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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package org.conscrypt;
     18 
     19 import java.math.BigInteger;
     20 import java.security.spec.ECPoint;
     21 
     22 final class OpenSSLECPointContext {
     23     private final OpenSSLECGroupContext group;
     24     private final long pointCtx;
     25 
     26     OpenSSLECPointContext(OpenSSLECGroupContext group, long pointCtx) {
     27         this.group = group;
     28         this.pointCtx = pointCtx;
     29     }
     30 
     31     @Override
     32     protected void finalize() throws Throwable {
     33         try {
     34             if (pointCtx != 0) {
     35                 NativeCrypto.EC_POINT_clear_free(pointCtx);
     36             }
     37         } finally {
     38             super.finalize();
     39         }
     40     }
     41 
     42     @Override
     43     public boolean equals(Object o) {
     44         if (!(o instanceof OpenSSLECPointContext)) {
     45             return false;
     46         }
     47 
     48         final OpenSSLECPointContext other = (OpenSSLECPointContext) o;
     49         if (!NativeCrypto.EC_GROUP_cmp(group.getContext(), other.group.getContext())) {
     50             return false;
     51         }
     52 
     53         return NativeCrypto.EC_POINT_cmp(group.getContext(), pointCtx, other.pointCtx);
     54     }
     55 
     56     public ECPoint getECPoint() {
     57         final byte[][] generatorCoords = NativeCrypto.EC_POINT_get_affine_coordinates(
     58                 group.getContext(), pointCtx);
     59         final BigInteger x = new BigInteger(generatorCoords[0]);
     60         final BigInteger y = new BigInteger(generatorCoords[1]);
     61         return new ECPoint(x, y);
     62     }
     63 
     64     @Override
     65     public int hashCode() {
     66         // TODO Auto-generated method stub
     67         return super.hashCode();
     68     }
     69 
     70     public long getContext() {
     71         return pointCtx;
     72     }
     73 
     74     public static OpenSSLECPointContext getInstance(int curveType, OpenSSLECGroupContext group,
     75             ECPoint javaPoint) {
     76         OpenSSLECPointContext point = new OpenSSLECPointContext(group,
     77                 NativeCrypto.EC_POINT_new(group.getContext()));
     78         NativeCrypto.EC_POINT_set_affine_coordinates(group.getContext(),
     79                 point.getContext(), javaPoint.getAffineX().toByteArray(),
     80                 javaPoint.getAffineY().toByteArray());
     81         return point;
     82     }
     83 }
     84