Add password input from environment variable and file

src/main/java/com/hivemq/cli/commands/AbstractCommonFlags.java

@@ -18,9 +18,7 @@
 
 import com.hivemq.cli.converters.*;
 import com.hivemq.cli.utils.MqttUtils;
-import com.hivemq.client.mqtt.MqttClient;
 import com.hivemq.client.mqtt.MqttClientSslConfig;
-import com.hivemq.client.mqtt.MqttVersion;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.pmw.tinylog.Logger;
@@ -36,7 +34,6 @@
 import java.security.cert.X509Certificate;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.List;
 
 public abstract class AbstractCommonFlags extends AbstractConnectRestrictionFlags implements Connect {
 
@@ -50,6 +47,16 @@ public abstract class AbstractCommonFlags extends AbstractConnectRestrictionFlag
     @Nullable
     private ByteBuffer password;
 
+    @CommandLine.Option(names = {"-pw:env"}, converter = EnvVarToByteBufferConverter.class, description = "The password for authentication read in from an environment variable", order = 2)
+    private void setPasswordFromEnv(final @NotNull ByteBuffer passwordEnvironmentVariable) {
+        password = passwordEnvironmentVariable;
+    }
+
+    @CommandLine.Option(names = {"-pw:file"}, converter = FileToByteBufferConverter.class, description = "The password for authentication read in from a file", order = 2)
+    private void setPasswordFromFile(final @NotNull ByteBuffer passwordFromFile) {
+        password = passwordFromFile;
+    }
+
     @CommandLine.Option(names = {"-k", "--keepAlive"}, converter = UnsignedShortConverter.class, description = "A keep alive of the client (in seconds) (default: 60)", order = 2)
     private @Nullable Integer keepAlive;
 
@@ -83,7 +90,6 @@ public abstract class AbstractCommonFlags extends AbstractConnectRestrictionFlag
     @Nullable PrivateKey clientPrivateKey;
 
 
-
     public @Nullable MqttClientSslConfig buildSslConfig() {
 
         if (useBuiltSslConfig()) {

src/main/java/com/hivemq/cli/converters/EnvVarToByteBufferConverter.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2019 HiveMQ and the HiveMQ Community
+ *
+ * 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.
+ *
+ */
+package com.hivemq.cli.converters;
+
+import picocli.CommandLine;
+
+import java.nio.ByteBuffer;
+
+public class EnvVarToByteBufferConverter implements CommandLine.ITypeConverter<ByteBuffer> {
+
+    static final String ENVIRONMENT_VARIABLE_IS_NULL = "The given environment variable is not defined.";
+
+    @Override
+    public ByteBuffer convert(String value) throws Exception {
+        final ByteBufferConverter converter = new ByteBufferConverter();
+        final String envVar = System.getenv(value);
+
+        if (envVar == null) {
+            throw new NullPointerException(ENVIRONMENT_VARIABLE_IS_NULL);
+        }
+
+        return converter.convert(envVar);
+    }
+}

src/main/java/com/hivemq/cli/converters/FileConverter.java

@@ -0,0 +1,42 @@
+package com.hivemq.cli.converters;
+/*
+ * Copyright 2019 HiveMQ and the HiveMQ Community
+ *
+ * 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.
+ *
+ */
+import picocli.CommandLine;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+
+class FileConverter implements CommandLine.ITypeConverter<File> {
+
+    static final String FILE_NOT_FOUND = "The given file was not found.";
+    static final String NOT_A_FILE = "The given path does not lead to a valid file.";
+
+    @Override
+    public File convert(String value) throws Exception {
+
+        final File file = new File(value);
+
+        if (!file.exists())
+            throw new FileNotFoundException(FILE_NOT_FOUND);
+
+        if (!file.isFile())
+            throw new IllegalArgumentException(NOT_A_FILE);
+
+
+        return file;
+    }
+}

src/main/java/com/hivemq/cli/converters/FileToByteBufferConverter.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2019 HiveMQ and the HiveMQ Community
+ *
+ * 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.
+ *
+ */
+package com.hivemq.cli.converters;
+
+import picocli.CommandLine;
+
+import java.io.File;
+import java.nio.ByteBuffer;
+import java.nio.file.Files;
+
+public class FileToByteBufferConverter implements CommandLine.ITypeConverter<ByteBuffer> {
+    @Override
+    public ByteBuffer convert(String value) throws Exception {
+        final ByteBufferConverter byteBufferConverter = new ByteBufferConverter();
+        final FileConverter fileConverter = new FileConverter();
+
+        final File file = fileConverter.convert(value);
+        final String password = new String(Files.readAllBytes(file.toPath()));
+
+        return byteBufferConverter.convert(password);
+    }
+}

src/main/java/com/hivemq/cli/converters/FileToCertificateConverter.java

@@ -27,21 +27,13 @@
 
 public class FileToCertificateConverter implements CommandLine.ITypeConverter<X509Certificate> {
 
-
-    static final String FILE_NOT_FOUND = "The given certificate file was not found.";
     static final String NO_VALID_FILE_EXTENSION = "The given file does not conform to a valid Certificate File Extension as " + Arrays.toString(CertificateConverterUtils.FILE_EXTENSIONS);
-    static final String NOT_A_FILE = "The given path is not a valid file.";
 
     @Override
     public X509Certificate convert(final @NotNull String s) throws Exception {
 
-        final File keyFile = new File(s);
-
-        if (!keyFile.exists())
-            throw new FileNotFoundException(FILE_NOT_FOUND);
-
-        if (!keyFile.isFile())
-            throw new IllegalArgumentException(NOT_A_FILE);
+        FileConverter fileConverter = new FileConverter();
+        final File keyFile = fileConverter.convert(s);
 
         final boolean correctExtension = CertificateConverterUtils.endsWithValidExtension(keyFile.getName());
 

src/main/java/com/hivemq/cli/converters/FileToPrivateKeyConverter.java

@@ -44,7 +44,8 @@ public class FileToPrivateKeyConverter implements CommandLine.ITypeConverter<Pri
 
     @Override
     public PrivateKey convert(final @NotNull String s) throws Exception {
-        final File keyFile = new File(s);
+        final FileConverter fileConverter = new FileConverter();
+        final File keyFile = fileConverter.convert(s);
         return getPrivateKeyFromFile(keyFile);
     }
 

src/test/java/com/hivemq/cli/converters/FileToCertificateConverterTest.java

@@ -63,7 +63,7 @@ void convertSuccess() throws Exception {
     @Test
     void convert_FileNotFound() {
         Exception e = assertThrows(FileNotFoundException.class, () -> fileToCertificateConverter.convert("wrongPathXYZ.pem"));
-        assertEquals(FileToCertificateConverter.FILE_NOT_FOUND, e.getMessage());
+        assertEquals(FileConverter.FILE_NOT_FOUND, e.getMessage());
     }
 
     @Test