1 
2 #ifndef crypto_scalarmult_ed25519_H
3 #define crypto_scalarmult_ed25519_H
4 
5 #include <stddef.h>
6 
7 #include "export.h"
8 
9 #ifdef __cplusplus
10 extern "C" {
11 #endif
12 
13 #define crypto_scalarmult_ed25519_BYTES 32U
14 SODIUM_EXPORT
15 size_t crypto_scalarmult_ed25519_bytes(void);
16 
17 #define crypto_scalarmult_ed25519_SCALARBYTES 32U
18 SODIUM_EXPORT
19 size_t crypto_scalarmult_ed25519_scalarbytes(void);
20 
21 /*
22  * NOTE: Do not use the result of this function directly.
23  *
24  * Hash the result with the public keys in order to compute a shared
25  * secret key: H(q || client_pk || server_pk)
26  *
27  * Or unless this is not an option, use the crypto_kx() API instead.
28  */
29 SODIUM_EXPORT
30 int crypto_scalarmult_ed25519(unsigned char *q, const unsigned char *n,
31                               const unsigned char *p)
32             __attribute__ ((warn_unused_result));
33 
34 SODIUM_EXPORT
35 int crypto_scalarmult_ed25519_base(unsigned char *q, const unsigned char *n);
36 
37 #ifdef __cplusplus
38 }
39 #endif
40 
41 #endif
42