构建基于RHEL7(CentOS7)的OpenSSH9.5p1的RPM包和升级回退方案

本文适用：RHEL7系列，或同类系统(CentOS7等)
文档形成时期：2023年
因软件世界之复杂和个人能力之限，难免疏漏和错误，欢迎指正。

环境准备

yum install rpmdevtools
#创建目录
rpmdev-setuptree
#或手动创建目录：

mkdir rpmbuild-openssh9.5p1; cd rpmbuild-openssh9.5p1
mkdir -p ./{BUILD,RPMS,SOURCES,SPECS,SRPMS}

安装依赖

yum install rpm-build gcc make wget openssl-devel krb5-devel pam-devel libX11-devel xmkmf libXt-devel

准备包
libressl-3.8.2.tar.gz openssh-9.5p1.tar.gz openssl-1.1.1w openssl-1.1.1w.tar.gz x11-ssh-askpass-1.2.4.1.tar.gz zlib-1.3.tar.gz
其中openssl-1.1.1w是同系统中编译好的，也就是说，先把openssl-1.1.1w编译安装，安装目标路径是/usr/local/openssl-1.1.1w，然后拷贝到SOURCES目录中，
所有包放SOURCES目录中，其中tar.gz包在spec中也可以指定地址下载，比如x11-ssh-askpass-1.2.4.1.tar.gz我就是下载的。
SOURCES/openssl-1.1.1w.tar.gz没用到，直接用编译好的。

准备spec文件
tar zxf openssh-9.5p1.tar.gz openssh-9.5p1/contrib/redhat/openssh.spec
放SPECS目录下
chown sshd:sshd SPECS/openssh.spec
修改openssh.spec之后如下：
no_gnome_askpass 0改为1
no_x11_askpass 0改为1
注释掉这一行：BuildRequires: openssl-devel < 1.1 大约在103或113行

文件目录树：

openssh-9.5p1-el7.spec内容

%global ver 9.5p1
%global rel custom%{?dist}

# OpenSSH privilege separation requires a user & group ID
%global sshd_uid    74
%global sshd_gid    74

# Version of ssh-askpass
%global aversion 1.2.4.1

# Do we want to disable building of x11-askpass? (1=yes 0=no)
%global no_x11_askpass 1

# Do we want to disable building of gnome-askpass? (1=yes 0=no)
%global no_gnome_askpass 1

# Do we want to link against a static libcrypto? (1=yes 0=no)
%global static_libcrypto 0

# Do we want smartcard support (1=yes 0=no)
%global scard 0

# Use GTK2 instead of GNOME in gnome-ssh-askpass
%global gtk2 1

# Use build6x options for older RHEL builds
# RHEL 7 not yet supported
%if 0%{?rhel} > 6
%global build6x 0
%else
%global build6x 1
%endif

%if 0%{?fedora} >= 26
%global compat_openssl 1
%else
%global compat_openssl 0
%endif

# Do we want kerberos5 support (1=yes 0=no)
%global kerberos5 1

# Reserve options to override askpass settings with:
# rpm -ba|--rebuild --define 'skip_xxx 1'
%{?skip_x11_askpass:%global no_x11_askpass 1}
%{?skip_gnome_askpass:%global no_gnome_askpass 1}

# Add option to build without GTK2 for older platforms with only GTK+.
# RedHat <= 7.2 and Red Hat Advanced Server 2.1 are examples.
# rpm -ba|--rebuild --define 'no_gtk2 1'
%{?no_gtk2:%global gtk2 0}

# Is this a build for RHL 6.x or earlier?
%{?build_6x:%global build6x 1}

# If this is RHL 6.x, the default configuration has sysconfdir in /usr/etc.
%if %{build6x}
%global _sysconfdir /etc
%endif

# Options for static OpenSSL link:
# rpm -ba|--rebuild --define "static_openssl 1"
%{?static_openssl:%global static_libcrypto 1}

# Options for Smartcard support: (needs libsectok and openssl-engine)
# rpm -ba|--rebuild --define "smartcard 1"
%{?smartcard:%global scard 1}

