760                 if (arg == -1) {
 761                         memcpy(gctx->iv, ptr, gctx->ivlen);
 762                         gctx->iv_gen = 1;
 763                         return 1;
 764                 }
 765                 /* Fixed field must be at least 4 bytes and invocation field
 766                  * at least 8.
 767                  */
 768                 if ((arg < 4) || (gctx->ivlen - arg) < 8)
 769                         return 0;
 770                 if (arg)
 771                         memcpy(gctx->iv, ptr, arg);
 772                 if (c->encrypt)
 773                         arc4random_buf(gctx->iv + arg, gctx->ivlen - arg);
 774                 gctx->iv_gen = 1;
 775                 return 1;
 776
 777         case EVP_CTRL_GCM_IV_GEN:
 778                 if (gctx->iv_gen == 0 || gctx->key_set == 0)
 779                         return 0;
 780                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 781                 if (arg <= 0 || arg > gctx->ivlen)
 782                         arg = gctx->ivlen;
 783                 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
 784                 /* Invocation field will be at least 8 bytes in size and
 785                  * so no need to check wrap around or increment more than
 786                  * last 8 bytes.
 787                  */
 788                 ctr64_inc(gctx->iv + gctx->ivlen - 8);
 789                 gctx->iv_set = 1;
 790                 return 1;
 791
 792         case EVP_CTRL_GCM_SET_IV_INV:
 793                 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
 794                         return 0;
 795                 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
 796                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 797                 gctx->iv_set = 1;
 798                 return 1;
 799
 800         case EVP_CTRL_AEAD_TLS1_AAD:
 801                 /* Save the AAD for later use */
 802                 if (arg != 13)
 803                         return 0;
 804                 memcpy(c->buf, ptr, arg);
 805                 gctx->tls_aad_len = arg;
 806                 {
 807                         unsigned int len = c->buf[arg - 2] << 8 |
 808                             c->buf[arg - 1];
 809
 810                         /* Correct length for explicit IV */
 811                         if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN)
 812                                 return 0;
 813                         len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
 814
 815                         /* If decrypting correct for tag too */
 816                         if (!c->encrypt) {
 817                                 if (len < EVP_GCM_TLS_TAG_LEN)
 818                                         return 0;
 819                                 len -= EVP_GCM_TLS_TAG_LEN;
 820                         }
 821                         c->buf[arg - 2] = len >> 8;
 822                         c->buf[arg - 1] = len & 0xff;
 823                 }
 824                 /* Extra padding: tag appended to record */
 825                 return EVP_GCM_TLS_TAG_LEN;
 826
 827         case EVP_CTRL_COPY:
 828             {
 829                 EVP_CIPHER_CTX *out = ptr;
 830                 EVP_AES_GCM_CTX *gctx_out = out->cipher_data;
 831
 832                 if (gctx->gcm.key) {
 833                         if (gctx->gcm.key != &gctx->ks)
 834                                 return 0;
 835                         gctx_out->gcm.key = &gctx_out->ks;
 836                 }
 837                 if (gctx->iv == c->iv)
 838                         gctx_out->iv = out->iv;
 839                 else {
 840                         gctx_out->iv = malloc(gctx->ivlen);
 841                         if (!gctx_out->iv)
 842                                 return 0;
 843                         memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
 844                 }
 845                 return 1;
 846             }
 847
 848         default:
 849                 return -1;
 850
 851         }
 852 }
 853
 854 static ctr128_f
 855 aes_gcm_set_key(AES_KEY *aes_key, GCM128_CONTEXT *gcm_ctx,
 856     const unsigned char *key, size_t key_len)
 857 {
 858 #ifdef BSAES_CAPABLE
 859         if (BSAES_CAPABLE) {
 860                 AES_set_encrypt_key(key, key_len * 8, aes_key);
 861                 CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f)AES_encrypt);
 862                 return (ctr128_f)bsaes_ctr32_encrypt_blocks;
 863         } else
 864 #endif
 865 #ifdef VPAES_CAPABLE
 866         if (VPAES_CAPABLE) {
 867                 vpaes_set_encrypt_key(key, key_len * 8, aes_key);
 868                 CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f)vpaes_encrypt);
 869                 return NULL;
 870         } else
 871 #endif
 872                 (void)0; /* terminate potentially open 'else' */
 873
 874         AES_set_encrypt_key(key, key_len * 8, aes_key);
 875         CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f)AES_encrypt);
 876 #ifdef AES_CTR_ASM
 877         return (ctr128_f)AES_ctr32_encrypt;
 878 #else
 879         return NULL;
 880 #endif
 881 }
 882
 883 static int
 884 aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 885     const unsigned char *iv, int enc)
 886 {
 887         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 888
 889         if (!iv && !key)
 890                 return 1;
 891         if (key) {
 892                 gctx->ctr = aes_gcm_set_key(&gctx->ks, &gctx->gcm,
 893                     key, ctx->key_len);
 894
 895                 /* If we have an iv can set it directly, otherwise use
 896                  * saved IV.
