Top Description Fields Constructors Methods
javax.security.jacc

public final Class WebUserDataPermission

extends Permission
Class Inheritance
Imports
java.util.HashMap, java.io.IOException, .ObjectStreamField, java.security.*, javax.servlet.http.HttpServletRequest

Class for Servlet Web user data permissions. A WebUserDataPermission is a named permission and has actions.

The name of a WebUserDataPermission (also referred to as the target name) identifies a Web resource by its context path relative URL pattern.

Authors
Ron Monzillo, Gary Ellison
See Also
java.security.Permission

Field Summary

Modifier and TypeField and Description
private static final transient String
private static final transient String
private transient int
private transient HttpMethodSpec
private static final ObjectStreamField[]
serialPersistentFields

The serialized fields of this permission are defined below.

private static final long
private static HashMap<K, V>
private static String[]
private transient int
private static int
private static int
private transient URLPatternSpec

Constructor Summary

AccessConstructor and Description
public
WebUserDataPermission(String
the URLPatternSpec that identifies the application specific web resources to which the permission pertains. All URLPatterns in the URLPatternSpec are relative to the context path of the deployed web application module, and the same URLPattern must not occur more than once in a URLPatternSpec. A null URLPatternSpec is translated to the default URLPattern, "/", by the permission constructor. All colons occuring within the URLPattern elements of the URLPatternSpec must be represented in escaped encoding as defined in RFC 2396.

name
,
String
identifies the HTTP methods and transport type to which the permission pertains. If the value passed through this parameter is null or the empty string, then the permission is constructed with actions corresponding to all the possible HTTP methods and transportType "NONE".
actions
)

Creates a new WebUserDataPermission with the specified name and actions.

public
WebUserDataPermission(String
the URLPatternSpec that identifies the application specific web resources to which the permission pertains. All URLPatterns in the URLPatternSpec are relative to the context path of the deployed web application module, and the same URLPattern must not occur more than once in a URLPatternSpec. A null URLPatternSpec is translated to the default URLPattern, "/", by the permission constructor. All colons occuring within the URLPattern elements of the URLPatternSpec must be represented in escaped encoding as defined in RFC 2396.

urlPatternSpec
,
String[]
an array of strings each element of which contains the value of an HTTP method. If the value passed through this parameter is null or is an array with no elements, then the permission is constructed with actions corresponding to all the possible HTTP methods.

HTTPMethods
,
String
a String whose value is a transportType. If the value passed through this parameter is null, then the permission is constructed with actions corresponding to transportType "NONE".
transportType
)

Creates a new WebUserDataPermission with name corresponding to the URLPatternSpec, and actions composed from the array of HTTP methods and the transport type.

public
WebUserDataPermission(HttpServletRequest
the HttpServletRequest object corresponding to the Servlet operation to which the permission pertains. The permission name is the substring of the requestURI (HttpServletRequest.getRequestURI()) that begins after the contextPath (HttpServletRequest.getContextPath()). When the substring operation yields the string "/", the permission is constructed with the empty string as its name. The constructor must transform all colon characters occuring in the name to escaped encoding as defined in RFC 2396. The HTTP method component of the permission's actions is as obtained from HttpServletRequest.getMethod(). The TransportType component of the permission's actions is determined by calling HttpServletRequest.isSecure().
request
)

Creates a new WebUserDataPermission from the HttpServletRequest object.

Method Summary

Modifier and TypeMethod and Description
public boolean

Returns:

true if the argument WebUserDataPermission object is equivalent to this WebUserDataPermission.
equals
(Object
the WebUserDataPermission object being tested for equality with this WebUserDataPermission.

o
)

Implements abstract java.security.Permission.equals.

Checks two WebUserDataPermission objects for equality.
public String

Returns:

a String containing the canonicalized actions of this WebUserDataPermission (or the null value).
getActions
()

Implements abstract java.security.Permission.getActions.

Returns a canonical String representation of the actions of this WebUserDataPermission.
private static String
getUriMinusContextPath(HttpServletRequest request)

Chops the ContextPath off the front of the requestURI to yield the servletPath + PathInfo.

public int

Returns:

the integer hash code value for this object.
hashCode
()

Implements abstract java.security.Permission.hashCode.

Returns the hash code value for this WebUserDataPermission.
public boolean

Returns:

true if the specified permission is implied by this object, false if not.
implies
(Permission
"this" WebUserDataPermission is checked to see if it implies the argument permission.

permission
)

Implements abstract java.security.Permission.implies.

