Implementation of KeyPair generation

Issue-ID: AAF-996
Change-Id: I97626d122033127d5bb234d134c20d0b5a6d7c03
Signed-off-by: kjaniak <kornel.janiak@nokia.com>

28 files changed, 464 insertions, 100 deletions

diff --git a/certServiceClient/pom.xml b/certServiceClient/pom.xml
index c6a17755..f092990a 100644
--- a/certServiceClient/pom.xml
+++ b/certServiceClient/pom.xml
@@ -58,7 +58,7 @@
                                 <configuration>
                                     <transformers>
                                         <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-                                            <mainClass>org.onap.aaf.certservice.client.CertServiceClientApp</mainClass>
+                                            <mainClass>org.onap.aaf.certservice.client.MainApp</mainClass>
                                         </transformer>
                                     </transformers>
                                 </configuration>
@@ -131,12 +131,12 @@
 
     <dependencies>
         <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
+            <groupId>org.bouncycastle</groupId>
+            <artifactId>bcpkix-jdk15on</artifactId>
         </dependency>
         <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-api</artifactId>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
         </dependency>
         <dependency>
             <groupId>org.junit.jupiter</groupId>
@@ -155,6 +155,10 @@
             <artifactId>mockito-junit-jupiter</artifactId>
         </dependency>
         <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
+        <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-log4j2</artifactId>
         </dependency>
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/AppExitHandler.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/AppExitHandler.java
new file mode 100644
index 00000000..3e33a48b
--- /dev/null
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/AppExitHandler.java
@@ -0,0 +1,31 @@
+/*============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.certservice.client;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class AppExitHandler {
+    public static final Logger LOGGER = LoggerFactory.getLogger(AppExitHandler.class);
+
+    public void exit(int exitCode) {
+        LOGGER.debug("Application exits with following exit code: " + exitCode);
+        System.exit(exitCode);
+    }
+}
\ No newline at end of file
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/CertServiceClient.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/CertServiceClient.java
index 6e83a40e..ac1062a0 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/CertServiceClient.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/CertServiceClient.java
@@ -19,18 +19,46 @@
 
 package org.onap.aaf.certservice.client;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import org.onap.aaf.certservice.client.api.ExitableException;
+import org.onap.aaf.certservice.client.certification.KeyPairFactory;
+import org.onap.aaf.certservice.client.configuration.EnvsForClient;
+import org.onap.aaf.certservice.client.configuration.EnvsForCsr;
+import org.onap.aaf.certservice.client.configuration.factory.ClientConfigurationFactory;
+import org.onap.aaf.certservice.client.configuration.factory.CsrConfigurationFactory;
+import org.onap.aaf.certservice.client.configuration.model.ClientConfiguration;
+import org.onap.aaf.certservice.client.configuration.model.CsrConfiguration;
+
+import java.security.KeyPair;
+import java.util.Optional;
+
+import static org.onap.aaf.certservice.client.certification.EncryptionAlgorithmConstants.KEY_SIZE;
+import static org.onap.aaf.certservice.client.certification.EncryptionAlgorithmConstants.RSA_ENCRYPTION_ALGORITHM;
 
 public class CertServiceClient {
-    private static final Logger LOGGER = LoggerFactory.getLogger(CertServiceClient.class);
+    private AppExitHandler appExitHandler;
+
+    public CertServiceClient(AppExitHandler appExitHandler) {
+        this.appExitHandler = appExitHandler;
+    }
+
+    public void run() {
+        ClientConfiguration clientConfiguration;
+        CsrConfiguration csrConfiguration;
+        clientConfiguration = new ClientConfigurationFactory(new EnvsForClient()).create();
+        csrConfiguration = new CsrConfigurationFactory(new EnvsForCsr()).create();
+
+        KeyPairFactory keyPairFactory = new KeyPairFactory(RSA_ENCRYPTION_ALGORITHM, KEY_SIZE);
+        Optional<KeyPair> keyPair = generateKeyPair(keyPairFactory);
 
-    public void run(String[] args) {
-        exit(0);
+        appExitHandler.exit(0);
     }
 