 897                  */
 898                 if (iv == NULL && gctx->iv_set)
 899                         iv = gctx->iv;
 900                 if (iv) {
 901                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 902                         gctx->iv_set = 1;
 903                 }
 904                 gctx->key_set = 1;
 905         } else {
 906                 /* If key set use IV, otherwise copy */
 907                 if (gctx->key_set)
 908                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 909                 else
 910                         memcpy(gctx->iv, iv, gctx->ivlen);
 911                 gctx->iv_set = 1;
 912                 gctx->iv_gen = 0;
 913         }
 914         return 1;
 915 }
 916
 917 /* Handle TLS GCM packet format. This consists of the last portion of the IV
 918  * followed by the payload and finally the tag. On encrypt generate IV,
 919  * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
 920  * and verify tag.
 921  */
 922
 923 static int
 924 aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 925     const unsigned char *in, size_t len)
 926 {
 927         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 928         int rv = -1;
 929
 930         /* Encrypt/decrypt must be performed in place */
 931         if (out != in ||
 932             len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))
 933                 return -1;
 934
 935         /* Set IV from start of buffer or generate IV and write to start
 936          * of buffer.
 937          */
 938         if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
 939             EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
 940             EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
 941                 goto err;
 942
 943         /* Use saved AAD */
 944         if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
 945                 goto err;
 946
 947         /* Fix buffer and length to point to payload */
 948         in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 949         out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 950         len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 951         if (ctx->encrypt) {
 952                 /* Encrypt payload */
 953                 if (gctx->ctr) {
 954                         if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, in, out,
 955                             len, gctx->ctr))
 956                                 goto err;
 957                 } else {
 958                         if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 959                                 goto err;
 960                 }
 961                 out += len;
 962
 963                 /* Finally write tag */
 964                 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
 965                 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 966         } else {
 967                 /* Decrypt */
 968                 if (gctx->ctr) {
 969                         if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, in, out,
 970                             len, gctx->ctr))
 971                                 goto err;
 972                 } else {
 973                         if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 974                                 goto err;
 975                 }
 976                 /* Retrieve tag */
 977                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, EVP_GCM_TLS_TAG_LEN);
 978
 979                 /* If tag mismatch wipe buffer */
 980                 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) {
 981                         explicit_bzero(out, len);
 982                         goto err;
 983                 }
 984                 rv = len;
 985         }
 986
 987 err:
 988         gctx->iv_set = 0;
 989         gctx->tls_aad_len = -1;
 990         return rv;
 991 }
 992
 993 static int
 994 aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 995     const unsigned char *in, size_t len)
 996 {
 997         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 998
