#include <stdio.h>
#include <openssl/dh.h>

int main (int argc, const char * argv[]) {

	DH *dh1;
	int i;
	unsigned char *key1;
	BIGNUM *Y;
	FILE *filep, *filex, *filey;
	char Ys[1000];
	
	dh1=DH_generate_parameters(1024,2,NULL,NULL);

	DHparams_print_fp(stdout, dh1);	
	
	if (!DH_generate_key(dh1))
		printf("Erro a gerar chave privada 1\n");
		
	filep=fopen("p.dat","w");
	fprintf(filep,"%s",BN_bn2hex(dh1->p));
	fclose(filep);

	filex=fopen("x.dat","w");
	fprintf(filex,"%s",BN_bn2hex(dh1->pub_key));
	fclose(filex);

	printf("Estou à espera! ...");
	scanf("%d",&i);
	
	filey=fopen("y.dat","r");
	fgets(Ys,1000,filey);
	BN_hex2bn(&Y, Ys);
	
	key1 = (unsigned char *)malloc(DH_size(dh1));

	if (! DH_compute_key(key1,Y,dh1))
		printf("Erro a gerar chave secreta 1\n");
	
	for(i=0; i<DH_size(dh1); i++) {
			printf("%d,",key1[i]);
	}
	printf("\n");

    return 0;
}