-    protected void exit(int statusCode){
-        LOGGER.debug("Application exits with following exit code: " + statusCode);
-        System.exit(statusCode);
+    public Optional<KeyPair> generateKeyPair(KeyPairFactory keyPairFactory) {
+        try {
+            return Optional.of(keyPairFactory.create());
+        } catch (ExitableException e) {
+            appExitHandler.exit(e.applicationExitCode());
+        }
+        return Optional.empty();
     }
 }
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/CertServiceClientApp.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/MainApp.java
index adbb02ad..6a29241f 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/CertServiceClientApp.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/MainApp.java
@@ -20,9 +20,9 @@
 
 package org.onap.aaf.certservice.client;
 
-public class CertServiceClientApp {
+public class MainApp {
     public static void main(String[] args) {
-        CertServiceClient certServiceClient = new CertServiceClient();
-        certServiceClient.run(args);
+        CertServiceClient certServiceClient = new CertServiceClient(new AppExitHandler());
+        certServiceClient.run();
     }
 }
\ No newline at end of file
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/api/ExitCode.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/api/ExitCode.java
new file mode 100644
index 00000000..aed9f3fe
--- /dev/null
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/api/ExitCode.java
@@ -0,0 +1,35 @@
+/*============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.certservice.client.api;
+
+public enum ExitCode {
+    CLIENT_CONFIGURATION_EXCEPTION(1),
+    CSR_CONFIGURATION_EXCEPTION(2),
+    KEY_PAIR_GENERATION_EXCEPTION(3);
+
+    private final int value;
+
+    ExitCode(int value) {
+        this.value = value;
+    }
+
+    public int getValue() {
+        return value;
+    }
+}
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/api/ExitableException.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/api/ExitableException.java
new file mode 100644
index 00000000..e884d11a
--- /dev/null
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/api/ExitableException.java
@@ -0,0 +1,31 @@
+/*============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.certservice.client.api;
+
+public abstract class ExitableException extends RuntimeException {
+    public ExitableException(Throwable e) {
+        super(e);
+    }
+
+    public ExitableException(String message) {
+        super(message);
+    }
+
+    public abstract int applicationExitCode();
+}
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/exceptions/ClientConfigurationException.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/certification/EncryptionAlgorithmConstants.java
index c895e176..2afdbee0 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/exceptions/ClientConfigurationException.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/certification/EncryptionAlgorithmConstants.java
@@ -1,6 +1,5 @@
-/*
- * ============LICENSE_START=======================================================
- * PROJECT
+/*============LICENSE_START=======================================================
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -17,12 +16,9 @@
  * limitations under the License.
  * ============LICENSE_END=========================================================
  */
+package org.onap.aaf.certservice.client.certification;
 