 999         /* If not set up, return error */
1000         if (!gctx->key_set)
1001                 return -1;
1002
1003         if (gctx->tls_aad_len >= 0)
1004                 return aes_gcm_tls_cipher(ctx, out, in, len);
1005
1006         if (!gctx->iv_set)
1007                 return -1;
1008
1009         if (in) {
1010                 if (out == NULL) {
1011                         if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
1012                                 return -1;
1013                 } else if (ctx->encrypt) {
1014                         if (gctx->ctr) {
1015                                 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
1016                                     in, out, len, gctx->ctr))
1017                                         return -1;
1018                         } else {
1019                                 if (CRYPTO_gcm128_encrypt(&gctx->gcm,
1020                                     in, out, len))
1021                                         return -1;
1022                         }
1023                 } else {
1024                         if (gctx->ctr) {
1025                                 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
1026                                     in, out, len, gctx->ctr))
1027                                         return -1;
1028                         } else {
1029                                 if (CRYPTO_gcm128_decrypt(&gctx->gcm,
1030                                     in, out, len))
1031                                         return -1;
1032                         }
1033                 }
1034                 return len;
1035         } else {
1036                 if (!ctx->encrypt) {
1037                         if (gctx->taglen < 0)
1038                                 return -1;
1039                         if (CRYPTO_gcm128_finish(&gctx->gcm, ctx->buf,
1040                             gctx->taglen) != 0)
1041                                 return -1;
1042                         gctx->iv_set = 0;
1043                         return 0;
1044                 }
1045                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
1046                 gctx->taglen = 16;
1047
1048                 /* Don't reuse the IV */
1049                 gctx->iv_set = 0;
1050                 return 0;
1051         }
1052
1053 }
1054
1055 #define CUSTOM_FLAGS \
1056     ( EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV | \
1057       EVP_CIPH_FLAG_CUSTOM_CIPHER | EVP_CIPH_ALWAYS_CALL_INIT | \
1058       EVP_CIPH_CTRL_INIT | EVP_CIPH_CUSTOM_COPY )
1059
1060 BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, gcm, GCM,
1061     EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1062 BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, gcm, GCM,
1063     EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1064 BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, gcm, GCM,
1065     EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1066
1067 static int
1068 aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1069 {
1070         EVP_AES_XTS_CTX *xctx = c->cipher_data;
1071
1072         switch (type) {
1073         case EVP_CTRL_INIT:
1074                 /*
1075                  * key1 and key2 are used as an indicator both key and IV
1076                  * are set
1077                  */
1078                 xctx->xts.key1 = NULL;
1079                 xctx->xts.key2 = NULL;
1080                 return 1;
1081
1082         case EVP_CTRL_COPY:
1083             {
1084                 EVP_CIPHER_CTX *out = ptr;
1085                 EVP_AES_XTS_CTX *xctx_out = out->cipher_data;
1086
1087                 if (xctx->xts.key1) {
1088                         if (xctx->xts.key1 != &xctx->ks1)
1089                                 return 0;
1090                         xctx_out->xts.key1 = &xctx_out->ks1;
1091                 }
1092                 if (xctx->xts.key2) {
1093                         if (xctx->xts.key2 != &xctx->ks2)
1094                                 return 0;
1095                         xctx_out->xts.key2 = &xctx_out->ks2;
1096                 }
1097                 return 1;
