net.schmizz.sshj.common
Class SecurityUtils

java.lang.Object
  extended by net.schmizz.sshj.common.SecurityUtils

public class SecurityUtils
extends Object

Static utility method relating to security facilities.


Field Summary
static String BOUNCY_CASTLE
          Identifier for the BouncyCastle JCE provider
 
Constructor Summary
SecurityUtils()
           
 
Method Summary
static Cipher getCipher(String transformation)
           
static String getFingerprint(PublicKey key)
          Computes the fingerprint for a public key, in the standard SSH format, e.g.
static KeyAgreement getKeyAgreement(String algorithm)
          Creates a new instance of KeyAgreement with the given algorithm.
static KeyFactory getKeyFactory(String algorithm)
          Creates a new instance of KeyFactory with the given algorithm.
static KeyPairGenerator getKeyPairGenerator(String algorithm)
          Creates a new instance of KeyPairGenerator with the given algorithm.
static Mac getMAC(String algorithm)
          Create a new instance of Mac with the given algorithm.
static MessageDigest getMessageDigest(String algorithm)
          Create a new instance of MessageDigest with the given algorithm.
static String getSecurityProvider()
          Get the identifier for the registered security provider.
static Signature getSignature(String algorithm)
           
static boolean isBouncyCastleRegistered()
          Attempts registering BouncyCastle as security provider if it has not been previously attempted and returns whether the registration succeeded.
static void setRegisterBouncyCastle(boolean registerBouncyCastle)
           
static void setSecurityProvider(String securityProvider)
          Specifies the JCE security provider that should be used.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

BOUNCY_CASTLE

public static final String BOUNCY_CASTLE
Identifier for the BouncyCastle JCE provider

See Also:
Constant Field Values
Constructor Detail

SecurityUtils

public SecurityUtils()
Method Detail

getCipher

public static Cipher getCipher(String transformation)
                        throws NoSuchAlgorithmException,
                               NoSuchPaddingException,
                               NoSuchProviderException
Throws:
NoSuchAlgorithmException
NoSuchPaddingException
NoSuchProviderException

getFingerprint

public static String getFingerprint(PublicKey key)
Computes the fingerprint for a public key, in the standard SSH format, e.g. "4b:69:6c:72:6f:79:20:77:61:73:20:68:65:72:65:21"

Parameters:
key - the public key
Returns:
the fingerprint
See Also:
specification

getKeyAgreement

public static KeyAgreement getKeyAgreement(String algorithm)
                                    throws NoSuchAlgorithmException,
                                           NoSuchProviderException
Creates a new instance of KeyAgreement with the given algorithm.

Parameters:
algorithm - key agreement algorithm
Returns:
new instance
Throws:
NoSuchAlgorithmException
NoSuchProviderException

getKeyFactory

public static KeyFactory getKeyFactory(String algorithm)
                                throws NoSuchAlgorithmException,
                                       NoSuchProviderException
Creates a new instance of KeyFactory with the given algorithm.

Parameters:
algorithm - key factory algorithm e.g. RSA, DSA
Returns:
new instance
Throws:
NoSuchAlgorithmException
NoSuchProviderException

getKeyPairGenerator

public static KeyPairGenerator getKeyPairGenerator(String algorithm)
                                            throws NoSuchAlgorithmException,
                                                   NoSuchProviderException
Creates a new instance of KeyPairGenerator with the given algorithm.

Parameters:
algorithm - key pair generator algorithm
Returns:
new instance
Throws:
NoSuchAlgorithmException
NoSuchProviderException

getMAC

public static Mac getMAC(String algorithm)
                  throws NoSuchAlgorithmException,
                         NoSuchProviderException
Create a new instance of Mac with the given algorithm.

Parameters:
algorithm - MAC algorithm
Returns:
new instance
Throws:
NoSuchAlgorithmException
NoSuchProviderException

getMessageDigest

public static MessageDigest getMessageDigest(String algorithm)
                                      throws NoSuchAlgorithmException,
                                             NoSuchProviderException
Create a new instance of MessageDigest with the given algorithm.

Parameters:
algorithm - MessageDigest algorithm name
Returns:
new instance
Throws:
NoSuchAlgorithmException
NoSuchProviderException

getSecurityProvider

public static String getSecurityProvider()
Get the identifier for the registered security provider.

Returns:
JCE provider identifier

getSignature

public static Signature getSignature(String algorithm)
                              throws NoSuchAlgorithmException,
                                     NoSuchProviderException
Throws:
NoSuchAlgorithmException
NoSuchProviderException

isBouncyCastleRegistered

public static boolean isBouncyCastleRegistered()
Attempts registering BouncyCastle as security provider if it has not been previously attempted and returns whether the registration succeeded.

Returns:
whether BC registered

setRegisterBouncyCastle

public static void setRegisterBouncyCastle(boolean registerBouncyCastle)

setSecurityProvider

public static void setSecurityProvider(String securityProvider)
Specifies the JCE security provider that should be used.

Parameters:
securityProvider - identifier for the security provider


Copyright © 2009-2012. All Rights Reserved.