Package org.apache.catalina

Interface Realm

All Superinterfaces:

Contained

All Known Implementing Classes:

AuthenticatedUserRealm, CombinedRealm, DataSourceRealm, JAASMemoryLoginModule, JAASRealm, JNDIRealm, LockOutRealm, MemoryRealm, NullRealm, RealmBase, UserDatabaseRealm

public interface Realm
extends Contained

A Realm is a read-only facade for an underlying security realm used to authenticate individual users, and identify the security roles associated with those users. Realms can be attached at any Container level, but will typically only be attached to a Context, or higher level, Container.

Author:

Craig R. McClanahan

Method Summary

Modifier and Type	Method	Description
void	addPropertyChangeListener(PropertyChangeListener listener)	Add a property change listener to this component.
Principal	authenticate(String username)	Try to authenticate with the specified username.
Principal	authenticate(String username, String credentials)	Try to authenticate using the specified username and credentials.
Principal	authenticate(String username, String digest, String nonce, String nc, String cnonce, String qop, String realm, String digestA2)	Deprecated. Unused.
default Principal	authenticate(String username, String digest, String nonce, String nc, String cnonce, String qop, String realm, String digestA2, String algorithm)	Try to authenticate with the specified username, which matches the digest calculated using the given parameters using the method described in RFC 7616.
Principal	authenticate(X509Certificate[] certs)	Try to authenticate using a chain of X509Certificates.
Principal	authenticate(GSSContext gssContext, boolean storeCreds)	Try to authenticate using a GSSContext.
Principal	authenticate(GSSName gssName, GSSCredential gssCredential)	Try to authenticate using a GSSName.
void	backgroundProcess()	Execute a periodic task, such as reloading, etc.
SecurityConstraint[]	findSecurityConstraints(Request request, Context context)	Find the SecurityConstraints configured to guard the request URI for this request.
CredentialHandler	getCredentialHandler()
boolean	hasResourcePermission(Request request, Response response, SecurityConstraint[] constraint, Context context)	Perform access control based on the specified authorization constraint.
boolean	hasRole(Wrapper wrapper, Principal principal, String role)	Check if the specified Principal has the specified security role, within the context of this Realm.
boolean	hasUserDataPermission(Request request, Response response, SecurityConstraint[] constraint)	Enforce any user data constraint required by the security constraint guarding this request URI.
default boolean	isAvailable()	Return the availability of the realm for authentication.
void	removePropertyChangeListener(PropertyChangeListener listener)	Remove a property change listener from this component.
void	setCredentialHandler(CredentialHandler credentialHandler)	Set the CredentialHandler to be used by this Realm.

Methods inherited from interface org.apache.catalina.Contained

getContainer, setContainer

Method Details

getCredentialHandler

CredentialHandler getCredentialHandler()

Returns:

the CredentialHandler configured for this Realm.

setCredentialHandler

void setCredentialHandler(CredentialHandler credentialHandler)

Set the CredentialHandler to be used by this Realm.

Parameters:

credentialHandler - the CredentialHandler to use

addPropertyChangeListener

void addPropertyChangeListener(PropertyChangeListener listener)

Add a property change listener to this component.

Parameters:

listener - The listener to add

authenticate

Principal authenticate(String username)

Try to authenticate with the specified username.

Parameters:

username - Username of the Principal to look up

Returns:

the associated principal, or null if none is associated.

authenticate

Principal authenticate(String username,
 String credentials)

Try to authenticate using the specified username and credentials.

Parameters:

username - Username of the Principal to look up

credentials - Password or other credentials to use in authenticating this username

Returns:

the associated principal, or null if there is none

authenticate

@Deprecated
Principal authenticate(String username,
 String digest,
 String nonce,
 String nc,
 String cnonce,
 String qop,
 String realm,
 String digestA2)

Deprecated.

Unused. Use authenticate(String, String, String, String, String, String, String, String, String). Will be removed in Tomcat 11.

Try to authenticate with the specified username, which matches the digest calculated using the given parameters using the method described in RFC 2617 (which is a superset of RFC 2069).

