e_aes.c revision 296341
1/* ==================================================================== 2 * Copyright (c) 2001-2011 The OpenSSL Project. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in 13 * the documentation and/or other materials provided with the 14 * distribution. 15 * 16 * 3. All advertising materials mentioning features or use of this 17 * software must display the following acknowledgment: 18 * "This product includes software developed by the OpenSSL Project 19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 20 * 21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 22 * endorse or promote products derived from this software without 23 * prior written permission. For written permission, please contact 24 * openssl-core@openssl.org. 25 * 26 * 5. Products derived from this software may not be called "OpenSSL" 27 * nor may "OpenSSL" appear in their names without prior written 28 * permission of the OpenSSL Project. 29 * 30 * 6. Redistributions of any form whatsoever must retain the following 31 * acknowledgment: 32 * "This product includes software developed by the OpenSSL Project 33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 34 * 35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 46 * OF THE POSSIBILITY OF SUCH DAMAGE. 47 * ==================================================================== 48 * 49 */ 50 51#include <openssl/opensslconf.h> 52#ifndef OPENSSL_NO_AES 53#include <openssl/crypto.h> 54# include <openssl/evp.h> 55# include <openssl/err.h> 56# include <string.h> 57# include <assert.h> 58# include <openssl/aes.h> 59# include "evp_locl.h" 60# ifndef OPENSSL_FIPS 61# include "modes_lcl.h" 62# include <openssl/rand.h> 63 64typedef struct { 65 AES_KEY ks; 66 block128_f block; 67 union { 68 cbc128_f cbc; 69 ctr128_f ctr; 70 } stream; 71} EVP_AES_KEY; 72 73typedef struct { 74 AES_KEY ks; /* AES key schedule to use */ 75 int key_set; /* Set if key initialised */ 76 int iv_set; /* Set if an iv is set */ 77 GCM128_CONTEXT gcm; 78 unsigned char *iv; /* Temporary IV store */ 79 int ivlen; /* IV length */ 80 int taglen; 81 int iv_gen; /* It is OK to generate IVs */ 82 int tls_aad_len; /* TLS AAD length */ 83 ctr128_f ctr; 84} EVP_AES_GCM_CTX; 85 86typedef struct { 87 AES_KEY ks1, ks2; /* AES key schedules to use */ 88 XTS128_CONTEXT xts; 89 void (*stream) (const unsigned char *in, 90 unsigned char *out, size_t length, 91 const AES_KEY *key1, const AES_KEY *key2, 92 const unsigned char iv[16]); 93} EVP_AES_XTS_CTX; 94 95typedef 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 109int vpaes_set_encrypt_key(const unsigned char *userKey, int bits, 110 AES_KEY *key); 111int vpaes_set_decrypt_key(const unsigned char *userKey, int bits, 112 AES_KEY *key); 113 114void vpaes_encrypt(const unsigned char *in, unsigned char *out, 115 const AES_KEY *key); 116void vpaes_decrypt(const unsigned char *in, unsigned char *out, 117 const AES_KEY *key); 118 119void vpaes_cbc_encrypt(const unsigned char *in, 120 unsigned char *out, 121 size_t length, 122 const AES_KEY *key, unsigned char *ivec, int enc); 123# endif 124# ifdef BSAES_ASM 125void bsaes_cbc_encrypt(const unsigned char *in, unsigned char *out, 126 size_t length, const AES_KEY *key, 127 unsigned char ivec[16], int enc); 128void bsaes_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out, 129 size_t len, const AES_KEY *key, 130 const unsigned char ivec[16]); 131void bsaes_xts_encrypt(const unsigned char *inp, unsigned char *out, 132 size_t len, const AES_KEY *key1, 133 const AES_KEY *key2, const unsigned char iv[16]); 134void bsaes_xts_decrypt(const unsigned char *inp, unsigned char *out, 135 size_t len, const AES_KEY *key1, 136 const AES_KEY *key2, const unsigned char iv[16]); 137# endif 138# ifdef AES_CTR_ASM 139void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out, 140 size_t blocks, const AES_KEY *key, 141 const unsigned char ivec[AES_BLOCK_SIZE]); 142# endif 143# ifdef AES_XTS_ASM 144void AES_xts_encrypt(const char *inp, char *out, size_t len, 145 const AES_KEY *key1, const AES_KEY *key2, 146 const unsigned char iv[16]); 147void AES_xts_decrypt(const char *inp, char *out, size_t len, 148 const AES_KEY *key1, const AES_KEY *key2, 149 const unsigned char iv[16]); 150# endif 151 152# if defined(AES_ASM) && !defined(I386_ONLY) && ( \ 153 ((defined(__i386) || defined(__i386__) || \ 154 defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \ 155 defined(__x86_64) || defined(__x86_64__) || \ 156 defined(_M_AMD64) || defined(_M_X64) || \ 157 defined(__INTEL__) ) 158 159extern unsigned int OPENSSL_ia32cap_P[2]; 160 161# ifdef VPAES_ASM 162# define VPAES_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(41-32))) 163# endif 