/*
* @(#)PolicyParser.java 1.41 04/05/18
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package com.sun.security.auth;
import java.io.*;
import java.lang.RuntimePermission;
import java.net.MalformedURLException;
import java.net.SocketPermission;
import java.net.URL;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.LinkedList;
import java.util.ListIterator;
import java.util.Vector;
import java.util.StringTokenizer;
import java.security.GeneralSecurityException;
import sun.security.util.PropertyExpander;
/**
* The policy for a Java runtime (specifying
* which permissions are available for code from various principals)
* is represented as a separate
* persistent configuration. The configuration may be stored as a
* flat ASCII file, as a serialized binary file of
* the Policy class, or as a database. <p>
*
* <p>The Java runtime creates one global Policy object, which is used to
* represent the static policy configuration file. It is consulted by
* a ProtectionDomain when the protection domain initializes its set of
* permissions. <p>
*
* <p>The Policy <code>init</code> method parses the policy
* configuration file, and then
* populates the Policy object. The Policy object is agnostic in that
* it is not involved in making policy decisions. It is merely the
* Java runtime representation of the persistent policy configuration
* file. <p>
*
* <p>When a protection domain needs to initialize its set of
* permissions, it executes code such as the following
* to ask the global Policy object to populate a
* Permissions object with the appropriate permissions:
* <pre>
* policy = Policy.getPolicy();
* Permissions perms = policy.getPermissions(MyCodeSource)
* </pre>
*
* <p>The protection domain passes in a CodeSource
* object, which encapsulates its codebase (URL) and public key attributes.
* The Policy object evaluates the global policy in light of who the
* principal is and returns an appropriate Permissions object.
*
* @deprecated As of JDK 1.4, replaced by
* {@link sun.security.provider.PolicyParser}.
* This class is entirely deprecated.
*
* @version 1.41, 05/18/04
* @author Roland Schemers
*
* @since JDK1.2
*/
@Deprecated
class PolicyParser {
private static final java.util.ResourceBundle rb =
(java.util.ResourceBundle)java.security.AccessController.doPrivileged
(new java.security.PrivilegedAction() {
public Object run() {
return (java.util.ResourceBundle.getBundle
("sun.security.util.AuthResources"));
}
});
private Vector grantEntries;
// Convenience variables for parsing
private static final sun.security.util.Debug debug =
sun.security.util.Debug.getInstance("parser", "\t[Auth Policy Parser]");
private StreamTokenizer st;
private int lookahead;
private int linenum;
private boolean expandProp = false;
private String keyStoreUrlString = null; // unexpanded
private String keyStoreType = null;
private String expand(String value)
throws PropertyExpander.ExpandException
{
if (expandProp)
return PropertyExpander.expand(value);
else
return value;
}
/**
* Creates a PolicyParser object.
*/
public PolicyParser() {
grantEntries = new Vector();
}
public PolicyParser(boolean expandProp) {
this();
this.expandProp = expandProp;
}
/**
* Reads a policy configuration into the Policy object using a
* Reader object. <p>
*
* @param policy the policy Reader object.
*
* @exception ParsingException if the policy configuration contains
* a syntax error.
*
* @exception IOException if an error occurs while reading the policy
* configuration.
*/
public void read(Reader policy)
throws ParsingException, IOException
{
if (!(policy instanceof BufferedReader)) {
policy = new BufferedReader(policy);
}
/**
* Configure the stream tokenizer:
* Recognize strings between "..."
* Don't convert words to lowercase
* Recognize both C-style and C++-style comments
* Treat end-of-line as white space, not as a token
*/
st = new StreamTokenizer(policy);
st.resetSyntax();
st.wordChars('a', 'z');
st.wordChars('A', 'Z');
st.wordChars('.', '.');
st.wordChars('0', '9');
st.wordChars('_', '_');
st.wordChars('$', '$');
st.wordChars(128 + 32, 255);
st.whitespaceChars(0, ' ');
st.commentChar('/');
st.quoteChar('\'');
st.quoteChar('"');
st.lowerCaseMode(false);
st.ordinaryChar('/');
st.slashSlashComments(true);
st.slashStarComments(true);
/**
* The main parsing loop. The loop is executed once
* for each entry in the config file. The entries
* are delimited by semicolons. Once we've read in
* the information for an entry, go ahead and try to
* add it to the policy vector.
