5 files changed, 118 insertions, 26 deletions

diff --git a/src/cz/crcs/ectester/applet/AppletBase.java b/src/cz/crcs/ectester/applet/AppletBase.java
index 199d76c..94f790b 100644
--- a/src/cz/crcs/ectester/applet/AppletBase.java
+++ b/src/cz/crcs/ectester/applet/AppletBase.java
@@ -3,6 +3,13 @@ package cz.crcs.ectester.applet;
 import javacard.framework.*;
 import javacard.security.*;
 
+/**
+ * Applet base class, that handles instructions, given
+ * either basic or extended length APDUs.
+ *
+ * @author Petr Svenda petr@svenda.com
+ * @author Jan Jancar johny@neuromancer.sk
+ */
 public abstract class AppletBase extends Applet {
 
     // MAIN INSTRUCTION CLASS
@@ -25,6 +32,8 @@ public abstract class AppletBase extends Applet {
     public static final byte INS_ALLOCATE_SIG = (byte) 0x77;
     public static final byte INS_GET_INFO = (byte) 0x78;
     public static final byte INS_SET_DRY_RUN_MODE = (byte) 0x79;
+    public static final byte INS_BUFFER = (byte) 0x7a;
+    public static final byte INS_PERFORM = (byte) 0x7b;
 
     // PARAMETERS for P1 and P2
     public static final byte KEYPAIR_LOCAL = (byte) 0x01;
@@ -68,6 +77,7 @@ public abstract class AppletBase extends Applet {
     byte[] ramArray = null;
     byte[] ramArray2 = null;
     byte[] apduArray = null;
+    short apduEnd = 0;
 
     RandomData randomData = null;
 
@@ -113,7 +123,18 @@ public abstract class AppletBase extends Applet {
 
         if (cla == CLA_ECTESTERAPPLET) {
             try {
-                readAPDU(apdu, apduArray, APDU_MAX_LENGTH);
+                if (ins == INS_BUFFER) {
+                    apduEnd += readAPDU(apdu, true);
+                    apdu.setOutgoingAndSend((short) 0, (short) 0);
+                    return;
+                } else {
+                    apduEnd = 0;
+                    if (ins == INS_PERFORM) {
+                        ins = apduArray[ISO7816.OFFSET_INS];
+                    } else {
+                        readAPDU(apdu, false);
+                    }
+                }
 
                 short length = 0;
                 switch (ins) {
@@ -201,22 +222,34 @@ public abstract class AppletBase extends Applet {
         } else ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
     }
 
-    private void readAPDU(APDU apdu, byte[] buffer, short length) {
+    private short readAPDU(APDU apdu, boolean skipHeader) {
+        byte[] apduBuffer = apdu.getBuffer();
+
+        short cdataOffset = getOffsetCdata(apdu);
+        /* How much stuff is in apduBuffer */
         short read = apdu.setIncomingAndReceive();
-        read += getOffsetCdata(apdu);
-        short total = getIncomingLength(apdu);
-        if (total > length) {
-            return;
-        }
+        read += cdataOffset;
 
-        byte[] apduBuffer = apdu.getBuffer();
-        short sum = 0;
+        /* Where to start reading from? */
+        short offset = skipHeader ? cdataOffset : 0;
+
+        /* How much stuff was really sent in this APDU? */
+        short total = (short) (getIncomingLength(apdu) + cdataOffset);
+        short todo = (short) (total - offset);
+        /* Can we fit? */
+        if (todo > (short) (apduArray.length - apduEnd)) {
+            return -1;
+        }
 
-        do {
-            Util.arrayCopyNonAtomic(apduBuffer, (short) 0, buffer, sum, read);
-            sum += read;
+        /* How much stuff was copied over. */
+        short written = 0;
+        while (written < todo) {
+            Util.arrayCopyNonAtomic(apduBuffer, offset, apduArray, (short) (apduEnd + written), (short) (read - offset));
+            written += (short) (read - offset);
+            offset = 0;
             read = apdu.receiveBytes((short) 0);
-        } while (sum < total);
+        }
+        return written;
     }
 
     abstract short getOffsetCdata(APDU apdu);
diff --git a/src/cz/crcs/ectester/applet/ECTesterApplet.java b/src/cz/crcs/ectester/applet/ECTesterApplet.java
index 41bee9b..95009aa 100644
--- a/src/cz/crcs/ectester/applet/ECTesterApplet.java
+++ b/src/cz/crcs/ectester/applet/ECTesterApplet.java
@@ -1,6 +1,6 @@
 /*
  * ECTester, tool for testing Elliptic curve cryptography implementations.
- * Copyright (c) 2016-2018 Petr Svenda <petr@svenda.com>
+ * Copyright (c) 2016-2019 Petr Svenda <petr@svenda.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -53,7 +53,7 @@ public class ECTesterApplet extends AppletBase {
 
     short getIncomingLength(APDU apdu) {
         byte[] apduBuffer = apdu.getBuffer();
-        return apduBuffer[ISO7816.OFFSET_LC];
+        return (short) (0xff & apduBuffer[ISO7816.OFFSET_LC]);
     }
 
     short getBase() {
diff --git a/src/cz/crcs/ectester/applet/ECTesterAppletExtended.java b/src/cz/crcs/ectester/applet/ECTesterAppletExtended.java
index 83e0851..8ddfeb9 100644
--- a/src/cz/crcs/ectester/applet/ECTesterAppletExtended.java
+++ b/src/cz/crcs/ectester/applet/ECTesterAppletExtended.java
@@ -1,6 +1,6 @@
 /*
  * ECTester, tool for testing Elliptic curve cryptography implementations.
- * Copyright (c) 2016-2018 Petr Svenda <petr@svenda.com>
+ * Copyright (c) 2016-2019 Petr Svenda <petr@svenda.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
diff --git a/src/cz/crcs/ectester/reader/CardMngr.java b/src/cz/crcs/ectester/reader/CardMngr.java
index 8b6241d..5479f31 100644
--- a/src/cz/crcs/ectester/reader/CardMngr.java
+++ b/src/cz/crcs/ectester/reader/CardMngr.java
@@ -23,6 +23,7 @@ public class CardMngr {
 
     private boolean simulate = false;
     private boolean verbose = true;
+    private boolean extendedLength = false;
 
     private final byte[] selectCM = {
             (byte) 0x00, (byte) 0xa4, (byte) 0x04, (byte) 0x00, (byte) 0x07, (byte) 0xa0, (byte) 0x00, (byte) 0x00,
@@ -51,6 +52,16 @@ public class CardMngr {
         this.simulate = simulate;
     }
 