164# ifdef BSAES_ASM 165# define BSAES_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(41-32))) 166# endif 167/* 168 * AES-NI section 169 */ 170# define AESNI_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(57-32))) 171 172int aesni_set_encrypt_key(const unsigned char *userKey, int bits, 173 AES_KEY *key); 174int aesni_set_decrypt_key(const unsigned char *userKey, int bits, 175 AES_KEY *key); 176 177void aesni_encrypt(const unsigned char *in, unsigned char *out, 178 const AES_KEY *key); 179void aesni_decrypt(const unsigned char *in, unsigned char *out, 180 const AES_KEY *key); 181 182void aesni_ecb_encrypt(const unsigned char *in, 183 unsigned char *out, 184 size_t length, const AES_KEY *key, int enc); 185void aesni_cbc_encrypt(const unsigned char *in, 186 unsigned char *out, 187 size_t length, 188 const AES_KEY *key, unsigned char *ivec, int enc); 189 190void aesni_ctr32_encrypt_blocks(const unsigned char *in, 191 unsigned char *out, 192 size_t blocks, 193 const void *key, const unsigned char *ivec); 194 195void aesni_xts_encrypt(const unsigned char *in, 196 unsigned char *out, 197 size_t length, 198 const AES_KEY *key1, const AES_KEY *key2, 199 const unsigned char iv[16]); 200 201void aesni_xts_decrypt(const unsigned char *in, 202 unsigned char *out, 203 size_t length, 204 const AES_KEY *key1, const AES_KEY *key2, 205 const unsigned char iv[16]); 206 207void aesni_ccm64_encrypt_blocks(const unsigned char *in, 208 unsigned char *out, 209 size_t blocks, 210 const void *key, 211 const unsigned char ivec[16], 212 unsigned char cmac[16]); 213 214void aesni_ccm64_decrypt_blocks(const unsigned char *in, 215 unsigned char *out, 216 size_t blocks, 217 const void *key, 218 const unsigned char ivec[16], 219 unsigned char cmac[16]); 220 221static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 222 const unsigned char *iv, int enc) 223{ 224 int ret, mode; 225 EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; 226 227 mode = ctx->cipher->flags & EVP_CIPH_MODE; 228 if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) 229 && !enc) { 230 ret = aesni_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data); 231 dat->block = (block128_f) aesni_decrypt; 232 dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? 233 (cbc128_f) aesni_cbc_encrypt : NULL; 234 } else { 235 ret = aesni_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data); 236 dat->block = (block128_f) aesni_encrypt; 237 if (mode == EVP_CIPH_CBC_MODE) 238 dat->stream.cbc = (cbc128_f) aesni_cbc_encrypt; 239 else if (mode == EVP_CIPH_CTR_MODE) 240 dat->stream.ctr = (ctr128_f) aesni_ctr32_encrypt_blocks; 241 else 242 dat->stream.cbc = NULL; 243 } 244 245 if (ret < 0) { 246 EVPerr(EVP_F_AESNI_INIT_KEY, EVP_R_AES_KEY_SETUP_FAILED); 247 return 0; 248 } 249 250 return 1; 251} 252 253static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 254 const unsigned char *in, size_t len) 255{ 256 aesni_cbc_encrypt(in, out, len, ctx->cipher_data, ctx->iv, ctx->encrypt); 257 258 return 1; 259} 260 261static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 262 const unsigned char *in, size_t len) 263{ 264 size_t bl = ctx->cipher->block_size; 265 266 if (len < bl) 267 return 1; 268 269 aesni_ecb_encrypt(in, out, len, ctx->cipher_data, ctx->encrypt); 270 271 return 1; 272} 273 274# define aesni_ofb_cipher aes_ofb_cipher 275static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 276 const unsigned char *in, size_t len); 277 278# define aesni_cfb_cipher aes_cfb_cipher 279static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 280 const unsigned char *in, size_t len); 281 282# define aesni_cfb8_cipher aes_cfb8_cipher 283static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 284 const unsigned char *in, size_t len); 285 286# define aesni_cfb1_cipher aes_cfb1_cipher 287static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 288 const unsigned char *in, size_t len); 289 290# define aesni_ctr_cipher aes_ctr_cipher 291static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 292 const unsigned char *in, size_t len); 293 294static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 295 const unsigned char *iv, int enc) 296{ 297 EVP_AES_GCM_CTX *gctx = ctx->cipher_data; 298 if (!iv && !key) 299 return 1; 300 if (key) { 301 aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); 302 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f) aesni_encrypt); 303 gctx->ctr = (ctr128_f) aesni_ctr32_encrypt_blocks; 304 /* 305 * If we have an iv can set it directly, otherwise use saved IV. 306 */ 307 if (iv == NULL && gctx->iv_set) 308 iv = gctx->iv; 309 if (iv) { 310 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); 311 gctx->iv_set = 1; 312 } 313 