net.rim.device.api.crypto
Class AbstractMAC

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

Direct Known Subclasses:

CBCMAC, HMAC, NullMAC

public abstract class AbstractMAC
extends Object

Implements the helper methods of the MAC interface.

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	AbstractMAC() Creates a new AbstractMAC object.

Method Summary
	boolean	checkMAC(byte[] mac) Returns true if the MAC calculated so far is the same as the given MAC.
	boolean	checkMAC(byte[] mac, boolean reset) Returns true if the MAC calculated so far is the same as the given MAC.
	boolean	checkMAC(byte[] mac, int offset) Returns true if the MAC calculated so far is the same as the given MAC.
	boolean	checkMAC(byte[] mac, int offset, boolean reset) Returns true if the MAC calculated so far is the same as the given MAC.
	abstract String	getAlgorithm() Returns the name of the digest or block cipher used, such as "HMAC".
	abstract int	getLength() Returns the length, in bytes, of the MAC.
	byte[]	getMAC() Returns a byte array containing the MAC of all the input data since the last reset.
	byte[]	getMAC(boolean reset) Returns a byte array containing the MAC of all the input data since the last reset.
	int	getMAC(byte[] buffer, int offset) Puts the MAC of all the input data since the last reset into the given buffer starting at the specified offset.
	abstract int	getMAC(byte[] buffer, int offset, boolean reset) Puts the MAC of all the input data since the last reset into the given buffer starting at the specified offset.
	abstract void	reset() Reinitializes the MAC.
	void	update(byte[] data) Feeds more data into the MAC algorithm.
	abstract void	update(byte[] data, int offset, int length) Feeds more data into the MAC algorithm.
	void	update(int data) Feeds more data into the MAC algorithm.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractMAC

protected AbstractMAC()

Creates a new AbstractMAC object.

This is the default constructor.

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 abstract String getAlgorithm()

Returns the name of the digest or block cipher used, such as "HMAC".

Returns:

A String representing the name of the digest or cipher.

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

reset

public abstract void reset()
                    throws CryptoTokenException

Reinitializes the MAC.

Throws:

CryptoTokenException - Thrown if an error occurs with the 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

update

public void update(int data)
            throws CryptoTokenException

Feeds more data into the MAC algorithm.

Parameters:

data - A byte of input data.

Throws:

CryptoTokenException - Thrown when a problem 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

update

public void update(byte[] data)
            throws CryptoTokenException

Feeds more data into the MAC algorithm.

Parameters:

data - The array containing the input data. The entire array is added to the MAC.

Throws:

CryptoTokenException - Thrown when a problem 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

update

public abstract void update(byte[] data,
                            int offset,
                            int length)
                     throws CryptoTokenException

Feeds more data into the MAC algorithm.

Parameters:

data - The array containing the input data.

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

length - The length of the input data, in bytes.

Throws:

CryptoTokenException - Thrown when a problem 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

getLength

public abstract int getLength()

Returns the length, in bytes, of the MAC.

Returns:

An integer that represents the length of the MAC.

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

getMAC

public byte[] getMAC()
              throws CryptoTokenException

Returns a byte array containing the MAC of all the input data since the last reset. The MAC is then reset.

Returns:

A byte array containing the MAC.

Throws:

CryptoTokenException - Thrown when a problem 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

getMAC

public byte[] getMAC(boolean reset)
              throws CryptoTokenException

Returns a byte array containing the MAC of all the input data since the last reset.

Parameters:

reset - if true then the MAC is reset.

Returns:

A byte array containing the MAC.

Throws:

CryptoTokenException - Thrown when a problem 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

getMAC

public int getMAC(byte[] buffer,
                  int offset)
           throws CryptoTokenException

Puts the MAC of all the input data since the last reset into the given buffer starting at the specified offset. The MAC is then reset.

Parameters:

buffer - The array to contain the MAC.

offset - The offset, or initial position, of teh MAC data within the buffer.

Returns:

An integer representing the number of bytes written to the buffer.

Throws:

CryptoTokenException - Thrown when a problem 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

getMAC

public abstract int getMAC(byte[] buffer,
                           int offset,
                           boolean reset)
                    throws CryptoTokenException

Puts the MAC of all the input data since the last reset into the given buffer starting at the specified offset. The MAC is then reset.

Parameters:

buffer - The array to contain the MAC.

offset - The offset, or initial position, of teh MAC data within the buffer.

reset - If true then the MAC is reset.

Returns:

An integer representing the number of bytes written to the buffer.

Throws:

CryptoTokenException - Thrown when a problem 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

checkMAC

public boolean checkMAC(byte[] mac)
                 throws CryptoTokenException

Returns true if the MAC calculated so far is the same as the given MAC. The MAC is then reset.

Parameters:

mac - The MAC to check against.

Returns:

Returns true if the MAC verifies.

Throws:

CryptoTokenException - Thrown when a problem 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

checkMAC

public boolean checkMAC(byte[] mac,
                        boolean reset)
                 throws CryptoTokenException

Returns true if the MAC calculated so far is the same as the given MAC.

Parameters:

mac - The MAC to check against.

reset - if true then the MAC is reset.

Returns:

Returns true if the MAC verifies.

Throws:

CryptoTokenException - Thrown when a problem 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

checkMAC

public boolean checkMAC(byte[] mac,
                        int offset)
                 throws CryptoTokenException

Returns true if the MAC calculated so far is the same as the given MAC. The MAC is then reset.

Parameters:

mac - The array containing the MAC to check against.

offset - The starting offset of the MAC in the array.

Returns:

Returns true if the MAC verifies.

Throws:

CryptoTokenException - Thrown when a problem 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

checkMAC

public boolean checkMAC(byte[] mac,
                        int offset,
                        boolean reset)
                 throws CryptoTokenException

Returns true if the MAC calculated so far is the same as the given MAC.

Parameters:

mac - The array containing the MAC to check against.

offset - The starting offset of the MAC in the array.

reset - if true then the MAC is reset.

Returns:

Returns true if the MAC verifies.

Throws:

CryptoTokenException - Thrown when a problem 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