crypto/libressl/crypto/evp/e_aes.c

   1 /* $OpenBSD: e_aes.c,v 1.28 2015/06/20 12:01:14 jsing 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 <stdlib.h>
  53 #include <string.h>
  54
  55 #include <openssl/opensslconf.h>
  56
  57 #ifndef OPENSSL_NO_AES
  58 #include <openssl/aes.h>
  59 #include <openssl/err.h>
  60 #include <openssl/evp.h>
  61
  62 #include "evp_locl.h"
  63 #include "modes_lcl.h"
  64
  65 typedef struct {
  66         AES_KEY ks;
  67         block128_f block;
  68         union {
  69                 cbc128_f cbc;
  70                 ctr128_f ctr;
  71         } stream;
  72 } EVP_AES_KEY;
  73
  74 typedef struct {
  75         AES_KEY ks;             /* AES key schedule to use */
  76         int key_set;            /* Set if key initialised */
  77         int iv_set;             /* Set if an iv is set */
  78         GCM128_CONTEXT gcm;
  79         unsigned char *iv;      /* Temporary IV store */
  80         int ivlen;              /* IV length */
  81         int taglen;
  82         int iv_gen;             /* It is OK to generate IVs */
  83         int tls_aad_len;        /* TLS AAD length */
  84         ctr128_f ctr;
  85 } EVP_AES_GCM_CTX;
  86
  87 typedef struct {
  88         AES_KEY ks1, ks2;       /* AES key schedules to use */
  89         XTS128_CONTEXT xts;
  90         void (*stream)(const unsigned char *in, unsigned char *out,
  91             size_t length, const AES_KEY *key1, const AES_KEY *key2,
  92             const unsigned char iv[16]);
  93 } EVP_AES_XTS_CTX;
  94
  95 typedef struct {
  96         AES_KEY ks;             /* AES key schedule to use */
  97         int key_set;            /* Set if key initialised */
  98         int iv_set;             /* Set if an iv is set */
  99         int tag_set;            /* Set if tag is valid */
 100         int len_set;            /* Set if message length set */
 101         int L, M;               /* L and M parameters from RFC3610 */
 102         CCM128_CONTEXT ccm;
 103         ccm128_f str;
 104 } EVP_AES_CCM_CTX;
 105
 106 #define MAXBITCHUNK     ((size_t)1<<(sizeof(size_t)*8-4))
 107
 108 #ifdef VPAES_ASM
 109 int vpaes_set_encrypt_key(const unsigned char *userKey, int bits,
 110     AES_KEY *key);
 111 int vpaes_set_decrypt_key(const unsigned char *userKey, int bits,
 112     AES_KEY *key);
 113
 114 void vpaes_encrypt(const unsigned char *in, unsigned char *out,
 115     const AES_KEY *key);
 116 void vpaes_decrypt(const unsigned char *in, unsigned char *out,
 117     const AES_KEY *key);
 118
 119 void vpaes_cbc_encrypt(const unsigned char *in, unsigned char *out,
 120     size_t length, const AES_KEY *key, unsigned char *ivec, int enc);
 121 #endif
 122 #ifdef BSAES_ASM
 123 void bsaes_cbc_encrypt(const unsigned char *in, unsigned char *out,
 124     size_t length, const AES_KEY *key, unsigned char ivec[16], int enc);
 125 void bsaes_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out,
 126     size_t len, const AES_KEY *key, const unsigned char ivec[16]);
 127 void bsaes_xts_encrypt(const unsigned char *inp, unsigned char *out,
 128     size_t len, const AES_KEY *key1, const AES_KEY *key2,
 129     const unsigned char iv[16]);
 130 void bsaes_xts_decrypt(const unsigned char *inp, unsigned char *out,
 131     size_t len, const AES_KEY *key1, const AES_KEY *key2,
 132     const unsigned char iv[16]);
 133 #endif
 134 #ifdef AES_CTR_ASM
 135 void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
 136     size_t blocks, const AES_KEY *key,
 137     const unsigned char ivec[AES_BLOCK_SIZE]);
 138 #endif
 139 #ifdef AES_XTS_ASM
 140 void AES_xts_encrypt(const char *inp, char *out, size_t len,
 141     const AES_KEY *key1, const AES_KEY *key2, const unsigned char iv[16]);
 142 void AES_xts_decrypt(const char *inp, char *out, size_t len,
 143     const AES_KEY *key1, const AES_KEY *key2, const unsigned char iv[16]);
 144 #endif
 145
 146 #if     defined(AES_ASM) && !defined(I386_ONLY) &&      (  \
 147         ((defined(__i386)       || defined(__i386__)    || \
 148           defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \
 149         defined(__x86_64)       || defined(__x86_64__)  || \
 150         defined(_M_AMD64)       || defined(_M_X64)      || \
 151         defined(__INTEL__)                              )
 152
 153 extern unsigned int OPENSSL_ia32cap_P[2];
 154
 155 #ifdef VPAES_ASM
 156 #define VPAES_CAPABLE   (OPENSSL_ia32cap_P[1]&(1<<(41-32)))
 157 #endif
 158 #ifdef BSAES_ASM
 159 #define BSAES_CAPABLE   VPAES_CAPABLE
 160 #endif
 161 /*
 162  * AES-NI section
 163  */
 164 #define AESNI_CAPABLE   (OPENSSL_ia32cap_P[1]&(1<<(57-32)))
 165
 166 int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
 167     AES_KEY *key);
 168 int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
 169     AES_KEY *key);
 170
 171 void aesni_encrypt(const unsigned char *in, unsigned char *out,
 172     const AES_KEY *key);
 173 void aesni_decrypt(const unsigned char *in, unsigned char *out,
 174     const AES_KEY *key);
 175
 176 void aesni_ecb_encrypt(const unsigned char *in, unsigned char *out,
 177     size_t length, const AES_KEY *key, int enc);
 178 void aesni_cbc_encrypt(const unsigned char *in, unsigned char *out,
 179     size_t length, const AES_KEY *key, unsigned char *ivec, int enc);
 180
 181 void aesni_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out,
 182     size_t blocks, const void *key, const unsigned char *ivec);
 183
 184 void aesni_xts_encrypt(const unsigned char *in, unsigned char *out,
 185     size_t length, const AES_KEY *key1, const AES_KEY *key2,
 186     const unsigned char iv[16]);
 187
 188 void aesni_xts_decrypt(const unsigned char *in, unsigned char *out,
 189     size_t length, const AES_KEY *key1, const AES_KEY *key2,
 190     const unsigned char iv[16]);
 191
 192 void aesni_ccm64_encrypt_blocks (const unsigned char *in, unsigned char *out,
 193     size_t blocks, const void *key, const unsigned char ivec[16],
 194     unsigned char cmac[16]);
 195
 196 void aesni_ccm64_decrypt_blocks (const unsigned char *in, unsigned char *out,
 197     size_t blocks, const void *key, const unsigned char ivec[16],
 198     unsigned char cmac[16]);
 199
 200 static int
 201 aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 202     const unsigned char *iv, int enc)
 203 {
 204         int ret, mode;
 205         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 206
 207         mode = ctx->cipher->flags & EVP_CIPH_MODE;
 208         if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) &&
 209             !enc) {
 210                 ret = aesni_set_decrypt_key(key, ctx->key_len * 8,
 211                     ctx->cipher_data);
 212                 dat->block = (block128_f)aesni_decrypt;
 213                 dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 214                     (cbc128_f)aesni_cbc_encrypt : NULL;
 215         } else {
 216                 ret = aesni_set_encrypt_key(key, ctx->key_len * 8,
 217                     ctx->cipher_data);
 218                 dat->block = (block128_f)aesni_encrypt;
 219                 if (mode == EVP_CIPH_CBC_MODE)
 220                         dat->stream.cbc = (cbc128_f)aesni_cbc_encrypt;
 221                 else if (mode == EVP_CIPH_CTR_MODE)
 222                         dat->stream.ctr = (ctr128_f)aesni_ctr32_encrypt_blocks;
 223                 else
 224                         dat->stream.cbc = NULL;
 225         }
 226
 227         if (ret < 0) {
 228                 EVPerr(EVP_F_AESNI_INIT_KEY, EVP_R_AES_KEY_SETUP_FAILED);
 229                 return 0;
 230         }
 231
 232         return 1;
 233 }
 234
 235 static int
 236 aesni_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 237     const unsigned char *in, size_t len)
 238 {
