core.crypto
Class Asymmetric

java.lang.Object
  core.crypto.Asymmetric

public class Asymmetric
extends Object

A static class providing all asymmetric cipher operations

  Copyright (c) 2006 Sebastian Erdweg
  Copyright (c) 2006 Dominik Schulz
  Copyright (c) 2006 Florian Lindner
  Copyright (c) 2006 Betim Berjani
  
  This file is part of FlexiCrypt.

  FlexiCrypt is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  FlexiCrypt is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with FlexiCrypt; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  

Author:

Dominik, Sebastian

Field Summary

static String	CERT_END_TAG
static String	CERT_START_TAG
static String	MODE_PADDING

Method Summary

static byte[]	decrypt(byte[] in, PrivateKey privateKey, int buffersize)
static void	decrypt(File inputFile, File outputFile, PrivateKey privateKey, int buffersize)
static void	decrypt(InputStream fis, OutputStream fos, PrivateKey privateKey, int buffersize)
static String	decrypt(String in, PrivateKey privateKey, int buffersize)
static byte[]	encrypt(byte[] in, PublicKey publicKey, int buffersize)
static void	encrypt(File inputFile, File outputFile, PublicKey publicKey, int buffersize)
static void	encrypt(InputStream fis, OutputStream fos, PublicKey publicKey, int buffersize)
static String	encrypt(String in, PublicKey publicKey, int buffersize)
static KeyPair	getNewKeyPair(String algorithm, int keysize) This Method generats a new KeyPair
static KeyStore.PrivateKeyEntry	getNewPrivateKeyEntry(String asymAlgo, String signAlgo, int keysize, Calendar notBefore, Calendar notAfter, int usage, boolean isUsageCritical, int extendedUsage, boolean isExtendedUsageCritical, boolean isCA, boolean isCACritical, String commonName, String country, String email, String locationCity, String organization, String organizationUnit) erzeugt einen privatekeyentry unter angabe aller details
static KeyStore.PrivateKeyEntry	getNewPrivateKeyEntry(String asymAlgo, String signAlgo, int keysize, Principal principal, String email, Calendar notBefore, Calendar notAfter, int usage, boolean isUsageCritical, int extendedUsage, boolean isExtendedUsageCritical, boolean isCA, boolean isCACritical) Constructs a private key entry with a self-signed cert.
static KeyStore.PrivateKeyEntry	getNewPrivateKeyEntry(String asymAlgo, String signAlgo, int keysize, Principal principal, String email, Calendar notBefore, Calendar notAfter, int usage, boolean isUsageCritical, int extendedUsage, boolean isExtendedUsageCritical, boolean isCA, boolean isCACritical, PrivateKey signWith, X509Certificate signersCert)
static HashMap<String,Set<Integer>>	getValidServices() Creates a set of valid asymmetric algorithms
static boolean	isValidKeySize(String algorithm, int keysize)

Methods inherited from class java.lang.Object

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

Field Detail

CERT_START_TAG

public static final String CERT_START_TAG

See Also:

Constant Field Values

CERT_END_TAG

public static final String CERT_END_TAG

See Also:

Constant Field Values

MODE_PADDING

public static final String MODE_PADDING

See Also:

Constant Field Values

Method Detail

encrypt

public static byte[] encrypt(byte[] in,
                             PublicKey publicKey,
                             int buffersize)
                      throws InvalidKeyException,
                             NoSuchAlgorithmException,
                             NoSuchPaddingException,
                             IOException,
                             InterruptedException,
                             IllegalBlockSizeException,
                             BadPaddingException

Parameters:

in -

publicKey -

buffersize -

Returns:

Throws:

InvalidKeyException

NoSuchAlgorithmException

NoSuchPaddingException

IOException

InterruptedException

BadPaddingException

IllegalBlockSizeException

encrypt

public static String encrypt(String in,
                             PublicKey publicKey,
                             int buffersize)
                      throws InvalidKeyException,
                             NoSuchAlgorithmException,
                             NoSuchPaddingException,
                             IOException,
                             InterruptedException,
                             IllegalBlockSizeException,
                             BadPaddingException

Parameters:

in -

publicKey -

buffersize -

Returns:

Throws:

InvalidKeyException

NoSuchAlgorithmException

NoSuchPaddingException

IOException

InterruptedException

BadPaddingException

IllegalBlockSizeException

encrypt

public static void encrypt(File inputFile,
                           File outputFile,
                           PublicKey publicKey,
                           int buffersize)
                    throws FileNotFoundException,
                           NoSuchPaddingException,
                           NoSuchAlgorithmException,
                           InvalidKeyException,
                           IOException,
                           InterruptedException,
                           IllegalBlockSizeException,
                           BadPaddingException

Parameters:

inputFile -

outputFile -

publicKey -

buffersize -

Throws:

FileNotFoundException

NoSuchPaddingException

NoSuchAlgorithmException

InvalidKeyException

IOException

InterruptedException

BadPaddingException

IllegalBlockSizeException

encrypt

public static void encrypt(InputStream fis,
                           OutputStream fos,
                           PublicKey publicKey,
                           int buffersize)
                    throws NoSuchAlgorithmException,
                           NoSuchPaddingException,
                           InvalidKeyException,
                           IOException,
                           InterruptedException,
                           IllegalBlockSizeException,
                           BadPaddingException

Parameters:

fis -

fos -

publicKey -

buffersize -

Throws:

