85 lines
2.3 KiB
Java
85 lines
2.3 KiB
Java
package eu.siacs.conversations.utils;
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import java.io.DataInputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import eu.siacs.conversations.xmpp.Jid;
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public class BackupFileHeader {
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private static final int VERSION = 1;
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private final String app;
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private final Jid jid;
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private final long timestamp;
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private final byte[] iv;
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private final byte[] salt;
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@Override
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public String toString() {
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return "BackupFileHeader{" +
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"app='" + app + '\'' +
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", jid=" + jid +
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", timestamp=" + timestamp +
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", iv=" + CryptoHelper.bytesToHex(iv) +
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", salt=" + CryptoHelper.bytesToHex(salt) +
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'}';
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}
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public BackupFileHeader(String app, Jid jid, long timestamp, byte[] iv, byte[] salt) {
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this.app = app;
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this.jid = jid;
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this.timestamp = timestamp;
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this.iv = iv;
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this.salt = salt;
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}
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public void write(DataOutputStream dataOutputStream) throws IOException {
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dataOutputStream.writeInt(VERSION);
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dataOutputStream.writeUTF(app);
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dataOutputStream.writeUTF(jid.asBareJid().toEscapedString());
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dataOutputStream.writeLong(timestamp);
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dataOutputStream.write(iv);
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dataOutputStream.write(salt);
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}
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public static BackupFileHeader read(DataInputStream inputStream) throws IOException {
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final int version = inputStream.readInt();
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if (version > VERSION) {
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throw new IllegalArgumentException("Backup File version was " + version + " but app only supports up to version " + VERSION);
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}
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String app = inputStream.readUTF();
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String jid = inputStream.readUTF();
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long timestamp = inputStream.readLong();
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byte[] iv = new byte[12];
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inputStream.readFully(iv);
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byte[] salt = new byte[16];
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inputStream.readFully(salt);
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return new BackupFileHeader(app, Jid.of(jid), timestamp, iv, salt);
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}
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public byte[] getSalt() {
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return salt;
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}
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public byte[] getIv() {
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return iv;
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}
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public Jid getJid() {
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return jid;
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}
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public String getApp() {
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return app;
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}
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public long getTimestamp() {
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return timestamp;
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}
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}
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