diff options
Diffstat (limited to 'smcc/src/main/java/at/gv/egiz/smcc/DNIeSecuredChannel.java')
| -rw-r--r-- | smcc/src/main/java/at/gv/egiz/smcc/DNIeSecuredChannel.java | 1087 |
1 files changed, 1087 insertions, 0 deletions
diff --git a/smcc/src/main/java/at/gv/egiz/smcc/DNIeSecuredChannel.java b/smcc/src/main/java/at/gv/egiz/smcc/DNIeSecuredChannel.java new file mode 100644 index 00000000..92ef7f11 --- /dev/null +++ b/smcc/src/main/java/at/gv/egiz/smcc/DNIeSecuredChannel.java @@ -0,0 +1,1087 @@ +package at.gv.egiz.smcc;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.math.BigInteger;
+import java.nio.ByteBuffer;
+import java.security.PublicKey;
+import java.security.cert.X509Certificate;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.interfaces.RSAPublicKey;
+import java.util.Arrays;
+
+import javax.crypto.Cipher;
+import javax.smartcardio.CardChannel;
+import javax.smartcardio.CardException;
+import javax.smartcardio.CommandAPDU;
+import javax.smartcardio.ResponseAPDU;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import at.gv.egiz.smcc.util.SMCCHelper;
+
+public class DNIeSecuredChannel extends T0CardChannel {
+
+ // Public key data of Root CA - required to validate card certificates
+ private static final String ROOT_CA_MODULO = "EADEDA455332945039DAA404C8EBC4D3B7F5DC869283CDEA2F101E2AB54FB0D0B03D8F030DAF2458028288F54CE552F8FA57AB2FB103B112427E11131D1D27E10A5B500EAAE5D940301E30EB26C3E9066B257156ED639D70CCC090B863AFBB3BFED8C17BE7673034B9823E977ED657252927F9575B9FFF6691DB64F80B5E92CD";
+ private static final String ROOT_CA_PUBEXP = "010001";
+
+ // Terminal private RSA key for secure channel establishment
+ private final String TERMINAL_MODULO = "DB2CB41E112BACFA2BD7C3D3D7967E84FB9434FC261F9D090A8983947DAF8488D3DF8FBDCC1F92493585E134A1B42DE519F463244D7ED384E26D516CC7A4FF7895B1992140043AACADFC12E856B202346AF8226B1A882137DC3C5A57F0D2815C1FCD4BB46FA9157FDFFD79EC3A10A824CCC1EB3CE0B6B4396AE236590016BA69";
+ private final String TERMINAL_PRIVEXP = "18B44A3D155C61EBF4E3261C8BB157E36F63FE30E9AF28892B59E2ADEB18CC8C8BAD284B9165819CA4DEC94AA06B69BCE81706D1C1B668EB128695E5F7FEDE18A908A3011A646A481D3EA71D8A387D474609BD57A882B182E047DE80E04B4221416BD39DFA1FAC0300641962ADB109E28CAF50061B68C9CABD9B00313C0F46ED";
+
+ private final byte[] C_CV_CA = new byte[] {
+
+ (byte) 0x7F, (byte) 0x21, (byte) 0x81, (byte) 0xCE, (byte) 0x5F,
+ (byte) 0x37, (byte) 0x81, (byte) 0x80, (byte) 0x3C, (byte) 0xBA,
+ (byte) 0xDC, (byte) 0x36, (byte) 0x84, (byte) 0xBE, (byte) 0xF3,
+ (byte) 0x20, (byte) 0x41, (byte) 0xAD, (byte) 0x15, (byte) 0x50,
+ (byte) 0x89, (byte) 0x25, (byte) 0x8D, (byte) 0xFD, (byte) 0x20,
+ (byte) 0xC6, (byte) 0x91, (byte) 0x15, (byte) 0xD7, (byte) 0x2F,
+ (byte) 0x9C, (byte) 0x38, (byte) 0xAA, (byte) 0x99, (byte) 0xAD,
+ (byte) 0x6C, (byte) 0x1A, (byte) 0xED, (byte) 0xFA, (byte) 0xB2,
+ (byte) 0xBF, (byte) 0xAC, (byte) 0x90, (byte) 0x92, (byte) 0xFC,
+ (byte) 0x70, (byte) 0xCC, (byte) 0xC0, (byte) 0x0C, (byte) 0xAF,
+ (byte) 0x48, (byte) 0x2A, (byte) 0x4B, (byte) 0xE3, (byte) 0x1A,
+ (byte) 0xFD, (byte) 0xBD, (byte) 0x3C, (byte) 0xBC, (byte) 0x8C,
+ (byte) 0x83, (byte) 0x82, (byte) 0xCF, (byte) 0x06, (byte) 0xBC,
+ (byte) 0x07, (byte) 0x19, (byte) 0xBA, (byte) 0xAB, (byte) 0xB5,
+ (byte) 0x6B, (byte) 0x6E, (byte) 0xC8, (byte) 0x07, (byte) 0x60,
+ (byte) 0xA4, (byte) 0xA9, (byte) 0x3F, (byte) 0xA2, (byte) 0xD7,
+ (byte) 0xC3, (byte) 0x47, (byte) 0xF3, (byte) 0x44, (byte) 0x27,
+ (byte) 0xF9, (byte) 0xFF, (byte) 0x5C, (byte) 0x8D, (byte) 0xE6,
+ (byte) 0xD6, (byte) 0x5D, (byte) 0xAC, (byte) 0x95, (byte) 0xF2,
+ (byte) 0xF1, (byte) 0x9D, (byte) 0xAC, (byte) 0x00, (byte) 0x53,
+ (byte) 0xDF, (byte) 0x11, (byte) 0xA5, (byte) 0x07, (byte) 0xFB,
+ (byte) 0x62, (byte) 0x5E, (byte) 0xEB, (byte) 0x8D, (byte) 0xA4,
+ (byte) 0xC0, (byte) 0x29, (byte) 0x9E, (byte) 0x4A, (byte) 0x21,
+ (byte) 0x12, (byte) 0xAB, (byte) 0x70, (byte) 0x47, (byte) 0x58,
+ (byte) 0x8B, (byte) 0x8D, (byte) 0x6D, (byte) 0xA7, (byte) 0x59,
+ (byte) 0x22, (byte) 0x14, (byte) 0xF2, (byte) 0xDB, (byte) 0xA1,
+ (byte) 0x40, (byte) 0xC7, (byte) 0xD1, (byte) 0x22, (byte) 0x57,
+ (byte) 0x9B, (byte) 0x5F, (byte) 0x38, (byte) 0x3D, (byte) 0x22,
+ (byte) 0x53, (byte) 0xC8, (byte) 0xB9, (byte) 0xCB, (byte) 0x5B,
+ (byte) 0xC3, (byte) 0x54, (byte) 0x3A, (byte) 0x55, (byte) 0x66,
+ (byte) 0x0B, (byte) 0xDA, (byte) 0x80, (byte) 0x94, (byte) 0x6A,
+ (byte) 0xFB, (byte) 0x05, (byte) 0x25, (byte) 0xE8, (byte) 0xE5,