-package org.onap.aaf.certservice.client.exceptions;
-
-
-public class ClientConfigurationException extends RuntimeException {
-    public ClientConfigurationException(String message) {
-        super(message);
-    }
+public class EncryptionAlgorithmConstants {
+    public static final String RSA_ENCRYPTION_ALGORITHM = "RSA";
+    public static final int KEY_SIZE = 2048;
 }
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/certification/KeyPairFactory.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/certification/KeyPairFactory.java
new file mode 100644
index 00000000..6ad6528a
--- /dev/null
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/certification/KeyPairFactory.java
@@ -0,0 +1,54 @@
+/*============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.certservice.client.certification;
+
+import org.onap.aaf.certservice.client.certification.exception.KeyPairGenerationException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.NoSuchAlgorithmException;
+
+public class KeyPairFactory {
+
+    private final Logger LOGGER = LoggerFactory.getLogger(KeyPairFactory.class);
+    private final String encryptionAlgorithm;
+    private final int keySize;
+
+    public KeyPairFactory(String encryptionAlgorithm, int keySize) {
+        this.encryptionAlgorithm = encryptionAlgorithm;
+        this.keySize = keySize;
+    }
+
+    public KeyPair create() {
+        try {
+            return createKeyPairGenerator().generateKeyPair();
+        } catch (NoSuchAlgorithmException e) {
+            LOGGER.error("Generation of KeyPair failed, exception message: " + e.getMessage());
+            throw new KeyPairGenerationException(e);
+        }
+    }
+
+    private KeyPairGenerator createKeyPairGenerator() throws NoSuchAlgorithmException {
+        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(encryptionAlgorithm);
+        keyPairGenerator.initialize(keySize);
+        return keyPairGenerator;
+    }
+}
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/certification/exception/KeyPairGenerationException.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/certification/exception/KeyPairGenerationException.java
new file mode 100644
index 00000000..6af69889
--- /dev/null
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/certification/exception/KeyPairGenerationException.java
@@ -0,0 +1,34 @@
+/*============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.certservice.client.certification.exception;
+
+import org.onap.aaf.certservice.client.api.ExitCode;
+import org.onap.aaf.certservice.client.api.ExitableException;
+
+public class KeyPairGenerationException extends ExitableException {
+    private static final ExitCode EXIT_CODE = ExitCode.KEY_PAIR_GENERATION_EXCEPTION;
+
+    public KeyPairGenerationException(Throwable e) {
+        super(e);
+    }
+
+    public int applicationExitCode() {
+        return EXIT_CODE.getValue();
+    }
+}
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/ClientConfigurationEnvs.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/ClientConfigurationEnvs.java
index 57e46be9..779e65bb 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/ClientConfigurationEnvs.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/ClientConfigurationEnvs.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,7 +18,7 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.common;
+package org.onap.aaf.certservice.client.configuration;
 
 public enum ClientConfigurationEnvs {
     REQUEST_URL,
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/CsrConfigurationEnvs.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/CsrConfigurationEnvs.java
index 5913b73b..d1cfcd5a 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/CsrConfigurationEnvs.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/CsrConfigurationEnvs.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,7 +18,7 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.common;
+package org.onap.aaf.certservice.client.configuration;
 
 public enum CsrConfigurationEnvs {
     COMMON_NAME,
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/EnvProvider.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/EnvProvider.java
index fce2568b..9592ac3e 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/EnvProvider.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/EnvProvider.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,9 +18,10 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.common;
+package org.onap.aaf.certservice.client.configuration;
 
-import org.onap.aaf.certservice.client.exceptions.ClientConfigurationException;
+
+import org.onap.aaf.certservice.client.configuration.exception.ClientConfigurationException;
 
 public class EnvProvider {
     public String readEnvVariable(String envVariable) throws ClientConfigurationException {
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/EnvValidationUtils.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/EnvValidationUtils.java
index bd71c3cd..b87df5be 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/EnvValidationUtils.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/EnvValidationUtils.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,7 +18,7 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.common;
+package org.onap.aaf.certservice.client.configuration;
 
 import java.util.regex.Pattern;
 
@@ -61,7 +61,6 @@ public final class EnvValidationUtils {
         return Pattern.compile("[h][t][t][p][:][/][/]|[h][t][t][p][s][:][/][/]").matcher(stringToCheck).find();
     }
 
-
     public static Boolean isSpecialCharsPresent(String stringToCheck) {
         return Pattern.compile("[~#@*$+%!()?/{}<>\\|_^]").matcher(stringToCheck).find();
     }
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/EnvsForClient.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/EnvsForClient.java
index 1ba32a3f..aad64f5b 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/EnvsForClient.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/EnvsForClient.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -17,18 +17,16 @@
  * limitations under the License.
  * ============LICENSE_END=========================================================
  */
-
-package org.onap.aaf.certservice.client.common;
+package org.onap.aaf.certservice.client.configuration;
 
 public class EnvsForClient {
+    private static final EnvProvider envProvider = new EnvProvider();
+    private final String urlToCertService;
+    private final String requestTimeOut;
+    private final String outputPath;
+    private final String caName;
 
