Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame^] | 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/evp.h> |
| 54 | #include <openssl/err.h> |
| 55 | #include <string.h> |
| 56 | #include <assert.h> |
| 57 | #include <openssl/aes.h> |
| 58 | #include "evp_locl.h" |
| 59 | #ifndef OPENSSL_FIPS |
| 60 | #include "modes_lcl.h" |
| 61 | #include <openssl/rand.h> |
| 62 | |
| 63 | typedef struct |
| 64 | { |
| 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 | |
| 73 | typedef struct |
| 74 | { |
| 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 | { |
| 89 | AES_KEY ks1, ks2; /* AES key schedules to use */ |
| 90 | XTS128_CONTEXT xts; |
| 91 | void (*stream)(const unsigned char *in, |
| 92 | unsigned char *out, size_t length, |
| 93 | const AES_KEY *key1, const AES_KEY *key2, |
| 94 | const unsigned char iv[16]); |
| 95 | } EVP_AES_XTS_CTX; |
| 96 | |
| 97 | typedef struct |
| 98 | { |
| 99 | AES_KEY ks; /* AES key schedule to use */ |
| 100 | int key_set; /* Set if key initialised */ |
| 101 | int iv_set; /* Set if an iv is set */ |
| 102 | int tag_set; /* Set if tag is valid */ |
| 103 | int len_set; /* Set if message length set */ |
| 104 | int L, M; /* L and M parameters from RFC3610 */ |
| 105 | CCM128_CONTEXT ccm; |
| 106 | ccm128_f str; |
| 107 | } EVP_AES_CCM_CTX; |
| 108 | |
| 109 | #define MAXBITCHUNK ((size_t)1<<(sizeof(size_t)*8-4)) |
| 110 | |
| 111 | #ifdef VPAES_ASM |
| 112 | int vpaes_set_encrypt_key(const unsigned char *userKey, int bits, |
| 113 | AES_KEY *key); |
| 114 | int vpaes_set_decrypt_key(const unsigned char *userKey, int bits, |
| 115 | AES_KEY *key); |
| 116 | |
| 117 | void vpaes_encrypt(const unsigned char *in, unsigned char *out, |
| 118 | const AES_KEY *key); |
| 119 | void vpaes_decrypt(const unsigned char *in, unsigned char *out, |
| 120 | const AES_KEY *key); |
| 121 | |
| 122 | void vpaes_cbc_encrypt(const unsigned char *in, |
| 123 | unsigned char *out, |
| 124 | size_t length, |
| 125 | const AES_KEY *key, |
| 126 | unsigned char *ivec, int enc); |
| 127 | #endif |
| 128 | #ifdef BSAES_ASM |
| 129 | void bsaes_cbc_encrypt(const unsigned char *in, unsigned char *out, |
| 130 | size_t length, const AES_KEY *key, |
| 131 | unsigned char ivec[16], int enc); |
| 132 | void bsaes_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out, |
| 133 | size_t len, const AES_KEY *key, |
| 134 | const unsigned char ivec[16]); |
| 135 | void bsaes_xts_encrypt(const unsigned char *inp, unsigned char *out, |
| 136 | size_t len, const AES_KEY *key1, |
| 137 | const AES_KEY *key2, const unsigned char iv[16]); |
| 138 | void bsaes_xts_decrypt(const unsigned char *inp, unsigned char *out, |
| 139 | size_t len, const AES_KEY *key1, |
| 140 | const AES_KEY *key2, const unsigned char iv[16]); |
| 141 | #endif |
| 142 | #ifdef AES_CTR_ASM |
| 143 | void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out, |
| 144 | size_t blocks, const AES_KEY *key, |
| 145 | const unsigned char ivec[AES_BLOCK_SIZE]); |
| 146 | #endif |
| 147 | #ifdef AES_XTS_ASM |
| 148 | void AES_xts_encrypt(const char *inp,char *out,size_t len, |
| 149 | const AES_KEY *key1, const AES_KEY *key2, |
| 150 | const unsigned char iv[16]); |
| 151 | void AES_xts_decrypt(const char *inp,char *out,size_t len, |
| 152 | const AES_KEY *key1, const AES_KEY *key2, |
| 153 | const unsigned char iv[16]); |
| 154 | #endif |
| 155 | |
| 156 | #if defined(AES_ASM) && !defined(I386_ONLY) && ( \ |
| 157 | ((defined(__i386) || defined(__i386__) || \ |
| 158 | defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \ |
| 159 | defined(__x86_64) || defined(__x86_64__) || \ |
| 160 | defined(_M_AMD64) || defined(_M_X64) || \ |
| 161 | defined(__INTEL__) ) |
| 162 | |
| 163 | extern unsigned int OPENSSL_ia32cap_P[2]; |
| 164 | |
| 165 | #ifdef VPAES_ASM |
| 166 | #define VPAES_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(41-32))) |
| 167 | #endif |
| 168 | #ifdef BSAES_ASM |
| 169 | #define BSAES_CAPABLE VPAES_CAPABLE |
| 170 | #endif |
| 171 | /* |
| 172 | * AES-NI section |
| 173 | */ |
| 174 | #define AESNI_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(57-32))) |
| 175 | |
| 176 | int aesni_set_encrypt_key(const unsigned char *userKey, int bits, |
| 177 | AES_KEY *key); |
| 178 | int aesni_set_decrypt_key(const unsigned char *userKey, int bits, |
| 179 | AES_KEY *key); |
| 180 | |
| 181 | void aesni_encrypt(const unsigned char *in, unsigned char *out, |
| 182 | const AES_KEY *key); |
| 183 | void aesni_decrypt(const unsigned char *in, unsigned char *out, |
| 184 | const AES_KEY *key); |
| 185 | |
| 186 | void aesni_ecb_encrypt(const unsigned char *in, |
| 187 | unsigned char *out, |
| 188 | size_t length, |
| 189 | const AES_KEY *key, |
| 190 | int enc); |
| 191 | void aesni_cbc_encrypt(const unsigned char *in, |
| 192 | unsigned char *out, |
| 193 | size_t length, |
| 194 | const AES_KEY *key, |
| 195 | unsigned char *ivec, int enc); |
| 196 | |
| 197 | void aesni_ctr32_encrypt_blocks(const unsigned char *in, |
| 198 | unsigned char *out, |
| 199 | size_t blocks, |
| 200 | const void *key, |
| 201 | const unsigned char *ivec); |
| 202 | |
| 203 | void aesni_xts_encrypt(const unsigned char *in, |
| 204 | unsigned char *out, |
| 205 | size_t length, |