gctx->key_set = 1; 314 } else { 315 /* If key set use IV, otherwise copy */ 316 if (gctx->key_set) 317 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); 318 else 319 memcpy(gctx->iv, iv, gctx->ivlen); 320 gctx->iv_set = 1; 321 gctx->iv_gen = 0; 322 } 323 return 1; 324} 325 326# define aesni_gcm_cipher aes_gcm_cipher 327static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 328 const unsigned char *in, size_t len); 329 330static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 331 const unsigned char *iv, int enc) 332{ 333 EVP_AES_XTS_CTX *xctx = ctx->cipher_data; 334 if (!iv && !key) 335 return 1; 336 337 if (key) { 338 /* key_len is two AES keys */ 339 if (enc) { 340 aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); 341 xctx->xts.block1 = (block128_f) aesni_encrypt; 342 xctx->stream = aesni_xts_encrypt; 343 } else { 344 aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); 345 xctx->xts.block1 = (block128_f) aesni_decrypt; 346 xctx->stream = aesni_xts_decrypt; 347 } 348 349 aesni_set_encrypt_key(key + ctx->key_len / 2, 350 ctx->key_len * 4, &xctx->ks2); 351 xctx->xts.block2 = (block128_f) aesni_encrypt; 352 353 xctx->xts.key1 = &xctx->ks1; 354 } 355 356 if (iv) { 357 xctx->xts.key2 = &xctx->ks2; 358 memcpy(ctx->iv, iv, 16); 359 } 360 361 return 1; 362} 363 364# define aesni_xts_cipher aes_xts_cipher 365static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 366 const unsigned char *in, size_t len); 367 368static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 369 const unsigned char *iv, int enc) 370{ 371 EVP_AES_CCM_CTX *cctx = ctx->cipher_data; 372 if (!iv && !key) 373 return 1; 374 if (key) { 375 aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); 376 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, 377 &cctx->ks, (block128_f) aesni_encrypt); 378 cctx->str = enc ? (ccm128_f) aesni_ccm64_encrypt_blocks : 379 (ccm128_f) aesni_ccm64_decrypt_blocks; 380 cctx->key_set = 1; 381 } 382 if (iv) { 383 memcpy(ctx->iv, iv, 15 - cctx->L); 384 cctx->iv_set = 1; 385 } 386 return 1; 387} 388 389# define aesni_ccm_cipher aes_ccm_cipher 390static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 391 const unsigned char *in, size_t len); 392 393# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ 394static const EVP_CIPHER aesni_##keylen##_##mode = { \ 395 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ 396 flags|EVP_CIPH_##MODE##_MODE, \ 397 aesni_init_key, \ 398 aesni_##mode##_cipher, \ 399 NULL, \ 400 sizeof(EVP_AES_KEY), \ 401 NULL,NULL,NULL,NULL }; \ 402static const EVP_CIPHER aes_##keylen##_##mode = { \ 403 nid##_##keylen##_##nmode,blocksize, \ 404 keylen/8,ivlen, \ 405 flags|EVP_CIPH_##MODE##_MODE, \ 406 aes_init_key, \ 407 aes_##mode##_cipher, \ 408 NULL, \ 409 sizeof(EVP_AES_KEY), \ 410 NULL,NULL,NULL,NULL }; \ 411const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ 412{ return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; } 413 414# define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ 415static const EVP_CIPHER aesni_##keylen##_##mode = { \ 416 nid##_##keylen##_##mode,blocksize, \ 417 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ 418 flags|EVP_CIPH_##MODE##_MODE, \ 419 aesni_##mode##_init_key, \ 420 aesni_##mode##_cipher, \ 421 aes_##mode##_cleanup, \ 422 sizeof(EVP_AES_##MODE##_CTX), \ 423 NULL,NULL,aes_##mode##_ctrl,NULL }; \ 424static const EVP_CIPHER aes_##keylen##_##mode = { \ 425 nid##_##keylen##_##mode,blocksize, \ 426 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ 427 flags|EVP_CIPH_##MODE##_MODE, \ 428 aes_##mode##_init_key, \ 429 aes_##mode##_cipher, \ 430 aes_##mode##_cleanup, \ 431 sizeof(EVP_AES_##MODE##_CTX), \ 432 NULL,NULL,aes_##mode##_ctrl,NULL }; \ 433const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ 434{ return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; } 435 436# else 437 438# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ 439static const EVP_CIPHER aes_##keylen##_##mode = { \ 440 nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ 441 flags|EVP_CIPH_##MODE##_MODE, \ 442 aes_init_key, \ 443 aes_##mode##_cipher, \ 444 NULL, \ 445 sizeof(EVP_AES_KEY), \ 446 NULL,NULL,NULL,NULL }; \ 447const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ 448{ return &aes_##keylen##_##mode; } 449 450# define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ 451static const EVP_CIPHER aes_##keylen##_##mode = { \ 452 nid##_##keylen##_##mode,blocksize, \ 453 (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ 454 flags|EVP_CIPH_##MODE##_MODE, \ 455 aes_##mode##_init_key, \ 456 aes_##mode##_cipher, \ 457 aes_##mode##_cleanup, \ 458 sizeof(EVP_AES_##MODE##_CTX), \ 459 NULL,NULL,aes_##mode##_ctrl,NULL }; \ 460const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ 461{ return &aes_##keylen##_##mode; } 462# endif 463 464# define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \ 465 BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ 466 BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ 467 BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ 468 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ 469 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \ 470 BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \ 471 BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags) 472 473static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 474 const unsigned char *iv, int enc) 475{ 476 int ret, mode; 477 EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; 478 479 mode = ctx->cipher->flags & EVP_CIPH_MODE; 480 if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) 481 && !enc) 482# ifdef BSAES_CAPABLE 483 if (BSAES_CAPABLE && mode == EVP_CIPH_CBC_MODE) { 484 ret = AES_set_decrypt_key(key, ctx->key_len * 8, &dat->ks); 485 dat->block = (block128_f) AES_decrypt; 486 dat->stream.cbc = (cbc128_f) bsaes_cbc_encrypt; 487 } else 488# endif 489# ifdef VPAES_CAPABLE 490 if (VPAES_CAPABLE) { 491 ret = vpaes_set_decrypt_key(key, ctx->key_len * 8, &dat->ks); 492 dat->block = (block128_f) vpaes_decrypt; 493 dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? 494 (cbc128_f) vpaes_cbc_encrypt : NULL; 495 } else 496# endif 497 { 498 ret = AES_set_decrypt_key(key, ctx->key_len * 8, &dat->ks); 499 dat->block = (block128_f) AES_decrypt; 500 dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? 501 (cbc128_f) AES_cbc_encrypt : NULL; 502 } else 503# ifdef BSAES_CAPABLE 504 if (BSAES_CAPABLE && mode == EVP_CIPH_CTR_MODE) { 505 ret = AES_set_encrypt_key(key, ctx->key_len * 8, &dat->ks); 506 dat->block = (block128_f) AES_encrypt; 507 dat->stream.ctr = (ctr128_f) bsaes_ctr32_encrypt_blocks; 508 } else 509# endif 510# ifdef VPAES_CAPABLE 511 if (VPAES_CAPABLE) { 512 ret = vpaes_set_encrypt_key(key, ctx->key_len * 8, &dat->ks); 513 dat->block = (block128_f) vpaes_encrypt; 514 dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? 515 (cbc128_f) vpaes_cbc_encrypt : NULL; 516 } else 517# endif 518 { 519 ret = AES_set_encrypt_key(key, ctx->key_len * 8, &dat->ks); 520 dat->block = (block128_f) AES_encrypt; 521 dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? 522 (cbc128_f) AES_cbc_encrypt : NULL; 523# ifdef AES_CTR_ASM 524 if (mode == EVP_CIPH_CTR_MODE) 525 dat->stream.ctr = (ctr128_f) AES_ctr32_encrypt; 526# endif 527 } 528 529 if (ret < 0) { 530 EVPerr(EVP_F_AES_INIT_KEY, EVP_R_AES_KEY_SETUP_FAILED); 531 return 0; 532 } 533 534 return 1; 535} 536 537static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 538 const unsigned char *in, size_t len) 539{ 540 EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; 541 542 if (dat->stream.cbc) 543 (*dat->stream.cbc) (in, out, len, &dat->ks, ctx->iv, ctx->encrypt); 544 else if (ctx->encrypt) 545 CRYPTO_cbc128_encrypt(in, out, len, &dat->ks, ctx->iv, dat->block); 546 else 547 CRYPTO_cbc128_encrypt(in, out, len, &dat->ks, ctx->iv, dat->block); 548 549 return 1; 550} 551 552static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 553 const unsigned char *in, size_t len) 554{ 555 size_t bl = ctx->cipher->block_size; 556 size_t i; 557 EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; 558 559 if (len < bl) 560 return 1; 561 562 for (i = 0, len -= bl; i <= len; i += bl) 563 (*dat->block) (in + i, out + i, &dat->ks); 564 565 return 1; 566} 567 568static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 569 const unsigned char *in, size_t len) 570{ 571 EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; 572 573 CRYPTO_ofb128_encrypt(in, out, len, &dat->ks, 574 ctx->iv, &ctx->num, dat->block); 575 return 1; 576} 577 578static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 579 const unsigned char *in, size_t len) 580{ 581 EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; 582 583 CRYPTO_cfb128_encrypt(in, out, len, &dat->ks, 584 ctx->iv, &ctx->num, ctx->encrypt, dat->block); 585 return 1; 586} 587 588static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 589 const unsigned char *in, size_t len) 590{ 591 EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; 592 593 CRYPTO_cfb128_8_encrypt(in, out, len, &dat->ks, 594 ctx->iv, &ctx->num, ctx->encrypt, dat->block); 595 return 1; 596} 597 598static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 599 const unsigned char *in, size_t len) 600{ 601 EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; 602 603 if (ctx->flags & EVP_CIPH_FLAG_LENGTH_BITS) { 604 CRYPTO_cfb128_1_encrypt(in, out, len, &dat->ks, 