Initial revision

[gssapi-openssh.git] / openssh / auth-chall.c

diff --git a/openssh/auth-chall.c b/openssh/auth-chall.c
new file mode 100644 (file)
index 0000000..45e0c34
--- /dev/null
+++ b/openssh/auth-chall.c
@@ -0,0 +1,82 @@
+/*
+ * 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
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "includes.h"
+RCSID("$OpenBSD: auth-chall.c,v 1.8 2001/05/18 14:13:28 markus Exp $");
+
+#include "auth.h"
+#include "log.h"
+#include "xmalloc.h"
+
+/* limited protocol v1 interface to kbd-interactive authentication */
+
+extern KbdintDevice *devices[];
+static KbdintDevice *device;
+
+char *
+get_challenge(Authctxt *authctxt)
+{
+       char *challenge, *name, *info, **prompts;
+       u_int i, numprompts;
+       u_int *echo_on;
+
+       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;
+       }
+       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, const char *response)
+{
+       char *resp[1];
+       int res;
+
+       if (device == NULL)
+               return 0;
+       if (authctxt->kbdintctxt == NULL)
+               return 0;
+       resp[0] = (char *)response;
+       res = device->respond(authctxt->kbdintctxt, 1, resp);
+       device->free_ctx(authctxt->kbdintctxt);
+       authctxt->kbdintctxt = NULL;
+       return res ? 0 : 1;
+}