-    private String urlToCertService;
-    private String requestTimeOut;
-    private String outputPath;
-    private String caName;
-
-    EnvsForClient() {
-        EnvProvider envProvider = new EnvProvider();
+    public EnvsForClient() {
         this.urlToCertService = envProvider.readEnvVariable(ClientConfigurationEnvs.REQUEST_URL.toString());
         this.requestTimeOut = envProvider.readEnvVariable(ClientConfigurationEnvs.REQUEST_TIMEOUT.toString());
         this.outputPath = envProvider.readEnvVariable(ClientConfigurationEnvs.OUTPUT_PATH.toString());
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/EnvsForCsr.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/EnvsForCsr.java
index 1f6c9c96..0c948d3f 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/common/EnvsForCsr.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/EnvsForCsr.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -17,10 +17,11 @@
  * limitations under the License.
  * ============LICENSE_END=========================================================
  */
+package org.onap.aaf.certservice.client.configuration;
 
-package org.onap.aaf.certservice.client.common;
 
 public class EnvsForCsr {
+    private final EnvProvider envProvider = new EnvProvider();
     private String commonName;
     private String organization;
     private String organizationUnit;
@@ -29,8 +30,7 @@ public class EnvsForCsr {
     private String country;
     private String subjectAlternativesName;
 
-    EnvsForCsr() {
-        EnvProvider envProvider = new EnvProvider();
+    public EnvsForCsr() {
         this.commonName = envProvider.readEnvVariable(CsrConfigurationEnvs.COMMON_NAME.toString());
         this.organization = envProvider.readEnvVariable(CsrConfigurationEnvs.ORGANIZATION.toString());
         this.organizationUnit = envProvider.readEnvVariable(CsrConfigurationEnvs.ORGANIZATION_UNIT.toString());
@@ -64,7 +64,6 @@ public class EnvsForCsr {
         return country;
     }
 
-
     public String getSubjectAlternativesName() {
         return subjectAlternativesName;
     }
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/exception/ClientConfigurationException.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/exception/ClientConfigurationException.java
new file mode 100644
index 00000000..5d968f43
--- /dev/null
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/exception/ClientConfigurationException.java
@@ -0,0 +1,35 @@
+/*
+ * ============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.certservice.client.configuration.exception;
+
+import org.onap.aaf.certservice.client.api.ExitCode;
+import org.onap.aaf.certservice.client.api.ExitableException;
+
+public class ClientConfigurationException extends ExitableException {
+    private static final ExitCode EXIT_CODE = ExitCode.CLIENT_CONFIGURATION_EXCEPTION;
+
+    public ClientConfigurationException(String message) {
+        super(message);
+    }
+
+    public int applicationExitCode() {
+        return EXIT_CODE.getValue();
+    }
+}
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/exceptions/CsrConfigurationException.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/exception/CsrConfigurationException.java
index 83e38c32..f9373117 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/exceptions/CsrConfigurationException.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/exception/CsrConfigurationException.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -17,12 +17,19 @@
  * limitations under the License.
  * ============LICENSE_END=========================================================
  */
+package org.onap.aaf.certservice.client.configuration.exception;
 
-package org.onap.aaf.certservice.client.exceptions;
+import org.onap.aaf.certservice.client.api.ExitCode;
+import org.onap.aaf.certservice.client.api.ExitableException;
 
+public class CsrConfigurationException extends ExitableException {
+    private static final ExitCode EXIT_CODE = ExitCode.CSR_CONFIGURATION_EXCEPTION;
 
-public class CsrConfigurationException extends RuntimeException {
     public CsrConfigurationException(String message) {
         super(message);
     }
+
+    public int applicationExitCode() {
+        return EXIT_CODE.getValue();
+    }
 }
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/AbstractConfigurationFactory.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/factory/AbstractConfigurationFactory.java
index 6adbc038..28a5cf41 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/AbstractConfigurationFactory.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/factory/AbstractConfigurationFactory.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,7 +18,9 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.model;
+package org.onap.aaf.certservice.client.configuration.factory;
+
+import org.onap.aaf.certservice.client.configuration.model.ConfigurationModel;
 
 public interface AbstractConfigurationFactory<T extends ConfigurationModel> {
     T create();
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/ClientConfigurationFactory.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/factory/ClientConfigurationFactory.java
index 43c6838c..96b1fb8b 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/ClientConfigurationFactory.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/factory/ClientConfigurationFactory.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,25 +18,25 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.model;
+package org.onap.aaf.certservice.client.configuration.factory;
 