1098             }
1099         }
1100         return -1;
1101 }
1102
1103 static int
1104 aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1105     const unsigned char *iv, int enc)
1106 {
1107         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1108
1109         if (!iv && !key)
1110                 return 1;
1111
1112         if (key) do {
1113 #ifdef AES_XTS_ASM
1114                 xctx->stream = enc ? AES_xts_encrypt : AES_xts_decrypt;
1115 #else
1116                 xctx->stream = NULL;
1117 #endif
1118                 /* key_len is two AES keys */
1119 #ifdef BSAES_CAPABLE
1120                 if (BSAES_CAPABLE)
1121                         xctx->stream = enc ? bsaes_xts_encrypt :
1122                             bsaes_xts_decrypt;
1123                 else
1124 #endif
1125 #ifdef VPAES_CAPABLE
1126                 if (VPAES_CAPABLE) {
1127                         if (enc) {
1128                                 vpaes_set_encrypt_key(key, ctx->key_len * 4,
1129                                     &xctx->ks1);
1130                                 xctx->xts.block1 = (block128_f)vpaes_encrypt;
1131                         } else {
1132                                 vpaes_set_decrypt_key(key, ctx->key_len * 4,
1133                                     &xctx->ks1);
1134                                 xctx->xts.block1 = (block128_f)vpaes_decrypt;
1135                         }
1136
1137                         vpaes_set_encrypt_key(key + ctx->key_len / 2,
1138                             ctx->key_len * 4, &xctx->ks2);
1139                         xctx->xts.block2 = (block128_f)vpaes_encrypt;
1140
1141                         xctx->xts.key1 = &xctx->ks1;
1142                         break;
1143                 } else
1144 #endif
1145                         (void)0;        /* terminate potentially open 'else' */
1146
1147                 if (enc) {
1148                         AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1149                         xctx->xts.block1 = (block128_f)AES_encrypt;
1150                 } else {
1151                         AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1152                         xctx->xts.block1 = (block128_f)AES_decrypt;
1153                 }
1154
1155                 AES_set_encrypt_key(key + ctx->key_len / 2,
1156                     ctx->key_len * 4, &xctx->ks2);
1157                 xctx->xts.block2 = (block128_f)AES_encrypt;
1158
1159                 xctx->xts.key1 = &xctx->ks1;
1160         } while (0);
1161
1162         if (iv) {
1163                 xctx->xts.key2 = &xctx->ks2;
1164                 memcpy(ctx->iv, iv, 16);
1165         }
1166
1167         return 1;
1168 }
1169
1170 static int
1171 aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1172     const unsigned char *in, size_t len)
1173 {
1174         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1175
1176         if (!xctx->xts.key1 || !xctx->xts.key2)
1177                 return 0;
1178         if (!out || !in || len < AES_BLOCK_SIZE)
1179                 return 0;
1180
1181         if (xctx->stream)
1182                 (*xctx->stream)(in, out, len, xctx->xts.key1, xctx->xts.key2,
1183                     ctx->iv);
1184         else if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
1185             ctx->encrypt))
1186                 return 0;
1187         return 1;
1188 }
1189
1190 #define aes_xts_cleanup NULL
1191
1192 #define XTS_FLAGS \
1193     ( EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV | \
1194       EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT | EVP_CIPH_CUSTOM_COPY )
1195
1196 BLOCK_CIPHER_custom(NID_aes, 128, 1, 16, xts, XTS, EVP_CIPH_FLAG_FIPS|XTS_FLAGS)
1197 BLOCK_CIPHER_custom(NID_aes, 256, 1, 16, xts, XTS, EVP_CIPH_FLAG_FIPS|XTS_FLAGS)
1198
1199 static int
1200 aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1201 {
1202         EVP_AES_CCM_CTX *cctx = c->cipher_data;
1203
1204         switch (type) {
1205         case EVP_CTRL_INIT:
1206                 cctx->key_set = 0;
1207                 cctx->iv_set = 0;
1208                 cctx->L = 8;
1209                 cctx->M = 12;