# Is this a build for the rescue CD (without PAM)? (1=yes 0=no)
%global rescue 0
%{?build_rescue:%global rescue 1}

# Turn off some stuff for resuce builds
%if %{rescue}
%global kerberos5 0
%endif

Summary: The OpenSSH implementation of SSH protocol version 2.
Name: openssh
Version: %{ver}
%if %{rescue}
Release: %{rel}rescue
%else
Release: %{rel}
%endif
URL: https://www.openssh.com/portable.html
Source0: https://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-%{version}.tar.gz
Source1: http://www.jmknoble.net/software/x11-ssh-askpass/x11-ssh-askpass-%{aversion}.tar.gz
License: BSD
Group: Applications/Internet
BuildRoot: %{_tmppath}/%{name}-%{version}-buildroot
Obsoletes: ssh
%if %{build6x}
PreReq: initscripts >= 5.00
%else
Requires: initscripts >= 5.20
%endif
BuildRequires: perl
%if %{compat_openssl}
BuildRequires: compat-openssl10-devel
%else
BuildRequires: openssl-devel >= 1.0.1
#BuildRequires: openssl-devel < 1.1
%endif
BuildRequires: /bin/login
%if ! %{build6x}
BuildRequires: glibc-devel, pam
%else
BuildRequires: /usr/include/security/pam_appl.h
%endif
%if ! %{no_x11_askpass}
BuildRequires: /usr/include/X11/Xlib.h
# Xt development tools
BuildRequires: libXt-devel
# Provides xmkmf
BuildRequires: imake
# Rely on relatively recent gtk
BuildRequires: gtk2-devel
%endif
%if ! %{no_gnome_askpass}
BuildRequires: pkgconfig
%endif
%if %{kerberos5}
BuildRequires: krb5-devel
BuildRequires: krb5-libs
%endif

%package clients
Summary: OpenSSH clients.
Requires: openssh = %{version}-%{release}
Group: Applications/Internet
Obsoletes: ssh-clients

%package server
Summary: The OpenSSH server daemon.
Group: System Environment/Daemons
Obsoletes: ssh-server
Requires: openssh = %{version}-%{release}, chkconfig >= 0.9
%if ! %{build6x}
Requires: /etc/pam.d/system-auth
%endif

%package askpass
Summary: A passphrase dialog for OpenSSH and X.
Group: Applications/Internet
Requires: openssh = %{version}-%{release}
Obsoletes: ssh-extras

%package askpass-gnome
Summary: A passphrase dialog for OpenSSH, X, and GNOME.
Group: Applications/Internet
Requires: openssh = %{version}-%{release}
Obsoletes: ssh-extras

%description
SSH (Secure SHell) is a program for logging into and executing
commands on a remote machine. SSH is intended to replace rlogin and
rsh, and to provide secure encrypted communications between two
untrusted hosts over an insecure network. X11 connections and
arbitrary TCP/IP ports can also be forwarded over the secure channel.

OpenSSH is OpenBSD's version of the last free version of SSH, bringing
it up to date in terms of security and features, as well as removing
all patented algorithms to separate libraries.

This package includes the core files necessary for both the OpenSSH
client and server. To make this package useful, you should also
install openssh-clients, openssh-server, or both.

%description clients
OpenSSH is a free version of SSH (Secure SHell), a program for logging
into and executing commands on a remote machine. This package includes
the clients necessary to make encrypted connections to SSH servers.
You'll also need to install the openssh package on OpenSSH clients.

%description server
OpenSSH is a free version of SSH (Secure SHell), a program for logging
into and executing commands on a remote machine. This package contains
the secure shell daemon (sshd). The sshd daemon allows SSH clients to
securely connect to your SSH server. You also need to have the openssh
package installed.

%description askpass
OpenSSH is a free version of SSH (Secure SHell), a program for logging
into and executing commands on a remote machine. This package contains
an X11 passphrase dialog for OpenSSH.

%description askpass-gnome
OpenSSH is a free version of SSH (Secure SHell), a program for logging
into and executing commands on a remote machine. This package contains
an X11 passphrase dialog for OpenSSH and the GNOME GUI desktop
environment.

%prep

%if ! %{no_x11_askpass}
%setup -q -a 1
%else
%setup -q
%endif



%build
%if %{rescue}
CFLAGS="$RPM_OPT_FLAGS -Os"; export CFLAGS
%endif

%configure \
        --sysconfdir=%{_sysconfdir}/ssh \
        --libexecdir=%{_libexecdir}/openssh \
        --datadir=%{_datadir}/openssh \
        --with-default-path=/usr/local/bin:/bin:/usr/bin \
        --with-superuser-path=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin \
        --with-privsep-path=%{_var}/empty/sshd \
        --with-openssl-includes=/usr/local/openssl-1.1.1w/include \
        --with-ssl-dir=/usr/local/openssl-1.1.1w \
        --mandir=%{_mandir} \
        --with-mantype=man \
        --disable-strip \
%if %{scard}
        --with-smartcard \
%endif
%if %{rescue}
        --without-pam \
%else
        --with-pam \
%endif
%if %{kerberos5}
         --with-kerberos5=$K5DIR \
%endif


%if %{static_libcrypto}
perl -pi -e "s|-lcrypto|%{_libdir}/libcrypto.a|g" Makefile
%endif

make

%if ! %{no_x11_askpass}
pushd x11-ssh-askpass-%{aversion}
%configure --libexecdir=%{_libexecdir}/openssh
xmkmf -a
make
popd
%endif

# Define a variable to toggle gnome1/gtk2 building.  This is necessary
# because RPM doesn't handle nested %if statements.
%if %{gtk2}
        gtk2=yes
%else
        gtk2=no
%endif

%if ! %{no_gnome_askpass}
pushd contrib
if [ $gtk2 = yes ] ; then
        make gnome-ssh-askpass2
        mv gnome-ssh-askpass2 gnome-ssh-askpass
else
        make gnome-ssh-askpass1
        mv gnome-ssh-askpass1 gnome-ssh-askpass
fi
popd
%endif

