May 26, 2018
GNU SASL Library
GNU SASL is an implementation of the Simple Authentication and Security Layer framework and a few common SASL mechanisms. SASL is used by network servers e.g., IMAP, SMTP to request authentication from clients, and in clients to authenticate against servers.
GNU SASL contains a library
libgsasl', a command line utility gsasl’ to
access the library from the shell, and a manual. The library includes support
for the SASL framework with authentication functions and application data
privacy and integrity functions and at least partial support for the CRAM-MD5,
EXTERNAL, GSSAPI, ANONYMOUS, PLAIN, SECURID, DIGEST-MD5, LOGIN, NTLM and
The library is portable because it does not do network communication by itself, but rather leaves it up to the calling application. The library is flexible with regards to the authorization infrastructure used, as it utilizes callbacks into the application to decide whether an user is authorized or not.