Determines if the argument Permission is "implied by" this WebUserDataPermission.
private void
private void
readObject(ObjectInputStream s)

readObject reads the serialized fields from the input stream and uses them to restore the permission.

private synchronized void
writeObject(ObjectOutputStream s)

writeObject is used to establish the values of the serialized fields before they are written to the output stream and need not be implemented if the values of the serialized fields are always available and up to date.

Inherited from java.security.Permission:
checkGuardgetNamenewPermissionCollectiontoString

Field Detail

EMPTY_STRINGback to summary
private static final transient String EMPTY_STRING
ESCAPED_COLONback to summary
private static final transient String ESCAPED_COLON
hashCodeValueback to summary
private transient int hashCodeValue
methodSpecback to summary
private transient HttpMethodSpec methodSpec
serialPersistentFieldsback to summary
private static final ObjectStreamField[] serialPersistentFields

The serialized fields of this permission are defined below. Whether or not the serialized fields correspond to actual (private) fields is an implementation decision.

Serial Fields:
actions:String
the canonicalized actions string (as returned by getActions).
serialVersionUIDback to summary
private static final long serialVersionUID

Hides java.security.Permission.serialVersionUID.

transportHashback to summary
private static HashMap<K, V> transportHash
transportKeysback to summary
private static String[] transportKeys
transportTypeback to summary
private transient int transportType
TT_CONFIDENTIALback to summary
private static int TT_CONFIDENTIAL
TT_NONEback to summary
private static int TT_NONE
urlPatternSpecback to summary
private transient URLPatternSpec urlPatternSpec

Constructor Detail

WebUserDataPermissionback to summary
public WebUserDataPermission(String name, String actions)

Creates a new WebUserDataPermission with the specified name and actions.

The name contains a URLPatternSpec that identifies the web resources to which the permissions applies. The syntax of a URLPatternSpec is as follows:


         URLPatternList ::= URLPattern | URLPatternList colon URLPattern

         URLPatternSpec ::= null | URLPattern | URLPattern colon URLPatternList

A null URLPatternSpec is translated to the default URLPattern, "/", by the permission constructor. The empty string is an exact URLPattern, and may occur anywhere in a URLPatternSpec that an exact URLPattern may occur. The first URLPattern in a URLPatternSpec may be any of the pattern types, exact, path-prefix, extension, or default as defined in the Java Servlet Specification). When a URLPatternSpec includes a URLPatternList, the patterns of the URLPatternList identify the resources to which the permission does NOT apply and depend on the pattern type and value of the first pattern as follows:

  • No pattern may exist in the URLPatternList that matches the first pattern.
  • If the first pattern is a path-prefix pattern, only exact patterns matched by the first pattern and path-prefix patterns matched by, but different from, the first pattern may occur in the URLPatternList.
  • If the first pattern is an extension pattern, only exact patterns that are matched by the first pattern and path-prefix patterns may occur in the URLPatternList.
  • If the first pattern is the default pattern, "/", any pattern except the default pattern may occur in the URLPatternList.
  • If the first pattern is an exact pattern a URLPatternList must not be present in the URLPatternSpec.

The actions parameter contains a comma separated list of HTTP methods that may be followed by a transportType separated from the HTTP method by a colon.


         ExtensionMethod ::= any token as defined by RFC 2616
                 (that is, 1*[any CHAR except CTLs or separators])

         HTTPMethod ::= "Get" | "POST" | "PUT" | "DELETE" | "HEAD" |
                 "OPTIONS" | "TRACE" | ExtensionMethod

         HTTPMethodList ::= HTTPMethod | HTTPMethodList comma HTTPMethod

         HTTPMethodExceptionList ::= exclaimationPoint HTTPMethodList

         HTTPMethodSpec ::= emptyString | HTTPMethodExceptionList |
                 HTTPMethodList

         transportType ::= "INTEGRAL" | "CONFIDENTIAL" | "NONE"

         actions ::= null | HTTPMethodSpec | 
                 HTTPMethodSpec colon transportType

If duplicates occur in the HTTPMethodSpec they must be eliminated by the permission constructor.

An empty string HTTPMethodSpec is a shorthand for a List containing all the possible HTTP methods.

If the HTTPMethodSpec contains an HTTPMethodExceptionList (i.e., it begins with an exclaimationPoint), the permission pertains to all methods except those occuring in the exception list.

