2015-09-28 17:46:17 +02:00
|
|
|
#ifndef _SECP256K1_ECDH_
|
|
|
|
|
# define _SECP256K1_ECDH_
|
|
|
|
|
|
|
|
|
|
# include "secp256k1.h"
|
|
|
|
|
|
|
|
|
|
# ifdef __cplusplus
|
|
|
|
|
extern "C" {
|
|
|
|
|
# endif
|
|
|
|
|
|
|
|
|
|
/** Compute an EC Diffie-Hellman secret in constant time
|
|
|
|
|
* Returns: 1: exponentiation was successful
|
|
|
|
|
* 0: scalar was invalid (zero or overflow)
|
2017-01-12 21:29:11 +01:00
|
|
|
* Args: ctx: pointer to a context object (cannot be NULL)
|
|
|
|
|
* Out: result: a 32-byte array which will be populated by an ECDH
|
|
|
|
|
* secret computed from the point and scalar
|
|
|
|
|
* In: pubkey: a pointer to a secp256k1_pubkey containing an
|
|
|
|
|
* initialized public key
|
|
|
|
|
* privkey: a 32-byte scalar with which to multiply the point
|
2015-09-28 17:46:17 +02:00
|
|
|
*/
|
|
|
|
|
SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ecdh(
|
|
|
|
|
const secp256k1_context* ctx,
|
|
|
|
|
unsigned char *result,
|
2017-01-12 21:29:11 +01:00
|
|
|
const secp256k1_pubkey *pubkey,
|
|
|
|
|
const unsigned char *privkey
|
2015-09-28 17:46:17 +02:00
|
|
|
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4);
|
|
|
|
|
|
|
|
|
|
# ifdef __cplusplus
|
|
|
|
|
}
|
|
|
|
|
# endif
|
|
|
|
|
|
|
|
|
|
#endif
|
