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-rw-r--r--smccTest/src/main/java/at/gv/egiz/smcc/activation/SecureChannel.java225
1 files changed, 110 insertions, 115 deletions
diff --git a/smccTest/src/main/java/at/gv/egiz/smcc/activation/SecureChannel.java b/smccTest/src/main/java/at/gv/egiz/smcc/activation/SecureChannel.java
index 0590dac2..f8f679e2 100644
--- a/smccTest/src/main/java/at/gv/egiz/smcc/activation/SecureChannel.java
+++ b/smccTest/src/main/java/at/gv/egiz/smcc/activation/SecureChannel.java
@@ -91,30 +91,23 @@ public class SecureChannel extends CardChannel {
try {
if (apdu.length < 4) {
throw new IllegalArgumentException("invalid Command APDU " + toString(apdu));
- } else if (apdu.length == 4) {
- CommandAPDU capdu_ = new CommandAPDU(protectCase1b(apdu));
+ } else if (apdu.length < 6) {
+ CommandAPDU capdu_ = new CommandAPDU(
+ protectNoCommandData(apdu, apdu.length == 5));
log.info("cmd apdu*: {}", toString(capdu_.getBytes()));
ResponseAPDU resp_ = channel.transmit(capdu_);
log.info(" -> resp*: {}", toString(resp_.getBytes()));
- return unProtectCase1b(resp_);
- } else if (apdu.length == 5) {
- CommandAPDU capdu_ = new CommandAPDU(protectCase2(apdu));
+ return unProtectResponse(resp_);
+
+ } else {
+ CommandAPDU capdu_ = new CommandAPDU(
+ protectCommandData(apdu, apdu.length > 5+apdu[4]));
log.info("cmd apdu*: {}", toString(capdu_.getBytes()));
ResponseAPDU resp_ = channel.transmit(capdu_);
log.info(" -> resp*: {}", toString(resp_.getBytes()));
- return unProtectCase2(resp_);
-
- } else if (apdu.length == 5 + apdu[4]) {
- // CLA|INS|P1|P2|Lc|Data -> CLA'|INS|P1|P2|Lc'|TLplain|TLmac
- // 81 (plain value) 8e (cryptographic checksum)
- } else {
- // CLA|INS|P1|P2|Lc|Data|Le -> CLA'|INS|P1|P2|Lc'|TLplain|TLle|TLmac|00
- // 81 (plain value) 97 (Ne) 8e (cryptographic checksum)
- // TODO extended APDUs
+ return unProtectResponse(resp_);
+
}
-
- throw new UnsupportedOperationException("not implemented");
-
} catch (Exception ex) {
System.out.println("failed to transmit protected APDU: " + ex.getMessage());
throw new CardException(ex);
@@ -132,36 +125,46 @@ public class SecureChannel extends CardChannel {
}
/**
- * Case 1 of command-response pair defined in ISO 7816-3
- * no command data, no response data, status not protected
+ * Case 1b/2 of command-response pair defined in ISO 7816-3
+ * no command data, response data
+ *
+ * CLA|INS|P1|P2 -> CLA'|INS|P1|P2|Lc'|TLmac|00
+ * CLA|INS|P1|P2|Le -> CLA'|INS|P1|P2|Lc'|TLle|TLmac|00
*
- * CLA|INS|P1|P2 -> CLA'|INS|P1|P2|Lc'|TLmac
* @param apdu
* @return
* @throws GeneralSecurityException mac-calculation error
*/
- byte[] protectCase1b(byte[] apdu) throws GeneralSecurityException {
+ byte[] protectNoCommandData(byte[] apdu, boolean responseData) throws GeneralSecurityException {
- byte[] apdu_ = new byte[16];
-
- // authenticate header: CLA* b3=1
