1 /* Copyright (c) 2018, Google Inc. 2 * 3 * Permission to use, copy, modify, and/or distribute this software for any 4 * purpose with or without fee is hereby granted, provided that the above 5 * copyright notice and this permission notice appear in all copies. 6 * 7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ 14 15 #ifndef OPENSSL_HEADER_CHACHA_INTERNAL 16 #define OPENSSL_HEADER_CHACHA_INTERNAL 17 18 #include <openssl/base.h> 19 20 #if defined(__cplusplus) 21 extern "C" { 22 #endif 23 24 25 // CRYPTO_hchacha20 computes the HChaCha20 function, which should only be used 26 // as part of XChaCha20. 27 void CRYPTO_hchacha20(uint8_t out[32], const uint8_t key[32], 28 const uint8_t nonce[16]); 29 30 #if !defined(OPENSSL_NO_ASM) && \ 31 (defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || \ 32 defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)) 33 #define CHACHA20_ASM 34 35 // ChaCha20_ctr32 encrypts |in_len| bytes from |in| and writes the result to 36 // |out|. If |in| and |out| alias, they must be equal. 37 // 38 // |counter[0]| is the initial 32-bit block counter, and the remainder is the 39 // 96-bit nonce. If the counter overflows, the output is undefined. The function 40 // will produce output, but the output may vary by machine and may not be 41 // self-consistent. (On some architectures, the assembly implements a mix of 42 // 64-bit and 32-bit counters.) 43 void ChaCha20_ctr32(uint8_t *out, const uint8_t *in, size_t in_len, 44 const uint32_t key[8], const uint32_t counter[4]); 45 #endif 46 47 48 #if defined(__cplusplus) 49 } // extern C 50 #endif 51 52 #endif // OPENSSL_HEADER_CHACHA_INTERNAL 53