| 206 | const AES_KEY *key1, const AES_KEY *key2, |
| 207 | const unsigned char iv[16]); |
| 208 | |
| 209 | void aesni_xts_decrypt(const unsigned char *in, |
| 210 | unsigned char *out, |
| 211 | size_t length, |
| 212 | const AES_KEY *key1, const AES_KEY *key2, |
| 213 | const unsigned char iv[16]); |
| 214 | |
| 215 | void aesni_ccm64_encrypt_blocks (const unsigned char *in, |
| 216 | unsigned char *out, |
| 217 | size_t blocks, |
| 218 | const void *key, |
| 219 | const unsigned char ivec[16], |
| 220 | unsigned char cmac[16]); |
| 221 | |
| 222 | void aesni_ccm64_decrypt_blocks (const unsigned char *in, |
| 223 | unsigned char *out, |
| 224 | size_t blocks, |
| 225 | const void *key, |
| 226 | const unsigned char ivec[16], |
| 227 | unsigned char cmac[16]); |
| 228 | |
| 229 | static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 230 | const unsigned char *iv, int enc) |
| 231 | { |
| 232 | int ret, mode; |
| 233 | EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; |
| 234 | |
| 235 | mode = ctx->cipher->flags & EVP_CIPH_MODE; |
| 236 | if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) |
| 237 | && !enc) |
| 238 | { |
| 239 | ret = aesni_set_decrypt_key(key, ctx->key_len*8, ctx->cipher_data); |
| 240 | dat->block = (block128_f)aesni_decrypt; |
| 241 | dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? |
| 242 | (cbc128_f)aesni_cbc_encrypt : |
| 243 | NULL; |
| 244 | } |
| 245 | else { |
| 246 | ret = aesni_set_encrypt_key(key, ctx->key_len*8, ctx->cipher_data); |
| 247 | dat->block = (block128_f)aesni_encrypt; |
| 248 | if (mode==EVP_CIPH_CBC_MODE) |
| 249 | dat->stream.cbc = (cbc128_f)aesni_cbc_encrypt; |
| 250 | else if (mode==EVP_CIPH_CTR_MODE) |
| 251 | dat->stream.ctr = (ctr128_f)aesni_ctr32_encrypt_blocks; |
| 252 | else |
| 253 | dat->stream.cbc = NULL; |
| 254 | } |
| 255 | |
| 256 | if(ret < 0) |
| 257 | { |
| 258 | EVPerr(EVP_F_AESNI_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED); |
| 259 | return 0; |
| 260 | } |
| 261 | |
| 262 | return 1; |
| 263 | } |
| 264 | |
| 265 | static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 266 | const unsigned char *in, size_t len) |
| 267 | { |
| 268 | aesni_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt); |
| 269 | |
| 270 | return 1; |
| 271 | } |
| 272 | |
| 273 | static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 274 | const unsigned char *in, size_t len) |
| 275 | { |
| 276 | size_t bl = ctx->cipher->block_size; |
| 277 | |
| 278 | if (len<bl) return 1; |
| 279 | |
| 280 | aesni_ecb_encrypt(in,out,len,ctx->cipher_data,ctx->encrypt); |
| 281 | |
| 282 | return 1; |
| 283 | } |
| 284 | |
| 285 | #define aesni_ofb_cipher aes_ofb_cipher |
| 286 | static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 287 | const unsigned char *in,size_t len); |
| 288 | |
| 289 | #define aesni_cfb_cipher aes_cfb_cipher |
| 290 | static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 291 | const unsigned char *in,size_t len); |
| 292 | |
| 293 | #define aesni_cfb8_cipher aes_cfb8_cipher |
| 294 | static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 295 | const unsigned char *in,size_t len); |
| 296 | |
| 297 | #define aesni_cfb1_cipher aes_cfb1_cipher |
| 298 | static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 299 | const unsigned char *in,size_t len); |
| 300 | |
| 301 | #define aesni_ctr_cipher aes_ctr_cipher |
| 302 | static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 303 | const unsigned char *in, size_t len); |
| 304 | |
| 305 | static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 306 | const unsigned char *iv, int enc) |
| 307 | { |
| 308 | EVP_AES_GCM_CTX *gctx = ctx->cipher_data; |
| 309 | if (!iv && !key) |
| 310 | return 1; |
| 311 | if (key) |
| 312 | { |
| 313 | aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); |
| 314 | CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, |
| 315 | (block128_f)aesni_encrypt); |
| 316 | gctx->ctr = (ctr128_f)aesni_ctr32_encrypt_blocks; |
| 317 | /* If we have an iv can set it directly, otherwise use |
| 318 | * saved IV. |
| 319 | */ |
| 320 | if (iv == NULL && gctx->iv_set) |
| 321 | iv = gctx->iv; |
| 322 | if (iv) |
| 323 | { |
| 324 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
| 325 | gctx->iv_set = 1; |
| 326 | } |
| 327 | gctx->key_set = 1; |
| 328 | } |
| 329 | else |
| 330 | { |
| 331 | /* If key set use IV, otherwise copy */ |
| 332 | if (gctx->key_set) |
| 333 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
| 334 | else |
| 335 | memcpy(gctx->iv, iv, gctx->ivlen); |
| 336 | gctx->iv_set = 1; |
| 337 | gctx->iv_gen = 0; |
| 338 | } |
| 339 | return 1; |
| 340 | } |
| 341 | |
| 342 | #define aesni_gcm_cipher aes_gcm_cipher |
| 343 | static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 344 | const unsigned char *in, size_t len); |
| 345 | |
| 346 | static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 347 | const unsigned char *iv, int enc) |
| 348 | { |
| 349 | EVP_AES_XTS_CTX *xctx = ctx->cipher_data; |
| 350 | if (!iv && !key) |
| 351 | return 1; |
| 352 | |
| 353 | if (key) |
| 354 | { |
| 355 | /* key_len is two AES keys */ |
| 356 | if (enc) |
| 357 | { |
