#include "include/secp256k1_ecdh.h"
#include "ecmult_const_impl.h"

Functions
static int	ecdh_hash_function_sha256 (unsigned char output, const unsigned char x, const unsigned char y, void data)

int	secp256k1_ecdh (const secp256k1_context ctx, unsigned char output, const secp256k1_pubkey point, const unsigned char scalar, secp256k1_ecdh_hash_function hashfp, void *data)

Variables
const secp256k1_ecdh_hash_function	secp256k1_ecdh_hash_function_sha256 = ecdh_hash_function_sha256

const secp256k1_ecdh_hash_function	secp256k1_ecdh_hash_function_default = ecdh_hash_function_sha256

Function Documentation

◆ ecdh_hash_function_sha256()

static int ecdh_hash_function_sha256	(	unsigned char *	output,
		const unsigned char *	x,
		const unsigned char *	y,
		void *	data
	)

static

◆ secp256k1_ecdh()

int secp256k1_ecdh	(	const secp256k1_context *	ctx,
		unsigned char *	output,
		const secp256k1_pubkey *	pubkey,
		const unsigned char *	privkey,
		secp256k1_ecdh_hash_function	hashfp,
		void *	data
	)

Compute an EC Diffie-Hellman secret in constant time Returns: 1: exponentiation was successful 0: scalar was invalid (zero or overflow) Args: ctx: pointer to a context object (cannot be NULL) Out: output: pointer to an array to be filled by the function In: pubkey: a pointer to a secp256k1_pubkey containing an initialized public key privkey: a 32-byte scalar with which to multiply the point hashfp: pointer to a hash function. If NULL, secp256k1_ecdh_hash_function_sha256 is used data: Arbitrary data pointer that is passed through

Variable Documentation

◆ secp256k1_ecdh_hash_function_default

const secp256k1_ecdh_hash_function secp256k1_ecdh_hash_function_default = ecdh_hash_function_sha256

A default ecdh hash function (currently equal to secp256k1_ecdh_hash_function_sha256).

◆ secp256k1_ecdh_hash_function_sha256

const secp256k1_ecdh_hash_function secp256k1_ecdh_hash_function_sha256 = ecdh_hash_function_sha256

An implementation of SHA256 hash function that applies to compressed public key.