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package com.sun.security.auth;
import java.security.CodeSource;
import java.security.PermissionCollection;
import javax.security.auth.Subject;
/**
* This class represents a default implementation for
* <code>javax.security.auth.Policy</code>.
*
* <p> This object stores the policy for entire Java runtime,
* and is the amalgamation of multiple static policy
* configurations that resides in files.
* The algorithm for locating the policy file(s) and reading their
* information into this <code>Policy</code> object is:
*
* <ol>
* <li>
* Loop through the security properties,
* <i>auth.policy.url.1</i>, <i>auth.policy.url.2</i>, ...,
* <i>auth.policy.url.X</i>".
* Each property value specifies a <code>URL</code> pointing to a
* policy file to be loaded. Read in and load each policy.
*
* <li>
* The <code>java.lang.System</code> property <i>java.security.auth.policy</i>
* may also be set to a <code>URL</code> pointing to another policy file
* (which is the case when a user uses the -D switch at runtime).
* If this property is defined, and its use is allowed by the
* security property file (the Security property,
* <i>policy.allowSystemProperty</i> is set to <i>true</i>),
* also load that policy.
*
* <li>
* If the <i>java.security.auth.policy</i> property is defined using
* "==" (rather than "="), then ignore all other specified
* policies and only load this policy.
* </ol>
*
* Each policy file consists of one or more grant entries, each of
* which consists of a number of permission entries.
*
* <pre>
* grant signedBy "<b>alias</b>", codeBase "<b>URL</b>",
* principal <b>principalClass</b> "<b>principalName</b>",
* principal <b>principalClass</b> "<b>principalName</b>",
* ... {
*
* permission <b>Type</b> "<b>name</b> "<b>action</b>",
* signedBy "<b>alias</b>";
* permission <b>Type</b> "<b>name</b> "<b>action</b>",
* signedBy "<b>alias</b>";
* ....
* };
* </pre>
*
* All non-bold items above must appear as is (although case
* doesn't matter and some are optional, as noted below).
* Italicized items represent variable values.
*
* <p> A grant entry must begin with the word <code>grant</code>.
* The <code>signedBy</code> and <code>codeBase</code>
* name/value pairs are optional.
* If they are not present, then any signer (including unsigned code)
* will match, and any codeBase will match. Note that the
* <code>principal</code> name/value pair is not optional.
* This <code>Policy</code> implementation only permits
* Principal-based grant entries. Note that the <i>principalClass</i>
* may be set to the wildcard value, *, which allows it to match
* any <code>Principal</code> class. In addition, the <i>principalName</i>
* may also be set to the wildcard value, *, allowing it to match
* any <code>Principal</code> name. When setting the <i>principalName</i>
* to the *, do not surround the * with quotes.
*
* <p> A permission entry must begin with the word <code>permission</code>.
* The word <code><i>Type</i></code> in the template above is
* a specific permission type, such as <code>java.io.FilePermission</code>
* or <code>java.lang.RuntimePermission</code>.
*
* <p> The "<i>action</i>" is required for
* many permission types, such as <code>java.io.FilePermission</code>
* (where it specifies what type of file access that is permitted).
* It is not required for categories such as
* <code>java.lang.RuntimePermission</code>
* where it is not necessary - you either have the
* permission specified by the <code>"<i>name</i>"</code>
* value following the type name or you don't.
*
* <p> The <code>signedBy</code> name/value pair for a permission entry
* is optional. If present, it indicates a signed permission. That is,
* the permission class itself must be signed by the given alias in
* order for it to be granted. For example,
* suppose you have the following grant entry:
*
* <pre>
* grant principal foo.com.Principal "Duke" {
* permission Foo "foobar", signedBy "FooSoft";
* }
* </pre>
*
* <p> Then this permission of type <i>Foo</i> is granted if the
* <code>Foo.class</code> permission has been signed by the
* "FooSoft" alias, or if <code>Foo.class</code> is a
* system class (i.e., is found on the CLASSPATH).
*
* <p> Items that appear in an entry must appear in the specified order
* (<code>permission</code>, <i>Type</i>, "<i>name</i>", and
* "<i>action</i>"). An entry is terminated with a semicolon.
*
* <p> Case is unimportant for the identifiers (<code>permission</code>,
* <code>signedBy</code>, <code>codeBase</code>, etc.) but is
* significant for the <i>Type</i>
* or for any string that is passed in as a value. <p>
*
* <p> An example of two entries in a policy configuration file is
* <pre>
* // if the code is comes from "foo.com" and is running as "Duke",
* // grant it read/write to all files in /tmp.
*
* grant codeBase "foo.com", principal foo.com.Principal "Duke" {
* permission java.io.FilePermission "/tmp/*", "read,write";
* };
*
* // grant any code running as "Duke" permission to read
* // the "java.vendor" Property.