605 ctx->iv, &ctx->num, ctx->encrypt, dat->block); 606 return 1; 607 } 608 609 while (len >= MAXBITCHUNK) { 610 CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, &dat->ks, 611 ctx->iv, &ctx->num, ctx->encrypt, dat->block); 612 len -= MAXBITCHUNK; 613 } 614 if (len) 615 CRYPTO_cfb128_1_encrypt(in, out, len * 8, &dat->ks, 616 ctx->iv, &ctx->num, ctx->encrypt, dat->block); 617 618 return 1; 619} 620 621static int aes_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 622 const unsigned char *in, size_t len) 623{ 624 unsigned int num = ctx->num; 625 EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; 626 627 if (dat->stream.ctr) 628 CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks, 629 ctx->iv, ctx->buf, &num, dat->stream.ctr); 630 else 631 CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, 632 ctx->iv, ctx->buf, &num, dat->block); 633 ctx->num = (size_t)num; 634 return 1; 635} 636 637BLOCK_CIPHER_generic_pack(NID_aes, 128, EVP_CIPH_FLAG_FIPS) 638 BLOCK_CIPHER_generic_pack(NID_aes, 192, EVP_CIPH_FLAG_FIPS) 639 BLOCK_CIPHER_generic_pack(NID_aes, 256, EVP_CIPH_FLAG_FIPS) 640 641static int aes_gcm_cleanup(EVP_CIPHER_CTX *c) 642{ 643 EVP_AES_GCM_CTX *gctx = c->cipher_data; 644 OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm)); 645 if (gctx->iv != c->iv) 646 OPENSSL_free(gctx->iv); 647 return 1; 648} 649 650/* increment counter (64-bit int) by 1 */ 651static void ctr64_inc(unsigned char *counter) 652{ 653 int n = 8; 654 unsigned char c; 655 656 do { 657 --n; 658 c = counter[n]; 659 ++c; 660 counter[n] = c; 661 if (c) 662 return; 663 } while (n); 664} 665 666static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 667{ 668 EVP_AES_GCM_CTX *gctx = c->cipher_data; 669 switch (type) { 670 case EVP_CTRL_INIT: 671 gctx->key_set = 0; 672 gctx->iv_set = 0; 673 gctx->ivlen = c->cipher->iv_len; 674 gctx->iv = c->iv; 675 gctx->taglen = -1; 676 gctx->iv_gen = 0; 677 gctx->tls_aad_len = -1; 678 return 1; 679 680 case EVP_CTRL_GCM_SET_IVLEN: 681 if (arg <= 0) 682 return 0; 683# ifdef OPENSSL_FIPS 684 if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) 685 && arg < 12) 686 return 0; 687# endif 688 /* Allocate memory for IV if needed */ 689 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) { 690 if (gctx->iv != c->iv) 691 OPENSSL_free(gctx->iv); 692 gctx->iv = OPENSSL_malloc(arg); 693 if (!gctx->iv) 694 return 0; 695 } 696 gctx->ivlen = arg; 697 return 1; 698 699 case EVP_CTRL_GCM_SET_TAG: 700 if (arg <= 0 || arg > 16 || c->encrypt) 701 return 0; 702 memcpy(c->buf, ptr, arg); 703 gctx->taglen = arg; 704 return 1; 705 706 case EVP_CTRL_GCM_GET_TAG: 707 if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0) 708 return 0; 709 memcpy(ptr, c->buf, arg); 710 return 1; 711 712 case EVP_CTRL_GCM_SET_IV_FIXED: 713 /* Special case: -1 length restores whole IV */ 714 if (arg == -1) { 715 memcpy(gctx->iv, ptr, gctx->ivlen); 716 gctx->iv_gen = 1; 717 return 1; 718 } 719 /* 720 * Fixed field must be at least 4 bytes and invocation field at least 721 * 8. 722 */ 723 if ((arg < 4) || (gctx->ivlen - arg) < 8) 724 return 0; 725 if (arg) 726 memcpy(gctx->iv, ptr, arg); 727 if (c->encrypt && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) 728 return 0; 729 gctx->iv_gen = 1; 730 return 1; 731 732 case EVP_CTRL_GCM_IV_GEN: 733 if (gctx->iv_gen == 0 || gctx->key_set == 0) 734 return 0; 735 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); 736 if (arg <= 0 || arg > gctx->ivlen) 737 arg = gctx->ivlen; 738 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg); 739 /* 740 * Invocation field will be at least 8 bytes in size and so no need 741 * to check wrap around or increment more than last 8 bytes. 742 */ 743 ctr64_inc(gctx->iv + gctx->ivlen - 8); 744 gctx->iv_set = 1; 745 return 1; 746 747 case EVP_CTRL_GCM_SET_IV_INV: 748 if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt) 749 return 0; 750 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); 751 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); 752 gctx->iv_set = 1; 753 return 1; 754 755 case EVP_CTRL_AEAD_TLS1_AAD: 756 /* Save the AAD for later use */ 757 if (arg != EVP_AEAD_TLS1_AAD_LEN) 758 return 0; 759 memcpy(c->buf, ptr, arg); 760 gctx->tls_aad_len = arg; 761 { 762 unsigned int len = c->buf[arg - 2] << 8 | c->buf[arg - 1]; 763 /* Correct length for explicit IV */ 764 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; 765 /* If decrypting correct for tag too */ 766 if (!c->encrypt) 767 len -= EVP_GCM_TLS_TAG_LEN; 768 c->buf[arg - 2] = len >> 8; 769 c->buf[arg - 1] = len & 0xff; 770 } 771 /* Extra padding: tag appended to record */ 772 return EVP_GCM_TLS_TAG_LEN; 773 774 case EVP_CTRL_COPY: 775 { 776 