*
*/
lookahead = st.nextToken();
while (lookahead != StreamTokenizer.TT_EOF) {
if (peek("grant")) {
GrantEntry ge = parseGrantEntry();
// could be null if we couldn't expand a property
if (ge != null)
add(ge);
} else if (peek("keystore") && keyStoreUrlString==null) {
// only one keystore entry per policy file, others will be
// ignored
parseKeyStoreEntry();
} else {
// error?
}
match(";");
}
}
public void add(GrantEntry ge)
{
grantEntries.addElement(ge);
}
public void replace(GrantEntry origGe, GrantEntry newGe)
{
grantEntries.setElementAt(newGe, grantEntries.indexOf(origGe));
}
public boolean remove(GrantEntry ge)
{
return grantEntries.removeElement(ge);
}
/**
* Returns the (possibly expanded) keystore location, or null if the
* expansion fails.
*/
public String getKeyStoreUrl() {
try {
if (keyStoreUrlString!=null && keyStoreUrlString.length()!=0) {
return expand(keyStoreUrlString).replace(File.separatorChar,
'/');
}
} catch (PropertyExpander.ExpandException peee) {
return null;
}
return null;
}
public void setKeyStoreUrl(String url) {
keyStoreUrlString = url;
}
public String getKeyStoreType() {
return keyStoreType;
}
public void setKeyStoreType(String type) {
keyStoreType = type;
}
/**
* Enumerate all the entries in the global policy object.
* This method is used by policy admin tools. The tools
* should use the Enumeration methods on the returned object
* to fetch the elements sequentially.
*/
public Enumeration grantElements(){
return grantEntries.elements();
}
/**
* write out the policy
*/
public void write(Writer policy)
{
PrintWriter out = new PrintWriter(new BufferedWriter(policy));
Enumeration enum_ = grantElements();
out.println("/* AUTOMATICALLY GENERATED ON "+
(new java.util.Date()) + "*/");
out.println("/* DO NOT EDIT */");
out.println();
// write the (unexpanded) keystore entry as the first entry of the
// policy file
if (keyStoreUrlString != null) {
writeKeyStoreEntry(out);
}
// write "grant" entries
while (enum_.hasMoreElements()) {
GrantEntry ge = (GrantEntry) enum_.nextElement();
ge.write(out);
out.println();
}
out.flush();
}
/**
* parses a keystore entry
*/
private void parseKeyStoreEntry() throws ParsingException, IOException {
match("keystore");
keyStoreUrlString = match("quoted string");
// parse keystore type
if (!peek(",")) {
return; // default type
}
match(",");
if (peek("\"")) {
keyStoreType = match("quoted string");
} else {
throw new ParsingException(st.lineno(),
rb.getString("expected keystore type"));
}
}
/**
* writes the (unexpanded) keystore entry
*/
private void writeKeyStoreEntry(PrintWriter out) {
out.print("keystore \"");
out.print(keyStoreUrlString);
out.print('"');
if (keyStoreType != null && keyStoreType.length() > 0)
out.print(", \"" + keyStoreType + "\"");
out.println(";");
out.println();
}
/**
* parse a Grant entry
*/
private GrantEntry parseGrantEntry()
throws ParsingException, IOException
{
GrantEntry e = new GrantEntry();
LinkedList principals = null;
boolean ignoreEntry = false;
match("grant");
while(!peek("{")) {
if (peekAndMatch("Codebase")) {
e.codeBase = match("quoted string");
peekAndMatch(",");
} else if (peekAndMatch("SignedBy")) {
e.signedBy = match("quoted string");
peekAndMatch(",");
} else if (peekAndMatch("Principal")) {
if (principals == null) {
principals = new LinkedList();
}
// check for principalClass wildcard
String principalClass;
if (peek("*")) {
match("*");
principalClass = PrincipalEntry.WILDCARD_CLASS;
} else {
principalClass = match("principal type");
}
// check for principalName wildcard
String principalName;
if (peek("*")) {
match("*");
principalName = PrincipalEntry.WILDCARD_NAME;
} else {
principalName = match("quoted string");
}
// disallow WILDCARD_CLASS && actual name
if (principalClass.equals(PrincipalEntry.WILDCARD_CLASS) &&
!principalName.equals(PrincipalEntry.WILDCARD_NAME)) {
if (debug != null)
debug.println("disallowing principal that has " +
"WILDCARD class but no WILDCARD name");
throw new ParsingException
(st.lineno(),
rb.getString("can not specify Principal with a ") +
rb.getString("wildcard class without a wildcard name"));
}
try {
principalName = expand(principalName);
principals.add
(new PrincipalEntry(principalClass, principalName));
} catch (PropertyExpander.ExpandException peee) {
// ignore the entire policy entry
// but continue parsing all the info
// so we can get to the next entry
