libkeccak_state_copy.c


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/* See LICENSE file for copyright and license details. */
#include "common.h"


/**
 * Make a copy of a state
 * 
 * @param   dest  The slot for the duplicate, must not be initialised (memory leak otherwise)
 * @param   src   The state to duplicate
 * @return        Zero on success, -1 on error
 */
int
libkeccak_state_copy(libkeccak_state_t *restrict dest, const libkeccak_state_t *restrict src)
{
	memcpy(dest, src, sizeof(libkeccak_state_t));
	dest->M = malloc(src->mlen * sizeof(char));
	if (!dest->M)
		return -1;
	memcpy(dest->M, src->M, src->mptr * sizeof(char));
	return 0;
}