Integrate Sign.Verification and Improve Error Handling of Pipeline

- Ensure proper communication of errors between pipeline and mzs
  service by converting MoaZSExceptions into DeliveryRequestStatus
  messages.
- Revise MoaZSException: Add optional fields; those fields are a)
  helpful to construct meaningful error messages and b) optional
  because, depending on where an exception appears, either existent or
  non-existent and thus optional. Add inner-class Builder.
- Integrate Signature Verification into pipeline and add Stub for
  SignatureVerification.
- Move TNVZResponse's Mimetype check into dedicated class (Reason:
  separate abstration layers).
- Update api changes in testcases.

12 files changed, 308 insertions, 77 deletions

diff --git a/src/main/java/at/gv/egiz/moazs/MoaZSException.java b/src/main/java/at/gv/egiz/moazs/MoaZSException.java
index 11d9b4e..db04241 100644
--- a/src/main/java/at/gv/egiz/moazs/MoaZSException.java
+++ b/src/main/java/at/gv/egiz/moazs/MoaZSException.java
@@ -1,20 +1,129 @@
 package at.gv.egiz.moazs;
 
+import at.gv.zustellung.msg.xsd.DeliveryRequestStatusType;
+import at.gv.zustellung.msg.xsd.DeliveryRequestType;
+import at.gv.zustellung.tnvz.xsd.PersonResultType;
+import org.springframework.lang.Nullable;
+
 public class MoaZSException extends RuntimeException {
-    public MoaZSException(String s, Throwable throwable) {
-        super(s, throwable);
-    }
 
-    public MoaZSException(String s) {
-        super(s);
+    public static final String ERROR_MZS_MIMETYPE_MISSMATCH = "8001";
+    public static final String ERROR_MOASP_SIGNATURE_INVALID = "7001";
+
+    @Nullable
+    private final String errorCode;
+    @Nullable
+    private final PersonResultType tnvzResult;
+    @Nullable
+    private final DeliveryRequestStatusType msgResult;
+    @Nullable
+    private final DeliveryRequestType msgRequest;
+    @Nullable
+    private final at.gv.zustellung.app2mzs.xsd.DeliveryRequestType mzsRequest;
+
+    private MoaZSException(String message, Throwable cause, String errorCode, PersonResultType tnvzResult,
+                           DeliveryRequestStatusType msgResult, DeliveryRequestType msgRequest,
+                           at.gv.zustellung.app2mzs.xsd.DeliveryRequestType mzsRequest) {
+        super(message, cause);
+        this.errorCode = errorCode;
+        this.tnvzResult = tnvzResult;
+        this.msgResult = msgResult;
+        this.msgRequest = msgRequest;
+        this.mzsRequest = mzsRequest;
     }
 
     public static MoaZSException moaZSException(String formatString, Object... objects) {
-        return new MoaZSException(String.format(formatString, objects));
+        return moaZSExceptionBuilder(formatString, objects).build();
     }
 
