org.apache.catalina.authenticator

Class DigestAuthenticator

java.lang.Object

org.apache.catalina.util.LifecycleBase

org.apache.catalina.util.LifecycleMBeanBase

org.apache.catalina.valves.ValveBase

org.apache.catalina.authenticator.AuthenticatorBase

org.apache.catalina.authenticator.DigestAuthenticator

All Implemented Interfaces:

MBeanRegistration, RegistrationListener, Authenticator, Contained, JmxEnabled, Lifecycle, Valve

public class DigestAuthenticator
extends AuthenticatorBase

An Authenticator and Valve implementation of HTTP DIGEST Authentication (see RFC 2069).

Author:

Craig R. McClanahan, Remy Maucherat

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DigestAuthenticator.DigestInfo
static class	DigestAuthenticator.NonceInfo

Nested classes/interfaces inherited from interface org.apache.catalina.Lifecycle

Lifecycle.SingleUse

Field Summary

Fields

Modifier and Type	Field and Description
protected String	key Private key.
protected long	lastTimestamp The last timestamp used to generate a nonce.
protected Object	lastTimestampLock
protected int	nonceCacheSize Maximum number of server nonces to keep in the cache.
protected int	nonceCountWindowSize The window size to use to track seen nonce count values for a given nonce.
protected Map<String,DigestAuthenticator.NonceInfo>	nonces List of server nonce values currently being tracked
protected long	nonceValidity How long server nonces are valid for in milliseconds.
protected String	opaque Opaque string.
protected static String	QOP Tomcat's DIGEST implementation only supports auth quality of protection.
protected boolean	validateUri Should the URI be validated as required by RFC2617?

Fields inherited from class org.apache.catalina.authenticator.AuthenticatorBase

alwaysUseSession, AUTH_HEADER_NAME, cache, changeSessionIdOnAuthentication, context, disableProxyCaching, REALM_NAME, securePagesWithPragma, secureRandomAlgorithm, secureRandomClass, secureRandomProvider, sessionIdGenerator, sm, sso

Fields inherited from class org.apache.catalina.valves.ValveBase

asyncSupported, container, containerLog, next

Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase

mserver

Fields inherited from interface org.apache.catalina.Lifecycle

AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT

Constructor Summary

Constructors

Constructor and Description
DigestAuthenticator()

Method Summary

Modifier and Type	Method and Description
boolean	authenticate(Request request, HttpServletResponse response) Authenticate the user making this request, based on the specified login configuration.
protected String	generateNonce(Request request) Generate a unique token.
protected String	getAuthMethod()
String	getKey()
int	getNonceCacheSize()
int	getNonceCountWindowSize()
long	getNonceValidity()
String	getOpaque()
boolean	isValidateUri()
protected static String	removeQuotes(String quotedString) Removes the quotes on a string.
protected static String	removeQuotes(String quotedString, boolean quotesRequired) Removes the quotes on a string.
protected void	setAuthenticateHeader(HttpServletRequest request, HttpServletResponse response, String nonce, boolean isNonceStale) Generates the WWW-Authenticate header.
void	setKey(String key)
void	setNonceCacheSize(int nonceCacheSize)
void	setNonceCountWindowSize(int nonceCountWindowSize)
void	setNonceValidity(long nonceValidity)
void	setOpaque(String opaque)
void	setValidateUri(boolean validateUri)
protected void	startInternal() Start this component and implement the requirements of LifecycleBase.startInternal().

Methods inherited from class org.apache.catalina.authenticator.AuthenticatorBase

associate, checkForCachedAuthentication, doLogin, getAlwaysUseSession, getCache, getChangeSessionIdOnAuthentication, getContainer, getDisableProxyCaching, getRealmName, getRequestCertificates, getSecurePagesWithPragma, getSecureRandomAlgorithm, getSecureRandomClass, getSecureRandomProvider, invoke, login, logout, notify, reauthenticateFromSSO, register, setAlwaysUseSession, setCache, setChangeSessionIdOnAuthentication, setContainer, setDisableProxyCaching, setSecurePagesWithPragma, setSecureRandomAlgorithm, setSecureRandomClass, setSecureRandomProvider, stopInternal

Methods inherited from class org.apache.catalina.valves.ValveBase

backgroundProcess, getDomainInternal, getNext, getObjectNameKeyProperties, initInternal, isAsyncSupported, setAsyncSupported, setNext, toString

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister

Methods inherited from class org.apache.catalina.util.LifecycleBase

addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

QOP

protected static final String QOP

Tomcat's DIGEST implementation only supports auth quality of protection.

