Package java.security

Provides the classes and interfaces for the security framework.

See:
Description

Interface Summary

Certificate	Deprecated. A new certificate handling package is created in JDK1.2.
Guard	This interface represents a guard, which is an object that is used to protect access to another object.
Key	The Key interface is the top-level interface for all keys.
Principal	This interface represents the abstract notion of a principal, which can be used to represent any entity, such as an individual, a corporation, and a login id.
PrivateKey	A private key.
PrivilegedAction	A computation to be performed with privileges enabled.
PrivilegedExceptionAction	A computation to be performed with privileges enabled, that throws one or more checked exceptions.
PublicKey	A public key.

Class Summary

AccessControlContext	An AccessControlContext is used to make system resource access decisions based on the context it encapsulates.
AccessController	The AccessController class is used for three purposes: to decide whether an access to a critical system resource is to be allowed or denied, based on the security policy currently in effect, to mark code as being "privileged", thus affecting subsequent access determinations, and to obtain a "snapshot" of the current calling context so access-control decisions from a different context can be made with respect to the saved context.
AlgorithmParameterGenerator	The AlgorithmParameterGenerator class is used to generate a set of parameters to be used with a certain algorithm.
AlgorithmParameterGeneratorSpi	This class defines the Service Provider Interface (SPI) for the AlgorithmParameterGenerator class, which is used to generate a set of parameters to be used with a certain algorithm.
AlgorithmParameters	This class is used as an opaque representation of cryptographic parameters.
AlgorithmParametersSpi	This class defines the Service Provider Interface (SPI) for the AlgorithmParameters class, which is used to manage algorithm parameters.
AllPermission	The AllPermission is a permission that implies all other permissions.
BasicPermission	The BasicPermission class extends the Permission class, and can be used as the base class for permissions that want to follow the same naming convention as BasicPermission.
CodeSource	This class extends the concept of a codebase to encapsulate not only the location (URL) but also the certificate(s) that were used to verify signed code originating from that location.
DigestInputStream	A transparent stream that updates the associated message digest using the bits going through the stream.
DigestOutputStream	A transparent stream that updates the associated message digest using the bits going through the stream.
GuardedObject	A GuardedObject is an object that is used to protect access to another object.
Identity	Deprecated. This class is no longer used.
IdentityScope	Deprecated. This class is no longer used.
KeyFactory	Key factories are used to convert keys (opaque cryptographic keys of type Key) into key specifications (transparent representations of the underlying key material), and vice versa.
KeyFactorySpi	This class defines the Service Provider Interface (SPI) for the KeyFactory class.
KeyPair	This class is a simple holder for a key pair (a public key and a private key).
KeyPairGenerator	The KeyPairGenerator class is used to generate pairs of public and private keys.
KeyPairGeneratorSpi	This class defines the Service Provider Interface (SPI) for the KeyPairGenerator class, which is used to generate pairs of public and private keys.
KeyStore	This class represents an in-memory collection of keys and certificates.
KeyStoreSpi	This class defines the Service Provider Interface (SPI) for the KeyStore class.
MessageDigest	This MessageDigest class provides applications the functionality of a message digest algorithm, such as MD5 or SHA.
MessageDigestSpi	This class defines the Service Provider Interface (SPI) for the MessageDigest class, which provides the functionality of a message digest algorithm, such as MD5 or SHA.
Permission	Abstract class for representing access to a system resource.
PermissionCollection	Abstract class representing a collection of Permission objects.
Permissions	This class represents a heterogeneous collection of Permissions.
Policy	This is an abstract class for representing the system security policy for a Java application environment (specifying which permissions are available for code from various sources).
ProtectionDomain	This ProtectionDomain class encapulates the characteristics of a domain, which encloses a set of classes whose instances are granted the same set of permissions.
Provider	This class represents a "provider" for the Java Security API, where a provider implements some or all parts of Java Security, including: Algorithms (such as DSA, RSA, MD5 or SHA-1).
SecureClassLoader	This class extends ClassLoader with additional support for defining classes with an associated code source and permissions which are retrieved by the system policy by default.
SecureRandom	This class provides a cryptographically strong pseudo-random number generator (PRNG).
SecureRandomSpi	This class defines the Service Provider Interface (SPI) for the SecureRandom class.
Security	This class centralizes all security properties and common security methods.
SecurityPermission	This class is for security permissions.
Signature	This Signature class is used to provide applications the functionality of a digital signature algorithm.
SignatureSpi	This class defines the Service Provider Interface (SPI) for the Signature class, which is used to provide the functionality of a digital signature algorithm.
SignedObject	SignedObject is a class for the purpose of creating authentic runtime objects whose integrity cannot be compromised without being detected.
Signer	Deprecated. This class is no longer used.
UnresolvedPermission	The UnresolvedPermission class is used to hold Permissions that were "unresolved" when the Policy was initialized.

Exception Summary

AccessControlException	This exception is thrown by the AccessController to indicate that a requested access (to a critical system resource such as the file system or the network) is denied.
DigestException	This is the generic Message Digest exception.
GeneralSecurityException	This is the general security exception class, which serves to group all the exception classes of the java.security package that extend from it.
InvalidAlgorithmParameterException	This is the exception for invalid or inappropriate algorithm parameters.
InvalidKeyException	This is the exception for invalid Keys (invalid encoding, wrong length, uninitialized, etc).
InvalidParameterException	This exception is thrown when an invalid parameter is passed to a method.
KeyException	This is the basic key exception.
KeyManagementException	This is the general key management exception, for all operations dealing with key management.
KeyStoreException	This is the generic KeyStore exception.
NoSuchAlgorithmException	This exception is thrown when a particular cryptographic algorithm is requested but is not available in the environment.
NoSuchProviderException	This exception is thrown when a particular security provider is requested but is not available in the environment.
PrivilegedActionException	This exception is thrown by doPrivileged(PrivilegedExceptionAction) and doPrivileged(PrivilegedExceptionAction, AccessControlContext context) to indicate that the action being performed threw a checked exception.
ProviderException	A runtime exception for Provider exceptions (such as misconfiguration errors), which may be subclassed by Providers to throw specialized, provider-specific runtime errors.
SignatureException	This is the generic Signature exception.
UnrecoverableKeyException	This exception is thrown if a key in the keystore cannot be recovered.

Package java.security Description

Provides the classes and interfaces for the security framework. This includes classes that implement an easily configurable, fine-grained access control security architecture. This package also supports the generation and storage of cryptographic public key pairs, as well as a number of exportable cryptographic operations including those for message digest and signature generation. Finally, this package provides classes that support signed/guarded objects and secure random number generation. Many of the classes provided in this package (the cryptographic and secure random number generator classes in particular) are provider-based. The class itself defines a programming interface to which applications may write. The implementations themselves may then be written by independent third-party vendors and plugged in seamlessly as needed. Therefore application developers may take advantage of any number of provider-based implementations without having to add or rewrite code.

Package Specification

• PKCS8: Private-Key Information Standard, Version 1.2, November 1993

Related Documentation

For further documentation, please see:

• Security Architecture
• Cryptography Architecture
• How to Implement a Provider for the Java Cryptography Architecture
• Default Policy Implementation and Policy File Syntax
• Policy Permissions
• Security Tools Summary
• keytool (for Solaris) (for Windows)
• jarsigner (for Solaris) (for Windows)

Since:

JDK1.1