     public static MoaZSException moaZSException(String message) {
-        return new MoaZSException(String.format(message));
+        return moaZSExceptionBuilder(message).build();
+    }
+
+    public static Builder moaZSExceptionBuilder(String formatString, Object... objects) {
+        return new Builder().withMessage(String.format(formatString, objects));
+    }
+
+    public static Builder moaZSExceptionBuilder(String message) {
+        return new Builder().withMessage(message);
+    }
+
+    @Nullable
+    public String getErrorCode() {
+        return errorCode;
+    }
+
+    @Nullable
+    public PersonResultType getTnvzResult() {
+        return tnvzResult;
+    }
+
+    @Nullable
+    public DeliveryRequestStatusType getMsgResult() {
+        return msgResult;
+    }
+
+    @Nullable
+    public at.gv.zustellung.app2mzs.xsd.DeliveryRequestType getMzsRequest() {
+        return mzsRequest;
+    }
+
+    @Nullable
+    public DeliveryRequestType getMsgRequest() {
+        return msgRequest;
+    }
+
+    public static class Builder extends Throwable {
+
+        private String message;
+        private Throwable cause;
+        private String errorCode;
+        private PersonResultType tnvzResult;
+        private DeliveryRequestStatusType msgResult;
+        private DeliveryRequestType msgRequest;
+        private at.gv.zustellung.app2mzs.xsd.DeliveryRequestType mzsRequest;
+
+        private Builder() {
+        }
+
+        public Builder withMessage(String message) {
+            this.message = message;
+            return this;
+        }
+
+        public Builder withCause(Throwable cause) {
+            this.cause = cause;
+            return this;
+        }
+
+        public Builder withErrorCode(String errorCode) {
+            this.errorCode = errorCode;
+            return this;
+        }
+
+        public Builder withTnvzResult(PersonResultType tnvzResult) {
+            this.tnvzResult = tnvzResult;
+            return this;
+        }
+
+        public Builder withMsgResult(DeliveryRequestStatusType msgResult) {
+            this.msgResult = msgResult;
+            return this;
+        }
+
+        public Builder withMsgRequest(DeliveryRequestType msgRequest) {
+            this.msgRequest = msgRequest;
+            return this;
+        }
+
+        public Builder withMzsRequest(at.gv.zustellung.app2mzs.xsd.DeliveryRequestType mzsRequest) {
+            this.mzsRequest = mzsRequest;
+            return this;
+        }
+
+        public MoaZSException build() {
+            return new MoaZSException(message, cause, errorCode, tnvzResult, msgResult, msgRequest, mzsRequest);
+        }
     }
 
 }
diff --git a/src/main/java/at/gv/egiz/moazs/msg/MsgClient.java b/src/main/java/at/gv/egiz/moazs/msg/MsgClient.java
index fd36a92..82f172d 100644
--- a/src/main/java/at/gv/egiz/moazs/msg/MsgClient.java
+++ b/src/main/java/at/gv/egiz/moazs/msg/MsgClient.java
@@ -8,18 +8,14 @@ import org.apache.cxf.jaxws.JaxWsClientFactoryBean;
 import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;
 import org.apache.cxf.message.Message;
 import org.apache.cxf.phase.PhaseInterceptor;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 public class MsgClient {
 
-    private static final Logger log = LoggerFactory.getLogger(MsgClient.class);
-
     private final DeliveryRequestType msgRequest;
     private final ConfigType config;
     private final PhaseInterceptor<? extends Message> interceptor;
 
-    MsgClient(DeliveryRequestType msgRequest, ConfigType config, PhaseInterceptor<? extends Message> interceptor) {
+    public MsgClient(DeliveryRequestType msgRequest, ConfigType config, PhaseInterceptor<? extends Message> interceptor) {
         this.msgRequest = msgRequest;
         this.config = config;
         this.interceptor = interceptor;
diff --git a/src/main/java/at/gv/egiz/moazs/msg/MsgClientFactory.java b/src/main/java/at/gv/egiz/moazs/msg/MsgClientFactory.java
index 82468bc..228ebec 100644
--- a/src/main/java/at/gv/egiz/moazs/msg/MsgClientFactory.java
+++ b/src/main/java/at/gv/egiz/moazs/msg/MsgClientFactory.java
@@ -8,14 +8,7 @@ import org.springframework.stereotype.Component;
 @Component
 public class MsgClientFactory {
 
-    private final StoreSOAPBodyBinaryInRepositoryInterceptor storeResponseInterceptor;
-
-    @Autowired
-    public MsgClientFactory(StoreSOAPBodyBinaryInRepositoryInterceptor storeResponseInterceptor) {
-        this.storeResponseInterceptor = storeResponseInterceptor;
-    }
-
-    public MsgClient create(DeliveryRequestType msgRequest, ConfigType config) {
+    public MsgClient create(DeliveryRequestType msgRequest, ConfigType config, StoreSOAPBodyBinaryInRepositoryInterceptor storeResponseInterceptor) {
         return new MsgClient(msgRequest, config, storeResponseInterceptor);
     }
 
