WORKERS AHEAD!
You are viewing the development documentation for the Apereo CAS server. The functionality presented here is not officially released yet. This is a work in progress and will be continually updated as development moves forward. You are most encouraged to test the changes presented.
Redis YubiKey Registration
Support is enabled by including the following dependencies in the WAR overlay:
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<dependency>
<groupId>org.apereo.cas</groupId>
<artifactId>cas-server-support-yubikey-redis</artifactId>
<version>${cas.version}</version>
</dependency>
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implementation "org.apereo.cas:cas-server-support-yubikey-redis:${project.'cas.version'}"
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dependencyManagement {
imports {
mavenBom "org.apereo.cas:cas-server-support-bom:${project.'cas.version'}"
}
}
dependencies {
implementation "org.apereo.cas:cas-server-support-yubikey-redis"
}
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dependencies {
/*
The following platform references should be included automatically and are listed here for reference only.
implementation enforcedPlatform("org.apereo.cas:cas-server-support-bom:${project.'cas.version'}")
implementation platform(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES)
*/
implementation "org.apereo.cas:cas-server-support-yubikey-redis"
}
The following settings and properties are available from the CAS configuration catalog:
cas.authn.mfa.yubikey.redis.cluster.nodes[0].host=
Server's host address.
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cas.authn.mfa.yubikey.redis.cluster.nodes[0].port=
Server's port number.
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cas.authn.mfa.yubikey.redis.cluster.nodes[0].replica-of=
Set the id of the master node.
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cas.authn.mfa.yubikey.redis.cluster.nodes[0].type=
Indicate the type/role of this node.
Accepted values are:
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cas.authn.mfa.yubikey.redis.cluster.password=
The cluster connection's password.
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cas.authn.mfa.yubikey.redis.cluster.username=
The cluster connection's username.
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cas.authn.mfa.yubikey.redis.pool.enabled=false
Enable the pooling configuration.
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cas.authn.mfa.yubikey.redis.sentinel.master=
Name of Redis server.
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cas.authn.mfa.yubikey.redis.database=0
Database index used by the connection factory.
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cas.authn.mfa.yubikey.redis.enabled=true
Whether the module is enabled or not, defaults to true.
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cas.authn.mfa.yubikey.redis.host=localhost
Redis server host.
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cas.authn.mfa.yubikey.redis.password=
Login password of the redis server.
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cas.authn.mfa.yubikey.redis.port=6379
Redis server port.
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cas.authn.mfa.yubikey.redis.username=
Login username of the redis server.
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cas.authn.mfa.yubikey.redis.cluster.dynamic-refresh-sources=true
Whether to discover and query all cluster nodes for obtaining the cluster topology. When set to false, only the initial seed nodes are used as sources for topology discovery.
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cas.authn.mfa.yubikey.redis.cluster.max-redirects=0
The max number of redirects to follow.
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cas.authn.mfa.yubikey.redis.cluster.nodes=
List of nodes available in the redis cluster.
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cas.authn.mfa.yubikey.redis.cluster.nodes[0].id=
Identifier of this node.
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cas.authn.mfa.yubikey.redis.cluster.nodes[0].name=
Name of this node.
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cas.authn.mfa.yubikey.redis.cluster.topology-refresh-period=
Enables periodic refresh of cluster topology and sets the refresh period. This settings supports the
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cas.authn.mfa.yubikey.redis.pool.fairness=false
Returns whether or not the pool serves threads waiting to borrow objects fairly. True means that waiting threads are served as if waiting in a FIFO queue.
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cas.authn.mfa.yubikey.redis.pool.lifo=true
Returns whether the pool has LIFO (last in, first out) behaviour with respect to idle objects - always returning the most recently used object from the pool, or as a FIFO (first in, first out) queue, where the pool always returns the oldest object in the idle object pool.
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cas.authn.mfa.yubikey.redis.pool.max-active=8
Max number of connections that can be allocated by the pool at a given time. Use a negative value for no limit.
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cas.authn.mfa.yubikey.redis.pool.max-idle=8
Max number of "idle" connections in the pool. Use a negative value to indicate an unlimited number of idle connections.
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cas.authn.mfa.yubikey.redis.pool.max-wait=PT5S
Maximum amount of time (in milliseconds) a connection allocation should block before throwing an exception when the pool is exhausted. Use a negative value to block indefinitely. This settings supports the
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cas.authn.mfa.yubikey.redis.pool.min-evictable-idle-time-millis=0
Sets the minimum amount of time an object may sit idle in the pool before it is eligible for eviction by the idle object evictor (if any - see setTimeBetweenEvictionRunsMillis(long)). When non-positive, no objects will be evicted from the pool due to idle time alone.
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cas.authn.mfa.yubikey.redis.pool.min-idle=0
Target for the minimum number of idle connections to maintain in the pool. This setting only has an effect if it is positive.
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cas.authn.mfa.yubikey.redis.pool.num-tests-per-eviction-run=0
Sets the maximum number of objects to examine during each run (if any) of the idle object evictor thread. When positive, the number of tests performed for a run will be the minimum of the configured value and the number of idle instances in the pool. When negative, the number of tests performed will be ceil(getNumIdle()/ abs(getNumTestsPerEvictionRun())) which means that when the value is -n roughly one nth of the idle objects will be tested per run.