-import org.onap.aaf.certservice.client.common.ClientConfigurationEnvs;
-import org.onap.aaf.certservice.client.common.EnvValidationUtils;
-import org.onap.aaf.certservice.client.common.EnvsForClient;
-import org.onap.aaf.certservice.client.exceptions.ClientConfigurationException;
+import org.onap.aaf.certservice.client.configuration.ClientConfigurationEnvs;
+import org.onap.aaf.certservice.client.configuration.EnvValidationUtils;
+import org.onap.aaf.certservice.client.configuration.EnvsForClient;
+import org.onap.aaf.certservice.client.configuration.exception.ClientConfigurationException;
+import org.onap.aaf.certservice.client.configuration.model.ClientConfiguration;
 
 import java.util.Optional;
 
-class ClientConfigurationFactory implements AbstractConfigurationFactory<ClientConfiguration> {
+public class ClientConfigurationFactory implements AbstractConfigurationFactory<ClientConfiguration> {
 
     private final EnvsForClient envsForClient;
 
 
-    ClientConfigurationFactory(EnvsForClient envsForClient) {
+    public ClientConfigurationFactory(EnvsForClient envsForClient) {
         this.envsForClient = envsForClient;
     }
 
-
     @Override
     public ClientConfiguration create() throws ClientConfigurationException {
 
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/CsrConfigurationFactory.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/factory/CsrConfigurationFactory.java
index 1b3a252b..61e1b3c3 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/CsrConfigurationFactory.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/factory/CsrConfigurationFactory.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,21 +18,22 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.model;
+package org.onap.aaf.certservice.client.configuration.factory;
 
-import org.onap.aaf.certservice.client.common.CsrConfigurationEnvs;
-import org.onap.aaf.certservice.client.common.EnvValidationUtils;
-import org.onap.aaf.certservice.client.common.EnvsForCsr;
-import org.onap.aaf.certservice.client.exceptions.CsrConfigurationException;
+import org.onap.aaf.certservice.client.configuration.CsrConfigurationEnvs;
+import org.onap.aaf.certservice.client.configuration.EnvValidationUtils;
+import org.onap.aaf.certservice.client.configuration.EnvsForCsr;
+import org.onap.aaf.certservice.client.configuration.exception.CsrConfigurationException;
+import org.onap.aaf.certservice.client.configuration.model.CsrConfiguration;
 
 import java.util.Optional;
 
-class CsrConfigurationFactory implements AbstractConfigurationFactory<CsrConfiguration> {
+public class CsrConfigurationFactory implements AbstractConfigurationFactory<CsrConfiguration> {
 
     private final EnvsForCsr envsForCsr;
 
 
-    CsrConfigurationFactory(EnvsForCsr envsForCsr) {
+    public CsrConfigurationFactory(EnvsForCsr envsForCsr) {
         this.envsForCsr = envsForCsr;
     }
 
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/ClientConfiguration.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/model/ClientConfiguration.java
index 4dda61ea..d6496b7a 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/ClientConfiguration.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/model/ClientConfiguration.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,9 +18,9 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.model;
+package org.onap.aaf.certservice.client.configuration.model;
 
-public class ClientConfiguration implements ConfigurationModel{
+public class ClientConfiguration implements ConfigurationModel {
 
