1 /* ==================================================================== 2 * Copyright (c) 2008 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 (at) 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 #ifndef OPENSSL_HEADER_MODES_INTERNAL_H 50 #define OPENSSL_HEADER_MODES_INTERNAL_H 51 52 #include <openssl/base.h> 53 54 #include <openssl/aes.h> 55 #include <openssl/cpu.h> 56 57 #include <stdlib.h> 58 #include <string.h> 59 60 #include "../../internal.h" 61 62 #if defined(__cplusplus) 63 extern "C" { 64 #endif 65 66 67 static inline uint32_t GETU32(const void *in) { 68 uint32_t v; 69 OPENSSL_memcpy(&v, in, sizeof(v)); 70 return CRYPTO_bswap4(v); 71 } 72 73 static inline void PUTU32(void *out, uint32_t v) { 74 v = CRYPTO_bswap4(v); 75 OPENSSL_memcpy(out, &v, sizeof(v)); 76 } 77 78 static inline size_t load_word_le(const void *in) { 79 size_t v; 80 OPENSSL_memcpy(&v, in, sizeof(v)); 81 return v; 82 } 83 84 static inline void store_word_le(void *out, size_t v) { 85 OPENSSL_memcpy(out, &v, sizeof(v)); 86 } 87 88 // block128_f is the type of an AES block cipher implementation. 89 // 90 // Unlike upstream OpenSSL, it and the other functions in this file hard-code 91 // |AES_KEY|. It is undefined in C to call a function pointer with anything 92 // other than the original type. Thus we either must match |block128_f| to the 93 // type signature of |AES_encrypt| and friends or pass in |void*| wrapper 94 // functions. 95 // 96 // These functions are called exclusively with AES, so we use the former. 97 typedef void (*block128_f)(const uint8_t in[16], uint8_t out[16], 98 const AES_KEY *key); 99 100 101 // CTR. 102 103 // ctr128_f is the type of a function that performs CTR-mode encryption. 104 typedef void (*ctr128_f)(const uint8_t *in, uint8_t *out, size_t blocks, 105 const AES_KEY *key, const uint8_t ivec[16]); 106 107 // CRYPTO_ctr128_encrypt encrypts (or decrypts, it's the same in CTR mode) 108 // |len| bytes from |in| to |out| using |block| in counter mode. There's no 109 // requirement that |len| be a multiple of any value and any partial blocks are 110 // stored in |ecount_buf| and |*num|, which must be zeroed before the initial 111 // call. The counter is a 128-bit, big-endian value in |ivec| and is 112 // incremented by this function. 113 void CRYPTO_ctr128_encrypt(const uint8_t *in, uint8_t *out, size_t len, 114 const AES_KEY *key, uint8_t ivec[16], 115 uint8_t ecount_buf[16], unsigned *num, 116 block128_f block); 117 118 // CRYPTO_ctr128_encrypt_ctr32 acts like |CRYPTO_ctr128_encrypt| but takes 119 // |ctr|, a function that performs CTR mode but only deals with the lower 32 120 // bits of the counter. This is useful when |ctr| can be an optimised 121 // function. 122 void CRYPTO_ctr128_encrypt_ctr32(const uint8_t *in, uint8_t *out, size_t len, 123 const AES_KEY *key, uint8_t ivec[16], 124 uint8_t ecount_buf[16], unsigned *num, 125 ctr128_f ctr); 126 127 128 // GCM. 129 // 130 // This API differs from the upstream API slightly. The |GCM128_CONTEXT| does 131 // not have a |key| pointer that points to the key as upstream's version does. 132 // Instead, every function takes a |key| parameter. This way |GCM128_CONTEXT| 133 // can be safely copied. Additionally, |gcm_key| is split into a separate 134 // struct. 135 136 typedef struct { uint64_t hi,lo; } u128; 137 138 // gmult_func multiplies |Xi| by the GCM key and writes the result back to 139 // |Xi|. 140 typedef void (*gmult_func)(uint64_t Xi[2], const u128 Htable[16]); 141 142 // ghash_func repeatedly multiplies |Xi| by the GCM key and adds in blocks from 143 // |inp|. The result is written back to |Xi| and the |len| argument must be a 144 // multiple of 16. 