Refactoring test certificate handling.

contrib/platform/test/com/sun/jna/platform/win32/Crypt32Test.java

@@ -37,10 +37,36 @@
  * @author dblock[at]dblock[dot]org
  */
 public class Crypt32Test extends TestCase {
+
+	/**
+	* Track if the test certificate was created during the test.
+	*/
+	private boolean createdCertificate = false;
 
     public static void main(String[] args) {
         junit.textui.TestRunner.run(Crypt32Test.class);
     }
+
+    protected void setUp() {
+		HCERTSTORE hCertStore = Crypt32.INSTANCE.CertOpenSystemStore(Pointer.NULL, "MY");
+		WString myString = new WString("cryptsigntest");
+		Pointer pvFindPara = new Memory((myString.length() + 1) * 2);
+		pvFindPara.setString(0, myString);
+
+		CERT_CONTEXT.ByReference pc = Crypt32.INSTANCE.CertFindCertificateInStore(hCertStore,
+				(WinCrypt.PKCS_7_ASN_ENCODING | WinCrypt.X509_ASN_ENCODING), 0, WinCrypt.CERT_FIND_SUBJECT_STR,
+				pvFindPara, null);
+
+		if (pc == null) {
+			createdCertificate = createTestCertificate();
+		}
+    }
+
+    protected void tearDown() {
+    	if(createdCertificate) {
+    		removeTestCertificate();
+    	}
+    }
 
     public void testCryptProtectUnprotectData() {
     	DATA_BLOB pDataIn = new DATA_BLOB("hello world");
@@ -271,4 +297,17 @@ private boolean createTestCertificate() {
 
 		return true;
 	}
+
+	private boolean removeTestCertificate() {
+		try {
+			KeyStore keyStore = KeyStore.getInstance("Windows-MY", "SunMSCAPI");
+			keyStore.load(null, null);
+			keyStore.deleteEntry("cryptsigntest");
+		} catch (Exception e) {
+			System.out.println("Test certificate deletion failed.");
+			return false;
+		}
+
+		return true;
+	}
 }