| 358 | aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 359 | xctx->xts.block1 = (block128_f)aesni_encrypt; |
| 360 | xctx->stream = aesni_xts_encrypt; |
| 361 | } |
| 362 | else |
| 363 | { |
| 364 | aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 365 | xctx->xts.block1 = (block128_f)aesni_decrypt; |
| 366 | xctx->stream = aesni_xts_decrypt; |
| 367 | } |
| 368 | |
| 369 | aesni_set_encrypt_key(key + ctx->key_len/2, |
| 370 | ctx->key_len * 4, &xctx->ks2); |
| 371 | xctx->xts.block2 = (block128_f)aesni_encrypt; |
| 372 | |
| 373 | xctx->xts.key1 = &xctx->ks1; |
| 374 | } |
| 375 | |
| 376 | if (iv) |
| 377 | { |
| 378 | xctx->xts.key2 = &xctx->ks2; |
| 379 | memcpy(ctx->iv, iv, 16); |
| 380 | } |
| 381 | |
| 382 | return 1; |
| 383 | } |
| 384 | |
| 385 | #define aesni_xts_cipher aes_xts_cipher |
| 386 | static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 387 | const unsigned char *in, size_t len); |
| 388 | |
| 389 | static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 390 | const unsigned char *iv, int enc) |
| 391 | { |
| 392 | EVP_AES_CCM_CTX *cctx = ctx->cipher_data; |
| 393 | if (!iv && !key) |
| 394 | return 1; |
| 395 | if (key) |
| 396 | { |
| 397 | aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); |
| 398 | CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, |
| 399 | &cctx->ks, (block128_f)aesni_encrypt); |
| 400 | cctx->str = enc?(ccm128_f)aesni_ccm64_encrypt_blocks : |
| 401 | (ccm128_f)aesni_ccm64_decrypt_blocks; |
| 402 | cctx->key_set = 1; |
| 403 | } |
| 404 | if (iv) |
| 405 | { |
| 406 | memcpy(ctx->iv, iv, 15 - cctx->L); |
| 407 | cctx->iv_set = 1; |
| 408 | } |
| 409 | return 1; |
| 410 | } |
| 411 | |
| 412 | #define aesni_ccm_cipher aes_ccm_cipher |
| 413 | static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 414 | const unsigned char *in, size_t len); |
| 415 | |
| 416 | #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ |
| 417 | static const EVP_CIPHER aesni_##keylen##_##mode = { \ |
| 418 | nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ |
| 419 | flags|EVP_CIPH_##MODE##_MODE, \ |
| 420 | aesni_init_key, \ |
| 421 | aesni_##mode##_cipher, \ |
| 422 | NULL, \ |
| 423 | sizeof(EVP_AES_KEY), \ |
| 424 | NULL,NULL,NULL,NULL }; \ |
| 425 | static const EVP_CIPHER aes_##keylen##_##mode = { \ |
| 426 | nid##_##keylen##_##nmode,blocksize, \ |
| 427 | keylen/8,ivlen, \ |
| 428 | flags|EVP_CIPH_##MODE##_MODE, \ |
| 429 | aes_init_key, \ |
| 430 | aes_##mode##_cipher, \ |
| 431 | NULL, \ |
| 432 | sizeof(EVP_AES_KEY), \ |
| 433 | NULL,NULL,NULL,NULL }; \ |
| 434 | const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ |
| 435 | { return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; } |
| 436 | |
| 437 | #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ |
| 438 | static const EVP_CIPHER aesni_##keylen##_##mode = { \ |
| 439 | nid##_##keylen##_##mode,blocksize, \ |
| 440 | (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ |
| 441 | flags|EVP_CIPH_##MODE##_MODE, \ |
| 442 | aesni_##mode##_init_key, \ |
| 443 | aesni_##mode##_cipher, \ |
| 444 | aes_##mode##_cleanup, \ |
| 445 | sizeof(EVP_AES_##MODE##_CTX), \ |
| 446 | NULL,NULL,aes_##mode##_ctrl,NULL }; \ |
| 447 | static const EVP_CIPHER aes_##keylen##_##mode = { \ |
| 448 | nid##_##keylen##_##mode,blocksize, \ |
| 449 | (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ |
| 450 | flags|EVP_CIPH_##MODE##_MODE, \ |
| 451 | aes_##mode##_init_key, \ |
| 452 | aes_##mode##_cipher, \ |
| 453 | aes_##mode##_cleanup, \ |
| 454 | sizeof(EVP_AES_##MODE##_CTX), \ |
| 455 | NULL,NULL,aes_##mode##_ctrl,NULL }; \ |
| 456 | const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ |
| 457 | { return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; } |
| 458 | |
| 459 | #else |
| 460 | |
| 461 | #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ |
| 462 | static const EVP_CIPHER aes_##keylen##_##mode = { \ |
| 463 | nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ |
| 464 | flags|EVP_CIPH_##MODE##_MODE, \ |
| 465 | aes_init_key, \ |
| 466 | aes_##mode##_cipher, \ |
| 467 | NULL, \ |
| 468 | sizeof(EVP_AES_KEY), \ |
| 469 | NULL,NULL,NULL,NULL }; \ |
| 470 | const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ |
| 471 | { return &aes_##keylen##_##mode; } |
| 472 | |
| 473 | #define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ |
| 474 | static const EVP_CIPHER aes_##keylen##_##mode = { \ |
| 475 | nid##_##keylen##_##mode,blocksize, \ |
| 476 | (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ |
| 477 | flags|EVP_CIPH_##MODE##_MODE, \ |
| 478 | aes_##mode##_init_key, \ |
| 479 | aes_##mode##_cipher, \ |
| 480 | aes_##mode##_cleanup, \ |
| 481 | sizeof(EVP_AES_##MODE##_CTX), \ |
| 482 | NULL,NULL,aes_##mode##_ctrl,NULL }; \ |
| 483 | const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ |
| 484 | { return &aes_##keylen##_##mode; } |
| 485 | #endif |
| 486 | |
| 487 | #define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \ |
| 488 | BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ |
| 489 | BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ |
| 490 | BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ |
| 491 | BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ |
| 492 | BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \ |
