See: Description
| Interface | Description | 
|---|---|
| NTLMEngine | Abstract NTLM authentication engine. | 
| Class | Description | 
|---|---|
| AuthChallengeParser | Authentication challenge parser. | 
| BasicAuthCache | Default implementation of  AuthCache. | 
| BasicCredentialsProvider | Default implementation of  CredentialsStore. | 
| BasicScheme | Basic authentication scheme as defined in RFC 2617. | 
| BasicSchemeFactory | AuthSchemeFactoryimplementation that creates and initializesBasicSchemeinstances. | 
| DigestScheme | Digest authentication scheme as defined in RFC 2617. | 
| DigestSchemeFactory | AuthSchemeFactoryimplementation that creates and initializesDigestSchemeinstances. | 
| GGSSchemeBase | Common behavior for  GSSbased authentication schemes. | 
| HttpAuthenticator | Utility class that implements commons aspects of the client side HTTP authentication. | 
| KerberosScheme | Kerberos authentication scheme. | 
| KerberosSchemeFactory | AuthSchemeFactoryimplementation that creates and initializesKerberosSchemeinstances. | 
| NTLMScheme | NTLM is a proprietary authentication scheme developed by Microsoft
 and optimized for Windows platforms. | 
| NTLMSchemeFactory | AuthSchemeFactoryimplementation that creates and initializesNTLMSchemeinstances configured to use the defaultNTLMEngineimplementation. | 
| SPNegoScheme | SPNEGO (Simple and Protected GSSAPI Negotiation Mechanism) authentication
 scheme. | 
| SPNegoSchemeFactory | AuthSchemeFactoryimplementation that creates and initializesSPNegoSchemeinstances. | 
| SystemDefaultCredentialsProvider | Implementation of  CredentialsStorebacked by standard
 JREAuthenticator. | 
| Exception | Description | 
|---|---|
| NTLMEngineException | Signals NTLM protocol failure. | 
| UnsupportedDigestAlgorithmException | Authentication credentials required to respond to a authentication
 challenge are invalid | 
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