#CITYENGINE ACCESS VIOLATION JAVA CODE#

The behavior of these methods is similar to that for the getPrincipals methods, except in this case the public credentials are being obtained. Public Set getPublicCredentials(Class c) To retrieve the public credentials associated with a Subject, these methods are available: An empty set will be returned if the Subject does not have any associated Principals. The first method returns all Principals contained in the Subject, while the second method only returns those Principals that are an instance of the specified Class c, or an instance of a subclass of Class c. To retrieve the Principals associated with a Subject, two methods are available: The following method may be called to test a Subject's read-only state: Once in a read-only state, any attempt to add or remove Principals or credentials will result in an IllegalStateException being thrown. If a Subject was not instantiated to be in a read-only state, it can be set read-only by calling the following method:ДЄ with target 'setReadOnly' is required to invoke this method. If the application instantiates a LoginContext and does not pass a Subject to the LoginContext constructor, the LoginContext instantiates a new empty Subject. In a read-only Subject, the Principal and credential Sets are immutable.ДЄn application writer does not have to instantiate a Subject. It also has a boolean argument which can be used to make the Subject read-only. The second constructor creates a Subject with the specified Sets of Principals and credentials. The first constructor creates a Subject with empty (non-null) Sets of Principals and credentials. Set pubCredentials, Set privCredentials) Public Subject(boolean readOnly, Set principals, Subjects are created using these constructors: public Subject() Permissions are required to access and modify the different credential Credentials intended to be shared, such as public keyД¬ertificates, are stored within a public credential Set. Such as private cryptographic keys, are stored within a private credential Sensitive credentials that require special protection, Referred to as credentials see the section Credentials. For example, a person may have a name Principal ('John Doe') and a SSN Principal ('123-45-6789'), which distinguish it from other subjects.ДЄ Subject may also own security-related attributes, which are Once the subject is authenticated, a is populated with associated identities, or Principals. A subject may be any entity, such as a person or a service. The JAAS framework defines the term subject to represent the source of a request. To authorize access to resources, applications first need to authenticate the source of the request.

The Subject is updated by a LoginModule with relevant Principals and credentials if authentication succeeds.

Access control decisions are based both on the executing code's CodeSource and on the user or service running the code, who is represented by a Subject object.

#CITYENGINE ACCESS VIOLATION JAVA CODE#

Once the user or service executing the code has been authenticated, the JAAS authorization component works in conjunction with the core Java SE access control model to protect access to sensitive resources. Others may read and verify a voice or fingerprint sample. Typical LoginModules may prompt for and verify a user name and password. Applications enable the authentication process by instantiating a LoginContext object, which in turn references a Configuration to determine the authentication technology or technologies, or LoginModule(s), to be used in performing the authentication.

New or updated authentication technologies can be plugged under an application without requiring modifications to the application itself. This permits applications to remain independent from underlying authentication technologies. JAAS authentication is performed in a pluggable fashion. JAAS provides a framework that augments the Java security architecture with such support. It lacked, however, the ability to additionally enforce access controls based on who runs the code. Traditionally Java has provided codesource-based access controls (access controls based on where the code originated from and who signed the code). JAAS implements a Java version of the standard Pluggable Authentication Module (PAM) framework.

for authorization of users to ensure they have the access control rights (permissions) required to do the actions performed.

for authentication of users, to reliably and securely determine who is currently executing Java code, regardless of whether the code is running as an application, an applet, a bean, or a servlet and.

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