+ (byte) 0x58, (byte) 0x6B, (byte) 0x4E, (byte) 0x63, (byte) 0xE8,
+ (byte) 0x92, (byte) 0x41, (byte) 0x49, (byte) 0x78, (byte) 0x36,
+ (byte) 0xD8, (byte) 0xD3, (byte) 0xAB, (byte) 0x08, (byte) 0x8C,
+ (byte) 0xD4, (byte) 0x4C, (byte) 0x21, (byte) 0x4D, (byte) 0x6A,
+ (byte) 0xC8, (byte) 0x56, (byte) 0xE2, (byte) 0xA0, (byte) 0x07,
+ (byte) 0xF4, (byte) 0x4F, (byte) 0x83, (byte) 0x74, (byte) 0x33,
+ (byte) 0x37, (byte) 0x37, (byte) 0x1A, (byte) 0xDD, (byte) 0x8E,
+ (byte) 0x03, (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x01,
+ (byte) 0x42, (byte) 0x08, (byte) 0x65, (byte) 0x73, (byte) 0x52,
+ (byte) 0x44, (byte) 0x49, (byte) 0x60, (byte) 0x00, (byte) 0x06 };
+
+ private final byte[] CHR = new byte[] {
+
+ (byte) 0x83, (byte) 0x08, (byte) 0x65, (byte) 0x73, (byte) 0x53,
+ (byte) 0x44, (byte) 0x49, (byte) 0x60, (byte) 0x00, (byte) 0x06 };
+
+ private final byte[] KEY_SELECTOR = new byte[] {
+
+ (byte) 0x83, (byte) 0x0C, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+ (byte) 0x00, (byte) 0x20, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+ (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x01, (byte) 0x84,
+ (byte) 0x02, (byte) 0x02, (byte) 0x1F };
+
+ private final byte[] C_CV_IFD = new byte[] {
+
+ (byte) 0x7f, (byte) 0x21, (byte) 0x81, (byte) 0xcd, (byte) 0x5f,
+ (byte) 0x37, (byte) 0x81, (byte) 0x80, (byte) 0x82, (byte) 0x5b,
+ (byte) 0x69, (byte) 0xc6, (byte) 0x45, (byte) 0x1e, (byte) 0x5f,
+ (byte) 0x51, (byte) 0x70, (byte) 0x74, (byte) 0x38, (byte) 0x5f,
+ (byte) 0x2f, (byte) 0x17, (byte) 0xd6, (byte) 0x4d, (byte) 0xfe,
+ (byte) 0x2e, (byte) 0x68, (byte) 0x56, (byte) 0x75, (byte) 0x67,
+ (byte) 0x09, (byte) 0x4b, (byte) 0x57, (byte) 0xf3, (byte) 0xc5,
+ (byte) 0x78, (byte) 0xe8, (byte) 0x30, (byte) 0xe4, (byte) 0x25,
+ (byte) 0x57, (byte) 0x2d, (byte) 0xe8, (byte) 0x28, (byte) 0xfa,
+ (byte) 0xf4, (byte) 0xde, (byte) 0x1b, (byte) 0x01, (byte) 0xc3,
+ (byte) 0x94, (byte) 0xe3, (byte) 0x45, (byte) 0xc2, (byte) 0xfb,
+ (byte) 0x06, (byte) 0x29, (byte) 0xa3, (byte) 0x93, (byte) 0x49,
+ (byte) 0x2f, (byte) 0x94, (byte) 0xf5, (byte) 0x70, (byte) 0xb0,
+ (byte) 0x0b, (byte) 0x1d, (byte) 0x67, (byte) 0x77, (byte) 0x29,
+ (byte) 0xf7, (byte) 0x55, (byte) 0xd1, (byte) 0x07, (byte) 0x02,
+ (byte) 0x2b, (byte) 0xb0, (byte) 0xa1, (byte) 0x16, (byte) 0xe1,
+ (byte) 0xd7, (byte) 0xd7, (byte) 0x65, (byte) 0x9d, (byte) 0xb5,
+ (byte) 0xc4, (byte) 0xac, (byte) 0x0d, (byte) 0xde, (byte) 0xab,
+ (byte) 0x07, (byte) 0xff, (byte) 0x04, (byte) 0x5f, (byte) 0x37,
+ (byte) 0xb5, (byte) 0xda, (byte) 0xf1, (byte) 0x73, (byte) 0x2b,
+ (byte) 0x54, (byte) 0xea, (byte) 0xb2, (byte) 0x38, (byte) 0xa2,
+ (byte) 0xce, (byte) 0x17, (byte) 0xc9, (byte) 0x79, (byte) 0x41,
+ (byte) 0x87, (byte) 0x75, (byte) 0x9c, (byte) 0xea, (byte) 0x9f,
+ (byte) 0x92, (byte) 0xa1, (byte) 0x78, (byte) 0x05, (byte) 0xa2,
+ (byte) 0x7c, (byte) 0x10, (byte) 0x15, (byte) 0xec, (byte) 0x56,
+ (byte) 0xcc, (byte) 0x7e, (byte) 0x47, (byte) 0x1a, (byte) 0x48,
+ (byte) 0x8e, (byte) 0x6f, (byte) 0x1b, (byte) 0x91, (byte) 0xf7,
+ (byte) 0xaa, (byte) 0x5f, (byte) 0x38, (byte) 0x3c, (byte) 0xad,
+ (byte) 0xfc, (byte) 0x12, (byte) 0xe8, (byte) 0x56, (byte) 0xb2,
+ (byte) 0x02, (byte) 0x34, (byte) 0x6a, (byte) 0xf8, (byte) 0x22,
+ (byte) 0x6b, (byte) 0x1a, (byte) 0x88, (byte) 0x21, (byte) 0x37,
+ (byte) 0xdc, (byte) 0x3c, (byte) 0x5a, (byte) 0x57, (byte) 0xf0,
+ (byte) 0xd2, (byte) 0x81, (byte) 0x5c, (byte) 0x1f, (byte) 0xcd,
+ (byte) 0x4b, (byte) 0xb4, (byte) 0x6f, (byte) 0xa9, (byte) 0x15,
+ (byte) 0x7f, (byte) 0xdf, (byte) 0xfd, (byte) 0x79, (byte) 0xec,
+ (byte) 0x3a, (byte) 0x10, (byte) 0xa8, (byte) 0x24, (byte) 0xcc,
+ (byte) 0xc1, (byte) 0xeb, (byte) 0x3c, (byte) 0xe0, (byte) 0xb6,
+ (byte) 0xb4, (byte) 0x39, (byte) 0x6a, (byte) 0xe2, (byte) 0x36,
+ (byte) 0x59, (byte) 0x00, (byte) 0x16, (byte) 0xba, (byte) 0x69,
+ (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x01, (byte) 0x42,
+ (byte) 0x08, (byte) 0x65, (byte) 0x73, (byte) 0x53, (byte) 0x44,
+ (byte) 0x49, (byte) 0x60, (byte) 0x00, (byte) 0x06
+
+ };
+
+ // PDU to retrieve card info
+ private final byte[] APDU_GET_CHIP_INFO = new byte[] { (byte) 0x90,
+ (byte) 0xB8, (byte) 0x00, (byte) 0x00, (byte) 0x07 };
+
+ // Path to card's component certificate
+ private final byte[] SECURE_CHANNEL_COMP_CERT_ID = new byte[] {
+ (byte) 0x60, (byte) 0x1F };
+
+ // Path to card's intermediate certificate
