JDK8/Java8源码在线阅读
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package sun.security.provider;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.security.Security;
import java.security.URIParameter;
import java.text.MessageFormat;
import java.util.*;
import javax.security.auth.AuthPermission;
import javax.security.auth.login.AppConfigurationEntry;
import javax.security.auth.login.AppConfigurationEntry.LoginModuleControlFlag;
import javax.security.auth.login.Configuration;
import javax.security.auth.login.ConfigurationSpi;
import sun.security.util.Debug;
import sun.security.util.PropertyExpander;
import sun.security.util.ResourcesMgr;
/**
* This class represents a default implementation for
* {@code javax.security.auth.login.Configuration}.
*
* <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}
* object is:
*
* <ol>
* <li>
* Loop through the security properties,
* <i>login.config.url.1</i>, <i>login.config.url.2</i>, ...,
* <i>login.config.url.X</i>.
* Each property value specifies a {@code URL} pointing to a
* login configuration file to be loaded. Read in and load
* each configuration.
*
* <li>
* The {@code java.lang.System} property
* <i>java.security.auth.login.config</i>
* may also be set to a {@code URL} 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} class.
*
* @see javax.security.auth.login.LoginContext
* @see java.security.Security security properties
*/
public final class ConfigFile extends Configuration {
private final Spi spi;
public ConfigFile() {
spi = new Spi();
}
@Override
public AppConfigurationEntry[] getAppConfigurationEntry(String appName) {
return spi.engineGetAppConfigurationEntry(appName);
}
@Override
public synchronized void refresh() {
spi.engineRefresh();
}
public final static class Spi extends ConfigurationSpi {
private URL url;
private boolean expandProp = true;
private Map<String, List<AppConfigurationEntry>> configuration;
private int linenum;
private StreamTokenizer st;
private int lookahead;
private static Debug debugConfig = Debug.getInstance("configfile");
private static Debug debugParser = Debug.getInstance("configparser");
/**
* Creates a new {@code ConfigurationSpi} object.
*
* @throws SecurityException if the {@code ConfigurationSpi} can not be
* initialized
*/
public Spi() {
try {
init();
} catch (IOException ioe) {
throw new SecurityException(ioe);
}
}
/**
* Creates a new {@code ConfigurationSpi} object from the specified
* {@code URI}.
*
* @param uri the {@code URI}
* @throws SecurityException if the {@code ConfigurationSpi} can not be
* initialized
* @throws NullPointerException if {@code uri} is null
*/
public Spi(URI uri) {
// only load config from the specified URI
try {
url = uri.toURL();
init();
} catch (IOException ioe) {
throw new SecurityException(ioe);
}
}
public Spi(final Configuration.Parameters params) throws IOException {
// call in a doPrivileged
//
// we have already passed the Configuration.getInstance
// security check. also this class is not freely accessible
// (it is in the "sun" package).
try {
AccessController.doPrivileged(new PrivilegedExceptionAction<Void>() {
public Void run() throws IOException {
if (params == null) {
init();
} else {
if (!(params instanceof URIParameter)) {
throw new IllegalArgumentException
("Unrecognized parameter: " + params);
}
URIParameter uriParam = (URIParameter)params;
url = uriParam.getURI().toURL();
init();
}
return null;
}
});
} catch (PrivilegedActionException pae) {
throw (IOException)pae.getException();
}
// if init() throws some other RuntimeException,
// let it percolate up naturally.
}
/**
* Read and initialize the entire login Configuration from the
* configured URL.
*
* @throws IOException if the Configuration can not be initialized
* @throws SecurityException if the caller does not have permission
* to initialize the Configuration
*/
private void init() throws IOException {
boolean initialized = false;
// For policy.expandProperties, check if either a security or system
// property is set to false (old code erroneously checked the system
// prop so we must check both to preserve compatibility).
