Security

public final class Security extends Object

This class centralizes all security properties and common security methods. One of its primary uses is to manage providers.

Public Method Summary

static int
addProvider(Provider provider)
Adds a provider to the next position available.
static String
getAlgorithmProperty(String algName, String propName)
This method was deprecated. This method used to return the value of a proprietary property in the master file of the "SUN" Cryptographic Service Provider in order to determine how to parse algorithm-specific parameters. Use the new provider-based and algorithm-independent AlgorithmParameters and KeyFactory engine classes (introduced in the J2SE version 1.2 platform) instead.
static Set<String>
getAlgorithms(String serviceName)
Returns a Set of Strings containing the names of all available algorithms or types for the specified Java cryptographic service (e.g., Signature, MessageDigest, Cipher, Mac, KeyStore).
static String
getProperty(String key)
Gets a security property value.
static Provider
getProvider(String name)
Returns the provider installed with the specified name, if any.
static Provider[]
getProviders(Map<StringString> filter)
Returns an array containing all installed providers that satisfy the specified* selection criteria, or null if no such providers have been installed.
static Provider[]
getProviders()
Returns an array containing all the installed providers.
static Provider[]
getProviders(String filter)
Returns an array containing all installed providers that satisfy the specified selection criterion, or null if no such providers have been installed.
synchronized static int
insertProviderAt(Provider provider, int position)
Adds a new provider, at a specified position.
synchronized static void
removeProvider(String name)
Removes the provider with the specified name.
static void
setProperty(String key, String datum)
Sets a security property value.

Inherited Method Summary

Public Methods

public static int addProvider (Provider provider)

Adds a provider to the next position available.

First, if there is a security manager, its checkSecurityAccess method is called with the string "insertProvider."+provider.getName() to see if it's ok to add a new provider. If the default implementation of checkSecurityAccess is used (i.e., that method is not overriden), then this will result in a call to the security manager's checkPermission method with a SecurityPermission("insertProvider."+provider.getName()) permission.

Parameters
provider the provider to be added.
Returns
  • the preference position in which the provider was added, or -1 if the provider was not added because it is already installed.
Throws
NullPointerException if provider is null
SecurityException if a security manager exists and its checkSecurityAccess(String) method denies access to add a new provider

public static String getAlgorithmProperty (String algName, String propName)

This method was deprecated.
This method used to return the value of a proprietary property in the master file of the "SUN" Cryptographic Service Provider in order to determine how to parse algorithm-specific parameters. Use the new provider-based and algorithm-independent AlgorithmParameters and KeyFactory engine classes (introduced in the J2SE version 1.2 platform) instead.

Gets a specified property for an algorithm. The algorithm name should be a standard name. See the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard algorithm names. One possible use is by specialized algorithm parsers, which may map classes to algorithms which they understand (much like Key parsers do).

Parameters
algName the algorithm name.
propName the name of the property to get.
Returns
  • the value of the specified property.

public static Set<String> getAlgorithms (String serviceName)

Returns a Set of Strings containing the names of all available algorithms or types for the specified Java cryptographic service (e.g., Signature, MessageDigest, Cipher, Mac, KeyStore). Returns an empty Set if there is no provider that supports the specified service or if serviceName is null. For a complete list of Java cryptographic services, please see the Java Cryptography Architecture API Specification & Reference. Note: the returned set is immutable.

Parameters
serviceName the name of the Java cryptographic service (e.g., Signature, MessageDigest, Cipher, Mac, KeyStore). Note: this parameter is case-insensitive.
Returns
  • a Set of Strings containing the names of all available algorithms or types for the specified Java cryptographic service or an empty set if no provider supports the specified service.

public static String getProperty (String key)

Gets a security property value.

First, if there is a security manager, its checkPermission method is called with a java.security.SecurityPermission("getProperty."+key) permission to see if it's ok to retrieve the specified security property value..

Parameters
key the key of the property being retrieved.
Returns
  • the value of the security property corresponding to key.
Throws
SecurityException if a security manager exists and its checkPermission(Permission) method denies access to retrieve the specified security property value
NullPointerException is key is null

public static Pro