Package org.jmrtd.protocol

Class EACCAProtocol

java.lang.Object

org.jmrtd.protocol.EACCAProtocol

public class EACCAProtocol
extends Object

The EAC Chip Authentication protocol (version 1).

Since:

0.5.6

Version:

$Revision: 1805 $

Author:

The JMRTD team ([email protected])

Constructor Summary

Constructors

Constructor	Description
EACCAProtocol(APDULevelEACCACapable service, SecureMessagingWrapper wrapper, int maxTranceiveLength, boolean shouldCheckMAC)	Constructs a protocol instance.

Method Summary

Modifier and Type	Method	Description
static byte[]	computeSharedSecret(String agreementAlg, PublicKey piccPublicKey, PrivateKey pcdPrivateKey)	Performs the key agreement step.
EACCAResult	doCA(BigInteger keyId, String oid, String publicKeyOID, PublicKey piccPublicKey)	Perform EAC-CA (Chip Authentication) part of EAC (version 1).
static byte[]	getKeyHash(String agreementAlg, PublicKey pcdPublicKey)	Returns the key hash which will be used as input for Terminal Authentication.
SecureMessagingWrapper	getWrapper()	Returns the secure messaging wrapper currently in use.
static SecureMessagingWrapper	restartSecureMessaging(String oid, byte[] sharedSecret, int maxTranceiveLength, boolean shouldCheckMAC)	Restarts secure messaging based on the shared secret.
static void	sendPublicKey(APDULevelEACCACapable service, SecureMessagingWrapper wrapper, String oid, BigInteger keyId, PublicKey pcdPublicKey)	Sends the PCD's public key to the PICC.

Methods inherited from class java.lang.Object

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

Constructor Detail

EACCAProtocol

public EACCAProtocol(APDULevelEACCACapable service,
                     SecureMessagingWrapper wrapper,
                     int maxTranceiveLength,
                     boolean shouldCheckMAC)

Constructs a protocol instance.

Parameters:

service - the card service

wrapper - the existing secure messaging wrapper

maxTranceiveLength - the maximal tranceive length (on responses to READ BINARY) to use in the resulting secure messaging channel

shouldCheckMAC - whether the resulting secure messaging channel should apply strict MAC checking on response APDUs

Method Detail

doCA

public EACCAResult doCA(BigInteger keyId,
                        String oid,
                        String publicKeyOID,
                        PublicKey piccPublicKey)
                 throws net.sf.scuba.smartcards.CardServiceException

Perform EAC-CA (Chip Authentication) part of EAC (version 1). For details see TR-03110 ver. 1.11. In short, we authenticate the chip with DH or ECDH key agreement protocol and create new secure messaging keys. The newly established secure messaging wrapper is made available to the caller in the result.

Parameters:

keyId - passport's public key id (stored in DG14), null if none

oid - the object identifier indicating the Chip Authentication protocol

publicKeyOID - the OID indicating the type of public key

piccPublicKey - PICC's public key (stored in DG14)

Returns:

the Chip Authentication result

Throws:

net.sf.scuba.smartcards.CardServiceException - if Chip Authentication failed or some error occurred

sendPublicKey

public static void sendPublicKey(APDULevelEACCACapable service,
                                 SecureMessagingWrapper wrapper,
                                 String oid,
                                 BigInteger keyId,
                                 PublicKey pcdPublicKey)
                          throws net.sf.scuba.smartcards.CardServiceException

Sends the PCD's public key to the PICC.

Parameters:

service - the card service

wrapper - the existing secure messaging wrapper

oid - the Chip Authentication object identifier

keyId - a key identifier or null

pcdPublicKey - the public key to send

Throws:

net.sf.scuba.smartcards.CardServiceException - on error

computeSharedSecret

public static byte[] computeSharedSecret(String agreementAlg,
                                         PublicKey piccPublicKey,
                                         PrivateKey pcdPrivateKey)
                                  throws NoSuchAlgorithmException,
                                         InvalidKeyException

Performs the key agreement step. Generates a secret based on the PICC's public key and the PCD's private key.

Parameters:

agreementAlg - the agreement algorithm

piccPublicKey - the PICC's public key

pcdPrivateKey - the PCD's private key

Returns:

the shared secret

Throws:

NoSuchAlgorithmException - if the agreement algorithm is unsupported

InvalidKeyException - if one of the keys is invalid

restartSecureMessaging

public static SecureMessagingWrapper restartSecureMessaging(String oid,
                                                            byte[] sharedSecret,
                                                            int maxTranceiveLength,
                                                            boolean shouldCheckMAC)
                                                     throws GeneralSecurityException

Restarts secure messaging based on the shared secret.

Parameters:

oid - the Chip Authentication object identifier

sharedSecret - the shared secret

maxTranceiveLength - the maximum APDU tranceive length

shouldCheckMAC - whether to check MAC

Returns:

the secure messaging wrapper

Throws:

GeneralSecurityException - on error

getWrapper

public SecureMessagingWrapper getWrapper()

Returns the secure messaging wrapper currently in use.

Returns:

a secure messaging wrapper

getKeyHash

public static byte[] getKeyHash(String agreementAlg,
                                PublicKey pcdPublicKey)
                         throws NoSuchAlgorithmException

Returns the key hash which will be used as input for Terminal Authentication.

Parameters:

agreementAlg - the agreement algorithm, either "DH" or "ECDH"

pcdPublicKey - the inspection system's public key

Returns:

the key hash

Throws:

NoSuchAlgorithmException - on error