String expand = Security.getProperty("policy.expandProperties");
if (expand == null) {
expand = System.getProperty("policy.expandProperties");
}
if ("false".equals(expand)) {
expandProp = false;
}
// new configuration
Map<String, List<AppConfigurationEntry>> newConfig = new HashMap<>();
if (url != null) {
/**
* If the caller specified a URI via Configuration.getInstance,
* we only read from that URI
*/
if (debugConfig != null) {
debugConfig.println("reading " + url);
}
init(url, newConfig);
configuration = newConfig;
return;
}
/**
* Caller did not specify URI via Configuration.getInstance.
* Read from URLs listed in the java.security properties file.
*/
String allowSys = 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) {
throw ioException("Unable.to.properly.expand.config",
extra_config);
}
URL configURL = null;
try {
configURL = new URL(extra_config);
} catch (MalformedURLException mue) {
File configFile = new File(extra_config);
if (configFile.exists()) {
configURL = configFile.toURI().toURL();
} else {
throw ioException(
"extra.config.No.such.file.or.directory.",
extra_config);
}
}
if (debugConfig != null) {
debugConfig.println("reading "+configURL);
}
init(configURL, newConfig);
initialized = true;
if (overrideAll) {
if (debugConfig != null) {
debugConfig.println("overriding other policies!");
}
configuration = newConfig;
return;
}
}
}
int n = 1;
String config_url;
while ((config_url = Security.getProperty
("login.config.url."+n)) != null) {
try {
config_url = PropertyExpander.expand
(config_url).replace(File.separatorChar, '/');
if (debugConfig != null) {
debugConfig.println("\tReading config: " + config_url);
}
init(new URL(config_url), newConfig);
initialized = true;
} catch (PropertyExpander.ExpandException peee) {
throw ioException("Unable.to.properly.expand.config",
config_url);
}
n++;
}
if (initialized == false && n == 1 && config_url == null) {
// get the config from the user's home directory
if (debugConfig != null) {
debugConfig.println("\tReading Policy " +
"from ~/.java.login.config");
}
config_url = System.getProperty("user.home");
String userConfigFile = config_url + File.separatorChar +
".java.login.config";
// No longer throws an exception when there's no config file
// at all. Returns an empty Configuration instead.
if (new File(userConfigFile).exists()) {
init(new File(userConfigFile).toURI().toURL(), newConfig);
}
}
configuration = newConfig;
}
private void init(URL config,
Map<String, List<AppConfigurationEntry>> newConfig)
throws IOException {
try (InputStreamReader isr
= new InputStreamReader(getInputStream(config), "UTF-8")) {
readConfig(isr, newConfig);
} catch (FileNotFoundException fnfe) {
if (debugConfig != null) {
debugConfig.println(fnfe.toString());
}
throw new IOException(ResourcesMgr.getString
("Configuration.Error.No.such.file.or.directory",
"sun.security.util.AuthResources"));
}
}
/**
* Retrieve an entry from the Configuration using an application name
* as an index.
*
* @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.
*/
@Override
public AppConfigurationEntry[] engineGetAppConfigurationEntry
(String applicationName) {
List<AppConfigurationEntry> list = null;
synchronized (configuration) {
list = configuration.get(applicationName);
}
if (list == null || list.size() == 0) {
return null;
}
AppConfigurationEntry[] entries =
new AppConfigurationEntry[list.size()];
Iterator<AppConfigurationEntry> iterator = list.iterator();
for (int i = 0; iterator.hasNext(); i++) {
AppConfigurationEntry e = 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.
*
* @throws SecurityException if the caller does not have permission
* to refresh the Configuration.