diff --git a/src/main/java/at/gv/egiz/moazs/msg/SignatureVerifier.java b/src/main/java/at/gv/egiz/moazs/msg/SignatureVerifier.java
new file mode 100644
index 0000000..12b1ccb
--- /dev/null
+++ b/src/main/java/at/gv/egiz/moazs/msg/SignatureVerifier.java
@@ -0,0 +1,13 @@
+package at.gv.egiz.moazs.msg;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class SignatureVerifier {
+
+    public boolean verify(byte[] signedXMLdocument) {
+        return true;
+
+    }
+
+}
diff --git a/src/main/java/at/gv/egiz/moazs/msg/StoreSOAPBodyBinaryInRepositoryInterceptor.java b/src/main/java/at/gv/egiz/moazs/msg/StoreSOAPBodyBinaryInRepositoryInterceptor.java
index 4e023ac..c78c44b 100644
--- a/src/main/java/at/gv/egiz/moazs/msg/StoreSOAPBodyBinaryInRepositoryInterceptor.java
+++ b/src/main/java/at/gv/egiz/moazs/msg/StoreSOAPBodyBinaryInRepositoryInterceptor.java
@@ -1,6 +1,5 @@
 package at.gv.egiz.moazs.msg;
 
-import at.gv.egiz.moazs.MoaZSException;
 import at.gv.egiz.moazs.repository.DeliveryRepository;
 import at.gv.egiz.moazs.scheme.SOAPUtils;
 import at.gv.egiz.moazs.util.CXFMessageUtils;
@@ -17,6 +16,8 @@ import org.xml.sax.SAXException;
 import javax.xml.parsers.ParserConfigurationException;
 import java.io.IOException;
 
+import static at.gv.egiz.moazs.MoaZSException.moaZSExceptionBuilder;
+
 @Component
 public class StoreSOAPBodyBinaryInRepositoryInterceptor extends AbstractPhaseInterceptor<Message> {
 
@@ -48,7 +49,9 @@ public class StoreSOAPBodyBinaryInRepositoryInterceptor extends AbstractPhaseInt
                 log.info("Store binary DeliveryRequestStatus with AppDeliveryId={}", appDeliveryId);
             }
         } catch (ParserConfigurationException | SAXException | IOException | NullPointerException e) {
-            throw new MoaZSException("Could not extract signed data from message.", e);
+            throw moaZSExceptionBuilder("Could not extract signed data from message.")
+                    .withCause(e)
+                    .build();
         }
     }
 
diff --git a/src/main/java/at/gv/egiz/moazs/mzs/MzsService.java b/src/main/java/at/gv/egiz/moazs/mzs/MzsService.java
index bb927ba..928e3d7 100644
--- a/src/main/java/at/gv/egiz/moazs/mzs/MzsService.java
+++ b/src/main/java/at/gv/egiz/moazs/mzs/MzsService.java
@@ -20,6 +20,7 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 
 import static at.gv.egiz.moazs.MoaZSException.moaZSException;
+import static at.gv.egiz.moazs.MoaZSException.moaZSExceptionBuilder;
 import static at.gv.zustellung.app2mzs.xsd.PartialSuccessType.partialSuccessTypeBuilder;
 import static java.lang.String.format;
 import static java.util.concurrent.CompletableFuture.supplyAsync;
@@ -70,10 +71,11 @@ public class MzsService implements App2MzsPortType {
             future.thenAccept(appClient::sendNotification);
             return generatePartialSuccessResponse(appDeliveryID);
 
-        } catch (Exception e ) {
-            var message = format("An error occurred while processing DeliveryRequest with AppDeliveryID=%s.", appDeliveryID);
-            throw new MoaZSException(message, e);
-
+        } catch (Exception e) {
+            throw moaZSExceptionBuilder("An error occurred while processing DeliveryRequest " +
+                    "with AppDeliveryID=%s.", appDeliveryID)
+                    .withCause(e)
+                    .build();
         }
 
     }
diff --git a/src/main/java/at/gv/egiz/moazs/pipeline/DeliveryPipeline.java b/src/main/java/at/gv/egiz/moazs/pipeline/DeliveryPipeline.java
index f3ac0e6..f32dfe2 100644
--- a/src/main/java/at/gv/egiz/moazs/pipeline/DeliveryPipeline.java
+++ b/src/main/java/at/gv/egiz/moazs/pipeline/DeliveryPipeline.java
@@ -4,12 +4,12 @@ package at.gv.egiz.moazs.pipeline;
 public interface DeliveryPipeline {
 
