16 files changed, 275 insertions, 198 deletions

diff --git a/src/cz/crcs/ectester/common/ec/EC_Curve.java b/src/cz/crcs/ectester/common/ec/EC_Curve.java
index 478ce7d..19228dc 100644
--- a/src/cz/crcs/ectester/common/ec/EC_Curve.java
+++ b/src/cz/crcs/ectester/common/ec/EC_Curve.java
@@ -1,7 +1,7 @@
 package cz.crcs.ectester.common.ec;
 
 import cz.crcs.ectester.applet.EC_Consts;
-import cz.crcs.ectester.common.Util;
+import cz.crcs.ectester.common.util.ByteUtil;
 import javacard.security.KeyPair;
 
 import java.math.BigInteger;
@@ -60,10 +60,10 @@ public class EC_Curve extends EC_Params {
             field = new ECFieldFp(new BigInteger(1, getData(0)));
         } else {
             byte[][] fieldData = getParam(EC_Consts.PARAMETER_F2M);
-            int m = Util.getShort(fieldData[0], 0);
-            int e1 = Util.getShort(fieldData[1], 0);
-            int e2 = Util.getShort(fieldData[2], 0);
-            int e3 = Util.getShort(fieldData[3], 0);
+            int m = ByteUtil.getShort(fieldData[0], 0);
+            int e1 = ByteUtil.getShort(fieldData[1], 0);
+            int e2 = ByteUtil.getShort(fieldData[2], 0);
+            int e3 = ByteUtil.getShort(fieldData[3], 0);
             int[] powers = new int[]{e1, e2, e3};
             field = new ECFieldF2m(m, powers);
         }
@@ -80,8 +80,50 @@ public class EC_Curve extends EC_Params {
 
         BigInteger n = new BigInteger(1, getParam(EC_Consts.PARAMETER_R)[0]);
 
-        int h = Util.getShort(getParam(EC_Consts.PARAMETER_K)[0], 0);
+        int h = ByteUtil.getShort(getParam(EC_Consts.PARAMETER_K)[0], 0);
 
         return new ECParameterSpec(curve, generator, n, h);
     }
+
+    public static EC_Curve fromSpec(ECParameterSpec spec) {
+        EllipticCurve curve = spec.getCurve();
+        ECField field = curve.getField();
+
+        short bits = (short) field.getFieldSize();
+        byte[][] params;
+        int paramIndex = 0;
+        byte fieldType;
+        if (field instanceof ECFieldFp) {
+            ECFieldFp primeField = (ECFieldFp) field;
+            params = new byte[5][];
+            params[paramIndex++] = primeField.getP().toByteArray();
+            fieldType = KeyPair.ALG_EC_FP;
+        } else if (field instanceof ECFieldF2m) {
+            ECFieldF2m binaryField = (ECFieldF2m) field;
+            params = new byte[8][];
+            params[paramIndex] = new byte[2];
+            ByteUtil.setShort(params[paramIndex++], 0, (short) binaryField.getM());
+            int[] powers = binaryField.getMidTermsOfReductionPolynomial();
+            for (int i = 0; i < 3; ++i) {
+                params[paramIndex] = new byte[2];
+                ByteUtil.setShort(params[paramIndex++], 0, (short) powers[i]);
+            }
+            fieldType = KeyPair.ALG_EC_F2M;
+        } else {
+            throw new IllegalArgumentException("ECParameterSpec with an unknnown field.");
+        }
+
+        ECPoint generator = spec.getGenerator();
+
+        params[paramIndex++] = generator.getAffineX().toByteArray();
+        params[paramIndex++] = generator.getAffineY().toByteArray();
+
+        params[paramIndex++] = spec.getOrder().toByteArray();
+        params[paramIndex] = new byte[2];
+        ByteUtil.setShort(params[paramIndex], 0, (short) spec.getCofactor());
+
+        EC_Curve result = new EC_Curve(bits, fieldType);
+        result.readByteArray(params);
+        return result;
+    }
 }
diff --git a/src/cz/crcs/ectester/common/ec/EC_Data.java b/src/cz/crcs/ectester/common/ec/EC_Data.java
index acd282a..c048ef7 100644
--- a/src/cz/crcs/ectester/common/ec/EC_Data.java
+++ b/src/cz/crcs/ectester/common/ec/EC_Data.java
@@ -1,6 +1,6 @@
 package cz.crcs.ectester.common.ec;
 
-import cz.crcs.ectester.common.Util;
+import cz.crcs.ectester.common.util.ByteUtil;
 
 import java.io.*;
 import java.util.*;
@@ -8,9 +8,10 @@ import java.util.regex.Pattern;
 
 /**
  * A list of byte arrays for holding EC data.
- *
+ * <p>
  * The data can be read from a byte array via <code>readBytes()</code>, from a CSV via <code>readCSV()</code>.
  * The data can be exported to a byte array via <code>flatten()</code> or to a string array via <code>expand()</code>.
+ *
  * @author Jan Jancar johny@neuromancer.sk
  */
 public abstract class EC_Data {
@@ -67,7 +68,7 @@ public abstract class EC_Data {
         ByteArrayOutputStream out = new ByteArrayOutputStream();
         for (byte[] param : data) {
             byte[] length = new byte[2];
-            Util.setShort(length, 0, (short) param.length);
+            ByteUtil.setShort(length, 0, (short) param.length);
 
             out.write(length, 0, 2);
             out.write(param, 0, param.length);
@@ -79,7 +80,7 @@ public abstract class EC_Data {
     public String[] expand() {
         List<String> out = new ArrayList<>(count);
         for (byte[] param : data) {
-            out.add(Util.bytesToHex(param, false));
+            out.add(ByteUtil.bytesToHex(param, false));
         }
 