+ private final byte[] SECURE_CHANNEL_INTERMEDIAT_CERT_ID = new byte[] {
+ (byte) 0x60, (byte) 0x20 };
+
+ private final byte[] TERMINAL_CHALLENGE_TAIL = new byte[] {
+
+ (byte) 0x20, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+ (byte) 0x00, (byte) 0x00, (byte) 0x01 };
+
+ private final byte[] KENC_COMPUTATION_TAIL = new byte[] {
+
+ (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x01 };
+
+ private final byte[] KMAC_COMPUTATION_TAIL = new byte[] {
+
+ (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x02 };
+
+ private final int BLOCK_LENGTH = 8;
+
+ private final Logger log = LoggerFactory
+ .getLogger(DNIeSecuredChannel.class);
+
+ private byte[] snIcc;
+ private byte[] componentCert;
+ private byte[] intermediateCert;
+
+ private byte[] rndIfd;
+ private byte[] rndIcc;
+ private int prndLength;
+
+ private byte[] kicc;
+ private byte[] kifd;
+
+ private byte[] kEnc;
+ private byte[] kMac;
+ private byte[] ssc;
+
+ private boolean established;
+
+ public DNIeSecuredChannel(CardChannel channel) {
+
+ super(channel);
+ this.established = false;
+
+ try {
+ this.establish();
+ } catch (CardException e) {
+
+ log.error("Error establishing secure channel with card.", e);
+ }
+ }
+
+ public void establish() throws CardException {
+
+ log.trace("Try to set up secure channel to card..");
+
+ // get chip info
+ this.snIcc = executeGetChipInfo();
+
+ // get card certificates to establish secure channel
+ this.intermediateCert = executeReadCardCertificate(SECURE_CHANNEL_INTERMEDIAT_CERT_ID);
+ this.componentCert = executeReadCardCertificate(SECURE_CHANNEL_COMP_CERT_ID);
+
+ // verify card's secure channel certificates
+ verifyCertificates();
+
+ // load terminal secure channel certificates and select appropriate keys
+ loadTerminalCertsAndSelectKeys();
+
+ // perform internal authentication
+ performInternalAuthentication();
+
+ // perform external authentication
+ performExternalAuthentication();
+
+ // derive channel keys
+ calculateChannelKeys();
+
+ // secure channel successfully established
+ this.established = true;
+ log.trace("Secure channel successfully established.");
+
+ }
+
+ @Override
+ public int transmit(ByteBuffer command, ByteBuffer response)
+ throws CardException {
+
+ byte[] commandAPDU = new byte[command.remaining()];
+ for(int i=0; i<commandAPDU.length; i++) {
+
+ commandAPDU[i] = command.get();
+ }
+
+ CommandAPDU apdu = new CommandAPDU(commandAPDU);
+ ResponseAPDU resp = transmit(apdu);
+
+ byte[] responseData = resp.getBytes();
+ for(int i=0; i<responseData.length; i++) {
+
+ response.put(responseData[i]);
+ }
+
+ return responseData.length;
+ }
+
+ @Override
+ public ResponseAPDU transmit(CommandAPDU apdu) throws CardException {
+
+ if(!this.established) {
+
+ this.establish();
+ }
+
+ byte[] plainAPDUData = apdu.getBytes();
+ byte[] securedAPDUData = secureAPDU(plainAPDUData);
+
+ CommandAPDU securedAPDU = new CommandAPDU(securedAPDUData);
+ ResponseAPDU securedResp = super.transmit(securedAPDU);
+
+ byte[] respData = verifyAndDecryptSecuredResponseAPDU(securedResp.getData());
+ ResponseAPDU resp = new ResponseAPDU(respData);
+
+ return resp;
+ }
+
+ private byte[] executeGetChipInfo() throws CardException {
+
+ // get chip info - read out card serial number
+ CommandAPDU command = new CommandAPDU(APDU_GET_CHIP_INFO);
+ ResponseAPDU resp = super.transmit(command);
+
+ if (resp.getSW() != 0x9000) {
+
+ log.error("Error getting chip info: "
+ + Integer.toHexString(resp.getSW()));
+ throw new CardException("Error getting chip info: "
+ + Integer.toHexString(resp.getSW()));
+ }
+
+ return resp.getData();
+ }
+
+ private byte[] executeReadCardCertificate(byte[] certId)
+ throws CardException {
+
+ byte[] fci = executeSelect(certId);
+
+ byte certLenHigh;
+ byte certLenLow;
+
+ if (fci != null && fci.length >= 7) {
+
+ certLenHigh = fci[7];
+ certLenLow = fci[8];
+ } else {
+ log.error("Error reading card certificate: Invalid FCI");
+ throw new CardException("Invalid FCI obtained from card.");
+ }
+
+ ByteArrayOutputStream bof = new ByteArrayOutputStream();
+
+ int bytes2read = (certLenHigh * 256) + certLenLow;
+ int bytesRead = 0;
+
+ boolean done = false;
+ int offset = 0;
+ int len = 0;
+
+ while (!done) {
+
+ if (bytes2read - bytesRead > 255) {
+ len = 255;
+ } else {
+ len = bytes2read - bytesRead;
+ }
+
+ byte[] offsetBytes = SMCCHelper.toByteArray(offset);
+
+ byte[] apdu = new byte[5];