145 typedef void (*ghash_func)(uint64_t Xi[2], const u128 Htable[16], 146 const uint8_t *inp, size_t len); 147 148 typedef struct gcm128_key_st { 149 // Note the MOVBE-based, x86-64, GHASH assembly requires |H| and |Htable| to 150 // be the first two elements of this struct. Additionally, some assembly 151 // routines require a 16-byte-aligned |Htable| when hashing data, but not 152 // initialization. |GCM128_KEY| is not itself aligned to simplify embedding in 153 // |EVP_AEAD_CTX|, but |Htable|'s offset must be a multiple of 16. 154 u128 H; 155 u128 Htable[16]; 156 gmult_func gmult; 157 ghash_func ghash; 158 159 block128_f block; 160 161 // use_aesni_gcm_crypt is true if this context should use the assembly 162 // functions |aesni_gcm_encrypt| and |aesni_gcm_decrypt| to process data. 163 unsigned use_aesni_gcm_crypt:1; 164 } GCM128_KEY; 165 166 // GCM128_CONTEXT contains state for a single GCM operation. The structure 167 // should be zero-initialized before use. 168 typedef struct { 169 // The following 5 names follow names in GCM specification 170 union { 171 uint64_t u[2]; 172 uint32_t d[4]; 173 uint8_t c[16]; 174 size_t t[16 / sizeof(size_t)]; 175 } Yi, EKi, EK0, len, Xi; 176 177 // Note that the order of |Xi| and |gcm_key| is fixed by the MOVBE-based, 178 // x86-64, GHASH assembly. Additionally, some assembly routines require 179 // |gcm_key| to be 16-byte aligned. |GCM128_KEY| is not itself aligned to 180 // simplify embedding in |EVP_AEAD_CTX|. 181 alignas(16) GCM128_KEY gcm_key; 182 183 unsigned mres, ares; 184 } GCM128_CONTEXT; 185 186 #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64) 187 // crypto_gcm_clmul_enabled returns one if the CLMUL implementation of GCM is 188 // used. 189 int crypto_gcm_clmul_enabled(void); 190 #endif 191 192 // CRYPTO_ghash_init writes a precomputed table of powers of |gcm_key| to 193 // |out_table| and sets |*out_mult| and |*out_hash| to (potentially hardware 194 // accelerated) functions for performing operations in the GHASH field. If the 195 // AVX implementation was used |*out_is_avx| will be true. 196 void CRYPTO_ghash_init(gmult_func *out_mult, ghash_func *out_hash, 197 u128 *out_key, u128 out_table[16], int *out_is_avx, 198 const uint8_t gcm_key[16]); 199 200 // CRYPTO_gcm128_init_key initialises |gcm_key| to use |block| (typically AES) 201 // with the given key. |block_is_hwaes| is one if |block| is |aes_hw_encrypt|. 202 OPENSSL_EXPORT void CRYPTO_gcm128_init_key(GCM128_KEY *gcm_key, 203 const AES_KEY *key, block128_f block, 204 int block_is_hwaes); 205 206 // CRYPTO_gcm128_setiv sets the IV (nonce) for |ctx|. The |key| must be the 207 // same key that was passed to |CRYPTO_gcm128_init|. 208 OPENSSL_EXPORT void CRYPTO_gcm128_setiv(GCM128_CONTEXT *ctx, const AES_KEY *key, 209 const uint8_t *iv, size_t iv_len); 210 211 // CRYPTO_gcm128_aad sets the authenticated data for an instance of GCM. 212 // This must be called before and data is encrypted. It returns one on success 213 // and zero otherwise. 214 OPENSSL_EXPORT int CRYPTO_gcm128_aad(GCM128_CONTEXT *ctx, const uint8_t *aad, 215 size_t len); 216 217 // CRYPTO_gcm128_encrypt encrypts |len| bytes from |in| to |out|. The |key| 218 // must be the same key that was passed to |CRYPTO_gcm128_init|. It returns one 219 // on success and zero otherwise. 220 OPENSSL_EXPORT int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx, 221 const AES_KEY *key, const uint8_t *in, 222 uint8_t *out, size_t len); 223 224 // CRYPTO_gcm128_decrypt decrypts |len| bytes from |in| to |out|. The |key| 225 // must be the same key that was passed to |CRYPTO_gcm128_init|. It returns one 226 // on success and zero otherwise. 