if (debug != null)
debug.println("principal name expansion failed: " +
principalName);
ignoreEntry = true;
}
peekAndMatch(",");
} else {
throw new
ParsingException(st.lineno(),
rb.getString("expected codeBase or SignedBy"));
}
}
// disallow non principal-based grant entries
if (principals == null) {
throw new ParsingException
(st.lineno(),
rb.getString("only Principal-based grant entries permitted"));
}
e.principals = principals;
match("{");
while(!peek("}")) {
if (peek("Permission")) {
try {
PermissionEntry pe = parsePermissionEntry();
e.add(pe);
} catch (PropertyExpander.ExpandException peee) {
// ignore. The add never happened
skipEntry(); // BugId 4219343
}
match(";");
} else {
throw new
ParsingException(st.lineno(),
rb.getString("expected permission entry"));
}
}
match("}");
try {
if (e.codeBase != null)
e.codeBase = expand(e.codeBase).replace(File.separatorChar, '/');
e.signedBy = expand(e.signedBy);
} catch (PropertyExpander.ExpandException peee) {
return null;
}
return (ignoreEntry == true) ? null : e;
}
/**
* parse a Permission entry
*/
private PermissionEntry parsePermissionEntry()
throws ParsingException, IOException, PropertyExpander.ExpandException
{
PermissionEntry e = new PermissionEntry();
// Permission
match("Permission");
e.permission = match("permission type");
if (peek("\"")) {
// Permission name
e.name = expand(match("quoted string"));
}
if (!peek(",")) {
return e;
}
match(",");
if (peek("\"")) {
e.action = expand(match("quoted string"));
if (!peek(",")) {
return e;
}
match(",");
}
if (peekAndMatch("SignedBy")) {
e.signedBy = expand(match("quoted string"));
}
return e;
}
private boolean peekAndMatch(String expect)
throws ParsingException, IOException
{
if (peek(expect)) {
match(expect);
return true;
} else {
return false;
}
}
private boolean peek(String expect) {
boolean found = false;
switch (lookahead) {
case StreamTokenizer.TT_WORD:
if (expect.equalsIgnoreCase(st.sval))
found = true;
break;
case ',':
if (expect.equalsIgnoreCase(","))
found = true;
break;
case '{':
if (expect.equalsIgnoreCase("{"))
found = true;
break;
case '}':
if (expect.equalsIgnoreCase("}"))
found = true;
break;
case '"':
if (expect.equalsIgnoreCase("\""))
found = true;
break;
case '*':
if (expect.equalsIgnoreCase("*"))
found = true;
break;
default:
}
return found;
}
private String match(String expect)
throws ParsingException, IOException
{
String value = null;
switch (lookahead) {
case StreamTokenizer.TT_NUMBER:
throw new ParsingException(st.lineno(), expect,
rb.getString("number ") +
String.valueOf(st.nval));
case StreamTokenizer.TT_EOF:
throw new ParsingException
(rb.getString("expected ") + expect +
rb.getString(", read end of file"));
case StreamTokenizer.TT_WORD:
if (expect.equalsIgnoreCase(st.sval)) {
lookahead = st.nextToken();
} else if (expect.equalsIgnoreCase("permission type")) {
value = st.sval;
lookahead = st.nextToken();
} else if (expect.equalsIgnoreCase("principal type")) {
value = st.sval;
lookahead = st.nextToken();
} else {
throw new ParsingException(st.lineno(), expect, st.sval);
}
break;
case '"':
if (expect.equalsIgnoreCase("quoted string")) {
value = st.sval;
lookahead = st.nextToken();
} else if (expect.equalsIgnoreCase("permission type")) {
value = st.sval;
lookahead = st.nextToken();
} else if (expect.equalsIgnoreCase("principal type")) {
value = st.sval;
lookahead = st.nextToken();
} else {
throw new ParsingException(st.lineno(), expect, st.sval);
}
break;
case ',':
if (expect.equalsIgnoreCase(","))
lookahead = st.nextToken();
else
throw new ParsingException(st.lineno(), expect, ",");
break;
case '{':
if (expect.equalsIgnoreCase("{"))
lookahead = st.nextToken();
else
throw new ParsingException(st.lineno(), expect, "{");
break;
case '}':
if (expect.equalsIgnoreCase("}"))
lookahead = st.nextToken();
else
throw new ParsingException(st.lineno(), expect, "}");
break;
case ';':
if (expect.equalsIgnoreCase(";"))
lookahead = st.nextToken();
else
throw new ParsingException(st.lineno(), expect, ";");
break;
case '*':
if (expect.equalsIgnoreCase("*"))
lookahead = st.nextToken();
else
throw new ParsingException(st.lineno(), expect, "*");
break;
default:
throw new ParsingException(st.lineno(), expect,
new String(new char[] {(char)lookahead}));
}
return value;
}
/**
* skip all tokens for this entry leaving the delimiter ";"
* in the stream.
