Contains class and interfaces for supporting SASL. This package defines classes and interfaces for SASL mechanisms. It is used by developers to add authentication support for connection-based protocols that use SASL.
SASL OverviewSimple Authentication and Security Layer (SASL) specifies a challenge-response protocol in which data is exchanged between the client and the server for the purposes of authentication and (optional) establishment of a security layer on which to carry on subsequent communications. It is used with connection-based protocols such as LDAPv3 or IMAPv4. SASL is described in RFC 2222. There are various mechanisms defined for SASL. Each mechanism defines the data that must be exchanged between the client and server in order for the authentication to succeed. This data exchange required for a particular mechanism is referred to to as its protocol profile. The following are some examples of mechanisms that have been defined by the Internet standards community.
- DIGEST-MD5 (RFC 2831). This mechanism defines how HTTP Digest Authentication can be used as a SASL mechanism.
- Anonymous (RFC 2245). This mechanism is anonymous authentication in which no credentials are necessary.
- External (RFC 2222). This mechanism obtains authentication information from an external source (such as TLS or IPsec).
- S/Key (RFC 2222). This mechanism uses the MD4 digest algorithm to exchange data based on a shared secret.
- GSSAPI (RFC 2222). This mechanism uses the GSSAPI for obtaining authentication information.
UsageUsers of this API are typically developers who produce client library implementations for connection-based protocols, such as LDAPv3 and IMAPv4, and developers who write servers (such as LDAP servers and IMAP servers). Developers who write client libraries use the
SaslClientFactoryinterfaces. Developers who write servers use the
SaslServerFactoryinterfaces. Among these two groups of users, each can be further divided into two groups: those who produce the SASL mechanisms and those who use the SASL mechanisms. The producers of SASL mechanisms need to provide implementations for these interfaces, while users of the SASL mechanisms use the APIs in this package to access those implementations.
Related DocumentationPlease refer to the Java SASL Programming Guide for information on how to use this API.
Class Summary Class Description AuthorizeCallbackThis callback is used by
SaslServerto determine whether one entity (identified by an authenticated authentication id) can act on behalf of another entity (identified by an authorization id).
RealmCallbackThis callback is used by
SaslServerto retrieve realm information.
RealmChoiceCallbackThis callback is used by
SaslServerto obtain a realm given a list of realm choices.
SaslA static class for creating SASL clients and servers.
Exception Summary Exception Description AuthenticationExceptionThis exception is thrown by a SASL mechanism implementation to indicate that the SASL exchange has failed due to reasons related to authentication, such as an invalid identity, passphrase, or key. SaslExceptionThis class represents an error that has occurred when using SASL.