void newFolder(String newName) throws IOException  {   /**    *  Indicates to the server that a new  folder with name    *  newName should be created    */     encryptAndWrite("NEWFOLDER\n"+newName.trim()+"\n");    readAndDecrypt();    if (!in.readLine().equals("OK")) throw new IOException();  }       void renameFolder(String passedFolderName, String newName) throws IOException  {   /**    *  Indicates to the server that the folder indicated by    *  passedFolderName should be renamed newName    */    encryptAndWrite("RENAMEFOLDER\n"+passedFolderName.trim()+"\n"+newName.trim()+"\n");    readAndDecrypt();    if (!in.readLine().equals("OK")) throw new IOException();    if (folderName.equals(passedFolderName)) folderName = newName;  }  void openFolder(String passedFolderName) throws IOException  {   /**    *   Retrieves information on the messages in a folder from the server    *       folderName is set to passedFolderName.    *        Currently open folder is folderName.    *        numberOfMessages is set to the number of messages in      *          the currently open folder.    *        numberOfUnreadMessages is set to the number of unread     *          messages in the currently open folder.    *        messageIDArray, subjectArray, fromArray, readArray are      *          set for the messages in the currently open folder.    */        encryptAndWrite("LISTMESSAGES\n"+passedFolderName.trim()+"\n");    readAndDecrypt();    if (!in.readLine().equals("OK")) throw new IOException();    folderName = passedFolderName.trim();    numberOfMessages = Integer.parseInt(in.readLine());    messageIDArray = new int[numberOfMessages];    subjectArray = new String[numberOfMessages];    fromArray = new String[numberOfMessages];    toArray = new String[numberOfMessages];    readArray = new boolean[numberOfMessages];    dateArray = new String[numberOfMessages];    messageSizeArray = new int[numberOfMessages];       for (int x=0;x<numberOfMessages;x++)    {       messageIDArray[x] = Integer.parseInt(in.readLine());      readArray[x] = (Integer.parseInt(in.readLine())==1);      subjectArray[x] = in.readLine();      fromArray[x] = in.readLine();      toArray[x] = in.readLine()+"";      dateArray[x] = in.readLine();      messageSizeArray[x] = Integer.parseInt(in.readLine());    }  }  void deleteMessage(int passedMessageID) throws IOException  {   /**    *  Indicates to the server to remove a message from    *  the currently open folder    */    encryptAndWrite("DELETEMESSAGE\n"+folderName+"\n"+String.valueOf(passedMessageID)+"\n");    readAndDecrypt();    if (!in.readLine().equals("OK")) throw new IOException();   }  void moveMessage(int messageID, String passedFolderName) throws IOException  {   /**    *      Indicates to the server to move a message from the      *      currently open folder to the folder indicated by    *      passedFolderName     */         encryptAndWrite("MOVEMESSAGE\n"+folderName +"\n"+String.valueOf(messageID)+        "\n"+passedFolderName.trim()+"\n");       readAndDecrypt();      if (!in.readLine().equals("OK")) throw new IOException();  }    /**   * Retrieves message from the server:   *    messageID is set to passedMessageID.   *        date, subject, from, replyTo, to, cc, body are set to    *          the corresponding fields from the message in the    *          currently open folder with messageID equal to   *          passedMessageID.    *   */  void getMessage(int passedMessageID) throws IOException  {    /* Clear old message info     */       messageID = passedMessageID;    date="";    subject="";    to="";     from="";    replyTo="";    cc="";    bcc="";    /*  This field contains information on the message's encryption.  For example it may contain     *  an encrypted key that is used to symmetrically encrypt the actual message, or it may     *  indicated that the message body is symmetrically encrypted directly with the user's passphrase     */     String encryption="";    String keyblock="";    body="";    actualbody="";    wasRewritten = false;      encryptAndWrite("GETMESSAGE\n"+folderName+"\n"+String.valueOf(passedMessageID)+"\n");    readAndDecrypt();    if (!in.readLine().equals("OK")) throw new IOException();    int lengthOfMessage = Integer.parseInt(in.readLine());    /* Message must be converted to bytes to get around     * problems with string reading in Java 1.0     */    byte[] messageBytes = new byte[lengthOfMessage];    in.read(messageBytes);    DataInputStream messageParser = new DataInputStream(new ByteArrayInputStream(messageBytes));     String line;           //  Determine whether message is encrypted    boolean encrypted = false;     String eTo = "";    String eCc = "";    String eBcc = "";    String lastField = new String();    while ((line=messageParser.readLine())!=null)      if (line.length()>4)       {        header=line.trim()+"\n";        break;      }    /* This loop parses out header fields     * and compensates for header modifications necessary     * in encrypted messages     */     while ((line=messageParser.readLine())!