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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.apache.harmony.xnet.provider.jsse;
     18 
     19 import java.io.IOException;
     20 import java.io.NotSerializableException;
     21 import java.io.ObjectInputStream;
     22 import java.io.ObjectOutputStream;
     23 import java.math.BigInteger;
     24 import java.security.InvalidAlgorithmParameterException;
     25 import java.security.InvalidKeyException;
     26 import java.security.interfaces.ECPublicKey;
     27 import java.security.spec.ECParameterSpec;
     28 import java.security.spec.ECPoint;
     29 import java.security.spec.ECPublicKeySpec;
     30 import java.security.spec.InvalidKeySpecException;
     31 import java.util.Arrays;
     32 
     33 public final class OpenSSLECPublicKey implements ECPublicKey, OpenSSLKeyHolder {
     34     private static final long serialVersionUID = 3215842926808298020L;
     35 
     36     private static final String ALGORITHM = "EC";
     37 
     38     protected transient OpenSSLKey key;
     39 
     40     protected transient OpenSSLECGroupContext group;
     41 
     42     public OpenSSLECPublicKey(OpenSSLECGroupContext group, OpenSSLKey key) {
     43         this.group = group;
     44         this.key = key;
     45     }
     46 
     47     public OpenSSLECPublicKey(OpenSSLKey key) {
     48         final long origGroup = NativeCrypto.EC_KEY_get0_group(key.getPkeyContext());
     49         this.group = new OpenSSLECGroupContext(NativeCrypto.EC_GROUP_dup(origGroup));
     50         this.key = key;
     51     }
     52 
     53     public OpenSSLECPublicKey(ECPublicKeySpec ecKeySpec) throws InvalidKeySpecException {
     54         try {
     55             group = OpenSSLECGroupContext.getInstance(ecKeySpec.getParams());
     56             OpenSSLECPointContext pubKey = OpenSSLECPointContext.getInstance(
     57                     NativeCrypto.get_EC_GROUP_type(group.getContext()), group, ecKeySpec.getW());
     58             key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_EC_KEY(group.getContext(),
     59                     pubKey.getContext(), null));
     60         } catch (Exception e) {
     61             throw new InvalidKeySpecException(e);
     62         }
     63     }
     64 
     65     public static OpenSSLKey getInstance(ECPublicKey ecPublicKey) throws InvalidKeyException {
     66         try {
     67             OpenSSLECGroupContext group = OpenSSLECGroupContext
     68                     .getInstance(ecPublicKey.getParams());
     69             OpenSSLECPointContext pubKey = OpenSSLECPointContext.getInstance(
     70                     NativeCrypto.get_EC_GROUP_type(group.getContext()), group, ecPublicKey.getW());
     71             return new OpenSSLKey(NativeCrypto.EVP_PKEY_new_EC_KEY(group.getContext(),
     72                     pubKey.getContext(), null));
     73         } catch (Exception e) {
     74             throw new InvalidKeyException(e);
     75         }
     76     }
     77 
     78     @Override
     79     public String getAlgorithm() {
     80         return ALGORITHM;
     81     }
     82 
     83     @Override
     84     public String getFormat() {
     85         return "X.509";
     86     }
     87 
     88     @Override
     89     public byte[] getEncoded() {
     90         return NativeCrypto.i2d_PUBKEY(key.getPkeyContext());
     91     }
     92 
     93     @Override
     94     public ECParameterSpec getParams() {
     95         return group.getECParameterSpec();
     96     }
     97 
     98     private ECPoint getPublicKey() {
     99         final OpenSSLECPointContext pubKey = new OpenSSLECPointContext(group,
    100                 NativeCrypto.EC_KEY_get_public_key(key.getPkeyContext()));
    101 
    102         return pubKey.getECPoint();
    103     }
    104 
    105     @Override
    106     public ECPoint getW() {
    107         return getPublicKey();
    108     }
    109 
    110     @Override
    111     public OpenSSLKey getOpenSSLKey() {
    112         return key;
    113     }
    114 
    115     @Override
    116     public boolean equals(Object o) {
    117         if (o == this) {
    118             return true;
    119         }
    120 
    121         if (o instanceof OpenSSLECPrivateKey) {
    122             OpenSSLECPrivateKey other = (OpenSSLECPrivateKey) o;
    123             return key.equals(other.key);
    124         }
    125 
    126         if (!(o instanceof ECPublicKey)) {
    127             return false;
    128         }
    129 
    130         final ECPublicKey other = (ECPublicKey) o;
    131         if (!getPublicKey().equals(other.getW())) {
    132             return false;
    133         }
    134 
    135         final ECParameterSpec spec = getParams();
    136         final ECParameterSpec otherSpec = other.getParams();
    137 
    138         return spec.getCurve().equals(otherSpec.getCurve())
    139                 && spec.getGenerator().equals(otherSpec.getGenerator())
    140                 && spec.getOrder().equals(otherSpec.getOrder())
    141                 && spec.getCofactor() == otherSpec.getCofactor();
    142     }
    143 
    144     @Override
    145     public int hashCode() {
    146         return Arrays.hashCode(NativeCrypto.i2d_PUBKEY(key.getPkeyContext()));
    147     }
    148 
    149     @Override
    150     public String toString() {
    151         return NativeCrypto.EVP_PKEY_print_public(key.getPkeyContext());
    152     }
    153 
    154     private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
    155         stream.defaultReadObject();
    156 
    157         byte[] encoded = (byte[]) stream.readObject();
    158 
    159         key = new OpenSSLKey(NativeCrypto.d2i_PUBKEY(encoded));
    160 
    161         final long origGroup = NativeCrypto.EC_KEY_get0_group(key.getPkeyContext());
    162         group = new OpenSSLECGroupContext(NativeCrypto.EC_GROUP_dup(origGroup));
    163     }
    164 
    165     private void writeObject(ObjectOutputStream stream) throws IOException {
    166         if (key.isEngineBased()) {
    167             throw new NotSerializableException("engine-based keys can not be serialized");
    168         }
    169 
    170         stream.defaultWriteObject();
    171         stream.writeObject(getEncoded());
    172     }
    173 }
    174