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SASL_CALLBACKS(3) Cyrus SASL SASL_CALLBACKS(3)

NAME

sasl_callbacks - Cyrus SASL documentation

SYNOPSIS

#include <sasl/sasl.h>

DESCRIPTION

sasl_callbacks are used when the application needs some information from the application. Common reasons are getting for getting usernames and passwords. A client MUST specify what callbacks they support in the sasl_client_init(3)/sasl_server_init(3) or sasl_client_new(3)/sasl_server_new(3) calls. If an authentication mechanism needs a callback that the application does not state it supports it cannot be used.

If a callback has an id parameter that should be checked to make sure you are giving the appropriate value.

If an application is using the client side of the library functions to handle the callbacks are not necessary. Instead the application may deal with callbacks via SASL_INTERACT’s. See sasl_client_start(3)/sasl_client_step(3) for more information.

Common Callbacks

Get an option value
Log message handler
Get path to search for plugins (e.g. SASL mechanisms)
Verify files for use by SASL
sasl_canon_user_t(3)
Username canonicalization function

Client-only Callbacks

Get user/language list
Get authentication secret
sasl_chalprompt_t(3)
Display challenge and prompt for response
Get the realm for authentication

Server-only Callbacks

sasl_authorize_t(3)
Authorize policy callback
verify plaintext password
set plaintext password
Get path to search for SASL configuration file (server side only). New in SASL 2.1.22.

RETURN VALUE

SASL callback functions should return SASL return codes. See sasl_errors(3) for a complete list. SASL_OK typically indicates success.

CONFORMING TO

RFC 4422

SEE ALSO

sasl(3), sasl_errors(3), sasl_authorize_t(3), sasl_log_t(3), sasl_getpath_t(3), sasl_getconfpath_t(3), sasl_verifyfile_t(3), sasl_canon_user_t(3), sasl_getsimple_t(3), sasl_getsecret_t(3), sasl_chalprompt_t(3), sasl_getrealm_t(3), sasl_server_userdb_checkpass_t(3), sasl_server_userdb_setpass_t(3)

AUTHOR

The Cyrus Team

COPYRIGHT

1993-2021, The Cyrus Team

February 12, 2021 2.1.27