javax.security.jacc

Class WebUserDataPermission

java.lang.Object

java.security.Permission

javax.security.jacc.WebUserDataPermission

All Implemented Interfaces:

Serializable, Guard

public final class WebUserDataPermission
extends Permission
implements Serializable

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.

Author:

Scott Stark, Anil Saldhana, Stefan Guilhen

See Also:

Permission, Serialized Form

Constructor Summary

Constructors

Constructor and Description
WebUserDataPermission(HttpServletRequest request) Creates a new WebUserDataPermission from the HttpServletRequest object.
WebUserDataPermission(String name, String actions) Creates a new WebUserDataPermission with the specified name and actions.
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.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object p) Checks two WebUserDataPermission objects for equality.
String	getActions() Returns a canonical String representation of the actions of this WebUserDataPermission.
int	hashCode() Returns the hash code value for this WebUserDataPermission.
boolean	implies(Permission p) Determines if the argument Permission is "implied by" this WebUserDataPermission.

Methods inherited from class java.security.Permission

checkGuard, getName, newPermissionCollection, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

WebUserDataPermission

public WebUserDataPermission(HttpServletRequest request)

Creates a new WebUserDataPermission from the HttpServletRequest object.

Parameters:

request - - 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 occurring 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().

WebUserDataPermission

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 exclamation point),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 connection type.

Parameters:

name - - 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 occurring within the URLPattern elements of the URLPatternSpec must be represented in escaped encoding as defined in RFC 2396.

actions - - 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".

WebUserDataPermission

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 - - 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 occurring within the URLPattern elements of the URLPatternSpec must be represented in escaped encoding as defined in RFC 2396.

httpMethods - - 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 containing all the possible HTTP methods.

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

Method Detail

equals

public boolean equals(Object p)

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).

Specified by:

equals in class Permission

Parameters:

p - - the WebUserDataPermission object being tested for equality with this WebUserDataPermission.

Returns:

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

getActions

public String 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.

Specified by:

getActions in class Permission

Returns:

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

hashCode

public int 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 hash- Code method on each of the two Permission objects must produce the same integer result (within an application).

Specified by:

hashCode in class Permission

Returns:

the integer hash code value for this object.

implies

public boolean implies(Permission p)

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 instance of 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 in the actions of the argument permission are a subset of the HTTP methods in 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.

Specified by:

implies in class Permission

Parameters:

p - - “this” WebUserDataPermission is checked to see if it implies the argument permission.

Returns:

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