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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

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package sun.security.jgss.krb5;

import org.ietf.jgss.*;

import java.io.InputStream;

import java.io.OutputStream;

import java.io.IOException;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

class MicToken extends MessageToken {

  public MicToken(Krb5Context context,

                  byte[] tokenBytes, int tokenOffset, int tokenLen,

                  MessageProp prop)  throws GSSException {

        super(Krb5Token.MIC_ID, context,

          tokenBytes, tokenOffset, tokenLen, prop);

  }

  public MicToken(Krb5Context context,

                   InputStream is, MessageProp prop)

    throws GSSException {

    super(Krb5Token.MIC_ID, context, is, prop);

  }

  public void verify(byte[] data, int offset, int len) throws GSSException {

        if (!verifySignAndSeqNumber(null, data, offset, len, null))

      throw new GSSException(GSSException.BAD_MIC, -1,

                         "Corrupt checksum or sequence number in MIC token");

  }

  public void verify(InputStream data) throws GSSException {

    byte[] dataBytes = null;

    try {

      dataBytes = new byte[data.available()];

      data.read(dataBytes);

    } catch (IOException e) {

      // Error reading application data

      throw new GSSException(GSSException.BAD_MIC, -1,

                         "Corrupt checksum or sequence number in MIC token");

    }

      verify(dataBytes, 0, dataBytes.length);

  }

  public MicToken(Krb5Context context, MessageProp prop,

                  byte[] data, int pos, int len)

        throws GSSException {

        super(Krb5Token.MIC_ID, context);

        //      debug("Application data to MicToken verify is [" +

        //            getHexBytes(data, pos, len) + "]\n");

        if (prop == null) prop = new MessageProp(0, false);

        genSignAndSeqNumber(prop, null, data, pos, len, null);

  }

  public MicToken(Krb5Context context, MessageProp prop,

                  InputStream data)

        throws GSSException, IOException {

        super(Krb5Token.MIC_ID, context);

        byte[] dataBytes = new byte[data.available()];

        data.read(dataBytes);

        //debug("Application data to MicToken cons is [" +

        //     getHexBytes(dataBytes) + "]\n");

        if (prop == null) prop = new MessageProp(0, false);

        genSignAndSeqNumber(prop, null, dataBytes, 0, dataBytes.length, null);

  }

  protected int getSealAlg(boolean confRequested, int qop) {

        return (SEAL_ALG_NONE);

  }

  public int encode(byte[] outToken, int offset)

      throws IOException, GSSException {

      // Token  is small

      ByteArrayOutputStream bos = new ByteArrayOutputStream();

      super.encode(bos);

      byte[] token = bos.toByteArray();

      System.arraycopy(token, 0, outToken, offset, token.length);

      return token.length;

  }

  public byte[] encode() throws IOException, GSSException{

    // XXX Fine tune this initial size

    ByteArrayOutputStream bos = new ByteArrayOutputStream(50);

    encode(bos);

    return bos.toByteArray();

  }

}