227 OPENSSL_EXPORT int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx, 228 const AES_KEY *key, const uint8_t *in, 229 uint8_t *out, size_t len); 230 231 // CRYPTO_gcm128_encrypt_ctr32 encrypts |len| bytes from |in| to |out| using 232 // a CTR function that only handles the bottom 32 bits of the nonce, like 233 // |CRYPTO_ctr128_encrypt_ctr32|. The |key| must be the same key that was 234 // passed to |CRYPTO_gcm128_init|. It returns one on success and zero 235 // otherwise. 236 OPENSSL_EXPORT int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx, 237 const AES_KEY *key, 238 const uint8_t *in, uint8_t *out, 239 size_t len, ctr128_f stream); 240 241 // CRYPTO_gcm128_decrypt_ctr32 decrypts |len| bytes from |in| to |out| using 242 // a CTR function that only handles the bottom 32 bits of the nonce, like 243 // |CRYPTO_ctr128_encrypt_ctr32|. The |key| must be the same key that was 244 // passed to |CRYPTO_gcm128_init|. It returns one on success and zero 245 // otherwise. 246 OPENSSL_EXPORT int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx, 247 const AES_KEY *key, 248 const uint8_t *in, uint8_t *out, 249 size_t len, ctr128_f stream); 250 251 // CRYPTO_gcm128_finish calculates the authenticator and compares it against 252 // |len| bytes of |tag|. It returns one on success and zero otherwise. 253 OPENSSL_EXPORT int CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx, const uint8_t *tag, 254 size_t len); 255 256 // CRYPTO_gcm128_tag calculates the authenticator and copies it into |tag|. 257 // The minimum of |len| and 16 bytes are copied into |tag|. 258 OPENSSL_EXPORT void CRYPTO_gcm128_tag(GCM128_CONTEXT *ctx, uint8_t *tag, 259 size_t len); 260 261 262 // GCM assembly. 263 264 #if !defined(OPENSSL_NO_ASM) && \ 265 (defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || \ 266 defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64) || \ 267 defined(OPENSSL_PPC64LE)) 268 #define GHASH_ASM 269 #endif 270 271 void gcm_init_4bit(u128 Htable[16], const uint64_t H[2]); 272 void gcm_gmult_4bit(uint64_t Xi[2], const u128 Htable[16]); 273 void gcm_ghash_4bit(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp, 274 size_t len); 275 276 #if defined(GHASH_ASM) 277 278 #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64) 279 #define GCM_FUNCREF_4BIT 280 void gcm_init_clmul(u128 Htable[16], const uint64_t Xi[2]); 281 void gcm_gmult_clmul(uint64_t Xi[2], const u128 Htable[16]); 282 void gcm_ghash_clmul(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp, 283 size_t len); 284 285 OPENSSL_INLINE char gcm_ssse3_capable(void) { 286 return (OPENSSL_ia32cap_get()[1] & (1 << (41 - 32))) != 0; 287 } 288 289 // |gcm_gmult_ssse3| and |gcm_ghash_ssse3| require |Htable| to be 290 // 16-byte-aligned, but |gcm_init_ssse3| does not. 291 void gcm_init_ssse3(u128 Htable[16], const uint64_t Xi[2]); 292 void gcm_gmult_ssse3(uint64_t Xi[2], const u128 Htable[16]); 293 void gcm_ghash_ssse3(uint64_t Xi[2], const u128 Htable[16], const uint8_t *in, 294 size_t len); 295 296 #if defined(OPENSSL_X86_64) 297 #define GHASH_ASM_X86_64 298 void gcm_init_avx(u128 Htable[16], const uint64_t Xi[2]); 299 void gcm_gmult_avx(uint64_t Xi[2], const u128 Htable[16]); 300 void gcm_ghash_avx(uint64_t Xi[2], const u128 Htable[16], const uint8_t *in, 301 size_t len); 302 303 #define AESNI_GCM 304 size_t aesni_gcm_encrypt(const uint8_t *in, uint8_t *out, size_t len, 305 const AES_KEY *key, uint8_t ivec[16], uint64_t *Xi); 306 size_t aesni_gcm_decrypt(const uint8_t *in, uint8_t *out, size_t len, 307 const AES_KEY *key, uint8_t ivec[16], uint64_t *Xi); 308 #endif // OPENSSL_X86_64 309 310 #if defined(OPENSSL_X86) 