| 493 | BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \ |
| 494 | BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags) |
| 495 | |
| 496 | static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 497 | const unsigned char *iv, int enc) |
| 498 | { |
| 499 | int ret, mode; |
| 500 | EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; |
| 501 | |
| 502 | mode = ctx->cipher->flags & EVP_CIPH_MODE; |
| 503 | if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) |
| 504 | && !enc) |
| 505 | #ifdef BSAES_CAPABLE |
| 506 | if (BSAES_CAPABLE && mode==EVP_CIPH_CBC_MODE) |
| 507 | { |
| 508 | ret = AES_set_decrypt_key(key,ctx->key_len*8,&dat->ks); |
| 509 | dat->block = (block128_f)AES_decrypt; |
| 510 | dat->stream.cbc = (cbc128_f)bsaes_cbc_encrypt; |
| 511 | } |
| 512 | else |
| 513 | #endif |
| 514 | #ifdef VPAES_CAPABLE |
| 515 | if (VPAES_CAPABLE) |
| 516 | { |
| 517 | ret = vpaes_set_decrypt_key(key,ctx->key_len*8,&dat->ks); |
| 518 | dat->block = (block128_f)vpaes_decrypt; |
| 519 | dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? |
| 520 | (cbc128_f)vpaes_cbc_encrypt : |
| 521 | NULL; |
| 522 | } |
| 523 | else |
| 524 | #endif |
| 525 | { |
| 526 | ret = AES_set_decrypt_key(key,ctx->key_len*8,&dat->ks); |
| 527 | dat->block = (block128_f)AES_decrypt; |
| 528 | dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? |
| 529 | (cbc128_f)AES_cbc_encrypt : |
| 530 | NULL; |
| 531 | } |
| 532 | else |
| 533 | #ifdef BSAES_CAPABLE |
| 534 | if (BSAES_CAPABLE && mode==EVP_CIPH_CTR_MODE) |
| 535 | { |
| 536 | ret = AES_set_encrypt_key(key,ctx->key_len*8,&dat->ks); |
| 537 | dat->block = (block128_f)AES_encrypt; |
| 538 | dat->stream.ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks; |
| 539 | } |
| 540 | else |
| 541 | #endif |
| 542 | #ifdef VPAES_CAPABLE |
| 543 | if (VPAES_CAPABLE) |
| 544 | { |
| 545 | ret = vpaes_set_encrypt_key(key,ctx->key_len*8,&dat->ks); |
| 546 | dat->block = (block128_f)vpaes_encrypt; |
| 547 | dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? |
| 548 | (cbc128_f)vpaes_cbc_encrypt : |
| 549 | NULL; |
| 550 | } |
| 551 | else |
| 552 | #endif |
| 553 | { |
| 554 | ret = AES_set_encrypt_key(key,ctx->key_len*8,&dat->ks); |
| 555 | dat->block = (block128_f)AES_encrypt; |
| 556 | dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? |
| 557 | (cbc128_f)AES_cbc_encrypt : |
| 558 | 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 | { |
| 567 | EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED); |
| 568 | return 0; |
| 569 | } |
| 570 | |
| 571 | return 1; |
| 572 | } |
| 573 | |
| 574 | static int 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,ctx->encrypt); |
| 581 | else if (ctx->encrypt) |
| 582 | CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block); |
| 583 | else |
| 584 | CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block); |
| 585 | |
| 586 | return 1; |
| 587 | } |
| 588 | |
| 589 | static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 590 | const unsigned char *in, size_t len) |
| 591 | { |
| 592 | size_t bl = ctx->cipher->block_size; |
| 593 | size_t i; |
| 594 | EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; |
| 595 | |
| 596 | if (len<bl) return 1; |
| 597 | |
| 598 | for (i=0,len-=bl;i<=len;i+=bl) |
| 599 | (*dat->block)(in+i,out+i,&dat->ks); |
| 600 | |
| 601 | return 1; |
| 602 | } |
| 603 | |
| 604 | static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 605 | const unsigned char *in,size_t len) |
| 606 | { |
| 607 | EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; |
| 608 | |
| 609 | CRYPTO_ofb128_encrypt(in,out,len,&dat->ks, |
| 610 | ctx->iv,&ctx->num,dat->block); |
| 611 | return 1; |
| 612 | } |
| 613 | |
| 614 | static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 615 | const unsigned char *in,size_t len) |
| 616 | { |
| 617 | EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; |
| 618 | |
| 619 | CRYPTO_cfb128_encrypt(in,out,len,&dat->ks, |
| 620 | ctx->iv,&ctx->num,ctx->encrypt,dat->block); |
| 621 | return 1; |
| 622 | } |
| 623 | |
| 624 | static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 625 | const unsigned char *in,size_t len) |
| 626 | { |
| 627 | EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; |
| 628 | |
| 629 | CRYPTO_cfb128_8_encrypt(in,out,len,&dat->ks, |
| 630 | ctx->iv,&ctx->num,ctx->encrypt,dat->block); |
| 631 | return 1; |
| 632 | } |
| 633 | |
| 634 | static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 635 | const unsigned char *in,size_t len) |
| 636 | { |
| 637 | EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; |
| 638 | |
| 639 | if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) { |
| 640 | CRYPTO_cfb128_1_encrypt(in,out,len,&dat->ks, |
| 641 | ctx->iv,&ctx->num,ctx->encrypt,dat->block); |
| 642 | return 1; |
| 643 | } |
| 644 | |
| 645 | while (len>=MAXBITCHUNK) { |
| 646 | CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,&dat->ks, |
| 647 | ctx->iv,&ctx->num,ctx->encrypt,dat->block); |
| 648 | len-=MAXBITCHUNK; |
| 649 | } |
| 650 | if (len) |
| 651 | CRYPTO_cfb128_1_encrypt(in,out,len*8,&dat->ks, |
| 652 | ctx->iv,&ctx->num,ctx->encrypt,dat->block); |
| 653 | |
| 654 | return 1; |
| 655 | } |
