## Package org.apache.http.auth

The API for client-side HTTP authentication against a server.

See:
Description

Interface Summary
AuthScheme: This interface represents an abstract challenge-response oriented authentication scheme.
AuthSchemeFactory: Factory for `AuthScheme` implementations.
ContextAwareAuthScheme: This interface represents an extended authentication scheme that requires access to `HttpContext` in order to generate an authorization string.
Credentials: This interface represents a set of credentials consisting of a security principal and a secret (password) that can be used to establish user identity

Class Summary
AUTH: Constants and static helpers related to the HTTP authentication.
AuthSchemeRegistry: Authentication scheme registry that can be used to obtain the corresponding authentication scheme implementation for a given type of authorization challenge.
AuthScope: The class represents an authentication scope consisting of a host name, a port number, a realm name and an authentication scheme name which `Credentials` apply to.
AuthState: This class provides detailed information about the state of the authentication process.
BasicUserPrincipal: Basic user principal used for HTTP authentication
NTCredentials: `Credentials` implementation for Microsoft Windows platforms that includes Windows specific attributes such as name of the domain the user belongs to.
NTUserPrincipal: Microsoft Windows specific user principal implementation.
UsernamePasswordCredentials: Simple `Credentials` implementation based on a user name / password pair.

Exception Summary
AuthenticationException: Signals a failure in authentication process
InvalidCredentialsException: Authentication credentials required to respond to a authentication challenge are invalid
MalformedChallengeException: Signals that authentication challenge is in some way invalid or illegal in the given context

## Package org.apache.http.auth Description

The API for client-side HTTP authentication against a server.

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