--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/security/spec/ECParameterSpec.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package java.security.spec;
+
+import java.math.BigInteger;
+
+/**
+ * This immutable class specifies the set of domain parameters
+ * used with elliptic curve cryptography (ECC).
+ *
+ * @see AlgorithmParameterSpec
+ *
+ * @author Valerie Peng
+ *
+ * @since 1.5
+ */
+public class ECParameterSpec implements AlgorithmParameterSpec {
+
+    private final EllipticCurve curve;
+    private final ECPoint g;
+    private final BigInteger n;
+    private final int h;
+
+    /**
+     * Creates elliptic curve domain parameters based on the
+     * specified values.
+     * @param curve the elliptic curve which this parameter
+     * defines.
+     * @param g the generator which is also known as the base point.
+     * @param n the order of the generator {@code g}.
+     * @param h the cofactor.
+     * @exception NullPointerException if {@code curve},
+     * {@code g}, or {@code n} is null.
+     * @exception IllegalArgumentException if {@code n}
+     * or {@code h} is not positive.
+     */
+    public ECParameterSpec(EllipticCurve curve, ECPoint g,
+                           BigInteger n, int h) {
+        if (curve == null) {
+            throw new NullPointerException("curve is null");
+        }
+        if (g == null) {
+            throw new NullPointerException("g is null");
+        }
+        if (n == null) {
+            throw new NullPointerException("n is null");
+        }
+        if (n.signum() != 1) {
+            throw new IllegalArgumentException("n is not positive");
+        }
+        if (h <= 0) {
+            throw new IllegalArgumentException("h is not positive");
+        }
+        this.curve = curve;
+        this.g = g;
+        this.n = n;
+        this.h = h;
+    }
+
+    /**
+     * Returns the elliptic curve that this parameter defines.
+     * @return the elliptic curve that this parameter defines.
+     */
+    public EllipticCurve getCurve() {
+        return curve;
+    }
+
+    /**
+     * Returns the generator which is also known as the base point.
+     * @return the generator which is also known as the base point.
+     */
+    public ECPoint getGenerator() {
+        return g;
+    }
+
+    /**
+     * Returns the order of the generator.
+     * @return the order of the generator.
+     */
+    public BigInteger getOrder() {
+        return n;
+    }
+
+    /**
+     * Returns the cofactor.
+     * @return the cofactor.
+     */
+    public int getCofactor() {
+        return h;
+    }
+}