78 rivejä
3.4 KiB
C
78 rivejä
3.4 KiB
C
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/*
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* This code is based on an OpenSSL implementation of chacha20.
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* Hence, the copyright below applies.
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*
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*/
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/* ====================================================================
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* Copyright (c) 2011-2013 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
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#ifndef CHACHA_H
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#define CHACHA_H
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#include <stddef.h>
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typedef unsigned int uint32_t;
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/* CRYPTO_chacha_20 encrypts |in_len| bytes from |in| with the given key and
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* nonce and writes the result to |out|, which may be equal to |in|. The
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* initial block counter is specified by |counter|. */
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void CRYPTO_chacha_20(unsigned char *out,
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const unsigned char *in, size_t in_len,
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const unsigned char key[32],
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const unsigned char nonce[12],
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uint32_t counter);
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/* CRYPTO_chacha_20_keystream generates |out_len| bytes from the generated keystream with the given key and
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* nonce and writes the result to |out|. The
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* initial block counter is specified by |counter|. */
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void CRYPTO_chacha_20_keystream(unsigned char *out,
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size_t out_len,
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const unsigned char key[32],
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const unsigned char nonce[12],
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uint32_t counter);
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#endif
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