| Name | Description | Type | Package | Framework |
| AuthChallengeException | Signals a failure processing authentication challengeSince:3. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| AuthChallengeParser | This class provides utility methods for parsing HTTP www and proxy authentication Since:2. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| AuthChallengeProcessor | This class provides utility methods for processing HTTP www and proxy authentication Since:3. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| AuthenticationException | Signals a failure in authentication processSince:2. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| AuthPolicy | Authentication policy class. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| AuthScheme | This interface represents an abstract challenge-response oriented authentication scheme. | Interface | org.apache.commons.httpclient.auth | Apache HttpClient |
| AuthSchemeBase | Abstract authentication scheme class that implements AuthScheme interface and provides a default contstructor. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| AuthScope | The class represents an authentication scope consisting of a host name, a port number, a realm name and an authentication scheme name which | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| AuthState | This class provides detailed information about the state of the authentication process. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| BasicScheme | Basic authentication scheme as defined in RFC 2617. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| CredentialsNotAvailableException | Authentication credentials required to respond to a authentication challenge are not available | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| CredentialsProvider | Credentials provider interface can be used to provide HTTP method with a means to request authentication credentials if no credentials have been given or given | Interface | org.apache.commons.httpclient.auth | Apache HttpClient |
| DigestScheme | Digest authentication scheme as defined in RFC 2617. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| HttpAuthenticator | Utility methods for HTTP authorization and authentication. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| HttpAuthRealm | The key used to look up authentication credentials. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| InvalidCredentialsException | Authentication credentials required to respond to a authentication challenge are invalid | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| MalformedChallengeException | Signals that authentication challenge is in some way invalid or illegal in the given context | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| NTLMScheme | An implementation of the Microsoft proprietary NTLM authentication scheme. | Class | org.apache.commons.httpclient.auth | Apache HttpClient |
| RFC2617Scheme | Abstract authentication scheme class that lays foundation for all RFC 2617 compliant authetication schemes and provides capabilities common | Class | org.apache.commons.httpclient.auth | Apache HttpClient |