%install
rm -rf $RPM_BUILD_ROOT

mkdir -p -m755 "%{buildroot}/usr/local"
cp -rf %_sourcedir/openssl-1.1.1w "%{buildroot}/usr/local/"

mkdir -p -m755 $RPM_BUILD_ROOT%{_sysconfdir}/ssh
mkdir -p -m755 $RPM_BUILD_ROOT%{_libexecdir}/openssh
mkdir -p -m755 $RPM_BUILD_ROOT%{_var}/empty/sshd

make install DESTDIR=$RPM_BUILD_ROOT

install -d $RPM_BUILD_ROOT/etc/pam.d/
install -d $RPM_BUILD_ROOT/etc/rc.d/init.d
install -d $RPM_BUILD_ROOT%{_libexecdir}/openssh
%if %{build6x}
install -m644 contrib/redhat/sshd.pam.old $RPM_BUILD_ROOT/etc/pam.d/sshd
%else
install -m644 contrib/redhat/sshd.pam     $RPM_BUILD_ROOT/etc/pam.d/sshd
%endif
install -m755 contrib/redhat/sshd.init $RPM_BUILD_ROOT/etc/rc.d/init.d/sshd

%if ! %{no_x11_askpass}
install x11-ssh-askpass-%{aversion}/x11-ssh-askpass $RPM_BUILD_ROOT%{_libexecdir}/openssh/x11-ssh-askpass
ln -s x11-ssh-askpass $RPM_BUILD_ROOT%{_libexecdir}/openssh/ssh-askpass
%endif

%if ! %{no_gnome_askpass}
install contrib/gnome-ssh-askpass $RPM_BUILD_ROOT%{_libexecdir}/openssh/gnome-ssh-askpass
%endif

%if ! %{scard}
         rm -f $RPM_BUILD_ROOT/usr/share/openssh/Ssh.bin
%endif

%if ! %{no_gnome_askpass}
install -m 755 -d $RPM_BUILD_ROOT%{_sysconfdir}/profile.d/
install -m 755 contrib/redhat/gnome-ssh-askpass.csh $RPM_BUILD_ROOT%{_sysconfdir}/profile.d/
install -m 755 contrib/redhat/gnome-ssh-askpass.sh $RPM_BUILD_ROOT%{_sysconfdir}/profile.d/
%endif

perl -pi -e "s|$RPM_BUILD_ROOT||g" $RPM_BUILD_ROOT%{_mandir}/man*/*

%clean
rm -rf $RPM_BUILD_ROOT

%triggerun server -- ssh-server
if [ "$1" != 0 -a -r /var/run/sshd.pid ] ; then
        touch /var/run/sshd.restart
fi

%triggerun server -- openssh-server < 2.5.0p1
# Count the number of HostKey and HostDsaKey statements we have.
gawk    'BEGIN {IGNORECASE=1}
         /^hostkey/ || /^hostdsakey/ {sawhostkey = sawhostkey + 1}
         END {exit sawhostkey}' /etc/ssh/sshd_config
# And if we only found one, we know the client was relying on the old default
# behavior, which loaded the the SSH2 DSA host key when HostDsaKey wasn't
# specified.  Now that HostKey is used for both SSH1 and SSH2 keys, specifying
# one nullifies the default, which would have loaded both.
if [ $? -eq 1 ] ; then
        echo HostKey /etc/ssh/ssh_host_rsa_key >> /etc/ssh/sshd_config
        echo HostKey /etc/ssh/ssh_host_dsa_key >> /etc/ssh/sshd_config
fi

%triggerpostun server -- ssh-server
if [ "$1" != 0 ] ; then
        /sbin/chkconfig --add sshd
        if test -f /var/run/sshd.restart ; then
                rm -f /var/run/sshd.restart
                /sbin/service sshd start > /dev/null 2>&1 || :
        fi
fi

%pre server
%{_sbindir}/groupadd -r -g %{sshd_gid} sshd 2>/dev/null || :
%{_sbindir}/useradd -d /var/empty/sshd -s /bin/false -u %{sshd_uid} \
        -g sshd -M -r sshd 2>/dev/null || :

export datetime=$(date +%Y%m%d-%H%M)
mv /usr/bin/openssl /usr/bin/openssl.bak-${datetime} &>> /dev/null
mv /usr/include/openssl /usr/include/openssl.bak-${datetime} &>> /dev/null #20231103实际发现这个目录不存在

/bin/cp -ap /etc/ssh /etc/ssh.bak-${datetime}
mkdir /usr/bin/bak-${datetime}
/bin/cp -ap /usr/bin/{scp,sftp,ssh,ssh-add,ssh-agent,ssh-keygen,ssh-keyscan} /usr/bin/bak-${datetime}/
/bin/cp -ap /usr/sbin/sshd /usr/sbin/sshd.bak-${datetime}
/bin/cp -ap /etc/sysconfig/sshd /etc/sysconfig/sshd.bak-${datetime}
/bin/cp -ap /etc/pam.d/sshd /etc/pam.d/sshd.bak-${datetime}
/bin/cp -ap /etc/pam.d/sshd /etc/pam.d/sshd.bak


