/*
* @(#)ConfigFile.java 1.18 03/12/19
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package com.sun.security.auth.login;
import javax.security.auth.AuthPermission;
import javax.security.auth.login.AppConfigurationEntry;
import java.io.*;
import java.util.*;
import java.net.URL;
import java.text.MessageFormat;
import sun.security.util.ResourcesMgr;
import sun.security.util.PropertyExpander;
/**
* This class represents a default implementation for
* <code>javax.security.auth.login.Configuration</code>.
*
* <p> This object stores the runtime login configuration representation,
* and is the amalgamation of multiple static login
* configurations that resides in files.
* The algorithm for locating the login configuration file(s) and reading their
* information into this <code>Configuration</code> object is:
*
* <ol>
* <li>
* Loop through the <code>java.security.Security</code> properties,
* <i>login.config.url.1</i>, <i>login.config.url.2</i>, ...,
* <i>login.config.url.X</i>. These properties are set
* in the Java security properties file, which is located in the file named
* <JAVA_HOME>/lib/security/java.security, where <JAVA_HOME>
* refers to the directory where the JDK was installed.
* Each property value specifies a <code>URL</code> pointing to a
* login configuration file to be loaded. Read in and load
* each configuration.
*
* <li>
* The <code>java.lang.System</code> property
* <i>java.security.auth.login.config</i>
* may also be set to a <code>URL</code> pointing to another
* login configuration 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 login configuration.
*
* <li>
* If the <i>java.security.auth.login.config</i> property is defined using
* "==" (rather than "="), then ignore all other specified
* login configurations and only load this configuration.
*
* <li>
* If no system or security properties were set, try to read from the file,
* ${user.home}/.java.login.config, where ${user.home} is the value
* represented by the "user.home" System property.
* </ol>
*
* <p> The configuration syntax supported by this implementation
* is exactly that syntax specified in the
* <code>javax.security.auth.login.Configuration</code> class.
*
* @version 1.6, 01/14/00
* @see javax.security.auth.login.LoginContext
*/
public class ConfigFile extends javax.security.auth.login.Configuration {
private StreamTokenizer st;
private int lookahead;
private int linenum;
private HashMap configuration;
private boolean expandProp = true;
private boolean testing = false;
/**
* Create a new <code>Configuration</code> object.
*/
public ConfigFile() {
String expandProperties = (String)
java.security.AccessController.doPrivileged
(new java.security.PrivilegedAction() {
public Object run() {
return System.getProperty("policy.expandProperties");
}
});
if ("false".equals(expandProperties))
expandProp = false;
try {
init();
} catch (IOException ioe) {
throw (SecurityException)
new SecurityException(ioe.getMessage()).initCause(ioe);
}
}
/**
* Read and initialize the entire login Configuration.
*
* <p>
*
* @exception IOException if the Configuration can not be initialized. <p>
* @exception SecurityException if the caller does not have permission
* to initialize the Configuration.
*/
private void init() throws IOException {
boolean initialized = false;
FileReader fr = null;
String sep = File.separator;
// new configuration
HashMap newConfig = new HashMap();
String allowSys = java.security.Security.getProperty
("policy.allowSystemProperty");
if ("true".equalsIgnoreCase(allowSys)) {
String extra_config = System.getProperty
("java.security.auth.login.config");
if (extra_config != null) {
boolean overrideAll = false;
if (extra_config.startsWith("=")) {
overrideAll = true;
extra_config = extra_config.substring(1);
}
try {
extra_config = PropertyExpander.expand(extra_config);
} catch (PropertyExpander.ExpandException peee) {
MessageFormat form = new MessageFormat
(ResourcesMgr.getString
("Unable to properly expand config",
"sun.security.util.AuthResources"));
Object[] source = {extra_config};
throw new IOException(form.format(source));
}
URL configURL = null;
try {
configURL = new URL(extra_config);
} catch (java.net.MalformedURLException mue) {
File configFile = new File(extra_config);
if (configFile.exists()) {
configURL = new URL("file:" +
configFile.getCanonicalPath());
} else {
MessageFormat form = new MessageFormat
(ResourcesMgr.getString
("extra_config (No such file or directory)",
"sun.security.util.AuthResources"));
Object[] source = {extra_config};
throw new IOException(form.format(source));
}
}
if (testing)
System.out.println("reading "+configURL);
init(configURL, newConfig);
initialized = true;
if (overrideAll) {
if (testing)
System.out.println("overriding other policies!");
}
}
}
int n = 1;
String config_url;
while ((config_url = java.security.Security.getProperty
("login.config.url."+n)) != null) {
try {
config_url = PropertyExpander.expand
(config_url).replace(File.separatorChar, '/');
if (testing)
System.out.println("\tReading config: " + config_url);
init(new URL(config_url), newConfig);
initialized = true;
} catch (PropertyExpander.ExpandException peee) {
MessageFormat form = new MessageFormat
(ResourcesMgr.getString
("Unable to properly expand config",
"sun.security.util.AuthResources"));
Object[] source = {config_url};
throw new IOException(form.format(source));
}
n++;
}
if (initialized == false && n == 1 && config_url == null) {
// get the config from the user's home directory
if (testing)
System.out.println("\tReading Policy " +
"from ~/.java.login.config");
config_url = System.getProperty("user.home");
try {
init(new URL("file:" + config_url +
File.separatorChar + ".java.login.config"),
newConfig);
} catch (IOException ioe) {
throw new IOException(ResourcesMgr.getString
("Unable to locate a login configuration",
"sun.security.util.AuthResources"));
}
}
configuration = newConfig;
}
private void init(URL config, HashMap newConfig) throws IOException {
InputStreamReader isr
= new InputStreamReader(getInputStream(config), "UTF-8");
readConfig(isr, newConfig);
isr.close();
}
/**
* Retrieve an entry from the Configuration using an application name
* as an index.