| 656 | |
| 657 | static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 658 | const unsigned char *in, size_t len) |
| 659 | { |
| 660 | unsigned int num = ctx->num; |
| 661 | EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; |
| 662 | |
| 663 | if (dat->stream.ctr) |
| 664 | CRYPTO_ctr128_encrypt_ctr32(in,out,len,&dat->ks, |
| 665 | ctx->iv,ctx->buf,&num,dat->stream.ctr); |
| 666 | else |
| 667 | CRYPTO_ctr128_encrypt(in,out,len,&dat->ks, |
| 668 | ctx->iv,ctx->buf,&num,dat->block); |
| 669 | ctx->num = (size_t)num; |
| 670 | return 1; |
| 671 | } |
| 672 | |
| 673 | BLOCK_CIPHER_generic_pack(NID_aes,128,EVP_CIPH_FLAG_FIPS) |
| 674 | BLOCK_CIPHER_generic_pack(NID_aes,192,EVP_CIPH_FLAG_FIPS) |
| 675 | BLOCK_CIPHER_generic_pack(NID_aes,256,EVP_CIPH_FLAG_FIPS) |
| 676 | |
| 677 | static int aes_gcm_cleanup(EVP_CIPHER_CTX *c) |
| 678 | { |
| 679 | EVP_AES_GCM_CTX *gctx = c->cipher_data; |
| 680 | OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm)); |
| 681 | if (gctx->iv != c->iv) |
| 682 | OPENSSL_free(gctx->iv); |
| 683 | return 1; |
| 684 | } |
| 685 | |
| 686 | /* increment counter (64-bit int) by 1 */ |
| 687 | static void ctr64_inc(unsigned char *counter) { |
| 688 | int n=8; |
| 689 | unsigned char c; |
| 690 | |
| 691 | do { |
| 692 | --n; |
| 693 | c = counter[n]; |
| 694 | ++c; |
| 695 | counter[n] = c; |
| 696 | if (c) return; |
| 697 | } while (n); |
| 698 | } |
| 699 | |
| 700 | static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
| 701 | { |
| 702 | EVP_AES_GCM_CTX *gctx = c->cipher_data; |
| 703 | switch (type) |
| 704 | { |
| 705 | case EVP_CTRL_INIT: |
| 706 | gctx->key_set = 0; |
| 707 | gctx->iv_set = 0; |
| 708 | gctx->ivlen = c->cipher->iv_len; |
| 709 | gctx->iv = c->iv; |
| 710 | gctx->taglen = -1; |
| 711 | gctx->iv_gen = 0; |
| 712 | gctx->tls_aad_len = -1; |
| 713 | return 1; |
| 714 | |
| 715 | case EVP_CTRL_GCM_SET_IVLEN: |
| 716 | if (arg <= 0) |
| 717 | return 0; |
| 718 | #ifdef OPENSSL_FIPS |
| 719 | if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) |
| 720 | && arg < 12) |
| 721 | return 0; |
| 722 | #endif |
| 723 | /* Allocate memory for IV if needed */ |
| 724 | if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) |
| 725 | { |
| 726 | if (gctx->iv != c->iv) |
| 727 | OPENSSL_free(gctx->iv); |
| 728 | gctx->iv = OPENSSL_malloc(arg); |
| 729 | if (!gctx->iv) |
| 730 | return 0; |
| 731 | } |
| 732 | gctx->ivlen = arg; |
| 733 | return 1; |
| 734 | |
| 735 | case EVP_CTRL_GCM_SET_TAG: |
| 736 | if (arg <= 0 || arg > 16 || c->encrypt) |
| 737 | return 0; |
| 738 | memcpy(c->buf, ptr, arg); |
| 739 | gctx->taglen = arg; |
| 740 | return 1; |
| 741 | |
| 742 | case EVP_CTRL_GCM_GET_TAG: |
| 743 | if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0) |
| 744 | return 0; |
| 745 | memcpy(ptr, c->buf, arg); |
| 746 | return 1; |
| 747 | |
| 748 | case EVP_CTRL_GCM_SET_IV_FIXED: |
| 749 | /* Special case: -1 length restores whole IV */ |
| 750 | if (arg == -1) |
| 751 | { |
| 752 | memcpy(gctx->iv, ptr, gctx->ivlen); |
| 753 | gctx->iv_gen = 1; |
| 754 | return 1; |
| 755 | } |
| 756 | /* Fixed field must be at least 4 bytes and invocation field |
| 757 | * at least 8. |
| 758 | */ |
| 759 | if ((arg < 4) || (gctx->ivlen - arg) < 8) |
| 760 | return 0; |
| 761 | if (arg) |
| 762 | memcpy(gctx->iv, ptr, arg); |
| 763 | if (c->encrypt && |
| 764 | RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) |
| 765 | return 0; |
| 766 | gctx->iv_gen = 1; |
| 767 | return 1; |
| 768 | |
| 769 | case EVP_CTRL_GCM_IV_GEN: |
| 770 | if (gctx->iv_gen == 0 || gctx->key_set == 0) |
| 771 | return 0; |
| 772 | CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); |
| 773 | if (arg <= 0 || arg > gctx->ivlen) |
| 774 | arg = gctx->ivlen; |
| 775 | memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg); |
| 776 | /* Invocation field will be at least 8 bytes in size and |
| 777 | * so no need to check wrap around or increment more than |
| 778 | * last 8 bytes. |
| 779 | */ |
| 780 | ctr64_inc(gctx->iv + gctx->ivlen - 8); |
| 781 | gctx->iv_set = 1; |
| 782 | return 1; |
| 783 | |
| 784 | case EVP_CTRL_GCM_SET_IV_INV: |
| 785 | if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt) |
| 786 | return 0; |
| 787 | memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); |
| 788 | CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); |
| 789 | gctx->iv_set = 1; |
| 790 | return 1; |
| 791 | |
| 792 | case EVP_CTRL_AEAD_TLS1_AAD: |
| 793 | /* Save the AAD for later use */ |
| 794 | if (arg != 13) |
| 795 | return 0; |
| 796 | memcpy(c->buf, ptr, arg); |
| 797 | gctx->tls_aad_len = arg; |
| 798 | { |
| 799 | unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1]; |
| 800 | /* Correct length for explicit IV */ |
| 801 | len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; |
| 802 | /* If decrypting correct for tag too */ |
| 803 | if (!c->encrypt) |
| 804 | len -= EVP_GCM_TLS_TAG_LEN; |
| 805 | c->buf[arg-2] = len>>8; |
| 806 | c->buf[arg-1] = len & 0xff; |
| 807 | } |
| 808 | /* Extra padding: tag appended to record */ |
| 809 | return EVP_GCM_TLS_TAG_LEN; |
| 810 | |
| 811 | default: |
| 812 | return -1; |
| 813 | |
| 814 | } |
| 815 | } |
| 816 | |