     Integer DEFAULT_TIMEOUT_MS = 30000;
     String DEFAULT_REQUEST_URL = "http://cert-service:8080/v1/certificate/";
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/ConfigurationModel.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/model/ConfigurationModel.java
index ca7deb72..15c22233 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/ConfigurationModel.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/model/ConfigurationModel.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,7 +18,7 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.model;
+package org.onap.aaf.certservice.client.configuration.model;
 
 public interface ConfigurationModel {
 }
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/CsrConfiguration.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/model/CsrConfiguration.java
index 27b6d931..30caf42a 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/model/CsrConfiguration.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/configuration/model/CsrConfiguration.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,7 +18,7 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.model;
+package org.onap.aaf.certservice.client.configuration.model;
 
 
 public class CsrConfiguration implements ConfigurationModel {
diff --git a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CertServiceClientTest.java b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CertServiceClientTest.java
index 12c2db06..22baab50 100644
--- a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CertServiceClientTest.java
+++ b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CertServiceClientTest.java
@@ -16,33 +16,54 @@
  * limitations under the License.
  * ============LICENSE_END=========================================================
  */
-
 package org.onap.aaf.certservice.client;
 
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.Spy;
 import org.mockito.junit.jupiter.MockitoExtension;
+import org.onap.aaf.certservice.client.certification.KeyPairFactory;
+
+import java.security.KeyPair;
+import java.util.Optional;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.onap.aaf.certservice.client.certification.EncryptionAlgorithmConstants.KEY_SIZE;
+import static org.onap.aaf.certservice.client.certification.EncryptionAlgorithmConstants.RSA_ENCRYPTION_ALGORITHM;
 
 @ExtendWith(MockitoExtension.class)
 class CertServiceClientTest {
+    private static final int DUMMY_EXIT_CODE = 888;
     @Spy
-    CertServiceClient certServiceClient = new CertServiceClient();
+    AppExitHandler appExitHandler = new AppExitHandler();
+
+    @Test
+    public void shouldExitWithDefinedExitCode_onGenerateKeyPairCallWhereExitableExceptionIsThrown() {
+        //  given
+        KeyPairFactory keyPairFactory = mock(KeyPairFactory.class);
+        when(keyPairFactory.create()).thenThrow(new DummyExitableException());
+        doNothing().when(appExitHandler).exit(DUMMY_EXIT_CODE);
+        CertServiceClient certServiceClient = new CertServiceClient(appExitHandler);
+        //  when
+        Optional<KeyPair> keyPair = certServiceClient.generateKeyPair(keyPairFactory);
+        //  then
+        verify(appExitHandler).exit(DUMMY_EXIT_CODE);
+        assertThat(keyPair).isEmpty();
+    }
 
-    //  Sonar check for this test disabled due to lack of assertion in test.
-    //  Intention of this test is to check if app runs without exiting Java.
     @Test
-    public void shouldExitWithZero_onApplicationSuccessfulFinish() {   //NOSONAR
+    public void shouldReturnKeyPair_onGenerateKeyPairCall() {
         //  given
-        String[] params = {""};
-        doNothing().when(certServiceClient).exit(0);
+        KeyPairFactory keyPairFactory = new KeyPairFactory(RSA_ENCRYPTION_ALGORITHM, KEY_SIZE);
+        CertServiceClient certServiceClient = new CertServiceClient(appExitHandler);
         //  when
-        certServiceClient.run(params);
+        Optional<KeyPair> keyPair = certServiceClient.generateKeyPair(keyPairFactory);
         //  then
-        verify(certServiceClient).exit(0);
+        assertThat(keyPair).hasValueSatisfying(value -> assertThat(value).isInstanceOf(KeyPair.class));
     }
 