 239         aesni_cbc_encrypt(in, out, len, ctx->cipher_data, ctx->iv,
 240             ctx->encrypt);
 241
 242         return 1;
 243 }
 244
 245 static int
 246 aesni_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 247     const unsigned char *in, size_t len)
 248 {
 249         size_t  bl = ctx->cipher->block_size;
 250
 251         if (len < bl)
 252                 return 1;
 253
 254         aesni_ecb_encrypt(in, out, len, ctx->cipher_data, ctx->encrypt);
 255
 256         return 1;
 257 }
 258
 259 #define aesni_ofb_cipher aes_ofb_cipher
 260 static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 261     const unsigned char *in, size_t len);
 262
 263 #define aesni_cfb_cipher aes_cfb_cipher
 264 static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 265     const unsigned char *in, size_t len);
 266
 267 #define aesni_cfb8_cipher aes_cfb8_cipher
 268 static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 269     const unsigned char *in, size_t len);
 270
 271 #define aesni_cfb1_cipher aes_cfb1_cipher
 272 static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 273     const unsigned char *in, size_t len);
 274
 275 #define aesni_ctr_cipher aes_ctr_cipher
 276 static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 277     const unsigned char *in, size_t len);
 278
 279 static int
 280 aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 281     const unsigned char *iv, int enc)
 282 {
 283         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 284
 285         if (!iv && !key)
 286                 return 1;
 287         if (key) {
 288                 aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
 289                 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
 290                     (block128_f)aesni_encrypt);
 291                 gctx->ctr = (ctr128_f)aesni_ctr32_encrypt_blocks;
 292                 /* If we have an iv can set it directly, otherwise use
 293                  * saved IV.
 294                  */
 295                 if (iv == NULL && gctx->iv_set)
 296                         iv = gctx->iv;
 297                 if (iv) {
 298                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 299                         gctx->iv_set = 1;
 300                 }
 301                 gctx->key_set = 1;
 302         } else {
 303                 /* If key set use IV, otherwise copy */
 304                 if (gctx->key_set)
 305                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 306                 else
 307                         memcpy(gctx->iv, iv, gctx->ivlen);
 308                 gctx->iv_set = 1;
 309                 gctx->iv_gen = 0;
 310         }
 311         return 1;
 312 }
 313
 314 #define aesni_gcm_cipher aes_gcm_cipher
 315 static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 316     const unsigned char *in, size_t len);
 317
 318 static int
 319 aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 320     const unsigned char *iv, int enc)
 321 {
 322         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
 323
 324         if (!iv && !key)
 325                 return 1;
 326
 327         if (key) {
 328                 /* key_len is two AES keys */
 329                 if (enc) {
 330                         aesni_set_encrypt_key(key, ctx->key_len * 4,
 331                             &xctx->ks1);
 332                         xctx->xts.block1 = (block128_f)aesni_encrypt;
 333                         xctx->stream = aesni_xts_encrypt;
 334                 } else {
 335                         aesni_set_decrypt_key(key, ctx->key_len * 4,
 336                             &xctx->ks1);
 337                         xctx->xts.block1 = (block128_f)aesni_decrypt;
 338                         xctx->stream = aesni_xts_decrypt;
 339                 }
 340
 341                 aesni_set_encrypt_key(key + ctx->key_len / 2,
 342                     ctx->key_len * 4, &xctx->ks2);
 343                 xctx->xts.block2 = (block128_f)aesni_encrypt;
 344
 345                 xctx->xts.key1 = &xctx->ks1;
 346         }
 347
 348         if (iv) {
 349                 xctx->xts.key2 = &xctx->ks2;
 350                 memcpy(ctx->iv, iv, 16);
 351         }
 352
 353         return 1;
 354 }
 355
 356 #define aesni_xts_cipher aes_xts_cipher
 357 static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 358     const unsigned char *in, size_t len);
 359
 360 static int
 361 aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 362     const unsigned char *iv, int enc)
 363 {
 364         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
 365
 366         if (!iv && !key)
 367                 return 1;
 368         if (key) {
 369                 aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
 370                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 371                     &cctx->ks, (block128_f)aesni_encrypt);
 372                 cctx->str = enc ? (ccm128_f)aesni_ccm64_encrypt_blocks :
 373                     (ccm128_f)aesni_ccm64_decrypt_blocks;
 374                 cctx->key_set = 1;
 375         }
 376         if (iv) {
 377                 memcpy(ctx->iv, iv, 15 - cctx->L);
 378                 cctx->iv_set = 1;
 379         }
 380         return 1;
 381 }
 382
 383 #define aesni_ccm_cipher aes_ccm_cipher
 384 static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 385     const unsigned char *in, size_t len);
 386
 387 #define BLOCK_CIPHER_generic(n,keylen,blocksize,ivlen,nmode,mode,MODE,fl) \
 388 static const EVP_CIPHER aesni_##keylen##_##mode = {                     \
 389         .nid = n##_##keylen##_##nmode,                                  \
 390         .block_size = blocksize,                                        \
 391         .key_len = keylen / 8,                                          \
 392         .iv_len = ivlen,                                                \
 393         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 394         .init = aesni_init_key,                                         \
 395         .do_cipher = aesni_##mode##_cipher,                             \
 396         .ctx_size = sizeof(EVP_AES_KEY)                                 \
 397 };                                                                      \
 398 static const EVP_CIPHER aes_##keylen##_##mode = {                       \
 399         .nid = n##_##keylen##_##nmode,                                  \
 400         .block_size = blocksize,                                        \
 401         .key_len = keylen / 8,                                          \
 402         .iv_len = ivlen,                                                \
 403         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 404         .init = aes_init_key,                                           \
 405         .do_cipher = aes_##mode##_cipher,                               \
 406         .ctx_size = sizeof(EVP_AES_KEY)                                 \
 407 };                                                                      \
 408 const EVP_CIPHER *                                                      \
 409 EVP_aes_##keylen##_##mode(void)                                         \
 410 {                                                                       \
 411         return AESNI_CAPABLE ?                                          \
 412             &aesni_##keylen##_##mode : &aes_##keylen##_##mode;          \
 413 }
 414
 415 #define BLOCK_CIPHER_custom(n,keylen,blocksize,ivlen,mode,MODE,fl)      \
 416 static const EVP_CIPHER aesni_##keylen##_##mode = {                     \
 417         .nid = n##_##keylen##_##mode,                                   \
 418         .block_size = blocksize,                                        \
 419         .key_len =                                                      \