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cas.authn.mfa.yubikey.redis.pool.soft-min-evictable-idle-time-millis=0
Sets the minimum amount of time an object may sit idle in the pool before it is eligible for eviction by the idle object evictor (if any - see setTimeBetweenEvictionRunsMillis(long)), with the extra condition that at least minIdle object instances remain in the pool. This setting is overridden by getMinEvictableIdleTimeMillis() (that is, if getMinEvictableIdleTimeMillis() is positive, then getSoftMinEvictableIdleTimeMillis() is ignored).
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cas.authn.mfa.yubikey.redis.pool.test-on-borrow=false
Returns whether objects borrowed from the pool will be validated before being returned from the borrowObject() method. Validation is performed by the validateObject() method of the factory associated with the pool. If the object fails to validate, it will be removed from the pool and destroyed, and a new attempt will be made to borrow an object from the pool.
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cas.authn.mfa.yubikey.redis.pool.test-on-create=false
Returns whether objects created for the pool will be validated before being returned from the borrowObject() method. Validation is performed by the validateObject() method of the factory associated with the pool. If the object fails to validate, then borrowObject() will fail.
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cas.authn.mfa.yubikey.redis.pool.test-on-return=false
Returns whether objects borrowed from the pool will be validated when they are returned to the pool via the returnObject() method. Validation is performed by the validateObject() method of the factory associated with the pool. Returning objects that fail validation are destroyed rather then being returned the pool.
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cas.authn.mfa.yubikey.redis.pool.test-while-idle=false
Returns whether objects sitting idle in the pool will be validated by the idle object evictor ( if any - see setTimeBetweenEvictionRunsMillis(long)). Validation is performed by the validateObject() method of the factory associated with the pool. If the object fails to validate, it will be removed from the pool and destroyed.
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cas.authn.mfa.yubikey.redis.pool.time-between-eviction-runs-millis=-1
Sets the amount of time (in milliseconds) between runs of the idle object evictor thread. When non-positive, no idle object evictor thread will be run. If positive, the idle object evictor thread will run at least once every timeBetweenEvictionRunsMillis milliseconds, and will attempt to evict objects from the pool that are idle longer than getMinEvictableIdleTimeMillis() (if positive) or getSoftMinEvictableIdleTimeMillis() (if positive).
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cas.authn.mfa.yubikey.redis.sentinel.node=
list of host:port pairs.
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cas.authn.mfa.yubikey.redis.sentinel.password=
Login password of the sentinel server.
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cas.authn.mfa.yubikey.redis.certificate-file=
May be used when making SSL connections to build the trust manager. Sets the certificate file to use for client authentication. This is typically an
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cas.authn.mfa.yubikey.redis.connect-timeout=PT10S
Connection timeout. This settings supports the
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cas.authn.mfa.yubikey.redis.keep-alive-count=0
The maximum number of keepalive probes TCP should send before dropping the connection. By default, leaving this number at zero disables keepalive.
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cas.authn.mfa.yubikey.redis.keep-alive-idle-timeout=PT2H
The time the connection needs to remain idle before TCP starts sending keepalive probes if keepalive is enabled. This settings supports the
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cas.authn.mfa.yubikey.redis.keep-alive-interval=PT60S
The time the connection needs to remain idle before TCP starts sending keepalive probes. This settings supports the
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cas.authn.mfa.yubikey.redis.key-certificate-chain-file=
May be used when making SSL connections to build the key manager. Sets the key certificate file to use for client authentication. This is typically an
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cas.authn.mfa.yubikey.redis.key-file=
May be used when making SSL connections. Sets the key file for client authentication. The key is reloaded on each connection attempt that allows CAS to replace certificates during runtime. This is typically a
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cas.authn.mfa.yubikey.redis.key-password=
The password of the
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cas.authn.mfa.yubikey.redis.protocol-version=RESP3
Redis protocol version.
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cas.authn.mfa.yubikey.redis.read-from=
Setting that describes how Lettuce routes read operations to replica nodes. Note that modes referencing MASTER/SLAVE are deprecated (but still supported) in the Lettuce redis client dependency so migrate config to UPSTREAM/REPLICA. Available values are as follows:
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cas.authn.mfa.yubikey.redis.share-native-connections=
The shared native connection is never closed by Lettuce connection, therefore it is not validated by default when connections are retrieved. If this setting is
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cas.authn.mfa.yubikey.redis.start-tls=false
Start mutual TLS. In order to support TLS, Redis should be configured with a X.509 certificate and a private key. In addition, it is necessary to specify a CA certificate bundle file or path to be used as a trusted root when validating certificates.
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cas.authn.mfa.yubikey.redis.timeout=PT60S
Command timeout. This settings supports the
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cas.authn.mfa.yubikey.redis.uri=
Database URI.
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cas.authn.mfa.yubikey.redis.use-ssl=false
Whether or not to use SSL for connection factory.
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cas.authn.mfa.yubikey.redis.verify-peer=true
Control how peer verification is handled with redis connections. Peer verification is a security feature that checks if the host you're connecting to is who it says it is. This is often done by checking a digital certificate.
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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.