# Package org.apache.http.auth

Client HTTP authentication APIs.

See: Description

Interface Summary
Interface | Description
--- | ---
AuthScheme | This interface represents an abstract challenge-response oriented authentication scheme.
AuthSchemeFactory | Deprecated (4.3) use `AuthSchemeProvider`
AuthSchemeProvider | 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
Class | Description
--- | ---
AUTH | Constants and static helpers related to the HTTP authentication.
AuthOption |
AuthSchemeRegistry | Deprecated (4.3) use `Registry`
AuthScope | `AuthScope` represents an authentication scope consisting of a host name, a port number, a realm name and an authentication scheme name.
AuthState | This class provides detailed information about the state of the authentication process.
BasicUserPrincipal | Basic user principal used for HTTP authentication
KerberosCredentials | `Credentials` implementation based on GSSCredential for Kerberos 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.

Enum Summary
Enum | Description
--- | ---
AuthProtocolState |
ChallengeState | Challenge mode (TARGET or PROXY)

Exception Summary
Exception | Description
--- | ---
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

Client HTTP authentication APIs.