- apdu_[0] = (byte) (apdu[0] | (byte) 0x0c); // CLA*: b8-6=000 b4-3=11
+ int leLength = (responseData) ? 1 : 0;
+
+ byte[] apdu_ = new byte[16 + 3*leLength];
+ // authenticate header: CLA** b3=1
+ apdu_[0] = (byte) (apdu[0] | (byte) 0x0c); //CLA**: b8-6=000 b4-3=11
apdu_[1] = apdu[1];
apdu_[2] = apdu[2];
apdu_[3] = apdu[3];
- // Lc': TLmac
- apdu_[4] = (byte) (blocksize + 2); //0x0a;
+ // Lc': [TLle] TLmac
+ apdu_[4] = (byte) (3*leLength + 2 + blocksize); //0x0a or 0x0d;
+
+ // T*L Le
+ if (responseData) {
+ apdu_[5] = (byte) 0x97;
+ apdu_[6] = (byte) 0x01;
+ apdu_[7] = apdu[4];
+ }
// cryptographic checksum
- apdu_[5] = (byte) 0x8e;
- apdu_[6] = (byte) blocksize; //0x08;
+ apdu_[5 + 3*leLength] = (byte) 0x8e;
+ apdu_[6 + 3*leLength] = (byte) blocksize; //0x08;
- // Le' (case 1b)
- apdu_[7 + blocksize] = 0x00;
+ // Le'
+ apdu_[apdu_.length-1] = 0x00;
- // 2 data objects: SSC, header
- byte[] mac_in = new byte[2 * blocksize];
+ // 3 data objects: SSC, header, Le
+ byte[] mac_in = new byte[2*blocksize + blocksize*leLength];
// SSC (rightmost blocksize bytes)
incrementSSC();
@@ -171,32 +174,49 @@ public class SecureChannel extends CardChannel {
byte[] paddedHeader = RetailCBCMac.pad(Arrays.copyOf(apdu_, 4), blocksize);
System.arraycopy(paddedHeader, 0, mac_in, blocksize, blocksize);
- byte[] mac = RetailCBCMac.retailMac(mac_in, RetailCBCMac.PADDING.NoPadding,
+ // TL Le
+ if (responseData) {
+ byte[] paddedTLLe = RetailCBCMac.pad(Arrays.copyOfRange(apdu_, 5, 8), blocksize);
+ System.arraycopy(paddedTLLe, 0, mac_in, 2*blocksize, blocksize);
+ }
+
+ byte[] mac = RetailCBCMac.retailMac(mac_in, RetailCBCMac.PADDING.NoPadding,
"DES", "DESede", kmac, blocksize, blocksize);
log.debug("cryptographic checksum ({}): {}", toString(mac_in), toString(mac));
// insert mac in 8E object
- System.arraycopy(mac, 0, apdu_, 7, blocksize);
+ System.arraycopy(mac, 0, apdu_, 7+3*leLength, blocksize);
return apdu_;
}
- ResponseAPDU unProtectCase1b(ResponseAPDU resp_) throws GeneralSecurityException, CardException {
-
- if (resp_.getSW() == 0x9000) {
+ /**
+ * Verify cryptographic checksum for cases 1b/2/3b/4 and decode response apdu
+ *
+ * T*Lsw1sw2 | TLcc -> sw1sw2
+ * T*Lplain | T*Lsw1sw2 | TLcc -> plain | sw1sw2
+ *
+ * @param resp_
+ * @return
+ * @throws GeneralSecurityException
+ * @throws CardException
+ */
+ ResponseAPDU unProtectResponse(ResponseAPDU resp_) throws GeneralSecurityException, CardException {
- byte[] respData = resp_.getData();
+ byte[] respData = resp_.getData();
- // T*Lsw1sw2 | TLcc (CC size == blocksize)
+ if (respData != null && respData.length > 0) {
+
+ int TLccInd = respData.length - (2 + blocksize);
- byte[] mac_in = new byte[blocksize + 4];
+ byte[] mac_in = new byte[respData.length - 2]; //+blocksize-blocksize
- // SSC
+ // SSC (rightmost blocksize bytes)
incrementSSC();
