org.apache.http.impl.auth
Interfaces 
NTLMEngine
SpnegoTokenGenerator
Classes 
AuthSchemeBase
BasicScheme
BasicSchemeFactory
CredSspScheme
CredSspSchemeFactory
DigestScheme
DigestSchemeFactory
GGSSchemeBase
HttpAuthenticator
KerberosScheme
KerberosSchemeFactory
NegotiateScheme
NegotiateSchemeFactory
NTLMScheme
NTLMSchemeFactory
RFC2617Scheme
SPNegoScheme
SPNegoSchemeFactory
Exceptions 
NTLMEngineException
UnsupportedDigestAlgorithmException