net.sourceforge.jcetaglib.lib
Class Digesters

java.lang.Object
  net.sourceforge.jcetaglib.lib.Digesters

public class Digesters

extends java.lang.Object

Digest/hash routines for use with BouncyCastle JCE provider

Version:

$Id: Digesters.java,v 1.3 2004/04/15 07:28:25 hamgert Exp $

Author:

Gert Van Ham, hamgert@users.sourceforge.net, http://jcetaglib.sourceforge.net

Constructor Summary

Digesters()

Method Summary

static java.lang.StringBuffer	formDigest(java.lang.StringBuffer text, java.lang.String digest, java.lang.String keyfile, java.lang.StringBuffer passphrase, java.lang.String algorithm) Creates a form digest string (= return digest from a text appended to a symmetric key)
static void	hash(java.io.InputStream is, java.io.DataOutputStream daos, java.lang.String algorithm, int bufferlength) Returns a message digest (hash) from an inputstream (one-way encryption)
static java.lang.StringBuffer	hash(java.lang.StringBuffer text, java.lang.String algorithm) Returns a message digest (hash) from a text
static java.lang.StringBuffer	hashFile(java.lang.String file, java.lang.String algorithm) Returns a message digest (hash) from a file

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Digesters

public Digesters()

Method Detail

hash

public static java.lang.StringBuffer hash(java.lang.StringBuffer text,
                                          java.lang.String algorithm)
                                   throws CryptoException

Returns a message digest (hash) from a text

Parameters:

text - text to create message digest from

algorithm - hash algorithm (e.g. "Tiger")

Returns:

message digest in BASE64 format

Throws:

CryptoException - encryption errors

hashFile

public static java.lang.StringBuffer hashFile(java.lang.String file,
                                              java.lang.String algorithm)
                                       throws CryptoException

Returns a message digest (hash) from a file

Parameters:

file - the filename/location

algorithm - hash algorithm (e.g. "Tiger")

Returns:

file digest in BASE64 format

Throws:

CryptoException - encryption errors

hash

public static void hash(java.io.InputStream is,
                        java.io.DataOutputStream daos,
                        java.lang.String algorithm,
                        int bufferlength)
                 throws CryptoException,
                        java.io.IOException

Returns a message digest (hash) from an inputstream (one-way encryption)

Parameters:

is - any inputstream to hash

daos - digest outputstream

algorithm - hash algorithm (e.g. "Tiger")

Throws:

CryptoException - encryption errors

java.io.IOException - I/O errors

formDigest

public static java.lang.StringBuffer formDigest(java.lang.StringBuffer text,
                                                java.lang.String digest,
                                                java.lang.String keyfile,
                                                java.lang.StringBuffer passphrase,
                                                java.lang.String algorithm)
                                         throws CryptoException,
                                                java.io.IOException

Creates a form digest string (= return digest from a text appended to a symmetric key)

Parameters:

text - StringBuffer form string

digest - String the digest/hash algorithm (e.g. MD5)

keyfile - String the keystore file(name)

passphrase - StringBuffer the passphrase for the keystore

algorithm - String encryption algorithm (e.g. "Rijndael")

Returns:

form digest in BASE64 format

Throws:

CryptoException - encryption errors

java.io.IOException - I/O errors