System.arraycopy(kmacssc, kmacssc.length-blocksize, mac_in, 0, blocksize);
// data
- System.arraycopy(respData, 0, resp_, blocksize, 4);
+ System.arraycopy(respData, 0, mac_in, blocksize, TLccInd);
byte[] mac_ = RetailCBCMac.retailMac(mac_in, RetailCBCMac.PADDING.ISO9797_2,
"DES", "DESede", kmac, blocksize, blocksize);
@@ -215,7 +235,15 @@ public class SecureChannel extends CardChannel {
throw new CardException("invalid status-word object " + toString(sw));
}
- return new ResponseAPDU(sw);
+ byte[] plain = respSeq.getValue(0x81);
+ if (plain != null) {
+ byte[] resp = new byte[plain.length + 2];
+ System.arraycopy(plain, 0, resp, 0, plain.length);
+ System.arraycopy(sw, 0, resp, plain.length, 2);
+ return new ResponseAPDU(resp);
+ } else {
+ return new ResponseAPDU(sw);
+ }
}
log.info("unexpected response " + toString(resp_.getBytes()));
@@ -223,41 +251,57 @@ public class SecureChannel extends CardChannel {
}
/**
- * Case 2 of command-response pair defined in ISO 7816-3
- * no command data, response data
- *
- * CLA|INS|P1|P2|Le -> CLA'|INS|P1|P2|Lc'|TLle|TLmac|00
+ * Case 3b/4 of command-response pair defined in ISO 7816-3
+ * command data, no response data
*
+ * CLA|INS|P1|P2|Lc|Data -> CLA'|INS|P1|P2|Lc'|TLplain|TLmac|00
+ * CLA|INS|P1|P2|Lc|Data|Le -> CLA'|INS|P1|P2|Lc'|TLplain|TLle|TLmac|00
+ *
* @param apdu
* @return
* @throws GeneralSecurityException mac-calculation error
*/
- byte[] protectCase2(byte[] apdu) throws GeneralSecurityException {
+ byte[] protectCommandData(byte[] apdu, boolean responseData) throws GeneralSecurityException {
+
+ int leLength = (responseData) ? 1 : 0;
+
+ // header | Lc' | TLplain | [TLLe] | TLmac | 00
+ byte[] apdu_= new byte[4 + 1 + 2+apdu[4] + 3*leLength + 2+blocksize + 1];
- byte[] apdu_ = new byte[19];
// authenticate header: CLA** b3=1
apdu_[0] = (byte) (apdu[0] | (byte) 0x0c); //CLA**: b8-6=000 b4-3=11
apdu_[1] = apdu[1];
apdu_[2] = apdu[2];
apdu_[3] = apdu[3];
- // Lc': TLle TLmac
- apdu_[4] = (byte) (blocksize + 2 + 3); //0x0d;
+ // Lc': TLplain [TLLe] TLmac
+ apdu_[4] = (byte) (2+apdu[4] + 3*leLength + 2+blocksize);
- // Ne
- apdu_[5] = (byte) 0x97;
- apdu_[6] = (byte) 0x01;
- apdu_[7] = apdu[4];
+ // T*L plain
+ apdu_[5] = (byte) 0x81;
+ apdu_[6] = apdu[4];
+ System.arraycopy(apdu, 5, apdu_, 7, apdu[4]);
- // cryptographic checksum
- apdu_[8] = (byte) 0x8e;
- apdu_[9] = (byte) blocksize; //0x08;
+ // T*L Le
+ if (responseData) {
+ apdu_[7+apdu[4]] = (byte) 0x97;
+ apdu_[8+apdu[4]] = (byte) 0x01;
+ apdu_[9+apdu[4]] = apdu[apdu.length-1];
+ }
- // Le'
- apdu_[10 + blocksize] = 0x00;
+ // TL cc
+ apdu_[7 + apdu[4] + 3*leLength] = (byte) 0x8e;
+ apdu_[8 + apdu[4] + 3*leLength] = (byte) blocksize; //0x08;
- // 3 data objects: SSC, header, Le
- byte[] mac_in = new byte[3 * blocksize];
+ apdu_[apdu_.length-1] = (byte) 0x00;
+
+ // TLplain [TLLe] Padding