         return out.toArray(new String[out.size()]);
@@ -97,9 +98,9 @@ public abstract class EC_Data {
     private static byte[] parse(String param) {
         byte[] data;
         if (param.startsWith("0x") || param.startsWith("0X")) {
-            data = Util.hexToBytes(param.substring(2));
+            data = ByteUtil.hexToBytes(param.substring(2));
         } else {
-            data = Util.hexToBytes(param);
+            data = ByteUtil.hexToBytes(param);
         }
         if (data == null)
             return new byte[0];
@@ -141,12 +142,16 @@ public abstract class EC_Data {
     }
 
     public boolean readBytes(byte[] bytes) {
+        if (bytes == null) {
+            return false;
+        }
+
         int offset = 0;
         for (int i = 0; i < count; i++) {
             if (bytes.length - offset < 2) {
                 return false;
             }
-            short paramLength = Util.getShort(bytes, offset);
+            short paramLength = ByteUtil.getShort(bytes, offset);
             offset += 2;
             if (bytes.length < offset + paramLength) {
                 return false;
@@ -158,6 +163,18 @@ public abstract class EC_Data {
         return true;
     }
 
+    public boolean readByteArray(byte[][] bytes) {
+        if (bytes == null || count != bytes.length) {
+            return false;
+        }
+
+        for (int i = 0; i < count; ++i) {
+            data[i] = new byte[bytes[i].length];
+            System.arraycopy(bytes[i], 0, data[i], 0, bytes[i].length);
+        }
+        return true;
+    }
+
     public void writeCSV(OutputStream out) throws IOException {
         Writer w = new OutputStreamWriter(out);
         w.write(String.join(",", expand()));
diff --git a/src/cz/crcs/ectester/common/ec/EC_KAResult.java b/src/cz/crcs/ectester/common/ec/EC_KAResult.java
index 3b74c57..a7b3cd5 100644
--- a/src/cz/crcs/ectester/common/ec/EC_KAResult.java
+++ b/src/cz/crcs/ectester/common/ec/EC_KAResult.java
@@ -1,6 +1,6 @@
 package cz.crcs.ectester.common.ec;
 
-import cz.crcs.ectester.common.Util;
+import cz.crcs.ectester.common.util.CardUtil;
 
 /**
  * A result of EC based Key agreement operation.
@@ -56,7 +56,7 @@ public class EC_KAResult extends EC_Data {
 
     @Override
     public String toString() {
-        String algo = Util.getKA(ka);
+        String algo = CardUtil.getKA(ka);
         return "<" + getId() + "> " + algo + " result over " + curve + ", " + oneKey + " + " + otherKey + (desc == null ? "" : ": " + desc);
     }
 
diff --git a/src/cz/crcs/ectester/common/ec/EC_Params.java b/src/cz/crcs/ectester/common/ec/EC_Params.java
index 3fada93..1c066e7 100644
--- a/src/cz/crcs/ectester/common/ec/EC_Params.java
+++ b/src/cz/crcs/ectester/common/ec/EC_Params.java
@@ -1,7 +1,7 @@
 package cz.crcs.ectester.common.ec;
 
 import cz.crcs.ectester.applet.EC_Consts;
-import cz.crcs.ectester.common.Util;
+import cz.crcs.ectester.common.util.ByteUtil;
 
 import java.io.ByteArrayOutputStream;
 import java.util.ArrayList;
@@ -125,12 +125,12 @@ public class EC_Params extends EC_Data {
                 byte[] param = data[i];
                 if (masked == EC_Consts.PARAMETER_F2M) {
                     //add m, e_1, e_2, e_3
-                    param = Util.concatenate(param, data[i + 1]);
-                    if (!Util.allValue(data[i + 2], (byte) 0)) {
-                        param = Util.concatenate(param, data[i + 2]);
+                    param = ByteUtil.concatenate(param, data[i + 1]);
+                    if (!ByteUtil.allValue(data[i + 2], (byte) 0)) {
+                        param = ByteUtil.concatenate(param, data[i + 2]);
                     }
-                    if (!Util.allValue(data[i + 3], (byte) 0)) {
-                        param = Util.concatenate(param, data[i + 3]);
+                    if (!ByteUtil.allValue(data[i + 3], (byte) 0)) {
+                        param = ByteUtil.concatenate(param, data[i + 3]);
                     }
                     if (!(param.length == 4 || param.length == 8))
                         throw new RuntimeException("PARAMETER_F2M length is not 8.(should be)");
@@ -138,14 +138,14 @@ public class EC_Params extends EC_Data {
                 if (masked == EC_Consts.PARAMETER_G || masked == EC_Consts.PARAMETER_W) {
                     //read another param (the y coord) and put into X962 format.
                     byte[] y = data[i + 1];
-                    param = Util.concatenate(new byte[]{4}, param, y); //<- ugly but works!
+                    param = ByteUtil.concatenate(new byte[]{4}, param, y); //<- ugly but works!
                 }
                 if (param.length == 0)
                     throw new RuntimeException("Empty parameter read?");
 
