Properly flatten openssh/dist.

1 files changed, 123 insertions, 0 deletions

diff --git a/auth-chall.c b/auth-chall.c
new file mode 100644
index 0000000..919b1ea
--- /dev/null
+++ b/auth-chall.c
@@ -0,0 +1,123 @@
+/* $OpenBSD: auth-chall.c,v 1.12 2006/08/03 03:34:41 deraadt Exp $ */
+/*
+ * 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"
+
+#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"
+
+/* limited protocol v1 interface to kbd-interactive authentication */
+
+extern KbdintDevice *devices[];
+static KbdintDevice *device;
+extern ServerOptions options;
+
+char *
+get_challenge(Authctxt *authctxt)
+{
+	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;
+	}
+	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], *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;
+}
+void
+abandon_challenge_response(Authctxt *authctxt)
+{
+	if (authctxt->kbdintctxt != NULL) {
+		device->free_ctx(authctxt->kbdintctxt);
+		authctxt->kbdintctxt = NULL;
+	}
+}