From 970aa9060a3c1c022dfe04cfeb199a6b790b7635 Mon Sep 17 00:00:00 2001 From: tzefferer Date: Tue, 16 Nov 2010 17:28:33 +0000 Subject: git-svn-id: https://joinup.ec.europa.eu/svn/mocca/trunk@837 8a26b1a7-26f0-462f-b9ef-d0e30c41f5a4 --- .../java/at/gv/egiz/smcc/DNIeSecuredChannel.java | 1087 ++++++++++++++++++++ 1 file changed, 1087 insertions(+) create mode 100644 smcc/src/main/java/at/gv/egiz/smcc/DNIeSecuredChannel.java (limited to 'smcc/src/main/java/at/gv/egiz/smcc/DNIeSecuredChannel.java') 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= 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(); + } +} -- cgit v1.2.3