+ if (generator == NULL)
+ {
+ ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER);
+ return 0 ;
+ }
+
+ if (group->generator == NULL)
+ {
+ group->generator = EC_POINT_new(group);
+ if (group->generator == NULL) return 0;
+ }
+ if (!EC_POINT_copy(group->generator, generator)) return 0;
+
+ if (order != NULL)
+ { if (!BN_copy(&group->order, order)) return 0; }
+ else
+ BN_zero(&group->order);
+
+ if (cofactor != NULL)
+ { if (!BN_copy(&group->cofactor, cofactor)) return 0; }
+ else
+ BN_zero(&group->cofactor);
+
+ return 1;
+ }
+
+
+const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group)
+ {
+ return group->generator;
+ }
+
+
+int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx)
+ {
+ if (!BN_copy(order, &group->order))
+ return 0;
+
+ return !BN_is_zero(order);
+ }
+
+
+int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx)
+ {
+ if (!BN_copy(cofactor, &group->cofactor))
+ return 0;
+
+ return !BN_is_zero(&group->cofactor);
+ }
+
+
+void EC_GROUP_set_curve_name(EC_GROUP *group, int nid)
+ {
+ group->curve_name = nid;
+ }
+
+
+int EC_GROUP_get_curve_name(const EC_GROUP *group)
+ {
+ return group->curve_name;
+ }
+
+
+void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag)
+ {
+ group->asn1_flag = flag;
+ }
+
+
+int EC_GROUP_get_asn1_flag(const EC_GROUP *group)
+ {
+ return group->asn1_flag;
+ }
+
+
+void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
+ point_conversion_form_t form)
+ {
+ group->asn1_form = form;
+ }
+
+
+point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *group)
+ {
+ return group->asn1_form;
+ }
+
+
+size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len)
+ {
+ if (group->seed)
+ {
+ OPENSSL_free(group->seed);
+ group->seed = NULL;
+ group->seed_len = 0;
+ }
+
+ if (!len || !p)
+ return 1;
+
+ if ((group->seed = OPENSSL_malloc(len)) == NULL)
+ return 0;
+ memcpy(group->seed, p, len);
+ group->seed_len = len;
+
+ return len;
+ }
+
+
+unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group)
+ {
+ return group->seed;
+ }
+
+
+size_t EC_GROUP_get_seed_len(const EC_GROUP *group)
+ {
+ return group->seed_len;
+ }
+
+
+int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
+ {
+ if (group->meth->group_set_curve == 0)
+ {
+ ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ return group->meth->group_set_curve(group, p, a, b, ctx);
+ }
+
+
+int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx)
+ {
+ if (group->meth->group_get_curve == 0)
+ {
+ ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ return group->meth->group_get_curve(group, p, a, b, ctx);
+ }
+
+#ifndef OPENSSL_NO_EC2M
+int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
+ {
+ if (group->meth->group_set_curve == 0)
+ {
+ ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ return group->meth->group_set_curve(group, p, a, b, ctx);
+ }
+
+
+int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx)
+ {
+ if (group->meth->group_get_curve == 0)
+ {
+ ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ return group->meth->group_get_curve(group, p, a, b, ctx);
+ }
+#endif
+
+int EC_GROUP_get_degree(const EC_GROUP *group)
+ {
+ if (group->meth->group_get_degree == 0)
+ {
+ ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ return group->meth->group_get_degree(group);
+ }
+
+
+int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx)
+ {
+ if (group->meth->group_check_discriminant == 0)
+ {
+ ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ return group->meth->group_check_discriminant(group, ctx);
+ }
+
+
+int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx)
+ {
+ int r = 0;
+ BIGNUM *a1, *a2, *a3, *b1, *b2, *b3;
+ BN_CTX *ctx_new = NULL;
+
+ /* compare the field types*/
+ if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) !=
+ EC_METHOD_get_field_type(EC_GROUP_method_of(b)))
+ return 1;
+ /* compare the curve name (if present) */
+ if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) &&
+ EC_GROUP_get_curve_name(a) == EC_GROUP_get_curve_name(b))
+ return 0;
+
+ if (!ctx)
+ ctx_new = ctx = BN_CTX_new();
+ if (!ctx)
+ return -1;
+
+ BN_CTX_start(ctx);
+ a1 = BN_CTX_get(ctx);
+ a2 = BN_CTX_get(ctx);
+ a3 = BN_CTX_get(ctx);
+ b1 = BN_CTX_get(ctx);
+ b2 = BN_CTX_get(ctx);
+ b3 = BN_CTX_get(ctx);
+ if (!b3)
+ {
+ BN_CTX_end(ctx);
+ if (ctx_new)
+ BN_CTX_free(ctx);
+ return -1;
+ }
+
+ /* XXX This approach assumes that the external representation
+ * of curves over the same field type is the same.
+ */
+ if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) ||
+ !b->meth->group_get_curve(b, b1, b2, b3, ctx))
+ r = 1;
+
+ if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3))
+ r = 1;
+
+ /* XXX EC_POINT_cmp() assumes that the methods are equal */
+ if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a),
+ EC_GROUP_get0_generator(b), ctx))
+ r = 1;
+
+ if (!r)