Added more documentation, anomalous curves, support command.

 - Added CURVES.md, FORMAT.md and TESTS.md that talk a bit about what
   ECTester actually does/support.
 - Added anomalous curves (where |F_p| = #|E(F_p)|), meaning these curves
   have a trace of one and ECDLP over them reduces to easy DLP over
   multiplicative F*_p. These concrete curves are from Atsuko Miyaji's
   paper: Elliptic curves over F_p Suitable for Cryptosystems.
 - Added Support command that queries the results of KeyAgreement and
   Signature allocations.
 - Renamed smallpub curves to nonprime curves.
 - Fixed nonprime curves test suite.

1 files changed, 41 insertions, 5 deletions

diff --git a/src/cz/crcs/ectester/applet/ECTesterApplet.java b/src/cz/crcs/ectester/applet/ECTesterApplet.java
index e17d102..f9fb5da 100644
--- a/src/cz/crcs/ectester/applet/ECTesterApplet.java
+++ b/src/cz/crcs/ectester/applet/ECTesterApplet.java
@@ -52,6 +52,7 @@ public class ECTesterApplet extends Applet {
     public static final byte INS_ECDH = (byte) 0x60;
     public static final byte INS_ECDSA = (byte) 0x61;
     public static final byte INS_CLEANUP = (byte) 0x62;
+    public static final byte INS_SUPPORT = (byte) 0x63;
 
     // PARAMETERS for P1 and P2
     public static final byte KEYPAIR_LOCAL = (byte) 0x01;
@@ -74,10 +75,13 @@ public class ECTesterApplet extends Applet {
 
     private RandomData randomData = null;
 
-    private KeyPair localKeypair = null;
-    private KeyPair remoteKeypair = null;
     private ECKeyTester keyTester = null;
+    private short ecdhSW;
+    private short ecdhcSW;
+    private short ecdsaSW;
     private ECKeyGenerator keyGenerator = null;
+    private KeyPair localKeypair = null;
+    private KeyPair remoteKeypair = null;
 
     protected ECTesterApplet(byte[] buffer, short offset, byte length) {
         if (length > 9) {
@@ -102,9 +106,9 @@ public class ECTesterApplet extends Applet {
 
             keyGenerator = new ECKeyGenerator();
             keyTester = new ECKeyTester();
-            keyTester.allocateECDH();
-            keyTester.allocateECDHC();
-            keyTester.allocateECDSA();
+            ecdhSW = keyTester.allocateECDH();
+            ecdhcSW = keyTester.allocateECDHC();
+            ecdsaSW = keyTester.allocateECDSA();
         }
         register();
     }
@@ -152,6 +156,9 @@ public class ECTesterApplet extends Applet {
                 case INS_CLEANUP:
                     insCleanup(apdu);
                     break;
+                case INS_SUPPORT:
+                    insSupport(apdu);
+                    break;
                 default:
                     // The INS code is not supported by the dispatcher
                     ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
@@ -375,6 +382,7 @@ public class ECTesterApplet extends Applet {
 
     /**
      *
+     * @param apdu
      */
     private void insCleanup(APDU apdu) {
         apdu.setIncomingAndReceive();
@@ -386,6 +394,19 @@ public class ECTesterApplet extends Applet {
     }
 
     /**
+     *
+     * @param apdu
+     */
+    private void insSupport(APDU apdu) {
+        apdu.setIncomingAndReceive();
+        byte[] apdubuf = apdu.getBuffer();
+
+        short len = support(apdubuf, (short) 0);
+
+        apdu.setOutgoingAndSend((short) 0, len);
+    }
+
+    /**
      * @param keyPair   which keyPair to use, local/remote (KEYPAIR_* | ...)
      * @param keyLength key length to set
      * @param keyClass  key class to allocate
@@ -606,4 +627,19 @@ public class ECTesterApplet extends Applet {
         Util.setShort(buffer, offset, sw);
         return 2;
     }
+
+    /**
+     *
+     * @param buffer
+     * @param offset
+     * @return
+     */
+    private short support(byte[] buffer, short offset) {
+
+        Util.setShort(buffer, offset, ecdhSW);
+        Util.setShort(buffer, (short) (offset+2), ecdhcSW);
+        Util.setShort(buffer, (short) (offset+4), ecdsaSW);
+
+        return 6;
+    }
 }