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## Package org.apache.hadoop.security

Interface Summary
RefreshUserMappingsProtocol | Protocol use

Class Summary
AuthenticationFilterInitializer | Initializes Alfredo AuthenticationFilter which provides support for Kerberos HTTP SPENGO authentication.
Credentials | A class that provides the facilities of reading and writing secret keys and Tokens.
Groups | A user-to-groups mapping service.
JniBasedUnixGroupsMapping | A JNI-based implementation of `GroupMappingServiceProvider` that invokes libC calls to get the group memberships of a given user.
JniBasedUnixGroupsNetgroupMapping | A JNI-based implementation of `GroupMappingServiceProvider` that invokes libC calls to get the group memberships of a given user.
KerberosName | This class implements parsing and handling of Kerberos principal names.
Krb5AndCertsSslSocketConnector | Extend Jetty's `SslSocketConnector` to optionally also provide Kerberos5ized SSL sockets.
Krb5AndCertsSslSocketConnector.Krb5SslFilter | Filter that takes the Kerberos principal identified in the `Krb5AndCertsSslSocketConnector` and provides it the to the servlet at runtime, setting the principal and short name.
NetgroupCache | Class that caches the netgroups and inverts group-to-user map to user-to-group map
SaslInputStream | A SaslInputStream is composed of an InputStream and a SaslServer (or SaslClient) so that read() methods return data that are read in from the underlying InputStream but have been additionally processed by the SaslServer (or SaslClient) object.
SaslOutputStream | A SaslOutputStream is composed of an OutputStream and a SaslServer (or SaslClient) so that write() methods first process the data before writing them out to the underlying OutputStream.
SaslRpcClient | A utility class that encapsulates SASL logic for RPC client
SaslRpcServer | A utility class for dealing with SASL on RPC server
SaslRpcServer.SaslDigestCallbackHandler | CallbackHandler for SASL DIGEST-MD5 mechanism
SaslRpcServer.SaslGssCallbackHandler | CallbackHandler for SASL GSSAPI Kerberos mechanism
SecurityUtil |
ShellBasedUnixGroupsMapping | A simple shell-based implementation of `GroupMappingServiceProvider` that exec's the `groups` shell command to fetch the group memberships of a given user.
ShellBasedUnixGroupsNetgroupMapping | A simple shell-based implementation of `GroupMappingServiceProvider` that exec's the `groups` shell command to fetch the group memberships of a given user.
UserGroupInformation | User and group information for Hadoop.
UserGroupInformation.HadoopLoginModule | A login module that looks at the Kerberos, Unix, or Windows principal and adds the corresponding UserName.

Enum Summary
Krb5AndCertsSslSocketConnector.MODE |
SaslRpcServer.AuthMethod | Authentication method
SaslRpcServer.QualityOfProtection |
SaslRpcServer.SaslStatus |
UserGroupInformation.AuthenticationMethod | existing types of authentications' methods

Exception Summary
AccessControlException | An exception class for access control related issues.
KerberosName.BadFormatString |
KerberosName.NoMatchingRule |

Annotation Types Summary
KerberosInfo | Indicates Kerberos related information to be used

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