EVP_CIPHER_CTX *out = ptr; 777 EVP_AES_GCM_CTX *gctx_out = out->cipher_data; 778 if (gctx->gcm.key) { 779 if (gctx->gcm.key != &gctx->ks) 780 return 0; 781 gctx_out->gcm.key = &gctx_out->ks; 782 } 783 if (gctx->iv == c->iv) 784 gctx_out->iv = out->iv; 785 else { 786 gctx_out->iv = OPENSSL_malloc(gctx->ivlen); 787 if (!gctx_out->iv) 788 return 0; 789 memcpy(gctx_out->iv, gctx->iv, gctx->ivlen); 790 } 791 return 1; 792 } 793 794 default: 795 return -1; 796 797 } 798} 799 800static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 801 const unsigned char *iv, int enc) 802{ 803 EVP_AES_GCM_CTX *gctx = ctx->cipher_data; 804 if (!iv && !key) 805 return 1; 806 if (key) { 807 do { 808# ifdef BSAES_CAPABLE 809 if (BSAES_CAPABLE) { 810 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); 811 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, 812 (block128_f) AES_encrypt); 813 gctx->ctr = (ctr128_f) bsaes_ctr32_encrypt_blocks; 814 break; 815 } else 816# endif 817# ifdef VPAES_CAPABLE 818 if (VPAES_CAPABLE) { 819 vpaes_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); 820 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, 821 (block128_f) vpaes_encrypt); 822 gctx->ctr = NULL; 823 break; 824 } else 825# endif 826 (void)0; /* terminate potentially open 'else' */ 827 828 AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); 829 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, 830 (block128_f) AES_encrypt); 831# ifdef AES_CTR_ASM 832 gctx->ctr = (ctr128_f) AES_ctr32_encrypt; 833# else 834 gctx->ctr = NULL; 835# endif 836 } while (0); 837 838 /* 839 * If we have an iv can set it directly, otherwise use saved IV. 840 */ 841 if (iv == NULL && gctx->iv_set) 842 iv = gctx->iv; 843 if (iv) { 844 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); 845 gctx->iv_set = 1; 846 } 847 gctx->key_set = 1; 848 } else { 849 /* If key set use IV, otherwise copy */ 850 if (gctx->key_set) 851 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); 852 else 853 memcpy(gctx->iv, iv, gctx->ivlen); 854 gctx->iv_set = 1; 855 gctx->iv_gen = 0; 856 } 857 return 1; 858} 859 860/* 861 * Handle TLS GCM packet format. This consists of the last portion of the IV 862 * followed by the payload and finally the tag. On encrypt generate IV, 863 * encrypt payload and write the tag. On verify retrieve IV, decrypt payload 864 * and verify tag. 865 */ 866 867static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 868 const unsigned char *in, size_t len) 869{ 870 EVP_AES_GCM_CTX *gctx = ctx->cipher_data; 871 int rv = -1; 872 /* Encrypt/decrypt must be performed in place */ 873 if (out != in 874 || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN)) 875 return -1; 876 /* 877 * Set IV from start of buffer or generate IV and write to start of 878 * buffer. 879 */ 880 if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ? 881 EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV, 882 EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) 883 goto err; 884 /* Use saved AAD */ 885 if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len)) 886 goto err; 887 /* Fix buffer and length to point to payload */ 888 in += EVP_GCM_TLS_EXPLICIT_IV_LEN; 889 out += EVP_GCM_TLS_EXPLICIT_IV_LEN; 890 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; 891 if (ctx->encrypt) { 892 /* Encrypt payload */ 893 if (gctx->ctr) { 894 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, 895 in, out, len, gctx->ctr)) 896 goto err; 897 } else { 898 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) 899 goto err; 900 } 901 out += len; 902 /* Finally write tag */ 903 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN); 904 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; 905 } else { 906 /* Decrypt */ 907 if (gctx->ctr) { 908 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, 909 in, out, len, gctx->ctr)) 910 goto err; 911 } else { 912 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) 913 goto err; 914 } 915 /* Retrieve tag */ 916 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, EVP_GCM_TLS_TAG_LEN); 917 /* If tag mismatch wipe buffer */ 918 if (CRYPTO_memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) { 919 OPENSSL_cleanse(out, len); 920 goto err; 921 } 922 rv = len; 923 } 924 925 err: 926 gctx->iv_set = 0; 927 gctx->tls_aad_len = -1; 928 return rv; 929} 930 931static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 932 const unsigned char *in, size_t len) 933{ 934 EVP_AES_GCM_CTX *gctx = ctx->cipher_data; 935 /* If not set up, return error */ 936 if (!gctx->key_set) 937 return -1; 938 939 if (gctx->tls_aad_len >= 0) 940 return aes_gcm_tls_cipher(ctx, out, in, len); 941 942 if (!gctx->iv_set) 943 return -1; 944 if (in) { 