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 class org.apache.catalina.authenticator.AuthenticatorBase

      `AuthenticatorBase.AllowCorsPreflight`

    - ### 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, jaspicCallbackHandlerClass, REALM_NAME, securePagesWithPragma, secureRandomAlgorithm, secureRandomClass, secureRandomProvider, sendAuthInfoResponseHeaders, 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

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected boolean` | `doAuthenticate(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

      `allowCorsPreflightBypass, associate, authenticate, changeSessionID, checkForCachedAuthentication, doLogin, getAllowCorsPreflight, getAlwaysUseSession, getCache, getChangeSessionIdOnAuthentication, getContainer, getDisableProxyCaching, getJaspicCallbackHandlerClass, getRealmName, getRequestCertificates, getSecurePagesWithPragma, getSecureRandomAlgorithm, getSecureRandomClass, getSecureRandomProvider, invoke, isContinuationRequired, isSendAuthInfoResponseHeaders, login, logout, notify, reauthenticateFromSSO, register, register, setAllowCorsPreflight, setAlwaysUseSession, setCache, setChangeSessionIdOnAuthentication, setContainer, setDisableProxyCaching, setJaspicCallbackHandlerClass, setSecurePagesWithPragma, setSecureRandomAlgorithm, setSecureRandomClass, setSecureRandomProvider, setSendAuthInfoResponseHeaders, 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, getThrowOnFailure, init, removeLifecycleListener, setState, setState, setThrowOnFailure, 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)

    - #### doAuthenticate

          protected boolean doAuthenticate(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.
      Specified by:
        `doAuthenticate` in class `AuthenticatorBase`
      Parameters:
        `request` - Request we are processing
        `response` - Response we are creating
      Returns:
        `true` if the the user was authenticated, otherwise `false`, 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

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