Parameters:

username - Username of the Principal to look up

digest - Digest which has been submitted by the client

nonce - Unique (or supposedly unique) token which has been used for this request

nc - the nonce counter

cnonce - the client chosen nonce

qop - the "quality of protection" (nc and cnonce will only be used, if qop is not null).

realm - Realm name

digestA2 - Second digest calculated as digest(Method + ":" + uri)

Returns:

the associated principal, or null if there is none.

authenticate

default Principal authenticate(String username,
 String digest,
 String nonce,
 String nc,
 String cnonce,
 String qop,
 String realm,
 String digestA2,
 String algorithm)

Try to authenticate with the specified username, which matches the digest calculated using the given parameters using the method described in RFC 7616.

The default implementation calls authenticate(String, String, String, String, String, String, String, String) for backwards compatibility which effectively forces the use of MD5 regardless of the algorithm specified in the call to this method.

Implementations are expected to override the default implementation and take account of the algorithm parameter.

Parameters:

username - Username of the Principal to look up

digest - Digest which has been submitted by the client

nonce - Unique (or supposedly unique) token which has been used for this request

nc - the nonce counter

cnonce - the client chosen nonce

qop - the "quality of protection" (nc and cnonce will only be used, if qop is not null).

realm - Realm name

digestA2 - Second digest calculated as digest(Method + ":" + uri)

algorithm - The message digest algorithm to use

Returns:

the associated principal, or null if there is none.

authenticate

Principal authenticate(GSSContext gssContext,
 boolean storeCreds)

Try to authenticate using a GSSContext.

Parameters:

gssContext - The gssContext processed by the Authenticator.

storeCreds - Should the realm attempt to store the delegated credentials in the returned Principal?

Returns:

the associated principal, or null if there is none

authenticate

Principal authenticate(GSSName gssName,
 GSSCredential gssCredential)

Try to authenticate using a GSSName.

Parameters:

gssName - The GSSName of the principal to look up

gssCredential - The GSSCredential of the principal, may be null

Returns:

the associated principal, or null if there is none

authenticate

Principal authenticate(X509Certificate[] certs)

Try to authenticate using a chain of X509Certificates.

Parameters:

certs - Array of client certificates, with the first one in the array being the certificate of the client itself.

Returns:

the associated principal, or null if there is none

backgroundProcess

void backgroundProcess()

Execute a periodic task, such as reloading, etc. This method will be invoked inside the classloading context of this container. Unexpected throwables will be caught and logged.

findSecurityConstraints

SecurityConstraint[] findSecurityConstraints(Request request,
 Context context)

Find the SecurityConstraints configured to guard the request URI for this request.

Parameters:

request - Request we are processing

context - Context the Request is mapped to

Returns:

the configured SecurityConstraint, or null if there is none

hasResourcePermission

boolean hasResourcePermission(Request request,
 Response response,
 SecurityConstraint[] constraint,
 Context context)
                       throws IOException

Perform access control based on the specified authorization constraint.

Parameters:

request - Request we are processing

response - Response we are creating

constraint - Security constraint we are enforcing

context - The Context to which client of this class is attached.

Returns:

true if this constraint is satisfied and processing should continue, or false otherwise

Throws:

IOException - if an input/output error occurs

hasRole

boolean hasRole(Wrapper wrapper,
 Principal principal,
 String role)

Check if the specified Principal has the specified security role, within the context of this Realm.

Parameters:

wrapper - wrapper context for evaluating role

principal - Principal for whom the role is to be checked

role - Security role to be checked

Returns:

true if the specified Principal has the specified security role, within the context of this Realm; otherwise return false.

hasUserDataPermission

boolean hasUserDataPermission(Request request,
 Response response,
 SecurityConstraint[] constraint)
                       throws IOException

Enforce any user data constraint required by the security constraint guarding this request URI.

Parameters:

request - Request we are processing

response - Response we are creating

constraint - Security constraint being checked

Returns:

true if this constraint was not violated and processing should continue, or false if we have created a response already.

Throws:

IOException - if an input/output error occurs

removePropertyChangeListener

void removePropertyChangeListener(PropertyChangeListener listener)

Remove a property change listener from this component.

Parameters:

listener - The listener to remove

isAvailable

default boolean isAvailable()

Return the availability of the realm for authentication.

Returns:

true if the realm is able to perform authentication