                 //write length
                 byte[] length = new byte[2];
-                Util.setShort(length, 0, (short) param.length);
+                ByteUtil.setShort(length, 0, (short) param.length);
                 out.write(length, 0, 2);
                 //write data
                 out.write(param, 0, param.length);
@@ -175,15 +175,15 @@ public class EC_Params extends EC_Data {
                 byte[] param = data[index];
                 if (masked == EC_Consts.PARAMETER_F2M) {
                     for (int i = 0; i < 4; ++i) {
-                        out.add(Util.bytesToHex(data[index + i], false));
+                        out.add(ByteUtil.bytesToHex(data[index + i], false));
                     }
                     index += 4;
                 } else if (masked == EC_Consts.PARAMETER_G || masked == EC_Consts.PARAMETER_W) {
-                    out.add(Util.bytesToHex(param, false));
-                    out.add(Util.bytesToHex(data[index + 1], false));
+                    out.add(ByteUtil.bytesToHex(param, false));
+                    out.add(ByteUtil.bytesToHex(data[index + 1], false));
                     index += 2;
                 } else {
-                    out.add(Util.bytesToHex(param, false));
+                    out.add(ByteUtil.bytesToHex(param, false));
                     index++;
                 }
             }
diff --git a/src/cz/crcs/ectester/common/util/ByteUtil.java b/src/cz/crcs/ectester/common/util/ByteUtil.java
new file mode 100644
index 0000000..939e487
--- /dev/null
+++ b/src/cz/crcs/ectester/common/util/ByteUtil.java
@@ -0,0 +1,122 @@
+package cz.crcs.ectester.common.util;
+
+/**
+ * Utility class, some byte/hex manipulation, convenient byte[] methods.
+ *
+ * @author Petr Svenda petr@svenda.com
+ * @author Jan Jancar johny@neuromancer.sk
+ */
+public class ByteUtil {
+    public static short getShort(byte[] array, int offset) {
+        return (short) (((array[offset] & 0xFF) << 8) | (array[offset + 1] & 0xFF));
+    }
+
+    public static void setShort(byte[] array, int offset, short value) {
+        array[offset + 1] = (byte) (value & 0xFF);
+        array[offset] = (byte) ((value >> 8) & 0xFF);
+    }
+
+    public static int diffBytes(byte[] one, int oneOffset, byte[] other, int otherOffset, int length) {
+        for (int i = 0; i < length; ++i) {
+            byte a = one[i + oneOffset];
+            byte b = other[i + otherOffset];
+            if (a != b) {
+                return i;
+            }
+        }
+        return length;
+    }
+
+    public static boolean compareBytes(byte[] one, int oneOffset, byte[] other, int otherOffset, int length) {
+        return diffBytes(one, oneOffset, other, otherOffset, length) == length;
+    }
+
+    public static boolean allValue(byte[] array, byte value) {
+        for (byte a : array) {
+            if (a != value)
+                return false;
+        }
+        return true;
+    }
+
+    public static byte[] hexToBytes(String hex) {
+        return hexToBytes(hex, true);
+    }
+
+    public static byte[] hexToBytes(String hex, boolean bigEndian) {
+        hex = hex.replace(" ", "");
+        int len = hex.length();
+        StringBuilder sb = new StringBuilder();
+
+        if (len % 2 == 1) {
+            sb.append("0");
+            ++len;
+        }
+
+        if (bigEndian) {
+            sb.append(hex);
+        } else {
+            for (int i = 0; i < len / 2; ++i) {
+                if (sb.length() >= 2) {
+                    sb.insert(sb.length() - 2, hex.substring(2 * i, 2 * i + 2));
+                } else {
+                    sb.append(hex.substring(2 * i, 2 * i + 2));
+                }
+
+            }
+        }
+
+        String data = sb.toString();
+        byte[] result = new byte[len / 2];
+        for (int i = 0; i < len; i += 2) {
+            result[i / 2] = (byte) ((Character.digit(data.charAt(i), 16) << 4)
+                    + (Character.digit(data.charAt(i + 1), 16)));
+        }
+        return result;
+    }
+
+    public static String byteToHex(byte data) {
+        return String.format("%02x", data);
+    }
+
+    public static String bytesToHex(byte[] data) {
+        return bytesToHex(data, true);
+    }
+
+    public static String bytesToHex(byte[] data, boolean addSpace) {
+        return bytesToHex(data, 0, data.length, addSpace);
+    }
+
+    public static String bytesToHex(byte[] data, int offset, int len) {
+        return bytesToHex(data, offset, len, true);
+    }
+
+    public static String bytesToHex(byte[] data, int offset, int len, boolean addSpace) {
+        StringBuilder buf = new StringBuilder();
+        for (int i = offset; i < (offset + len); i++) {
+            buf.append(byteToHex(data[i]));
+            if (addSpace && i != (offset + len - 1)) {
+                buf.append(" ");
+            }
+        }
+        return (buf.toString());
+    }
+
+    public static byte[] concatenate(byte[]... arrays) {
+        int len = 0;
+        for (byte[] array : arrays) {
+            if (array == null)
+                continue;
+            len += array.length;
+        }
+        byte[] out = new byte[len];
+        int offset = 0;
+        for (byte[] array : arrays) {
+            if (array == null || array.length == 0)
+                continue;
+            System.arraycopy(array, 0, out, offset, array.length);
+            offset += array.length;
+        }
+        return out;
+    }
+}
diff --git a/src/cz/crcs/ectester/common/Util.java b/src/cz/crcs/ectester/common/util/CardUtil.java
index 0136493..a94c773 100644
--- a/src/cz/crcs/ectester/common/Util.java
+++ b/src/cz/crcs/ectester/common/util/CardUtil.java
@@ -1,4 +1,4 @@
-package cz.crcs.ectester.common;
+package cz.crcs.ectester.common.util;
 
 import cz.crcs.ectester.applet.ECTesterApplet;
 import cz.crcs.ectester.applet.EC_Consts;
@@ -7,127 +7,7 @@ import javacard.security.CryptoException;
 
 import static cz.crcs.ectester.applet.ECTesterApplet.*;
 