     /**
-     * Performs a {@code DeliveryRequest}'s Back-End Tasks
+     * Performs all {@code DeliveryRequest}'s Back-End Tasks.
      *
      * Fetches {@code DeliveryRequest} referred by appDeliveryId from
      * {@code DeliveryRepository}, makes sure that all necessary
-     * tasks are executed and stores the response back to
-     * {@code DeliveryRepository}.
+     * tasks (query tnvz, query msg, verify status) are executed and
+     * stores the response back to {@code DeliveryRepository}.
      * @param appDeliveryId
      */
     void processRequest(String appDeliveryId);
diff --git a/src/main/java/at/gv/egiz/moazs/pipeline/SameThreadDeliveryPipeline.java b/src/main/java/at/gv/egiz/moazs/pipeline/SameThreadDeliveryPipeline.java
index a0475fd..130e147 100644
--- a/src/main/java/at/gv/egiz/moazs/pipeline/SameThreadDeliveryPipeline.java
+++ b/src/main/java/at/gv/egiz/moazs/pipeline/SameThreadDeliveryPipeline.java
@@ -1,24 +1,28 @@
 package at.gv.egiz.moazs.pipeline;
 
 
+import at.gv.egiz.moazs.MoaZSException;
 import at.gv.egiz.moazs.msg.MsgClientFactory;
+import at.gv.egiz.moazs.msg.SignatureVerifier;
+import at.gv.egiz.moazs.msg.StoreSOAPBodyBinaryInRepositoryInterceptor;
 import at.gv.egiz.moazs.repository.DeliveryRepository;
 import at.gv.egiz.moazs.scheme.Mzs2MsgConverter;
+import at.gv.egiz.moazs.scheme.NameSpace;
 import at.gv.egiz.moazs.tnvz.TnvzClient;
+import at.gv.egiz.moazs.tnvz.TnvzResultVerifier;
 import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType;
-import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType.Payload;
-import at.gv.zustellung.msg.xsd.persondata.IdentificationType;
+import at.gv.zustellung.msg.xsd.DeliveryAnswerType;
+import at.gv.zustellung.msg.xsd.DeliveryRequestStatusType;
 import at.gv.zustellung.tnvz.xsd.PersonResultType;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Profile;
 import org.springframework.stereotype.Component;
 
-import java.util.Collection;
-import java.util.List;
-
-import static at.gv.egiz.moazs.MoaZSException.moaZSException;
-import static java.lang.String.join;
-import static java.util.stream.Collectors.toSet;
+import static at.gv.egiz.moazs.MoaZSException.moaZSExceptionBuilder;
+import static at.gv.egiz.moazs.util.NullCoalesce.coalesce;
+import static at.gv.zustellung.msg.xsd.DeliveryRequestStatusType.Error.errorBuilder;
+import static at.gv.zustellung.msg.xsd.DeliveryRequestStatusType.deliveryRequestStatusTypeBuilder;
+import static at.gv.zustellung.msg.xsd.ErrorInfoType.errorInfoTypeBuilder;
 
 @Component
 @Profile("!cluster")
@@ -26,74 +30,109 @@ public class SameThreadDeliveryPipeline implements DeliveryPipeline {
 
     private final DeliveryRepository repository;
     private final TnvzClient tnvzClient;
+    private final TnvzResultVerifier tnvzVerifier;
     private final Mzs2MsgConverter converter;
     private final MsgClientFactory msgClientFactory;
+    private final SignatureVerifier verifier;
+    private final StoreSOAPBodyBinaryInRepositoryInterceptor interceptor;
 