%post server
/sbin/chkconfig --add sshd

sed -i '1a/usr/local/openssl-1.1.1w/lib' /etc/ld.so.conf
ldconfig
chmod 600 /etc/ssh/ssh_host_ed25519_key
chmod 600 /etc/ssh/ssh_host_ecdsa_key
chmod 600 /etc/ssh/ssh_host_rsa_key
/bin/cp -ap /etc/pam.d/sshd.bak /etc/pam.d/sshd
#sed -i "/UseDNS/c\UseDNS no" /etc/ssh/sshd_config
#sed -i "/GSSAPIAuthentication/c\GSSAPIAuthentication no" /etc/ssh/sshd_config  # 解决启动时卡住
systemctl enable sshd
/sbin/service sshd restart

%postun server
/sbin/service sshd condrestart > /dev/null 2>&1 || :

%preun server
if [ "$1" = 0 ]
then
        /sbin/service sshd stop > /dev/null 2>&1 || :
        /sbin/chkconfig --del sshd
fi

%files
%defattr(-,root,root)
%doc CREDITS ChangeLog INSTALL LICENCE OVERVIEW README* PROTOCOL* TODO
%attr(0755,root,root) %{_bindir}/scp
%attr(0644,root,root) %{_mandir}/man1/scp.1*
%attr(0755,root,root) %dir %{_sysconfdir}/ssh
%attr(0600,root,root) %config(noreplace) %{_sysconfdir}/ssh/moduli
%if ! %{rescue}
%attr(0755,root,root) %{_bindir}/ssh-keygen
%attr(0644,root,root) %{_mandir}/man1/ssh-keygen.1*
%attr(0755,root,root) %dir %{_libexecdir}/openssh
%attr(4711,root,root) %{_libexecdir}/openssh/ssh-keysign
%attr(0755,root,root) %{_libexecdir}/openssh/ssh-pkcs11-helper
%attr(0755,root,root) %{_libexecdir}/openssh/ssh-sk-helper
%attr(0644,root,root) %{_mandir}/man8/ssh-keysign.8*
%attr(0644,root,root) %{_mandir}/man8/ssh-pkcs11-helper.8*
%attr(0644,root,root) %{_mandir}/man8/ssh-sk-helper.8*
%endif
%if %{scard}
%attr(0755,root,root) %dir %{_datadir}/openssh
%attr(0644,root,root) %{_datadir}/openssh/Ssh.bin
%endif
/usr/local/openssl-1.1.1w


%files clients
%defattr(-,root,root)
%attr(0755,root,root) %{_bindir}/ssh
%attr(0644,root,root) %{_mandir}/man1/ssh.1*
%attr(0644,root,root) %{_mandir}/man5/ssh_config.5*
%attr(0644,root,root) %config(noreplace) %{_sysconfdir}/ssh/ssh_config
%if ! %{rescue}
%attr(2755,root,nobody) %{_bindir}/ssh-agent
%attr(0755,root,root) %{_bindir}/ssh-add
%attr(0755,root,root) %{_bindir}/ssh-keyscan
%attr(0755,root,root) %{_bindir}/sftp
%attr(0644,root,root) %{_mandir}/man1/ssh-agent.1*
%attr(0644,root,root) %{_mandir}/man1/ssh-add.1*
%attr(0644,root,root) %{_mandir}/man1/ssh-keyscan.1*
%attr(0644,root,root) %{_mandir}/man1/sftp.1*
%endif

%if ! %{rescue}
%files server
%defattr(-,root,root)
%dir %attr(0111,root,root) %{_var}/empty/sshd
%attr(0755,root,root) %{_sbindir}/sshd
%attr(0755,root,root) %{_libexecdir}/openssh/sftp-server
%attr(0644,root,root) %{_mandir}/man8/sshd.8*
%attr(0644,root,root) %{_mandir}/man5/moduli.5*
%attr(0644,root,root) %{_mandir}/man5/sshd_config.5*
%attr(0644,root,root) %{_mandir}/man8/sftp-server.8*
%attr(0755,root,root) %dir %{_sysconfdir}/ssh
%attr(0600,root,root) %config(noreplace) %{_sysconfdir}/ssh/sshd_config
%attr(0600,root,root) %config(noreplace) /etc/pam.d/sshd
%attr(0755,root,root) %config /etc/rc.d/init.d/sshd
%endif

%if ! %{no_x11_askpass}
%files askpass
%defattr(-,root,root)
%doc x11-ssh-askpass-%{aversion}/README
%doc x11-ssh-askpass-%{aversion}/ChangeLog
%doc x11-ssh-askpass-%{aversion}/SshAskpass*.ad
%{_libexecdir}/openssh/ssh-askpass
%attr(0755,root,root) %{_libexecdir}/openssh/x11-ssh-askpass
%endif

%if ! %{no_gnome_askpass}
%files askpass-gnome
%defattr(-,root,root)
%attr(0755,root,root) %config %{_sysconfdir}/profile.d/gnome-ssh-askpass.*
%attr(0755,root,root) %{_libexecdir}/openssh/gnome-ssh-askpass
%endif

%changelog
* Mon Dec 04 2023 N
- Upgrade OpenSSH for CentOS7

* Thu Oct 28 2021 Damien Miller 
- Remove remaining traces of --with-md5-passwords

* Thu Oct 28 2021 Damien Miller 
- Remove remaining traces of --with-md5-passwords

* Mon Jul 20 2020 Damien Miller 
- Add ssh-sk-helper and corresponding manual page.

