MongoDb Ticket Registry
MongoDb ticket registry integration is enabled by including the following dependency in the WAR overlay:
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<dependency>
<groupId>org.apereo.cas</groupId>
<artifactId>cas-server-support-mongo-ticket-registry</artifactId>
<version>${cas.version}</version>
</dependency>
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implementation "org.apereo.cas:cas-server-support-mongo-ticket-registry:${project.'cas.version'}"
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dependencyManagement {
imports {
mavenBom "org.apereo.cas:cas-server-support-bom:${project.'cas.version'}"
}
}
dependencies {
implementation "org.apereo.cas:cas-server-support-mongo-ticket-registry"
}
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dependencies {
/*
The following platform references are included automatically and are listed for reference only.
implementation enforcedPlatform("org.apereo.cas:cas-server-support-bom:${project.'cas.version'}")
implementation platform(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES)
*/
implementation "org.apereo.cas:cas-server-support-mongo-ticket-registry"
}
This registry stores tickets in one or more MongoDb instances. Tickets are auto-converted and wrapped into document objects as JSON. Special indices are created to let MongoDb handle the expiration of each document and cleanup tasks. Note that CAS generally tries to create the relevant collections automatically to manage different ticket types.
Each ticket is stored with its identifier as the document _id, so tickets are found through the index MongoDb
maintains for every collection. Earlier versions stored the identifier in a separate ticketId field with its own
IDX_ID index. At startup, CAS converts such documents in place and, when index updates are enabled, removes the
IDX_ID index. The conversion only touches documents in the earlier shape, can safely run again if interrupted, and
needs no downtime beyond the upgrade itself; all CAS nodes sharing the registry should be upgraded together, since a node
running an earlier version cannot read converted tickets. If an index CAS replaces cannot be rebuilt, CAS logs a warning
and puts the previous index back. Principal attributes are stored and indexed for ticket-granting tickets only, and
the service index exists only on collections of tickets linked to a service; CAS removes those two indexes from other
collections when it updates indexes.
Configuration
The following settings and properties are available from the CAS configuration catalog:
cas.ticket.registry.mongo.client-uriThe connection uri to the mongodb instance.
The connection uri to the mongodb instance. This typically takes on the form of mongodb://user:psw@ds135522.somewhere.com:35522/db. If not specified, will fallback onto other individual settings. If specified, takes over all other settings where applicable.
cas.ticket.registry.mongo.crypto.encryption.keyThe encryption key.
The encryption key. The encryption key by default and unless specified otherwise must be randomly-generated string whose length is defined by the encryption key size setting.
cas.ticket.registry.mongo.crypto.signing.keyThe signing key is a string whose length is defined by the signing key size setting.
The signing key is a string whose length is defined by the signing key size setting.
cas.ticket.registry.mongo.database-nameMongoDb database instance name.
MongoDb database instance name.
cas.ticket.registry.mongo.hostMongoDb database host for authentication.
localhostMongoDb database host for authentication. Multiple host addresses may be defined, separated by comma. If more than one host is defined, it is assumed that each host contains the port as well, if any. Otherwise the configuration may fallback onto the port defined.
cas.ticket.registry.mongo.passwordMongoDb database password for authentication.
MongoDb database password for authentication.
cas.ticket.registry.mongo.portMongoDb database port.
27017MongoDb database port.
cas.ticket.registry.mongo.user-idMongoDb database user for authentication.
MongoDb database user for authentication.
cas.ticket.registry.mongo.authentication-database-nameName of the database to use for authentication.
Name of the database to use for authentication.
cas.ticket.registry.mongo.crypto.algThe signing/encryption algorithm to use.
AESThe signing/encryption algorithm to use.
cas.ticket.registry.mongo.crypto.enabledWhether crypto operations are enabled.
trueWhether crypto operations are enabled.
cas.ticket.registry.mongo.crypto.encryption.key-sizeEncryption key size.
16Encryption key size.
cas.ticket.registry.mongo.crypto.signing-enabledWhether signing encryption operations are enabled.
trueWhether signing encryption operations are enabled.
cas.ticket.registry.mongo.crypto.signing.key-sizeThe signing key size.
