EdDSA bugfixes

core/java/src/net/i2p/crypto/eddsa/Utils.java

@@ -31,7 +31,7 @@ public class Utils {
         for (int i = 0; i < 32; i++) {
             result |= b[i] ^ c[i];
         }
-        return ~equal(result, 0) & 0x01;
+        return equal(result, 0);
     }
 
     /**

core/java/src/net/i2p/crypto/eddsa/math/ed25519/Ed25519FieldElement.java

@@ -26,7 +26,7 @@ public class Ed25519FieldElement extends FieldElement {
 
     public boolean isNonZero() {
         byte[] s = toByteArray();
-        return Utils.equal(s, ZERO) == 1;
+        return Utils.equal(s, ZERO) == 0;
     }
 
     /**