net.sourceforge.jcetaglib.lib
Class Crypt

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

public class Crypt

extends java.lang.Object

Symmetric block/stream cipher encryption & decryption routines for use with BouncyCastle JCE provider

Version:

$Id: Crypt.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

Crypt()

Method Summary

static void	decrypt(java.io.InputStream is, java.io.DataOutputStream daos, java.security.Key secretKey, java.lang.String algorithm, java.lang.String mode, java.lang.String padding, int bufferlength) Decrypts any inputstream with a symmetric key
static java.lang.StringBuffer	decrypt(java.lang.StringBuffer text, java.security.Key secretKey, java.lang.String algorithm, java.lang.String mode, java.lang.String padding) Decrypts a message with a symmetric key
static java.lang.StringBuffer	decrypt(java.lang.StringBuffer text, java.lang.String keyfile, java.lang.StringBuffer passphrase, java.lang.String algorithm, java.lang.String mode, java.lang.String padding) Decrypts a message with a symmetric key
static void	decryptFile(java.lang.String file, java.lang.String newfile, java.lang.String keyfile, java.lang.StringBuffer passphrase, java.lang.String algorithm, java.lang.String mode, java.lang.String padding) Decrypts a file with a symmetric key
static void	encrypt(java.io.InputStream is, java.io.DataOutputStream daos, java.security.Key secretKey, java.lang.String algorithm, java.lang.String mode, java.lang.String padding, byte[] seed, int bufferlength) Encrypts any inputstream with a symmetric key
static java.lang.StringBuffer	encrypt(java.lang.StringBuffer text, java.security.Key secretKey, java.lang.String algorithm, java.lang.String mode, java.lang.String padding, byte[] seed) Encrypts a message with a symmetric key
static java.lang.StringBuffer	encrypt(java.lang.StringBuffer text, java.lang.String keyfile, java.lang.StringBuffer passphrase, java.lang.String algorithm, java.lang.String mode, java.lang.String padding, byte[] seed) Encrypts a message with a symmetric key
static void	encryptFile(java.lang.String file, java.lang.String newfile, java.lang.String keyfile, java.lang.StringBuffer passphrase, java.lang.String algorithm, java.lang.String mode, java.lang.String padding, byte[] seed) Encrypts a file with a symmetric key

Methods inherited from class java.lang.Object

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

Constructor Detail

Crypt

public Crypt()

Method Detail

encrypt

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

Encrypts a message with a symmetric key

Parameters:

text - the message to encrypt

keyfile - keyfile(name)

passphrase - the passphrase for the keystore

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

mode - encryption mode (e.g. "CBC")

padding - padding scheme (e.g."PKCS7Padding")

seed - seed for SecureRandom (optional)

Returns:

encrypted message in BASE64

Throws:

CryptoException - for encryption errors

KeystoreException - when keystore could not be loaded

encrypt

public static java.lang.StringBuffer encrypt(java.lang.StringBuffer text,
                                             java.security.Key secretKey,
                                             java.lang.String algorithm,
                                             java.lang.String mode,
                                             java.lang.String padding,
                                             byte[] seed)
                                      throws CryptoException

Encrypts a message with a symmetric key

Parameters:

text - the message to encrypt

secretKey - the secret key

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

mode - encryption mode (e.g. "CBC")

padding - padding scheme (e.g."PKCS7Padding")

seed - seed for SecureRandom (optional)

Returns:

encrypted message in BASE64

Throws:

CryptoException - for encryption errors

encryptFile

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

Encrypts a file with a symmetric key

Parameters:

file - the file to encrypt

newfile - the encrypted file

keyfile - keyfile(name)

passphrase - the passphrase for the keystore

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

mode - encryption mode (e.g. "CBC")

padding - padding scheme (e.g."PKCS7Padding")

seed - seed for SecureRandom (optional)

Throws:

CryptoException - encryption errors

java.io.IOException - I/O errors

KeystoreException - when keystore could not be loaded

encrypt

public static void encrypt(java.io.InputStream is,
                           java.io.DataOutputStream daos,
                           java.security.Key secretKey,
                           java.lang.String algorithm,
                           java.lang.String mode,
                           java.lang.String padding,
                           byte[] seed,
                           int bufferlength)
                    throws CryptoException,
                           java.io.IOException

Encrypts any inputstream with a symmetric key

Parameters:

is - the inputstream to encrypt

daos - the encrypted outputstream

secretKey - the secret key

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

mode - encryption mode (e.g. "CBC")

padding - padding scheme (e.g."PKCS7Padding")

seed - seed for SecureRandom (optional)

bufferlength - buffer length in bytes

Throws:

CryptoException - for encryption errors

java.io.IOException - I/O errors

decrypt

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

Decrypts a message with a symmetric key

Parameters:

text - the message to decrypt in BASE64 format

keyfile - keyfile(name)

passphrase - the passphrase for the keystore

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

mode - encryption mode (e.g. "CBC")

padding - padding scheme (e.g."PKCS7Padding")

Returns:

deciphered message

Throws:

CryptoException - for encryption errors

KeystoreException - when keystore could not be loaded

decrypt

public static java.lang.StringBuffer decrypt(java.lang.StringBuffer text,
                                             java.security.Key secretKey,
                                             java.lang.String algorithm,
                                             java.lang.String mode,
                                             java.lang.String padding)
                                      throws CryptoException

Decrypts a message with a symmetric key

Parameters:

text - the message to decrypt in BASE64 format

secretKey - the secret key

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

mode - encryption mode (e.g. "CBC")

padding - padding scheme (e.g."PKCS7Padding")

Returns:

deciphered message

Throws:

CryptoException - for encryption errors

decryptFile

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

Decrypts a file with a symmetric key

Parameters:

file - the file to decrypt

newfile - the deciphered file

keyfile - keyfile(name)

passphrase - the passphrase for the keystore

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

mode - encryption mode (e.g. "CBC")

padding - padding scheme (e.g."PKCS7Padding")

Throws:

CryptoException - encryption errors

java.io.IOException - I/O errors

KeystoreException

decrypt

public static void decrypt(java.io.InputStream is,
                           java.io.DataOutputStream daos,
                           java.security.Key secretKey,
                           java.lang.String algorithm,
                           java.lang.String mode,
                           java.lang.String padding,
                           int bufferlength)
                    throws CryptoException,
                           java.io.IOException

Decrypts any inputstream with a symmetric key

Parameters:

is - the inputstream to decrypt

daos - the deciphered outputstream

secretKey - the secret key

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

mode - String encryption mode (e.g. "CBC")

padding - String padding scheme (e.g."PKCS7Padding")

bufferlength - buffer length in bytes

Throws:

CryptoException - for encryption errors

java.io.IOException - I/O errors