NoSuchAlgorithmException

NoSuchPaddingException

InvalidKeyException

IOException

InterruptedException

BadPaddingException

IllegalBlockSizeException

decrypt

public static byte[] decrypt(byte[] in,
                             PrivateKey privateKey,
                             int buffersize)
                      throws InvalidKeyException,
                             NoSuchAlgorithmException,
                             NoSuchPaddingException,
                             IOException,
                             InterruptedException

Parameters:

in -

privateKey -

buffersize -

Returns:

Throws:

InvalidKeyException

NoSuchAlgorithmException

NoSuchPaddingException

IOException

InterruptedException

decrypt

public static String decrypt(String in,
                             PrivateKey privateKey,
                             int buffersize)
                      throws InvalidKeyException,
                             NoSuchAlgorithmException,
                             NoSuchPaddingException,
                             IOException,
                             InterruptedException

Parameters:

in -

privateKey -

buffersize -

Returns:

Throws:

InvalidKeyException

NoSuchAlgorithmException

NoSuchPaddingException

IOException

InterruptedException

decrypt

public static void decrypt(File inputFile,
                           File outputFile,
                           PrivateKey privateKey,
                           int buffersize)
                    throws FileNotFoundException,
                           NoSuchPaddingException,
                           NoSuchAlgorithmException,
                           InvalidKeyException,
                           IOException,
                           InterruptedException

Parameters:

inputFile -

outputFile -

privateKey -

buffersize -

Throws:

FileNotFoundException

NoSuchPaddingException

NoSuchAlgorithmException

InvalidKeyException

IOException

InterruptedException

decrypt

public static void decrypt(InputStream fis,
                           OutputStream fos,
                           PrivateKey privateKey,
                           int buffersize)
                    throws NoSuchAlgorithmException,
                           NoSuchPaddingException,
                           InvalidKeyException,
                           IOException,
                           InterruptedException

Parameters:

fis -

fos -

privateKey -

buffersize -

Throws:

NoSuchAlgorithmException

NoSuchPaddingException

InvalidKeyException

IOException

InterruptedException

getNewPrivateKeyEntry

public static KeyStore.PrivateKeyEntry getNewPrivateKeyEntry(String asymAlgo,
                                                             String signAlgo,
                                                             int keysize,
                                                             Principal principal,
                                                             String email,
                                                             Calendar notBefore,
                                                             Calendar notAfter,
                                                             int usage,
                                                             boolean isUsageCritical,
                                                             int extendedUsage,
                                                             boolean isExtendedUsageCritical,
                                                             boolean isCA,
                                                             boolean isCACritical)
                                                      throws NoSuchAlgorithmException,
                                                             Exception

Constructs a private key entry with a self-signed cert.

Parameters:

asymAlgo -

keysize -

principal -

notBefore -

notAfter -

usage -

Returns:

Throws:

NoSuchAlgorithmException

Exception

getNewPrivateKeyEntry

public static KeyStore.PrivateKeyEntry getNewPrivateKeyEntry(String asymAlgo,
                                                             String signAlgo,
                                                             int keysize,
                                                             Principal principal,
                                                             String email,
                                                             Calendar notBefore,
                                                             Calendar notAfter,
                                                             int usage,
                                                             boolean isUsageCritical,
                                                             int extendedUsage,
                                                             boolean isExtendedUsageCritical,
                                                             boolean isCA,
                                                             boolean isCACritical,
                                                             PrivateKey signWith,
                                                             X509Certificate signersCert)
                                                      throws NoSuchAlgorithmException,
                                                             Exception

Throws:

NoSuchAlgorithmException

Exception

getNewPrivateKeyEntry

public static KeyStore.PrivateKeyEntry getNewPrivateKeyEntry(String asymAlgo,
                                                             String signAlgo,
                                                             int keysize,
                                                             Calendar notBefore,
                                                             Calendar notAfter,
                                                             int usage,
                                                             boolean isUsageCritical,
                                                             int extendedUsage,
                                                             boolean isExtendedUsageCritical,
                                                             boolean isCA,
                                                             boolean isCACritical,
                                                             String commonName,
                                                             String country,
                                                             String email,
                                                             String locationCity,
                                                             String organization,
                                                             String organizationUnit)
                                                      throws NoSuchAlgorithmException,
                                                             Exception

erzeugt einen privatekeyentry unter angabe aller details

Parameters:

asymAlgo -

keysize -

notBefore -

notAfter -

usage -

commonName -

country -

email -

locationCity -

organization -

organizationUnit -

Returns:

Throws:

NoSuchAlgorithmException

Exception

getNewKeyPair

public static KeyPair getNewKeyPair(String algorithm,
                                    int keysize)
                             throws NoSuchAlgorithmException

This Method generats a new KeyPair

Parameters:

algorithm -

keysize -

Returns:

Throws:

NoSuchAlgorithmException

isValidKeySize

public static boolean isValidKeySize(String algorithm,
                                     int keysize)
                              throws NoSuchAlgorithmException

Parameters:

algorithm -

keysize -

Returns:

true if this algorithm with this keysize could be generated

Throws:

NoSuchAlgorithmException - if this algorithm keysize combination is not possible

getValidServices

public static HashMap<String,Set<Integer>> getValidServices()

Creates a set of valid asymmetric algorithms

Returns:

a set of valid asymmetric algorithms