114 lines
3.1 KiB
Java
114 lines
3.1 KiB
Java
/**
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* Copyright (C) 2011 Whisper Systems
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* Copyright (C) 2013 Open Whisper Systems
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.whispersystems.textsecure.crypto;
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import android.os.Parcel;
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import android.os.Parcelable;
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import org.whispersystems.textsecure.crypto.ecc.Curve;
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import org.whispersystems.textsecure.crypto.ecc.ECPublicKey;
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import org.whispersystems.textsecure.util.Hex;
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/**
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* A class for representing an identity key.
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*
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* @author Moxie Marlinspike
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*/
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public class IdentityKey implements Parcelable, SerializableKey {
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public static final Parcelable.Creator<IdentityKey> CREATOR = new Parcelable.Creator<IdentityKey>() {
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public IdentityKey createFromParcel(Parcel in) {
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try {
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return new IdentityKey(in);
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} catch (InvalidKeyException e) {
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throw new AssertionError(e);
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}
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}
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public IdentityKey[] newArray(int size) {
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return new IdentityKey[size];
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}
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};
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public static final int NIST_SIZE = 1 + ECPublicKey.KEY_SIZE;
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private ECPublicKey publicKey;
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public IdentityKey(ECPublicKey publicKey) {
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this.publicKey = publicKey;
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}
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public IdentityKey(Parcel in) throws InvalidKeyException {
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int length = in.readInt();
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byte[] serialized = new byte[length];
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in.readByteArray(serialized);
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initializeFromSerialized(serialized, 0);
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}
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public IdentityKey(byte[] bytes, int offset) throws InvalidKeyException {
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initializeFromSerialized(bytes, offset);
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}
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public ECPublicKey getPublicKey() {
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return publicKey;
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}
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private void initializeFromSerialized(byte[] bytes, int offset) throws InvalidKeyException {
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if ((bytes[offset] & 0xff) == 1) {
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this.publicKey = Curve.decodePoint(bytes, offset +1);
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} else {
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this.publicKey = Curve.decodePoint(bytes, offset);
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}
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}
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public byte[] serialize() {
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return publicKey.serialize();
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}
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public String getFingerprint() {
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return Hex.toString(publicKey.serialize());
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}
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@Override
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public boolean equals(Object other) {
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if (other == null) return false;
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if (!(other instanceof IdentityKey)) return false;
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return publicKey.equals(((IdentityKey) other).getPublicKey());
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}
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@Override
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public int hashCode() {
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return publicKey.hashCode();
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}
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public int describeContents() {
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// TODO Auto-generated method stub
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return 0;
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}
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public void writeToParcel(Parcel dest, int flags) {
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byte[] serialized = this.serialize();
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dest.writeInt(serialized.length);
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dest.writeByteArray(serialized);
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}
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}
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