/usr/include/sodium/crypto_kx.h is in libsodium-dev 1.0.16-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | #ifndef crypto_kx_H
#define crypto_kx_H
#include <stddef.h>
#include "export.h"
#ifdef __cplusplus
# ifdef __GNUC__
# pragma GCC diagnostic ignored "-Wlong-long"
# endif
extern "C" {
#endif
#define crypto_kx_PUBLICKEYBYTES 32
SODIUM_EXPORT
size_t crypto_kx_publickeybytes(void);
#define crypto_kx_SECRETKEYBYTES 32
SODIUM_EXPORT
size_t crypto_kx_secretkeybytes(void);
#define crypto_kx_SEEDBYTES 32
SODIUM_EXPORT
size_t crypto_kx_seedbytes(void);
#define crypto_kx_SESSIONKEYBYTES 32
SODIUM_EXPORT
size_t crypto_kx_sessionkeybytes(void);
#define crypto_kx_PRIMITIVE "x25519blake2b"
SODIUM_EXPORT
const char *crypto_kx_primitive(void);
SODIUM_EXPORT
int crypto_kx_seed_keypair(unsigned char pk[crypto_kx_PUBLICKEYBYTES],
unsigned char sk[crypto_kx_SECRETKEYBYTES],
const unsigned char seed[crypto_kx_SEEDBYTES]);
SODIUM_EXPORT
int crypto_kx_keypair(unsigned char pk[crypto_kx_PUBLICKEYBYTES],
unsigned char sk[crypto_kx_SECRETKEYBYTES]);
SODIUM_EXPORT
int crypto_kx_client_session_keys(unsigned char rx[crypto_kx_SESSIONKEYBYTES],
unsigned char tx[crypto_kx_SESSIONKEYBYTES],
const unsigned char client_pk[crypto_kx_PUBLICKEYBYTES],
const unsigned char client_sk[crypto_kx_SECRETKEYBYTES],
const unsigned char server_pk[crypto_kx_PUBLICKEYBYTES])
__attribute__ ((warn_unused_result));
SODIUM_EXPORT
int crypto_kx_server_session_keys(unsigned char rx[crypto_kx_SESSIONKEYBYTES],
unsigned char tx[crypto_kx_SESSIONKEYBYTES],
const unsigned char server_pk[crypto_kx_PUBLICKEYBYTES],
const unsigned char server_sk[crypto_kx_SECRETKEYBYTES],
const unsigned char client_pk[crypto_kx_PUBLICKEYBYTES])
__attribute__ ((warn_unused_result));
#ifdef __cplusplus
}
#endif
#endif
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