Add encodepassword command to the CLI

Update the CLI so that `encodepassword <password>` can be used to
generate an encoded password.

Fixes gh-11875

spring-boot-project/spring-boot-cli/src/test/java/org/springframework/boot/cli/command/encodepassword/EncodePasswordCommandTests.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright 2012-2018 the original author or authors.
+ *
+ * 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 org.springframework.boot.cli.command.encodepassword;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.MockitoAnnotations;
+
+import org.springframework.boot.cli.command.status.ExitStatus;
+import org.springframework.boot.cli.util.MockLog;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.Pbkdf2PasswordEncoder;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.verify;
+
+/**
+ * Tests for {@link EncodePasswordCommand}.
+ *
+ * @author Phillip Webb
+ */
+public class EncodePasswordCommandTests {
+
+	private MockLog log;
+
+	@Captor
+	private ArgumentCaptor<String> message;
+
+	@Before
+	public void setup() {
+		MockitoAnnotations.initMocks(this);
+		this.log = MockLog.attach();
+	}
+
+	@After
+	public void cleanup() {
+		MockLog.clear();
+	}
+
+	@Test
+	public void encodeWithNoAlgorithShouldUseBcrypt() throws Exception {
+		EncodePasswordCommand command = new EncodePasswordCommand();
+		ExitStatus status = command.run("boot");
+		verify(this.log).info(this.message.capture());
+		assertThat(new BCryptPasswordEncoder().matches("boot", this.message.getValue()))
+				.isTrue();
+		assertThat(status).isEqualTo(ExitStatus.OK);
+	}
+
+	@Test
+	public void encodeWithPbkdf2ShouldUsePbkdf2() throws Exception {
+		EncodePasswordCommand command = new EncodePasswordCommand();
+		ExitStatus status = command.run("-a", "pbkdf2", "boot");
+		verify(this.log).info(this.message.capture());
+		assertThat(new Pbkdf2PasswordEncoder().matches("boot", this.message.getValue()))
+				.isTrue();
+		assertThat(status).isEqualTo(ExitStatus.OK);
+	}
+
+	@Test
+	public void encodeWithUnkownAlgorithShouldExitWithError() throws Exception {
+		EncodePasswordCommand command = new EncodePasswordCommand();
+		ExitStatus status = command.run("--algorithm", "bad", "boot");
+		verify(this.log).error("Unknown algorithm, valid options are: bcrypt,pbkdf2");
+		assertThat(status).isEqualTo(ExitStatus.ERROR);
+	}
+
+}

spring-boot-project/spring-boot-cli/src/test/java/org/springframework/boot/cli/util/MockLog.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2012-2018 the original author or authors.
+ *
+ * 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 org.springframework.boot.cli.util;
+
+import static org.mockito.Mockito.mock;
+
+/**
+ * Mock log for testing message output.
+ *
+ * @author Phillip Webb
+ */
+public interface MockLog extends LogListener {
+
+	static MockLog attach() {
+		MockLog log = mock(MockLog.class);
+		Log.setListener(log);
+		return log;
+	}
+
+	static void clear() {
+		Log.setListener(null);
+	}
+
+}