     @Autowired
     public SameThreadDeliveryPipeline(DeliveryRepository repository,
                                       TnvzClient tnvzClient,
+                                      TnvzResultVerifier tnvzVerifier,
                                       Mzs2MsgConverter converter,
-                                      MsgClientFactory msgClientFactory) {
+                                      StoreSOAPBodyBinaryInRepositoryInterceptor interceptor,
+                                      MsgClientFactory msgClientFactory,
+                                      SignatureVerifier verifier
+    ) {
         this.repository = repository;
         this.tnvzClient = tnvzClient;
+        this.tnvzVerifier = tnvzVerifier;
         this.converter = converter;
         this.msgClientFactory = msgClientFactory;
+        this.verifier = verifier;
+        this.interceptor = interceptor;
     }
 
     @Override
     public void processRequest(String appDeliveryId) {
 
-        var mzsRequest = repository.getDeliveryRequest(appDeliveryId).orElseThrow();
-        var msgRequest = (mzsRequest.getConfig().isPerformQueryPersonRequest())
-                ? converter.convert(mzsRequest, queryPerson(mzsRequest))
-                : converter.convert(mzsRequest);
+        DeliveryRequestType mzsRequest;
+        PersonResultType tnvzResult = null;
+        at.gv.zustellung.msg.xsd.DeliveryRequestType msgRequest;
+        DeliveryRequestStatusType status;
+
+        try {
+            mzsRequest = repository.getDeliveryRequest(appDeliveryId).orElseThrow();
+
+            if (mzsRequest.getConfig().isPerformQueryPersonRequest()) {
+                tnvzResult = performTnvzQuery(mzsRequest);
+                msgRequest = converter.convert(mzsRequest, tnvzResult.getSuccess().getIdentification());
+            } else {
+                msgRequest = converter.convert(mzsRequest);
+            }
+
+            status = msgClientFactory.create(msgRequest, mzsRequest.getConfig(), interceptor).send();
+
+            var signedStatus = repository.getSignedDeliveryRequestStatus(appDeliveryId).get();
+            if (verifier.verify(signedStatus)) {
+                repository.add(status);
+            } else {
+                throw moaZSExceptionBuilder("Signature of DeliveryRequestStatus with AppDeliveryId={} " +
+                        "is invalid.", appDeliveryId)
+                        .withErrorCode(MoaZSException.ERROR_MOASP_SIGNATURE_INVALID)
+                        .withMzsRequest(mzsRequest)
+                        .withTnvzResult(tnvzResult)
+                        .withMsgRequest(msgRequest)
+                        .withMsgResult(status)
+                        .build();
+            }
+        } catch (MoaZSException exception) {
+            var errorStatus = generateErrorStatus(exception, appDeliveryId);
+            repository.add(errorStatus);
+        }
+    }
 
-        var msgClient = msgClientFactory.create(msgRequest, mzsRequest.getConfig());
-        var status = msgClient.send();
-        repository.add(status);
+    private PersonResultType performTnvzQuery(DeliveryRequestType request) {
+        var result =  tnvzClient.query(request.getSender(), request.getReceiver());
+        tnvzVerifier.verify(request, result);
+        return result;
     }
 
-    private IdentificationType queryPerson(DeliveryRequestType request) {
-        var result = tnvzClient.queryPerson(request.getSender(), request.getReceiver());
+    private DeliveryRequestStatusType generateErrorStatus(MoaZSException exception, String appDeliveryId) {
 
-        if (result.getError() != null) {
-            var error = result.getError();
-            var info = error.getErrorInfo();
-            var noteSent = (error.getPreAdviceNoteSent() != null) ? "sent" : "not sent";
-            var template = "Receiver is not addressable. Code: %s ; Text: %s; Preadvice note was %s.";
-            throw moaZSException(template, info.getCode(), info.getText(), noteSent);
-        }
+        var infoBuilder = errorInfoTypeBuilder()
+                .withText(exception.getMessage())
+                .withCode(exception.getErrorCode());
 
-        var mismatchedTypes = findMimeTypeMismatches(result, request);
+        var errorBuilder = errorBuilder()
+                .withErrorInfo(infoBuilder.build())
+                .withAppDeliveryID(appDeliveryId);
 
