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https://github.com/linux-pam/linux-pam.git
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113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
/* pam_start.c */
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/* Creator Marc Ewing
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* Maintained by AGM
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*
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* $Id$
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*
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*/
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#include <ctype.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <syslog.h>
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#include "pam_private.h"
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int pam_start (
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const char *service_name,
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const char *user,
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const struct pam_conv *pam_conversation,
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pam_handle_t **pamh)
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{
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D(("called pam_start: [%s] [%s] [%p] [%p]"
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,service_name, user, pam_conversation, pamh));
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if ((*pamh = calloc(1, sizeof(**pamh))) == NULL) {
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_pam_system_log(LOG_CRIT, "pam_start: calloc failed for *pamh");
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return (PAM_BUF_ERR);
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}
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if (service_name) {
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char *tmp;
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if (((*pamh)->service_name = _pam_strdup(service_name)) == NULL) {
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_pam_system_log(LOG_CRIT,
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"pam_start: _pam_strdup failed for service name");
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_pam_drop(*pamh);
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return (PAM_BUF_ERR);
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}
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for (tmp=(*pamh)->service_name; *tmp; ++tmp)
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*tmp = tolower(*tmp); /* require lower case */
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} else
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(*pamh)->service_name = NULL;
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if (user) {
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if (((*pamh)->user = _pam_strdup(user)) == NULL) {
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_pam_system_log(LOG_CRIT,
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"pam_start: _pam_strdup failed for user");
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_pam_drop((*pamh)->service_name);
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_pam_drop(*pamh);
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return (PAM_BUF_ERR);
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}
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} else
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(*pamh)->user = NULL;
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(*pamh)->tty = NULL;
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(*pamh)->prompt = NULL; /* prompt for pam_get_user() */
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(*pamh)->ruser = NULL;
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(*pamh)->rhost = NULL;
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(*pamh)->authtok = NULL;
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(*pamh)->oldauthtok = NULL;
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(*pamh)->fail_delay.delay_fn_ptr = NULL;
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(*pamh)->former.choice = PAM_NOT_STACKED;
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if (pam_conversation == NULL
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|| ((*pamh)->pam_conversation = (struct pam_conv *)
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malloc(sizeof(struct pam_conv))) == NULL) {
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_pam_system_log(LOG_CRIT, "pam_start: malloc failed for pam_conv");
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_pam_drop((*pamh)->service_name);
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_pam_drop((*pamh)->user);
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_pam_drop(*pamh);
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return (PAM_BUF_ERR);
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} else {
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memcpy((*pamh)->pam_conversation, pam_conversation,
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sizeof(struct pam_conv));
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}
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(*pamh)->data = NULL;
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if ( _pam_make_env(*pamh) != PAM_SUCCESS ) {
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_pam_system_log(LOG_ERR,"pam_start: failed to initialize environment");
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_pam_drop((*pamh)->service_name);
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_pam_drop((*pamh)->user);
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_pam_drop(*pamh);
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return PAM_ABORT;
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}
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_pam_reset_timer(*pamh); /* initialize timer support */
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_pam_start_handlers(*pamh); /* cannot fail */
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/* According to the SunOS man pages, loading modules and resolving
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* symbols happens on the first call from the application. */
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/*
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* XXX - should we call _pam_init_handlers() here ? The following
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* is new as of Linux-PAM 0.55
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*/
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if ( _pam_init_handlers(*pamh) != PAM_SUCCESS ) {
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_pam_system_log(LOG_ERR, "pam_start: failed to initialize handlers");
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_pam_drop_env(*pamh); /* purge the environment */
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_pam_drop((*pamh)->service_name);
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_pam_drop((*pamh)->user);
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_pam_drop(*pamh);
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return PAM_ABORT;
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}
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D(("exiting pam_start successfully"));
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return PAM_SUCCESS;
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}
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