com.licel.jcardsim.crypto

Class MessageDigestProxy

java.lang.Object

com.licel.jcardsim.crypto.MessageDigestProxy

public class MessageDigestProxy
extends Object

ProxyClass for MessageDigest

See Also:

MessageDigest

Constructor Summary

Constructors

Constructor and Description
MessageDigestProxy()

Method Summary

Modifier and Type	Method and Description
static javacard.security.InitializedMessageDigest	getInitializedMessageDigestInstance(byte algorithm, boolean externalAccess) Creates a InitializedMessageDigest object instance of the selected algorithm.
static javacard.security.MessageDigest	getInstance(byte algorithm, boolean externalAccess) Creates a MessageDigest object instance of the selected algorithm.

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageDigestProxy

public MessageDigestProxy()

Method Detail

getInstance

public static final javacard.security.MessageDigest getInstance(byte algorithm,
                                                                boolean externalAccess)
                                                         throws javacard.security.CryptoException

Creates a MessageDigest object instance of the selected algorithm.

Parameters:

algorithm - the desired message digest algorithm. Valid codes listed in ALG_ .. constants above, for example, ALG_SHA.

externalAccess - true indicates that the instance will be shared among multiple applet instances and that the MessageDigest instance will also be accessed (via a Shareable. interface) when the owner of the MessageDigest instance is not the currently selected applet. If true the implementation must not allocate CLEAR_ON_DESELECT transient space for internal data.

Returns:

the MessageDigest object instance of the requested algorithm

Throws:

javacard.security.CryptoException - with the following reason codes:

• CryptoException.NO_SUCH_ALGORITHM if the requested algorithm or shared access mode is not supported.

getInitializedMessageDigestInstance

public static final javacard.security.InitializedMessageDigest getInitializedMessageDigestInstance(byte algorithm,
                                                                                                   boolean externalAccess)
                                                                                            throws javacard.security.CryptoException

Creates a InitializedMessageDigest object instance of the selected algorithm.

Parameters:

algorithm - the desired message digest algorithm. Valid codes listed in ALG_* constants above, for example, MessageDigest.ALG_SHA.

externalAccess - true indicates that the instance will be shared among multiple applet instances and that the InitializedMessageDigest instance will also be accessed (via a Shareable. interface) when the owner of the InitializedMessageDigest instance is not the currently selected applet. If true the implementation must not allocate CLEAR_ON_DESELECT transient space for internal data.

Returns:

the InitializedMessageDigest object instance of the requested algorithm

Throws:

javacard.security.CryptoException - with the following reason codes: CryptoException.NO_SUCH_ALGORITHM if the requested algorithm or shared access mode is not supported.

Since:

2.2.2