1210                 cctx->tag_set = 0;
1211                 cctx->len_set = 0;
1212                 return 1;
1213
1214         case EVP_CTRL_CCM_SET_IVLEN:
1215                 arg = 15 - arg;
1216
1217         case EVP_CTRL_CCM_SET_L:
1218                 if (arg < 2 || arg > 8)
1219                         return 0;
1220                 cctx->L = arg;
1221                 return 1;
1222
1223         case EVP_CTRL_CCM_SET_TAG:
1224                 if ((arg & 1) || arg < 4 || arg > 16)
1225                         return 0;
1226                 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
1227                         return 0;
1228                 if (ptr) {
1229                         cctx->tag_set = 1;
1230                         memcpy(c->buf, ptr, arg);
1231                 }
1232                 cctx->M = arg;
1233                 return 1;
1234
1235         case EVP_CTRL_CCM_GET_TAG:
1236                 if (!c->encrypt || !cctx->tag_set)
1237                         return 0;
1238                 if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
1239                         return 0;
1240                 cctx->tag_set = 0;
1241                 cctx->iv_set = 0;
1242                 cctx->len_set = 0;
1243                 return 1;
1244
1245         case EVP_CTRL_COPY:
1246             {
1247                 EVP_CIPHER_CTX *out = ptr;
1248                 EVP_AES_CCM_CTX *cctx_out = out->cipher_data;
1249
1250                 if (cctx->ccm.key) {
1251                         if (cctx->ccm.key != &cctx->ks)
1252                                 return 0;
1253                         cctx_out->ccm.key = &cctx_out->ks;
1254                 }
1255                 return 1;
1256             }
1257
1258         default:
1259                 return -1;
1260         }
1261 }
1262
1263 static int
1264 aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1265     const unsigned char *iv, int enc)
1266 {
1267         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1268
1269         if (!iv && !key)
1270                 return 1;
1271         if (key) do {
1272 #ifdef VPAES_CAPABLE
1273                 if (VPAES_CAPABLE) {
1274                         vpaes_set_encrypt_key(key, ctx->key_len*8, &cctx->ks);
1275                         CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1276                             &cctx->ks, (block128_f)vpaes_encrypt);
1277                         cctx->str = NULL;
1278                         cctx->key_set = 1;
1279                         break;
1280                 }
1281 #endif
1282                 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
1283                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1284                     &cctx->ks, (block128_f)AES_encrypt);
1285                 cctx->str = NULL;
1286                 cctx->key_set = 1;
1287         } while (0);
1288         if (iv) {
1289                 memcpy(ctx->iv, iv, 15 - cctx->L);
1290                 cctx->iv_set = 1;
1291         }
1292         return 1;
1293 }
1294
1295 static int
1296 aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1297     const unsigned char *in, size_t len)
1298 {
1299         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1300         CCM128_CONTEXT *ccm = &cctx->ccm;
1301
1302         /* If not set up, return error */
1303         if (!cctx->iv_set && !cctx->key_set)
1304                 return -1;
1305         if (!ctx->encrypt && !cctx->tag_set)
1306                 return -1;
1307
1308         if (!out) {
1309                 if (!in) {
1310                         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,
1311                             len))
1312                                 return -1;
1313                         cctx->len_set = 1;
1314                         return len;
1315                 }
1316                 /* If have AAD need message length */
1317                 if (!cctx->len_set && len)
1318                         return -1;
1319                 CRYPTO_ccm128_aad(ccm, in, len);
1320                 return len;
1321         }
1322         /* EVP_*Final() doesn't return any data */