+ apdu[0] = (byte) 0x00;
+ apdu[1] = (byte) 0xB0;
+ apdu[2] = offsetBytes[0];
+ apdu[3] = offsetBytes[1];
+ apdu[4] = (byte) len;
+
+ CommandAPDU command = new CommandAPDU(apdu);
+ ResponseAPDU resp = super.transmit(command);
+
+ byte[] certData = resp.getData();
+
+ try {
+ bof.write(certData);
+ } catch (IOException e) {
+ log.error("Error reading card certificate.", e);
+ throw new CardException("Error reading certificate from card",
+ e);
+ }
+
+ bytesRead = bytesRead + certData.length;
+ offset = bytesRead;
+
+ if (bytesRead == bytes2read) {
+
+ done = true;
+ }
+ }
+
+ return bof.toByteArray();
+ }
+
+ private byte[] executeSelect(byte[] id) throws CardException {
+
+ byte[] apduHeader = new byte[] { (byte) 0x00, (byte) 0xA4, (byte) 0x00,
+ (byte) 0x00 };
+
+ byte[] apdu = new byte[apduHeader.length + 1 + id.length];
+ System.arraycopy(apduHeader, 0, apdu, 0, apduHeader.length);
+ apdu[apduHeader.length] = (byte) id.length;
+ System.arraycopy(id, 0, apdu, apduHeader.length + 1, id.length);
+
+ CommandAPDU command = new CommandAPDU(apdu);
+ ResponseAPDU resp = super.transmit(command);
+
+ if (resp.getSW() != 0x9000) {
+
+ log.error("Error selecting DF or EF: " + Integer.toHexString(resp.getSW()));
+ throw new CardException("Unexpected response to Select Command: "
+ + Integer.toHexString(resp.getSW()));
+ }
+
+ return resp.getData();
+
+ }
+
+ private void verifyCertificates() throws CardException {
+
+ // This method verifies the card's component and intermediate
+ // certificates cryptographically only.
+
+ RSAPublicKey rootPubKey = DNIeCryptoUtil.createRSAPublicKey(
+ ROOT_CA_MODULO, ROOT_CA_PUBEXP);
+
+ X509Certificate intermediate = DNIeCryptoUtil
+ .createCertificate(intermediateCert);
+ X509Certificate component = DNIeCryptoUtil
+ .createCertificate(componentCert);
+
+ try {
+ component.verify(intermediate.getPublicKey());
+ intermediate.verify(rootPubKey);
+ } catch (Exception e) {
+
+ log.error("Error verifying SM card certificate.", e);
+ throw new CardException("Certificate verification failed.", e);
+ }
+ }
+
+ private void loadTerminalCertsAndSelectKeys() throws CardException {
+
+ // MSE
+ executeManageSecurityEnvironment((byte) 0x81, (byte) 0xB6, new byte[] {
+ (byte) 0x83, (byte) 0x02, (byte) 0x02, (byte) 0x0F });
+
+ // PSO - load intermediate certificate
+ executePerformSecurityOperation(C_CV_CA);
+
+ // MSE
+ executeManageSecurityEnvironment((byte) 0x81, (byte) 0xB6, CHR);
+
+ // PSO - load terminal certificate
+ executePerformSecurityOperation(C_CV_IFD);
+
+ // MSE - select keys
+ executeManageSecurityEnvironment((byte) 0xC1, (byte) 0xA4, KEY_SELECTOR);
+
+ }
+
+ private void executeManageSecurityEnvironment(byte p1, byte p2, byte[] data)
+ throws CardException {
+
+ // MSE
+ CommandAPDU command = new CommandAPDU((byte) 0x00, (byte) 0x22, p1, p2,
+ data);
+ ResponseAPDU resp = super.transmit(command);
+
+ if (resp.getSW() != 0x9000) {
+
+ log.error("Error executing Manage Security Environment: " + Integer.toHexString(resp.getSW()));
+ throw new CardException(
+ "Unexpected response from card during preparation of secure channel credentials: "
+ + Integer.toHexString(resp.getSW()));
+ }
+ }
+
+ private void executePerformSecurityOperation(byte[] data)
+ throws CardException {
+
+ // PSO - load intermediate certificate
+ CommandAPDU command = new CommandAPDU((byte) 0x00, (byte) 0x2A,
+ (byte) 0x00, (byte) 0xAE, data);
+ ResponseAPDU resp = super.transmit(command);
+
+ if (resp.getSW() != 0x9000) {
+
+ log.error("Error executing Perform Security Operation: " + Integer.toHexString(resp.getSW()));
+ throw new CardException(
+ "Unexpected response from card during preparation of secure channel credentials: "
+ + Integer.toHexString(resp.getSW()));
+ }
+ }
+
+ private void performInternalAuthentication() throws CardException {
+
+ log.trace("Starting internal authentication..");
+
+ byte[] randomBytes = DNIeCryptoUtil.getRandomBytes(BLOCK_LENGTH);
+ byte[] challengeData = new byte[randomBytes.length
+ + TERMINAL_CHALLENGE_TAIL.length];
+
+ this.rndIfd = randomBytes;
+
+ System.arraycopy(randomBytes, 0, challengeData, 0, randomBytes.length);
+ System.arraycopy(TERMINAL_CHALLENGE_TAIL, 0, challengeData,
+ randomBytes.length, TERMINAL_CHALLENGE_TAIL.length);
+
+ byte[] responseData = executeSendTerminalChallenge(challengeData);
+
+ // verify response
+ boolean ok = verifyCardResponse(responseData);
+
+ log.trace("Internal Authentiction succeeded: " + ok);
