Fixes to get tests passing

Author: str4d

src/net/i2p/crypto/eddsa/math/radix251/Radix251FieldElement.java

@@ -1,5 +1,6 @@
 package net.i2p.crypto.eddsa.math.radix251;
 
+import net.i2p.crypto.eddsa.TestUtils;
 import net.i2p.crypto.eddsa.math.Field;
 import net.i2p.crypto.eddsa.math.FieldElement;
 
@@ -947,4 +948,24 @@ public FieldElement pow22523() {
         // z_252_3 = z_252_2*z1
         return multiply(t0);
     }
+
+    @Override
+    public int hashCode() {
+        return t.hashCode(); // TODO should this be something else?
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof Radix251FieldElement))
+            return false;
+        Radix251FieldElement fe = (Radix251FieldElement) obj;
+        // XXX why does direct byte[] comparison fail?
+        // TODO should this be constant time?
+        return TestUtils.getHex(toByteArray()).equals(TestUtils.getHex(fe.toByteArray()));
+    }
+
+    @Override
+    public String toString() {
+        return "[Radix251FieldElement val="+TestUtils.getHex(toByteArray())+"]";
+    }
 }

test/net/i2p/crypto/eddsa/math/bigint/BigIntegerFieldElementTest.java

@@ -8,9 +8,6 @@
 import net.i2p.crypto.eddsa.Utils;
 import net.i2p.crypto.eddsa.math.Field;
 import net.i2p.crypto.eddsa.math.FieldElement;
-import net.i2p.crypto.eddsa.spec.EdDSANamedCurveSpec;
-import net.i2p.crypto.eddsa.spec.EdDSANamedCurveTable;
-
 import org.junit.Test;
 
 /**
@@ -22,8 +19,10 @@ public class BigIntegerFieldElementTest {
     static final byte[] BYTES_ONE = Utils.hexToBytes("0100000000000000000000000000000000000000000000000000000000000000");
     static final byte[] BYTES_TEN = Utils.hexToBytes("0a00000000000000000000000000000000000000000000000000000000000000");
 
-    static final EdDSANamedCurveSpec ed25519 = EdDSANamedCurveTable.getByName("ed25519-sha-512");
-    static final Field ed25519Field = ed25519.getCurve().getField();
+    static final Field ed25519Field = new Field(
+            256, // b
+            Utils.hexToBytes("edffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f"), // q
+            new BigIntegerLittleEndianEncoding());
 
     static final FieldElement ZERO = new BigIntegerFieldElement(ed25519Field, BigInteger.ZERO);
     static final FieldElement ONE = new BigIntegerFieldElement(ed25519Field, BigInteger.ONE);