+ byte[] paddedPlainLe = RetailCBCMac.pad(
+ Arrays.copyOfRange(apdu_, 5, 5+2+apdu[4] + 3*leLength), blocksize);
+ log.trace("padded plain command data: " + toString(paddedPlainLe));
+
+ // 3 blocks: SSC, header|padding, TLplain[TLLe]|padding
+ byte[] mac_in = new byte[2*blocksize + paddedPlainLe.length];
// SSC (rightmost blocksize bytes)
incrementSSC();
@@ -267,67 +311,18 @@ public class SecureChannel extends CardChannel {
byte[] paddedHeader = RetailCBCMac.pad(Arrays.copyOf(apdu_, 4), blocksize);
System.arraycopy(paddedHeader, 0, mac_in, blocksize, blocksize);
- // TL Le
- byte[] paddedTLLe = RetailCBCMac.pad(Arrays.copyOfRange(apdu_, 5, 8), blocksize);
- System.arraycopy(paddedTLLe, 0, mac_in, 2*blocksize, blocksize);
+ System.arraycopy(paddedPlainLe, 0, mac_in, 2*blocksize, paddedPlainLe.length);
- byte[] mac = RetailCBCMac.retailMac(mac_in, RetailCBCMac.PADDING.NoPadding,
+ byte[] mac = RetailCBCMac.retailMac(mac_in, RetailCBCMac.PADDING.NoPadding,
"DES", "DESede", kmac, blocksize, blocksize);
log.debug("cryptographic checksum ({}): {}", toString(mac_in), toString(mac));
// insert mac in 8E object
- System.arraycopy(mac, 0, apdu_, 10, blocksize);
+ System.arraycopy(mac, 0, apdu_, 9 + apdu[4] + 3*leLength, blocksize);
return apdu_;
}
- ResponseAPDU unProtectCase2(ResponseAPDU resp_) throws GeneralSecurityException, CardException {
-
- if (resp_.getSW() == 0x9000) {
-
- byte[] respData = resp_.getData();
-
- // T*Lplain | T*Lsw1sw2 | TLcc (CC size == blocksize)
-
- int TLccInd = respData.length - 2 - blocksize;
-
- byte[] mac_in = new byte[respData.length - 2]; //+blocksize-blocksize
-
- // SSC (rightmost blocksize bytes)
- incrementSSC();
- System.arraycopy(kmacssc, kmacssc.length-blocksize, mac_in, 0, blocksize);
-
- // data
- System.arraycopy(respData, 0, mac_in, blocksize, TLccInd);
-
- byte[] mac_ = RetailCBCMac.retailMac(mac_in, RetailCBCMac.PADDING.ISO9797_2,
- "DES", "DESede", kmac, blocksize, blocksize);
-
- log.debug("cryptographic checksum ({}): {}", toString(mac_in), toString(mac_));
-
- TLVSequence respSeq = new TLVSequence(respData);
-
- byte[] cc = respSeq.getValue(0x8e);
- if (!Arrays.equals(mac_, cc)) {
- throw new CardException("invalid cryptographic checksum " + toString(cc));
- }
-
- byte[] sw = respSeq.getValue(0x99);
- if (sw[0] != (byte) 0x90 || sw[1] != (byte) 0x00) {
- throw new CardException("invalid status-word object " + toString(sw));
- }
-
- byte[] plain = respSeq.getValue(0x81);
- byte[] resp = new byte[plain.length + 2];
- System.arraycopy(plain, 0, resp, 0, plain.length);
- resp[resp.length - 2] = (byte) 0x90;
- resp[resp.length - 1] = (byte) 0x00;
- return new ResponseAPDU(resp);
- }
-
- log.info("unexpected response " + toString(resp_.getBytes()));
- return resp_;
- }
void incrementSSC() {
//TODO
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 16:08:30 +0000