+
+ if (!ok) {
+
+ log.error("Internal authentication failed - unable to sucessfully verify card response.");
+ throw new CardException("Internal authentication failed");
+ }
+
+ }
+
+ private byte[] executeSendTerminalChallenge(byte[] challenge)
+ throws CardException {
+
+ // send challenge to card
+ CommandAPDU command = new CommandAPDU((byte) 0x00, (byte) 0x88,
+ (byte) 0x00, (byte) 0x00, challenge);
+ ResponseAPDU resp = super.transmit(command);
+
+ byte[] data = null;
+
+ if (resp.getSW() == 0x9000) {
+
+ data = resp.getData();
+
+ } else {
+
+ log.error("Error sending terminal challenge to card: " + Integer.toHexString(resp.getSW()));
+ throw new CardException("Invalid response to terminal challenge: "
+ + Integer.toHexString(resp.getSW()));
+ }
+
+ return data;
+ }
+
+ private boolean verifyCardResponse(byte[] resp) throws CardException {
+
+ byte[] challenge = this.rndIfd;
+ byte[] response = resp;
+
+ // decrypt response with terminal private key
+ byte[] plain = null;
+ RSAPrivateKey terminalPrivateKey = DNIeCryptoUtil.createRSAPrivateKey(
+ TERMINAL_MODULO, TERMINAL_PRIVEXP);
+ try {
+ plain = DNIeCryptoUtil.rsaDecrypt(terminalPrivateKey, response);
+ } catch (Exception e) {
+ log.error("Error verifying card response.");
+ throw new CardException("Error decrypting card response.", e);
+ }
+
+ X509Certificate cert = DNIeCryptoUtil.createCertificate(componentCert);
+ PublicKey pubKey = cert.getPublicKey();
+
+ byte[] sig = null;
+
+ try {
+ sig = DNIeCryptoUtil.rsaDecrypt(pubKey, plain);
+
+ } catch (Exception e) {
+
+ log.error("Error verifying card response.", e);
+ throw new CardException(
+ "Error decrypting card response with card's public key", e);
+ }
+
+ if (sig == null) {
+
+ log.error("Error verifying card response - decryption result is null");
+ throw new CardException("Invalid decryption result: null.");
+ } else {
+
+ if (sig[0] == (byte) 0x6A && sig[sig.length - 1] == (byte) 0xBC) {
+
+ // Obtained response from card was obviously SIG - nothing else
+ // to do here so far
+
+ } else {
+
+ // Obtained response from card was probably N.ICC-SIG -
+ // compute N.ICC-SIG and decrypt result again
+
+ RSAPublicKey rsaPubKey = (RSAPublicKey) pubKey;
+ BigInteger mod = rsaPubKey.getModulus();
+ BigInteger sigVal = SMCCHelper.createUnsignedBigInteger(plain);
+
+ BigInteger substractionResult = mod.subtract(sigVal);
+ byte[] encrypted = substractionResult.toByteArray();
+
+ // necessary if substraction result contains leading
+ // zero byte
+ byte[] trimmed = new byte[128];
+ System.arraycopy(encrypted, encrypted.length - 128, trimmed, 0,
+ 128);
+
+ try {
+ sig = DNIeCryptoUtil.rsaDecrypt(pubKey, trimmed);
+
+ } catch (Exception e) {
+
+ log.error("Error verifying card response.", e);
+ throw new CardException("Error decrypting card response.",
+ e);
+ }
+ }
+ }
+
+ // extract data from decrypted response
+ byte[] hash = new byte[20];
+ byte[] kIcc = new byte[32];
+ byte[] prnd1 = new byte[sig.length - 2 - 20 - 32];
+
+ this.prndLength = prnd1.length;
+
+ System.arraycopy(sig, 1, prnd1, 0, prnd1.length); // 1 byte offset due
+ // to 6A padding
+ System.arraycopy(sig, prnd1.length + 1, kIcc, 0, kIcc.length);
+ System.arraycopy(sig, prnd1.length + kIcc.length + 1, hash, 0,
+ hash.length);
+
+ // verify hash
+ byte[] hashData = new byte[prnd1.length + kIcc.length
+ + challenge.length + TERMINAL_CHALLENGE_TAIL.length];
+
+ System.arraycopy(prnd1, 0, hashData, 0, prnd1.length);
+ System.arraycopy(kIcc, 0, hashData, prnd1.length, kIcc.length);
+ System.arraycopy(challenge, 0, hashData, prnd1.length + kIcc.length,
+ challenge.length);
+ System.arraycopy(TERMINAL_CHALLENGE_TAIL, 0, hashData, prnd1.length
+ + kIcc.length + challenge.length,
+ TERMINAL_CHALLENGE_TAIL.length);
+
+ byte[] digest = DNIeCryptoUtil.computeSHA1Hash(hashData);
+
+ boolean internalAuthResult = Arrays.equals(hash, digest);
+
+ if (internalAuthResult) {
+
+ // if verification succeeded, remember kicc for subsequent channel
+ // key derivation
+ this.kicc = kIcc;
+ }
+
+ return internalAuthResult;
+ }
+
+ private void performExternalAuthentication() throws CardException {
+
+ log.trace("Performing external authentication.");
+
+ byte[] cardChallenge = executeRequestCardChallenge();
+
+ this.rndIcc = cardChallenge;
+
+ byte[] prnd2 = DNIeCryptoUtil.getRandomBytes(this.prndLength);
+ byte[] kIfd = DNIeCryptoUtil.getRandomBytes(32);
+
+ // compute hash
