Code cleanup

- Remove unused code
- Fix deprecated warnings

acme4j-smime/src/main/java/org/shredzone/acme4j/smime/email/EmailProcessor.java

@@ -21,14 +21,12 @@ import java.security.KeyStore;
 import java.security.KeyStoreException;
 import java.security.cert.PKIXParameters;
 import java.security.cert.X509Certificate;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import edu.umd.cs.findbugs.annotations.CheckForNull;
 import edu.umd.cs.findbugs.annotations.Nullable;
 import jakarta.mail.Message;
 import jakarta.mail.MessagingException;
@@ -353,85 +351,6 @@ public final class EmailProcessor {
         return new ResponseGenerator(this);
     }
 
-    /**
-     * Get an optional property from the message.
-     * <p>
-     * Optional property means: If there is a signed message, try to fetch the property
-     * from there. If the property is not present, fetch it from the unsigned message
-     * instead. If it's also not there, return {@code null}.
-     *
-     * @param getter
-     *         The getter method of {@link Message} to be invoked
-     * @param message
-     *         The outer (unsigned) {@link Message} that serves as fallback
-     * @param signedMessage
-     *         The signed (inner) {@link Message} where the property is looked up first
-     * @param <T>
-     *         The expected result type
-     * @return The mail property, or {@code null} if not found
-     */
-    @CheckForNull
-    private <T> T getOptional(MessageFunction<Message, T> getter, Message message, @Nullable Message signedMessage)
-            throws MessagingException {
-        if (signedMessage != null) {
-            T result = getter.apply(signedMessage);
-            if (result != null) {
-                return result;
-            }
-        }
-        return getter.apply(message);
-    }
-
-    /**
-     * Get a mandatory property from the message.
-     * <p>
-     * Mandatory means: If there is a signed message, the property <em>must</em> be
-     * present there. The unsigned message is only queried as fallback if there is no
-     * signed message at all.
-     *
-     * @param getter
-     *         The getter method of {@link Message} to be invoked
-     * @param message
-     *         The outer (unsigned) {@link Message} that serves as fallback if there is
-     *         no signed message.
-     * @param signedMessage
-     *         The signed (inner) {@link Message} where the property is expected, or
-     *         {@code null} if there is no signed message.
-     * @param header
-     *         Name of the expected header
-     * @param <T>
-     *         The expected result type
-     * @return The mail property, or {@code null} if not found
-     */
-    @CheckForNull
-    private <T> T getMandatory(MessageFunction<Message, T> getter, Message message, @Nullable Message signedMessage, String header)
-            throws MessagingException, AcmeInvalidMessageException {
-        if (signedMessage != null) {
-            T value = getter.apply(signedMessage);
-            if (value == null) {
-                throw new AcmeInvalidMessageException("Protected header '" + header + "' expected, but missing.");
-            }
-            return value;
-        }
-        return getter.apply(message);
-    }
-
-    /**
-     * Checks if this message is "auto-generated".
-     *
-     * @param autoSubmitted
-     *         Auto-Submitted header content
-     * @return {@code true} if the mail was auto-generated.
-     */
-    private boolean isAutoGenerated(@Nullable String[] autoSubmitted) throws MessagingException {
-        if (autoSubmitted == null || autoSubmitted.length == 0) {
-            return false;
-        }
-        return Arrays.stream(autoSubmitted)
-                .map(String::trim)
-                .anyMatch(h -> h.startsWith("auto-generated"));
-    }
-
     /**
      * Checks if a challenge has been set. Throws an exception if not.
      */
@@ -441,12 +360,6 @@ public final class EmailProcessor {
         }
     }
 
-    @FunctionalInterface
-    private interface MessageFunction<M extends Message, R> {
-        @CheckForNull
-        R apply(M message) throws MessagingException;
-    }
-
     /**
      * A builder for {@link EmailProcessor}.
      * <p>
@@ -456,7 +369,7 @@ public final class EmailProcessor {
      */
     public static class Builder {
         private boolean unsigned = false;
-        private SignedMailBuilder builder = new SignedMailBuilder();
+        private final SignedMailBuilder builder = new SignedMailBuilder();
 
         private Builder() {
             // Private constructor

acme4j-smime/src/main/java/org/shredzone/acme4j/smime/email/ResponseGenerator.java

@@ -93,7 +93,7 @@ public class ResponseGenerator {
      * Sets a {@link ResponseBodyGenerator} that is used for generating a response body.
      * <p>
      * Use this generator to individually style the email body, for example to use a
-     * multipart body. However be aware that the response mail is evaluated by a machine,
+     * multipart body. However, be aware that the response mail is evaluated by a machine,
      * and usually not read by humans, so the body should be designed as simple as
      * possible.
      * <p>

acme4j-smime/src/test/java/org/shredzone/acme4j/smime/csr/SMIMECSRBuilderTest.java

