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- /* Copyright (c) 2014, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
- #ifndef OPENSSL_HEADER_CHACHA_H
- #define OPENSSL_HEADER_CHACHA_H
- #include <openssl/base.h>
- #if defined(__cplusplus)
- extern "C" {
- #endif
- // ChaCha20.
- //
- // ChaCha20 is a stream cipher. See https://tools.ietf.org/html/rfc8439.
- // CRYPTO_chacha_20 encrypts |in_len| bytes from |in| with the given key and
- // nonce and writes the result to |out|. If |in| and |out| alias, they must be
- // equal. The initial block counter is specified by |counter|.
- OPENSSL_EXPORT void CRYPTO_chacha_20(uint8_t *out, const uint8_t *in,
- size_t in_len, const uint8_t key[32],
- const uint8_t nonce[12], uint32_t counter);
- #if defined(__cplusplus)
- } // extern C
- #endif
- #endif // OPENSSL_HEADER_CHACHA_H
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