 420             (EVP_CIPH_##MODE##_MODE == EVP_CIPH_XTS_MODE ? 2 : 1) *     \
 421             keylen / 8,                                                 \
 422         .iv_len = ivlen,                                                \
 423         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 424         .init = aesni_##mode##_init_key,                                \
 425         .do_cipher = aesni_##mode##_cipher,                             \
 426         .cleanup = aes_##mode##_cleanup,                                \
 427         .ctx_size = sizeof(EVP_AES_##MODE##_CTX),                       \
 428         .ctrl = aes_##mode##_ctrl                                       \
 429 };                                                                      \
 430 static const EVP_CIPHER aes_##keylen##_##mode = {                       \
 431         .nid = n##_##keylen##_##mode,                                   \
 432         .block_size = blocksize,                                        \
 433         .key_len =                                                      \
 434             (EVP_CIPH_##MODE##_MODE == EVP_CIPH_XTS_MODE ? 2 : 1) *     \
 435             keylen / 8,                                                 \
 436         .iv_len = ivlen,                                                \
 437         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 438         .init = aes_##mode##_init_key,                                  \
 439         .do_cipher = aes_##mode##_cipher,                               \
 440         .cleanup = aes_##mode##_cleanup,                                \
 441         .ctx_size = sizeof(EVP_AES_##MODE##_CTX),                       \
 442         .ctrl = aes_##mode##_ctrl                                       \
 443 };                                                                      \
 444 const EVP_CIPHER *                                                      \
 445 EVP_aes_##keylen##_##mode(void)                                         \
 446 {                                                                       \
 447         return AESNI_CAPABLE ?                                          \
 448             &aesni_##keylen##_##mode : &aes_##keylen##_##mode;          \
 449 }
 450
 451 #else
 452
 453 #define BLOCK_CIPHER_generic(n,keylen,blocksize,ivlen,nmode,mode,MODE,fl) \
 454 static const EVP_CIPHER aes_##keylen##_##mode = {                       \
 455         .nid = n##_##keylen##_##nmode,                                  \
 456         .block_size = blocksize,                                        \
 457         .key_len = keylen / 8,                                          \
 458         .iv_len = ivlen,                                                \
 459         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 460         .init = aes_init_key,                                           \
 461         .do_cipher = aes_##mode##_cipher,                               \
 462         .ctx_size = sizeof(EVP_AES_KEY)                                 \
 463 };                                                                      \
 464 const EVP_CIPHER *                                                      \
 465 EVP_aes_##keylen##_##mode(void)                                         \
 466 {                                                                       \
 467         return &aes_##keylen##_##mode;                                  \
 468 }
 469
 470 #define BLOCK_CIPHER_custom(n,keylen,blocksize,ivlen,mode,MODE,fl)      \
 471 static const EVP_CIPHER aes_##keylen##_##mode = {                       \
 472         .nid = n##_##keylen##_##mode,                                   \
 473         .block_size = blocksize,                                        \
 474         .key_len =                                                      \
 475             (EVP_CIPH_##MODE##_MODE == EVP_CIPH_XTS_MODE ? 2 : 1) *     \
 476             keylen / 8,                                                 \
 477         .iv_len = ivlen,                                                \
 478         .flags = fl | EVP_CIPH_##MODE##_MODE,                           \
 479         .init = aes_##mode##_init_key,                                  \
 480         .do_cipher = aes_##mode##_cipher,                               \
 481         .cleanup = aes_##mode##_cleanup,                                \
 482         .ctx_size = sizeof(EVP_AES_##MODE##_CTX),                       \
 483         .ctrl = aes_##mode##_ctrl                                       \
 484 };                                                                      \
 485 const EVP_CIPHER *                                                      \
 486 EVP_aes_##keylen##_##mode(void)                                         \
 487 {                                                                       \
 488         return &aes_##keylen##_##mode;                                  \
 489 }
 490
 491 #endif
 492
 493 #define BLOCK_CIPHER_generic_pack(nid,keylen,flags)             \
 494         BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
 495         BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)      \
 496         BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 497         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 498         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags)       \
 499         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags)       \
 500         BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
 501
 502 static int
 503 aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 504     const unsigned char *iv, int enc)
 505 {
 506         int ret, mode;
 507         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 508
 509         mode = ctx->cipher->flags & EVP_CIPH_MODE;
 510         if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) &&
 511             !enc)
 512 #ifdef BSAES_CAPABLE
 513                 if (BSAES_CAPABLE && mode == EVP_CIPH_CBC_MODE) {
 514                         ret = AES_set_decrypt_key(key, ctx->key_len * 8,
 515                             &dat->ks);
 516                         dat->block = (block128_f)AES_decrypt;
 517                         dat->stream.cbc = (cbc128_f)bsaes_cbc_encrypt;
 518                 } else
 519 #endif
 520 #ifdef VPAES_CAPABLE
 521                 if (VPAES_CAPABLE) {
 522                         ret = vpaes_set_decrypt_key(key, ctx->key_len * 8,
 523                             &dat->ks);
 524                         dat->block = (block128_f)vpaes_decrypt;
 525                         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 526                             (cbc128_f)vpaes_cbc_encrypt : NULL;
 527                 } else
 528 #endif
 529                 {
 530                         ret = AES_set_decrypt_key(key, ctx->key_len * 8,
 531                             &dat->ks);
 532                         dat->block = (block128_f)AES_decrypt;
 533                         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 534                             (cbc128_f)AES_cbc_encrypt : NULL;
 535                 } else
 536 #ifdef BSAES_CAPABLE
 537                 if (BSAES_CAPABLE && mode == EVP_CIPH_CTR_MODE) {
 538                         ret = AES_set_encrypt_key(key, ctx->key_len * 8,
 539                             &dat->ks);
 540                         dat->block = (block128_f)AES_encrypt;
 541                         dat->stream.ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks;
 542                 } else
 543 #endif
 544 #ifdef VPAES_CAPABLE
 545                 if (VPAES_CAPABLE) {
 546                         ret = vpaes_set_encrypt_key(key, ctx->key_len * 8,
 547                             &dat->ks);
