## Package org.apache.hadoop.security.authentication.server

Interface Summary
AuthenticationHandler: Interface for server authentication mechanisms.

Class Summary
AuthenticationFilter: The `AuthenticationFilter` enables protecting web application resources with different (pluggable) authentication mechanisms.
AuthenticationToken: The `AuthenticationToken` contains information about an authenticated HTTP client and doubles as the `Principal` to be returned by authenticated `HttpServletRequest`s The token can be serialized/deserialized to and from a string as it is sent and received in HTTP client responses and requests as a HTTP cookie (this is done by the `AuthenticationFilter`).
KerberosAuthenticationHandler: The `KerberosAuthenticationHandler` implements the Kerberos SPNEGO authentication mechanism for HTTP.
PseudoAuthenticationHandler: The `PseudoAuthenticationHandler` provides a pseudo authentication mechanism that accepts the user name specified as a query string parameter.

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