/*// $Log: FileView.java,v $// Revision 1.3  1999/06/30 23:06:44  edwin// Changing package name and fixing references to moved and/or changed classes.//// Revision 1.2  1997/12/07 07:01:28  hopwood// + Can't remember what the change was - must have been something trivial.//// Revision 1.1.1.1  1997/11/03 22:36:55  hopwood// + Imported to CVS (tagged as 'start').//// $Endlog$*/package cryptix.examples.pgp;import java.io.*;import cryptix.pgp.*;import cryptix.security.*;import cryptix.security.rsa.*;import cryptix.util.core.Hex;import cryptix.mime.LegacyString;/** * DOCUMENT ME. * <p> * SECURITY: this should not be public, since it can read from arbitrary * files. */final class FileView{    private static void usage()    {        System.out.println("Usage: java cryptix.pgp_examples.FileView [-s secring-filename] pgp-filename passphrase");    }    public static void main(String[] args)    {        String filename = null;        String secringname = "secring.pgp";        String passphrase = null;        switch (args.length)        {        case 4:            if (("-?".equals(args[0])) || (!("-s".equals(args[0]))))            {                usage();                return;            }            secringname = args[1];            filename = args[2];            passphrase = args[3];            break;        case 2:            if (("-?".equals(filename = args[0])))            {                usage();                return;            }            passphrase = args[1];            break;        default:            usage();            return;        }        try        {            SecretKey key = null;            try            {                InputStream sec_in;                Packet p = PacketFactory.read(new DataInputStream(sec_in = new FileInputStream(secringname)));                sec_in.close();                if (!(p instanceof SecretKeyCertificate))                {                    System.out.println("File : " + secringname + " Not a pgp secret key.");                    System.exit(-1);                }                key = ((SecretKeyCertificate)p).getSecretKey(new Passphrase(passphrase));            }            catch(FileNotFoundException fnfe)            {                System.out.println("File : " + secringname + " Not found.");                System.exit(-1);            }            catch(DecryptException fnfe)            {                System.out.println("Incorrect passphrase");                System.exit(-1);            }            InputStream in;            System.out.println("- contents of " + filename + " -");            viewPackets(0, key, new DataInputStream(in = new FileInputStream(filename)));            in.close();        }        catch(FileNotFoundException fnfe)        {            System.out.println("File : " + filename + " Not found.");        }        catch(Exception e)        {            e.printStackTrace(System.out);        }    }    private static void viewPackets(int level, cryptix.security.rsa.SecretKey key,                                     DataInputStream in)    throws IOException, DecryptException    {        int i = 1;        Packet pkt;        PublicKeyEncrypted hdr = null;        Signature sig = null;        while((pkt = PacketFactory.read(in)) != null)        {            println(level, "*- packet " + i++ + " : " + pkt.getClass().getName());            if (pkt instanceof PublicKeyEncrypted)                hdr = (PublicKeyEncrypted)pkt;            println(level, pkt.toString());            if (pkt instanceof ConvEncryptedData)            {                try                {                    if (hdr != null)                    {                        byte ideakey[] = hdr.getKey(key);                        byte data[] = ((ConvEncryptedData)pkt).data(ideakey);                        viewPackets(level + 1, key, new DataInputStream(new ByteArrayInputStream(data)));                      }                    else                        println(level, "no IDEA key found");                }                catch (IOException ioe)                {                    println(level, "Unable to recure ...");                    println(level, ioe.getClass().getName() + ":" + ioe.getMessage());                }                catch (Error e)                {                    e.printStackTrace(System.out);                    println(level, "unable to get IDEA key ...");                    println(level, e.getClass().getName() + ":" + e.getMessage());                }            }            else if (pkt instanceof LiteralData)            {                LiteralData p = (LiteralData)pkt;                byte buf[];                println(level, "original file: " + p.filename() + " mode:" + p.mode());                println(level, " date created: " + p.timestamp());                println(level, "data;");                println(level + 1, LegacyString.toString(buf = p.data()));                if (sig != null)                {                    try                    {                        MD5 md = new MD5();                        if (p.mode()  != 'b')                        {                            println(level, "text file converting for signature");                            texthashlinesinto(md, buf);                        }                        else                        {                            println(level, "Binary file");                            md.add(buf);                        }                        if (sig.check(key, md))                            println(level, "signed by me and O.K.");                        else                            println(level, "NOT signed by me");                    }                    catch (IOException ioe)                    {                        println(level, "Unable to check signature ...");                        println(level, ioe.getClass().getName() + ":" + ioe.getMessage());                    }                }                else                    println(level, "NO signature");            }            else if (pkt instanceof Signature)            {                sig = (Signature)pkt;                println(level, "keyid:" + hexString(sig.getKeyId()));            }        }        println(level, "- Done -");    }        private static final int LINE_LENGTH = 76;    private static void println(int level, String msg)    {        DataInputStream in = new DataInputStream(new StringBufferInputStream(msg));        int max = LINE_LENGTH - level;        try        {            while ((msg = in.readLine()) != null)            {                while (msg.length() > max)                {                    printString(level, msg.substring(0, max));                    msg = msg.substring(max);                }                printString(level, msg);            }        }        catch (IOException ioe)        {        }    }    private static void printString(int level, String msg)    {        System.out.print(level);        System.out.print('-');        while (level-- > 0)            System.out.print(' ');        System.out.println(msg);    }        private static void texthashlinesinto(MD5 md, byte[] buf)    throws IOException    {        DataInputStream in = new DataInputStream(new ByteArrayInputStream(buf));        String line;        while((line = in.readLine()) != null)        {            if (line.startsWith("- "));                line = line.substring(2);            md.add(LegacyString.toByteArray(line + "\r\n"));        }    }        private static String hexString(KeyID id)    {        return Hex.toString(id.toByteArray());    }}