Initial revision

1 files changed, 112 insertions, 0 deletions

diff --git a/libpam/pam_start.c b/libpam/pam_start.c
new file mode 100644
index 00000000..fb222d62
--- /dev/null
+++ 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;
+}