AMQP-626: Add keystore\truststore type setters

JIRA: https://jira.spring.io/browse/AMQP-626
Fixes GH-436 (https://github.com/spring-projects/spring-amqp/issues/436)

Currently the `RabbitConnectionFactoryBean` has hard-coded keystore/truststore types.

* Add setters for keystore/truststore types and leave previously-hardcoded as default values.
* Add `keyStore.type` and `trustStore.type` properties for the `ssl.properties` resource

spring-rabbit/src/main/java/org/springframework/amqp/rabbit/connection/RabbitConnectionFactoryBean.java

@@ -57,6 +57,7 @@ import com.rabbitmq.client.SocketConfigurator;
  * Override {@link #setUpSSL()} to take complete control over setting up SSL.
  *
  * @author Gary Russell
+ * @author Heath Abelson
  *
  * @since 1.4
  */
@@ -70,8 +71,16 @@ public class RabbitConnectionFactoryBean extends AbstractFactoryBean<ConnectionF
 
 	private static final String TRUST_STORE_PASS_PHRASE = "trustStore.passPhrase";
 
+	private static final String KEY_STORE_TYPE = "keyStore.type";
+
+	private static final String TRUST_STORE_TYPE = "trustStore.type";
+
 	private static final String TLS_V1_1 = "TLSv1.1";
 
+	private static final String KEY_STORE_DEFAULT_TYPE = "PKCS12";
+
+	private static final String TRUST_STORE_DEFAULT_TYPE = "JKS";
+
 	protected final ConnectionFactory connectionFactory = new ConnectionFactory();
 
 	private final Properties sslProperties = new Properties();
@@ -88,6 +97,10 @@ public class RabbitConnectionFactoryBean extends AbstractFactoryBean<ConnectionF
 
 	private volatile String trustStorePassphrase;
 
+	private volatile String keyStoreType;
+
+	private volatile String trustStoreType;
+
 	private volatile String sslAlgorithm = TLS_V1_1;
 
 	private volatile boolean sslAlgorithmSet;
@@ -225,6 +238,64 @@ public class RabbitConnectionFactoryBean extends AbstractFactoryBean<ConnectionF
 		this.trustStorePassphrase = trustStorePassphrase;
 	}
 
+	/**
+	 * Get the key store type - this defaults to PKCS12 if not overridden by
+	 * {@link #setSslPropertiesLocation(Resource)} or {@link #setKeyStoreType}
+	 * @return the key store type.
+	 * @since 1.6.2
+	 */
+	protected String getKeyStoreType() {
+		if (this.keyStoreType == null && this.sslProperties.getProperty(KEY_STORE_TYPE) == null) {
+			return KEY_STORE_DEFAULT_TYPE;
+		}
+		else if (this.keyStoreType != null) {
+			return this.keyStoreType;
+		}
+		else {
+			return this.sslProperties.getProperty(KEY_STORE_TYPE);
+		}
+	}
+
+	/**
+	 * Set the key store type - overrides
+	 * the property in {@link #setSslPropertiesLocation(Resource)}.
+	 * @param keyStoreType the key store type.
+	 * @see java.security.KeyStore#getInstance(String)
+	 * @since 1.6.2
+	 */
+	public void setKeyStoreType(String keyStoreType) {
+		this.keyStoreType = keyStoreType;
+	}
+
+	/**
+	 * Get the trust store type - this defaults to JKS if not overridden by
+	 * {@link #setSslPropertiesLocation(Resource)} or {@link #setTrustStoreType}
+	 * @return the trust store type.
+	 * @since 1.6.2
+	 */
+	protected String getTrustStoreType() {
+		if (this.trustStoreType == null && this.sslProperties.getProperty(TRUST_STORE_TYPE) == null) {
+			return TRUST_STORE_DEFAULT_TYPE;
+		}
+		else if (this.trustStoreType != null) {
+			return this.trustStoreType;
+		}
+		else {
+			return this.sslProperties.getProperty(TRUST_STORE_TYPE);
+		}
+	}
+
+	/**
+	 * Set the trust store type - overrides
+	 * the property in {@link #setSslPropertiesLocation(Resource)}.
+	 * @param trustStoreType the trust store type.
+	 * @see java.security.KeyStore#getInstance(String)
+	 * @since 1.6.2
+	 */
+	public void setTrustStoreType(String trustStoreType) {
+		this.trustStoreType = trustStoreType;
+	}
+
 	/**
 	 * @param host the host.
 	 * @see com.rabbitmq.client.ConnectionFactory#setHost(java.lang.String)
@@ -417,18 +488,20 @@ public class RabbitConnectionFactoryBean extends AbstractFactoryBean<ConnectionF
 			Assert.state(StringUtils.hasText(keyStorePassword), KEY_STORE_PASS_PHRASE + " property required");
 			String trustStorePassword = getTrustStorePassphrase();
 			Assert.state(StringUtils.hasText(trustStorePassword), TRUST_STORE_PASS_PHRASE + " property required");
+			String keyStoreType = getKeyStoreType();
+			String trustStoreType = getTrustStoreType();
 			Resource keyStore = resolver.getResource(keyStoreName);
 			Resource trustStore = resolver.getResource(trustStoreName);
 			char[] keyPassphrase = keyStorePassword.toCharArray();
 			char[] trustPassphrase = trustStorePassword.toCharArray();
 
