+/* $OpenBSD: auth-chall.c,v 1.12 2006/08/03 03:34:41 deraadt Exp $ */
/*
- * Copyright (c) 2001 Markus Friedl. All rights reserved.
+ * Copyright (c) 2001 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
*/
#include "includes.h"
-RCSID("$OpenBSD: auth-chall.c,v 1.3 2001/01/21 19:05:41 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 "servconf.h"
-#ifdef SKEY
-#include <skey.h>
+/* limited protocol v1 interface to kbd-interactive authentication */
+
+extern KbdintDevice *devices[];
+static KbdintDevice *device;
+extern ServerOptions options;
char *
-get_challenge(Authctxt *authctxt, char *devs)
+get_challenge(Authctxt *authctxt)
{
- static char challenge[1024];
- struct skey skey;
- if (skeychallenge(&skey, authctxt->user, challenge) == -1)
+ char *challenge, *name, *info, **prompts;
+ 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;
+ if ((authctxt->kbdintctxt = device->init_ctx(authctxt)) == NULL)
+ return NULL;
+ if (device->query(authctxt->kbdintctxt, &name, &info,
+ &numprompts, &prompts, &echo_on)) {
+ device->free_ctx(authctxt->kbdintctxt);
+ authctxt->kbdintctxt = NULL;
return NULL;
- strlcat(challenge, "\nS/Key Password: ", sizeof challenge);
- return challenge;
+ }
+ if (numprompts < 1)
+ fatal("get_challenge: numprompts < 1");
+ challenge = xstrdup(prompts[0]);
+ for (i = 0; i < numprompts; i++)
+ xfree(prompts[i]);
+ xfree(prompts);
+ xfree(name);
+ xfree(echo_on);
+ xfree(info);
+
+ return (challenge);
}
int
-verify_response(Authctxt *authctxt, char *response)
-{
- return (authctxt->valid &&
- skey_haskey(authctxt->pw->pw_name) == 0 &&
- skey_passcheck(authctxt->pw->pw_name, response) != -1);
-}
-#else
-/* not available */
-char *
-get_challenge(Authctxt *authctxt, char *devs)
+verify_response(Authctxt *authctxt, const char *response)
{
- return NULL;
+ 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;
+ 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 authenticated;
}
-int
-verify_response(Authctxt *authctxt, char *response)
+void
+abandon_challenge_response(Authctxt *authctxt)
{
- return 0;
+ if (authctxt->kbdintctxt != NULL) {
+ device->free_ctx(authctxt->kbdintctxt);
+ authctxt->kbdintctxt = NULL;
+ }
}
-#endif