SHRINE utilizes a Java keystore to house certificates to support TLS-based https.
To Generate a New Keystore
To generate a new keystore, run the following command (on one line) within the /opt/shrine/ directory. Please use your own values wherever you see $variables.
Most importantly, ensure that $KEYSTORE_ALIAS matches the publicly-accessible hostname of the machine that will be using this keystore.
$ keytool -genkeypair -keysize 2048 -alias $KEYSTORE_ALIAS -dname "CN=$KEYSTORE_ALIAS, OU=$KEYSTORE_HUMAN, O=SHRINE Network, L=$KEYSTORE_CITY, S=$KEYSTORE_STATE, C=$KEYSTORE_COUNTRY" -keyalg RSA -keypass $KEYSTORE_PASSWORD -storepass $KEYSTORE_PASSWORD -keystore $KEYSTORE_FILE -storetype pkcs12 -validity 7300
For example, a sample site might run this:
$ keytool -genkeypair -keysize 2048 -alias shrine-example.harvard.edu -dname "CN=shrine-example.harvard.edu, OU=SHRINE Example, O=SHRINE Network, L=Boston, S=MA, C=US" -keyalg RSA -keypass password -storepass password -keystore shrine.keystore -storetype pkcs12 -validity 7300
This will generate a shrine.keystore file within the /opt/shrine directory. You can then verify the creation of the keystore by running:
$ keytool -list -keystore shrine.keystore -storepass password
You used keytool to create a new keystore - but you have not yet created any certificates.
Using a Third-Party-Signed Certificate for Serving https Requests in Tomcat.
This wiki does not attempt to cover any vendor-specific processes or output files, because those can vary over time and across industry. It is up to each remote site that chooses this option to work with its vendor on any necessary technical details.
This guide also assumes the possibility that a site may initially opt for network CA-signed certificate, but later switch over to a third-party certificate. For all examples used in our illustration below this guide uses a fictitious remote site called shrine.example.edu.
First generate a certificate signing request (CSR) using a private key, and to send that CSR to an SSL/TLS vendor such as InCommon or Symantec. This step can be performed using either openssl or keytool. The vendor will in turn generate a certificate for the requested fully-qualified domain name (FQDN), and it may provide additional certificates for its root and intermediate CAs. The remote site should work with the vendor to concatenate all certificates together into one file, so that it would be possible to trace the chain of trust from the endpoint certificate all the way back to the root CA.
Next ensure that the private key that was used to generate the CSR in a separate file. If a utility such as openssl was used to generate the CSR, then a file containing the private key should already be present and this step is unnecessary. If, however, the site used keytool to generate the CSR, then the following commands should be run to extract the private key from the keystore into a separate file. Execute the following commands to extract the private key into a file called private_key.pem (the command below assumes that the keystore is called shrine.keystore):
$ keytool -importkeystore -srckeystore shrine.keystore -srcstorepass <source_keystore_password> -srcalias shrine.example.edu -destalias shrine.example.edu -destkeystore shrine.keystore.p12 -deststoretype PKCS12 -deststorepass <destination_keystore_password> $ openssl pkcs12 -in shrine.keystore.p12 -nodes -nocerts -out private_key.pem
This private key should be guarded carefully. Ideal places include an encrypted disk volume and non-persistent, RAM-based disk (such as /dev/shm in CentOS or Debian). The key can also be stored in an offline and physically secure location.
Next, upon receiving the signed certificate from the third-party CA, the remote site should then bundle the private key with the chained certificates into a PKCS12 file (.pfx or .p12 suffix) so that SHRINE can verify the chain of trust from the endpoint certificate all the way back to the root CA. Without this trust verification, SHRINE will be unable to use the certificates as intended. For our purpose, the PKCS#12 file format is ideal because it can combine a private key with all corresponding chained certificates into a single entry in the file, and because the format is accessible by both openssl and keytool. In the following command (again, assuming that the private key file is called private_key.pem), the certificates_file contains the new endpoint certificate plus all intermediate certificates plus the root certificate, and the ca_file contains only the intermediate certificates plus the root certificate.
Run this command to bundle the private key, the endpoint certificate, and all intermediate and root certificates into one single entry within the PKCS12 store:
$ openssl pkcs12 -export -in <certificates_file> -inkey private_key.pem -out shrine.keystore.p12.temp -name shrine.example.edu-https -CAfile <ca_file> -chain -password pass:<your_pkcs12_file_password>
Note here that the value of the -name field is "shrine.example.edu-https".
