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Directory :  /usr/include/sodium/

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Current File : /usr/include/sodium/crypto_stream_xchacha20.h
#ifndef crypto_stream_xchacha20_H
#define crypto_stream_xchacha20_H

/*
 *  WARNING: This is just a stream cipher. It is NOT authenticated encryption.
 *  While it provides some protection against eavesdropping, it does NOT
 *  provide any security against active attacks.
 *  Unless you know what you're doing, what you are looking for is probably
 *  the crypto_box functions.
 */

#include <stddef.h>
#include <stdint.h>
#include "export.h"

#ifdef __cplusplus
# ifdef __GNUC__
#  pragma GCC diagnostic ignored "-Wlong-long"
# endif
extern "C" {
#endif

#define crypto_stream_xchacha20_KEYBYTES 32U
SODIUM_EXPORT
size_t crypto_stream_xchacha20_keybytes(void);

#define crypto_stream_xchacha20_NONCEBYTES 24U
SODIUM_EXPORT
size_t crypto_stream_xchacha20_noncebytes(void);

#define crypto_stream_xchacha20_MESSAGEBYTES_MAX SODIUM_SIZE_MAX
SODIUM_EXPORT
size_t crypto_stream_xchacha20_messagebytes_max(void);

SODIUM_EXPORT
int crypto_stream_xchacha20(unsigned char *c, unsigned long long clen,
                            const unsigned char *n, const unsigned char *k)
            __attribute__ ((nonnull));

SODIUM_EXPORT
int crypto_stream_xchacha20_xor(unsigned char *c, const unsigned char *m,
                                unsigned long long mlen, const unsigned char *n,
                                const unsigned char *k)
            __attribute__ ((nonnull(1, 4, 5)));

SODIUM_EXPORT
int crypto_stream_xchacha20_xor_ic(unsigned char *c, const unsigned char *m,
                                   unsigned long long mlen,
                                   const unsigned char *n, uint64_t ic,
                                   const unsigned char *k)
            __attribute__ ((nonnull(1, 4, 6)));

SODIUM_EXPORT
void crypto_stream_xchacha20_keygen(unsigned char k[crypto_stream_xchacha20_KEYBYTES])
            __attribute__ ((nonnull));

#ifdef __cplusplus
}
#endif

#endif

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