*/
private void skipEntry()
throws ParsingException, IOException
{
while(lookahead != ';') {
switch (lookahead) {
case StreamTokenizer.TT_NUMBER:
throw new ParsingException(st.lineno(), ";",
rb.getString("number ") +
String.valueOf(st.nval));
case StreamTokenizer.TT_EOF:
throw new ParsingException
(rb.getString("expected ';', read end of file"));
default:
lookahead = st.nextToken();
}
}
}
/**
* Each grant entry in the policy configuration file is
* represented by a
* GrantEntry object. <p>
*
* <p>
* For example, the entry
* <pre>
* grant signedBy "Duke" {
* permission java.io.FilePermission "/tmp", "read,write";
* };
*
* </pre>
* is represented internally
* <pre>
*
* pe = new PermissionEntry("java.io.FilePermission",
* "/tmp", "read,write");
*
* ge = new GrantEntry("Duke", null);
*
* ge.add(pe);
*
* </pre>
*
* @author Roland Schemers
*
* version 1.19, 05/21/98
*/
static class GrantEntry {
public String signedBy;
public String codeBase;
public LinkedList principals;
public Vector permissionEntries;
public GrantEntry() {
permissionEntries = new Vector();
}
public GrantEntry(String signedBy, String codeBase) {
this.codeBase = codeBase;
this.signedBy = signedBy;
permissionEntries = new Vector();
}
public void add(PermissionEntry pe)
{
permissionEntries.addElement(pe);
}
public boolean remove(PermissionEntry pe)
{
return permissionEntries.removeElement(pe);
}
public boolean contains(PermissionEntry pe)
{
return permissionEntries.contains(pe);
}
/**
* Enumerate all the permission entries in this GrantEntry.
*/
public Enumeration permissionElements(){
return permissionEntries.elements();
}
public void write(PrintWriter out) {
out.print("grant");
if (signedBy != null) {
out.print(" signedBy \"");
out.print(signedBy);
out.print('"');
if (codeBase != null)
out.print(", ");
}
if (codeBase != null) {
out.print(" codeBase \"");
out.print(codeBase);
out.print('"');
if (principals != null && principals.size() > 0)
out.print(",\n");
}
if (principals != null && principals.size() > 0) {
ListIterator pli = principals.listIterator();
while (pli.hasNext()) {
out.print("\tPrincipal ");
PrincipalEntry pe = (PrincipalEntry)pli.next();
out.print((String)pe.principalClass +
" \"" + pe.principalName + "\"");
if (pli.hasNext())
out.print(",\n");
}
}
out.println(" {");
Enumeration enum_ = permissionEntries.elements();
while (enum_.hasMoreElements()) {
PermissionEntry pe =
(PermissionEntry) enum_.nextElement();
out.write(" ");
pe.write(out);
}
out.println("};");
}
}
/**
* Principal info (class and name) in a grant entry
*/
static class PrincipalEntry {
static final String WILDCARD_CLASS = "WILDCARD_PRINCIPAL_CLASS";
static final String WILDCARD_NAME = "WILDCARD_PRINCIPAL_NAME";
String principalClass;
String principalName;
/**
* A PrincipalEntry consists of the <code>Principal</code>
* class and <code>Principal</code> name.
*
* <p>
*
* @param principalClass the <code>Principal</code> class. <p>
*
* @param principalName the <code>Principal</code> name. <p>
*/
public PrincipalEntry(String principalClass, String principalName) {
if (principalClass == null || principalName == null)
throw new NullPointerException
("null principalClass or principalName");
this.principalClass = principalClass;
this.principalName = principalName;
}
/**
* Test for equality between the specified object and this object.
