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19261079b7
Some notable changes, from upstream's release notes: - sshd(8): Remove support for obsolete "host/port" syntax. - ssh(1): When prompting whether to record a new host key, accept the key fingerprint as a synonym for "yes". - ssh-keygen(1): when acting as a CA and signing certificates with an RSA key, default to using the rsa-sha2-512 signature algorithm. - ssh(1), sshd(8), ssh-keygen(1): this release removes the "ssh-rsa" (RSA/SHA1) algorithm from those accepted for certificate signatures. - ssh-sk-helper(8): this is a new binary. It is used by the FIDO/U2F support to provide address-space isolation for token middleware libraries (including the internal one). - ssh(1): this release enables UpdateHostkeys by default subject to some conservative preconditions. - scp(1): this release changes the behaviour of remote to remote copies (e.g. "scp host-a:/path host-b:") to transfer through the local host by default. - scp(1): experimental support for transfers using the SFTP protocol as a replacement for the venerable SCP/RCP protocol that it has traditionally used. Additional integration work is needed to support FIDO/U2F in the base system. Deprecation Notice ------------------ OpenSSH will disable the ssh-rsa signature scheme by default in the next release. Reviewed by: imp MFC after: 1 month Relnotes: Yes Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D29985
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/* $OpenBSD: msg.c,v 1.20 2020/10/18 11:32:01 djm Exp $ */
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/*
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* Copyright (c) 2002 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/uio.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include "sshbuf.h"
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#include "ssherr.h"
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#include "log.h"
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#include "atomicio.h"
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#include "msg.h"
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#include "misc.h"
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int
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ssh_msg_send(int fd, u_char type, struct sshbuf *m)
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{
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u_char buf[5];
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u_int mlen = sshbuf_len(m);
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debug3_f("type %u", (unsigned int)type & 0xff);
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put_u32(buf, mlen + 1);
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buf[4] = type; /* 1st byte of payload is mesg-type */
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if (atomicio(vwrite, fd, buf, sizeof(buf)) != sizeof(buf)) {
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error_f("write: %s", strerror(errno));
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return (-1);
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}
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if (atomicio(vwrite, fd, sshbuf_mutable_ptr(m), mlen) != mlen) {
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error_f("write: %s", strerror(errno));
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return (-1);
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}
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return (0);
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}
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int
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ssh_msg_recv(int fd, struct sshbuf *m)
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{
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u_char buf[4], *p;
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u_int msg_len;
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int r;
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debug3("ssh_msg_recv entering");
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if (atomicio(read, fd, buf, sizeof(buf)) != sizeof(buf)) {
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if (errno != EPIPE)
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error_f("read header: %s", strerror(errno));
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return (-1);
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}
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msg_len = get_u32(buf);
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if (msg_len > sshbuf_max_size(m)) {
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error_f("read: bad msg_len %u", msg_len);
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return (-1);
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}
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sshbuf_reset(m);
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if ((r = sshbuf_reserve(m, msg_len, &p)) != 0) {
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error_fr(r, "reserve");
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return -1;
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}
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if (atomicio(read, fd, p, msg_len) != msg_len) {
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error_f("read: %s", strerror(errno));
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return (-1);
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}
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return (0);
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}
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