512The signing key size.
cas.ticket.registry.mongo.drop-collectionWhether collections should be dropped on startup and re-created.
falseWhether collections should be dropped on startup and re-created.
cas.ticket.registry.mongo.drop-indexesWhen updating/creating indexes, decide if existing indexes should all be dropped once prior to creating/updating indexes.
falseWhen updating/creating indexes, decide if existing indexes should all be dropped once prior to creating/updating indexes. This may be useful to avoid conflicts between old and new indexes, in scenarios where CAS may be unable to locate the proper difference in index options or names during upgrades..
cas.ticket.registry.mongo.indexesIndex names to create.
-
IDX_ID: no longer created; ticket identifiers are stored as the document id, and an existing index by this name is removed when indexes are updated. -
IDX_PRINCIPAL: index created for principal attached to the ticket. -
IDX_EXPIRATION: index created for ticket expiration date. -
IDX_SERVICE: index created for service attached to the ticket, only on collections that hold tickets linked to a service. -
IDX_ATTRIBUTES: wildcard index created for ticket attributes, only on the ticket-granting ticket collection, the only one that stores attributes.
IDX_SERVICE and IDX_ATTRIBUTES are removed from collections where they do not apply.cas.ticket.registry.mongo.pool.idle-timeThe maximum idle time of a pooled connection.
PT5MThe maximum idle time of a pooled connection. A zero value indicates no limit to the idle time. A pooled connection that has exceeded its idle time will be closed and replaced when necessary by a new connection. Keep this below any idle timeout enforced by firewalls or load balancers between CAS and MongoDb.
cas.ticket.registry.mongo.pool.life-timeThe maximum time a pooled connection can live for.
PT30MThe maximum time a pooled connection can live for. A zero value indicates no limit to the life time. A pooled connection that has exceeded its life time will be closed and replaced when necessary by a new connection. Every replacement repeats the TLS handshake and authentication, so a short life time adds latency under load; a finite value still lets connections move to new servers after topology or DNS changes.
cas.ticket.registry.mongo.pool.max-sizeMaximum number of connections to keep around.
100Maximum number of connections to keep around. Connections are opened on demand up to this limit, and a single login makes several requests to the ticket registry.
cas.ticket.registry.mongo.pool.max-wait-timeThe maximum time that a thread may wait for a connection to become available.
PT10SThe maximum time that a thread may wait for a connection to become available. When the pool is exhausted, the request fails once this time passes rather than holding the thread.
cas.ticket.registry.mongo.pool.min-sizeMinimum number of connections to keep around.
1Minimum number of connections to keep around.
cas.ticket.registry.mongo.read-concernRead concern.
AVAILABLELOCALMAJORITYLINEARIZABLESNAPSHOTAVAILABLE
cas.ticket.registry.mongo.read-preferenceRead preference.
PRIMARYPRIMARYSECONDARYSECONDARY_PREFERREDPRIMARY_PREFERREDNEAREST
cas.ticket.registry.mongo.replica-setA replica set in MongoDB is a group of mongod processes that maintain the same data set.
A replica set in MongoDB is a group of mongod processes that maintain the same data set. Replica sets provide redundancy and high availability, and are the basis for all production deployments.
cas.ticket.registry.mongo.retry-writesSets whether writes should be retried if they fail due to a network error.
falseSets whether writes should be retried if they fail due to a network error.
cas.ticket.registry.mongo.ssl-enabledWhether connections require SSL.
falseWhether connections require SSL.
cas.ticket.registry.mongo.timeoutMongoDb database connection timeout.
PT5SMongoDb database connection timeout.
cas.ticket.registry.mongo.update-indexesWhether CAS should attempt to create/update indexes automatically and figure out the differences between existing keys and new keys.
trueWhether CAS should attempt to create/update indexes automatically and figure out the differences between existing keys and new keys.
cas.ticket.registry.mongo.write-concernWrite concern describes the level of acknowledgement requested from MongoDB for write operations to a standalone mongo db or to replica sets or to sharded clusters.
