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author | Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org> | 2021-04-30 00:33:56 +0200 |
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committer | Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org> | 2021-04-30 00:33:56 +0200 |
commit | aa4d426b4d3527d7e166df1a05058c9a4a0f6683 (patch) | |
tree | 4ff17ce8b89a2321b9d0ed4bcfc37c447bcb6820 /openssl-1.1.0h/crypto/include/internal/chacha.h | |
download | smtps-and-pop3s-console-program-master.tar.gz smtps-and-pop3s-console-program-master.zip |
Diffstat (limited to 'openssl-1.1.0h/crypto/include/internal/chacha.h')
-rw-r--r-- | openssl-1.1.0h/crypto/include/internal/chacha.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/include/internal/chacha.h b/openssl-1.1.0h/crypto/include/internal/chacha.h new file mode 100644 index 0000000..7d4366e --- /dev/null +++ b/openssl-1.1.0h/crypto/include/internal/chacha.h @@ -0,0 +1,49 @@ +/* + * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#ifndef HEADER_CHACHA_H +#define HEADER_CHACHA_H + +#include <stddef.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * ChaCha20_ctr32 encrypts |len| bytes from |inp| with the given key and + * nonce and writes the result to |out|, which may be equal to |inp|. + * The |key| is not 32 bytes of verbatim key material though, but the + * said material collected into 8 32-bit elements array in host byte + * order. Same approach applies to nonce: the |counter| argument is + * pointer to concatenated nonce and counter values collected into 4 + * 32-bit elements. This, passing crypto material collected into 32-bit + * elements as opposite to passing verbatim byte vectors, is chosen for + * efficiency in multi-call scenarios. + */ +void ChaCha20_ctr32(unsigned char *out, const unsigned char *inp, + size_t len, const unsigned int key[8], + const unsigned int counter[4]); +/* + * You can notice that there is no key setup procedure. Because it's + * as trivial as collecting bytes into 32-bit elements, it's reckoned + * that below macro is sufficient. + */ +#define CHACHA_U8TOU32(p) ( \ + ((unsigned int)(p)[0]) | ((unsigned int)(p)[1]<<8) | \ + ((unsigned int)(p)[2]<<16) | ((unsigned int)(p)[3]<<24) ) + +#define CHACHA_KEY_SIZE 32 +#define CHACHA_CTR_SIZE 16 +#define CHACHA_BLK_SIZE 64 + +#ifdef __cplusplus +} +#endif +#endif |