conversations-classic/src/main/java/eu/siacs/conversations/utils/BackupFileHeader.java

86 lines
2.2 KiB
Java
Raw Normal View History

2019-01-22 18:25:45 +00:00
package eu.siacs.conversations.utils;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Arrays;
import rocks.xmpp.addr.Jid;
public class BackupFileHeader {
private static final int VERSION = 1;
private String app;
private Jid jid;
private long timestamp;
private byte[] iv;
private byte[] salt;
@Override
public String toString() {
return "BackupFileHeader{" +
"app='" + app + '\'' +
", jid=" + jid +
", timestamp=" + timestamp +
", iv=" + CryptoHelper.bytesToHex(iv) +
", salt=" + CryptoHelper.bytesToHex(salt) +
'}';
}
public BackupFileHeader(String app, Jid jid, long timestamp, byte[] iv, byte[] salt) {
this.app = app;
this.jid = jid;
this.timestamp = timestamp;
this.iv = iv;
this.salt = salt;
}
public void write(DataOutputStream dataOutputStream) throws IOException {
dataOutputStream.writeInt(VERSION);
dataOutputStream.writeUTF(app);
dataOutputStream.writeUTF(jid.asBareJid().toEscapedString());
dataOutputStream.writeLong(timestamp);
dataOutputStream.write(iv);
dataOutputStream.write(salt);
}
public static BackupFileHeader read(DataInputStream inputStream) throws IOException {
final int version = inputStream.readInt();
if (version > VERSION) {
throw new IllegalArgumentException("Backup File version was " + version + " but app only supports up to version " + VERSION);
2019-01-22 18:25:45 +00:00
}
String app = inputStream.readUTF();
String jid = inputStream.readUTF();
long timestamp = inputStream.readLong();
byte[] iv = new byte[12];
inputStream.readFully(iv);
byte[] salt = new byte[16];
inputStream.readFully(salt);
return new BackupFileHeader(app, Jid.of(jid), timestamp, iv, salt);
2019-01-22 18:25:45 +00:00
}
public byte[] getSalt() {
return salt;
}
public byte[] getIv() {
return iv;
}
public Jid getJid() {
return jid;
}
public String getApp() {
return app;
}
public long getTimestamp() {
return timestamp;
}
}