=null)    {      if (line.length()==0) break;      else       {       /* A string representing the complete header        * accessed if user wants to see full header        */        header=header+line+"\n";       /* Concatenate information from wrapped header fields        */        if (line.regionMatches(0," ",0,1))        {           if (lastField.equals("to")) to=to+line.trim();          else if (lastField.equals("cc")) cc=cc+line.trim();          else if (lastField.equals("bcc")) bcc=bcc+line.trim();          else if (lastField.equals("eTo")) eTo=eTo+line.trim();          else if (lastField.equals("eCc")) eCc=eCc+line.trim();          else if (lastField.equals("eBcc")) eBcc=eBcc+line.trim();          else if (lastField.equals("date")) date=date+line.trim();          else if (lastField.equals("subject")) subject=subject+line.trim();          else if (lastField.equals("replyTo")) replyTo=replyTo+line.trim();          else if (lastField.equals("encryption")) encryption=encryption+line.trim();          else if (lastField.equals("keyblock")) keyblock=keyblock+line.trim();        }        else if (line.regionMatches(0,"From:",0,5))         {          from=line.substring(5).trim();          lastField = "from";        }        else if (line.regionMatches(0,"Date:",0,5))         {          date=line.substring(5).trim();          lastField = "date";        }        else if (line.regionMatches(0,"To:",0,3))         {          to=line.substring(3).trim();          lastField = "to";        }        else if (line.regionMatches(0,"Cc:",0,3))         {          cc=line.substring(3).trim();          lastField = "cc";	}         else if (line.regionMatches(0,"Bcc:",0,4))         {          bcc=line.substring(4).trim();          lastField = "bcc";	}        /* E-cc is used to store Cc information in encrypted messages         * which can have no Cc field          */         else if (line.regionMatches(0,"E-Bcc:",0,6))         {          eBcc=line.substring(6).trim();          lastField = "eBcc";        }         /* E-to overrides To in encrypted messages          */        else if (line.regionMatches(0,"E-To:",0,5))         {          eTo=eTo+line.substring(5).trim();          lastField = "eTo";        }        /* E-cc is used to store Cc information in encrypted messages         * which can have no Cc field          */        else if (line.regionMatches(0,"E-Cc:",0,5))         {          eCc=line.substring(5).trim();          lastField = "eCc";        }         else if (line.regionMatches(0,"Subject:",0,8))         {          subject=line.substring(8).trim();          lastField = "subject";        }         else if (line.regionMatches(0,"Reply-To:",0,9))         {          replyTo=line.substring(9).trim();          lastField = "replyTo";        }          else if (line.regionMatches(0,"Hush-encryption:",0,16))         {          encrypted = true;          encryption=line.substring(17).trim();          lastField = "encryption";        }         else if (line.regionMatches(0,"Hush-keyblock:",0,14))        {          keyblock = line.substring(15).trim();          lastField = "keyblock";        }         else lastField = "";         }    }  // end while (line) loop    if (encrypted) to="";    if (eTo.length()>0) to=eTo;    if (eCc.length()>0) cc=eCc;    if (eBcc.length()>0) bcc=eBcc;    StringBuffer bodyBuffer = new StringBuffer();    while ((line=messageParser.readLine())!=null)    {      bodyBuffer.ensureCapacity(bodyBuffer.length()+line.length());      bodyBuffer = bodyBuffer.append(line + "\n");    }    body = bodyBuffer.toString();          to=wrap(to,true,false);    cc=wrap(cc,true,false);    bcc=wrap(bcc,true,false);    replyTo=wrap(replyTo,true,false);    subject=wrap(subject,true,false);    actualbody = body;    if (encrypted)    {      if (!folderName().equals("drafts"))         hushApplet.statusBar(spaces+"This message was sent securely"+spaces);       /* The body of the message should be decrypted here       * using the variable 'body' and the information stored in       * the variable 'encryption'       */       byte[] bodyBytes = new byte[body.length()];      body.getBytes(0,body.length(),bodyBytes,0);      DataInputStream parseBody = new DataInputStream(new ByteArrayInputStream(bodyBytes));      StringBuffer encBodyBuf = new StringBuffer();      String bodyHash = "";      boolean inCipher = false;      String i;      while ((i = parseBody.readLine())!=null)      {        i = i.trim();        if (i.equals("----- HushMail v1.0 -----")) inCipher=true;        else if (i.regionMatches(0,"-",0,1))        {          bodyHash = i.substring(1);          break;        }        else if (inCipher)         {          encBodyBuf.ensureCapacity(encBodyBuf.length()+i.length());          encBodyBuf.append(i);        }      }      byte[] encKeyblock = Conversions.hexStringToBytes(keyblock);      byte[] plainKey = new byte[16];               byte[] keyHash = new byte[20];      byte[] bodyKeyAndHash = new byte[36];       /* Decrypt bodykey based on information included in "Encryption:" header        */      if (encryption.equals("Hush Private 1.0")) bodyKeyAndHash = passCipher.decrypt(encKeyblock);      else if (encryption.equals("Hush Public 1.0"))       {        /*  Make sure everything is wiped after private key is decrypted and used         */        byte[] privKey = passCipher.decrypt(encPrivKey);        ElGamalCipher privKeyCipher = new ElGamalCipher();        privKeyCipher.setPrivateKey(privKey);        bodyKeyAndHash = privKeyCipher.hushDecrypt(encKeyblock,36);        for (int x=0;x<privKey.length;x++) privKey[x]=0;        privKeyCipher.setPrivateKey(privKey);        privKey=null;        privKeyCipher=null;      }      System.arraycopy(bodyKeyAndHash,0,plainKey,0,16);      System.arraycopy(bodyKeyAndHash,16,keyHash,0,20);      if (keyHash.length!