109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/* $NetBSD: auth2-none.c,v 1.4 2003/07/10 01:09:42 lukem Exp $ */
|
|
/*
|
|
* 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 1.4 2002/06/27 10:35:47 deraadt Exp $");
|
|
__RCSID("$NetBSD: auth2-none.c,v 1.4 2003/07/10 01:09:42 lukem 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 = atomic_read(fd, banner, len);
|
|
close(fd);
|
|
|
|
if (n != len) {
|
|
xfree(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);
|
|
}
|
|
|
|
static int
|
|
userauth_none(Authctxt *authctxt)
|
|
{
|
|
none_enabled = 0;
|
|
packet_check_eom();
|
|
userauth_banner();
|
|
return (authctxt->valid ? PRIVSEP(auth_password(authctxt, "")) : 0);
|
|
}
|
|
|
|
Authmethod method_none = {
|
|
"none",
|
|
userauth_none,
|
|
&none_enabled
|
|
};
|