1 /* ====================================================================
2 * Copyright (c) 2011-2013 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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
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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/)"
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27 * nor may "OpenSSL" appear in their names without prior written
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32 * "This product includes software developed by the OpenSSL Project
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36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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47 * ====================================================================
49 #ifndef HEADER_CHACHA_H
50 #define HEADER_CHACHA_H
52 #include <openssl/opensslconf.h>
54 #if defined(OPENSSL_NO_CHACHA)
55 #error ChaCha support is disabled.
64 /* CRYPTO_chacha_20 encrypts |in_len| bytes from |in| with the given key and
65 * nonce and writes the result to |out|, which may be equal to |in|. The
66 * initial block counter is specified by |counter|. */
67 void CRYPTO_chacha_20(unsigned char *out,
68 const unsigned char *in, size_t in_len,
69 const unsigned char key[32],
70 const unsigned char nonce[8],