@@ -30,9 +30,9 @@ import jakarta.mail.internet.AddressException;
 import jakarta.mail.internet.InternetAddress;
 import org.assertj.core.api.AutoCloseableSoftAssertions;
 import org.bouncycastle.asn1.ASN1Encodable;
+import org.bouncycastle.asn1.ASN1IA5String;
 import org.bouncycastle.asn1.ASN1ObjectIdentifier;
 import org.bouncycastle.asn1.DERBitString;
-import org.bouncycastle.asn1.DERIA5String;
 import org.bouncycastle.asn1.pkcs.Attribute;
 import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
 import org.bouncycastle.asn1.x500.X500Name;
@@ -55,14 +55,12 @@ import org.shredzone.acme4j.util.KeyPairUtils;
 public class SMIMECSRBuilderTest {
 
     private static KeyPair testKey;
-    private static KeyPair testEcKey;
 
     @BeforeAll
     public static void setup() {
         Security.addProvider(new BouncyCastleProvider());
 
         testKey = KeyPairUtils.createKeyPair(512);
-        testEcKey = KeyPairUtils.createECKeyPair("secp256r1");
     }
 
     /**
@@ -160,21 +158,21 @@ public class SMIMECSRBuilderTest {
         assertThat(builder.toString()).isEqualTo(",TYPE=SIGNING_AND_ENCRYPTION");
 
         assertThatExceptionOfType(NullPointerException.class)
-                .isThrownBy(() -> new SMIMECSRBuilder().addValue((String) null, "value"))
-                .as("addValue(String, String)");
+                .as("addValue(String, String)")
+                .isThrownBy(() -> new SMIMECSRBuilder().addValue((String) null, "value"));
         assertThatExceptionOfType(NullPointerException.class)
-                .isThrownBy(() -> new SMIMECSRBuilder().addValue((ASN1ObjectIdentifier) null, "value"))
-                .as("addValue(ASN1ObjectIdentifier, String)");
+                .as("addValue(ASN1ObjectIdentifier, String)")
+                .isThrownBy(() -> new SMIMECSRBuilder().addValue((ASN1ObjectIdentifier) null, "value"));
         assertThatExceptionOfType(NullPointerException.class)
-                .isThrownBy(() -> new SMIMECSRBuilder().addValue("C", null))
-                .as("addValue(String, null)");
-        assertThatExceptionOfType(IllegalArgumentException.class)
-                .isThrownBy(() -> new SMIMECSRBuilder().addValue("UNKNOWNATT", "val"))
                 .as("addValue(String, null)")
+                .isThrownBy(() -> new SMIMECSRBuilder().addValue("C", null));
+        assertThatExceptionOfType(IllegalArgumentException.class)
+                .as("addValue(String, null)")
+                .isThrownBy(() -> new SMIMECSRBuilder().addValue("UNKNOWNATT", "val"))
                 .withMessage(invAttNameExMessage);
         assertThatExceptionOfType(AddressException.class)
-                .isThrownBy(() -> new SMIMECSRBuilder().addValue("CN", "invalid@example..com"))
-                .as("addValue(String, invalid String)");
+                .as("addValue(String, invalid String)")
+                .isThrownBy(() -> new SMIMECSRBuilder().addValue("CN", "invalid@example..com"));
 
         assertThat(builder.toString()).isEqualTo(",TYPE=SIGNING_AND_ENCRYPTION");
 
@@ -238,7 +236,7 @@ public class SMIMECSRBuilderTest {
         GeneralNames names = GeneralNames.fromExtensions((Extensions) extensions[0], Extension.subjectAlternativeName);
         assertThat(names.getNames())
                 .filteredOn(gn -> gn.getTagNo() == GeneralName.rfc822Name)
-                .extracting(gn -> DERIA5String.getInstance(gn.getName()).getString())
+                .extracting(gn -> ASN1IA5String.getInstance(gn.getName()).getString())
                 .containsExactlyInAnyOrder("mail@example.com", "info@example.com",
                         "sales@example.com", "shop@example.com", "support@example.com",
                         "help@example.com");
@@ -307,7 +305,7 @@ public class SMIMECSRBuilderTest {
      * Make sure an exception is thrown when nothing is set.
      */
     @Test
-    public void testNoEmail() throws IOException {
+    public void testNoEmail() {
         assertThrows(IllegalStateException.class, () -> {
             SMIMECSRBuilder builder = new SMIMECSRBuilder();
             builder.sign(testKey);
@@ -318,7 +316,7 @@ public class SMIMECSRBuilderTest {
      * Make sure all getters will fail if the CSR is not signed.
      */
     @Test
-    public void testNoSign() throws IOException {
+    public void testNoSign() {
         SMIMECSRBuilder builder = new SMIMECSRBuilder();
 
         assertThrows(IllegalStateException.class, builder::getCSR, "getCSR");