 548                         dat->block = (block128_f)vpaes_encrypt;
 549                         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 550                             (cbc128_f)vpaes_cbc_encrypt : NULL;
 551                 } else
 552 #endif
 553                 {
 554                         ret = AES_set_encrypt_key(key, ctx->key_len * 8,
 555                             &dat->ks);
 556                         dat->block = (block128_f)AES_encrypt;
 557                         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 558                             (cbc128_f)AES_cbc_encrypt : NULL;
 559 #ifdef AES_CTR_ASM
 560                         if (mode == EVP_CIPH_CTR_MODE)
 561                                 dat->stream.ctr = (ctr128_f)AES_ctr32_encrypt;
 562 #endif
 563                 }
 564
 565         if (ret < 0) {
 566                 EVPerr(EVP_F_AES_INIT_KEY, EVP_R_AES_KEY_SETUP_FAILED);
 567                 return 0;
 568         }
 569
 570         return 1;
 571 }
 572
 573 static int
 574 aes_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 575     const unsigned char *in, size_t len)
 576 {
 577         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 578
 579         if (dat->stream.cbc)
 580                 (*dat->stream.cbc)(in, out, len, &dat->ks, ctx->iv,
 581                     ctx->encrypt);
 582         else if (ctx->encrypt)
 583                 CRYPTO_cbc128_encrypt(in, out, len, &dat->ks, ctx->iv,
 584                     dat->block);
 585         else
 586                 CRYPTO_cbc128_decrypt(in, out, len, &dat->ks, ctx->iv,
 587                     dat->block);
 588
 589         return 1;
 590 }
 591
 592 static int
 593 aes_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 594     const unsigned char *in, size_t len)
 595 {
 596         size_t  bl = ctx->cipher->block_size;
 597         size_t  i;
 598         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 599
 600         if (len < bl)
 601                 return 1;
 602
 603         for (i = 0, len -= bl; i <= len; i += bl)
 604                 (*dat->block)(in + i, out + i, &dat->ks);
 605
 606         return 1;
 607 }
 608
 609 static int
 610 aes_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 611     const unsigned char *in, size_t len)
 612 {
 613         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 614
 615         CRYPTO_ofb128_encrypt(in, out, len, &dat->ks, ctx->iv, &ctx->num,
 616             dat->block);
 617         return 1;
 618 }
 619
 620 static int
 621 aes_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 622     const unsigned char *in, size_t len)
 623 {
 624         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 625
 626         CRYPTO_cfb128_encrypt(in, out, len, &dat->ks, ctx->iv, &ctx->num,
 627             ctx->encrypt, dat->block);
 628         return 1;
 629 }
 630
 631 static int
 632 aes_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 633     const unsigned char *in, size_t len)
 634 {
 635         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 636
 637         CRYPTO_cfb128_8_encrypt(in, out, len, &dat->ks, ctx->iv, &ctx->num,
 638             ctx->encrypt, dat->block);
 639         return 1;
 640 }
 641
 642 static int
 643 aes_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 644     const unsigned char *in, size_t len)
 645 {
 646         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 647
 648         if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
 649                 CRYPTO_cfb128_1_encrypt(in, out, len, &dat->ks, ctx->iv,
 650                     &ctx->num, ctx->encrypt, dat->block);
 651                 return 1;
 652         }
 653
 654         while (len >= MAXBITCHUNK) {
 655                 CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK*8, &dat->ks,
 656                     ctx->iv, &ctx->num, ctx->encrypt, dat->block);
 657                 len -= MAXBITCHUNK;
 658         }
 659         if (len)
 660                 CRYPTO_cfb128_1_encrypt(in, out, len*8, &dat->ks,
 661                     ctx->iv, &ctx->num, ctx->encrypt, dat->block);
 662
 663         return 1;
 664 }
 665
 666 static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
 667     const unsigned char *in, size_t len)
 668 {
 669         unsigned int num = ctx->num;
 670         EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
 671
 672         if (dat->stream.ctr)
 673                 CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks,
 674                     ctx->iv, ctx->buf, &num, dat->stream.ctr);
 675         else
 676                 CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,
 677                     ctx->iv, ctx->buf, &num, dat->block);
 678         ctx->num = (size_t)num;
 679         return 1;
 680 }
 681
 682 BLOCK_CIPHER_generic_pack(NID_aes, 128, EVP_CIPH_FLAG_FIPS)
 683 BLOCK_CIPHER_generic_pack(NID_aes, 192, EVP_CIPH_FLAG_FIPS)
 684 BLOCK_CIPHER_generic_pack(NID_aes, 256, EVP_CIPH_FLAG_FIPS)
 685
 686 static int
 687 aes_gcm_cleanup(EVP_CIPHER_CTX *c)
 688 {
 689         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 690
 691         if (gctx->iv != c->iv)
 692                 free(gctx->iv);
 693         explicit_bzero(gctx, sizeof(*gctx));
 694         return 1;
 695 }
 696
 697 /* increment counter (64-bit int) by 1 */
 698 static void
 699 ctr64_inc(unsigned char *counter)
 700 {
 701         int n = 8;
 702         unsigned char  c;
 703
 704         do {
 705                 --n;
 706                 c = counter[n];
 707                 ++c;
 708                 counter[n] = c;
 709                 if (c)
 710                         return;
 711         } while (n);
 712 }
 713
 714 static int
 715 aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 716 {
 717         EVP_AES_GCM_CTX *gctx = c->cipher_data;
 718
 719         switch (type) {
 720         case EVP_CTRL_INIT:
 721                 gctx->key_set = 0;
 722                 gctx->iv_set = 0;
 723                 gctx->ivlen = c->cipher->iv_len;
 724                 gctx->iv = c->iv;
 725                 gctx->taglen = -1;
 726                 gctx->iv_gen = 0;
 727                 gctx->tls_aad_len = -1;
 728                 return 1;
 729
 730         case EVP_CTRL_GCM_SET_IVLEN:
 731                 if (arg <= 0)
 732                         return 0;
 733                 /* Allocate memory for IV if needed */
 734                 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) {
 735                         if (gctx->iv != c->iv)
 736                                 free(gctx->iv);
 737                         gctx->iv = malloc(arg);
 738                         if (!gctx->iv)
 739                                 return 0;
 740                 }
 741                 gctx->ivlen = arg;
 742                 return 1;
 743
 744         case EVP_CTRL_GCM_SET_TAG:
 745                 if (arg <= 0 || arg > 16 || c->encrypt)
 746                         return 0;
 747                 memcpy(c->buf, ptr, arg);
 748                 gctx->taglen = arg;
 749                 return 1;
 750
 751         case EVP_CTRL_GCM_GET_TAG:
 752                 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
 753                         return 0;
 754                 memcpy(ptr, c->buf, arg);
 755                 return 1;
 756
 757         case EVP_CTRL_GCM_SET_IV_FIXED:
 758                 /* Special case: -1 length restores whole IV */
 759                 if (arg == -1) {
 760                         memcpy(gctx->iv, ptr, gctx->ivlen);
 761                         gctx->iv_gen = 1;
 762                         return 1;
 763                 }
 764                 /* Fixed field must be at least 4 bytes and invocation field
 765                  * at least 8.
