More code cleanup and tests

pgpainless-core/src/main/java/org/pgpainless/util/BCUtil.java

@@ -38,10 +38,8 @@ import org.bouncycastle.openpgp.PGPSecretKeyRingCollection;
 import org.bouncycastle.openpgp.PGPSignature;
 import org.bouncycastle.openpgp.PGPSignatureSubpacketVector;
 import org.bouncycastle.openpgp.PGPUtil;
-import org.bouncycastle.openpgp.operator.KeyFingerPrintCalculator;
 import org.bouncycastle.util.io.Streams;
 import org.pgpainless.algorithm.KeyFlag;
-import org.pgpainless.implementation.ImplementationFactory;
 import org.pgpainless.key.selection.key.PublicKeySelectionStrategy;
 import org.pgpainless.key.selection.key.impl.NoRevocation;
 import org.pgpainless.key.selection.key.impl.SignedByMasterKey;
@@ -185,24 +183,6 @@ public class BCUtil {
         return cleaned;
     }
 
-    /**
-     * Return the {@link PGPPublicKey} which is the master key of the key ring.
-     *
-     * @param ring key ring
-     * @return master key
-     */
-    public static PGPPublicKey getMasterKeyFrom(@Nonnull PGPPublicKeyRing ring) {
-        Iterator<PGPPublicKey> it = ring.getPublicKeys();
-        while (it.hasNext()) {
-            PGPPublicKey k = it.next();
-            if (k.isMasterKey()) {
-                // There can only be one master key, so we can immediately return
-                return k;
-            }
-        }
-        return null;
-    }
-
     public static PGPPublicKey getMasterKeyFrom(@Nonnull PGPKeyRing ring) {
         Iterator<PGPPublicKey> it = ring.getPublicKeys();
         while (it.hasNext()) {

pgpainless-core/src/test/java/org/pgpainless/key/info/KeyRingInfoTest.java

@@ -33,6 +33,8 @@ import org.pgpainless.PGPainless;
 import org.pgpainless.algorithm.PublicKeyAlgorithm;
 import org.pgpainless.key.TestKeys;
 import org.pgpainless.key.protection.UnprotectedKeysProtector;
+import org.pgpainless.key.util.KeyRingUtils;
+import org.pgpainless.util.Passphrase;
 
 public class KeyRingInfoTest {
 
@@ -79,4 +81,28 @@ public class KeyRingInfoTest {
         assertEquals(revocationDate.getTime(), rInfo.getRevocationDate().getTime(), 1000);
         assertEquals(revocationDate.getTime(), rInfo.getLastModified().getTime(), 1000);
     }
+
+    @Test
+    public void testIsFullyDecrypted() throws IOException, PGPException {
+        PGPSecretKeyRing secretKeys = TestKeys.getEmilSecretKeyRing();
+        KeyRingInfo info = PGPainless.inspectKeyRing(secretKeys);
+
+        assertTrue(info.isFullyDecrypted());
+
+        secretKeys = PGPainless.modifyKeyRing(secretKeys)
+                .changePassphraseFromOldPassphrase(null)
+                .withSecureDefaultSettings()
+                .toNewPassphrase(Passphrase.fromPassword("sw0rdf1sh"))
+                .done();
+        info = PGPainless.inspectKeyRing(secretKeys);
+
+        assertFalse(info.isFullyDecrypted());
+    }
+
+    @Test
+    public void testGetSecretKey() throws IOException, PGPException {
+        PGPSecretKeyRing secretKeys = TestKeys.getCryptieSecretKeyRing();
+        PGPPublicKeyRing publicKeys = KeyRingUtils.publicKeyRingFrom(secretKeys);
+
+    }
 }

pgpainless-core/src/test/java/org/pgpainless/util/BCUtilTest.java

@@ -36,6 +36,8 @@ import org.bouncycastle.openpgp.PGPSecretKeyRingCollection;
 import org.junit.jupiter.api.Test;
 import org.pgpainless.PGPainless;
 import org.pgpainless.algorithm.KeyFlag;
+import org.pgpainless.key.OpenPgpV4Fingerprint;
+import org.pgpainless.key.TestKeys;
 import org.pgpainless.key.generation.KeySpec;
 import org.pgpainless.key.generation.type.KeyType;
 import org.pgpainless.key.generation.type.rsa.RsaLength;
@@ -133,4 +135,14 @@ public class BCUtilTest {
         PGPSecretKeyRing cleaned = BCUtil.removeUnassociatedKeysFromKeyRing(alice_mallory, alice.getPublicKey());
         assertNull(cleaned.getSecretKey(subKey.getKeyID()));
     }
+
+    @Test
+    public void getMasterKeyFromRingTest() throws IOException, PGPException {
+        PGPSecretKeyRing secretKeys = TestKeys.getCryptieSecretKeyRing();
+
+        PGPPublicKey primaryKey = BCUtil.getMasterKeyFrom(secretKeys);
+
+        assertNotNull(primaryKey);
+        assertEquals(TestKeys.CRYPTIE_FINGERPRINT, new OpenPgpV4Fingerprint(primaryKey));
+    }
 }