net.sourceforge.jcetaglib.lib
Class PBECrypt

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

public class PBECrypt

extends java.lang.Object

PBE (Password-based) encryption & decryption routines for use with BouncyCastle JCE provider

Version:

$Id: PBECrypt.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

PBECrypt()

Method Summary

static void	decrypt(java.io.InputStream is, java.io.DataOutputStream daos, java.lang.StringBuffer passphrase, java.lang.String algorithm, int bufferlength) Decrypts any inputstream with PBE
static java.lang.StringBuffer	decrypt(java.lang.StringBuffer text, java.lang.StringBuffer passphrase, java.lang.String algorithm) Decrypts a ciphertext with PBE
static void	decryptFile(java.lang.String file, java.lang.String newfile, java.lang.StringBuffer passphrase, java.lang.String algorithm) Decrypts a ciphered file with PBE
static void	encrypt(java.io.InputStream is, java.io.DataOutputStream daos, byte[] seed, java.lang.StringBuffer passphrase, java.lang.String algorithm, int bufferlength) Encrypts any inputstream with PBE (password-based encryption)
static java.lang.StringBuffer	encrypt(java.lang.StringBuffer text, java.lang.StringBuffer passphrase, byte[] seed, java.lang.String algorithm) Encrypts a string with PBE and returns the ciphered text in BASE64 format.
static java.lang.StringBuffer	encrypt(java.lang.StringBuffer text, java.lang.StringBuffer passphrase, java.lang.String algorithm) Encrypts a string with PBE and returns the ciphered text in BASE64 format.
static void	encryptFile(java.lang.String file, java.lang.String newfile, java.lang.StringBuffer passphrase, byte[] seed, java.lang.String algorithm) Encrypts a file with PBE and creates a new file with the result.
static void	encryptFile(java.lang.String file, java.lang.String newfile, java.lang.StringBuffer passphrase, java.lang.String algorithm) Encrypts a file with PBE and creates a new file with the result.

Methods inherited from class java.lang.Object

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

Constructor Detail

PBECrypt

public PBECrypt()

Method Detail

encrypt

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

Encrypts a string with PBE and returns the ciphered text in BASE64 format.

Parameters:

text - the text to encrypt

passphrase - password or passphrase

algorithm - encryption algorithm (e.g. "PBEWithSHAAndIDEA-CBC")

Returns:

the cipherstring in BASE64 format

Throws:

CryptoException - for all encryption errors

encrypt

public static java.lang.StringBuffer encrypt(java.lang.StringBuffer text,
                                             java.lang.StringBuffer passphrase,
                                             byte[] seed,
                                             java.lang.String algorithm)
                                      throws CryptoException

Encrypts a string with PBE and returns the ciphered text in BASE64 format.

Parameters:

text - the text to encrypt

passphrase - password or passphrase

seed - the seed for SecureRandom

algorithm - encryption algorithm (e.g. "PBEWithSHAAndIDEA-CBC")

Returns:

the cipherstring in BASE64 format

Throws:

CryptoException - for all encryption errors

encrypt

public static void encrypt(java.io.InputStream is,
                           java.io.DataOutputStream daos,
                           byte[] seed,
                           java.lang.StringBuffer passphrase,
                           java.lang.String algorithm,
                           int bufferlength)
                    throws CryptoException,
                           java.io.IOException

Encrypts any inputstream with PBE (password-based encryption)

Parameters:

is - any inputstream

daos - ciphered outputstream

seed - seed for SecureRandom (optional)

passphrase - the password or passphrase

algorithm - encryption algorithm (e.g. "PBEWithSHAAndIDEA-CBC")

bufferlength - buffer length in bytes

Throws:

CryptoException - for all errors

java.io.IOException

encryptFile

public static void encryptFile(java.lang.String file,
                               java.lang.String newfile,
                               java.lang.StringBuffer passphrase,
                               java.lang.String algorithm)
                        throws CryptoException,
                               java.io.IOException

Encrypts a file with PBE and creates a new file with the result.

Parameters:

file - the file to encrypt

passphrase - password or passphrase

algorithm - encryption algorithm (e.g. "PBEWithSHAAndIDEA-CBC")

Throws:

java.io.IOException - I/O errors

CryptoException - for all encryption errors

encryptFile

public static void encryptFile(java.lang.String file,
                               java.lang.String newfile,
                               java.lang.StringBuffer passphrase,
                               byte[] seed,
                               java.lang.String algorithm)
                        throws CryptoException,
                               java.io.IOException

Encrypts a file with PBE and creates a new file with the result.

Parameters:

file - the file to encrypt

newfile - the encrypted file

passphrase - password or passphrase

seed - the seed for SecureRandom

algorithm - encryption algorithm (e.g. "PBEWithSHAAndIDEA-CBC")

Throws:

java.io.IOException - I/O errors

CryptoException - for all encryption errors

decrypt

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

Decrypts a ciphertext with PBE

Parameters:

text - the ciphertext

passphrase - password or passphrase

algorithm - encryption algorithm (e.g. "PBEWithSHAAndIDEA-CBC")

Returns:

the decrypted plaintext

Throws:

CryptoException - for all encryption errors

decrypt

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

Decrypts any inputstream with PBE

Parameters:

is - the ciphered inputstream

daos - deciphered outputstream

passphrase - password or passphrase

algorithm - encryption algorithm (e.g. "PBEWithSHAAndIDEA-CBC")

bufferlength - buffer length in bytes

Throws:

CryptoException - encryption errors

java.io.IOException - I/O errors

decryptFile

public static void decryptFile(java.lang.String file,
                               java.lang.String newfile,
                               java.lang.StringBuffer passphrase,
                               java.lang.String algorithm)
                        throws CryptoException,
                               java.io.IOException

Decrypts a ciphered file with PBE

Parameters:

file - the file to decrypt

passphrase - the password or passphrase

algorithm - encryption algorithm (e.g. "PBEWithSHAAndIDEA-CBC")

Throws:

CryptoException - for all encryption errors

java.io.IOException - I/O errors