945 if (out == NULL) { 946 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len)) 947 return -1; 948 } else if (ctx->encrypt) { 949 if (gctx->ctr) { 950 if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, 951 in, out, len, gctx->ctr)) 952 return -1; 953 } else { 954 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) 955 return -1; 956 } 957 } else { 958 if (gctx->ctr) { 959 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, 960 in, out, len, gctx->ctr)) 961 return -1; 962 } else { 963 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) 964 return -1; 965 } 966 } 967 return len; 968 } else { 969 if (!ctx->encrypt) { 970 if (gctx->taglen < 0) 971 return -1; 972 if (CRYPTO_gcm128_finish(&gctx->gcm, ctx->buf, gctx->taglen) != 0) 973 return -1; 974 gctx->iv_set = 0; 975 return 0; 976 } 977 CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16); 978 gctx->taglen = 16; 979 /* Don't reuse the IV */ 980 gctx->iv_set = 0; 981 return 0; 982 } 983 984} 985 986# define CUSTOM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ 987 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ 988 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ 989 | EVP_CIPH_CUSTOM_COPY) 990 991BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, gcm, GCM, 992 EVP_CIPH_FLAG_FIPS | EVP_CIPH_FLAG_AEAD_CIPHER | 993 CUSTOM_FLAGS) 994 BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, gcm, GCM, 995 EVP_CIPH_FLAG_FIPS | EVP_CIPH_FLAG_AEAD_CIPHER | 996 CUSTOM_FLAGS) 997 BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, gcm, GCM, 998 EVP_CIPH_FLAG_FIPS | EVP_CIPH_FLAG_AEAD_CIPHER | 999 CUSTOM_FLAGS) 1000 1001static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 1002{ 1003 EVP_AES_XTS_CTX *xctx = c->cipher_data; 1004 if (type == EVP_CTRL_COPY) { 1005 EVP_CIPHER_CTX *out = ptr; 1006 EVP_AES_XTS_CTX *xctx_out = out->cipher_data; 1007 if (xctx->xts.key1) { 1008 if (xctx->xts.key1 != &xctx->ks1) 1009 return 0; 1010 xctx_out->xts.key1 = &xctx_out->ks1; 1011 } 1012 if (xctx->xts.key2) { 1013 if (xctx->xts.key2 != &xctx->ks2) 1014 return 0; 1015 xctx_out->xts.key2 = &xctx_out->ks2; 1016 } 1017 return 1; 1018 } else if (type != EVP_CTRL_INIT) 1019 return -1; 1020 /* key1 and key2 are used as an indicator both key and IV are set */ 1021 xctx->xts.key1 = NULL; 1022 xctx->xts.key2 = NULL; 1023 return 1; 1024} 1025 1026static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 1027 const unsigned char *iv, int enc) 1028{ 1029 EVP_AES_XTS_CTX *xctx = ctx->cipher_data; 1030 if (!iv && !key) 1031 return 1; 1032 1033 if (key) 1034 do { 1035# ifdef AES_XTS_ASM 1036 xctx->stream = enc ? AES_xts_encrypt : AES_xts_decrypt; 1037# else 1038 xctx->stream = NULL; 1039# endif 1040 /* key_len is two AES keys */ 1041# ifdef BSAES_CAPABLE 1042 if (BSAES_CAPABLE) 1043 xctx->stream = enc ? bsaes_xts_encrypt : bsaes_xts_decrypt; 1044 else 1045# endif 1046# ifdef VPAES_CAPABLE 1047 if (VPAES_CAPABLE) { 1048 if (enc) { 1049 vpaes_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); 1050 xctx->xts.block1 = (block128_f) vpaes_encrypt; 1051 } else { 1052 vpaes_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); 1053 xctx->xts.block1 = (block128_f) vpaes_decrypt; 1054 } 1055 1056 vpaes_set_encrypt_key(key + ctx->key_len / 2, 1057 ctx->key_len * 4, &xctx->ks2); 1058 xctx->xts.block2 = (block128_f) vpaes_encrypt; 1059 1060 xctx->xts.key1 = &xctx->ks1; 1061 break; 1062 } else 1063# endif 1064 (void)0; /* terminate potentially open 'else' */ 1065 1066 if (enc) { 1067 AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); 1068 xctx->xts.block1 = (block128_f) AES_encrypt; 1069 } else { 1070 AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); 1071 xctx->xts.block1 = (block128_f) AES_decrypt; 1072 } 1073 1074 AES_set_encrypt_key(key + ctx->key_len / 2, 1075 ctx->key_len * 4, &xctx->ks2); 1076 xctx->xts.block2 = (block128_f) AES_encrypt; 1077 1078 xctx->xts.key1 = &xctx->ks1; 1079 } while (0); 1080 1081 if (iv) { 1082 xctx->xts.key2 = &xctx->ks2; 1083 memcpy(ctx->iv, iv, 16); 1084 } 1085 1086 return 1; 1087} 1088 1089static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 1090 const unsigned char *in, size_t len) 1091{ 1092 EVP_AES_XTS_CTX *xctx = ctx->cipher_data; 1093 if (!xctx->xts.key1 || !xctx->xts.key2) 1094 return 0; 1095 if (!out || !in || len < AES_BLOCK_SIZE) 1096 return 0; 1097# ifdef OPENSSL_FIPS 1098 /* Requirement of SP800-38E */ 1099 if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) && 1100 (len > (1UL << 20) * 16)) { 1101 EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE); 1102 return 0; 1103 } 1104# endif 1105 if (xctx->stream) 1106 (*xctx->stream) (in, out, len, 1107 xctx->xts.key1, xctx->xts.key2, ctx->iv); 