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https://issues.apache.org/jira/browse/QPID-4636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13604810#comment-13604810
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Robbie Gemmell commented on QPID-4636:
--------------------------------------
Hi Michal,
I took a look over the patch, and ended up deciding to expand on it a bit to
make the testing a bit more granular.
For the unit tests, I removed the 'app2' cert from the test broker peer store
so it only contains the 'app1' cert, allowing to test behaviour of the
QpidPeersOnlyTrustManager with a cert it wouldnt trust but which the broker
normally would otherwise (since the CA is in the broker trust store). I also
added some tests to ensure behaviour of the QpidMultipleTrustManager is as
expected when used different combinations of delegate TrustManagers.
For the systests, I removed the peer store from config-systests.json so that
the existing tests did not use it. Running with only a TrustStore configured
actually follows a slightly different codepath at times and so we should really
keep tests which only use a TrustStore to ensure that path is also tested. When
I did that I noticed that the systest you had added didnt actually fail as I
would have expected, so I altered it slightly to use the new 'unustrusted'
client keystore as the broker peerstore and showed this allowed clients using
that cert to connect, adding a further test to show that if the peerstore wasnt
in place that the client would fail to connect (thus demonstrating the
effectiveness of adding the peerstore).
The changes are at http://svn.apache.org/viewvc?view=revision&revision=1457599
if you would like to look them over.
Robbie
> SSL Client Authentication in Java broker
> ----------------------------------------
>
> Key: QPID-4636
> URL: https://issues.apache.org/jira/browse/QPID-4636
> Project: Qpid
> Issue Type: New Feature
> Components: Java Broker, Java Common
> Affects Versions: 0.21
> Reporter: Michal Zerola
> Assignee: Robbie Gemmell
> Priority: Minor
> Attachments: java_broker_peerstore.jks,
> java_client_untrusted_keystore.jks, ssl_new_trustmanager.patch,
> ssl_new_trustmanager_test_extended.patch, ssl_new_trustmanager_test.patch
>
>
> *Motivation:*
> The C++ broker implementation is based on the NSS library from Mozilla. The
> user creates a certificate database and configures the broker to load the
> database at start-up. The NSS certificate database can store the private
> keys used by the broker as well as the public keys related to the connecting
> clients. The public keys can be divided into several groups - the keys of
> trusted CAs and the keys of trusted peers. The difference between the trusted
> CA and trusted peer is that the trusted CA allows logging in even to clients
> who have a certificate signed by the CA, while the peers allow logging in
> only to clients who have the certificate exactly matching the certificate
> loaded in the certificate database.
> The SSL Client Authentication in the Java broker is based on the Java JSSE
> implementation. The certificates are stored in the JKS format. The JKS format
> doesn't distinguish between trusted peers and trusted CA. Therefore all
> public keys behave as trusted CAs. As a result, the current implementation
> cannot be used together with self signed certificates. As we found out, there
> seems to be no support for the trusted peers in the JKS truststores.
> *Proposed solution:*
> The current configuration for the SSL Client Authentication supports only one
> truststore . We can add a second configuration entry which would allow to
> specify "peerstore" . When creating the SSL context, the existing truststore
> would be handled as it is handled today. If the "peerstore" is specified, the
> new TrustManager will be added to the SSL context. The custom TrustManager
> will use the peerstore to verify the peers only as peers. The client will
> pass the authentication if it is authenticated either with the original
> Trustmanager against the keystore or by the custom trust manager against the
> peer store.
> *Configuration and patch explanation:*
> The current configuration model for the broker (trunk) is based on JSON. We
> have added two optional attributes (peerStorePath, peerStorePassword):
> {quote}
> …
> "keyStorePath": "...",
> "keyStorePassword": "123456",
> "trustStorePath": "...",
> "trustStorePassword": "123456",
> {color:red}
> "peerStorePath": "...",
> "peerStorePassword": "123456",
> {color}
> …
> {quote}
> Internally, the broker is prepared to handle multiple truststores, since it
> can store them in the collection. If the above new attributes were specified,
> the additional truststore is added into the collection (BrokerAdapter.java).
> A new truststore will have optional flag TrustStore.PEERS_ONLY set to True.
> The SSLContextFactory was extended for collection configuration. The Broker
> creates the SSLContext using the collection of truststores (either only
> single truststore or with a new peerstore). The SSLFactory parses the
> collection and depending on the TrustStore.PEERS_ONLY flag creates either
> regular JSSE trustmanager or uses a newly introduced one
> QpidPeersOnlyTrustManager.
> The new QpidPeersOnlyTrustManager works as a wrapper around standard JSSE
> trustmanager. When client connects, the check is delegated to the underlying
> JSSE verification and if it succeeds, the additional check is done, whether
> the peer’s certificate (in the chain index 0) is present in the keystore
> file. Only then the client is authenticated, otherwise the
> CertificateException is thrown.
> Since SSLContext.init method from the array of trustmanagers uses only the
> first one which is an instance of the X509TrustManager class, we have created
> also the extension. Otherwise, it would not be possible to use simultaneously
> trustmanager (JSSE implementation) and peermanager (our new implementation)
> because both implements X509TrustManager and only the first from the array
> would be considered. Therefore, we have introduced the
> QpidMultipleTrustManager which is doing nothing else but delegating the check
> to its underlying X509TrustManagers and only if all fails, the check itself
> fails. If some underlying manager succeeds, the check itself succeeds as
> well. This QpidMultipleTrustManager is loaded with truststore and peerstore
> manager and added into the array which is further passed to the
> SSLContext.init method.
> The implementation attached in the patch seems to be working fine and adds
> the above requirements for peers only truststore. It is also backwards
> compatible- anyone without interest for peerstores will not see any change.
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