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