-/**
- * Utility class, some byte/hex manipulation, convenient byte[] methods.
- *
- * @author Petr Svenda petr@svenda.com
- * @author Jan Jancar johny@neuromancer.sk
- */
-public class Util {
-
-    public static short getShort(byte[] array, int offset) {
-        return (short) (((array[offset] & 0xFF) << 8) | (array[offset + 1] & 0xFF));
-    }
-
-    public static void setShort(byte[] array, int offset, short value) {
-        array[offset + 1] = (byte) (value & 0xFF);
-        array[offset] = (byte) ((value >> 8) & 0xFF);
-    }
-
-    public static int diffBytes(byte[] one, int oneOffset, byte[] other, int otherOffset, int length) {
-        for (int i = 0; i < length; ++i) {
-            byte a = one[i + oneOffset];
-            byte b = other[i + otherOffset];
-            if (a != b) {
-                return i;
-            }
-        }
-        return length;
-    }
-
-    public static boolean compareBytes(byte[] one, int oneOffset, byte[] other, int otherOffset, int length) {
-        return diffBytes(one, oneOffset, other, otherOffset, length) == length;
-    }
-
-    public static boolean allValue(byte[] array, byte value) {
-        for (byte a : array) {
-            if (a != value)
-                return false;
-        }
-        return true;
-    }
-
-    public static byte[] hexToBytes(String hex) {
-        return hexToBytes(hex, true);
-    }
-
-    public static byte[] hexToBytes(String hex, boolean bigEndian) {
-        hex = hex.replace(" ", "");
-        int len = hex.length();
-        StringBuilder sb = new StringBuilder();
-
-        if (len % 2 == 1) {
-            sb.append("0");
-            ++len;
-        }
-
-        if (bigEndian) {
-            sb.append(hex);
-        } else {
-            for (int i = 0; i < len / 2; ++i) {
-                if (sb.length() >= 2) {
-                    sb.insert(sb.length() - 2, hex.substring(2 * i, 2 * i + 2));
-                } else {
-                    sb.append(hex.substring(2 * i, 2 * i + 2));
-                }
-
-            }
-        }
-
-        String data = sb.toString();
-        byte[] result = new byte[len / 2];
-        for (int i = 0; i < len; i += 2) {
-            result[i / 2] = (byte) ((Character.digit(data.charAt(i), 16) << 4)
-                    + (Character.digit(data.charAt(i + 1), 16)));
-        }
-        return result;
-    }
-
-    public static String byteToHex(byte data) {
-        return String.format("%02x", data);
-    }
-
-    public static String bytesToHex(byte[] data) {
-        return bytesToHex(data, true);
-    }
-
-    public static String bytesToHex(byte[] data, boolean addSpace) {
-        return bytesToHex(data, 0, data.length, addSpace);
-    }
-
-    public static String bytesToHex(byte[] data, int offset, int len) {
-        return bytesToHex(data, offset, len, true);
-    }
-
-    public static String bytesToHex(byte[] data, int offset, int len, boolean addSpace) {
-        StringBuilder buf = new StringBuilder();
-        for (int i = offset; i < (offset + len); i++) {
-            buf.append(byteToHex(data[i]));
-            if (addSpace && i != (offset + len - 1)) {
-                buf.append(" ");
-            }
-        }
-        return (buf.toString());
-    }
-
-    public static byte[] concatenate(byte[]... arrays) {
-        int len = 0;
-        for (byte[] array : arrays) {
-            if (array == null)
-                continue;
-            len += array.length;
-        }
-        byte[] out = new byte[len];
-        int offset = 0;
-        for (byte[] array : arrays) {
-            if (array == null || array.length == 0)
-                continue;
-            System.arraycopy(array, 0, out, offset, array.length);
-            offset += array.length;
-        }
-        return out;
-    }
-
+public class CardUtil {
     public static String getSWSource(short sw) {
         switch (sw) {
             case ISO7816.SW_NO_ERROR:
diff --git a/src/cz/crcs/ectester/reader/CardMngr.java b/src/cz/crcs/ectester/reader/CardMngr.java
index ad5b368..cea46bc 100644
--- a/src/cz/crcs/ectester/reader/CardMngr.java
+++ b/src/cz/crcs/ectester/reader/CardMngr.java
@@ -2,7 +2,7 @@ package cz.crcs.ectester.reader;
 
 import com.licel.jcardsim.io.CAD;
 import com.licel.jcardsim.io.JavaxSmartCardInterface;
-import cz.crcs.ectester.common.Util;
+import cz.crcs.ectester.common.util.ByteUtil;
 import javacard.framework.AID;
 
 import javax.smartcardio.*;
@@ -80,7 +80,7 @@ public class CardMngr {
 
                 //reset the card
                 if (verbose)
-                    System.out.println(Util.bytesToHex(card.getATR().getBytes()));
+                    System.out.println(ByteUtil.bytesToHex(card.getATR().getBytes()));
 
                 cardFound = true;
             }
@@ -109,7 +109,7 @@ public class CardMngr {
                     try {
                         card = terminal.connect("*");
                         ATR atr = card.getATR();
-                        System.out.println(terminalIndex + " : " + terminal.getName() + " - " + Util.bytesToHex(atr.getBytes()));
+                        System.out.println(terminalIndex + " : " + terminal.getName() + " - " + ByteUtil.bytesToHex(atr.getBytes()));
                         terminalIndex++;
                     } catch (CardException ex) {
                         ex.printStackTrace(System.out);
@@ -227,7 +227,7 @@ public class CardMngr {
             System.out.println(">>>>");
             System.out.println(apdu);
 