 }
\ No newline at end of file
diff --git a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/DummyExitableException.java b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/DummyExitableException.java
new file mode 100644
index 00000000..80a2f723
--- /dev/null
+++ b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/DummyExitableException.java
@@ -0,0 +1,35 @@
+/*============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.certservice.client;
+
+import org.onap.aaf.certservice.client.api.ExitableException;
+
+class DummyExitableException extends ExitableException {
+    private static final int EXIT_CODE = 888;
+
+    DummyExitableException() {
+        super("This is Test Exitable Exception");
+    }
+
+    @Override
+    public int applicationExitCode() {
+        return EXIT_CODE;
+    }
+
+}
diff --git a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/certification/KeyPairFactoryTest.java b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/certification/KeyPairFactoryTest.java
new file mode 100644
index 00000000..b92660fa
--- /dev/null
+++ b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/certification/KeyPairFactoryTest.java
@@ -0,0 +1,52 @@
+/*============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.certservice.client.certification;
+
+import org.junit.jupiter.api.Test;
+import org.onap.aaf.certservice.client.certification.exception.KeyPairGenerationException;
+
+import java.security.KeyPair;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class KeyPairFactoryTest {
+    private static final String NOT_EXISTING_ENCRYPTION_ALGORITHM = "FAKE_ALGORITHM";
+
+    @Test
+    public void shouldProvideKeyPair_whenCreateKeyPairCalledWithCorrectArguments() {
+        //  given
+        KeyPairFactory keyPairFactory = new KeyPairFactory(EncryptionAlgorithmConstants.RSA_ENCRYPTION_ALGORITHM,
+                EncryptionAlgorithmConstants.KEY_SIZE);
+        //  when
+        KeyPair keyPair = keyPairFactory.create();
+        // then
+        assertThat(keyPair).isInstanceOf(KeyPair.class);
+    }
+
+    @Test
+    public void shouldThrowKeyPairGenerationException_whenCreateTryCalledOnNotExistingAlgorithm() {
+        //  given
+        KeyPairFactory keyPairFactory = new KeyPairFactory(NOT_EXISTING_ENCRYPTION_ALGORITHM,
+                EncryptionAlgorithmConstants.KEY_SIZE);
+        //  when, then
+        assertThatThrownBy(() -> keyPairFactory.create()).isInstanceOf(KeyPairGenerationException.class);
+    }
+
+}
\ No newline at end of file
diff --git a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/model/ClientConfigurationFactoryTest.java b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/configuration/model/ClientConfigurationFactoryTest.java
index e21f2510..7cf9e0ce 100644
--- a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/model/ClientConfigurationFactoryTest.java
+++ b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/configuration/model/ClientConfigurationFactoryTest.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,12 +18,13 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.model;
+package org.onap.aaf.certservice.client.configuration.model;
 
 import org.junit.jupiter.api.Test;
-import org.onap.aaf.certservice.client.common.ClientConfigurationEnvs;
-import org.onap.aaf.certservice.client.common.EnvsForClient;
-import org.onap.aaf.certservice.client.exceptions.ClientConfigurationException;
+import org.onap.aaf.certservice.client.configuration.ClientConfigurationEnvs;
+import org.onap.aaf.certservice.client.configuration.EnvsForClient;
+import org.onap.aaf.certservice.client.configuration.exception.ClientConfigurationException;
+import org.onap.aaf.certservice.client.configuration.factory.ClientConfigurationFactory;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
@@ -41,7 +42,6 @@ public class ClientConfigurationFactoryTest {
 
     private EnvsForClient envsForClient = mock(EnvsForClient.class);
 
-
     @Test
     void create_shouldReturnSuccessWhenAllVariablesAreSetAndValid() {
         // given
diff --git a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/model/CsrConfigurationFactoryTest.java b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/configuration/model/CsrConfigurationFactoryTest.java
index 39d44592..4a4eb247 100644
--- a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/model/CsrConfigurationFactoryTest.java
+++ b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/configuration/model/CsrConfigurationFactoryTest.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * PROJECT
+ * aaf-certservice-client
  * ================================================================================
  * Copyright (C) 2020 Nokia. All rights reserved.
  * ================================================================================
@@ -18,12 +18,13 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.aaf.certservice.client.model;
+package org.onap.aaf.certservice.client.configuration.model;
 
 import org.junit.jupiter.api.Test;
-import org.onap.aaf.certservice.client.common.CsrConfigurationEnvs;
-import org.onap.aaf.certservice.client.common.EnvsForCsr;
-import org.onap.aaf.certservice.client.exceptions.CsrConfigurationException;
+import org.onap.aaf.certservice.client.configuration.CsrConfigurationEnvs;
+import org.onap.aaf.certservice.client.configuration.EnvsForCsr;
+import org.onap.aaf.certservice.client.configuration.exception.CsrConfigurationException;
+import org.onap.aaf.certservice.client.configuration.factory.CsrConfigurationFactory;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;