org.jmrtd

Class AESSecureMessagingWrapper

java.lang.Object

org.jmrtd.SecureMessagingWrapper

org.jmrtd.AESSecureMessagingWrapper

All Implemented Interfaces:

java.io.Serializable, net.sf.scuba.smartcards.APDUWrapper

public class AESSecureMessagingWrapper
extends SecureMessagingWrapper
implements java.io.Serializable

An AES secure messaging wrapper for APDUs. Based on TR-SAC. FIXME: WORK IN PROGRESS

Version:

$Revision: $

Author:

Martijn Oostdijk ([email protected])

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AESSecureMessagingWrapper(javax.crypto.SecretKey ksEnc, javax.crypto.SecretKey ksMac, long sscIV, long ssc) Constructs a secure messaging wrapper based on the secure messaging session keys and the initial value of the send sequence counter.

Method Summary

Modifier and Type	Method and Description
long	getSendSequenceCounter() Gets the current value of the send sequence counter.
net.sf.scuba.smartcards.ResponseAPDU	unwrap(net.sf.scuba.smartcards.ResponseAPDU responseAPDU, int len) Unwraps the buffer of a response APDU.
net.sf.scuba.smartcards.CommandAPDU	wrap(net.sf.scuba.smartcards.CommandAPDU commandAPDU) Wraps the apdu buffer capdu of a command apdu.

Methods inherited from class java.lang.Object

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

Constructor Detail

AESSecureMessagingWrapper

public AESSecureMessagingWrapper(javax.crypto.SecretKey ksEnc,
                                 javax.crypto.SecretKey ksMac,
                                 long sscIV,
                                 long ssc)
                          throws java.security.GeneralSecurityException

Constructs a secure messaging wrapper based on the secure messaging session keys and the initial value of the send sequence counter. Used in BAC and EAC 1.

Parameters:

ksEnc - the session key for encryption

ksMac - the session key for macs

sscIV - the send sequence counter to use as initialization vector

ssc - the initial value of the send sequence counter

Throws:

java.security.GeneralSecurityException - when the available JCE providers cannot provide the necessary cryptographic primitives

Method Detail

getSendSequenceCounter

public long getSendSequenceCounter()

Gets the current value of the send sequence counter.

Specified by:

getSendSequenceCounter in class SecureMessagingWrapper

Returns:

the current value of the send sequence counter.

wrap

public net.sf.scuba.smartcards.CommandAPDU wrap(net.sf.scuba.smartcards.CommandAPDU commandAPDU)

Wraps the apdu buffer capdu of a command apdu. As a side effect, this method increments the internal send sequence counter maintained by this wrapper.

Specified by:

wrap in interface net.sf.scuba.smartcards.APDUWrapper

Parameters:

commandAPDU - buffer containing the command apdu.

Returns:

length of the command apdu after wrapping.

unwrap

public net.sf.scuba.smartcards.ResponseAPDU unwrap(net.sf.scuba.smartcards.ResponseAPDU responseAPDU,
                                                   int len)

Unwraps the buffer of a response APDU.

Specified by:

unwrap in interface net.sf.scuba.smartcards.APDUWrapper

Parameters:

responseAPDU - buffer containing the response apdu

len - length of the actual response apdu

Returns:

a new byte array containing the unwrapped buffer