| 817 | static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 818 | const unsigned char *iv, int enc) |
| 819 | { |
| 820 | EVP_AES_GCM_CTX *gctx = ctx->cipher_data; |
| 821 | if (!iv && !key) |
| 822 | return 1; |
| 823 | if (key) |
| 824 | { do { |
| 825 | #ifdef BSAES_CAPABLE |
| 826 | if (BSAES_CAPABLE) |
| 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 | gctx->ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks; |
| 832 | break; |
| 833 | } |
| 834 | else |
| 835 | #endif |
| 836 | #ifdef VPAES_CAPABLE |
| 837 | if (VPAES_CAPABLE) |
| 838 | { |
| 839 | vpaes_set_encrypt_key(key,ctx->key_len*8,&gctx->ks); |
| 840 | CRYPTO_gcm128_init(&gctx->gcm,&gctx->ks, |
| 841 | (block128_f)vpaes_encrypt); |
| 842 | gctx->ctr = NULL; |
| 843 | break; |
| 844 | } |
| 845 | #endif |
| 846 | AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); |
| 847 | CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt); |
| 848 | #ifdef AES_CTR_ASM |
| 849 | gctx->ctr = (ctr128_f)AES_ctr32_encrypt; |
| 850 | #else |
| 851 | gctx->ctr = NULL; |
| 852 | #endif |
| 853 | } while (0); |
| 854 | |
| 855 | /* If we have an iv can set it directly, otherwise use |
| 856 | * saved IV. |
| 857 | */ |
| 858 | if (iv == NULL && gctx->iv_set) |
| 859 | iv = gctx->iv; |
| 860 | if (iv) |
| 861 | { |
| 862 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
| 863 | gctx->iv_set = 1; |
| 864 | } |
| 865 | gctx->key_set = 1; |
| 866 | } |
| 867 | else |
| 868 | { |
| 869 | /* If key set use IV, otherwise copy */ |
| 870 | if (gctx->key_set) |
| 871 | CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
| 872 | else |
| 873 | memcpy(gctx->iv, iv, gctx->ivlen); |
| 874 | gctx->iv_set = 1; |
| 875 | gctx->iv_gen = 0; |
| 876 | } |
| 877 | return 1; |
| 878 | } |
| 879 | |
| 880 | /* Handle TLS GCM packet format. This consists of the last portion of the IV |
| 881 | * followed by the payload and finally the tag. On encrypt generate IV, |
| 882 | * encrypt payload and write the tag. On verify retrieve IV, decrypt payload |
| 883 | * and verify tag. |
| 884 | */ |
| 885 | |
| 886 | static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 887 | const unsigned char *in, size_t len) |
| 888 | { |
| 889 | EVP_AES_GCM_CTX *gctx = ctx->cipher_data; |
| 890 | int rv = -1; |
| 891 | /* Encrypt/decrypt must be performed in place */ |
| 892 | if (out != in || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN+EVP_GCM_TLS_TAG_LEN)) |
| 893 | return -1; |
| 894 | /* Set IV from start of buffer or generate IV and write to start |
| 895 | * of buffer. |
| 896 | */ |
| 897 | if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ? |
| 898 | EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV, |
| 899 | EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) |
| 900 | goto err; |
| 901 | /* Use saved AAD */ |
| 902 | if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len)) |
| 903 | goto err; |
| 904 | /* Fix buffer and length to point to payload */ |
| 905 | in += EVP_GCM_TLS_EXPLICIT_IV_LEN; |
| 906 | out += EVP_GCM_TLS_EXPLICIT_IV_LEN; |
| 907 | len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; |
| 908 | if (ctx->encrypt) |
| 909 | { |
| 910 | /* Encrypt payload */ |
| 911 | if (gctx->ctr) |
| 912 | { |
| 913 | if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, |
| 914 | in, out, len, |
| 915 | gctx->ctr)) |
| 916 | goto err; |
| 917 | } |
| 918 | else { |
| 919 | if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) |
| 920 | goto err; |
| 921 | } |
| 922 | out += len; |
| 923 | /* Finally write tag */ |
| 924 | CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN); |
| 925 | rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; |
| 926 | } |
| 927 | else |
| 928 | { |
| 929 | /* Decrypt */ |
| 930 | if (gctx->ctr) |
| 931 | { |
| 932 | if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, |
| 933 | in, out, len, |
| 934 | gctx->ctr)) |
| 935 | goto err; |
| 936 | } |
| 937 | else { |
| 938 | if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) |
| 939 | goto err; |
| 940 | } |
| 941 | /* Retrieve tag */ |
| 942 | CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, |
| 943 | EVP_GCM_TLS_TAG_LEN); |
| 944 | /* If tag mismatch wipe buffer */ |
| 945 | if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) |
| 946 | { |
| 947 | OPENSSL_cleanse(out, len); |
| 948 | goto err; |
| 949 | } |
| 950 | rv = len; |
| 951 | } |
| 952 | |
| 953 | err: |
| 954 | gctx->iv_set = 0; |
| 955 | gctx->tls_aad_len = -1; |
| 956 | return rv; |
| 957 | } |
| 958 | |
| 959 | static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 960 | const unsigned char *in, size_t len) |
| 961 | { |
| 962 | EVP_AES_GCM_CTX *gctx = ctx->cipher_data; |
| 963 | /* If not set up, return error */ |
| 964 | if (!gctx->key_set) |
| 965 | return -1; |
| 966 | |
| 967 | if (gctx->tls_aad_len >= 0) |
| 968 | return aes_gcm_tls_cipher(ctx, out, in, len); |
| 969 | |
| 970 | if (!gctx->iv_set) |
| 971 | return -1; |
| 972 | if (!ctx->encrypt && gctx->taglen < 0) |
| 973 | return -1; |
| 974 | if (in) |
| 975 | { |
| 976 | if (out == NULL) |
| 977 | { |
| 978 | if (CRYPTO_gcm128_aad(&gctx->gcm, in, len)) |
| 979 | return -1; |
| 980 | } |
| 981 | else if (ctx->encrypt) |
| 982 | { |
| 983 | if (gctx->ctr) |