1108 else if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len, 1109 ctx->encrypt)) 1110 return 0; 1111 return 1; 1112} 1113 1114# define aes_xts_cleanup NULL 1115 1116# define XTS_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV \ 1117 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ 1118 | EVP_CIPH_CUSTOM_COPY) 1119 1120BLOCK_CIPHER_custom(NID_aes, 128, 1, 16, xts, XTS, 1121 EVP_CIPH_FLAG_FIPS | XTS_FLAGS) 1122 BLOCK_CIPHER_custom(NID_aes, 256, 1, 16, xts, XTS, 1123 EVP_CIPH_FLAG_FIPS | XTS_FLAGS) 1124 1125static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 1126{ 1127 EVP_AES_CCM_CTX *cctx = c->cipher_data; 1128 switch (type) { 1129 case EVP_CTRL_INIT: 1130 cctx->key_set = 0; 1131 cctx->iv_set = 0; 1132 cctx->L = 8; 1133 cctx->M = 12; 1134 cctx->tag_set = 0; 1135 cctx->len_set = 0; 1136 return 1; 1137 1138 case EVP_CTRL_CCM_SET_IVLEN: 1139 arg = 15 - arg; 1140 case EVP_CTRL_CCM_SET_L: 1141 if (arg < 2 || arg > 8) 1142 return 0; 1143 cctx->L = arg; 1144 return 1; 1145 1146 case EVP_CTRL_CCM_SET_TAG: 1147 if ((arg & 1) || arg < 4 || arg > 16) 1148 return 0; 1149 if (c->encrypt && ptr) 1150 return 0; 1151 if (ptr) { 1152 cctx->tag_set = 1; 1153 memcpy(c->buf, ptr, arg); 1154 } 1155 cctx->M = arg; 1156 return 1; 1157 1158 case EVP_CTRL_CCM_GET_TAG: 1159 if (!c->encrypt || !cctx->tag_set) 1160 return 0; 1161 if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg)) 1162 return 0; 1163 cctx->tag_set = 0; 1164 cctx->iv_set = 0; 1165 cctx->len_set = 0; 1166 return 1; 1167 1168 case EVP_CTRL_COPY: 1169 { 1170 EVP_CIPHER_CTX *out = ptr; 1171 EVP_AES_CCM_CTX *cctx_out = out->cipher_data; 1172 if (cctx->ccm.key) { 1173 if (cctx->ccm.key != &cctx->ks) 1174 return 0; 1175 cctx_out->ccm.key = &cctx_out->ks; 1176 } 1177 return 1; 1178 } 1179 1180 default: 1181 return -1; 1182 1183 } 1184} 1185 1186static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 1187 const unsigned char *iv, int enc) 1188{ 1189 EVP_AES_CCM_CTX *cctx = ctx->cipher_data; 1190 if (!iv && !key) 1191 return 1; 1192 if (key) 1193 do { 1194# ifdef VPAES_CAPABLE 1195 if (VPAES_CAPABLE) { 1196 vpaes_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); 1197 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, 1198 &cctx->ks, (block128_f) vpaes_encrypt); 1199 cctx->str = NULL; 1200 cctx->key_set = 1; 1201 break; 1202 } 1203# endif 1204 AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); 1205 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, 1206 &cctx->ks, (block128_f) AES_encrypt); 1207 cctx->str = NULL; 1208 cctx->key_set = 1; 1209 } while (0); 1210 if (iv) { 1211 memcpy(ctx->iv, iv, 15 - cctx->L); 1212 cctx->iv_set = 1; 1213 } 1214 return 1; 1215} 1216 1217static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 1218 const unsigned char *in, size_t len) 1219{ 1220 EVP_AES_CCM_CTX *cctx = ctx->cipher_data; 1221 CCM128_CONTEXT *ccm = &cctx->ccm; 1222 /* If not set up, return error */ 1223 if (!cctx->iv_set && !cctx->key_set) 1224 return -1; 1225 if (!ctx->encrypt && !cctx->tag_set) 1226 return -1; 1227 if (!out) { 1228 if (!in) { 1229 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) 1230 return -1; 1231 cctx->len_set = 1; 1232 return len; 1233 } 1234 /* If have AAD need message length */ 1235 if (!cctx->len_set && len) 1236 return -1; 1237 CRYPTO_ccm128_aad(ccm, in, len); 1238 return len; 1239 } 1240 /* EVP_*Final() doesn't return any data */ 1241 if (!in) 1242 return 0; 1243 /* If not set length yet do it */ 1244 if (!cctx->len_set) { 1245 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) 1246 return -1; 1247 cctx->len_set = 1; 1248 } 1249 if (ctx->encrypt) { 1250 if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, 1251 cctx->str) : 1252 CRYPTO_ccm128_encrypt(ccm, in, out, len)) 1253 return -1; 1254 cctx->tag_set = 1; 1255 return len; 1256 } else { 1257 int rv = -1; 1258 if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, 1259 cctx->str) : 1260 !CRYPTO_ccm128_decrypt(ccm, in, out, len)) { 1261 unsigned char tag[16]; 1262 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { 1263 if (!CRYPTO_memcmp(tag, ctx->buf, cctx->M)) 1264 rv = len; 1265 } 1266 } 1267 if (rv == -1) 1268 OPENSSL_cleanse(out, len); 1269 cctx->iv_set = 0; 1270 cctx->tag_set = 0; 1271 cctx->len_set = 0; 1272 return rv; 1273 } 1274 1275} 1276 1277# define aes_ccm_cleanup NULL 1278 1279BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, ccm, CCM, 1280 EVP_CIPH_FLAG_FIPS | CUSTOM_FLAGS) 1281 BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, ccm, CCM, 1282 EVP_CIPH_FLAG_FIPS | CUSTOM_FLAGS) 1283 BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, ccm, CCM, 1284 EVP_CIPH_FLAG_FIPS | CUSTOM_FLAGS) 1285# endif 1286#endif 1287