*
* <p>
*
* @param applicationName the name used to index the Configuration.
* @return an array of AppConfigurationEntries which correspond to
* the stacked configuration of LoginModules for this
* application, or null if this application has no configured
* LoginModules.
*/
public AppConfigurationEntry[] getAppConfigurationEntry
(String applicationName) {
LinkedList list = null;
synchronized (configuration) {
list = (LinkedList)configuration.get(applicationName);
}
if (list == null || list.size() == 0)
return null;
AppConfigurationEntry[] entries =
new AppConfigurationEntry[list.size()];
Iterator iterator = list.iterator();
for (int i = 0; iterator.hasNext(); i++) {
AppConfigurationEntry e = (AppConfigurationEntry)iterator.next();
entries[i] = new AppConfigurationEntry(e.getLoginModuleName(),
e.getControlFlag(),
e.getOptions());
}
return entries;
}
/**
* Refresh and reload the Configuration by re-reading all of the
* login configurations.
*
* <p>
*
* @exception SecurityException if the caller does not have permission
* to refresh the Configuration.
*/
public synchronized void refresh() {
java.lang.SecurityManager sm = System.getSecurityManager();
if (sm != null)
sm.checkPermission(new AuthPermission("refreshLoginConfiguration"));
java.security.AccessController.doPrivileged
(new java.security.PrivilegedAction() {
public Object run() {
try {
init();
} catch (java.io.IOException ioe) {
throw new SecurityException(ioe.getLocalizedMessage());
}
return null;
}
});
}
private void readConfig(Reader reader, HashMap newConfig)
throws IOException {
int linenum = 1;
if (!(reader instanceof BufferedReader))
reader = new BufferedReader(reader);
st = new StreamTokenizer(reader);
st.quoteChar('"');
st.wordChars('$', '$');
st.wordChars('_', '_');
st.wordChars('-', '-');
st.lowerCaseMode(false);
st.slashSlashComments(true);
st.slashStarComments(true);
st.eolIsSignificant(true);
lookahead = nextToken();
while (lookahead != StreamTokenizer.TT_EOF) {
if (testing)
System.out.print("\tReading next config entry: ");
parseLoginEntry(newConfig);
}
}
private void parseLoginEntry(HashMap newConfig) throws IOException {
String appName;
String moduleClass;
String sflag;
AppConfigurationEntry.LoginModuleControlFlag controlFlag;
LinkedList configEntries = new LinkedList();
// application name
appName = st.sval;
lookahead = nextToken();
if (testing)
System.out.println("appName = " + appName);
match("{");
// get the modules
while (peek("}") == false) {
HashSet argSet = new HashSet();
// get the module class name
moduleClass = match("module class name");
// controlFlag (required, optional, etc)
sflag = match("controlFlag");
if (sflag.equalsIgnoreCase("REQUIRED"))
controlFlag =
AppConfigurationEntry.LoginModuleControlFlag.REQUIRED;
else if (sflag.equalsIgnoreCase("REQUISITE"))
controlFlag =
AppConfigurationEntry.LoginModuleControlFlag.REQUISITE;
else if (sflag.equalsIgnoreCase("SUFFICIENT"))
controlFlag =
AppConfigurationEntry.LoginModuleControlFlag.SUFFICIENT;
else if (sflag.equalsIgnoreCase("OPTIONAL"))
controlFlag =
AppConfigurationEntry.LoginModuleControlFlag.OPTIONAL;
else {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\tInvalid control flag, flag",
"sun.security.util.AuthResources"));
Object[] source = {sflag};
throw new IOException(form.format(source));
}
// get the args
HashMap options = new HashMap();
String key;
String value;
while (peek(";") == false) {
key = match("option key");
match("=");
try {
value = expand(match("option value"));
} catch (PropertyExpander.ExpandException peee) {
throw new IOException(peee.getLocalizedMessage());
}
options.put(key, value);
}
lookahead = nextToken();
// create the new element
if (testing) {
System.out.print("\t\t" + moduleClass + ", " + sflag);
java.util.Iterator i = options.keySet().iterator();
while (i.hasNext()) {
key = (String)i.next();
System.out.print(", " +
key +
"=" +
(String)options.get(key));
}
System.out.println("");
}
AppConfigurationEntry entry = new AppConfigurationEntry
(moduleClass,
controlFlag,
options);
configEntries.add(entry);
}
match("}");
match(";");
// add this configuration entry
if (newConfig.containsKey(appName)) {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\t" +
