Nettle support (#4)

* Added Nettle java file, added Nettle class to NativeProvider files

* Nettle makefile

* Nettle get curves and setup

* makefile and build-standalone

* makefile hogweed

* added other curves

* mpz to biginteger

* switch nignum to mpz

* it is finally possible to write nettle info

* prepared generate curve

* generate key pair progress

* removed key agreement

* ECParameterSpec experiment

* ECParameterSpec experiment - source

* Another try

* it is finally running (at least), debugging messages

* generator generates - needs to be tested

* removed unnecessary function

* signature preparations

* signature almost done

* added der encoding

* verification and der decoder

* added support for secp192r1, secp224r1, secp384r1 and secp521r1

* fixed the variable length of the points and scalars

* removed debug prints

* removed debug prints (java)

* removed Curve25519 artifacts, added ECDH support

* removed fragment of openssl, added cleanup to ecdh

* src/cz/crcs/ectester/standalone/libs/jni/nettle.c

* reverted plot

* fixed signature for secp521r1

* replaced for loop with memset

* added nettle to requirements in NettleLib class

* removed conflicting lines

* fixed the der signature encoder / decoder

* Switched ECGenParameterSpec -> ECParameterSpec explicit retyping to EC_Store

Co-authored-by: Ján Jančár <J08nY@users.noreply.github.com>

1 files changed, 41 insertions, 1 deletions

diff --git a/src/cz/crcs/ectester/standalone/libs/jni/NativeKeyPairGeneratorSpi.java b/src/cz/crcs/ectester/standalone/libs/jni/NativeKeyPairGeneratorSpi.java
index 3598d61..636f423 100644
--- a/src/cz/crcs/ectester/standalone/libs/jni/NativeKeyPairGeneratorSpi.java
+++ b/src/cz/crcs/ectester/standalone/libs/jni/NativeKeyPairGeneratorSpi.java
@@ -1,7 +1,14 @@
 package cz.crcs.ectester.standalone.libs.jni;
 
+import cz.crcs.ectester.common.ec.EC_Curve;
+import cz.crcs.ectester.data.EC_Store;
+
 import java.security.*;
 import java.security.spec.AlgorithmParameterSpec;
+import java.security.AlgorithmParameters;
+import java.security.spec.ECGenParameterSpec;
+import java.security.spec.ECParameterSpec;
+import java.security.spec.InvalidParameterSpecException;
 
 /**
  * @author Jan Jancar johny@neuromancer.sk
@@ -62,6 +69,7 @@ public abstract class NativeKeyPairGeneratorSpi extends KeyPairGeneratorSpi {
 
     abstract KeyPair generate(AlgorithmParameterSpec params, SecureRandom random);
 
+
     public static class TomCrypt extends NativeKeyPairGeneratorSpi {
 
         public TomCrypt() {
@@ -306,8 +314,9 @@ public abstract class NativeKeyPairGeneratorSpi extends KeyPairGeneratorSpi {
         @Override
         native KeyPair generate(AlgorithmParameterSpec params, SecureRandom random);
     }
-
+  
     public static class Libressl extends NativeKeyPairGeneratorSpi {
+
         public Libressl() {
             initialize(256, new SecureRandom());
         }
@@ -324,4 +333,35 @@ public abstract class NativeKeyPairGeneratorSpi extends KeyPairGeneratorSpi {
         @Override
         native KeyPair generate(AlgorithmParameterSpec params, SecureRandom random);
     }
+
+    public static class Nettle extends NativeKeyPairGeneratorSpi {
+        public Nettle() {
+            initialize(256, new SecureRandom());
+        }
+
+        @Override
+        native boolean keysizeSupported(int keysize);
+
+        @Override
+        native boolean paramsSupported(AlgorithmParameterSpec params);
+
+        @Override
+        native KeyPair generate(int keysize, SecureRandom random);
+
+        @Override
+        KeyPair generate(AlgorithmParameterSpec params, SecureRandom random) {
+            if (params instanceof ECGenParameterSpec) {
+                    String curveName = ((ECGenParameterSpec) params).getName();
+                    if (curveName.contains("secp")) {
+                        curveName = "secg/" + curveName;
+                    }
+                    EC_Curve curve = EC_Store.getInstance().getObject(EC_Curve.class, curveName);
+                    ECParameterSpec spec = curve.toSpec();
+                    return generate(params, random, spec);
+            }
+            return null;
+        }
+
+        native KeyPair generate(AlgorithmParameterSpec params, SecureRandom random, AlgorithmParameterSpec spec);
+    }
 }