 766                  */
 767                 if ((arg < 4) || (gctx->ivlen - arg) < 8)
 768                         return 0;
 769                 if (arg)
 770                         memcpy(gctx->iv, ptr, arg);
 771                 if (c->encrypt)
 772                         arc4random_buf(gctx->iv + arg, gctx->ivlen - arg);
 773                 gctx->iv_gen = 1;
 774                 return 1;
 775
 776         case EVP_CTRL_GCM_IV_GEN:
 777                 if (gctx->iv_gen == 0 || gctx->key_set == 0)
 778                         return 0;
 779                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 780                 if (arg <= 0 || arg > gctx->ivlen)
 781                         arg = gctx->ivlen;
 782                 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
 783                 /* Invocation field will be at least 8 bytes in size and
 784                  * so no need to check wrap around or increment more than
 785                  * last 8 bytes.
 786                  */
 787                 ctr64_inc(gctx->iv + gctx->ivlen - 8);
 788                 gctx->iv_set = 1;
 789                 return 1;
 790
 791         case EVP_CTRL_GCM_SET_IV_INV:
 792                 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt)
 793                         return 0;
 794                 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
 795                 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 796                 gctx->iv_set = 1;
 797                 return 1;
 798
 799         case EVP_CTRL_AEAD_TLS1_AAD:
 800                 /* Save the AAD for later use */
 801                 if (arg != 13)
 802                         return 0;
 803                 memcpy(c->buf, ptr, arg);
 804                 gctx->tls_aad_len = arg;
 805                 {
 806                         unsigned int len = c->buf[arg - 2] << 8 |
 807                             c->buf[arg - 1];
 808
 809                         /* Correct length for explicit IV */
 810                         len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
 811
 812                         /* If decrypting correct for tag too */
 813                         if (!c->encrypt)
 814                                 len -= EVP_GCM_TLS_TAG_LEN;
 815                         c->buf[arg - 2] = len >> 8;
 816                         c->buf[arg - 1] = len & 0xff;
 817                 }
 818                 /* Extra padding: tag appended to record */
 819                 return EVP_GCM_TLS_TAG_LEN;
 820
 821         case EVP_CTRL_COPY:
 822             {
 823                 EVP_CIPHER_CTX *out = ptr;
 824                 EVP_AES_GCM_CTX *gctx_out = out->cipher_data;
 825
 826                 if (gctx->gcm.key) {
 827                         if (gctx->gcm.key != &gctx->ks)
 828                                 return 0;
 829                         gctx_out->gcm.key = &gctx_out->ks;
 830                 }
 831                 if (gctx->iv == c->iv)
 832                         gctx_out->iv = out->iv;
 833                 else {
 834                         gctx_out->iv = malloc(gctx->ivlen);
 835                         if (!gctx_out->iv)
 836                                 return 0;
 837                         memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
 838                 }
 839                 return 1;
 840             }
 841
 842         default:
 843                 return -1;
 844
 845         }
 846 }
 847
 848 static ctr128_f
 849 aes_gcm_set_key(AES_KEY *aes_key, GCM128_CONTEXT *gcm_ctx,
 850     const unsigned char *key, size_t key_len)
 851 {
 852 #ifdef BSAES_CAPABLE
 853         if (BSAES_CAPABLE) {
 854                 AES_set_encrypt_key(key, key_len * 8, aes_key);
 855                 CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f)AES_encrypt);
 856                 return (ctr128_f)bsaes_ctr32_encrypt_blocks;
 857         } else
 858 #endif
 859 #ifdef VPAES_CAPABLE
 860         if (VPAES_CAPABLE) {
 861                 vpaes_set_encrypt_key(key, key_len * 8, aes_key);
 862                 CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f)vpaes_encrypt);
 863                 return NULL;
 864         } else
 865 #endif
 866                 (void)0; /* terminate potentially open 'else' */
 867
 868         AES_set_encrypt_key(key, key_len * 8, aes_key);
 869         CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f)AES_encrypt);
 870 #ifdef AES_CTR_ASM
 871         return (ctr128_f)AES_ctr32_encrypt;
 872 #else
 873         return NULL;
 874 #endif
 875 }
 876
 877 static int
 878 aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 879     const unsigned char *iv, int enc)
 880 {
 881         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 882
 883         if (!iv && !key)
 884                 return 1;
 885         if (key) {
 886                 gctx->ctr = aes_gcm_set_key(&gctx->ks, &gctx->gcm,
 887                     key, ctx->key_len);
 888
 889                 /* If we have an iv can set it directly, otherwise use
 890                  * saved IV.
 891                  */
 892                 if (iv == NULL && gctx->iv_set)
 893                         iv = gctx->iv;
 894                 if (iv) {
 895                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 896                         gctx->iv_set = 1;
 897                 }
 898                 gctx->key_set = 1;
 899         } else {
 900                 /* If key set use IV, otherwise copy */
 901                 if (gctx->key_set)
 902                         CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 903                 else
 904                         memcpy(gctx->iv, iv, gctx->ivlen);
 905                 gctx->iv_set = 1;
 906                 gctx->iv_gen = 0;
 907         }
 908         return 1;
 909 }
 910
 911 /* Handle TLS GCM packet format. This consists of the last portion of the IV
 912  * followed by the payload and finally the tag. On encrypt generate IV,
 913  * encrypt payload and write the tag. On verify retrieve IV, decrypt payload
 914  * and verify tag.
 915  */
 916
 917 static int
 918 aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 919     const unsigned char *in, size_t len)
 920 {
 921         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 922         int rv = -1;
 923
 924         /* Encrypt/decrypt must be performed in place */
 925         if (out != in ||
 926             len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))
 927                 return -1;
 928
 929         /* Set IV from start of buffer or generate IV and write to start
 930          * of buffer.
 931          */
 932         if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ?