*
* grant principal foo.com.Principal "Duke" {
* permission java.util.PropertyPermission "java.vendor";
* </pre>
*
* <p> This <code>Policy</code> implementation supports
* special handling for PrivateCredentialPermissions.
* If a grant entry is configured with a
* <code>PrivateCredentialPermission</code>,
* and the "Principal Class/Principal Name" for that
* <code>PrivateCredentialPermission</code> is "self",
* then the entry grants the specified <code>Subject</code> permission to
* access its own private Credential. For example,
* the following grants the <code>Subject</code> "Duke"
* access to its own a.b.Credential.
*
* <pre>
* grant principal foo.com.Principal "Duke" {
* permission javax.security.auth.PrivateCredentialPermission
* "a.b.Credential self",
* "read";
* };
* </pre>
*
* The following grants the <code>Subject</code> "Duke"
* access to all of its own private Credentials:
*
* <pre>
* grant principal foo.com.Principal "Duke" {
* permission javax.security.auth.PrivateCredentialPermission
* "* self",
* "read";
* };
* </pre>
*
* The following grants all Subjects authenticated as a
* <code>SolarisPrincipal</code> (regardless of their respective names)
* permission to access their own private Credentials:
*
* <pre>
* grant principal com.sun.security.auth.SolarisPrincipal * {
* permission javax.security.auth.PrivateCredentialPermission
* "* self",
* "read";
* };
* </pre>
*
* The following grants all Subjects permission to access their own
* private Credentials:
*
* <pre>
* grant principal * * {
* permission javax.security.auth.PrivateCredentialPermission
* "* self",
* "read";
* };
* </pre>
* @deprecated As of JDK 1.4, replaced by
* <code>sun.security.provider.PolicyFile</code>.
* This class is entirely deprecated.
*
* @see java.security.CodeSource
* @see java.security.Permissions
* @see java.security.ProtectionDomain
* @see java.security.Security security properties
*/
@Deprecated
public class PolicyFile extends javax.security.auth.Policy {
private final sun.security.provider.AuthPolicyFile apf;
/**
* Initializes the Policy object and reads the default policy
* configuration file(s) into the Policy object.
*/
public PolicyFile() {
apf = new sun.security.provider.AuthPolicyFile();
}
/**
* Refreshes the policy object by re-reading all the policy files.
*
* <p>
*
* @exception SecurityException if the caller doesn't have permission
* to refresh the <code>Policy</code>.
*/
@Override
public void refresh() {
apf.refresh();
}
/**
* Examines this <code>Policy</code> and returns the Permissions granted
* to the specified <code>Subject</code> and <code>CodeSource</code>.
*
* <p> Permissions for a particular <i>grant</i> entry are returned
* if the <code>CodeSource</code> constructed using the codebase and
* signedby values specified in the entry <code>implies</code>
* the <code>CodeSource</code> provided to this method, and if the
* <code>Subject</code> provided to this method contains all of the
* Principals specified in the entry.
*
* <p> The <code>Subject</code> provided to this method contains all
* of the Principals specified in the entry if, for each
* <code>Principal</code>, "P1", specified in the <i>grant</i> entry
* one of the following two conditions is met:
*
* <p>
* <ol>
* <li> the <code>Subject</code> has a
* <code>Principal</code>, "P2", where
* <code>P2.getClass().getName()</code> equals the
* P1's class name, and where
* <code>P2.getName()</code> equals the P1's name.
*
* <li> P1 implements
* <code>com.sun.security.auth.PrincipalComparator</code>,
* and <code>P1.implies</code> the provided <code>Subject</code>.
* </ol>
*
* <p> Note that this <code>Policy</code> implementation has
* special handling for PrivateCredentialPermissions.
* When this method encounters a <code>PrivateCredentialPermission</code>
* which specifies "self" as the <code>Principal</code> class and name,
* it does not add that <code>Permission</code> to the returned
* <code>PermissionCollection</code>. Instead, it builds
* a new <code>PrivateCredentialPermission</code>
* for each <code>Principal</code> associated with the provided
* <code>Subject</code>. Each new <code>PrivateCredentialPermission</code>
* contains the same Credential class as specified in the
* originally granted permission, as well as the Class and name
* for the respective <code>Principal</code>.
*
* <p>
*
* @param subject the Permissions granted to this <code>Subject</code>
* and the additionally provided <code>CodeSource</code>
* are returned. <p>
*
* @param codesource the Permissions granted to this <code>CodeSource</code>
* and the additionally provided <code>Subject</code>
* are returned.
*
* @return the Permissions granted to the provided <code>Subject</code>
* <code>CodeSource</code>.
*/
@Override
public PermissionCollection getPermissions(final Subject subject,
final CodeSource codesource) {
return apf.getPermissions(subject, codesource);
}
}