1323         if (!in)
1324                 return 0;
1325         /* If not set length yet do it */
1326         if (!cctx->len_set) {
1327                 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
1328                         return -1;
1329                 cctx->len_set = 1;
1330         }
1331         if (ctx->encrypt) {
1332                 if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
1333                     cctx->str) : CRYPTO_ccm128_encrypt(ccm, in, out, len))
1334                         return -1;
1335                 cctx->tag_set = 1;
1336                 return len;
1337         } else {
1338                 int rv = -1;
1339                 if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
1340                     cctx->str) : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
1341                         unsigned char tag[16];
1342                         if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
1343                                 if (!memcmp(tag, ctx->buf, cctx->M))
1344                                         rv = len;
1345                         }
1346                 }
1347                 if (rv == -1)
1348                         explicit_bzero(out, len);
1349                 cctx->iv_set = 0;
1350                 cctx->tag_set = 0;
1351                 cctx->len_set = 0;
1352                 return rv;
1353         }
1354
1355 }
1356
1357 #define aes_ccm_cleanup NULL
1358
1359 BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, ccm, CCM,
1360     EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1361 BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, ccm, CCM,
1362     EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1363 BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, ccm, CCM,
1364     EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1365
1366 #define EVP_AEAD_AES_GCM_TAG_LEN 16
1367
1368 struct aead_aes_gcm_ctx {
1369         union {
1370                 double align;
1371                 AES_KEY ks;
1372         } ks;
1373         GCM128_CONTEXT gcm;
1374         ctr128_f ctr;
1375         unsigned char tag_len;
1376 };
1377
1378 static int
1379 aead_aes_gcm_init(EVP_AEAD_CTX *ctx, const unsigned char *key, size_t key_len,
1380     size_t tag_len)
1381 {
1382         struct aead_aes_gcm_ctx *gcm_ctx;
1383         const size_t key_bits = key_len * 8;
1384
1385         /* EVP_AEAD_CTX_init should catch this. */
1386         if (key_bits != 128 && key_bits != 256) {
1387                 EVPerror(EVP_R_BAD_KEY_LENGTH);
1388                 return 0;
1389         }
1390
1391         if (tag_len == EVP_AEAD_DEFAULT_TAG_LENGTH)
1392                 tag_len = EVP_AEAD_AES_GCM_TAG_LEN;
1393
1394         if (tag_len > EVP_AEAD_AES_GCM_TAG_LEN) {
1395                 EVPerror(EVP_R_TAG_TOO_LARGE);
1396                 return 0;
1397         }
1398
1399         gcm_ctx = malloc(sizeof(struct aead_aes_gcm_ctx));
1400         if (gcm_ctx == NULL)
1401                 return 0;
1402
1403 #ifdef AESNI_CAPABLE
1404         if (AESNI_CAPABLE) {
1405                 aesni_set_encrypt_key(key, key_bits, &gcm_ctx->ks.ks);
1406                 CRYPTO_gcm128_init(&gcm_ctx->gcm, &gcm_ctx->ks.ks,
1407                     (block128_f)aesni_encrypt);
1408                 gcm_ctx->ctr = (ctr128_f) aesni_ctr32_encrypt_blocks;
1409         } else
1410 #endif
1411         {
1412                 gcm_ctx->ctr = aes_gcm_set_key(&gcm_ctx->ks.ks, &gcm_ctx->gcm,
1413                     key, key_len);
1414         }
1415         gcm_ctx->tag_len = tag_len;
1416         ctx->aead_state = gcm_ctx;
1417
1418         return 1;
1419 }
1420
1421 static void
1422 aead_aes_gcm_cleanup(EVP_AEAD_CTX *ctx)
1423 {
1424         struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
1425
1426         freezero(gcm_ctx, sizeof(*gcm_ctx));
1427 }
1428
1429 static int
1430 aead_aes_gcm_seal(const EVP_AEAD_CTX *ctx, unsigned char *out, size_t *out_len,
1431     size_t max_out_len, const unsigned char *nonce, size_t nonce_len,
1432     const unsigned char *in, size_t in_len, const unsigned char *ad,
1433     size_t ad_len)
1434 {
