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package org.bouncycastle.crypto.tls;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.bouncycastle.util.Strings;
public class ServerName
{
protected short nameType;
protected Object name;
public ServerName(short nameType, Object name)
{
if (!isCorrectType(nameType, name))
{
throw new IllegalArgumentException("'name' is not an instance of the correct type");
}
this.nameType = nameType;
this.name = name;
}
public short getNameType()
{
return nameType;
}
public Object getName()
{
return name;
}
public String getHostName()
{
if (!isCorrectType(NameType.host_name, name))
{
throw new IllegalStateException("'name' is not a HostName string");
}
return (String)name;
}
/**
* Encode this {@link ServerName} to an {@link OutputStream}.
*
* @param output
* the {@link OutputStream} to encode to.
* @throws IOException
*/
public void encode(OutputStream output) throws IOException
{
TlsUtils.writeUint8(nameType, output);
switch (nameType)
{
case NameType.host_name:
byte[] utf8Encoding = Strings.toUTF8ByteArray((String)name);
if (utf8Encoding.length < 1)
{
throw new TlsFatalAlert(AlertDescription.internal_error);
}
TlsUtils.writeOpaque16(utf8Encoding, output);
break;
default:
throw new TlsFatalAlert(AlertDescription.internal_error);
}
}
/**
* Parse a {@link ServerName} from an {@link InputStream}.
*
* @param input
* the {@link InputStream} to parse from.
* @return a {@link ServerName} object.
* @throws IOException
*/
public static ServerName parse(InputStream input) throws IOException
{
short name_type = TlsUtils.readUint8(input);
Object name;
switch (name_type)
{
case NameType.host_name:
{
byte[] utf8Encoding = TlsUtils.readOpaque16(input);
if (utf8Encoding.length < 1)
{
throw new TlsFatalAlert(AlertDescription.decode_error);
}
name = Strings.fromUTF8ByteArray(utf8Encoding);
break;
}
default:
throw new TlsFatalAlert(AlertDescription.decode_error);
}
return new ServerName(name_type, name);
}
protected static boolean isCorrectType(short nameType, Object name)
{
switch (nameType)
{
case NameType.host_name:
return name instanceof String;
default:
throw new IllegalArgumentException("'name' is an unsupported value");
}
}
}
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