+ byte[] hashData = new byte[prnd2.length + kIfd.length
+ + cardChallenge.length + BLOCK_LENGTH];
+
+ System.arraycopy(prnd2, 0, hashData, 0, prnd2.length);
+ System.arraycopy(kIfd, 0, hashData, prnd2.length, kIfd.length);
+ System.arraycopy(cardChallenge, 0, hashData,
+ prnd2.length + kIfd.length, cardChallenge.length);
+
+ int snPadding = BLOCK_LENGTH - snIcc.length;
+
+ for (int i = 0; i < snPadding; i++) {
+
+ hashData[prnd2.length + kIfd.length + cardChallenge.length + i] = (byte) 0x00;
+ }
+
+ System.arraycopy(snIcc, 0, hashData, prnd2.length + kIfd.length
+ + cardChallenge.length + snPadding, snIcc.length);
+
+ byte[] digest = DNIeCryptoUtil.computeSHA1Hash(hashData);
+
+ // prepare data to be encrypted
+ byte[] plain = new byte[2 + prnd2.length + kIfd.length + digest.length];
+
+ plain[0] = (byte) 0x6A;
+
+ System.arraycopy(prnd2, 0, plain, 1, prnd2.length);
+ System.arraycopy(kIfd, 0, plain, 1 + prnd2.length, kIfd.length);
+ System.arraycopy(digest, 0, plain, 1 + prnd2.length + kIfd.length,
+ digest.length);
+
+ plain[plain.length - 1] = (byte) 0xBC;
+
+ // encrypt plain data
+ RSAPrivateKey terminalPrivateKey = DNIeCryptoUtil.createRSAPrivateKey(
+ TERMINAL_MODULO, TERMINAL_PRIVEXP);
+
+ byte[] encResult = null;
+ try {
+ encResult = DNIeCryptoUtil.rsaEncrypt(terminalPrivateKey, plain);
+ } catch (Exception e) {
+ log.error("Error performing external authentication.", e);
+ throw new CardException("Error encrypting authentication data.", e);
+ }
+
+ // apply MIN function
+ BigInteger sig = SMCCHelper.createUnsignedBigInteger(encResult);
+ BigInteger mod = new BigInteger(TERMINAL_MODULO, 16);
+
+ BigInteger diff = mod.subtract(sig);
+ BigInteger sigMin = diff.min(sig);
+
+ // encrypt with card public key
+ PublicKey cardPubKey = null;
+
+ X509Certificate cert = DNIeCryptoUtil.createCertificate(componentCert);
+ cardPubKey = cert.getPublicKey();
+
+ byte[] authData = null;
+ try {
+ authData = DNIeCryptoUtil.rsaEncrypt(cardPubKey, sigMin
+ .toByteArray());
+ } catch (Exception e) {
+ log.error("Error performing external authentication.", e);
+ throw new CardException("Error encrypting authentication data.", e);
+ }
+
+ // send auth data to card
+ // BE CAREFUL WITH THAT! EXT-AUTH METHOD MAY GET BLOCKED!
+ if (executeExternalAuthenticate(authData)) {
+
+ log.trace("External authentication succeeded.");
+ this.kifd = kIfd;
+ } else {
+ log.error("Error performing external authentication.");
+ throw new CardException("External Authentication failed.");
+ }
+
+ }
+
+ private byte[] executeRequestCardChallenge() throws CardException {
+
+ CommandAPDU command = new CommandAPDU((byte) 0x00, (byte) 0x84,
+ (byte) 0x00, (byte) 0x00, (byte) BLOCK_LENGTH);
+ ResponseAPDU resp = super.transmit(command);
+
+ if (resp.getSW() != 0x9000) {
+
+ log.error("Error requesting challenge from card: " + Integer.toHexString(resp.getSW()));
+ throw new CardException(
+ "Invalid response from card upon challenge request: "
+ + Integer.toHexString(resp.getSW()));
+ }
+
+ return resp.getData();
+ }
+
+ private boolean executeExternalAuthenticate(byte[] authData)
+ throws CardException {
+
+ CommandAPDU command = new CommandAPDU((byte) 0x00, (byte) 0x82,
+ (byte) 0x00, (byte) 0x00, authData);
+ ResponseAPDU resp = super.transmit(command);
+
+ return resp.getSW() == 0x9000;
+ }
+
+ private void calculateChannelKeys() throws CardException {
+
+ if (this.kicc == null || this.kifd == null) {
+
+ log.error("Error generating channel keys - required key data is null.");
+ throw new CardException(
+ "Required data for deriving keys not available.");
+ }
+
+ if (this.kicc.length != this.kifd.length) {
+
+ log.error("Error generating channel keys - invalid key data");
+ throw new CardException(
+ "Required data for deriving keys is invalid.");
+ }
+
+ byte[] kifdicc = new byte[this.kicc.length];
+
+ for (int i = 0; i < kifdicc.length; i++) {
+
+ kifdicc[i] = (byte) (this.kicc[i] ^ this.kifd[i]);
+ }
+
+ byte[] kEncHashData = new byte[kifdicc.length
+ + KENC_COMPUTATION_TAIL.length];
+ byte[] kMacHashData = new byte[kifdicc.length
+ + KMAC_COMPUTATION_TAIL.length];
+
+ System.arraycopy(kifdicc, 0, kEncHashData, 0, kifdicc.length);
+ System.arraycopy(kifdicc, 0, kMacHashData, 0, kifdicc.length);
+
+ System.arraycopy(KENC_COMPUTATION_TAIL, 0, kEncHashData,
+ kifdicc.length, KENC_COMPUTATION_TAIL.length);
+ System.arraycopy(KMAC_COMPUTATION_TAIL, 0, kMacHashData,