+    private void connectWithHighest() throws CardException {
+        try {
+            card = terminal.connect("T=1");
+        } catch (CardException ex) {
+            if (verbose)
+                System.out.println("T=1 failed, trying protocol '*'");
+            card = terminal.connect("*");
+        }
+    }
+
     public boolean connectToCard() throws CardException {
         if (simulate)
             return true;
@@ -72,13 +83,7 @@ public class CardMngr {
 
             terminal = terminalList.get(i);
             if (terminal.isCardPresent()) {
-                try {
-                    card = terminal.connect("T=1");
-                } catch (CardException ex) {
-                    if (verbose)
-                        System.out.println("T=1 failed, trying protocol '*'");
-                    card = terminal.connect("*");
-                }
+                connectWithHighest();
 
                 if (verbose)
                     System.out.println("card: " + card);
@@ -132,7 +137,7 @@ public class CardMngr {
         }
 
         if (terminal != null) {
-            card = terminal.connect("*");
+            connectWithHighest();
             if (verbose)
                 System.out.println("card: " + card);
             channel = card.getBasicChannel();
@@ -324,7 +329,36 @@ public class CardMngr {
             System.out.println(ByteUtil.bytesToHex(apdu.getBytes()));
         }
 
-        long elapsed = -System.nanoTime();
+        long elapsed;
+        if (card.getProtocol().equals("T=0") && apdu.getNc() >= 0xff) {
+            if (verbose) {
+                System.out.print("Chunking:");
+            }
+            byte[] data = apdu.getBytes();
+            int numChunks = (data.length + 254) / 255;
+            for (int i = 0; i < numChunks; ++i) {
+                int chunkStart = i *255;
+                int chunkLength = 255;
+                if (chunkStart + chunkLength > data.length) {
+                    chunkLength = data.length - chunkStart;
+                }
+                if (verbose) {
+                    System.out.print(" " + chunkLength);
+                }
+                byte[] chunk = new byte[chunkLength];
+                System.arraycopy(data, chunkStart, chunk, 0, chunkLength);
+                CommandAPDU cmd = new CommandAPDU(apdu.getCLA(), 0x7a, 0, 0, chunk);
+                ResponseAPDU resp = channel.transmit(cmd);
+                if ((short) resp.getSW() != ISO7816.SW_NO_ERROR) {
+                    return resp;
+                }
+            }
+            if (verbose)
+                System.out.println();
+            apdu = new CommandAPDU(apdu.getCLA(), 0x7b, 0, 0, 0xff);
+        }
+
+        elapsed = -System.nanoTime();
 
         ResponseAPDU responseAPDU = channel.transmit(apdu);
 
@@ -372,6 +406,28 @@ public class CardMngr {
             System.out.println(ByteUtil.bytesToHex(apdu.getBytes()));
         }
 
+        /*
+        if (apdu.getNc() >= 0xff) {
+            byte[] data = apdu.getBytes();
+            int numChunks = (data.length + 254) / 255;
+            for (int i = 0; i < numChunks; ++i) {
+                int chunkStart = i *255;
+                int chunkLength = 255;
+                if (chunkStart + chunkLength > data.length) {
+                    chunkLength = data.length - chunkStart;
+                }
+                byte[] chunk = new byte[chunkLength];
+                System.arraycopy(data, chunkStart, chunk, 0, chunkLength);
+                CommandAPDU cmd = new CommandAPDU(apdu.getCLA(), 0x7a, 0, 0, chunk);
+                ResponseAPDU resp = simulator.transmitCommand(cmd);
+                if ((short) resp.getSW() != ISO7816.SW_NO_ERROR) {
+                    return resp;
+                }
+            }
+            apdu = new CommandAPDU(apdu.getCLA(), 0x7b, 0, 0);
+        }
+        */
+
         ResponseAPDU response = simulator.transmitCommand(apdu);
         byte[] responseBytes = response.getBytes();
 
diff --git a/src/cz/crcs/ectester/reader/ECTesterReader.java b/src/cz/crcs/ectester/reader/ECTesterReader.java
index 6372248..9447814 100644
--- a/src/cz/crcs/ectester/reader/ECTesterReader.java
+++ b/src/cz/crcs/ectester/reader/ECTesterReader.java
@@ -1,6 +1,6 @@
 /*
  * ECTester, tool for testing Elliptic curve cryptography implementations.
- * Copyright (c) 2016-2018 Petr Svenda <petr@svenda.com>
+ * Copyright (c) 2016-2019 Petr Svenda <petr@svenda.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -163,6 +163,9 @@ public class ECTesterReader {
                 Security.addProvider(new BouncyCastleProvider());
             } catch (SecurityException | NoClassDefFoundError ignored) {
             }
+            // Make BouncyCastle more lenient when we work with signatures in ASN.1 DER format,
+            // cards sometimes are not fully compliant.
+            System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "true");
 
             //do action
             if (cli.hasOption("export")) {