* Sat Feb 10 2018 Darren Tucker 
- Update openssl-devel dependency to match current requirements.
- Handle Fedora >=6 openssl 1.0 compat libs.
- Remove SSH1 from description.
- Don't strip binaries at build time so that debuginfo package can be
  created.

* Sun Nov 16 2014 Nico Kadel-Garcia 
- Add '--mandir' and '--with-mantype' for RHEL 5 compatibility
- Add 'dist' option to 'ver' so package names reflect OS at build time
- Always include x11-ssh-askpass tarball in SRPM
- Add openssh-x11-aspass BuildRequires for libXT-devel, imake, gtk2-devel
- Discard 'K5DIR' reporting, not usable inside 'mock' for RHEL 5 compatibility
- Discard obsolete '--with-rsh' configure option
- Update openssl-devel dependency to 0.9.8f, as found in autoconf

* Wed Jul 14 2010 Tim Rice 
- test for skip_x11_askpass (line 77) should have been for no_x11_askpass

* Mon Jun 2 2003 Damien Miller 
- Remove noip6 option. This may be controlled at run-time in client config
  file using new AddressFamily directive

* Mon May 12 2003 Damien Miller 
- Don't install profile.d scripts when not building with GNOME/GTK askpass
  (patch from [email protected])

* Tue Oct 01 2002 Damien Miller 
- Install ssh-agent setgid nobody to prevent ptrace() key theft attacks

* Mon Sep 30 2002 Damien Miller 
- Use contrib/ Makefile for building askpass programs

* Fri Jun 21 2002 Damien Miller 
- Merge in spec changes from [email protected] (Sebastian Pachuta)
- Add new {ssh,sshd}_config.5 manpages
- Add new ssh-keysign program and remove setuid from ssh client

* Fri May 10 2002 Damien Miller 
- Merge in spec changes from RedHat, reorgansie a little
- Add Privsep user, group and directory

* Thu Mar  7 2002 Nalin Dahyabhai  3.1p1-2
- bump and grind (through the build system)

* Thu Mar  7 2002 Nalin Dahyabhai  3.1p1-1
- require sharutils for building (mindrot #137)
- require db1-devel only when building for 6.x (#55105), which probably won't
  work anyway (3.1 requires OpenSSL 0.9.6 to build), but what the heck
- require pam-devel by file (not by package name) again
- add Markus's patch to compile with OpenSSL 0.9.5a (from
  http://bugzilla.mindrot.org/show_bug.cgi?id=141) and apply it if we're
  building for 6.x

* Thu Mar  7 2002 Nalin Dahyabhai  3.1p1-0
- update to 3.1p1

* Tue Mar  5 2002 Nalin Dahyabhai  SNAP-20020305
- update to SNAP-20020305
- drop debug patch, fixed upstream

* Wed Feb 20 2002 Nalin Dahyabhai  SNAP-20020220
- update to SNAP-20020220 for testing purposes (you've been warned, if there's
  anything to be warned about, gss patches won't apply, I don't mind)

* Wed Feb 13 2002 Nalin Dahyabhai  3.0.2p1-3
- add patches from Simon Wilkinson and Nicolas Williams for GSSAPI key
  exchange, authentication, and named key support

* Wed Jan 23 2002 Nalin Dahyabhai  3.0.2p1-2
- remove dependency on db1-devel, which has just been swallowed up whole
  by gnome-libs-devel

* Sat Dec 29 2001 Nalin Dahyabhai 
- adjust build dependencies so that build6x actually works right (fix
  from Hugo van der Kooij)

* Tue Dec  4 2001 Nalin Dahyabhai  3.0.2p1-1
- update to 3.0.2p1

* Fri Nov 16 2001 Nalin Dahyabhai  3.0.1p1-1
- update to 3.0.1p1

* Tue Nov 13 2001 Nalin Dahyabhai 
- update to current CVS (not for use in distribution)

* Thu Nov  8 2001 Nalin Dahyabhai  3.0p1-1
- merge some of Damien Miller  changes from the upstream
  3.0p1 spec file and init script

* Wed Nov  7 2001 Nalin Dahyabhai 
- update to 3.0p1
- update to x11-ssh-askpass 1.2.4.1
- change build dependency on a file from pam-devel to the pam-devel package
- replace primes with moduli