-        if (!mismatchedTypes.isEmpty()) {
-            var template = "Request contains attachment of type(s) %s, but receiver only accepts attachments of type(s) %s.";
-            var acceptedTypesString = join(",", getAcceptedTypes(result));
-            var mismatchedTypesString = join(",", mismatchedTypes);
-            throw moaZSException(template, mismatchedTypesString, acceptedTypesString);
+        if (exception.getMzsRequest() != null) {
+            errorBuilder.withDeliverySystem(exception.getMzsRequest().getConfig().getServer().getZUSEUrlID());
         }
 
-        return result.getSuccess().getIdentification();
-    }
-
-    private Collection<String> findMimeTypeMismatches(PersonResultType result, DeliveryRequestType request) {
-        var acceptedTypes = getAcceptedTypes(result);
-
-        if (acceptedTypes.contains("*/*")) {
-            return List.of();
+        if (exception.getTnvzResult() != null && exception.getTnvzResult().getError() != null) {
+            errorBuilder.withPreAdviceNoteSent(exception.getTnvzResult().getError().getPreAdviceNoteSent());
         }
 
-        var typesInRequest = request.getPayload().stream()
-                .map(Payload::getMIMEType)
-                .collect(toSet());
+        if (exception.getMsgResult() != null) {
+            var answer = getAnswerFromResult(exception.getMsgResult());
+            errorBuilder.withGZ(answer.getGZ());
+            errorBuilder.withZSDeliveryID(answer.getZSDeliveryID());
+        }
 
-        typesInRequest.removeAll(acceptedTypes);
+        return deliveryRequestStatusTypeBuilder()
+                .withError(errorBuilder.build())
+                .withVersion(NameSpace.MSG_VERSION)
+                .build();
 
-        return typesInRequest;
     }
 
-    private List<String> getAcceptedTypes(PersonResultType result) {
-        return result.getSuccess().getMimeTypeList().getMimeType();
+    private DeliveryAnswerType getAnswerFromResult(DeliveryRequestStatusType msgResult) {
+        return coalesce(msgResult.getSuccess(), msgResult.getPartialSuccess(), msgResult.getError()).get();
     }
 
+
 }
diff --git a/src/main/java/at/gv/egiz/moazs/scheme/NameSpace.java b/src/main/java/at/gv/egiz/moazs/scheme/NameSpace.java
index 63276cb..fc479eb 100644
--- a/src/main/java/at/gv/egiz/moazs/scheme/NameSpace.java
+++ b/src/main/java/at/gv/egiz/moazs/scheme/NameSpace.java
@@ -5,6 +5,7 @@ public class NameSpace {
     private NameSpace() {}
 
     public static final String MSG = new at.gv.zustellung.msg.xsd.ObjectFactory().createDeliveryRequest(null).getName().getNamespaceURI();
+    public static final String MSG_VERSION = "2.2.0";
 
     public static final String MSGP = new at.gv.zustellung.msg.xsd.persondata.ObjectFactory().createPerson(null).getName().getNamespaceURI();
 
diff --git a/src/main/java/at/gv/egiz/moazs/scheme/SOAPUtils.java b/src/main/java/at/gv/egiz/moazs/scheme/SOAPUtils.java
index 2d4df4b..b1c1909 100644
--- a/src/main/java/at/gv/egiz/moazs/scheme/SOAPUtils.java
+++ b/src/main/java/at/gv/egiz/moazs/scheme/SOAPUtils.java
@@ -13,6 +13,8 @@ import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 
+import static at.gv.egiz.moazs.MoaZSException.moaZSExceptionBuilder;
+
 @Component
 public class SOAPUtils {
 
@@ -30,7 +32,7 @@ public class SOAPUtils {
                     .getBytes(StandardCharsets.UTF_8);
 
         } catch (IOException | TransformerException e) {
-            throw new MoaZSException("Error while parsing message. ", e);
+            throw moaZSExceptionBuilder("Error while parsing message. ").withCause(e).build();
         }
     }
 
diff --git a/src/main/java/at/gv/egiz/moazs/tnvz/TnvzClient.java b/src/main/java/at/gv/egiz/moazs/tnvz/TnvzClient.java
index 4a69aea..d4049fc 100644
--- a/src/main/java/at/gv/egiz/moazs/tnvz/TnvzClient.java
+++ b/src/main/java/at/gv/egiz/moazs/tnvz/TnvzClient.java
@@ -1,5 +1,7 @@
 package at.gv.egiz.moazs.tnvz;
 
