62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
#ifndef crypto_stream_xchacha20_H
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#define crypto_stream_xchacha20_H
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/*
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* WARNING: This is just a stream cipher. It is NOT authenticated encryption.
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* While it provides some protection against eavesdropping, it does NOT
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* provide any security against active attacks.
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* Unless you know what you're doing, what you are looking for is probably
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* the crypto_box functions.
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include "export.h"
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#ifdef __cplusplus
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# ifdef __GNUC__
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# pragma GCC diagnostic ignored "-Wlong-long"
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# endif
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extern "C" {
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#endif
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#define crypto_stream_xchacha20_KEYBYTES 32U
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SODIUM_EXPORT
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size_t crypto_stream_xchacha20_keybytes(void);
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#define crypto_stream_xchacha20_NONCEBYTES 24U
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SODIUM_EXPORT
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size_t crypto_stream_xchacha20_noncebytes(void);
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#define crypto_stream_xchacha20_MESSAGEBYTES_MAX SODIUM_SIZE_MAX
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SODIUM_EXPORT
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size_t crypto_stream_xchacha20_messagebytes_max(void);
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SODIUM_EXPORT
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int crypto_stream_xchacha20(unsigned char *c, unsigned long long clen,
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const unsigned char *n, const unsigned char *k)
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__attribute__ ((nonnull));
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SODIUM_EXPORT
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int crypto_stream_xchacha20_xor(unsigned char *c, const unsigned char *m,
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unsigned long long mlen, const unsigned char *n,
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const unsigned char *k)
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__attribute__ ((nonnull));
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SODIUM_EXPORT
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int crypto_stream_xchacha20_xor_ic(unsigned char *c, const unsigned char *m,
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unsigned long long mlen,
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const unsigned char *n, uint64_t ic,
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const unsigned char *k)
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__attribute__ ((nonnull));
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SODIUM_EXPORT
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void crypto_stream_xchacha20_keygen(unsigned char k[crypto_stream_xchacha20_KEYBYTES])
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__attribute__ ((nonnull));
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#ifdef __cplusplus
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}
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#endif
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#endif
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