-            System.out.println(Util.bytesToHex(apdu.getBytes()));
+            System.out.println(ByteUtil.bytesToHex(apdu.getBytes()));
         }
 
         long elapsed = -System.nanoTime();
@@ -238,7 +238,7 @@ public class CardMngr {
 
         if (verbose) {
             System.out.println(responseAPDU);
-            System.out.println(Util.bytesToHex(responseAPDU.getBytes()));
+            System.out.println(ByteUtil.bytesToHex(responseAPDU.getBytes()));
         }
 
         if (responseAPDU.getSW1() == (byte) 0x61) {
@@ -248,7 +248,7 @@ public class CardMngr {
 
             responseAPDU = channel.transmit(apduToSend);
             if (verbose)
-                System.out.println(Util.bytesToHex(responseAPDU.getBytes()));
+                System.out.println(ByteUtil.bytesToHex(responseAPDU.getBytes()));
         }
 
         if (verbose) {
@@ -277,7 +277,7 @@ public class CardMngr {
         if (verbose) {
             System.out.println(">>>>");
             System.out.println(apdu);
-            System.out.println(Util.bytesToHex(apdu.getBytes()));
+            System.out.println(ByteUtil.bytesToHex(apdu.getBytes()));
         }
 
         ResponseAPDU response = simulator.transmitCommand(apdu);
@@ -285,7 +285,7 @@ public class CardMngr {
 
         if (verbose) {
             System.out.println(response);
-            System.out.println(Util.bytesToHex(responseBytes));
+            System.out.println(ByteUtil.bytesToHex(responseBytes));
             System.out.println("<<<<");
         }
 
diff --git a/src/cz/crcs/ectester/reader/ECTesterReader.java b/src/cz/crcs/ectester/reader/ECTesterReader.java
index 2c57107..d32d9d8 100644
--- a/src/cz/crcs/ectester/reader/ECTesterReader.java
+++ b/src/cz/crcs/ectester/reader/ECTesterReader.java
@@ -24,10 +24,10 @@ package cz.crcs.ectester.reader;
 import cz.crcs.ectester.applet.ECTesterApplet;
 import cz.crcs.ectester.applet.EC_Consts;
 import cz.crcs.ectester.common.cli.CLITools;
-import cz.crcs.ectester.common.Util;
 import cz.crcs.ectester.common.ec.EC_Params;
 import cz.crcs.ectester.common.output.OutputLogger;
 import cz.crcs.ectester.common.test.TestException;
+import cz.crcs.ectester.common.util.ByteUtil;
 import cz.crcs.ectester.data.EC_Store;
 import cz.crcs.ectester.reader.command.Command;
 import cz.crcs.ectester.reader.output.*;
@@ -385,8 +385,8 @@ public class ECTesterReader {
             }
             respWriter.outputResponse(response);
 
-            String pub = Util.bytesToHex(export.getParameter(ECTesterApplet.KEYPAIR_LOCAL, EC_Consts.PARAMETER_W), false);
-            String priv = Util.bytesToHex(export.getParameter(ECTesterApplet.KEYPAIR_LOCAL, EC_Consts.PARAMETER_S), false);
+            String pub = ByteUtil.bytesToHex(export.getParameter(ECTesterApplet.KEYPAIR_LOCAL, EC_Consts.PARAMETER_W), false);
+            String priv = ByteUtil.bytesToHex(export.getParameter(ECTesterApplet.KEYPAIR_LOCAL, EC_Consts.PARAMETER_S), false);
             String line = String.format("%d;%d;%s;%s\n", generated, elapsed / 1000000, pub, priv);
             keysFile.write(line);
             keysFile.flush();
@@ -507,7 +507,7 @@ public class ECTesterReader {
             }
 
             if (out != null) {
-                out.write(String.format("%d;%d;%s\n", done, perform.getDuration() / 1000000, Util.bytesToHex(perform.getSecret(), false)));
+                out.write(String.format("%d;%d;%s\n", done, perform.getDuration() / 1000000, ByteUtil.bytesToHex(perform.getSecret(), false)));
             }
 
             ++done;
@@ -584,7 +584,7 @@ public class ECTesterReader {
             }
 
             if (out != null) {
-                out.write(String.format("%d;%d;%s\n", done, perform.getDuration() / 1000000, Util.bytesToHex(perform.getSignature(), false)));
+                out.write(String.format("%d;%d;%s\n", done, perform.getDuration() / 1000000, ByteUtil.bytesToHex(perform.getSignature(), false)));
             }
 
             ++done;
diff --git a/src/cz/crcs/ectester/reader/command/Command.java b/src/cz/crcs/ectester/reader/command/Command.java
index 9d23322..b60db53 100644
--- a/src/cz/crcs/ectester/reader/command/Command.java
+++ b/src/cz/crcs/ectester/reader/command/Command.java
@@ -2,11 +2,11 @@ package cz.crcs.ectester.reader.command;
 
 import cz.crcs.ectester.applet.ECTesterApplet;
 import cz.crcs.ectester.applet.EC_Consts;
+import cz.crcs.ectester.common.util.ByteUtil;
 import cz.crcs.ectester.data.EC_Store;
 import cz.crcs.ectester.reader.CardMngr;
 import cz.crcs.ectester.reader.ECTesterReader;
 import cz.crcs.ectester.reader.response.Response;
-import cz.crcs.ectester.common.Util;
 import cz.crcs.ectester.common.ec.EC_Curve;
 import cz.crcs.ectester.common.ec.EC_Key;
 import cz.crcs.ectester.common.ec.EC_Keypair;
@@ -174,7 +174,7 @@ public abstract class Command {
             if (privkey == null) {
                 throw new IOException("Couldn't read the private key file correctly.");
             }
-            data = Util.concatenate(data, privkey);
+            data = ByteUtil.concatenate(data, privkey);
         }
         return new Command.Set(cardManager, keyPair, EC_Consts.CURVE_external, params, data);
     }
@@ -203,7 +203,7 @@ public abstract class Command {
             this.keyClass = keyClass;
 
             byte[] data = new byte[]{0, 0, keyClass};
-            Util.setShort(data, 0, keyLength);
+            ByteUtil.setShort(data, 0, keyLength);
             this.cmd = new CommandAPDU(ECTesterApplet.CLA_ECTESTERAPPLET, ECTesterApplet.INS_ALLOCATE, keyPair, 0x00, data);
         }
 
