Class AuthenticationContext

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable

    public final class AuthenticationContext
    extends java.lang.Object
    implements java.io.Closeable
    A glorified map of key value pairs holding (cleartext) authentication data. Authentication contexts are used internally when network operations need to access secured repositories or proxies. Each authentication context manages the credentials required to access a single host. Unlike Authentication callbacks which exist for a potentially long time like the duration of a repository system session, an authentication context has a supposedly short lifetime and should be closed as soon as the corresponding network operation has finished:
     AuthenticationContext context = AuthenticationContext.forRepository( session, repository );
     try {
         // get credentials
         char[] password = context.get( AuthenticationContext.PASSWORD, char[].class );
         // perform network operation using retrieved credentials
         ...
     } finally {
         // erase confidential authentication data from heap memory
         AuthenticationContext.close( context );
     }
     
    The same authentication data can often be presented using different data types, e.g. a password can be presented using a character array or (less securely) using a string. For ease of use, an authentication context treats the following groups of data types as equivalent and converts values automatically during retrieval:
    • String, char[]
    • String, File
    An authentication context is thread-safe.
    • Field Detail

      • USERNAME

        public static final java.lang.String USERNAME
        The key used to store the username. The corresponding authentication data should be of type String.
        See Also:
        Constant Field Values
      • PASSWORD

        public static final java.lang.String PASSWORD
        The key used to store the password. The corresponding authentication data should be of type char[] or String.
        See Also:
        Constant Field Values
      • NTLM_DOMAIN

        public static final java.lang.String NTLM_DOMAIN
        The key used to store the NTLM domain. The corresponding authentication data should be of type String.
        See Also:
        Constant Field Values
      • NTLM_WORKSTATION

        public static final java.lang.String NTLM_WORKSTATION
        The key used to store the NTML workstation. The corresponding authentication data should be of type String.
        See Also:
        Constant Field Values
      • PRIVATE_KEY_PATH

        public static final java.lang.String PRIVATE_KEY_PATH
        The key used to store the pathname to a private key file. The corresponding authentication data should be of type String or File.
        See Also:
        Constant Field Values
      • PRIVATE_KEY_PASSPHRASE

        public static final java.lang.String PRIVATE_KEY_PASSPHRASE
        The key used to store the passphrase protecting the private key. The corresponding authentication data should be of type char[] or String.
        See Also:
        Constant Field Values
      • HOST_KEY_ACCEPTANCE

        public static final java.lang.String HOST_KEY_ACCEPTANCE
        The key used to store the acceptance policy for unknown host keys. The corresponding authentication data should be of type Boolean. When querying this authentication data, the extra data should provide HOST_KEY_REMOTE and HOST_KEY_LOCAL, e.g. to enable a well-founded decision of the user during an interactive prompt.
        See Also:
        Constant Field Values
      • HOST_KEY_REMOTE

        public static final java.lang.String HOST_KEY_REMOTE
        The key used to store the fingerprint of the public key advertised by remote host. Note that this key is used to query the extra data passed to get(String, Map, Class) when getting HOST_KEY_ACCEPTANCE, not the authentication data in a context.
        See Also:
        Constant Field Values
      • HOST_KEY_LOCAL

        public static final java.lang.String HOST_KEY_LOCAL
        The key used to store the fingerprint of the public key expected from remote host as recorded in a known hosts database. Note that this key is used to query the extra data passed to get(String, Map, Class) when getting HOST_KEY_ACCEPTANCE, not the authentication data in a context.
        See Also:
        Constant Field Values
      • SSL_CONTEXT

        public static final java.lang.String SSL_CONTEXT
        The key used to store the SSL context. The corresponding authentication data should be of type SSLContext.
        See Also:
        Constant Field Values
      • SSL_HOSTNAME_VERIFIER

        public static final java.lang.String SSL_HOSTNAME_VERIFIER
        The key used to store the SSL hostname verifier. The corresponding authentication data should be of type HostnameVerifier.
        See Also:
        Constant Field Values
      • proxy

        private final Proxy proxy
      • authData

        private final java.util.Map<java.lang.String,​java.lang.Object> authData
      • fillingAuthData

        private boolean fillingAuthData
    • Method Detail

      • forRepository

        public static AuthenticationContext forRepository​(RepositorySystemSession session,
                                                          RemoteRepository repository)
        Gets an authentication context for the specified repository.
        Parameters:
        session - The repository system session during which the repository is accessed, must not be null.
        repository - The repository for which to create an authentication context, must not be null.
        Returns:
        An authentication context for the repository or null if no authentication is configured for it.
      • forProxy

        public static AuthenticationContext forProxy​(RepositorySystemSession session,
                                                     RemoteRepository repository)
        Gets an authentication context for the proxy of the specified repository.
        Parameters:
        session - The repository system session during which the repository is accessed, must not be null.
        repository - The repository for whose proxy to create an authentication context, must not be null.
        Returns:
        An authentication context for the proxy or null if no proxy is set or no authentication is configured for it.
      • getSession

        public RepositorySystemSession getSession()
        Gets the repository system session during which the authentication happens.
        Returns:
        The repository system session, never null.
      • getRepository

        public RemoteRepository getRepository()
        Gets the repository requiring authentication. If getProxy() is not null, the data gathered by this authentication context does not apply to the repository's host but rather the proxy.
        Returns:
        The repository to be contacted, never null.
      • getProxy

        public Proxy getProxy()
        Gets the proxy (if any) to be authenticated with.
        Returns:
        The proxy or null if authenticating directly with the repository's host.
      • get

        public java.lang.String get​(java.lang.String key)
        Gets the authentication data for the specified key.
        Parameters:
        key - The key whose authentication data should be retrieved, must not be null.
        Returns:
        The requested authentication data or null if none.
      • get

        public <T> T get​(java.lang.String key,
                         java.lang.Class<T> type)
        Gets the authentication data for the specified key.
        Type Parameters:
        T - The data type of the authentication data.
        Parameters:
        key - The key whose authentication data should be retrieved, must not be null.
        type - The expected type of the authentication data, must not be null.
        Returns:
        The requested authentication data or null if none or if the data doesn't match the expected type.
      • get

        public <T> T get​(java.lang.String key,
                         java.util.Map<java.lang.String,​java.lang.String> data,
                         java.lang.Class<T> type)
        Gets the authentication data for the specified key.
        Type Parameters:
        T - The data type of the authentication data.
        Parameters:
        key - The key whose authentication data should be retrieved, must not be null.
        data - Any (read-only) extra data in form of key value pairs that might be useful when getting the authentication data, may be null.
        type - The expected type of the authentication data, must not be null.
        Returns:
        The requested authentication data or null if none or if the data doesn't match the expected type.
      • convert

        private <T> T convert​(java.lang.Object value,
                              java.lang.Class<T> type)
      • put

        public void put​(java.lang.String key,
                        java.lang.Object value)
        Puts the specified authentication data into this context. This method should only be called from implementors of Authentication.fill(AuthenticationContext, String, Map). Passed in character arrays are not cloned and become owned by this context, i.e. get erased when the context gets closed.
        Parameters:
        key - The key to associate the authentication data with, must not be null.
        value - The (cleartext) authentication data to store, may be null.
      • close

        public void close()
        Closes this authentication context and erases sensitive authentication data from heap memory. Closing an already closed context has no effect.
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
      • close

        public static void close​(AuthenticationContext context)
        Closes the specified authentication context. This is a convenience method doing a null check before calling close() on the given context.
        Parameters:
        context - The authentication context to close, may be null.