* Two PrincipalEntries are equal if their PrincipalClass and
* PrincipalName values are equal.
*
* <p>
*
* @param obj the object to test for equality with this object.
*
* @return true if the objects are equal, false otherwise.
*/
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!(obj instanceof PrincipalEntry))
return false;
PrincipalEntry that = (PrincipalEntry)obj;
if (this.principalClass.equals(that.principalClass) &&
this.principalName.equals(that.principalName)) {
return true;
}
return false;
}
/**
* Return a hashcode for this <code>PrincipalEntry</code>.
*
* <p>
*
* @return a hashcode for this <code>PrincipalEntry</code>.
*/
public int hashCode() {
return principalClass.hashCode();
}
}
/**
* Each permission entry in the policy configuration file is
* represented by a
* PermissionEntry object. <p>
*
* <p>
* For example, the entry
* <pre>
* permission java.io.FilePermission "/tmp", "read,write";
* </pre>
* is represented internally
* <pre>
*
* pe = new PermissionEntry("java.io.FilePermission",
* "/tmp", "read,write");
* </pre>
*
* @author Roland Schemers
*
* version 1.19, 05/21/98
*/
static class PermissionEntry {
public String permission;
public String name;
public String action;
public String signedBy;
public PermissionEntry() {
}
public PermissionEntry(String permission,
String name,
String action) {
this.permission = permission;
this.name = name;
this.action = action;
}
/**
* Calculates a hash code value for the object. Objects
* which are equal will also have the same hashcode.
*/
public int hashCode() {
int retval = permission.hashCode();
if (name != null) retval ^= name.hashCode();
if (action != null) retval ^= action.hashCode();
return retval;
}
public boolean equals(Object obj) {
if (obj == this)
return true;
if (! (obj instanceof PermissionEntry))
return false;
PermissionEntry that = (PermissionEntry) obj;
if (this.permission == null) {
if (that.permission != null) return false;
} else {
if (!this.permission.equals(that.permission)) return false;
}
if (this.name == null) {
if (that.name != null) return false;
} else {
if (!this.name.equals(that.name)) return false;
}
if (this.action == null) {
if (that.action != null) return false;
} else {
if (!this.action.equals(that.action)) return false;
}
if (this.signedBy == null) {
if (that.signedBy != null) return false;
} else {
if (!this.signedBy.equals(that.signedBy)) return false;
}
// everything matched -- the 2 objects are equal
return true;
}
public void write(PrintWriter out) {
out.print("permission ");
out.print(permission);
if (name != null) {
out.print(" \"");
// have to add escape chars for quotes
if (name.indexOf("\"") != -1) {
int numQuotes = 0;
char[] chars = name.toCharArray();
// count the number of quote chars
for (int i = 0; i < chars.length; i++) {
if (chars[i] == '"')
numQuotes++;
}
// now, add an escape char before each quote
char[] newChars = new char[chars.length + numQuotes];
for (int i = 0, j = 0; i < chars.length; i++) {
if (chars[i] != '"') {
newChars[j++] = chars[i];
} else {
newChars[j++] = '\\';
newChars[j++] = chars[i];
}
}
name = new String(newChars);
}
out.print(name);
out.print('"');
}
if (action != null) {
out.print(", \"");
out.print(action);
out.print('"');
}
if (signedBy != null) {
out.print(", signedBy \"");
out.print(signedBy);
out.print('"');
}
out.println(";");
}
}
static class ParsingException extends GeneralSecurityException {
private static final long serialVersionUID = 8240970523155877400L;
/**
* Constructs a ParsingException with the specified
* detail message. A detail message is a String that describes
* this particular exception, which may, for example, specify which
* algorithm is not available.
*
* @param msg the detail message.
*/
public ParsingException(String msg) {
super(msg);
}
public ParsingException(int line, String msg) {
super(rb.getString("line ") + line + rb.getString(": ") + msg);
}
public ParsingException(int line, String expect, String actual) {
super(rb.getString("line ") + line + rb.getString(": expected '") +
expect + rb.getString("', found '") + actual +
rb.getString("'"));
}
}
public static void main(String arg[]) throws Exception {
PolicyParser pp = new PolicyParser(true);
pp.read(new FileReader(arg[0]));
FileWriter fr = new FileWriter(arg[1]);
pp.write(fr);
fr.close();
}
}
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