| 984 | { |
| 985 | if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, |
| 986 | in, out, len, |
| 987 | gctx->ctr)) |
| 988 | return -1; |
| 989 | } |
| 990 | else { |
| 991 | if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) |
| 992 | return -1; |
| 993 | } |
| 994 | } |
| 995 | else |
| 996 | { |
| 997 | if (gctx->ctr) |
| 998 | { |
| 999 | if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, |
| 1000 | in, out, len, |
| 1001 | gctx->ctr)) |
| 1002 | return -1; |
| 1003 | } |
| 1004 | else { |
| 1005 | if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) |
| 1006 | return -1; |
| 1007 | } |
| 1008 | } |
| 1009 | return len; |
| 1010 | } |
| 1011 | else |
| 1012 | { |
| 1013 | if (!ctx->encrypt) |
| 1014 | { |
| 1015 | if (CRYPTO_gcm128_finish(&gctx->gcm, |
| 1016 | ctx->buf, gctx->taglen) != 0) |
| 1017 | return -1; |
| 1018 | gctx->iv_set = 0; |
| 1019 | return 0; |
| 1020 | } |
| 1021 | CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16); |
| 1022 | gctx->taglen = 16; |
| 1023 | /* Don't reuse the IV */ |
| 1024 | gctx->iv_set = 0; |
| 1025 | return 0; |
| 1026 | } |
| 1027 | |
| 1028 | } |
| 1029 | |
| 1030 | #define CUSTOM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ |
| 1031 | | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ |
| 1032 | | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT) |
| 1033 | |
| 1034 | BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM, |
| 1035 | EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) |
| 1036 | BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM, |
| 1037 | EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) |
| 1038 | BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM, |
| 1039 | EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) |
| 1040 | |
| 1041 | static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
| 1042 | { |
| 1043 | EVP_AES_XTS_CTX *xctx = c->cipher_data; |
| 1044 | if (type != EVP_CTRL_INIT) |
| 1045 | return -1; |
| 1046 | /* key1 and key2 are used as an indicator both key and IV are set */ |
| 1047 | xctx->xts.key1 = NULL; |
| 1048 | xctx->xts.key2 = NULL; |
| 1049 | return 1; |
| 1050 | } |
| 1051 | |
| 1052 | static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 1053 | const unsigned char *iv, int enc) |
| 1054 | { |
| 1055 | EVP_AES_XTS_CTX *xctx = ctx->cipher_data; |
| 1056 | if (!iv && !key) |
| 1057 | return 1; |
| 1058 | |
| 1059 | if (key) do |
| 1060 | { |
| 1061 | #ifdef AES_XTS_ASM |
| 1062 | xctx->stream = enc ? AES_xts_encrypt : AES_xts_decrypt; |
| 1063 | #else |
| 1064 | xctx->stream = NULL; |
| 1065 | #endif |
| 1066 | /* key_len is two AES keys */ |
| 1067 | #ifdef BSAES_CAPABLE |
| 1068 | if (BSAES_CAPABLE) |
| 1069 | xctx->stream = enc ? bsaes_xts_encrypt : bsaes_xts_decrypt; |
| 1070 | else |
| 1071 | #endif |
| 1072 | #ifdef VPAES_CAPABLE |
| 1073 | if (VPAES_CAPABLE) |
| 1074 | { |
| 1075 | if (enc) |
| 1076 | { |
| 1077 | vpaes_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 1078 | xctx->xts.block1 = (block128_f)vpaes_encrypt; |
| 1079 | } |
| 1080 | else |
| 1081 | { |
| 1082 | vpaes_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 1083 | xctx->xts.block1 = (block128_f)vpaes_decrypt; |
| 1084 | } |
| 1085 | |
| 1086 | vpaes_set_encrypt_key(key + ctx->key_len/2, |
| 1087 | ctx->key_len * 4, &xctx->ks2); |
| 1088 | xctx->xts.block2 = (block128_f)vpaes_encrypt; |
| 1089 | |
| 1090 | xctx->xts.key1 = &xctx->ks1; |
| 1091 | break; |
| 1092 | } |
| 1093 | #endif |
| 1094 | if (enc) |
| 1095 | { |
| 1096 | AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 1097 | xctx->xts.block1 = (block128_f)AES_encrypt; |
| 1098 | } |
| 1099 | else |
| 1100 | { |
| 1101 | AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 1102 | xctx->xts.block1 = (block128_f)AES_decrypt; |
| 1103 | } |
| 1104 | |
| 1105 | AES_set_encrypt_key(key + ctx->key_len/2, |
| 1106 | ctx->key_len * 4, &xctx->ks2); |
| 1107 | xctx->xts.block2 = (block128_f)AES_encrypt; |
| 1108 | |
| 1109 | xctx->xts.key1 = &xctx->ks1; |
| 1110 | } while (0); |
| 1111 | |
| 1112 | if (iv) |
| 1113 | { |
| 1114 | xctx->xts.key2 = &xctx->ks2; |
| 1115 | memcpy(ctx->iv, iv, 16); |
| 1116 | } |
| 1117 | |
| 1118 | return 1; |
| 1119 | } |
| 1120 | |
| 1121 | static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 1122 | const unsigned char *in, size_t len) |
| 1123 | { |
| 1124 | EVP_AES_XTS_CTX *xctx = ctx->cipher_data; |
| 1125 | if (!xctx->xts.key1 || !xctx->xts.key2) |
| 1126 | return 0; |
| 1127 | if (!out || !in || len<AES_BLOCK_SIZE) |
| 1128 | return 0; |
| 1129 | #ifdef OPENSSL_FIPS |
| 1130 | /* Requirement of SP800-38E */ |
| 1131 | if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) && |
| 1132 | (len > (1UL<<20)*16)) |
| 1133 | { |
| 1134 | EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE); |
| 1135 | return 0; |
| 1136 | } |
| 1137 | #endif |
| 1138 | if (xctx->stream) |
| 1139 | (*xctx->stream)(in, out, len, |
| 1140 | xctx->xts.key1, xctx->xts.key2, ctx->iv); |
| 1141 | else if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len, |
| 1142 | ctx->encrypt)) |
| 1143 | return 0; |
| 1144 | return 1; |
| 1145 | } |
| 1146 | |
| 1147 | #define aes_xts_cleanup NULL |
| 1148 | |