 933             EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
 934             EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
 935                 goto err;
 936
 937         /* Use saved AAD */
 938         if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len))
 939                 goto err;
 940
 941         /* Fix buffer and length to point to payload */
 942         in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 943         out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 944         len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 945         if (ctx->encrypt) {
 946                 /* Encrypt payload */
 947                 if (gctx->ctr) {
 948                         if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, in, out,
 949                             len, gctx->ctr))
 950                                 goto err;
 951                 } else {
 952                         if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 953                                 goto err;
 954                 }
 955                 out += len;
 956
 957                 /* Finally write tag */
 958                 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
 959                 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 960         } else {
 961                 /* Decrypt */
 962                 if (gctx->ctr) {
 963                         if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, in, out,
 964                             len, gctx->ctr))
 965                                 goto err;
 966                 } else {
 967                         if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 968                                 goto err;
 969                 }
 970                 /* Retrieve tag */
 971                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, EVP_GCM_TLS_TAG_LEN);
 972
 973                 /* If tag mismatch wipe buffer */
 974                 if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) {
 975                         explicit_bzero(out, len);
 976                         goto err;
 977                 }
 978                 rv = len;
 979         }
 980
 981 err:
 982         gctx->iv_set = 0;
 983         gctx->tls_aad_len = -1;
 984         return rv;
 985 }
 986
 987 static int
 988 aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 989     const unsigned char *in, size_t len)
 990 {
 991         EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
 992
 993         /* If not set up, return error */
 994         if (!gctx->key_set)
 995                 return -1;
 996
 997         if (gctx->tls_aad_len >= 0)
 998                 return aes_gcm_tls_cipher(ctx, out, in, len);
 999
1000         if (!gctx->iv_set)
1001                 return -1;
1002
1003         if (in) {
1004                 if (out == NULL) {
1005                         if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
1006                                 return -1;
1007                 } else if (ctx->encrypt) {
1008                         if (gctx->ctr) {
1009                                 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm,
1010                                     in, out, len, gctx->ctr))
1011                                         return -1;
1012                         } else {
1013                                 if (CRYPTO_gcm128_encrypt(&gctx->gcm,
1014                                     in, out, len))
1015                                         return -1;
1016                         }
1017                 } else {
1018                         if (gctx->ctr) {
1019                                 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
1020                                     in, out, len, gctx->ctr))
1021                                         return -1;
1022                         } else {
1023                                 if (CRYPTO_gcm128_decrypt(&gctx->gcm,
1024                                     in, out, len))
1025                                         return -1;
1026                         }
1027                 }
1028                 return len;
1029         } else {
1030                 if (!ctx->encrypt) {
1031                         if (gctx->taglen < 0)
1032                                 return -1;
1033                         if (CRYPTO_gcm128_finish(&gctx->gcm, ctx->buf,
1034                             gctx->taglen) != 0)
1035                                 return -1;
1036                         gctx->iv_set = 0;
1037                         return 0;
1038                 }
1039                 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
1040                 gctx->taglen = 16;
1041
1042                 /* Don't reuse the IV */
1043                 gctx->iv_set = 0;
1044                 return 0;
1045         }
1046
1047 }
1048
1049 #define CUSTOM_FLAGS \
1050     ( EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV | \
1051       EVP_CIPH_FLAG_CUSTOM_CIPHER | EVP_CIPH_ALWAYS_CALL_INIT | \
1052       EVP_CIPH_CTRL_INIT | EVP_CIPH_CUSTOM_COPY )
1053
1054 BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, gcm, GCM,
1055     EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1056 BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, gcm, GCM,
1057     EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1058 BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, gcm, GCM,
1059     EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS)
1060
1061 static int
1062 aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1063 {
1064         EVP_AES_XTS_CTX *xctx = c->cipher_data;
1065
1066         switch (type) {
1067         case EVP_CTRL_INIT:
1068                 /*
1069                  * key1 and key2 are used as an indicator both key and IV
1070                  * are set
1071                  */
1072                 xctx->xts.key1 = NULL;
1073                 xctx->xts.key2 = NULL;
1074                 return 1;
1075
1076         case EVP_CTRL_COPY:
1077             {
1078                 EVP_CIPHER_CTX *out = ptr;
1079                 EVP_AES_XTS_CTX *xctx_out = out->cipher_data;
1080
1081                 if (xctx->xts.key1) {
1082                         if (xctx->xts.key1 != &xctx->ks1)
1083                                 return 0;
1084                         xctx_out->xts.key1 = &xctx_out->ks1;
1085                 }
1086                 if (xctx->xts.key2) {
1087                         if (xctx->xts.key2 != &xctx->ks2)
1088                                 return 0;
1089                         xctx_out->xts.key2 = &xctx_out->ks2;
1090                 }
1091                 return 1;
1092             }
1093         }
1094         return -1;
1095 }
1096
1097 static int
1098 aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1099     const unsigned char *iv, int enc)
1100 {
1101         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1102
1103         if (!iv && !key)
1104                 return 1;
1105
1106         if (key) do {
1107 #ifdef AES_XTS_ASM
1108                 xctx->stream = enc ? AES_xts_encrypt : AES_xts_decrypt;
1109 #else
1110                 xctx->stream = NULL;
1111 #endif
1112                 /* key_len is two AES keys */
1113 #ifdef BSAES_CAPABLE
1114                 if (BSAES_CAPABLE)
1115                         xctx->stream = enc ? bsaes_xts_encrypt :
1116                             bsaes_xts_decrypt;
1117                 else
1118 #endif
1119 #ifdef VPAES_CAPABLE
1120                 if (VPAES_CAPABLE) {
1121                         if (enc) {
1122                                 vpaes_set_encrypt_key(key, ctx->key_len * 4,
1123                                     &xctx->ks1);
