NAME

       sasl_client_step - Cyrus SASL documentation

SYNOPSIS

       #include <sasl/sasl.h>

       int sasl_client_step(sasl_conn_t *conn,
                      const char *serverin,
                      unsigned serverinlen,
                      sasl_interact_t ** prompt_need,
                      const char ** clientout,
                      unsigned * clientoutlen);

DESCRIPTION

       int sasl_client_step(sasl_conn_t *conn,

       const char *serverin,

       unsigned serverinlen,

       sasl_interact_t ** prompt_need,

       const char ** clientout,

       unsigned * clientoutlen);
              sasl_client_step() performs a step in  the  authentication negotiation.  It returns SASL_OK if the
              whole  negotiation is successful and SASL_CONTINUE if this step is ok but  at least  one more step
              is needed. A client should not assume an authentication negotiation is successful   just   because
              the  server   signaled   success   via   protocol (i.e. if the server  said  “.  OK Authentication
              succeeded”  in  IMAP, sasl_client_step should still be called one more time with a serverinlen  of
              zero.

              If  SASL_INTERACT  is  returned  the  library  needs some values to  be  filled  in  before it can
              proceed. The prompt_need structure will  be  filled  in  with  requests.  The  application  should
              fulfill    these  requests  and  call  sasl_client_start  again  with  identical  parameters  (the
              prompt_need parameter will  be  the  same pointer as before but filled in by the application).

              Parameters

                     • conn – is the SASL connection context

                     • serverin – is the data given by the server (decoded  if  the  protocol  encodes  requests
                       sent over the wire)

                     • serverinlen – is the length of serverin

                     • clientout  – is created. It is  the  initial client  response  to  send to the server. It
                       is the job of the client to send it  over  the  network  to  the  server.   Any  protocol
                       specific encoding (such as base64 encoding) nec‐ essary needs to be done by the client.

                     • clientoutlen – length of clientout.

RETURN VALUE

       SASL  callback  functions should return SASL return codes.  See sasl.h for a complete list. SASL_CONTINUE
       indicates  success and that there are more steps needed in the authentication. SASL_OK indicates that the
       authentication is complete.

       Other return codes indicate errors and should either be handled or the authentication session  should  be
       quit.

SEE ALSO

       RFC      4422,:saslman:sasl(3),      sasl_callbacks(3),      sasl_client_init(3),     sasl_client_new(3),
       sasl_client_start(3), sasl_errors(3)

AUTHOR

       The Cyrus Team

COPYRIGHT

       1993-2022, The Cyrus Team

2.1.27                                          February 15, 2022                            SASL_CLIENT_STEP(3)