1 files changed, 111 insertions, 0 deletions

diff --git a/auth2-none.c b/auth2-none.c
new file mode 100644
index 000000000..30337fd6d
--- /dev/null
+++ b/auth2-none.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2000 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: auth2-none.c,v 1.2 2002/05/31 11:35:15 markus Exp $");
+
+#include "auth.h"
+#include "xmalloc.h"
+#include "packet.h"
+#include "log.h"
+#include "servconf.h"
+#include "atomicio.h"
+#include "compat.h"
+#include "ssh2.h"
+#include "monitor_wrap.h"
+
+/* import */
+extern ServerOptions options;
+
+/* "none" is allowed only one time */
+static int none_enabled = 1;
+
+char *
+auth2_read_banner(void)
+{
+        struct stat st;
+        char *banner = NULL;
+        off_t len, n;
+        int fd;
+
+        if ((fd = open(options.banner, O_RDONLY)) == -1)
+                return (NULL);
+        if (fstat(fd, &st) == -1) {
+                close(fd);
+                return (NULL);
+        }
+        len = st.st_size;
+        banner = xmalloc(len + 1);
+        n = atomicio(read, fd, banner, len);
+        close(fd);
+
+        if (n != len) {
+                free(banner);
+                return (NULL);
+        }
+        banner[n] = '\0';
+        
+        return (banner);
+}
+
+static void
+userauth_banner(void)
+{
+        char *banner = NULL;
+
+        if (options.banner == NULL || (datafellows & SSH_BUG_BANNER))
+                return;
+
+        if ((banner = PRIVSEP(auth2_read_banner())) == NULL)
+                goto done;
+
+        packet_start(SSH2_MSG_USERAUTH_BANNER);
+        packet_put_cstring(banner);
+        packet_put_cstring("");         /* language, unused */
+        packet_send();
+        debug("userauth_banner: sent");
+done:
+        if (banner)
+                xfree(banner);
+        return;
+}
+
+static int
+userauth_none(Authctxt *authctxt)
+{
+        none_enabled = 0;
+        packet_check_eom();
+        userauth_banner();
+#ifdef HAVE_CYGWIN
+        if (check_nt_auth(1, authctxt->pw) == 0)
+                return(0);
+#endif
+        return (authctxt->valid ? PRIVSEP(auth_password(authctxt, "")) : 0);
+}
+
+Authmethod method_none = {
+        "none",
+        userauth_none,
+        &none_enabled
+};