+import at.gv.egiz.moazs.MoaZSException;
+import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType;
 import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType.Sender;
 import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType.Receiver;
 import at.gv.zustellung.tnvz.xsd.PersonResultSuccessType;
@@ -7,10 +9,18 @@ import at.gv.zustellung.tnvz.xsd.PersonResultType;
 import at.gv.zustellung.tnvz.xsd.PersonResultType.PersonResultTypeBuilder;
 import org.springframework.stereotype.Component;
 
+import java.util.Collection;
+import java.util.List;
+
+import static at.gv.egiz.moazs.MoaZSException.moaZSExceptionBuilder;
+import static java.lang.String.join;
+import static java.util.stream.Collectors.toSet;
+
 @Component
 public class TnvzClient {
 
-    public PersonResultType queryPerson(Sender sender, Receiver receiver) {
+    public PersonResultType query(Sender sender, Receiver receiver) {
+        //TODO: Replace this stub with actual request.
         PersonResultSuccessType success = new PersonResultSuccessType.PersonResultSuccessTypeBuilder().build();
         return new PersonResultTypeBuilder().withSuccess(success).build();
     }
diff --git a/src/main/java/at/gv/egiz/moazs/tnvz/TnvzResultVerifier.java b/src/main/java/at/gv/egiz/moazs/tnvz/TnvzResultVerifier.java
new file mode 100644
index 0000000..9992246
--- /dev/null
+++ b/src/main/java/at/gv/egiz/moazs/tnvz/TnvzResultVerifier.java
@@ -0,0 +1,63 @@
+package at.gv.egiz.moazs.tnvz;
+
+import at.gv.egiz.moazs.MoaZSException;
+import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType;
+import at.gv.zustellung.tnvz.xsd.PersonResultType;
+import org.springframework.stereotype.Component;
+
+import java.util.Collection;
+import java.util.List;
+
+import static at.gv.egiz.moazs.MoaZSException.moaZSExceptionBuilder;
+import static java.lang.String.join;
+import static java.util.stream.Collectors.toSet;
+
+@Component
+public class TnvzResultVerifier {
+
+    public void verify(DeliveryRequestType request, PersonResultType result) {
+
+        if (result.getError() != null) {
+            var info = result.getError().getErrorInfo();
+            throw moaZSExceptionBuilder("Receiver is not addressable. Reason: %s", info.getText())
+                    .withErrorCode(info.getCode())
+                    .withMzsRequest(request)
+                    .withTnvzResult(result)
+                    .build();
+        }
+
+        var mismatchedTypes = findMimeTypeMismatches(result, request);
+
+        if (!mismatchedTypes.isEmpty()) {
+            var template = "Request contains attachment of type(s) %s, but receiver only accepts attachments" +
+                    " of type(s) %s.";
+            var acceptedTypesString = join(",", getAcceptedTypes(result));
+            var mismatchedTypesString = join(",", mismatchedTypes);
+            throw moaZSExceptionBuilder(template, mismatchedTypesString, acceptedTypesString)
+                    .withErrorCode(MoaZSException.ERROR_MZS_MIMETYPE_MISSMATCH)
+                    .withMzsRequest(request)
+                    .withTnvzResult(result)
+                    .build();
+        }
+    }
+
+    private Collection<String> findMimeTypeMismatches(PersonResultType result, DeliveryRequestType request) {
+        var acceptedTypes = getAcceptedTypes(result);
+
+        if (acceptedTypes.contains("*/*")) {
+            return List.of();
+        }
+
+        var typesInRequest = request.getPayload().stream()
+                .map(DeliveryRequestType.Payload::getMIMEType)
+                .collect(toSet());
+
+        typesInRequest.removeAll(acceptedTypes);
+
+        return typesInRequest;
+    }
+
+    private List<String> getAcceptedTypes(PersonResultType result) {
+        return result.getSuccess().getMimeTypeList().getMimeType();
+    }
+}