An actions string without a transportType is a shorthand for a actions string with the value "NONE" as its TransportType.

A granted permission representing a transportType of "NONE", indicates that the associated resources may be accessed using any conection type.

Parameters
name:String

the URLPatternSpec that identifies the application specific web resources to which the permission pertains. All URLPatterns in the URLPatternSpec are relative to the context path of the deployed web application module, and the same URLPattern must not occur more than once in a URLPatternSpec. A null URLPatternSpec is translated to the default URLPattern, "/", by the permission constructor. All colons occuring within the URLPattern elements of the URLPatternSpec must be represented in escaped encoding as defined in RFC 2396.

actions:String

identifies the HTTP methods and transport type to which the permission pertains. If the value passed through this parameter is null or the empty string, then the permission is constructed with actions corresponding to all the possible HTTP methods and transportType "NONE".

WebUserDataPermissionback to summary
public WebUserDataPermission(String urlPatternSpec, String[] HTTPMethods, String transportType)

Creates a new WebUserDataPermission with name corresponding to the URLPatternSpec, and actions composed from the array of HTTP methods and the transport type.

Parameters
urlPatternSpec:String

the URLPatternSpec that identifies the application specific web resources to which the permission pertains. All URLPatterns in the URLPatternSpec are relative to the context path of the deployed web application module, and the same URLPattern must not occur more than once in a URLPatternSpec. A null URLPatternSpec is translated to the default URLPattern, "/", by the permission constructor. All colons occuring within the URLPattern elements of the URLPatternSpec must be represented in escaped encoding as defined in RFC 2396.

HTTPMethods:String[]

an array of strings each element of which contains the value of an HTTP method. If the value passed through this parameter is null or is an array with no elements, then the permission is constructed with actions corresponding to all the possible HTTP methods.

transportType:String

a String whose value is a transportType. If the value passed through this parameter is null, then the permission is constructed with actions corresponding to transportType "NONE".

WebUserDataPermissionback to summary
public WebUserDataPermission(HttpServletRequest request)

Creates a new WebUserDataPermission from the HttpServletRequest object.

Parameters
request:HttpServletRequest

the HttpServletRequest object corresponding to the Servlet operation to which the permission pertains. The permission name is the substring of the requestURI (HttpServletRequest.getRequestURI()) that begins after the contextPath (HttpServletRequest.getContextPath()). When the substring operation yields the string "/", the permission is constructed with the empty string as its name. The constructor must transform all colon characters occuring in the name to escaped encoding as defined in RFC 2396. The HTTP method component of the permission's actions is as obtained from HttpServletRequest.getMethod(). The TransportType component of the permission's actions is determined by calling HttpServletRequest.isSecure().

Method Detail

equalsback to summary
public boolean equals(Object o)

Implements abstract java.security.Permission.equals.

Checks two WebUserDataPermission objects for equality. WebUserDataPermission objects are equivalent if their URLPatternSpec and (canonicalized) actions values are equivalent. The URLPatternSpec of a reference permission is equivalent to that of an argument permission if their first patterns are equivalent, and the patterns of the URLPatternList of the reference permission collectively match exactly the same set of patterns as are matched by the patterns of the URLPatternList of the argument permission.

Two Permission objects, P1 and P2, are equivalent if and only if P1.implies(P2) && P2.implies(P1).

Parameters
o:Object

the WebUserDataPermission object being tested for equality with this WebUserDataPermission.

Returns:boolean

true if the argument WebUserDataPermission object is equivalent to this WebUserDataPermission.

getActionsback to summary
public String getActions()

Implements abstract java.security.Permission.getActions.

Returns a canonical String representation of the actions of this WebUserDataPermission. The canonical form of the actions of a WebUserDataPermission is described by the following syntax description.


