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0fdf8fae8b
Highlights from the release notes are reproduced below. Some security and bug fixes were previously merged into FreeBSD and have been elided. See the upstream release notes for full details (https://www.openssh.com/releasenotes.html). --- Future deprecation notice ========================= OpenSSH plans to remove support for the DSA signature algorithm in early 2025. Potentially-incompatible changes -------------------------------- * sshd(8): the server will now block client addresses that repeatedly fail authentication, repeatedly connect without ever completing authentication or that crash the server. See the discussion of PerSourcePenalties below for more information. Operators of servers that accept connections from many users, or servers that accept connections from addresses behind NAT or proxies may need to consider these settings. * sshd(8): the server has been split into a listener binary, sshd(8), and a per-session binary "sshd-session". This allows for a much smaller listener binary, as it no longer needs to support the SSH protocol. As part of this work, support for disabling privilege separation (which previously required code changes to disable) and disabling re-execution of sshd(8) has been removed. Further separation of sshd-session into additional, minimal binaries is planned for the future. * sshd(8): several log messages have changed. In particular, some log messages will be tagged with as originating from a process named "sshd-session" rather than "sshd". * ssh-keyscan(1): this tool previously emitted comment lines containing the hostname and SSH protocol banner to standard error. This release now emits them to standard output, but adds a new "-q" flag to silence them altogether. * sshd(8): (portable OpenSSH only) sshd will no longer use argv[0] as the PAM service name. A new "PAMServiceName" sshd_config(5) directive allows selecting the service name at runtime. This defaults to "sshd". bz2101 New features ------------ * sshd(8): sshd(8) will now penalise client addresses that, for various reasons, do not successfully complete authentication. This feature is controlled by a new sshd_config(5) PerSourcePenalties option and is on by default. * ssh(8): allow the HostkeyAlgorithms directive to disable the implicit fallback from certificate host key to plain host keys. Portability ----------- * sshd(8): expose SSH_AUTH_INFO_0 always to PAM auth modules unconditionally. The previous behaviour was to expose it only when particular authentication methods were in use. * ssh(1), ssh-agent(8): allow the presence of the WAYLAND_DISPLAY environment variable to enable SSH_ASKPASS, similarly to the X11 DISPLAY environment variable. GHPR479 --- Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D48914
83 lines
3.7 KiB
C
83 lines
3.7 KiB
C
/* $OpenBSD: clientloop.h,v 1.38 2024/05/17 06:42:04 jsg Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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*
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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*/
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/*
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* Copyright (c) 2001 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 <termios.h>
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struct ssh;
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/* Client side main loop for the interactive session. */
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int client_loop(struct ssh *, int, int, int);
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int client_x11_get_proto(struct ssh *, const char *, const char *,
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u_int, u_int, char **, char **);
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void client_session2_setup(struct ssh *, int, int, int,
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const char *, struct termios *, int, struct sshbuf *, char **);
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char *client_request_tun_fwd(struct ssh *, int, int, int,
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channel_open_fn *, void *);
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void client_stop_mux(void);
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/* Escape filter for protocol 2 sessions */
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void *client_new_escape_filter_ctx(int);
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void client_filter_cleanup(struct ssh *, int, void *);
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int client_simple_escape_filter(struct ssh *, Channel *, char *, int);
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/* Global request confirmation callbacks */
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typedef void global_confirm_cb(struct ssh *, int, u_int32_t, void *);
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void client_register_global_confirm(global_confirm_cb *, void *);
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/* Channel request confirmation callbacks */
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enum confirm_action { CONFIRM_WARN = 0, CONFIRM_CLOSE, CONFIRM_TTY };
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void client_expect_confirm(struct ssh *, int, const char *,
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enum confirm_action);
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/* Multiplexing protocol version */
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#define SSHMUX_VER 4
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/* Multiplexing control protocol flags */
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#define SSHMUX_COMMAND_OPEN 1 /* Open new connection */
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#define SSHMUX_COMMAND_ALIVE_CHECK 2 /* Check master is alive */
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#define SSHMUX_COMMAND_TERMINATE 3 /* Ask master to exit */
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#define SSHMUX_COMMAND_STDIO_FWD 4 /* Open stdio fwd (ssh -W) */
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#define SSHMUX_COMMAND_FORWARD 5 /* Forward only, no command */
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#define SSHMUX_COMMAND_STOP 6 /* Disable mux but not conn */
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#define SSHMUX_COMMAND_CANCEL_FWD 7 /* Cancel forwarding(s) */
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#define SSHMUX_COMMAND_PROXY 8 /* Open new connection */
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void muxserver_listen(struct ssh *);
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int muxclient(const char *);
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void mux_exit_message(struct ssh *, Channel *, int);
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void mux_tty_alloc_failed(struct ssh *ssh, Channel *);
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