-			KeyStore ks = KeyStore.getInstance("PKCS12");
+			KeyStore ks = KeyStore.getInstance(keyStoreType);
 			ks.load(keyStore.getInputStream(), keyPassphrase);
 
 			KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
 			kmf.init(ks, keyPassphrase);
 
-			KeyStore tks = KeyStore.getInstance("JKS");
+			KeyStore tks = KeyStore.getInstance(trustStoreType);
 			tks.load(trustStore.getInputStream(), trustPassphrase);
 
 			TrustManagerFactory tmf = TrustManagerFactory.getInstance("SunX509");

spring-rabbit/src/test/java/org/springframework/amqp/rabbit/connection/SSLConnectionTests.java

@@ -17,6 +17,7 @@
 package org.springframework.amqp.rabbit.connection;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 
@@ -35,6 +36,7 @@ import com.rabbitmq.client.ConnectionFactory;
 
 /**
  * @author Gary Russell
+ * @author Heath Abelson
  * @since 1.4.4
  *
  */
@@ -79,4 +81,56 @@ public class SSLConnectionTests {
 		verify(rabbitCf).useSslProtocol();
 	}
 
+	@Test
+	public void testTypeDefault() throws Exception {
+		RabbitConnectionFactoryBean fb = new RabbitConnectionFactoryBean();
+		assertEquals("PKCS12", fb.getKeyStoreType());
+		assertEquals("JKS", fb.getTrustStoreType());
+	}
+
+	@Test
+	public void testTypeProps() throws Exception {
+		RabbitConnectionFactoryBean fb = new RabbitConnectionFactoryBean();
+		fb.setSslPropertiesLocation(new ClassPathResource("ssl.properties"));
+		fb.afterPropertiesSet();
+		try {
+			fb.setUpSSL();
+			//Here we make sure the exception is thrown because setUpSSL() will fail.
+			// But we only care about having it load the props
+			fail("setupSSL should fail");
+		}
+		catch (Exception e) {
+			assertEquals("foo", fb.getKeyStoreType());
+			assertEquals("bar", fb.getTrustStoreType());
+		}
+	}
+
+	@Test
+	public void testTypeSettersNoProps() throws Exception {
+		RabbitConnectionFactoryBean fb = new RabbitConnectionFactoryBean();
+		fb.setKeyStoreType("alice");
+		fb.setTrustStoreType("bob");
+		assertEquals("alice", fb.getKeyStoreType());
+		assertEquals("bob", fb.getTrustStoreType());
+	}
+
+	@Test
+	public void testTypeSettersOverrideProps() throws Exception {
+		RabbitConnectionFactoryBean fb = new RabbitConnectionFactoryBean();
+		fb.setSslPropertiesLocation(new ClassPathResource("ssl.properties"));
+		fb.afterPropertiesSet();
+		fb.setKeyStoreType("alice");
+		fb.setTrustStoreType("bob");
+		try {
+			fb.setUpSSL();
+			// Here we make sure the exception is thrown because setUpSSL() will fail.
+			//But we only care about having it load the props
+			fail("setupSSL should fail");
+		}
+		catch (Exception e) {
+			assertEquals("alice", fb.getKeyStoreType());
+			assertEquals("bob", fb.getTrustStoreType());
+		}
+	}
+
 }

spring-rabbit/src/test/resources/ssl.properties

@@ -2,3 +2,5 @@ keyStore=file:/path/to/client/keycert.p12
 trustStore=file:/path/to/client/truststore
 keyStore.passPhrase=secret
 trustStore.passPhrase=secret
+keyStore.type=foo
+trustStore.type=bar