Do not set Tomcat's key store and key pass when null

Fixes gh-24041

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/SslConnectorCustomizer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -69,8 +69,12 @@ class SslConnectorCustomizer implements TomcatConnectorCustomizer {
 		protocol.setSSLEnabled(true);
 		protocol.setSslProtocol(ssl.getProtocol());
 		configureSslClientAuth(protocol, ssl);
-		protocol.setKeystorePass(ssl.getKeyStorePassword());
-		protocol.setKeyPass(ssl.getKeyPassword());
+		if (ssl.getKeyStorePassword() != null) {
+			protocol.setKeystorePass(ssl.getKeyStorePassword());
+		}
+		if (ssl.getKeyPassword() != null) {
+			protocol.setKeyPass(ssl.getKeyPassword());
+		}
 		protocol.setKeyAlias(ssl.getKeyAlias());
 		String ciphers = StringUtils.arrayToCommaDelimitedString(ssl.getCiphers());
 		if (StringUtils.hasText(ciphers)) {

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/embedded/tomcat/SslConnectorCustomizerTests.java

@@ -28,6 +28,7 @@ import org.apache.catalina.LifecycleState;
 import org.apache.catalina.connector.Connector;
 import org.apache.catalina.startup.Tomcat;
 import org.apache.catalina.webresources.TomcatURLStreamHandlerFactory;
+import org.apache.coyote.http11.Http11NioProtocol;
 import org.apache.tomcat.util.net.SSLHostConfig;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
@@ -185,6 +186,26 @@ class SslConnectorCustomizerTests {
 				.withMessageContaining("Could not load key store 'null'");
 	}
 
+	@Test
+	void keyStorePasswordIsNotSetWhenNull() {
+		Http11NioProtocol protocol = (Http11NioProtocol) this.tomcat.getConnector().getProtocolHandler();
+		protocol.setKeystorePass("password");
+		Ssl ssl = new Ssl();
+		ssl.setKeyStore("src/test/resources/test.jks");
+		new SslConnectorCustomizer(ssl, null).customize(this.tomcat.getConnector());
+		assertThat(protocol.getKeystorePass()).isEqualTo("password");
+	}
+
+	@Test
+	void keyPasswordIsNotSetWhenNull() {
+		Http11NioProtocol protocol = (Http11NioProtocol) this.tomcat.getConnector().getProtocolHandler();
+		protocol.setKeyPass("password");
+		Ssl ssl = new Ssl();
+		ssl.setKeyStore("src/test/resources/test.jks");
+		new SslConnectorCustomizer(ssl, null).customize(this.tomcat.getConnector());
+		assertThat(protocol.getKeyPass()).isEqualTo("password");
+	}
+
 	private KeyStore loadStore() throws KeyStoreException, IOException, NoSuchAlgorithmException, CertificateException {
 		KeyStore keyStore = KeyStore.getInstance("JKS");
 		Resource resource = new ClassPathResource("test.jks");

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/reactive/server/AbstractReactiveWebServerFactoryTests.java

@@ -123,6 +123,7 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 		Ssl ssl = new Ssl();
 		ssl.setKeyStore(keyStore);
 		ssl.setKeyPassword(keyPassword);
+		ssl.setKeyStorePassword("secret");
 		factory.setSsl(ssl);
 		this.webServer = factory.getWebServer(new EchoHandler());
 		this.webServer.start();
@@ -142,6 +143,7 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 		AbstractReactiveWebServerFactory factory = getFactory();
 		Ssl ssl = new Ssl();
 		ssl.setKeyStore(keyStore);
+		ssl.setKeyStorePassword("secret");
 		ssl.setKeyPassword(keyPassword);
 		ssl.setKeyAlias("test-alias");
 		factory.setSsl(ssl);
@@ -187,6 +189,7 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 		ssl.setClientAuth(Ssl.ClientAuth.WANT);
 		ssl.setKeyStore("classpath:test.jks");
 		ssl.setKeyPassword("password");
+		ssl.setKeyStorePassword("secret");
 		ssl.setTrustStore("classpath:test.jks");
 		testClientAuthSuccess(ssl, buildTrustAllSslWithClientKeyConnector());
 	}
@@ -198,6 +201,7 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 		ssl.setKeyStore("classpath:test.jks");
 		ssl.setKeyPassword("password");
 		ssl.setTrustStore("classpath:test.jks");
+		ssl.setKeyStorePassword("secret");
 		testClientAuthSuccess(ssl, buildTrustAllSslConnector());
 	}
 
@@ -232,6 +236,7 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 		Ssl ssl = new Ssl();
 		ssl.setClientAuth(Ssl.ClientAuth.NEED);
 		ssl.setKeyStore("classpath:test.jks");
+		ssl.setKeyStorePassword("secret");
 		ssl.setKeyPassword("password");
 		ssl.setTrustStore("classpath:test.jks");
 		testClientAuthSuccess(ssl, buildTrustAllSslWithClientKeyConnector());
@@ -242,6 +247,7 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 		Ssl ssl = new Ssl();
 		ssl.setClientAuth(Ssl.ClientAuth.NEED);
 		ssl.setKeyStore("classpath:test.jks");
+		ssl.setKeyStorePassword("secret");
 		ssl.setKeyPassword("password");
 		ssl.setTrustStore("classpath:test.jks");
 		testClientAuthFailure(ssl, buildTrustAllSslConnector());