@@ -296,7 +296,7 @@ public abstract class Command {
 
             int len = external != null ? 2 + external.length : 2;
             byte[] data = new byte[len];
-            Util.setShort(data, 0, params);
+            ByteUtil.setShort(data, 0, params);
             if (external != null) {
                 System.arraycopy(external, 0, data, 2, external.length);
             }
@@ -337,7 +337,7 @@ public abstract class Command {
             this.corruption = corruption;
 
             byte[] data = new byte[3];
-            Util.setShort(data, 0, params);
+            ByteUtil.setShort(data, 0, params);
             data[2] = corruption;
 
             this.cmd = new CommandAPDU(ECTesterApplet.CLA_ECTESTERAPPLET, ECTesterApplet.INS_CORRUPT, keyPair, key, data);
@@ -403,7 +403,7 @@ public abstract class Command {
             this.params = params;
 
             byte[] data = new byte[2];
-            Util.setShort(data, 0, params);
+            ByteUtil.setShort(data, 0, params);
 
             this.cmd = new CommandAPDU(ECTesterApplet.CLA_ECTESTERAPPLET, ECTesterApplet.INS_EXPORT, keyPair, key, data);
         }
@@ -446,7 +446,7 @@ public abstract class Command {
             this.type = type;
 
             byte[] data = new byte[]{export, 0,0, type};
-            Util.setShort(data, 1, corruption);
+            ByteUtil.setShort(data, 1, corruption);
 
             this.cmd = new CommandAPDU(ECTesterApplet.CLA_ECTESTERAPPLET, ECTesterApplet.INS_ECDH, pubkey, privkey, data);
         }
@@ -489,7 +489,7 @@ public abstract class Command {
             this.pubkey = pubkey;
 
             byte[] data = new byte[3 + pubkey.length];
-            Util.setShort(data, 0, corruption);
+            ByteUtil.setShort(data, 0, corruption);
             data[2] = type;
             System.arraycopy(pubkey, 0, data, 3, pubkey.length);
 
@@ -526,7 +526,7 @@ public abstract class Command {
 
             int len = raw != null ? raw.length : 0;
             byte[] data = new byte[2 + len];
-            Util.setShort(data, 0, (short) len);
+            ByteUtil.setShort(data, 0, (short) len);
             if (raw != null) {
                 System.arraycopy(raw, 0, data, 2, len);
             }
diff --git a/src/cz/crcs/ectester/reader/output/ResponseWriter.java b/src/cz/crcs/ectester/reader/output/ResponseWriter.java
index 0f5b6e8..1dbfdfa 100644
--- a/src/cz/crcs/ectester/reader/output/ResponseWriter.java
+++ b/src/cz/crcs/ectester/reader/output/ResponseWriter.java
@@ -1,6 +1,6 @@
 package cz.crcs.ectester.reader.output;
 
-import cz.crcs.ectester.common.Util;
+import cz.crcs.ectester.common.util.CardUtil;
 import cz.crcs.ectester.reader.response.Response;
 
 import java.io.PrintStream;
@@ -20,11 +20,11 @@ public class ResponseWriter {
         for (int j = 0; j < r.getNumSW(); ++j) {
             short sw = r.getSW(j);
             if (sw != 0) {
-                suffix.append(" ").append(Util.getSWString(sw));
+                suffix.append(" ").append(CardUtil.getSWString(sw));
             }
         }
         if (suffix.length() == 0) {
-            suffix.append(" [").append(Util.getSW(r.getNaturalSW())).append("]");
+            suffix.append(" [").append(CardUtil.getSW(r.getNaturalSW())).append("]");
         }
         return String.format("%4d ms ┃ %s", r.getDuration() / 1000000, suffix);
     }
diff --git a/src/cz/crcs/ectester/reader/output/XMLTestWriter.java b/src/cz/crcs/ectester/reader/output/XMLTestWriter.java
index 0a5155b..ebc93ac 100644
--- a/src/cz/crcs/ectester/reader/output/XMLTestWriter.java
+++ b/src/cz/crcs/ectester/reader/output/XMLTestWriter.java
@@ -1,7 +1,7 @@
 package cz.crcs.ectester.reader.output;
 
 import cz.crcs.ectester.common.test.CompoundTest;
-import cz.crcs.ectester.common.Util;
+import cz.crcs.ectester.common.util.ByteUtil;
 import cz.crcs.ectester.reader.command.Command;
 import cz.crcs.ectester.reader.response.Response;
 import cz.crcs.ectester.common.test.Test;
@@ -51,7 +51,7 @@ public class XMLTestWriter implements TestWriter {
         Element commandElem = doc.createElement("command");
 
         Element apdu = doc.createElement("apdu");
-        apdu.setTextContent(Util.bytesToHex(c.getAPDU().getBytes()));
+        apdu.setTextContent(ByteUtil.bytesToHex(c.getAPDU().getBytes()));
         commandElem.appendChild(apdu);
 
         return commandElem;
@@ -62,7 +62,7 @@ public class XMLTestWriter implements TestWriter {
         responseElem.setAttribute("successful", r.successful() ? "true" : "false");
 
         Element apdu = doc.createElement("apdu");
-        apdu.setTextContent(Util.bytesToHex(r.getAPDU().getBytes()));
+        apdu.setTextContent(ByteUtil.bytesToHex(r.getAPDU().getBytes()));
         responseElem.appendChild(apdu);
 