"Can not specify multiple entries for appName",
"sun.security.util.AuthResources"));
Object[] source = {appName};
throw new IOException(form.format(source));
}
newConfig.put(appName, configEntries);
if (testing)
System.out.println("\t\t***Added entry for " +
appName + " to overall configuration***");
}
private String match(String expect) throws IOException {
String value = null;
switch(lookahead) {
case StreamTokenizer.TT_EOF:
MessageFormat form1 = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\texpected [expect], " +
"read [end of file]",
"sun.security.util.AuthResources"));
Object[] source1 = {expect};
throw new IOException(form1.format(source1));
case '"':
case StreamTokenizer.TT_WORD:
if (expect.equalsIgnoreCase("module class name") ||
expect.equalsIgnoreCase("controlFlag") ||
expect.equalsIgnoreCase("option key") ||
expect.equalsIgnoreCase("option value")) {
value = st.sval;
lookahead = nextToken();
} else {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\tLine line: " +
"expected [expect], found [value]",
"sun.security.util.AuthResources"));
Object[] source = {new Integer(linenum), expect, st.sval};
throw new IOException(form.format(source));
}
break;
case '{':
if (expect.equalsIgnoreCase("{")) {
lookahead = nextToken();
} else {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\tLine line: expected [expect]",
"sun.security.util.AuthResources"));
Object[] source = {new Integer(linenum), expect, st.sval};
throw new IOException(form.format(source));
}
break;
case ';':
if (expect.equalsIgnoreCase(";")) {
lookahead = nextToken();
} else {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\tLine line: expected [expect]",
"sun.security.util.AuthResources"));
Object[] source = {new Integer(linenum), expect, st.sval};
throw new IOException(form.format(source));
}
break;
case '}':
if (expect.equalsIgnoreCase("}")) {
lookahead = nextToken();
} else {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\tLine line: expected [expect]",
"sun.security.util.AuthResources"));
Object[] source = {new Integer(linenum), expect, st.sval};
throw new IOException(form.format(source));
}
break;
case '=':
if (expect.equalsIgnoreCase("=")) {
lookahead = nextToken();
} else {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\tLine line: expected [expect]",
"sun.security.util.AuthResources"));
Object[] source = {new Integer(linenum), expect, st.sval};
throw new IOException(form.format(source));
}
break;
default:
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\tLine line: " +
"expected [expect], found [value]",
"sun.security.util.AuthResources"));
Object[] source = {new Integer(linenum), expect, st.sval};
throw new IOException(form.format(source));
}
return value;
}
private boolean peek(String expect) {
boolean found = false;
switch (lookahead) {
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 int nextToken() throws IOException {
int tok;
while ((tok = st.nextToken()) == StreamTokenizer.TT_EOL) {
linenum++;
}
return tok;
}
/*
* Fast path reading from file urls in order to avoid calling
* FileURLConnection.connect() which can be quite slow the first time
* it is called. We really should clean up FileURLConnection so that
* this is not a problem but in the meantime this fix helps reduce
* start up time noticeably for the new launcher. -- DAC
*/
private InputStream getInputStream(URL url) throws IOException {
if ("file".equals(url.getProtocol())) {
String path = url.getFile().replace('/', File.separatorChar);
return new FileInputStream(path);
} else {
return url.openStream();
}
}
private String expand(String value)
throws PropertyExpander.ExpandException, IOException {
if ("".equals(value)) {
return value;
}
if (expandProp) {
String s = PropertyExpander.expand(value);
if (s == null || s.length() == 0) {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("Configuration Error:\n\tLine line: " +
"system property [value] expanded to empty value",
"sun.security.util.AuthResources"));
Object[] source = {new Integer(linenum), value};
throw new IOException(form.format(source));
}
return s;
} else {
return value;
}
}
}
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