doc/dev/secp256k1__ecdh_8h_source.html

#ifndef SECP256K1_ECDH_H

#define SECP256K1_ECDH_H


#include "secp256k1.h"


#ifdef __cplusplus

extern "C" {

#endif


typedef int (*secp256k1_ecdh_hash_function)(

  unsigned char *output,

  const unsigned char *x32,

  const unsigned char *y32,

  void *data

);


SECP256K1_API extern const secp256k1_ecdh_hash_function secp256k1_ecdh_hash_function_sha256;


SECP256K1_API extern const secp256k1_ecdh_hash_function secp256k1_ecdh_hash_function_default;


SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ecdh(

  const secp256k1_context* ctx,

  unsigned char *output,

  const secp256k1_pubkey *pubkey,

  const unsigned char *seckey,

  secp256k1_ecdh_hash_function hashfp,

  void *data

) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4);


#ifdef __cplusplus

}

#endif


#endif /* SECP256K1_ECDH_H */

ctx
secp256k1_context * ctx
Definition: bench_multiset.c:12

secp256k1.h

SECP256K1_ARG_NONNULL
#define SECP256K1_ARG_NONNULL(_x)
Definition: secp256k1.h:158

SECP256K1_API
#define SECP256K1_API
Definition: secp256k1.h:143

SECP256K1_WARN_UNUSED_RESULT
#define SECP256K1_WARN_UNUSED_RESULT
Warning attributes NONNULL is not used if SECP256K1_BUILD is set to avoid the compiler optimizing out...
Definition: secp256k1.h:153

secp256k1_ecdh
SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ecdh(const secp256k1_context *ctx, unsigned char *output, const secp256k1_pubkey *pubkey, const unsigned char *seckey, secp256k1_ecdh_hash_function hashfp, void *data) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4)
Compute an EC Diffie-Hellman secret in constant time.
Definition: main_impl.h:29

secp256k1_ecdh_hash_function_sha256
SECP256K1_API const secp256k1_ecdh_hash_function secp256k1_ecdh_hash_function_sha256
An implementation of SHA256 hash function that applies to compressed public key.
Definition: main_impl.h:26

secp256k1_ecdh_hash_function
int(* secp256k1_ecdh_hash_function)(unsigned char *output, const unsigned char *x32, const unsigned char *y32, void *data)
A pointer to a function that hashes an EC point to obtain an ECDH secret.
Definition: secp256k1_ecdh.h:21

secp256k1_ecdh_hash_function_default
SECP256K1_API const secp256k1_ecdh_hash_function secp256k1_ecdh_hash_function_default
A default ECDH hash function (currently equal to secp256k1_ecdh_hash_function_sha256).
Definition: main_impl.h:27

secp256k1_context_struct
Definition: secp256k1.c:69

secp256k1_pubkey
Opaque data structure that holds a parsed and valid public key.
Definition: secp256k1.h:70