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 KERBEROS_V5 mechanisms.

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.

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