1124                                 xctx->xts.block1 = (block128_f)vpaes_encrypt;
1125                         } else {
1126                                 vpaes_set_decrypt_key(key, ctx->key_len * 4,
1127                                     &xctx->ks1);
1128                                 xctx->xts.block1 = (block128_f)vpaes_decrypt;
1129                         }
1130
1131                         vpaes_set_encrypt_key(key + ctx->key_len / 2,
1132                             ctx->key_len * 4, &xctx->ks2);
1133                         xctx->xts.block2 = (block128_f)vpaes_encrypt;
1134
1135                         xctx->xts.key1 = &xctx->ks1;
1136                         break;
1137                 } else
1138 #endif
1139                         (void)0;        /* terminate potentially open 'else' */
1140
1141                 if (enc) {
1142                         AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1143                         xctx->xts.block1 = (block128_f)AES_encrypt;
1144                 } else {
1145                         AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
1146                         xctx->xts.block1 = (block128_f)AES_decrypt;
1147                 }
1148
1149                 AES_set_encrypt_key(key + ctx->key_len / 2,
1150                     ctx->key_len * 4, &xctx->ks2);
1151                 xctx->xts.block2 = (block128_f)AES_encrypt;
1152
1153                 xctx->xts.key1 = &xctx->ks1;
1154         } while (0);
1155
1156         if (iv) {
1157                 xctx->xts.key2 = &xctx->ks2;
1158                 memcpy(ctx->iv, iv, 16);
1159         }
1160
1161         return 1;
1162 }
1163
1164 static int
1165 aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1166     const unsigned char *in, size_t len)
1167 {
1168         EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
1169
1170         if (!xctx->xts.key1 || !xctx->xts.key2)
1171                 return 0;
1172         if (!out || !in || len < AES_BLOCK_SIZE)
1173                 return 0;
1174
1175         if (xctx->stream)
1176                 (*xctx->stream)(in, out, len, xctx->xts.key1, xctx->xts.key2,
1177                     ctx->iv);
1178         else if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
1179             ctx->encrypt))
1180                 return 0;
1181         return 1;
1182 }
1183
1184 #define aes_xts_cleanup NULL
1185
1186 #define XTS_FLAGS \
1187     ( EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV | \
1188       EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT | EVP_CIPH_CUSTOM_COPY )
1189
1190 BLOCK_CIPHER_custom(NID_aes, 128, 1, 16, xts, XTS, EVP_CIPH_FLAG_FIPS|XTS_FLAGS)
1191 BLOCK_CIPHER_custom(NID_aes, 256, 1, 16, xts, XTS, EVP_CIPH_FLAG_FIPS|XTS_FLAGS)
1192
1193 static int
1194 aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
1195 {
1196         EVP_AES_CCM_CTX *cctx = c->cipher_data;
1197
1198         switch (type) {
1199         case EVP_CTRL_INIT:
1200                 cctx->key_set = 0;
1201                 cctx->iv_set = 0;
1202                 cctx->L = 8;
1203                 cctx->M = 12;
1204                 cctx->tag_set = 0;
1205                 cctx->len_set = 0;
1206                 return 1;
1207
1208         case EVP_CTRL_CCM_SET_IVLEN:
1209                 arg = 15 - arg;
1210
1211         case EVP_CTRL_CCM_SET_L:
1212                 if (arg < 2 || arg > 8)
1213                         return 0;
1214                 cctx->L = arg;
1215                 return 1;
1216
1217         case EVP_CTRL_CCM_SET_TAG:
1218                 if ((arg & 1) || arg < 4 || arg > 16)
1219                         return 0;
1220                 if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
1221                         return 0;
1222                 if (ptr) {
1223                         cctx->tag_set = 1;
1224                         memcpy(c->buf, ptr, arg);
1225                 }
1226                 cctx->M = arg;
1227                 return 1;
1228
1229         case EVP_CTRL_CCM_GET_TAG:
1230                 if (!c->encrypt || !cctx->tag_set)
1231                         return 0;
1232                 if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
1233                         return 0;
1234                 cctx->tag_set = 0;
1235                 cctx->iv_set = 0;
1236                 cctx->len_set = 0;
1237                 return 1;
1238
1239         case EVP_CTRL_COPY:
1240             {
1241                 EVP_CIPHER_CTX *out = ptr;
1242                 EVP_AES_CCM_CTX *cctx_out = out->cipher_data;
1243
1244                 if (cctx->ccm.key) {
1245                         if (cctx->ccm.key != &cctx->ks)
1246                                 return 0;
1247                         cctx_out->ccm.key = &cctx_out->ks;
1248                 }
1249                 return 1;
1250             }
1251
1252         default:
1253                 return -1;
1254         }
1255 }
1256
1257 static int
1258 aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1259     const unsigned char *iv, int enc)
1260 {
1261         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1262
1263         if (!iv && !key)
1264                 return 1;
1265         if (key) do {
1266 #ifdef VPAES_CAPABLE
1267                 if (VPAES_CAPABLE) {
1268                         vpaes_set_encrypt_key(key, ctx->key_len*8, &cctx->ks);
1269                         CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1270                             &cctx->ks, (block128_f)vpaes_encrypt);
1271                         cctx->str = NULL;
1272                         cctx->key_set = 1;
1273                         break;
1274                 }
1275 #endif
1276                 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
1277                 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
1278                     &cctx->ks, (block128_f)AES_encrypt);
1279                 cctx->str = NULL;
1280                 cctx->key_set = 1;
1281         } while (0);
1282         if (iv) {
1283                 memcpy(ctx->iv, iv, 15 - cctx->L);
1284                 cctx->iv_set = 1;
1285         }
1286         return 1;
1287 }
1288
1289 static int
1290 aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1291     const unsigned char *in, size_t len)
1292 {
1293         EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
1294         CCM128_CONTEXT *ccm = &cctx->ccm;
1295
1296         /* If not set up, return error */
1297         if (!cctx->iv_set && !cctx->key_set)
1298                 return -1;
1299         if (!ctx->encrypt && !cctx->tag_set)
1300                 return -1;
1301
1302         if (!out) {
1303                 if (!in) {
1304                         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,
1305                             len))
1306                                 return -1;
1307                         cctx->len_set = 1;
1308                         return len;
1309                 }
1310                 /* If have AAD need message length */
1311                 if (!cctx->len_set && len)
1312                         return -1;
1313                 CRYPTO_ccm128_aad(ccm, in, len);
1314                 return len;
1315         }
1316         /* EVP_*Final() doesn't return any data */
1317         if (!in)
1318                 return 0;
1319         /* If not set length yet do it */
1320         if (!cctx->len_set) {
1321                 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
1322                         return -1;
1323                 cctx->len_set = 1;
1324         }
1325         if (ctx->encrypt) {
1326                 if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
1327                     cctx->str) : CRYPTO_ccm128_encrypt(ccm, in, out, len))
1328                         return -1;