| 1149 | #define XTS_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV \ |
| 1150 | | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT) |
| 1151 | |
| 1152 | BLOCK_CIPHER_custom(NID_aes,128,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|XTS_FLAGS) |
| 1153 | BLOCK_CIPHER_custom(NID_aes,256,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|XTS_FLAGS) |
| 1154 | |
| 1155 | static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
| 1156 | { |
| 1157 | EVP_AES_CCM_CTX *cctx = c->cipher_data; |
| 1158 | switch (type) |
| 1159 | { |
| 1160 | case EVP_CTRL_INIT: |
| 1161 | cctx->key_set = 0; |
| 1162 | cctx->iv_set = 0; |
| 1163 | cctx->L = 8; |
| 1164 | cctx->M = 12; |
| 1165 | cctx->tag_set = 0; |
| 1166 | cctx->len_set = 0; |
| 1167 | return 1; |
| 1168 | |
| 1169 | case EVP_CTRL_CCM_SET_IVLEN: |
| 1170 | arg = 15 - arg; |
| 1171 | case EVP_CTRL_CCM_SET_L: |
| 1172 | if (arg < 2 || arg > 8) |
| 1173 | return 0; |
| 1174 | cctx->L = arg; |
| 1175 | return 1; |
| 1176 | |
| 1177 | case EVP_CTRL_CCM_SET_TAG: |
| 1178 | if ((arg & 1) || arg < 4 || arg > 16) |
| 1179 | return 0; |
| 1180 | if ((c->encrypt && ptr) || (!c->encrypt && !ptr)) |
| 1181 | return 0; |
| 1182 | if (ptr) |
| 1183 | { |
| 1184 | cctx->tag_set = 1; |
| 1185 | memcpy(c->buf, ptr, arg); |
| 1186 | } |
| 1187 | cctx->M = arg; |
| 1188 | return 1; |
| 1189 | |
| 1190 | case EVP_CTRL_CCM_GET_TAG: |
| 1191 | if (!c->encrypt || !cctx->tag_set) |
| 1192 | return 0; |
| 1193 | if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg)) |
| 1194 | return 0; |
| 1195 | cctx->tag_set = 0; |
| 1196 | cctx->iv_set = 0; |
| 1197 | cctx->len_set = 0; |
| 1198 | return 1; |
| 1199 | |
| 1200 | default: |
| 1201 | return -1; |
| 1202 | |
| 1203 | } |
| 1204 | } |
| 1205 | |
| 1206 | static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 1207 | const unsigned char *iv, int enc) |
| 1208 | { |
| 1209 | EVP_AES_CCM_CTX *cctx = ctx->cipher_data; |
| 1210 | if (!iv && !key) |
| 1211 | return 1; |
| 1212 | if (key) do |
| 1213 | { |
| 1214 | #ifdef VPAES_CAPABLE |
| 1215 | if (VPAES_CAPABLE) |
| 1216 | { |
| 1217 | vpaes_set_encrypt_key(key, ctx->key_len*8, &cctx->ks); |
| 1218 | CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, |
| 1219 | &cctx->ks, (block128_f)vpaes_encrypt); |
| 1220 | cctx->key_set = 1; |
| 1221 | break; |
| 1222 | } |
| 1223 | #endif |
| 1224 | AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); |
| 1225 | CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, |
| 1226 | &cctx->ks, (block128_f)AES_encrypt); |
| 1227 | cctx->str = NULL; |
| 1228 | cctx->key_set = 1; |
| 1229 | } while (0); |
| 1230 | if (iv) |
| 1231 | { |
| 1232 | memcpy(ctx->iv, iv, 15 - cctx->L); |
| 1233 | cctx->iv_set = 1; |
| 1234 | } |
| 1235 | return 1; |
| 1236 | } |
| 1237 | |
| 1238 | static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 1239 | const unsigned char *in, size_t len) |
| 1240 | { |
| 1241 | EVP_AES_CCM_CTX *cctx = ctx->cipher_data; |
| 1242 | CCM128_CONTEXT *ccm = &cctx->ccm; |
| 1243 | /* If not set up, return error */ |
| 1244 | if (!cctx->iv_set && !cctx->key_set) |
| 1245 | return -1; |
| 1246 | if (!ctx->encrypt && !cctx->tag_set) |
| 1247 | return -1; |
| 1248 | if (!out) |
| 1249 | { |
| 1250 | if (!in) |
| 1251 | { |
| 1252 | if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len)) |
| 1253 | return -1; |
| 1254 | cctx->len_set = 1; |
| 1255 | return len; |
| 1256 | } |
| 1257 | /* If have AAD need message length */ |
| 1258 | if (!cctx->len_set && len) |
| 1259 | return -1; |
| 1260 | CRYPTO_ccm128_aad(ccm, in, len); |
| 1261 | return len; |
| 1262 | } |
| 1263 | /* EVP_*Final() doesn't return any data */ |
| 1264 | if (!in) |
| 1265 | return 0; |
| 1266 | /* If not set length yet do it */ |
| 1267 | if (!cctx->len_set) |
| 1268 | { |
| 1269 | if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) |
| 1270 | return -1; |
| 1271 | cctx->len_set = 1; |
| 1272 | } |
| 1273 | if (ctx->encrypt) |
| 1274 | { |
| 1275 | if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, |
| 1276 | cctx->str) : |
| 1277 | CRYPTO_ccm128_encrypt(ccm, in, out, len)) |
| 1278 | return -1; |
| 1279 | cctx->tag_set = 1; |
| 1280 | return len; |
| 1281 | } |
| 1282 | else |
| 1283 | { |
| 1284 | int rv = -1; |
| 1285 | if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, |
| 1286 | cctx->str) : |
| 1287 | !CRYPTO_ccm128_decrypt(ccm, in, out, len)) |
| 1288 | { |
| 1289 | unsigned char tag[16]; |
| 1290 | if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) |
| 1291 | { |
| 1292 | if (!memcmp(tag, ctx->buf, cctx->M)) |
| 1293 | rv = len; |
| 1294 | } |
| 1295 | } |
| 1296 | if (rv == -1) |
| 1297 | OPENSSL_cleanse(out, len); |
| 1298 | cctx->iv_set = 0; |
| 1299 | cctx->tag_set = 0; |
| 1300 | cctx->len_set = 0; |
| 1301 | return rv; |
| 1302 | } |
| 1303 | |
| 1304 | } |
| 1305 | |
| 1306 | #define aes_ccm_cleanup NULL |
| 1307 | |
| 1308 | BLOCK_CIPHER_custom(NID_aes,128,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS) |
| 1309 | BLOCK_CIPHER_custom(NID_aes,192,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS) |
| 1310 | BLOCK_CIPHER_custom(NID_aes,256,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS) |
| 1311 | |
| 1312 | #endif |
| 1313 | #endif |