* Thu Sep 27 2001 Nalin Dahyabhai  2.9p2-9
- incorporate fix from Markus Friedl's advisory for IP-based authorization bugs

* Thu Sep 13 2001 Bernhard Rosenkraenzer  2.9p2-8
- Merge changes to rescue build from current sysadmin survival cd

* Thu Sep  6 2001 Nalin Dahyabhai  2.9p2-7
- fix scp's server's reporting of file sizes, and build with the proper
  preprocessor define to get large-file capable open(), stat(), etc.
  (sftp has been doing this correctly all along) (#51827)
- configure without --with-ipv4-default on RHL 7.x and newer (#45987,#52247)
- pull cvs patch to fix support for /etc/nologin for non-PAM logins (#47298)
- mark profile.d scriptlets as config files (#42337)
- refer to Jason Stone's mail for zsh workaround for exit-hanging quasi-bug
- change a couple of log() statements to debug() statements (#50751)
- pull cvs patch to add -t flag to sshd (#28611)
- clear fd_sets correctly (one bit per FD, not one byte per FD) (#43221)

* Mon Aug 20 2001 Nalin Dahyabhai  2.9p2-6
- add db1-devel as a BuildPrerequisite (noted by Hans Ecke)

* Thu Aug 16 2001 Nalin Dahyabhai 
- pull cvs patch to fix remote port forwarding with protocol 2

* Thu Aug  9 2001 Nalin Dahyabhai 
- pull cvs patch to add session initialization to no-pty sessions
- pull cvs patch to not cut off challengeresponse auth needlessly
- refuse to do X11 forwarding if xauth isn't there, handy if you enable
  it by default on a system that doesn't have X installed (#49263)

* Wed Aug  8 2001 Nalin Dahyabhai 
- don't apply patches to code we don't intend to build (spotted by Matt Galgoci)

* Mon Aug  6 2001 Nalin Dahyabhai 
- pass OPTIONS correctly to initlog (#50151)

* Wed Jul 25 2001 Nalin Dahyabhai 
- switch to x11-ssh-askpass 1.2.2

* Wed Jul 11 2001 Nalin Dahyabhai 
- rebuild in new environment

* Mon Jun 25 2001 Nalin Dahyabhai 
- disable the gssapi patch

* Mon Jun 18 2001 Nalin Dahyabhai 
- update to 2.9p2
- refresh to a new version of the gssapi patch

* Thu Jun  7 2001 Nalin Dahyabhai 
- change Copyright: BSD to License: BSD
- add Markus Friedl's unverified patch for the cookie file deletion problem
  so that we can verify it
- drop patch to check if xauth is present (was folded into cookie patch)
- don't apply gssapi patches for the errata candidate
- clear supplemental groups list at startup

* Fri May 25 2001 Nalin Dahyabhai 
- fix an error parsing the new default sshd_config
- add a fix from Markus Friedl (via openssh-unix-dev) for ssh-keygen not
  dealing with comments right

* Thu May 24 2001 Nalin Dahyabhai 
- add in Simon Wilkinson's GSSAPI patch to give it some testing in-house,
  to be removed before the next beta cycle because it's a big departure
  from the upstream version

* Thu May  3 2001 Nalin Dahyabhai 
- finish marking strings in the init script for translation
- modify init script to source /etc/sysconfig/sshd and pass $OPTIONS to sshd
  at startup (change merged from openssh.com init script, originally by
  Pekka Savola)
- refuse to do X11 forwarding if xauth isn't there, handy if you enable
  it by default on a system that doesn't have X installed

* Wed May  2 2001 Nalin Dahyabhai 
- update to 2.9
- drop various patches that came from or went upstream or to or from CVS

* Wed Apr 18 2001 Nalin Dahyabhai 
- only require initscripts 5.00 on 6.2 (reported by Peter Bieringer)

* Sun Apr  8 2001 Preston Brown 
- remove explicit openssl requirement, fixes builddistro issue
- make initscript stop() function wait until sshd really dead to avoid
  races in condrestart

* Mon Apr  2 2001 Nalin Dahyabhai 
- mention that challengereponse supports PAM, so disabling password doesn't
  limit users to pubkey and rsa auth (#34378)
- bypass the daemon() function in the init script and call initlog directly,
  because daemon() won't start a daemon it detects is already running (like
  open connections)
- require the version of openssl we had when we were built

* Fri Mar 23 2001 Nalin Dahyabhai 
- make do_pam_setcred() smart enough to know when to establish creds and
  when to reinitialize them
- add in a couple of other fixes from Damien for inclusion in the errata

* Thu Mar 22 2001 Nalin Dahyabhai 
- update to 2.5.2p2
- call setcred() again after initgroups, because the "creds" could actually
  be group memberships

* Tue Mar 20 2001 Nalin Dahyabhai 
- update to 2.5.2p1 (includes endianness fixes in the rijndael implementation)
- don't enable challenge-response by default until we find a way to not
  have too many userauth requests (we may make up to six pubkey and up to
  three password attempts as it is)
- remove build dependency on rsh to match openssh.com's packages more closely

* Sat Mar  3 2001 Nalin Dahyabhai 
- remove dependency on openssl -- would need to be too precise

* Fri Mar  2 2001 Nalin Dahyabhai 
- rebuild in new environment

* Mon Feb 26 2001 Nalin Dahyabhai 
- Revert the patch to move pam_open_session.
- Init script and spec file changes from Pekka Savola. (#28750)
- Patch sftp to recognize '-o protocol' arguments. (#29540)

* Thu Feb 22 2001 Nalin Dahyabhai 
- Chuck the closing patch.
- Add a trigger to add host keys for protocol 2 to the config file, now that
  configuration file syntax requires us to specify it with HostKey if we
  specify any other HostKey values, which we do.