The newly constructed PKCS12 file should now be imported into the original shrine.keystore. Execute the following command, and if prompted to overwrite existing entry, answer "yes":
$ keytool -importkeystore -srckeystore shrine.keystore.p12.temp -srcstoretype pkcs12 -srcstorepass <your_pkcs12_file_password> -srcalias shrine.example.edu-https -destkeystore shrine.keystore -deststoretype jks -deststorepass <your_destination_keystore_password> -destalias shrine.example.edu-https
Once the import is completed, your shrine.keystore should now look like this:
Keystore type: jks Keystore provider: SUN Your keystore contains 1 entry shrine.example.edu-https, Jul 31, 2019, PrivateKeyEntry, Certificate fingerprint (SHA1): EF:AF:5E:D3:1A:97:AA:F2:6D:50:B8:9A:23:98:B5:2C:0C:18:C3:4B
Next, configure the alias entry in Tomcat's server.xml to point to the newly imported, third-party-generated certificate:
<Connector port="6443" protocol="org.apache.coyote.http11.Http11NioProtocol"
maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
clientAuth="false" sslProtocol="TLS"
keystoreFile="/opt/shrine/shrine.keystore"
keystorePass="xxxxxxxxxx"
keyAlias="shrine.example.edu-https"/>
Once all configuration files have been updated, restart Tomcat. If everything has been configured properly, you should no longer see any warning messages from your browser regarding untrusted certificates when accessing your SHRINE host.
Here's a sample server.xml file (note the 'Connector port = "6443"' section):
server.xml
<?xml version='1.0' encoding='utf-8'?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You 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.
-->
<!-- Note: A "Server" is not itself a "Container", so you may not
define subcomponents such as "Valves" at this level.
Documentation at /docs/config/server.html
-->
<Server port="8005" shutdown="SHUTDOWN">
<Listener className="org.apache.catalina.startup.VersionLoggerListener" />
<!-- Security listener. Documentation at /docs/config/listeners.html
<Listener className="org.apache.catalina.security.SecurityListener" />
-->
<!--APR library loader. Documentation at /docs/apr.html -->
<Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
<!-- Prevent memory leaks due to use of particular java/javax APIs-->
<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
<Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
<!-- Global JNDI resources
Documentation at /docs/jndi-resources-howto.html
-->
<GlobalNamingResources>
<!-- Editable user database that can also be used by
UserDatabaseRealm to authenticate users
-->
<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved"
factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml" />
</GlobalNamingResources>
<!-- A "Service" is a collection of one or more "Connectors" that share
a single "Container" Note: A "Service" is not itself a "Container",
so you may not define subcomponents such as "Valves" at this level.
Documentation at /docs/config/service.html
-->
<Service name="Catalina">
<!--The connectors can use a shared executor, you can define one or more named thread pools-->
<!--
<Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
maxThreads="150" minSpareThreads="4"/>
-->
<!-- A "Connector" represents an endpoint by which requests are received
and responses are returned. Documentation at :
Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
Java AJP Connector: /docs/config/ajp.html
APR (HTTP/AJP) Connector: /docs/apr.html
Define a non-SSL/TLS HTTP/1.1 Connector on port 8080
-->
<Connector port="6060" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="6443" />
<!-- A "Connector" using the shared thread pool-->
<!--
<Connector executor="tomcatThreadPool"
port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
-->
<!-- Define a SSL/TLS HTTP/1.1 Connector on port 8443
This connector uses the NIO implementation that requires the JSSE
style configuration. When using the APR/native implementation, the
OpenSSL style configuration is required as described in the APR/native
documentation -->
<Connector port="6443" protocol="org.apache.coyote.http11.Http11NioProtocol"
maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
clientAuth="false" sslProtocol="TLS"
keystoreFile="/opt/shrine/shrine.keystore"
keystorePass="password"
keyAlias="<name_of_keystore_PrivateKeyEntry>"
/>
<!-- Define an AJP 1.3 Connector on port 8009 -->
<Connector port="6009" protocol="AJP/1.3" redirectPort="8443" />
<!-- An Engine represents the entry point (within Catalina) that processes
every request. The Engine implementation for Tomcat stand alone
analyzes the HTTP headers included with the request, and passes them
on to the appropriate Host (virtual host).
Documentation at /docs/config/engine.html -->
<!-- You should set jvmRoute to support load-balancing via AJP ie :
<Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">
-->
<Engine name="Catalina" defaultHost="localhost">
<!--For clustering, please take a look at documentation at:
/docs/cluster-howto.html (simple how to)
/docs/config/cluster.html (reference documentation) -->
<!--
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
-->
<!-- Use the LockOutRealm to prevent attempts to guess user passwords
via a brute-force attack -->
<Realm className="org.apache.catalina.realm.LockOutRealm">
<!-- This Realm uses the UserDatabase configured in the global JNDI
resources under the key "UserDatabase". Any edits
that are performed against this UserDatabase are immediately
available for use by the Realm. -->
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
</Realm>
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.rewrite.RewriteValve" />
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn" />
-->
<!-- Access log processes all example.
Documentation at: /docs/config/valve.html
Note: The pattern used is equivalent to using pattern="common" -->
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log" suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
</Host>
</Engine>
</Service>
</Server>
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