See Also:

Constant Field Values

nonces

protected Map<String,DigestAuthenticator.NonceInfo> nonces

List of server nonce values currently being tracked

lastTimestamp

protected long lastTimestamp

The last timestamp used to generate a nonce. Each nonce should get a unique timestamp.

lastTimestampLock

protected final Object lastTimestampLock

nonceCacheSize

protected int nonceCacheSize

Maximum number of server nonces to keep in the cache. If not specified, the default value of 1000 is used.

nonceCountWindowSize

protected int nonceCountWindowSize

The window size to use to track seen nonce count values for a given nonce. If not specified, the default of 100 is used.

key

protected String key

Private key.

nonceValidity

protected long nonceValidity

How long server nonces are valid for in milliseconds. Defaults to 5 minutes.

opaque

protected String opaque

Opaque string.

validateUri

protected boolean validateUri

Should the URI be validated as required by RFC2617? Can be disabled in reverse proxies where the proxy has modified the URI.

Constructor Detail

DigestAuthenticator

public DigestAuthenticator()

Method Detail

getNonceCountWindowSize

public int getNonceCountWindowSize()

setNonceCountWindowSize

public void setNonceCountWindowSize(int nonceCountWindowSize)

getNonceCacheSize

public int getNonceCacheSize()

setNonceCacheSize

public void setNonceCacheSize(int nonceCacheSize)

getKey

public String getKey()

setKey

public void setKey(String key)

getNonceValidity

public long getNonceValidity()

setNonceValidity

public void setNonceValidity(long nonceValidity)

getOpaque

public String getOpaque()

setOpaque

public void setOpaque(String opaque)

isValidateUri

public boolean isValidateUri()

setValidateUri

public void setValidateUri(boolean validateUri)

authenticate

public boolean authenticate(Request request,
                            HttpServletResponse response)
                     throws IOException

Authenticate the user making this request, based on the specified login configuration. Return true if any specified constraint has been satisfied, or false if we have created a response challenge already.

Parameters:

request - Request we are processing

response - Response we are creating

Returns:

true if any specified constraints have been satisfied, or false if one more constraints were not satisfied (in which case an authentication challenge will have been written to the response).

Throws:

IOException - if an input/output error occurs

getAuthMethod

protected String getAuthMethod()

Specified by:

getAuthMethod in class AuthenticatorBase

removeQuotes

protected static String removeQuotes(String quotedString,
                                     boolean quotesRequired)

Removes the quotes on a string. RFC2617 states quotes are optional for all parameters except realm.

Parameters:

quotedString - The quoted string

quotesRequired - true if quotes were required

Returns:

The unquoted string

removeQuotes

protected static String removeQuotes(String quotedString)

Removes the quotes on a string.

Parameters:

quotedString - The quoted string

Returns:

The unquoted string

generateNonce

protected String generateNonce(Request request)

Generate a unique token. The token is generated according to the following pattern. NOnceToken = Base64 ( MD5 ( client-IP ":" time-stamp ":" private-key ) ).

Parameters:

request - HTTP Servlet request

Returns:

The generated nonce

setAuthenticateHeader

protected void setAuthenticateHeader(HttpServletRequest request,
                                     HttpServletResponse response,
                                     String nonce,
                                     boolean isNonceStale)

Generates the WWW-Authenticate header.

The header MUST follow this template :

      WWW-Authenticate    = "WWW-Authenticate" ":" "Digest"
                            digest-challenge

      digest-challenge    = 1#( realm | [ domain ] | nonce |
                  [ digest-opaque ] |[ stale ] | [ algorithm ] )

      realm               = "realm" "=" realm-value
      realm-value         = quoted-string
      domain              = "domain" "=" <"> 1#URI <">
      nonce               = "nonce" "=" nonce-value
      nonce-value         = quoted-string
      opaque              = "opaque" "=" quoted-string
      stale               = "stale" "=" ( "true" | "false" )
      algorithm           = "algorithm" "=" ( "MD5" | token )
 

Parameters:

request - HTTP Servlet request

response - HTTP Servlet response

nonce - nonce token

isNonceStale - true to add a stale parameter

startInternal

protected void startInternal()
                      throws LifecycleException

Description copied from class: AuthenticatorBase

Start this component and implement the requirements of LifecycleBase.startInternal().

Overrides:

startInternal in class AuthenticatorBase

Throws:

LifecycleException - if this component detects a fatal error that prevents this component from being used