net.schmizz.sshj.common

Class SecurityUtils

java.lang.Object

net.schmizz.sshj.common.SecurityUtils

public class SecurityUtils
extends java.lang.Object

Static utility method relating to security facilities.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	BOUNCY_CASTLE Identifier for the BouncyCastle JCE provider
static java.lang.String	SPONGY_CASTLE Identifier for the BouncyCastle JCE provider

Constructor Summary

Constructors

Constructor and Description
SecurityUtils()

Method Summary

Modifier and Type	Method and Description
static javax.crypto.Cipher	getCipher(java.lang.String transformation)
static java.lang.String	getFingerprint(java.security.PublicKey key) Computes the fingerprint for a public key, in the standard SSH format, e.g.
static javax.crypto.KeyAgreement	getKeyAgreement(java.lang.String algorithm) Creates a new instance of KeyAgreement with the given algorithm.
static java.security.KeyFactory	getKeyFactory(java.lang.String algorithm) Creates a new instance of KeyFactory with the given algorithm.
static java.security.KeyPairGenerator	getKeyPairGenerator(java.lang.String algorithm) Creates a new instance of KeyPairGenerator with the given algorithm.
static javax.crypto.Mac	getMAC(java.lang.String algorithm) Create a new instance of Mac with the given algorithm.
static java.security.MessageDigest	getMessageDigest(java.lang.String algorithm) Create a new instance of MessageDigest with the given algorithm.
static java.lang.String	getSecurityProvider() Get the identifier for the registered security provider.
static java.security.Signature	getSignature(java.lang.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 boolean	registerSecurityProvider(java.lang.String providerClassName)
static void	setRegisterBouncyCastle(boolean registerBouncyCastle)
static void	setSecurityProvider(java.lang.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 java.lang.String BOUNCY_CASTLE

Identifier for the BouncyCastle JCE provider

See Also:

Constant Field Values

SPONGY_CASTLE

public static final java.lang.String SPONGY_CASTLE

Identifier for the BouncyCastle JCE provider

See Also:

Constant Field Values

Constructor Detail

SecurityUtils

public SecurityUtils()

Method Detail

registerSecurityProvider

public static boolean registerSecurityProvider(java.lang.String providerClassName)

getCipher

public static javax.crypto.Cipher getCipher(java.lang.String transformation)
                                     throws java.security.NoSuchAlgorithmException,
                                            javax.crypto.NoSuchPaddingException,
                                            java.security.NoSuchProviderException

Throws:

java.security.NoSuchAlgorithmException

javax.crypto.NoSuchPaddingException

java.security.NoSuchProviderException

getFingerprint

public static java.lang.String getFingerprint(java.security.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 javax.crypto.KeyAgreement getKeyAgreement(java.lang.String algorithm)
                                                 throws java.security.NoSuchAlgorithmException,
                                                        java.security.NoSuchProviderException

Creates a new instance of KeyAgreement with the given algorithm.

Parameters:

algorithm - key agreement algorithm

Returns:

new instance

Throws:

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

getKeyFactory

public static java.security.KeyFactory getKeyFactory(java.lang.String algorithm)
                                              throws java.security.NoSuchAlgorithmException,
                                                     java.security.NoSuchProviderException

Creates a new instance of KeyFactory with the given algorithm.

Parameters:

algorithm - key factory algorithm e.g. RSA, DSA

Returns:

new instance

Throws:

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

getKeyPairGenerator

public static java.security.KeyPairGenerator getKeyPairGenerator(java.lang.String algorithm)
                                                          throws java.security.NoSuchAlgorithmException,
                                                                 java.security.NoSuchProviderException

Creates a new instance of KeyPairGenerator with the given algorithm.

Parameters:

algorithm - key pair generator algorithm

Returns:

new instance

Throws:

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

getMAC

public static javax.crypto.Mac getMAC(java.lang.String algorithm)
                               throws java.security.NoSuchAlgorithmException,
                                      java.security.NoSuchProviderException

Create a new instance of Mac with the given algorithm.

Parameters:

algorithm - MAC algorithm

Returns:

new instance

Throws:

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

getMessageDigest

public static java.security.MessageDigest getMessageDigest(java.lang.String algorithm)
                                                    throws java.security.NoSuchAlgorithmException,
                                                           java.security.NoSuchProviderException

Create a new instance of MessageDigest with the given algorithm.

Parameters:

algorithm - MessageDigest algorithm name

Returns:

new instance

Throws:

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

getSecurityProvider

public static java.lang.String getSecurityProvider()

Get the identifier for the registered security provider.

Returns:

JCE provider identifier

getSignature

public static java.security.Signature getSignature(java.lang.String algorithm)
                                            throws java.security.NoSuchAlgorithmException,
                                                   java.security.NoSuchProviderException

Throws:

java.security.NoSuchAlgorithmException

java.security.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 (or SC on Android) registered

setRegisterBouncyCastle

public static void setRegisterBouncyCastle(boolean registerBouncyCastle)

setSecurityProvider

public static void setSecurityProvider(java.lang.String securityProvider)

Specifies the JCE security provider that should be used.

Parameters:

securityProvider - identifier for the security provider