=20) hushApplet.statusBar(spaces+"Wrong hash length.  Message may not be valid."+spaces);      else      {        if (!Conversions.bytesToHexString(keyHash).equals(Conversions.bytesToHexString(new HushSHA1().SHA1Hash(plainKey)))) hushApplet.statusBar(spaces+"Hash failed.  Message may not be valid"+spaces);      }      BlowfishCipher bodyCipher = new BlowfishCipher();      bodyCipher.setKey(plainKey);      body = bodyCipher.stringDecrypt(Conversions.hexStringToBytes(encBodyBuf.toString()));      if (bodyHash.length()!=40)         hushApplet.statusBar(spaces+"Wrong hash length.  Message may not be valid."+spaces);      {        if (!bodyHash.equals(Conversions.bytesToHexString(new HushSHA1().SHA1Hash(body))))           hushApplet.statusBar(spaces+"Hash failed.  Message may not be valid"+spaces);      }      if (encryption.equals("Hush Public 1.0"))      {                String newKeyblock = "Hush-keyblock: "+Conversions.bytesToHexString(passCipher.encrypt(bodyKeyAndHash))+"\n";        StringBuffer newMessageBuf = new StringBuffer();        boolean inKeyblock = false;        boolean foundHeader = false;        boolean statusFieldFound = false;        messageParser.reset();        while ((line=messageParser.readLine())!=null)        {          newMessageBuf.ensureCapacity(newMessageBuf.length()+line.length());          if (line.regionMatches(0,"From ",0,5)) foundHeader=true;          if (line.trim().length()==0 && !statusFieldFound && foundHeader)	  {            statusFieldFound = true;            newMessageBuf.append("Status: RO\n");          }          if (line.regionMatches(0,"Hush-encryption:",0,16)) newMessageBuf.append("Hush-encryption: Hush Private 1.0\n");          else if (line.regionMatches(0,"Hush-keyblock:",0,14))          {            inKeyblock = true;            newMessageBuf.append(wrap(newKeyblock,false,true));          }          else if (line.regionMatches(0,"Status:",0,7))	  {            inKeyblock = false;            newMessageBuf.append("Status: RO\n");          }          else if (!line.regionMatches(0," ",0,1)&&inKeyblock)          {            inKeyblock = false;            newMessageBuf.append(line + "\n");          }          else if (!inKeyblock) newMessageBuf.append(line + "\n");         }        deleteMessage(messageID);        String newMessage = newMessageBuf.toString();        encryptAndWrite("SAVEMESSAGE\n" + folderName + "\n" + String.valueOf(newMessage.length()) + "\n" + newMessage);        readAndDecrypt();        if (!in.readLine().equals("OK")) throw new IOException();        wasRewritten = true;      }     }    else     {      if (!folderName().equals("drafts"))         hushApplet.statusBar(spaces+"This message was NOT sent securely"+spaces);      else hushApplet.statusBar(spaces+"This message was NOT saved securely"+spaces);    }    body = wrap(body,true,false);  }  void sendPlainMessage(String header, String body, boolean saveToSent)    throws IOException  {    String message = new String(header+"\n"+body);    if (saveToSent)     {      String firstLine =  "From "+emailAddress()+"  "+new Date().toString()+"\n";      encryptAndWrite("SAVEMESSAGE\nsent\n"+String.valueOf(firstLine.length()+message.length())+"\n"+firstLine+message);      readAndDecrypt();      if (!in.readLine().equals("OK")) throw new IOException();    }    encryptAndWrite("SENDMESSAGE\n"+String.valueOf(message.length())+"\n"+message);    readAndDecrypt();    if (!in.readLine().equals("OK")) throw new IOException();  }  /**   *  Send a formatted message to the server.   *   NOTE!!  Line wraps in header will be done on server side!!   */  boolean sendEncryptedMessage(String[] recipients, String[] headers, String body, boolean save, String saveFolder) throws IOException  {    /* Returns true if all recipients are vaild HushMail users.     */    /* Get the public keys     */          String[] pubKeys = new String[recipients.length];       for (int x=0;x<recipients.length;x++)    {      if (!recipients[x].equals(username)&&!recipients[x].equals("/self/"))      {        hushApplet.statusBar(spaces+"Retrieving public key for "+recipients[x]+spaces);        encryptAndWrite("GETPUBLICKEY\n"+recipients[x]+"\n");        readAndDecrypt();        if (!in.readLine().equals("OK")) throw new IOException();                if (in.readLine().equals("APPROVED")) pubKeys[x] = in.readLine().trim();        else         {          hushApplet.statusBar (spaces+"No such user: "+recipients[x]+spaces);          return false;        }