*/
@Override
public synchronized void engineRefresh() {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(
new AuthPermission("refreshLoginConfiguration"));
}
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
try {
init();
} catch (IOException ioe) {
throw new SecurityException(ioe.getLocalizedMessage(),
ioe);
}
return null;
}
});
}
private void readConfig(Reader reader,
Map<String, List<AppConfigurationEntry>> newConfig)
throws IOException {
linenum = 1;
if (!(reader instanceof BufferedReader)) {
reader = new BufferedReader(reader);
}
st = new StreamTokenizer(reader);
st.quoteChar('"');
st.wordChars('$', '$');
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) {
parseLoginEntry(newConfig);
}
}
private void parseLoginEntry(
Map<String, List<AppConfigurationEntry>> newConfig)
throws IOException {
List<AppConfigurationEntry> configEntries = new LinkedList<>();
// application name
String appName = st.sval;
lookahead = nextToken();
if (debugParser != null) {
debugParser.println("\tReading next config entry: " + appName);
}
match("{");
// get the modules
while (peek("}") == false) {
// get the module class name
String moduleClass = match("module class name");
// controlFlag (required, optional, etc)
LoginModuleControlFlag controlFlag;
String sflag = match("controlFlag").toUpperCase();
switch (sflag) {
case "REQUIRED":
controlFlag = LoginModuleControlFlag.REQUIRED;
break;
case "REQUISITE":
controlFlag = LoginModuleControlFlag.REQUISITE;
break;
case "SUFFICIENT":
controlFlag = LoginModuleControlFlag.SUFFICIENT;
break;
case "OPTIONAL":
controlFlag = LoginModuleControlFlag.OPTIONAL;
break;
default:
throw ioException(
"Configuration.Error.Invalid.control.flag.flag",
sflag);
}
// get the args
Map<String, String> options = new HashMap<>();
while (peek(";") == false) {
String key = match("option key");
match("=");
try {
options.put(key, expand(match("option value")));
} catch (PropertyExpander.ExpandException peee) {
throw new IOException(peee.getLocalizedMessage());
}
}
lookahead = nextToken();
// create the new element
if (debugParser != null) {
debugParser.println("\t\t" + moduleClass + ", " + sflag);
for (String key : options.keySet()) {
debugParser.println("\t\t\t" + key +
"=" + options.get(key));
}
}
configEntries.add(new AppConfigurationEntry(moduleClass,
controlFlag,
options));
}
match("}");
match(";");
// add this configuration entry
if (newConfig.containsKey(appName)) {
throw ioException(
"Configuration.Error.Can.not.specify.multiple.entries.for.appName",
appName);
}
newConfig.put(appName, configEntries);
}
private String match(String expect) throws IOException {
String value = null;
switch(lookahead) {
case StreamTokenizer.TT_EOF:
throw ioException(
"Configuration.Error.expected.expect.read.end.of.file.",
expect);
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 {
throw ioException(
"Configuration.Error.Line.line.expected.expect.found.value.",
new Integer(linenum), expect, st.sval);
}
break;
case '{':
if (expect.equalsIgnoreCase("{")) {
lookahead = nextToken();
} else {
throw ioException(
"Configuration.Error.Line.line.expected.expect.",
new Integer(linenum), expect, st.sval);
}
break;
case ';':
if (expect.equalsIgnoreCase(";")) {
lookahead = nextToken();
} else {
throw ioException(
"Configuration.Error.Line.line.expected.expect.",
new Integer(linenum), expect, st.sval);
}
break;
case '}':
if (expect.equalsIgnoreCase("}")) {
lookahead = nextToken();
} else {
throw ioException(
"Configuration.Error.Line.line.expected.expect.",
new Integer(linenum), expect, st.sval);
}
break;
case '=':
if (expect.equalsIgnoreCase("=")) {
lookahead = nextToken();
} else {
throw ioException(
"Configuration.Error.Line.line.expected.expect.",
new Integer(linenum), expect, st.sval);
}
break;
default:
throw ioException(
"Configuration.Error.Line.line.expected.expect.found.value.",
new Integer(linenum), expect, st.sval);
}
return value;
}
private boolean peek(String expect) {
switch (lookahead) {
case ',':
return expect.equalsIgnoreCase(",");
case ';':
return expect.equalsIgnoreCase(";");
case '{':
return expect.equalsIgnoreCase("{");
case '}':
return expect.equalsIgnoreCase("}");
default:
return false;
}
}
private int nextToken() throws IOException {
int tok;
while ((tok = st.nextToken()) == StreamTokenizer.TT_EOL) {
linenum++;
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