Simple Authentication and Security Layer with
authentication mechanisms:
getpwent, kerberos5, pam, rimap, shadow, ldap, sql, otp

Internal Program Version:  Cyrus SASL 2.1.26  (The HEADER-Files)

SASL is the Simple Authentication and Security Layer, a method for
adding authentication support to connection-based protocols. To use
SASL, a protocol includes a command for identifying and authenticating
a user to a server and for optionally negotiating protection of
subsequent protocol interactions. If its use is negotiated, a
security layer is inserted between the protocol and the connection.

http://asg.web.cmu.edu/sasl