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crypto_scalarmult_curve25519.h (1098B)

      1 #ifndef crypto_scalarmult_curve25519_H
      2 #define crypto_scalarmult_curve25519_H
      3 
      4 #include <stddef.h>
      5 
      6 #include "export.h"
      7 
      8 #ifdef __cplusplus
      9 extern "C" {
     10 #endif
     11 
     12 #define crypto_scalarmult_curve25519_BYTES 32U
     13 SODIUM_EXPORT
     14 size_t crypto_scalarmult_curve25519_bytes(void);
     15 
     16 #define crypto_scalarmult_curve25519_SCALARBYTES 32U
     17 SODIUM_EXPORT
     18 size_t crypto_scalarmult_curve25519_scalarbytes(void);
     19 
     20 /*
     21  * NOTE: Do not use the result of this function directly for key exchange.
     22  *
     23  * Hash the result with the public keys in order to compute a shared
     24  * secret key: H(q || client_pk || server_pk)
     25  *
     26  * Or unless this is not an option, use the crypto_kx() API instead.
     27  */
     28 SODIUM_EXPORT
     29 int crypto_scalarmult_curve25519(unsigned char *q, const unsigned char *n,
     30                                  const unsigned char *p)
     31             __attribute__ ((warn_unused_result)) __attribute__ ((nonnull));
     32 
     33 SODIUM_EXPORT
     34 int crypto_scalarmult_curve25519_base(unsigned char *q,
     35                                       const unsigned char *n)
     36             __attribute__ ((nonnull));
     37 
     38 #ifdef __cplusplus
     39 }
     40 #endif
     41 
     42 #endif