1329                 cctx->tag_set = 1;
1330                 return len;
1331         } else {
1332                 int rv = -1;
1333                 if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
1334                     cctx->str) : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
1335                         unsigned char tag[16];
1336                         if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
1337                                 if (!memcmp(tag, ctx->buf, cctx->M))
1338                                         rv = len;
1339                         }
1340                 }
1341                 if (rv == -1)
1342                         explicit_bzero(out, len);
1343                 cctx->iv_set = 0;
1344                 cctx->tag_set = 0;
1345                 cctx->len_set = 0;
1346                 return rv;
1347         }
1348
1349 }
1350
1351 #define aes_ccm_cleanup NULL
1352
1353 BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, ccm, CCM,
1354     EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1355 BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, ccm, CCM,
1356     EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1357 BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, ccm, CCM,
1358     EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS)
1359
1360 #define EVP_AEAD_AES_GCM_TAG_LEN 16
1361
1362 struct aead_aes_gcm_ctx {
1363         union {
1364                 double align;
1365                 AES_KEY ks;
1366         } ks;
1367         GCM128_CONTEXT gcm;
1368         ctr128_f ctr;
1369         unsigned char tag_len;
1370 };
1371
1372 static int
1373 aead_aes_gcm_init(EVP_AEAD_CTX *ctx, const unsigned char *key, size_t key_len,
1374     size_t tag_len)
1375 {
1376         struct aead_aes_gcm_ctx *gcm_ctx;
1377         const size_t key_bits = key_len * 8;
1378
1379         /* EVP_AEAD_CTX_init should catch this. */
1380         if (key_bits != 128 && key_bits != 256) {
1381                 EVPerr(EVP_F_AEAD_AES_GCM_INIT, EVP_R_BAD_KEY_LENGTH);
1382                 return 0;
1383         }
1384
1385         if (tag_len == EVP_AEAD_DEFAULT_TAG_LENGTH)
1386                 tag_len = EVP_AEAD_AES_GCM_TAG_LEN;
1387
1388         if (tag_len > EVP_AEAD_AES_GCM_TAG_LEN) {
1389                 EVPerr(EVP_F_AEAD_AES_GCM_INIT, EVP_R_TAG_TOO_LARGE);
1390                 return 0;
1391         }
1392
1393         gcm_ctx = malloc(sizeof(struct aead_aes_gcm_ctx));
1394         if (gcm_ctx == NULL)
1395                 return 0;
1396
1397 #ifdef AESNI_CAPABLE
1398         if (AESNI_CAPABLE) {
1399                 aesni_set_encrypt_key(key, key_bits, &gcm_ctx->ks.ks);
1400                 CRYPTO_gcm128_init(&gcm_ctx->gcm, &gcm_ctx->ks.ks,
1401                     (block128_f)aesni_encrypt);
1402                 gcm_ctx->ctr = (ctr128_f) aesni_ctr32_encrypt_blocks;
1403         } else
1404 #endif
1405         {
1406                 gcm_ctx->ctr = aes_gcm_set_key(&gcm_ctx->ks.ks, &gcm_ctx->gcm,
1407                     key, key_len);
1408         }
1409         gcm_ctx->tag_len = tag_len;
1410         ctx->aead_state = gcm_ctx;
1411
1412         return 1;
1413 }
1414
1415 static void
1416 aead_aes_gcm_cleanup(EVP_AEAD_CTX *ctx)
1417 {
1418         struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
1419
1420         explicit_bzero(gcm_ctx, sizeof(*gcm_ctx));
1421         free(gcm_ctx);
1422 }
1423
1424 static int
1425 aead_aes_gcm_seal(const EVP_AEAD_CTX *ctx, unsigned char *out, size_t *out_len,
1426     size_t max_out_len, const unsigned char *nonce, size_t nonce_len,
1427     const unsigned char *in, size_t in_len, const unsigned char *ad,
1428     size_t ad_len)
1429 {
1430         const struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
1431         GCM128_CONTEXT gcm;
1432         size_t bulk = 0;
1433
1434         if (max_out_len < in_len + gcm_ctx->tag_len) {
1435                 EVPerr(EVP_F_AEAD_AES_GCM_SEAL, EVP_R_BUFFER_TOO_SMALL);
1436                 return 0;
1437         }
1438
1439         memcpy(&gcm, &gcm_ctx->gcm, sizeof(gcm));
1440         CRYPTO_gcm128_setiv(&gcm, nonce, nonce_len);
1441
1442         if (ad_len > 0 && CRYPTO_gcm128_aad(&gcm, ad, ad_len))
1443                 return 0;
1444
1445         if (gcm_ctx->ctr) {
1446                 if (CRYPTO_gcm128_encrypt_ctr32(&gcm, in + bulk, out + bulk,
1447                     in_len - bulk, gcm_ctx->ctr))
1448                         return 0;
1449         } else {
1450                 if (CRYPTO_gcm128_encrypt(&gcm, in + bulk, out + bulk,
1451                     in_len - bulk))
1452                         return 0;
1453         }
1454
1455         CRYPTO_gcm128_tag(&gcm, out + in_len, gcm_ctx->tag_len);
1456         *out_len = in_len + gcm_ctx->tag_len;
1457
1458         return 1;
1459 }
1460
1461 static int
1462 aead_aes_gcm_open(const EVP_AEAD_CTX *ctx, unsigned char *out, size_t *out_len,
1463     size_t max_out_len, const unsigned char *nonce, size_t nonce_len,
1464     const unsigned char *in, size_t in_len, const unsigned char *ad,
1465     size_t ad_len)
1466 {
1467         const struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
1468         unsigned char tag[EVP_AEAD_AES_GCM_TAG_LEN];
1469         GCM128_CONTEXT gcm;
1470         size_t plaintext_len;
1471         size_t bulk = 0;
1472
1473         if (in_len < gcm_ctx->tag_len) {
1474                 EVPerr(EVP_F_AEAD_AES_GCM_OPEN, EVP_R_BAD_DECRYPT);
1475                 return 0;
1476         }
1477
1478         plaintext_len = in_len - gcm_ctx->tag_len;
1479
1480         if (max_out_len < plaintext_len) {
1481                 EVPerr(EVP_F_AEAD_AES_GCM_OPEN, EVP_R_BUFFER_TOO_SMALL);
1482                 return 0;
1483         }
1484
1485         memcpy(&gcm, &gcm_ctx->gcm, sizeof(gcm));
1486         CRYPTO_gcm128_setiv(&gcm, nonce, nonce_len);
1487
1488         if (CRYPTO_gcm128_aad(&gcm, ad, ad_len))
1489                 return 0;
1490
1491         if (gcm_ctx->ctr) {
1492                 if (CRYPTO_gcm128_decrypt_ctr32(&gcm, in + bulk, out + bulk,
1493                     in_len - bulk - gcm_ctx->tag_len, gcm_ctx->ctr))
1494                         return 0;
1495         } else {
1496                 if (CRYPTO_gcm128_decrypt(&gcm, in + bulk, out + bulk,
1497                     in_len - bulk - gcm_ctx->tag_len))
1498                         return 0;
1499         }
1500
1501         CRYPTO_gcm128_tag(&gcm, tag, gcm_ctx->tag_len);
1502         if (timingsafe_memcmp(tag, in + plaintext_len, gcm_ctx->tag_len) != 0) {
1503                 EVPerr(EVP_F_AEAD_AES_GCM_OPEN, EVP_R_BAD_DECRYPT);
1504                 return 0;
1505         }
1506
1507         *out_len = plaintext_len;
1508
1509         return 1;
1510 }
1511
1512 static const EVP_AEAD aead_aes_128_gcm = {
1513         .key_len = 16,
1514         .nonce_len = 12,
1515         .overhead = EVP_AEAD_AES_GCM_TAG_LEN,
1516         .max_tag_len = EVP_AEAD_AES_GCM_TAG_LEN,
1517
1518         .init = aead_aes_gcm_init,
1519         .cleanup = aead_aes_gcm_cleanup,
1520         .seal = aead_aes_gcm_seal,
1521         .open = aead_aes_gcm_open,
1522 };
1523
1524 static const EVP_AEAD aead_aes_256_gcm = {
1525         .key_len = 32,
1526         .nonce_len = 12,
1527         .overhead = EVP_AEAD_AES_GCM_TAG_LEN,
1528         .max_tag_len = EVP_AEAD_AES_GCM_TAG_LEN,
1529
1530         .init = aead_aes_gcm_init,
1531         .cleanup = aead_aes_gcm_cleanup,
1532         .seal = aead_aes_gcm_seal,
1533         .open = aead_aes_gcm_open,
1534 };
1535
1536 const EVP_AEAD *
1537 EVP_aead_aes_128_gcm(void)
1538 {
1539         return &aead_aes_128_gcm;
1540 }
1541
1542 const EVP_AEAD *
1543 EVP_aead_aes_256_gcm(void)
1544 {
1545         return &aead_aes_256_gcm;
1546 }
1547
1548 #endif