Refactor JUnit 5 Tests for BaseTestDSASignatureInterop

Replace multiple test classes extending BaseTestDSASignatureInterop with a single JUnit 5 parameterized test class

Signed-off-by: Mohit Rajbhar <mohit.rajbhar@ibm.com>

Author: Mohit-Rajbhar100698

src/test/java/ibm/jceplus/junit/TestMultithread.java

@@ -35,7 +35,6 @@ public class TestMultithread {
             "ibm.jceplus.junit.openjceplus.multithread.TestAliases",
             "ibm.jceplus.junit.openjceplus.multithread.TestDH",
             "ibm.jceplus.junit.openjceplus.multithread.TestDSAKey",
-            "ibm.jceplus.junit.openjceplus.multithread.TestDSASignatureInteropSUN",
             "ibm.jceplus.junit.openjceplus.multithread.TestECDH",
             "ibm.jceplus.junit.openjceplus.multithread.TestECDHInteropSunEC",
             "ibm.jceplus.junit.openjceplus.multithread.TestEdDSASignature",

src/test/java/ibm/jceplus/junit/TestMultithreadFIPS.java

@@ -35,7 +35,6 @@ public class TestMultithreadFIPS {
             "ibm.jceplus.junit.openjceplusfips.multithread.TestAliases",
             "ibm.jceplus.junit.openjceplusfips.multithread.TestDH",
             "ibm.jceplus.junit.openjceplusfips.multithread.TestDSAKey",
-            "ibm.jceplus.junit.openjceplusfips.multithread.TestDSASignatureInteropSUN",
             "ibm.jceplus.junit.openjceplusfips.multithread.TestECDH",
             "ibm.jceplus.junit.openjceplusfips.multithread.TestECDHInteropSunEC",
             "ibm.jceplus.junit.openjceplusfips.multithread.TestHKDF",

src/test/java/ibm/jceplus/junit/openjceplus/TestAll.java

@@ -39,7 +39,6 @@
     TestDSAKey.class,
     TestDSASignature.class,
     TestDSASignatureInteropBC.class,
-    TestDSASignatureInteropSUN.class,
     TestECDH.class,
     TestECDHInteropBC.class,
     TestECDHInteropSunEC.class,

src/test/java/ibm/jceplus/junit/openjceplus/TestDSASignatureInteropSUN.java

@@ -1,5 +1,5 @@
 /*
- * Copyright IBM Corp. 2025
+ * Copyright IBM Corp. 2025, 2026
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms provided by IBM in the LICENSE file that accompanied
@@ -29,6 +29,14 @@ public void setProviderName(String providerName) {
 
     public void setAndInsertProvider(TestProvider provider) throws Exception {
         this.providerName = provider.getProviderName();
+        loadSupportedProvider(provider);
+    }
+
+    public void setAndInsertInteropProvider(TestProvider interopProvider) throws Exception {
+        loadSupportedProvider(interopProvider);
+    }
+
+    private void loadSupportedProvider(TestProvider provider) throws Exception {
         switch (provider) {
             case BC:
                 loadProvider(TestProvider.BC);

src/test/java/ibm/jceplus/junit/openjceplus/multithread/TestDSASignatureInteropSUN.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright IBM Corp. 2023, 2026
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms provided by IBM in the LICENSE file that accompanied
+ * this code, including the "Classpath" Exception described therein.
+ */
+
+package ibm.jceplus.junit.tests;
+
+public class BaseTestInterop extends BaseTest {
+
+    public String interopProviderName;
+    public String interopProviderName2;
+
+    /**
+     * Sets the provider name to interop with.
+     *
+     * @param providerName the provider name associated with this test case for use.
+     */
+    public void setInteropProviderName(String providerName) {
+        this.interopProviderName = providerName;
+    }
+
+    /**
+     * Gets the provider name that is to be used for interop.
+     *
+     * @return The provider name associated with the interop provider name.
+     */
+    public String getInteropProviderName() {
+        return this.interopProviderName;
+    }
+
+    /**
+     * Sets the provider name to interop with.
+     *
+     * @param providerName the provider name associated with this test case for use.
+     */
+    public void setInteropProviderName2(String providerName) {
+        this.interopProviderName2 = providerName;
+    }
+
+    /**
+     * Gets the provider name that is to be used for interop.
+     *
+     * @return The provider name associated with the interop provider name.
+     */
+    public String getInteropProviderName2() {
+        return this.interopProviderName2;
+    }
+}

src/test/java/ibm/jceplus/junit/openjceplusfips/TestDSASignatureInteropSUN.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright IBM Corp. 2023, 2026
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms provided by IBM in the LICENSE file that accompanied
+ * this code, including the "Classpath" Exception described therein.
+ */
+
+package ibm.jceplus.junit.tests;
+
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.Signature;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class BaseTestSignatureInterop extends BaseTestInterop {
+
+    protected void doSignVerify(String sigAlgo, byte[] message, PrivateKey privateKey,
+            PublicKey publicKey) throws Exception {
+        doSignVerify(sigAlgo, message, privateKey, publicKey, getProviderName(), getInteropProviderName());
+        doSignVerify(sigAlgo, message, privateKey, publicKey, getInteropProviderName(), getProviderName());
+    }
+
+
+    protected static void doSignVerify(String sigAlgo, byte[] message, PrivateKey privateKey,
+            PublicKey publicKey, String signProvider, String verifyProvider) throws Exception {
+        Signature signing = Signature.getInstance(sigAlgo, signProvider);
+        signing.initSign(privateKey);
+        signing.update(message);
+        byte[] signedBytes = signing.sign();
+
+        Signature verifying = Signature.getInstance(sigAlgo, verifyProvider);
+        verifying.initVerify(publicKey);
+        verifying.update(message);
+
+        assertTrue(verifying.verify(signedBytes), "Signature verification failed");
+    }
+}
+