          ExtensionMethod ::= any token as defined by RFC 2616
                   (that is, 1*[any CHAR except CTLs or separators])

          HTTPMethod ::= "GET" | "POST" | "PUT" | "DELETE" | "HEAD" |
                   "OPTIONS" | "TRACE" | ExtensionMethod

          HTTPMethodList ::= HTTPMethod | HTTPMethodList comma HTTPMethod

          HTTPMethodExceptionList ::= exclaimationPoint HTTPMethodList

          HTTPMethodSpec ::= emptyString | HTTPMethodExceptionList |
                  HTTPMethodList

          transportType ::= "INTEGRAL" | "CONFIDENTIAL" | "NONE"

          actions ::= null | HTTPMethodList | 
                  HTTPMethodSpec colon transportType

 

If the permission's HTTP methods correspond to the entire HTTP method set and the permission's transport type is "INTEGRAL" or "CONFIDENTIAL", the HTTP methods shall be represented in the canonical form by an emptyString HTTPMethodSpec. If the permission's HTTP methods correspond to the entire HTTP method set, and the permission's transport type is not "INTEGRAL"or "CONFIDENTIAL", the canonical actions value shall be the null value.

If the permission's methods do not correspond to the entire HTTP method set, duplicates must be eliminated and the remaining elements must be ordered such that the predefined methods preceed the extension methods, and such that within each method classification the corresponding methods occur in ascending lexical order. The resulting (non-emptyString) HTTPMethodSpec must be included in the canonical form, and if the permission's transport type is not "INTEGRAL" or "CONFIDENTIAL", the canonical actions value must be exactly the resulting HTTPMethodSpec.

Returns:String

a String containing the canonicalized actions of this WebUserDataPermission (or the null value).

getUriMinusContextPathback to summary
private static String getUriMinusContextPath(HttpServletRequest request)

Chops the ContextPath off the front of the requestURI to yield the servletPath + PathInfo. For the special case where the servletPath + PathInfo is the pattern, "/", this routine returns the empty string.

hashCodeback to summary
public int hashCode()

Implements abstract java.security.Permission.hashCode.

Returns the hash code value for this WebUserDataPermission. The properties of the returned hash code must be as follows:

  • During the lifetime of a Java application, the hashCode method shall return the same integer value every time it is called on a WebUserDataPermission object. The value returned by hashCode for a particular EJBMethod permission need not remain consistent from one execution of an application to another.
  • If two WebUserDataPermission objects are equal according to the equals method, then calling the hashCode method on each of the two Permission objects must produce the same integer result (within an application).

Returns:int

the integer hash code value for this object.

impliesback to summary
public boolean implies(Permission permission)

Implements abstract java.security.Permission.implies.

Determines if the argument Permission is "implied by" this WebUserDataPermission. For this to be the case all of the following must be true:

  • The argument is an instanceof WebUserDataPermission.
  • The first URLPattern in the name of the argument permission is matched by the first URLPattern in the name of this permission.
  • The first URLPattern in the name of the argument permission is NOT matched by any URLPattern in the URLPatternList of the URLPatternSpec of this permission.
  • If the first URLPattern in the name of the argument permission matches the first URLPattern in the URLPatternSpec of this permission, then every URLPattern in the URLPatternList of the URLPatternSpec of this permission is matched by a URLPattern in the URLPatternList of the argument permission.
  • The HTTP methods represented by the actions of the argument permission are a subset of the HTTP methods represented by the actions of this permission.
  • The transportType in the actions of this permission either corresponds to the value "NONE", or equals the transportType in the actions of the argument permission.

URLPattern matching is performed using the Servlet matching rules where two URL patterns match if they are related as follows:

  • their pattern values are String equivalent, or
  • this pattern is the path-prefix pattern "/*", or
  • this pattern is a path-prefix pattern (that is, it starts with "/" and ends with "/*") and the argument pattern starts with the substring of this pattern, minus its last 2 characters, and the next character of the argument pattern, if there is one, is "/", or
  • this pattern is an extension pattern (that is, it starts with "*.") and the argument pattern ends with this pattern, or
  • the reference pattern is the special default pattern, "/", which matches all argument patterns.

All of the comparisons described above are case sensitive.

Parameters
permission:Permission

"this" WebUserDataPermission is checked to see if it implies the argument permission.

Returns:boolean

true if the specified permission is implied by this object, false if not.

parseActionsback to summary
private void parseActions(String actions)
readObjectback to summary
private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException

readObject reads the serialized fields from the input stream and uses them to restore the permission. This method need not be implemented if establishing the values of the serialized fields (as is done by defaultReadObject) is sufficient to initialize the permission.

writeObjectback to summary
private synchronized void writeObject(ObjectOutputStream s) throws IOException

writeObject is used to establish the values of the serialized fields before they are written to the output stream and need not be implemented if the values of the serialized fields are always available and up to date. The serialized fields are written to the output stream in the same form as they would be written by defaultWriteObject.