net.rim.device.api.crypto
Class SkipjackCryptoToken

java.lang.Object
  net.rim.device.api.crypto.SkipjackCryptoToken

All Implemented Interfaces:

CryptoToken, SymmetricCryptoToken, Persistable

public abstract class SkipjackCryptoToken
extends Object
implements SymmetricCryptoToken, Persistable

Represents a Skipjack crypto token.

The Skipjack algorithm specification can be found here Note: This class must be extended in order to override the default implementation.

Note: It is considered good practice to implement the equals and hashCode methods when extending this class. Otherwise, odd behaviour can occur.

See also Details on implementing for smart cards.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

Constructor Summary
	protected	SkipjackCryptoToken() Creates a new SkipJackCryptoToken object.

Method Summary
	CryptoTokenSymmetricKeyData	createKey() Creates a new key.
	void	decrypt(CryptoTokenCipherContext context, byte[] ciphertext, int ciphertextOffset, byte[] plaintext, int plaintextOffset) Decrypts data given an array of plaintext and a context.
	void	deleteKey(CryptoTokenSymmetricKeyData data) Delete the specified key on the crypto token.
	void	encrypt(CryptoTokenCipherContext context, byte[] plaintext, int plaintextOffset, byte[] ciphertext, int ciphertextOffset) Encrypts data given an array of plaintext and a context.
	byte[]	extractKeyData(CryptoTokenSymmetricKeyData data) Extracts the key data from the crypto token and returns it in a byte array.
	String	getAlgorithm() Returns the algorithm supported by this token, ie "Skipjack".
	CryptoTokenCipherContext	initializeDecrypt(CryptoTokenSymmetricKeyData data) Initializes the crypto token for decryption.
	CryptoTokenCipherContext	initializeEncrypt(CryptoTokenSymmetricKeyData data) Initializes the token for encryption.
	CryptoTokenSymmetricKeyData	injectKey(byte[] key, int offset) Inserts the specified key onto the crypto token.
	boolean	providesUserAuthentication() Returns true if the token provides its own user authentication checks, eg a smartcard will prompt for a password before allowing access to the keys.

Methods inherited from class java.lang.Object

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

Constructor Detail

SkipjackCryptoToken

protected SkipjackCryptoToken()

Creates a new SkipJackCryptoToken object.

This constructor is not used.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

Method Detail

getAlgorithm

public final String getAlgorithm()

Returns the algorithm supported by this token, ie "Skipjack".

Specified by:

getAlgorithm in interface CryptoToken

Returns:

A String that represents the name of the algorithm.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

providesUserAuthentication

public boolean providesUserAuthentication()

Returns true if the token provides its own user authentication checks, eg a smartcard will prompt for a password before allowing access to the keys. This default implementation returns false.

Specified by:

providesUserAuthentication in interface CryptoToken

Returns:

true if the user will be authenticated by the token itself.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

initializeEncrypt

public CryptoTokenCipherContext initializeEncrypt(CryptoTokenSymmetricKeyData data)
                                           throws CryptoTokenException,
                                                  CryptoUnsupportedOperationException

Initializes the token for encryption.

Parameters:

data - The key data contained on the crypto token.

Returns:

A crypto token cipher context.

Throws:

CryptoTokenException - Thrown if an error occurs with a crypto token or the crypto token is invalid.

CryptoUnsupportedOperationException - Thrown if a call is made to an unsupported operation.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

encrypt

public void encrypt(CryptoTokenCipherContext context,
                    byte[] plaintext,
                    int plaintextOffset,
                    byte[] ciphertext,
                    int ciphertextOffset)
             throws CryptoTokenException

Encrypts data given an array of plaintext and a context.

Parameters:

context - The cipher context.

plaintext - A byte array containing the plaintext.

plaintextOffset - The offset, or initial position, of the plaintext data within the array.

ciphertext - A byte array containing the ciphertext.

ciphertextOffset - The offset, or initial position, of the ciphertext within the array.

Throws:

CryptoTokenException - Thrown if an error occurs with a crypto token or the crypto token is invalid.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

initializeDecrypt

public CryptoTokenCipherContext initializeDecrypt(CryptoTokenSymmetricKeyData data)
                                           throws CryptoTokenException,
                                                  CryptoUnsupportedOperationException

Initializes the crypto token for decryption.

Parameters:

data - The symmetric key data used to encrypt the plaintext.

Returns:

The crypto token cipher context.

Throws:

CryptoTokenException - Thrown if an error occurs with a crypto token or the crypto token is invalid.

CryptoUnsupportedOperationException - Thrown if a call is made to an unsupported operation.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

decrypt

public void decrypt(CryptoTokenCipherContext context,
                    byte[] ciphertext,
                    int ciphertextOffset,
                    byte[] plaintext,
                    int plaintextOffset)
             throws CryptoTokenException

Decrypts data given an array of plaintext and a context.

Parameters:

context - The cipher context.

ciphertext - A byte array containing the ciphertext.

ciphertextOffset - The offset, or initial position, of the ciphertext within the array.

plaintext - A byte array to contain the plaintext.

plaintextOffset - The offset, or initial position, of the plaintext data within the array.

Throws:

CryptoTokenException - Thrown if an error occurs with a crypto token or the crypto token is invalid.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

extractKeyData

public byte[] extractKeyData(CryptoTokenSymmetricKeyData data)
                      throws CryptoTokenException,
                             CryptoUnsupportedOperationException

Extracts the key data from the crypto token and returns it in a byte array.

Parameters:

data - The symmetric key data contained within the token.

Returns:

A byte array containing teh key data.

Throws:

CryptoTokenException - Thrown if an error occurs with a crypto token or the crypto token is invalid.

CryptoUnsupportedOperationException - Thrown if a call is made to an unsupported operation.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

createKey

public CryptoTokenSymmetricKeyData createKey()
                                      throws CryptoTokenException,
                                             CryptoUnsupportedOperationException

Creates a new key.

Returns:

The symmetric key.

Throws:

CryptoTokenException - Thrown if an error occurs with a crypto token or the crypto token is invalid.

CryptoUnsupportedOperationException - Thrown if a call is made to an unsupported operation.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

injectKey

public CryptoTokenSymmetricKeyData injectKey(byte[] key,
                                             int offset)
                                      throws CryptoTokenException,
                                             CryptoUnsupportedOperationException

Inserts the specified key onto the crypto token.

Parameters:

key - A byte array containing the key data to be injected.

offset - The offset, or start position, of the key data within the array.

Returns:

The symmetric key data.

Throws:

CryptoTokenException - Thrown if an error occurs with a crypto token or the crypto token is invalid.

CryptoUnsupportedOperationException - Thrown if a call is made to an unsupported operation.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

deleteKey

public void deleteKey(CryptoTokenSymmetricKeyData data)
               throws CryptoTokenException,
                      CryptoUnsupportedOperationException

Delete the specified key on the crypto token.

Parameters:

data - The symmetric key data contained within the token.

Throws:

CryptoTokenException - Thrown if an error occurs with a crypto token or the crypto token is invalid.

CryptoUnsupportedOperationException - Thrown if a call is made to an unsupported operation.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0