8308398: Move SunEC crypto provider into java.base

Reviewed-by: valeriep, alanb

src/java.base/share/classes/sun/security/ec/ed/EdDSAPublicKeyImpl.java

@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2020, 2021, 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 sun.security.ec.ed;
+
+import java.math.BigInteger;
+import java.security.InvalidKeyException;
+import java.security.KeyRep;
+import java.security.interfaces.EdECPublicKey;
+import java.security.spec.EdECPoint;
+import java.security.spec.NamedParameterSpec;
+import java.util.Arrays;
+
+import sun.security.util.BitArray;
+import sun.security.x509.AlgorithmId;
+import sun.security.x509.X509Key;
+
+public final class EdDSAPublicKeyImpl extends X509Key implements EdECPublicKey {
+
+    private static final long serialVersionUID = 1L;
+
+    @SuppressWarnings("serial") // Type of field is not Serializable
+    private final EdECPoint point;
+    @SuppressWarnings("serial") // Type of field is not Serializable
+    private final NamedParameterSpec paramSpec;
+
+    public EdDSAPublicKeyImpl(EdDSAParameters params, EdECPoint point)
+            throws InvalidKeyException {
+        this.paramSpec = new NamedParameterSpec(params.getName());
+        this.algid = new AlgorithmId(params.getOid());
+        this.point = point;
+
+        byte[] encodedPoint = point.getY().toByteArray();
+        reverse(encodedPoint);
+        // array may be too large or too small, depending on the value
+        encodedPoint = Arrays.copyOf(encodedPoint, params.getKeyLength());
+        // set the high-order bit of the encoded point
+        byte msb = (byte) (point.isXOdd() ? 0x80 : 0);
+        encodedPoint[encodedPoint.length - 1] |= msb;
+        setKey(new BitArray(encodedPoint.length * 8, encodedPoint));
+
+        checkLength(params);
+    }
+
+    public EdDSAPublicKeyImpl(byte[] encoded) throws InvalidKeyException {
+        decode(encoded);
+
+        EdDSAParameters params =
+            EdDSAParameters.get(InvalidKeyException::new, algid);
+        this.paramSpec = new NamedParameterSpec(params.getName());
+        // construct the EdECPoint representation
+        byte[] encodedPoint = getKey().toByteArray();
+        byte msb = encodedPoint[encodedPoint.length - 1];
+        encodedPoint[encodedPoint.length - 1] &= (byte) 0x7F;
+        boolean xOdd = (msb & 0x80) != 0;
+        reverse(encodedPoint);
+        BigInteger y = new BigInteger(1, encodedPoint);
+        this.point = new EdECPoint(xOdd, y);
+
+        checkLength(params);
+    }
+
+    void checkLength(EdDSAParameters params) throws InvalidKeyException {
+        if (params.getKeyLength() * 8 != getKey().length()) {
+            throw new InvalidKeyException(
+                "key length must be " + params.getKeyLength());
+        }
+    }
+
+    public byte[] getEncodedPoint() {
+        return getKey().toByteArray();
+    }
+
+    @Override
+    public EdECPoint getPoint() {
+        return point;
+    }
+
+    @Override
+    public NamedParameterSpec getParams() {
+        return paramSpec;
+    }
+
+    @Override
+    public String getAlgorithm() {
+        return "EdDSA";
+    }
+
+    protected Object writeReplace() throws java.io.ObjectStreamException {
+        return new KeyRep(KeyRep.Type.PUBLIC, getAlgorithm(), getFormat(),
+                getEncoded());
+    }
+
+    private static void swap(byte[] arr, int i, int j) {
+        byte tmp = arr[i];
+        arr[i] = arr[j];
+        arr[j] = tmp;
+    }
+
+    private static void reverse(byte [] arr) {
+        int i = 0;
+        int j = arr.length - 1;
+
+        while (i < j) {
+            swap(arr, i, j);
+            i++;
+            j--;
+        }
+    }
+}