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git://anongit.mindrot.org/openssh.git
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b0fb6872ed
[atomicio.c auth-bsdauth.c auth-chall.c auth-krb5.c auth-options.c]
[auth-pam.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c]
[auth-shadow.c auth-skey.c auth.c auth1.c auth2-chall.c]
[auth2-hostbased.c auth2-kbdint.c auth2-none.c auth2-passwd.c]
[auth2-pubkey.c auth2.c authfd.c authfile.c bufaux.c buffer.c]
[canohost.c channels.c cipher-3des1.c cipher-acss.c cipher-aes.c]
[cipher-bf1.c cipher-ctr.c cipher.c cleanup.c clientloop.c compat.c]
[compress.c deattack.c dh.c dispatch.c dns.c entropy.c fatal.c]
[groupaccess.c hostfile.c includes.h kex.c kexdh.c kexdhc.c]
[kexdhs.c kexgex.c kexgexc.c kexgexs.c key.c log.c loginrec.c]
[loginrec.h logintest.c mac.c match.c md-sha256.c md5crypt.c misc.c]
[monitor.c monitor_fdpass.c monitor_mm.c monitor_wrap.c msg.c]
[nchan.c packet.c progressmeter.c readconf.c readpass.c rsa.c]
[scard.c scp.c servconf.c serverloop.c session.c sftp-client.c]
[sftp-common.c sftp-glob.c sftp-server.c sftp.c ssh-add.c]
[ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c ssh-keysign.c]
[ssh-rand-helper.c ssh-rsa.c ssh.c sshconnect.c sshconnect1.c]
[sshconnect2.c sshd.c sshlogin.c sshpty.c sshtty.c ttymodes.c]
[uidswap.c uuencode.c xmalloc.c openbsd-compat/bsd-arc4random.c]
[openbsd-compat/bsd-closefrom.c openbsd-compat/bsd-cygwin_util.c]
[openbsd-compat/bsd-getpeereid.c openbsd-compat/bsd-misc.c]
[openbsd-compat/bsd-nextstep.c openbsd-compat/bsd-snprintf.c]
[openbsd-compat/bsd-waitpid.c openbsd-compat/fake-rfc2553.c]
RCSID() can die
129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "auth.h"
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#include "xmalloc.h"
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#include "packet.h"
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#include "log.h"
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#include "servconf.h"
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#include "atomicio.h"
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#include "compat.h"
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#include "ssh2.h"
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#include "monitor_wrap.h"
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/* import */
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extern ServerOptions options;
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/* "none" is allowed only one time */
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static int none_enabled = 1;
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char *
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auth2_read_banner(void)
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{
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struct stat st;
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char *banner = NULL;
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size_t len, n;
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int fd;
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if ((fd = open(options.banner, O_RDONLY)) == -1)
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return (NULL);
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if (fstat(fd, &st) == -1) {
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close(fd);
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return (NULL);
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}
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if (st.st_size > 1*1024*1024) {
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close(fd);
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return (NULL);
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}
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len = (size_t)st.st_size; /* truncate */
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banner = xmalloc(len + 1);
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n = atomicio(read, fd, banner, len);
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close(fd);
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if (n != len) {
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xfree(banner);
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return (NULL);
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}
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banner[n] = '\0';
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return (banner);
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}
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void
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userauth_send_banner(const char *msg)
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{
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if (datafellows & SSH_BUG_BANNER)
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return;
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packet_start(SSH2_MSG_USERAUTH_BANNER);
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packet_put_cstring(msg);
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packet_put_cstring(""); /* language, unused */
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packet_send();
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debug("%s: sent", __func__);
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}
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static void
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userauth_banner(void)
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{
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char *banner = NULL;
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if (options.banner == NULL || (datafellows & SSH_BUG_BANNER))
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return;
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if ((banner = PRIVSEP(auth2_read_banner())) == NULL)
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goto done;
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userauth_send_banner(banner);
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done:
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if (banner)
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xfree(banner);
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}
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static int
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userauth_none(Authctxt *authctxt)
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{
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none_enabled = 0;
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packet_check_eom();
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userauth_banner();
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#ifdef HAVE_CYGWIN
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if (check_nt_auth(1, authctxt->pw) == 0)
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return (0);
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#endif
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if (options.password_authentication)
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return (PRIVSEP(auth_password(authctxt, "")));
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return (0);
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}
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Authmethod method_none = {
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"none",
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userauth_none,
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&none_enabled
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};
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