1435         const struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
1436         GCM128_CONTEXT gcm;
1437         size_t bulk = 0;
1438
1439         if (max_out_len < in_len + gcm_ctx->tag_len) {
1440                 EVPerror(EVP_R_BUFFER_TOO_SMALL);
1441                 return 0;
1442         }
1443
1444         memcpy(&gcm, &gcm_ctx->gcm, sizeof(gcm));
1445         CRYPTO_gcm128_setiv(&gcm, nonce, nonce_len);
1446
1447         if (ad_len > 0 && CRYPTO_gcm128_aad(&gcm, ad, ad_len))
1448                 return 0;
1449
1450         if (gcm_ctx->ctr) {
1451                 if (CRYPTO_gcm128_encrypt_ctr32(&gcm, in + bulk, out + bulk,
1452                     in_len - bulk, gcm_ctx->ctr))
1453                         return 0;
1454         } else {
1455                 if (CRYPTO_gcm128_encrypt(&gcm, in + bulk, out + bulk,
1456                     in_len - bulk))
1457                         return 0;
1458         }
1459
1460         CRYPTO_gcm128_tag(&gcm, out + in_len, gcm_ctx->tag_len);
1461         *out_len = in_len + gcm_ctx->tag_len;
1462
1463         return 1;
1464 }
1465
1466 static int
1467 aead_aes_gcm_open(const EVP_AEAD_CTX *ctx, unsigned char *out, size_t *out_len,
1468     size_t max_out_len, const unsigned char *nonce, size_t nonce_len,
1469     const unsigned char *in, size_t in_len, const unsigned char *ad,
1470     size_t ad_len)
1471 {
1472         const struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
1473         unsigned char tag[EVP_AEAD_AES_GCM_TAG_LEN];
1474         GCM128_CONTEXT gcm;
1475         size_t plaintext_len;
1476         size_t bulk = 0;
1477
1478         if (in_len < gcm_ctx->tag_len) {
1479                 EVPerror(EVP_R_BAD_DECRYPT);
1480                 return 0;
1481         }
1482
1483         plaintext_len = in_len - gcm_ctx->tag_len;
1484
1485         if (max_out_len < plaintext_len) {
1486                 EVPerror(EVP_R_BUFFER_TOO_SMALL);
1487                 return 0;
1488         }
1489
1490         memcpy(&gcm, &gcm_ctx->gcm, sizeof(gcm));
1491         CRYPTO_gcm128_setiv(&gcm, nonce, nonce_len);
1492
1493         if (CRYPTO_gcm128_aad(&gcm, ad, ad_len))
1494                 return 0;
1495
1496         if (gcm_ctx->ctr) {
1497                 if (CRYPTO_gcm128_decrypt_ctr32(&gcm, in + bulk, out + bulk,
1498                     in_len - bulk - gcm_ctx->tag_len, gcm_ctx->ctr))
1499                         return 0;
1500         } else {
1501                 if (CRYPTO_gcm128_decrypt(&gcm, in + bulk, out + bulk,
1502                     in_len - bulk - gcm_ctx->tag_len))
1503                         return 0;
1504         }
1505
1506         CRYPTO_gcm128_tag(&gcm, tag, gcm_ctx->tag_len);
1507         if (timingsafe_memcmp(tag, in + plaintext_len, gcm_ctx->tag_len) != 0) {
1508                 EVPerror(EVP_R_BAD_DECRYPT);
1509                 return 0;
1510         }
1511
1512         *out_len = plaintext_len;
1513
1514         return 1;
1515 }
1516
1517 static const EVP_AEAD aead_aes_128_gcm = {
1518         .key_len = 16,
1519         .nonce_len = 12,
1520         .overhead = EVP_AEAD_AES_GCM_TAG_LEN,
1521         .max_tag_len = EVP_AEAD_AES_GCM_TAG_LEN,
1522
1523         .init = aead_aes_gcm_init,
1524         .cleanup = aead_aes_gcm_cleanup,
1525         .seal = aead_aes_gcm_seal,
1526         .open = aead_aes_gcm_open,
1527 };
1528
1529 static const EVP_AEAD aead_aes_256_gcm = {
1530         .key_len = 32,
1531         .nonce_len = 12,
1532         .overhead = EVP_AEAD_AES_GCM_TAG_LEN,
1533         .max_tag_len = EVP_AEAD_AES_GCM_TAG_LEN,
1534
1535         .init = aead_aes_gcm_init,
1536         .cleanup = aead_aes_gcm_cleanup,
1537         .seal = aead_aes_gcm_seal,
1538         .open = aead_aes_gcm_open,
1539 };
1540
1541 const EVP_AEAD *
1542 EVP_aead_aes_128_gcm(void)
1543 {
1544         return &aead_aes_128_gcm;
1545 }
1546
1547 const EVP_AEAD *
1548 EVP_aead_aes_256_gcm(void)
1549 {
1550         return &aead_aes_256_gcm;
1551 }
1552
1553 typedef struct {
1554         union {
1555                 double align;
1556                 AES_KEY ks;
1557         } ks;
1558         unsigned char *iv;
1559 } EVP_AES_WRAP_CTX;
1560