* Tue Feb 20 2001 Nalin Dahyabhai 
- Redo patch to move pam_open_session after the server setuid()s to the user.
- Rework the nopam patch to use be picked up by autoconf.

* Mon Feb 19 2001 Nalin Dahyabhai 
- Update for 2.5.1p1.
- Add init script mods from Pekka Savola.
- Tweak the init script to match the CVS contrib script more closely.
- Redo patch to ssh-add to try to adding both identity and id_dsa to also try
  adding id_rsa.

* Fri Feb 16 2001 Nalin Dahyabhai 
- Update for 2.5.0p1.
- Use $RPM_OPT_FLAGS instead of -O when building gnome-ssh-askpass
- Resync with parts of Damien Miller's openssh.spec from CVS, including
  update of x11 askpass to 1.2.0.
- Only require openssl (don't prereq) because we generate keys in the init
  script now.

* Tue Feb 13 2001 Nalin Dahyabhai 
- Don't open a PAM session until we've forked and become the user (#25690).
- Apply Andrew Bartlett's patch for letting pam_authenticate() know which
  host the user is attempting a login from.
- Resync with parts of Damien Miller's openssh.spec from CVS.
- Don't expose KbdInt responses in debug messages (from CVS).
- Detect and handle errors in rsa_{public,private}_decrypt (from CVS).

* Wed Feb  7 2001 Trond Eivind Glomsrxd 
- i18n-tweak to initscript.

* Tue Jan 23 2001 Nalin Dahyabhai 
- More gettextizing.
- Close all files after going into daemon mode (needs more testing).
- Extract patch from CVS to handle auth banners (in the client).
- Extract patch from CVS to handle compat weirdness.

* Fri Jan 19 2001 Nalin Dahyabhai 
- Finish with the gettextizing.

* Thu Jan 18 2001 Nalin Dahyabhai 
- Fix a bug in auth2-pam.c (#23877)
- Gettextize the init script.

* Wed Dec 20 2000 Nalin Dahyabhai 
- Incorporate a switch for using PAM configs for 6.x, just in case.

* Tue Dec  5 2000 Nalin Dahyabhai 
- Incorporate Bero's changes for a build specifically for rescue CDs.

* Wed Nov 29 2000 Nalin Dahyabhai 
- Don't treat pam_setcred() failure as fatal unless pam_authenticate() has
  succeeded, to allow public-key authentication after a failure with "none"
  authentication.  (#21268)

* Tue Nov 28 2000 Nalin Dahyabhai 
- Update to x11-askpass 1.1.1. (#21301)
- Don't second-guess fixpaths, which causes paths to get fixed twice. (#21290)

* Mon Nov 27 2000 Nalin Dahyabhai 
- Merge multiple PAM text messages into subsequent prompts when possible when
  doing keyboard-interactive authentication.

* Sun Nov 26 2000 Nalin Dahyabhai 
- Disable the built-in MD5 password support.  We're using PAM.
- Take a crack at doing keyboard-interactive authentication with PAM, and
  enable use of it in the default client configuration so that the client
  will try it when the server disallows password authentication.
- Build with debugging flags.  Build root policies strip all binaries anyway.

* Tue Nov 21 2000 Nalin Dahyabhai 
- Use DESTDIR instead of %%makeinstall.
- Remove /usr/X11R6/bin from the path-fixing patch.

* Mon Nov 20 2000 Nalin Dahyabhai 
- Add the primes file from the latest snapshot to the main package (#20884).
- Add the dev package to the prereq list (#19984).
- Remove the default path and mimic login's behavior in the server itself.

* Fri Nov 17 2000 Nalin Dahyabhai 
- Resync with conditional options in Damien Miller's .spec file for an errata.
- Change libexecdir from %%{_libexecdir}/ssh to %%{_libexecdir}/openssh.

* Tue Nov  7 2000 Nalin Dahyabhai 
- Update to OpenSSH 2.3.0p1.
- Update to x11-askpass 1.1.0.
- Enable keyboard-interactive authentication.

* Mon Oct 30 2000 Nalin Dahyabhai 
- Update to ssh-askpass-x11 1.0.3.
- Change authentication related messages to be private (#19966).

* Tue Oct 10 2000 Nalin Dahyabhai 
- Patch ssh-keygen to be able to list signatures for DSA public key files
  it generates.