         Element naturalSW = doc.createElement("natural-sw");
diff --git a/src/cz/crcs/ectester/reader/output/YAMLTestWriter.java b/src/cz/crcs/ectester/reader/output/YAMLTestWriter.java
index 84f1eac..d8350ac 100644
--- a/src/cz/crcs/ectester/reader/output/YAMLTestWriter.java
+++ b/src/cz/crcs/ectester/reader/output/YAMLTestWriter.java
@@ -1,7 +1,7 @@
 package cz.crcs.ectester.reader.output;
 
 import cz.crcs.ectester.common.test.CompoundTest;
-import cz.crcs.ectester.common.Util;
+import cz.crcs.ectester.common.util.ByteUtil;
 import cz.crcs.ectester.reader.command.Command;
 import cz.crcs.ectester.reader.response.Response;
 import cz.crcs.ectester.common.test.Test;
@@ -44,14 +44,14 @@ public class YAMLTestWriter implements TestWriter {
 
     private Map<String, Object> commandObject(Command c) {
         Map<String, Object> commandObj = new HashMap<>();
-        commandObj.put("apdu", Util.bytesToHex(c.getAPDU().getBytes()));
+        commandObj.put("apdu", ByteUtil.bytesToHex(c.getAPDU().getBytes()));
         return commandObj;
     }
 
     private Map<String, Object> responseObject(Response r) {
         Map<String, Object> responseObj = new HashMap<>();
         responseObj.put("successful", r.successful());
-        responseObj.put("apdu", Util.bytesToHex(r.getAPDU().getBytes()));
+        responseObj.put("apdu", ByteUtil.bytesToHex(r.getAPDU().getBytes()));
         responseObj.put("natural_sw", Short.toUnsignedInt(r.getNaturalSW()));
         List<Integer> sws = new LinkedList<>();
         for (int i = 0; i < r.getNumSW(); ++i) {
diff --git a/src/cz/crcs/ectester/reader/response/Response.java b/src/cz/crcs/ectester/reader/response/Response.java
index 4158ac3..d8edf9e 100644
--- a/src/cz/crcs/ectester/reader/response/Response.java
+++ b/src/cz/crcs/ectester/reader/response/Response.java
@@ -2,7 +2,8 @@ package cz.crcs.ectester.reader.response;
 
 import cz.crcs.ectester.applet.ECTesterApplet;
 import cz.crcs.ectester.applet.EC_Consts;
-import cz.crcs.ectester.common.Util;
+import cz.crcs.ectester.common.util.ByteUtil;
+import cz.crcs.ectester.common.util.CardUtil;
 import javacard.framework.ISO7816;
 import javacard.security.KeyPair;
 
@@ -36,7 +37,7 @@ public abstract class Response {
         //parse SWs in response
         for (int i = 0; i < numSW; ++i) {
             if (getLength() >= (offset + 2)) {
-                short sw = Util.getShort(data, offset);
+                short sw = ByteUtil.getShort(data, offset);
                 offset += 2;
                 sws[i] = sw;
                 if (sw != ISO7816.SW_NO_ERROR) {
@@ -62,7 +63,7 @@ public abstract class Response {
                 error = true;
                 break;
             }
-            short paramLength = Util.getShort(data, offset);
+            short paramLength = ByteUtil.getShort(data, offset);
             offset += 2;
             if (data.length < offset + paramLength) {
                 error = true;
@@ -140,7 +141,7 @@ public abstract class Response {
 
         @Override
         public String getDescription() {
-            return String.format("Allocated KeyAgreement(%s) object", Util.getKATypeString(this.kaType));
+            return String.format("Allocated KeyAgreement(%s) object", CardUtil.getKATypeString(this.kaType));
         }
 
     }
@@ -289,7 +290,7 @@ public abstract class Response {
 
         @Override
         public String getDescription() {
-            String corrupt = Util.getCorruption(corruption);
+            String corrupt = CardUtil.getCorruption(corruption);
 
             String pair;
             if (keyPair == ECTesterApplet.KEYPAIR_BOTH) {
@@ -476,7 +477,7 @@ public abstract class Response {
 
         @Override
         public String getDescription() {
-            String algo = Util.getKA(type);
+            String algo = CardUtil.getKA(type);
 
             String pub = pubkey == ECTesterApplet.KEYPAIR_LOCAL ? "local" : "remote";
             String priv = privkey == ECTesterApplet.KEYPAIR_LOCAL ? "local" : "remote";
@@ -485,7 +486,7 @@ public abstract class Response {
             if (corruption == EC_Consts.CORRUPTION_NONE) {
                 validity = "unchanged";
             } else {
-                validity = Util.getCorruption(corruption);
+                validity = CardUtil.getCorruption(corruption);
             }
             return String.format("%s of %s pubkey and %s privkey(%s point)", algo, pub, priv, validity);
         }
diff --git a/src/cz/crcs/ectester/reader/test/TestVectorSuite.java b/src/cz/crcs/ectester/reader/test/TestVectorSuite.java
index 77653d1..98172f3 100644
--- a/src/cz/crcs/ectester/reader/test/TestVectorSuite.java
+++ b/src/cz/crcs/ectester/reader/test/TestVectorSuite.java
@@ -5,10 +5,10 @@ import cz.crcs.ectester.applet.EC_Consts;
 import cz.crcs.ectester.common.test.CompoundTest;
 import cz.crcs.ectester.common.test.Result;
 import cz.crcs.ectester.common.test.Test;
+import cz.crcs.ectester.common.util.ByteUtil;
 import cz.crcs.ectester.data.EC_Store;
 import cz.crcs.ectester.reader.CardMngr;
 import cz.crcs.ectester.reader.ECTesterReader;
-import cz.crcs.ectester.common.Util;
 import cz.crcs.ectester.reader.command.Command;
 import cz.crcs.ectester.common.ec.*;
 import cz.crcs.ectester.reader.response.Response;
@@ -72,8 +72,8 @@ public class TestVectorSuite extends TestSuite {
                     return new Result(Value.FAILURE, "ECDH was unsuccessful.");
                 if (!dh.hasSecret())
                     return new Result(Value.FAILURE, "ECDH response did not contain the derived secret.");
-                if (!Util.compareBytes(dh.getSecret(), 0, result.getData(0), 0, dh.secretLength())) {
-                    int firstDiff = Util.diffBytes(dh.getSecret(), 0, result.getData(0), 0, dh.secretLength());
+                if (!ByteUtil.compareBytes(dh.getSecret(), 0, result.getData(0), 0, dh.secretLength())) {
+                    int firstDiff = ByteUtil.diffBytes(dh.getSecret(), 0, result.getData(0), 0, dh.secretLength());
                     return new Result(Value.FAILURE, "ECDH derived secret does not match the test, first difference was at byte " + String.valueOf(firstDiff) + ".");
                 }
                 return new Result(Value.SUCCESS);
diff --git a/src/cz/crcs/ectester/standalone/ECTesterStandalone.java b/src/cz/crcs/ectester/standalone/ECTesterStandalone.java
index 049626e..9f100d0 100644
--- a/src/cz/crcs/ectester/standalone/ECTesterStandalone.java
+++ b/src/cz/crcs/ectester/standalone/ECTesterStandalone.java
@@ -2,6 +2,7 @@ package cz.crcs.ectester.standalone;
 