+ kifdicc.length, KMAC_COMPUTATION_TAIL.length);
+
+ byte[] hashEnc = DNIeCryptoUtil.computeSHA1Hash(kEncHashData);
+ byte[] hashMac = DNIeCryptoUtil.computeSHA1Hash(kMacHashData);
+
+ this.kEnc = Arrays.copyOfRange(hashEnc, 0, 16);
+ this.kMac = Arrays.copyOfRange(hashMac, 0, 16);
+
+ // compute sequence counter SSC
+ if (this.rndIcc == null || this.rndIfd == null
+ || this.rndIcc.length < 4 || this.rndIfd.length < 4) {
+
+ log.error("Error generating channel keys - invlaid ssc data");
+ throw new CardException("Data required to compute SSC not valid.");
+ }
+
+ this.ssc = new byte[BLOCK_LENGTH];
+
+ System.arraycopy(this.rndIcc, this.rndIcc.length - 4, this.ssc, 0, 4);
+ System.arraycopy(this.rndIfd, this.rndIfd.length - 4, this.ssc, 4, 4);
+ }
+
+
+ private byte[] secureAPDUWithoutData(byte[] apdu) throws CardException {
+
+ if(apdu.length < 4 || apdu.length > 5) {
+
+ log.error("Error securing APDU - invalid APDU length: " + apdu.length);
+ throw new CardException("Invalid APDU length.");
+ }
+
+ boolean leAvailable = apdu.length == 5;
+
+ byte encCLA = (byte) (apdu[0] | (byte) 0x0C);
+ byte[] encHeader = new byte[] { encCLA, apdu[1], apdu[2],
+ apdu[3] };
+ byte[] paddedHeader = DNIeCryptoUtil.applyPadding(BLOCK_LENGTH,
+ encHeader);
+
+ int leFieldLen;
+ byte[] leField = null;
+ if(leAvailable) {
+ leField = new byte[3];
+ leField[0] = (byte) 0x97;
+ leField[1] = (byte) 0x01;
+ leField[2] = apdu[4];
+ leFieldLen = leField.length;
+ } else {
+
+ leFieldLen = 0;
+ }
+
+ byte[] macData = new byte[paddedHeader.length + leFieldLen];
+ System.arraycopy(paddedHeader, 0, macData, 0,
+ paddedHeader.length);
+
+ if(leAvailable) {
+ System.arraycopy(leField, 0, macData, paddedHeader.length,
+ leField.length);
+
+ macData = DNIeCryptoUtil.applyPadding(
+ BLOCK_LENGTH, macData);
+ }
+
+ incrementSSC();
+
+ byte[] mac = DNIeCryptoUtil.calculateAPDUMAC(macData,
+ kMac, this.ssc, BLOCK_LENGTH);
+
+ byte[] encapsulatedMac = new byte[mac.length + 2];
+ encapsulatedMac[0] = (byte) 0x8E;
+ encapsulatedMac[1] = (byte) mac.length;
+ System.arraycopy(mac, 0, encapsulatedMac, 2, mac.length);
+
+ byte[] completeMessage = new byte[5 + leFieldLen
+ + encapsulatedMac.length];
+ completeMessage[0] = encCLA;
+ completeMessage[1] = apdu[1];
+ completeMessage[2] = apdu[2];
+ completeMessage[3] = apdu[3];
+ completeMessage[4] = (byte) (encapsulatedMac.length + leFieldLen);
+
+ if(leAvailable) {
+ System
+ .arraycopy(leField, 0, completeMessage, 5,
+ leField.length);
+ }
+
+ System.arraycopy(encapsulatedMac, 0, completeMessage,
+ 5 + leFieldLen, encapsulatedMac.length);
+
+ return completeMessage;
+
+ }
+
+ private byte[] secureAPDUWithData(byte[] apdu) throws CardException {
+
+ if(apdu.length < 6) {
+
+ log.error("Error securing APDU - invalid APDU length: " + apdu.length);
+ throw new CardException("Error securing APDU - invalid APDU length: " + apdu.length);
+ }
+
+ byte cla = apdu[0];
+ byte ins = apdu[1];
+ byte p1 = apdu[2];
+ byte p2 = apdu[3];
+ byte lc = apdu[4];
+
+ boolean leAvailable;
+ if(apdu.length == lc + 5 + 1) {
+
+ leAvailable = true;
+ } else if(apdu.length != lc + 5) {
+
+ log.error("Error securing APDU - invalid APDU length: " + apdu.length);
+ throw new CardException("Invalid APDU length or format.");
+ } else {
+
+ leAvailable = false;
+ }
+
+ byte[] leField = null;
+ if(leAvailable) {
+
+ byte le = apdu[apdu.length-1];
+
+ leField = new byte[3];
+ leField[0] = (byte) 0x97;
+ leField[1] = (byte) 0x01;
+ leField[2] = le;
+ }
+
+ byte[] data = new byte[lc];
+ System.arraycopy(apdu, 5, data, 0, lc);
+
+ byte[] paddedData = DNIeCryptoUtil.applyPadding(BLOCK_LENGTH, data);
+
+ byte[] encrypted = null;
+
+ try {
+
+ encrypted = DNIeCryptoUtil.perform3DESCipherOperation(paddedData,
+ kEnc, Cipher.ENCRYPT_MODE);
+
+ } catch (Exception e) {
+
+ log.error("Error encrypting APDU.", e);
+ throw new CardException("Error encrypting APDU.", e);
+ }
+
+ byte[] encapsulated = new byte[encrypted.length + 3];
+ encapsulated[0] = (byte) 0x87;
+ encapsulated[1] = (byte) (encrypted.length + 1);
+ encapsulated[2] = (byte) 0x01;
+ System.arraycopy(encrypted, 0, encapsulated, 3, encrypted.length);
+
+ // calculate MAC
+ byte encCLA = (byte) (cla | (byte) 0x0C);
+ byte[] encHeader = new byte[] { encCLA, ins, p1, p2 };
+ byte[] paddedHeader = DNIeCryptoUtil.applyPadding(BLOCK_LENGTH,
+ encHeader);
+
+ byte[] headerAndData = new byte[paddedHeader.length
+ + encapsulated.length];