311 #define GHASH_ASM_X86 312 void gcm_gmult_4bit_mmx(uint64_t Xi[2], const u128 Htable[16]); 313 void gcm_ghash_4bit_mmx(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp, 314 size_t len); 315 #endif // OPENSSL_X86 316 317 #elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64) 318 #define GHASH_ASM_ARM 319 #define GCM_FUNCREF_4BIT 320 321 OPENSSL_INLINE int gcm_pmull_capable(void) { 322 return CRYPTO_is_ARMv8_PMULL_capable(); 323 } 324 325 void gcm_init_v8(u128 Htable[16], const uint64_t Xi[2]); 326 void gcm_gmult_v8(uint64_t Xi[2], const u128 Htable[16]); 327 void gcm_ghash_v8(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp, 328 size_t len); 329 330 OPENSSL_INLINE int gcm_neon_capable(void) { return CRYPTO_is_NEON_capable(); } 331 332 void gcm_init_neon(u128 Htable[16], const uint64_t Xi[2]); 333 void gcm_gmult_neon(uint64_t Xi[2], const u128 Htable[16]); 334 void gcm_ghash_neon(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp, 335 size_t len); 336 337 #elif defined(OPENSSL_PPC64LE) 338 #define GHASH_ASM_PPC64LE 339 #define GCM_FUNCREF_4BIT 340 void gcm_init_p8(u128 Htable[16], const uint64_t Xi[2]); 341 void gcm_gmult_p8(uint64_t Xi[2], const u128 Htable[16]); 342 void gcm_ghash_p8(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp, 343 size_t len); 344 #endif 345 #endif // GHASH_ASM 346 347 348 // CCM. 349 350 typedef struct ccm128_context { 351 block128_f block; 352 ctr128_f ctr; 353 unsigned M, L; 354 } CCM128_CONTEXT; 355 356 // CRYPTO_ccm128_init initialises |ctx| to use |block| (typically AES) with the 357 // specified |M| and |L| parameters. It returns one on success and zero if |M| 358 // or |L| is invalid. 359 int CRYPTO_ccm128_init(CCM128_CONTEXT *ctx, const AES_KEY *key, 360 block128_f block, ctr128_f ctr, unsigned M, unsigned L); 361 362 // CRYPTO_ccm128_max_input returns the maximum input length accepted by |ctx|. 363 size_t CRYPTO_ccm128_max_input(const CCM128_CONTEXT *ctx); 364 365 // CRYPTO_ccm128_encrypt encrypts |len| bytes from |in| to |out| writing the tag 366 // to |out_tag|. |key| must be the same key that was passed to 367 // |CRYPTO_ccm128_init|. It returns one on success and zero otherwise. 368 int CRYPTO_ccm128_encrypt(const CCM128_CONTEXT *ctx, const AES_KEY *key, 369 uint8_t *out, uint8_t *out_tag, size_t tag_len, 370 const uint8_t *nonce, size_t nonce_len, 371 const uint8_t *in, size_t len, const uint8_t *aad, 372 size_t aad_len); 373 374 // CRYPTO_ccm128_decrypt decrypts |len| bytes from |in| to |out|, writing the 375 // expected tag to |out_tag|. |key| must be the same key that was passed to 376 // |CRYPTO_ccm128_init|. It returns one on success and zero otherwise. 377 int CRYPTO_ccm128_decrypt(const CCM128_CONTEXT *ctx, const AES_KEY *key, 378 uint8_t *out, uint8_t *out_tag, size_t tag_len, 379 const uint8_t *nonce, size_t nonce_len, 380 const uint8_t *in, size_t len, const uint8_t *aad, 381 size_t aad_len); 382 383 384 // CBC. 385 386 // cbc128_f is the type of a function that performs CBC-mode encryption. 387 typedef void (*cbc128_f)(const uint8_t *in, uint8_t *out, size_t len, 388 const AES_KEY *key, uint8_t ivec[16], int enc); 389 390 // CRYPTO_cbc128_encrypt encrypts |len| bytes from |in| to |out| using the 391 // given IV and block cipher in CBC mode. The input need not be a multiple of 392 // 128 bits long, but the output will round up to the nearest 128 bit multiple, 393 // zero padding the input if needed. The IV will be updated on return. 