En caso de que quiera hacerlo utilizando embarcadero 9, tenga en cuenta que desde el embarcadero-9.0 ya no es posible configurar un conector HTTPS directamente en el pom.xml: necesita usar los archivos de configuración de jetty xml para hacerlo.[1].
Aquí es un ejemplo:
pom.xml
<properties>
<jetty-version>9.1.2.v20140210</jetty-version>
</properties>
...
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>${jetty-version}</version>
</dependency>
...
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>keytool-maven-plugin</artifactId>
<version>1.3</version>
<executions>
<execution>
<phase>generate-resources</phase>
<id>clean</id>
<goals>
<goal>clean</goal>
</goals>
</execution>
<execution>
<phase>generate-resources</phase>
<id>genkey</id>
<goals>
<goal>generateKeyPair</goal>
</goals>
</execution>
</executions>
<configuration>
<keystore>${project.build.directory}/jetty-ssl.keystore</keystore>
<dname>cn=127.0.0.1</dname><!-- put your CN here -->
<keypass>dypBdX1NB3gXA0DXCy9nfyJ4jqUDlaydgbo9OU12g</keypass>
<storepass>dypBdX1NB3gXA0DXCy9nfyJ4jqUDlaydgbo9OU12g</storepass>
<alias>jetty</alias>
<keyalg>RSA</keyalg>
</configuration>
</plugin>
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>${jetty-version}</version>
<configuration>
<jettyXml>src/main/resources/jetty.xml,src/main/resources/jetty-ssl.xml,src/main/resources/jetty-https.xml</jettyXml>
</configuration>
</plugin>
embarcadero-https.xml
<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_0.dtd">
<Configure id="Server" class="org.eclipse.jetty.server.Server">
<Call id="httpsConnector" name="addConnector">
<Arg>
<New class="org.eclipse.jetty.server.ServerConnector">
<Arg name="server"><Ref refid="Server" /></Arg>
<Arg name="factories">
<Array type="org.eclipse.jetty.server.ConnectionFactory">
<Item>
<New class="org.eclipse.jetty.server.SslConnectionFactory">
<Arg name="next">http/1.1</Arg>
<Arg name="sslContextFactory"><Ref refid="sslContextFactory"/></Arg>
</New>
</Item>
<Item>
<New class="org.eclipse.jetty.server.HttpConnectionFactory">
<Arg name="config"><Ref refid="sslHttpConfig"/></Arg>
</New>
</Item>
</Array>
</Arg>
<Set name="host"><Property name="jetty.host" /></Set>
<Set name="port"><Property name="jetty.https.port" default="8443" /></Set>
<Set name="idleTimeout">30000</Set>
</New>
</Arg>
</Call>
</Configure>
embarcadero-ssl.xml
<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_0.dtd">
<!-- ============================================================= -->
<!-- Configure a TLS (SSL) Context Factory -->
<!-- This configuration must be used in conjunction with jetty.xml -->
<!-- and either jetty-https.xml or jetty-spdy.xml (but not both) -->
<!-- ============================================================= -->
<Configure id="sslContextFactory" class="org.eclipse.jetty.util.ssl.SslContextFactory">
<Set name="KeyStorePath"><Property name="jetty.home" default="." />/<Property name="jetty.keystore" default="target/jetty-ssl.keystore"/></Set>
<Set name="KeyStorePassword"><Property name="jetty.keystore.password" default="dypBdX1NB3gXA0DXCy9nfyJ4jqUDlaydgbo9OU12g"/></Set>
<Set name="KeyManagerPassword"><Property name="jetty.keymanager.password" default="dypBdX1NB3gXA0DXCy9nfyJ4jqUDlaydgbo9OU12g"/></Set>
<Set name="TrustStorePath"><Property name="jetty.home" default="." />/<Property name="jetty.truststore" default="target/jetty-ssl.keystore"/></Set>
<Set name="TrustStorePassword"><Property name="jetty.truststore.password" default="dypBdX1NB3gXA0DXCy9nfyJ4jqUDlaydgbo9OU12g"/></Set>
<Set name="EndpointIdentificationAlgorithm"></Set>
<Set name="ExcludeCipherSuites">
<Array type="String">
<Item>SSL_RSA_WITH_DES_CBC_SHA</Item>
<Item>SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA</Item>
</Array>
</Set>
<!-- =========================================================== -->
<!-- Create a TLS specific HttpConfiguration based on the -->
<!-- common HttpConfiguration defined in jetty.xml -->
<!-- Add a SecureRequestCustomizer to extract certificate and -->
<!-- session information -->
<!-- =========================================================== -->
<New id="sslHttpConfig" class="org.eclipse.jetty.server.HttpConfiguration">
<Arg><Ref refid="httpConfig"/></Arg>
<Call name="addCustomizer">
<Arg><New class="org.eclipse.jetty.server.SecureRequestCustomizer"/></Arg>
</Call>
</New>
</Configure>
jetty.xml
<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure.dtd">
<Configure id="Server" class="org.eclipse.jetty.server.Server">
<New id="httpConfig" class="org.eclipse.jetty.server.HttpConfiguration">
<Set name="secureScheme">https</Set>
<Set name="securePort">
<Property name="jetty.secure.port" default="8443" />
</Set>
</New>
</Configure>
Aquí es el único trabajo, claro paso a paso que he encontrado para embarcadero 9: http://juplo.de/configure-https-for-jetty -maven-plugin-9-0-x/# comment-53352 – mtyson