+/* $OpenBSD: auth-chall.c,v 1.12 2006/08/03 03:34:41 deraadt Exp $ */
/*
* Copyright (c) 2001 Markus Friedl. All rights reserved.
*
*/
#include "includes.h"
-RCSID("$OpenBSD: auth-chall.c,v 1.8 2001/05/18 14:13:28 markus Exp $");
+#include <sys/types.h>
+
+#include <stdarg.h>
+
+#include "xmalloc.h"
+#include "key.h"
+#include "hostfile.h"
#include "auth.h"
#include "log.h"
-#include "xmalloc.h"
+#include "servconf.h"
/* limited protocol v1 interface to kbd-interactive authentication */
extern KbdintDevice *devices[];
static KbdintDevice *device;
+extern ServerOptions options;
char *
get_challenge(Authctxt *authctxt)
u_int i, numprompts;
u_int *echo_on;
+#ifdef USE_PAM
+ if (!options.use_pam)
+ remove_kbdint_device("pam");
+#endif
+
device = devices[0]; /* we always use the 1st device for protocol 1 */
if (device == NULL)
return NULL;
int
verify_response(Authctxt *authctxt, const char *response)
{
- char *resp[1];
- int res;
+ char *resp[1], *name, *info, **prompts;
+ u_int i, numprompts, *echo_on;
+ int authenticated = 0;
if (device == NULL)
return 0;
if (authctxt->kbdintctxt == NULL)
return 0;
resp[0] = (char *)response;
- res = device->respond(authctxt->kbdintctxt, 1, resp);
+ switch (device->respond(authctxt->kbdintctxt, 1, resp)) {
+ case 0: /* Success */
+ authenticated = 1;
+ break;
+ case 1: /* Postponed - retry with empty query for PAM */
+ if ((device->query(authctxt->kbdintctxt, &name, &info,
+ &numprompts, &prompts, &echo_on)) != 0)
+ break;
+ if (numprompts == 0 &&
+ device->respond(authctxt->kbdintctxt, 0, resp) == 0)
+ authenticated = 1;
+
+ for (i = 0; i < numprompts; i++)
+ xfree(prompts[i]);
+ xfree(prompts);
+ xfree(name);
+ xfree(echo_on);
+ xfree(info);
+ break;
+ }
device->free_ctx(authctxt->kbdintctxt);
authctxt->kbdintctxt = NULL;
- return res ? 0 : 1;
+ return authenticated;
+}
+void
+abandon_challenge_response(Authctxt *authctxt)
+{
+ if (authctxt->kbdintctxt != NULL) {
+ device->free_ctx(authctxt->kbdintctxt);
+ authctxt->kbdintctxt = NULL;
+ }
}