1561 static int
1562 aes_wrap_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1563     const unsigned char *iv, int enc)
1564 {
1565         EVP_AES_WRAP_CTX *wctx = (EVP_AES_WRAP_CTX *)ctx->cipher_data;
1566
1567         if (iv == NULL && key == NULL)
1568                 return 1;
1569
1570         if (key != NULL) {
1571                 if (ctx->encrypt)
1572                         AES_set_encrypt_key(key, 8 * ctx->key_len,
1573                             &wctx->ks.ks);
1574                 else
1575                         AES_set_decrypt_key(key, 8 * ctx->key_len,
1576                             &wctx->ks.ks);
1577
1578                 if (iv == NULL)
1579                         wctx->iv = NULL;
1580         }
1581
1582         if (iv != NULL) {
1583                 memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
1584                 wctx->iv = ctx->iv;
1585         }
1586
1587         return 1;
1588 }
1589
1590 static int
1591 aes_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1592     const unsigned char *in, size_t inlen)
1593 {
1594         EVP_AES_WRAP_CTX *wctx = ctx->cipher_data;
1595         int ret;
1596
1597         if (in == NULL)
1598                 return 0;
1599
1600         if (inlen % 8 != 0)
1601                 return -1;
1602         if (ctx->encrypt && inlen < 8)
1603                 return -1;
1604         if (!ctx->encrypt && inlen < 16)
1605                 return -1;
1606         if (inlen > INT_MAX)
1607                 return -1;
1608
1609         if (out == NULL) {
1610                 if (ctx->encrypt)
1611                         return inlen + 8;
1612                 else
1613                         return inlen - 8;
1614         }
1615
1616         if (ctx->encrypt)
1617                 ret = AES_wrap_key(&wctx->ks.ks, wctx->iv, out, in,
1618                     (unsigned int)inlen);
1619         else
1620                 ret = AES_unwrap_key(&wctx->ks.ks, wctx->iv, out, in,
1621                     (unsigned int)inlen);
1622
1623         return ret != 0 ? ret : -1;
1624 }
1625
1626 #define WRAP_FLAGS \
1627     ( EVP_CIPH_WRAP_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER | \
1628       EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_FLAG_DEFAULT_ASN1 )
1629
1630 static const EVP_CIPHER aes_128_wrap = {
1631         .nid = NID_id_aes128_wrap,
1632         .block_size = 8,
1633         .key_len = 16,
1634         .iv_len = 8,
1635         .flags = WRAP_FLAGS,
1636         .init = aes_wrap_init_key,
1637         .do_cipher = aes_wrap_cipher,
1638         .cleanup = NULL,
1639         .ctx_size = sizeof(EVP_AES_WRAP_CTX),
1640         .set_asn1_parameters = NULL,
1641         .get_asn1_parameters = NULL,
1642         .ctrl = NULL,
1643         .app_data = NULL,
1644 };
1645
1646 const EVP_CIPHER *
1647 EVP_aes_128_wrap(void)
1648 {
1649         return &aes_128_wrap;
1650 }
1651
1652 static const EVP_CIPHER aes_192_wrap = {
1653         .nid = NID_id_aes192_wrap,
1654         .block_size = 8,
1655         .key_len = 24,
1656         .iv_len = 8,
1657         .flags = WRAP_FLAGS,
1658         .init = aes_wrap_init_key,
1659         .do_cipher = aes_wrap_cipher,
1660         .cleanup = NULL,
1661         .ctx_size = sizeof(EVP_AES_WRAP_CTX),
1662         .set_asn1_parameters = NULL,
1663         .get_asn1_parameters = NULL,
1664         .ctrl = NULL,
1665         .app_data = NULL,
1666 };
1667
1668 const EVP_CIPHER *
1669 EVP_aes_192_wrap(void)
1670 {
1671         return &aes_192_wrap;
1672 }
1673
1674 static const EVP_CIPHER aes_256_wrap = {
1675         .nid = NID_id_aes256_wrap,
1676         .block_size = 8,
1677         .key_len = 32,
1678         .iv_len = 8,
1679         .flags = WRAP_FLAGS,
1680         .init = aes_wrap_init_key,
1681         .do_cipher = aes_wrap_cipher,
1682         .cleanup = NULL,
1683         .ctx_size = sizeof(EVP_AES_WRAP_CTX),
1684         .set_asn1_parameters = NULL,
1685         .get_asn1_parameters = NULL,
1686         .ctrl = NULL,
1687         .app_data = NULL,
1688 };
1689
1690 const EVP_CIPHER *
1691 EVP_aes_256_wrap(void)
1692 {
1693         return &aes_256_wrap;
1694 }
1695
1696 #endif