Exemple #1
0
static int openssl_ec_group_parse(lua_State*L)
{
  const EC_GROUP* group = CHECK_OBJECT(1, EC_GROUP, "openssl.ec_group");
  const EC_POINT *generator = EC_GROUP_get0_generator(group);
  BN_CTX* ctx = BN_CTX_new();
  BIGNUM *a, *b, *p, *order, *cofactor;

  lua_newtable(L);
  if (generator)
  {
    generator = EC_POINT_dup(generator, group);
    AUXILIAR_SETOBJECT(L, generator, "openssl.ec_point", -1, "generator");
  }

  order = BN_new();
  EC_GROUP_get_order(group, order, ctx);
  AUXILIAR_SETOBJECT(L, order, "openssl.bn", -1, "order");

  cofactor = BN_new();
  EC_GROUP_get_cofactor(group, cofactor, ctx);
  AUXILIAR_SETOBJECT(L, cofactor, "openssl.bn", -1, "cofactor");

  AUXILIAR_SET(L, -1, "asn1_flag", EC_GROUP_get_asn1_flag(group), integer);
  AUXILIAR_SET(L, -1, "degree", EC_GROUP_get_degree(group), integer);
  AUXILIAR_SET(L, -1, "curve_name", EC_GROUP_get_curve_name(group), integer);
  AUXILIAR_SET(L, -1, "conversion_form", EC_GROUP_get_point_conversion_form(group), integer);

  AUXILIAR_SETLSTR(L, -1, "seed", EC_GROUP_get0_seed(group), EC_GROUP_get_seed_len(group));

  a = BN_new();
  b = BN_new();
  p = BN_new();
  EC_GROUP_get_curve_GFp(group, p, a, b, ctx);
  lua_newtable(L);
  {
    AUXILIAR_SETOBJECT(L, p, "openssl.bn", -1, "p");
    AUXILIAR_SETOBJECT(L, a, "openssl.bn", -1, "a");
    AUXILIAR_SETOBJECT(L, b, "openssl.bn", -1, "b");
  }
  lua_setfield(L, -2, "curve");
  BN_CTX_free(ctx);

  return 1;
}
Exemple #2
0
int 
ECPKParameters_print(BIO * bp, const EC_GROUP * x, int off)
{
	unsigned char *buffer = NULL;
	size_t buf_len = 0, i;
	int ret = 0, reason = ERR_R_BIO_LIB;
	BN_CTX *ctx = NULL;
	const EC_POINT *point = NULL;
	BIGNUM *p = NULL, *a = NULL, *b = NULL, *gen = NULL, *order = NULL,
	*cofactor = NULL;
	const unsigned char *seed;
	size_t seed_len = 0;
	const char *nname;

	static const char *gen_compressed = "Generator (compressed):";
	static const char *gen_uncompressed = "Generator (uncompressed):";
	static const char *gen_hybrid = "Generator (hybrid):";

	if (!x) {
		reason = ERR_R_PASSED_NULL_PARAMETER;
		goto err;
	}
	ctx = BN_CTX_new();
	if (ctx == NULL) {
		reason = ERR_R_MALLOC_FAILURE;
		goto err;
	}
	if (EC_GROUP_get_asn1_flag(x)) {
		/* the curve parameter are given by an asn1 OID */
		int nid;

		if (!BIO_indent(bp, off, 128))
			goto err;

		nid = EC_GROUP_get_curve_name(x);
		if (nid == 0)
			goto err;

		if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
			goto err;
		if (BIO_printf(bp, "\n") <= 0)
			goto err;

		nname = EC_curve_nid2nist(nid);
		if (nname) {
			if (!BIO_indent(bp, off, 128))
				goto err;
			if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0)
				goto err;
		}
	} else {
		/* explicit parameters */
		int is_char_two = 0;
		point_conversion_form_t form;
		int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));

		if (tmp_nid == NID_X9_62_characteristic_two_field)
			is_char_two = 1;

		if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
		    (b = BN_new()) == NULL || (order = BN_new()) == NULL ||
		    (cofactor = BN_new()) == NULL) {
			reason = ERR_R_MALLOC_FAILURE;
			goto err;
		}
#ifndef OPENSSL_NO_EC2M
		if (is_char_two) {
			if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx)) {
				reason = ERR_R_EC_LIB;
				goto err;
			}
		} else		/* prime field */
#endif
		{
			if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx)) {
				reason = ERR_R_EC_LIB;
				goto err;
			}
		}

		if ((point = EC_GROUP_get0_generator(x)) == NULL) {
			reason = ERR_R_EC_LIB;
			goto err;
		}
		if (!EC_GROUP_get_order(x, order, NULL) ||
		    !EC_GROUP_get_cofactor(x, cofactor, NULL)) {
			reason = ERR_R_EC_LIB;
			goto err;
		}
		form = EC_GROUP_get_point_conversion_form(x);

		if ((gen = EC_POINT_point2bn(x, point,
			    form, NULL, ctx)) == NULL) {
			reason = ERR_R_EC_LIB;
			goto err;
		}
		buf_len = (size_t) BN_num_bytes(p);
		if (buf_len < (i = (size_t) BN_num_bytes(a)))
			buf_len = i;
		if (buf_len < (i = (size_t) BN_num_bytes(b)))
			buf_len = i;
		if (buf_len < (i = (size_t) BN_num_bytes(gen)))
			buf_len = i;
		if (buf_len < (i = (size_t) BN_num_bytes(order)))
			buf_len = i;
		if (buf_len < (i = (size_t) BN_num_bytes(cofactor)))
			buf_len = i;

		if ((seed = EC_GROUP_get0_seed(x)) != NULL)
			seed_len = EC_GROUP_get_seed_len(x);

		buf_len += 10;
		if ((buffer = malloc(buf_len)) == NULL) {
			reason = ERR_R_MALLOC_FAILURE;
			goto err;
		}
		if (!BIO_indent(bp, off, 128))
			goto err;

		/* print the 'short name' of the field type */
		if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
		    <= 0)
			goto err;

		if (is_char_two) {
			/* print the 'short name' of the base type OID */
			int basis_type = EC_GROUP_get_basis_type(x);
			if (basis_type == 0)
				goto err;

			if (!BIO_indent(bp, off, 128))
				goto err;

			if (BIO_printf(bp, "Basis Type: %s\n",
				OBJ_nid2sn(basis_type)) <= 0)
				goto err;

			/* print the polynomial */
			if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer,
				off))
				goto err;
		} else {
			if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer, off))
				goto err;
		}
		if ((a != NULL) && !ASN1_bn_print(bp, "A:   ", a, buffer, off))
			goto err;
		if ((b != NULL) && !ASN1_bn_print(bp, "B:   ", b, buffer, off))
			goto err;
		if (form == POINT_CONVERSION_COMPRESSED) {
			if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
				buffer, off))
				goto err;
		} else if (form == POINT_CONVERSION_UNCOMPRESSED) {
			if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
				buffer, off))
				goto err;
		} else {	/* form == POINT_CONVERSION_HYBRID */
			if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
				buffer, off))
				goto err;
		}
		if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
			buffer, off))
			goto err;
		if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
			buffer, off))
			goto err;
		if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
			goto err;
	}
	ret = 1;
err:
	if (!ret)
		ECerror(reason);
	BN_free(p);
	BN_free(a);
	BN_free(b);
	BN_free(gen);
	BN_free(order);
	BN_free(cofactor);
	BN_CTX_free(ctx);
	free(buffer);
	return (ret);
}