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-rw-r--r--libpam/pam_start.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/libpam/pam_start.c b/libpam/pam_start.c
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+++ b/libpam/pam_start.c
@@ -0,0 +1,112 @@
+/* pam_start.c */
+
+/* Creator Marc Ewing
+ * Maintained by AGM
+ *
+ * $Id$
+ *
+ */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <syslog.h>
+
+#include "pam_private.h"
+
+int pam_start (
+ const char *service_name,
+ const char *user,
+ const struct pam_conv *pam_conversation,
+ pam_handle_t **pamh)
+{
+ D(("called pam_start: [%s] [%s] [%p] [%p]"
+ ,service_name, user, pam_conversation, pamh));
+
+ if ((*pamh = calloc(1, sizeof(**pamh))) == NULL) {
+ _pam_system_log(LOG_CRIT, "pam_start: calloc failed for *pamh");
+ return (PAM_BUF_ERR);
+ }
+
+ if (service_name) {
+ char *tmp;
+
+ if (((*pamh)->service_name = _pam_strdup(service_name)) == NULL) {
+ _pam_system_log(LOG_CRIT,
+ "pam_start: _pam_strdup failed for service name");
+ _pam_drop(*pamh);
+ return (PAM_BUF_ERR);
+ }
+ for (tmp=(*pamh)->service_name; *tmp; ++tmp)
+ *tmp = tolower(*tmp); /* require lower case */
+ } else
+ (*pamh)->service_name = NULL;
+
+ if (user) {
+ if (((*pamh)->user = _pam_strdup(user)) == NULL) {
+ _pam_system_log(LOG_CRIT,
+ "pam_start: _pam_strdup failed for user");
+ _pam_drop((*pamh)->service_name);
+ _pam_drop(*pamh);
+ return (PAM_BUF_ERR);
+ }
+ } else
+ (*pamh)->user = NULL;
+
+ (*pamh)->tty = NULL;
+ (*pamh)->prompt = NULL; /* prompt for pam_get_user() */
+ (*pamh)->ruser = NULL;
+ (*pamh)->rhost = NULL;
+ (*pamh)->authtok = NULL;
+ (*pamh)->oldauthtok = NULL;
+ (*pamh)->fail_delay.delay_fn_ptr = NULL;
+ (*pamh)->former.choice = PAM_NOT_STACKED;
+
+ if (pam_conversation == NULL
+ || ((*pamh)->pam_conversation = (struct pam_conv *)
+ malloc(sizeof(struct pam_conv))) == NULL) {
+ _pam_system_log(LOG_CRIT, "pam_start: malloc failed for pam_conv");
+ _pam_drop((*pamh)->service_name);
+ _pam_drop((*pamh)->user);
+ _pam_drop(*pamh);
+ return (PAM_BUF_ERR);
+ } else {
+ memcpy((*pamh)->pam_conversation, pam_conversation,
+ sizeof(struct pam_conv));
+ }
+
+ (*pamh)->data = NULL;
+ if ( _pam_make_env(*pamh) != PAM_SUCCESS ) {
+ _pam_system_log(LOG_ERR,"pam_start: failed to initialize environment");
+ _pam_drop((*pamh)->service_name);
+ _pam_drop((*pamh)->user);
+ _pam_drop(*pamh);
+ return PAM_ABORT;
+ }
+
+ _pam_reset_timer(*pamh); /* initialize timer support */
+
+ _pam_start_handlers(*pamh); /* cannot fail */
+
+ /* According to the SunOS man pages, loading modules and resolving
+ * symbols happens on the first call from the application. */
+
+ /*
+ * XXX - should we call _pam_init_handlers() here ? The following
+ * is new as of Linux-PAM 0.55
+ */
+
+ if ( _pam_init_handlers(*pamh) != PAM_SUCCESS ) {
+ _pam_system_log(LOG_ERR, "pam_start: failed to initialize handlers");
+ _pam_drop_env(*pamh); /* purge the environment */
+ _pam_drop((*pamh)->service_name);
+ _pam_drop((*pamh)->user);
+ _pam_drop(*pamh);
+ return PAM_ABORT;
+ }
+
+ D(("exiting pam_start successfully"));
+
+ return PAM_SUCCESS;
+}