libsodium (1.0.19)

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crypto_scalarmult_curve25519.h
       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