ACKNOWLEDGEDWrite concern describes the level of acknowledgement requested from MongoDB for write operations to a standalone mongo db or to replica sets or to sharded clusters. In sharded clusters, mongo db instances will pass the write concern on to the shards.
Required settings may be needed to activate or affect the feature; review them even when they have a default. Optional settings only need to be set to change a default or to turn on the behavior they control. Third party settings belong to libraries such as Spring Boot that CAS builds on; their own documentation may have more detail.
Signing & encryption
This CAS feature is able to accept signing and encryption crypto keys. In most scenarios if keys are not provided, CAS will auto-generate them. The following instructions apply if you wish to manually and beforehand create the signing and encryption keys.
Note that if you are asked to create a JWK of a certain size for the key, you are to use the following set of commands to generate the token:
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wget https://raw.githubusercontent.com/apereo/cas/master/etc/jwk-gen.jar
java -jar jwk-gen.jar -t oct -s [size]
The outcome would be similar to:
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{
"kty": "oct",
"kid": "...",
"k": "..."
}
The generated value for k needs to be assigned to the relevant CAS settings. Note that keys generated via
the above algorithm are processed by CAS using the Advanced Encryption Standard (AES) algorithm which is a
specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology.
Notes on configuration
Configuration Metadata
The collection of configuration properties listed in this section are automatically generated from the CAS source and components that contain the actual field definitions, types, descriptions, modules, etc. This metadata may not always be 100% accurate, or could be lacking details and sufficient explanations.
Be Selective
This section is meant as a guide only. Do NOT copy/paste the entire collection of settings into your CAS configuration; rather pick only the properties that you need. Do NOT enable settings unless you are certain of their purpose and do NOT copy settings into your configuration only to keep them as reference. All these ideas lead to upgrade headaches, maintenance nightmares and premature aging.
YAGNI
Note that for nearly ALL use cases, declaring and configuring properties listed here is sufficient. You should NOT have to explicitly massage a CAS XML/Java/etc configuration file to design an authentication handler, create attribute release policies, etc. CAS at runtime will auto-configure all required changes for you. If you are unsure about the meaning of a given CAS setting, do NOT turn it on without hesitation. Review the codebase or better yet, ask questions to clarify the intended behavior.
Naming Convention
Property names can be specified in very relaxed terms. For instance cas.someProperty, cas.some-property, cas.some_property are all valid names. While all
forms are accepted by CAS, there are certain components (in CAS and other frameworks used) whose activation at runtime is conditional on a property value, where
this property is required to have been specified in CAS configuration using kebab case. This is both true for properties that are owned by CAS as well as those
that might be presented to the system via an external library or framework such as Spring Boot, etc.
When possible, properties should be stored in lower-case kebab format, such as cas.property-name=value.
The only possible exception to this rule is when naming actuator endpoints; The name of the
actuator endpoints (i.e. ssoSessions) MUST remain in camelCase mode.
Settings and properties that are controlled by the CAS platform directly always begin with the prefix cas. All other settings are controlled and provided
to CAS via other underlying frameworks and may have their own schemas and syntax. BE CAREFUL with
the distinction. Unrecognized properties are rejected by CAS and/or frameworks upon which CAS depends. This means if you somehow misspell a property definition
or fail to adhere to the dot-notation syntax and such, your setting is entirely refused by CAS and likely the feature it controls will never be activated in the
way you intend.
Validation
Configuration properties are automatically validated on CAS startup to report issues with configuration binding, especially if defined CAS settings cannot be recognized or validated by the configuration schema. Additional validation processes are also handled via Configuration Metadata and property migrations applied automatically on startup by Spring Boot and family.
Indexed Settings
CAS settings able to accept multiple values are typically documented with an index, such as cas.some.setting[0]=value. The index [0] is meant to be
incremented by the adopter to allow for distinct multiple configuration blocks.
Troubleshooting
To enable additional logging, configure the log4j configuration file to add the following levels:
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...
<Logger name="com.mongo" level="debug" additivity="false">
<AppenderRef ref="casConsole"/>
<AppenderRef ref="casFile"/>
</Logger>
...