 import cz.crcs.ectester.common.cli.*;
 import cz.crcs.ectester.common.ec.EC_Curve;
+import cz.crcs.ectester.common.util.ByteUtil;
 import cz.crcs.ectester.data.EC_Store;
 import cz.crcs.ectester.standalone.consts.KeyAgreementIdent;
 import cz.crcs.ectester.standalone.consts.KeyPairGeneratorIdent;
@@ -21,6 +22,7 @@ import java.security.KeyPair;
 import java.security.KeyPairGenerator;
 import java.security.NoSuchAlgorithmException;
 import java.security.interfaces.ECPrivateKey;
+import java.security.interfaces.ECPublicKey;
 import java.security.spec.ECParameterSpec;
 import java.util.*;
 import java.util.stream.Collectors;
@@ -49,12 +51,12 @@ public class ECTesterStandalone {
         try {
             cli = parseArgs(args);
 
-            if (cli.hasOption("help") || cli.getNext() == null) {
-                CLITools.help("ECTesterStandalone.jar", CLI_HEADER, opts, optParser, CLI_FOOTER, true);
-                return;
-            } else if (cli.hasOption("version")) {
+            if (cli.hasOption("version")) {
                 CLITools.version(DESCRIPTION, LICENSE);
                 return;
+            } else if (cli.hasOption("help") || cli.getNext() == null) {
+                CLITools.help("ECTesterStandalone.jar", CLI_HEADER, opts, optParser, CLI_FOOTER, true);
+                return;
             }
 
 
@@ -209,12 +211,19 @@ public class ECTesterStandalone {
                     }
                     kpg.initialize(curve.toSpec());
                 }
+                System.out.println("index;time;pubW;privS");
 
                 int amount = Integer.parseInt(cli.getOptionValue("generate.amount", "1"));
                 for (int i = 0; i < amount; ++i) {
+                    long elapsed = -System.nanoTime();
                     KeyPair kp = kpg.genKeyPair();
+                    elapsed += System.nanoTime();
+                    ECPublicKey publicKey = (ECPublicKey) kp.getPublic();
                     ECPrivateKey privateKey = (ECPrivateKey) kp.getPrivate();
-                    System.out.println(privateKey);
+
+                    String pub = ByteUtil.bytesToHex(publicKey.getEncoded(), false);
+                    String priv = ByteUtil.bytesToHex(privateKey.getEncoded(), false);
+                    System.out.println(String.format("%d;%d;%s;%s", i, elapsed / 1000000, pub, priv));
                 }
             }
         }
@@ -253,6 +262,8 @@ public class ECTesterStandalone {
                 ECPrivateKey privateKey = (ECPrivateKey) kp.getPrivate();
                 ECParameterSpec params = privateKey.getParams();
                 System.out.println(params);
+                EC_Curve curve = EC_Curve.fromSpec(params);
+                System.out.println(curve);
             }
         }
     }
diff --git a/src/cz/crcs/ectester/standalone/test/KeyGenerationTestable.java b/src/cz/crcs/ectester/standalone/test/KeyGenerationTestable.java
index 8ad425b..381ce70 100644
--- a/src/cz/crcs/ectester/standalone/test/KeyGenerationTestable.java
+++ b/src/cz/crcs/ectester/standalone/test/KeyGenerationTestable.java
@@ -12,12 +12,16 @@ public class KeyGenerationTestable implements Testable {
 
     private KeyPair kp;
     private KeyPairGenerator kpg;
-    private int keysize;
-    private ECParameterSpec spec;
+    private int keysize = 0;
+    private ECParameterSpec spec = null;
     private boolean hasRun;
     private boolean error = false;
     private boolean ok;
 
+    public KeyGenerationTestable(KeyPairGenerator kpg) {
+        this.kpg = kpg;
+    }
+
     public KeyGenerationTestable(KeyPairGenerator kpg, int keysize) {
         this.kpg = kpg;
         this.keysize = keysize;
@@ -42,7 +46,7 @@ public class KeyGenerationTestable implements Testable {
         try {
             if (spec != null) {
                 kpg.initialize(spec);
-            } else {
+            } else if (keysize != 0) {
                 kpg.initialize(keysize);
             }
         } catch (InvalidAlgorithmParameterException e) {