/**
* Gets a security property value.
*
* <p>First, if there is a security manager, its <code>checkPermission</code> method is called
* with a <code>java.security.SecurityPermission("getProperty."+key)</code> permission to see if
* it's ok to retrieve the specified security property value..
*
* @param key the key of the property being retrieved.
* @return the value of the security property corresponding to key.
* @throws SecurityException if a security manager exists and its <code>{@link
* java.lang.SecurityManager#checkPermission}</code> method denies access to retrieve the
* specified security property value
* @throws NullPointerException is key is null
* @see #setProperty
* @see java.security.SecurityPermission
*/
public static String getProperty(String key) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(new SecurityPermission("getProperty." + key));
}
String name = props.getProperty(key);
if (name != null) name = name.trim(); // could be a class name with trailing ws
return name;
}
/*
* Initialize to default values, if <java.home>/lib/java.security
* is not found.
*/
private static void initializeStatic() {
props.put("security.provider.1", "sun.security.provider.Sun");
props.put("security.provider.2", "sun.security.rsa.SunRsaSign");
props.put("security.provider.3", "com.sun.net.ssl.internal.ssl.Provider");
props.put("security.provider.4", "com.sun.crypto.provider.SunJCE");
props.put("security.provider.5", "sun.security.jgss.SunProvider");
props.put("security.provider.6", "com.sun.security.sasl.Provider");
}
/**
* Sets a security property value.
*
* <p>First, if there is a security manager, its <code>checkPermission</code> method is called
* with a <code>java.security.SecurityPermission("setProperty."+key)</code> permission to see if
* it's ok to set the specified security property value.
*
* @param key the name of the property to be set.
* @param datum the value of the property to be set.
* @throws SecurityException if a security manager exists and its <code>{@link
* java.lang.SecurityManager#checkPermission}</code> method denies access to set the
* specified security property value
* @throws NullPointerException if key or datum is null
* @see #getProperty
* @see java.security.SecurityPermission
*/
public static void setProperty(String key, String datum) {
check("setProperty." + key);
props.put(key, datum);
invalidateSMCache(key); /* See below. */
}
private static void initialize() {
props = new Properties();
boolean loadedProps = false;
boolean overrideAll = false;
// first load the system properties file
// to determine the value of security.overridePropertiesFile
File propFile = securityPropFile("java.security");
if (propFile.exists()) {
try {
FileInputStream fis = new FileInputStream(propFile);
InputStream is = new BufferedInputStream(fis);
props.load(is);
is.close();
loadedProps = true;
if (sdebug != null) {
sdebug.println("reading security properties file: " + propFile);
}
} catch (IOException e) {
if (sdebug != null) {
sdebug.println("unable to load security properties from " + propFile);
e.printStackTrace();
}
}
}
if ("true".equalsIgnoreCase(props.getProperty("security.overridePropertiesFile"))) {
String extraPropFile = System.getProperty("java.security.properties");
if (extraPropFile != null && extraPropFile.startsWith("=")) {
overrideAll = true;
extraPropFile = extraPropFile.substring(1);
}
if (overrideAll) {
props = new Properties();
if (sdebug != null) {
sdebug.println("overriding other security properties files!");
}
}
// now load the user-specified file so its values
// will win if they conflict with the earlier values
if (extraPropFile != null) {
try {
URL propURL;
extraPropFile = PropertyExpander.expand(extraPropFile);
propFile = new File(extraPropFile);
if (propFile.exists()) {
propURL = new URL("file:" + propFile.getCanonicalPath());
} else {
propURL = new URL(extraPropFile);
}
BufferedInputStream bis = new BufferedInputStream(propURL.openStream());
props.load(bis);
bis.close();
loadedProps = true;
if (sdebug != null) {
sdebug.println("reading security properties file: " + propURL);
if (overrideAll) {
sdebug.println("overriding other security properties files!");
}
}
} catch (Exception e) {
if (sdebug != null) {
sdebug.println("unable to load security properties from " + extraPropFile);
e.printStackTrace();
}
}
}
}
if (!loadedProps) {
initializeStatic();
if (sdebug != null) {
sdebug.println("unable to load security properties " + "-- using defaults");
}
}
}