+ System
+ .arraycopy(paddedHeader, 0, headerAndData, 0,
+ paddedHeader.length);
+ System.arraycopy(encapsulated, 0, headerAndData, paddedHeader.length,
+ encapsulated.length);
+
+ if(leAvailable) {
+ byte[] macData = new byte[headerAndData.length + leField.length];
+ System.arraycopy(headerAndData, 0, macData, 0, headerAndData.length);
+ System.arraycopy(leField, 0, macData, headerAndData.length, leField.length);
+
+ headerAndData = macData;
+ }
+
+ byte[] paddedHeaderAndData = DNIeCryptoUtil.applyPadding(BLOCK_LENGTH,
+ headerAndData);
+
+ incrementSSC();
+
+ byte[] mac = DNIeCryptoUtil.calculateAPDUMAC(paddedHeaderAndData, kMac,
+ this.ssc, BLOCK_LENGTH);
+
+ byte[] encapsulatedMac = new byte[mac.length + 2];
+ encapsulatedMac[0] = (byte) 0x8E;
+ encapsulatedMac[1] = (byte) mac.length;
+ System.arraycopy(mac, 0, encapsulatedMac, 2, mac.length);
+
+ int leFieldLen;
+ if(leAvailable) {
+ leFieldLen = leField.length;
+ } else {
+ leFieldLen = 0;
+ }
+
+ byte[] completeMessage = new byte[5 + encapsulated.length
+ + encapsulatedMac.length + leFieldLen];
+ completeMessage[0] = encCLA;
+ completeMessage[1] = ins;
+ completeMessage[2] = p1;
+ completeMessage[3] = p2;
+
+ completeMessage[4] = (byte) (encapsulated.length + leFieldLen + encapsulatedMac.length);
+ System.arraycopy(encapsulated, 0, completeMessage, 5,
+ encapsulated.length);
+
+ if(leAvailable) {
+ System.arraycopy(leField, 0, completeMessage, 5 + encapsulated.length, leFieldLen);
+ }
+
+ System.arraycopy(encapsulatedMac, 0, completeMessage,
+ 5 + encapsulated.length + leFieldLen, encapsulatedMac.length);
+
+ return completeMessage;
+
+ }
+
+ private byte[] secureAPDU(byte[] apdu) throws CardException {
+
+ if (apdu == null || apdu.length < 4) {
+
+ log.error("Invalid APDU to secure.");
+ throw new CardException("Invalid APDU to secure.");
+ }
+
+ if (apdu.length == 4 || apdu.length == 5) {
+
+ return secureAPDUWithoutData(apdu);
+ }
+
+ if(apdu.length > 5) {
+
+ return secureAPDUWithData(apdu);
+ }
+
+ throw new CardException("Error securing APDU - unexpected APDU length.");
+ }
+
+ private byte[] verifyAndDecryptSecuredResponseAPDU(byte[] securedAPDU)
+ throws CardException {
+
+ byte[] data = new byte[securedAPDU.length - 10];
+ byte[] commandResponse = new byte[4];
+ byte[] obtainedMac = new byte[4];
+
+ System.arraycopy(securedAPDU, 0, data, 0, data.length);
+ System.arraycopy(securedAPDU, data.length, commandResponse, 0,
+ commandResponse.length);
+ System.arraycopy(securedAPDU, data.length + commandResponse.length + 2,
+ obtainedMac, 0, obtainedMac.length);
+
+ byte[] macData = new byte[data.length + commandResponse.length];
+ System.arraycopy(data, 0, macData, 0, data.length);
+ System.arraycopy(commandResponse, 0, macData, data.length,
+ commandResponse.length);
+
+ byte[] paddedMacData = DNIeCryptoUtil.applyPadding(BLOCK_LENGTH, macData);
+
+ incrementSSC();
+
+ byte[] mac = DNIeCryptoUtil.calculateAPDUMAC(paddedMacData, this.kMac, this.ssc, BLOCK_LENGTH);
+
+ if (!Arrays.equals(mac, obtainedMac)) {
+
+ log.error("Error verifiying MAC of secured response. MAC values do not match.");
+ throw new CardException("Unable to verify MAC of Response APDU.");
+ }
+
+ if (data.length > 0) {
+
+ byte[] data2decrypt = new byte[data.length
+ - DNIeCryptoUtil.getCutOffLength(data, BLOCK_LENGTH)];
+ System.arraycopy(data, DNIeCryptoUtil.getCutOffLength(data, BLOCK_LENGTH),
+ data2decrypt, 0, data2decrypt.length);
+
+ byte[] plainData = null;
+
+ try {
+ plainData = DNIeCryptoUtil.perform3DESCipherOperation(data2decrypt, this.kEnc,
+ Cipher.DECRYPT_MODE);
+ } catch (Exception e) {
+ log.error("Error decrypting data.", e);
+ throw new CardException("Unable to decrypt data.", e);
+ }
+
+ byte[] unpaddedData = DNIeCryptoUtil.removePadding(plainData);
+
+ byte[] result = new byte[unpaddedData.length + 2];
+ System.arraycopy(unpaddedData, 0, result, 0, unpaddedData.length);
+ result[result.length - 2] = commandResponse[2];
+ result[result.length - 1] = commandResponse[3];
+
+ return result;
+ } else {
+
+ // no data in response
+ byte[] result = new byte[2];
+ result[result.length - 2] = commandResponse[2];
+ result[result.length - 1] = commandResponse[3];
+ return result;
+ }
+ }
+
+ private void incrementSSC() {
+
+ BigInteger ssc = new BigInteger(this.ssc);
+ ssc = ssc.add(new BigInteger("1", 10));
+ this.ssc = ssc.toByteArray();
+ }
+}
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