Package org.apache.hadoop.security

Interface Summary

Interface	Description
GroupMappingServiceProvider	An interface for the implementation of a user-to-groups mapping service used by Groups.
IdMappingServiceProvider	An interface for the implementation of <userId, userName> mapping and <groupId, groupName> mapping.

Class Summary

Class	Description
Credentials	A class that provides the facilities of reading and writing secret keys and Tokens.
SecurityUtil	Security Utils.
UserGroupInformation	User and group information for Hadoop.

Enum Summary

Enum	Description
UserGroupInformation.AuthenticationMethod	existing types of authentications' methods

Exception Summary

Exception	Description
AccessControlException	An exception class for access control related issues.
KerberosAuthException	Thrown when UserGroupInformation failed with an unrecoverable error, such as failure in kerberos login/logout, invalid subject etc.