394 void CRYPTO_cbc128_encrypt(const uint8_t *in, uint8_t *out, size_t len, 395 const AES_KEY *key, uint8_t ivec[16], 396 block128_f block); 397 398 // CRYPTO_cbc128_decrypt decrypts |len| bytes from |in| to |out| using the 399 // given IV and block cipher in CBC mode. If |len| is not a multiple of 128 400 // bits then only that many bytes will be written, but a multiple of 128 bits 401 // is always read from |in|. The IV will be updated on return. 402 void CRYPTO_cbc128_decrypt(const uint8_t *in, uint8_t *out, size_t len, 403 const AES_KEY *key, uint8_t ivec[16], 404 block128_f block); 405 406 407 // OFB. 408 409 // CRYPTO_ofb128_encrypt encrypts (or decrypts, it's the same with OFB mode) 410 // |len| bytes from |in| to |out| using |block| in OFB mode. There's no 411 // requirement that |len| be a multiple of any value and any partial blocks are 412 // stored in |ivec| and |*num|, the latter must be zero before the initial 413 // call. 414 void CRYPTO_ofb128_encrypt(const uint8_t *in, uint8_t *out, size_t len, 415 const AES_KEY *key, uint8_t ivec[16], unsigned *num, 416 block128_f block); 417 418 419 // CFB. 420 421 // CRYPTO_cfb128_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes 422 // from |in| to |out| using |block| in CFB mode. There's no requirement that 423 // |len| be a multiple of any value and any partial blocks are stored in |ivec| 424 // and |*num|, the latter must be zero before the initial call. 425 void CRYPTO_cfb128_encrypt(const uint8_t *in, uint8_t *out, size_t len, 426 const AES_KEY *key, uint8_t ivec[16], unsigned *num, 427 int enc, block128_f block); 428 429 // CRYPTO_cfb128_8_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes 430 // from |in| to |out| using |block| in CFB-8 mode. Prior to the first call 431 // |num| should be set to zero. 432 void CRYPTO_cfb128_8_encrypt(const uint8_t *in, uint8_t *out, size_t len, 433 const AES_KEY *key, uint8_t ivec[16], 434 unsigned *num, int enc, block128_f block); 435 436 // CRYPTO_cfb128_1_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes 437 // from |in| to |out| using |block| in CFB-1 mode. Prior to the first call 438 // |num| should be set to zero. 439 void CRYPTO_cfb128_1_encrypt(const uint8_t *in, uint8_t *out, size_t bits, 440 const AES_KEY *key, uint8_t ivec[16], 441 unsigned *num, int enc, block128_f block); 442 443 size_t CRYPTO_cts128_encrypt_block(const uint8_t *in, uint8_t *out, size_t len, 444 const AES_KEY *key, uint8_t ivec[16], 445 block128_f block); 446 447 448 // POLYVAL. 449 // 450 // POLYVAL is a polynomial authenticator that operates over a field very 451 // similar to the one that GHASH uses. See 452 // https://tools.ietf.org/html/draft-irtf-cfrg-gcmsiv-02#section-3. 453 454 typedef union { 455 uint64_t u[2]; 456 uint8_t c[16]; 457 } polyval_block; 458 459 struct polyval_ctx { 460 // Note that the order of |S|, |H| and |Htable| is fixed by the MOVBE-based, 461 // x86-64, GHASH assembly. Additionally, some assembly routines require 462 // |Htable| to be 16-byte aligned. 463 polyval_block S; 464 u128 H; 465 alignas(16) u128 Htable[16]; 466 gmult_func gmult; 467 ghash_func ghash; 468 }; 469 470 // CRYPTO_POLYVAL_init initialises |ctx| using |key|. 471 void CRYPTO_POLYVAL_init(struct polyval_ctx *ctx, const uint8_t key[16]); 472 473 // CRYPTO_POLYVAL_update_blocks updates the accumulator in |ctx| given the 474 // blocks from |in|. Only a whole number of blocks can be processed so |in_len| 475 // must be a multiple of 16. 476 void CRYPTO_POLYVAL_update_blocks(struct polyval_ctx *ctx, const uint8_t *in, 477 size_t in_len); 478 479 // CRYPTO_POLYVAL_finish writes the accumulator from |ctx| to |out|. 480 void CRYPTO_POLYVAL_finish(const struct polyval_ctx *ctx, uint8_t out[16]); 481 482 483 #if defined(__cplusplus) 484 } // extern C 485 #endif 486 487 #endif // OPENSSL_HEADER_MODES_INTERNAL_H 488