* Thu Oct  5 2000 Nalin Dahyabhai 
- Add BuildRequires on /usr/include/security/pam_appl.h to be sure we always
  build PAM authentication in.
- Try setting SSH_ASKPASS if gnome-ssh-askpass is installed.
- Clean out no-longer-used patches.
- Patch ssh-add to try to add both identity and id_dsa, and to error only
  when neither exists.

* Mon Oct  2 2000 Nalin Dahyabhai 
- Update x11-askpass to 1.0.2. (#17835)
- Add BuildRequiress for /bin/login and /usr/bin/rsh so that configure will
  always find them in the right place. (#17909)
- Set the default path to be the same as the one supplied by /bin/login, but
  add /usr/X11R6/bin. (#17909)
- Try to handle obsoletion of ssh-server more cleanly.  Package names
  are different, but init script name isn't. (#17865)

* Wed Sep  6 2000 Nalin Dahyabhai 
- Update to 2.2.0p1. (#17835)
- Tweak the init script to allow proper restarting. (#18023)

* Wed Aug 23 2000 Nalin Dahyabhai 
- Update to 20000823 snapshot.
- Change subpackage requirements from %%{version} to %%{version}-%%{release}
- Back out the pipe patch.

* Mon Jul 17 2000 Nalin Dahyabhai 
- Update to 2.1.1p4, which includes fixes for config file parsing problems.
- Move the init script back.
- Add Damien's quick fix for wackiness.

* Wed Jul 12 2000 Nalin Dahyabhai 
- Update to 2.1.1p3, which includes fixes for X11 forwarding and strtok().

* Thu Jul  6 2000 Nalin Dahyabhai 
- Move condrestart to server postun.
- Move key generation to init script.
- Actually use the right patch for moving the key generation to the init script.
- Clean up the init script a bit.

* Wed Jul  5 2000 Nalin Dahyabhai 
- Fix X11 forwarding, from mail post by Chan Shih-Ping Richard.

* Sun Jul  2 2000 Nalin Dahyabhai 
- Update to 2.1.1p2.
- Use of strtok() considered harmful.

* Sat Jul  1 2000 Nalin Dahyabhai 
- Get the build root out of the man pages.

* Thu Jun 29 2000 Nalin Dahyabhai 
- Add and use condrestart support in the init script.
- Add newer initscripts as a prereq.

* Tue Jun 27 2000 Nalin Dahyabhai 
- Build in new environment (release 2)
- Move -clients subpackage to Applications/Internet group

* Fri Jun  9 2000 Nalin Dahyabhai 
- Update to 2.2.1p1

* Sat Jun  3 2000 Nalin Dahyabhai 
- Patch to build with neither RSA nor RSAref.
- Miscellaneous FHS-compliance tweaks.
- Fix for possibly-compressed man pages.

* Wed Mar 15 2000 Damien Miller 
- Updated for new location
- Updated for new gnome-ssh-askpass build

* Sun Dec 26 1999 Damien Miller 
- Added Jim Knoble's  askpass

* Mon Nov 15 1999 Damien Miller 
- Split subpackages further based on patch from jim knoble 

* Sat Nov 13 1999 Damien Miller 
- Added 'Obsoletes' directives

* Tue Nov 09 1999 Damien Miller 
- Use make install
- Subpackages

* Mon Nov 08 1999 Damien Miller 
- Added links for slogin
- Fixed perms on manpages

* Sat Oct 30 1999 Damien Miller 
- Renamed init script

* Fri Oct 29 1999 Damien Miller 
- Back to old binary names

* Thu Oct 28 1999 Damien Miller 
- Use autoconf
- New binary names

* Wed Oct 27 1999 Damien Miller 
- Initial RPMification, based on Jan "Yenya" Kasprzak's  spec.

构建

rpmbuild -ba SPECS/openssh.spec

重新构建前清理

rm -rf BUILD/openssh-9.5p1/ RPMS/x86_64/openssh-* SRPMS/openssh-9.5p1-1.el7.src.rpm 

RPM包下载

https://download.csdn.net/download/ynz1220/88734573
(资源如果不能打开是可能正在审核中，可过一会儿或次日访问)

安装前

注意事项

• 升级安装后由于加密算法的区别，低版本的SSH工具可能无法连接，建议改用Xshell7或SecureCRT9.0以上版本；
• 临时增加telnet终端，验证telnet登录是否正常，并连接多个ssh终端操作；
• 升级前备份；
• 先在测试环境或局部升级，逐步推进；

配置备份文件的时间缀
export datetime=$(date +%Y%m%d-%H%M)

开启telnet(可选)

升级过程中，sshd可能无法使用，因此需要安装telnet服务【telnet服务依赖于xinetd服务】
yum install xinetd telnet-server

Linux系统中默认不允许root账户telnet远程登录，解决方法有二：
方法一：移除配置文件，保证root账户能够远程登录
#mv /etc/securetty /etc/securetty.bak-${datetime}

方法二：配置允许root账户telnet远程登录
实践中采用方法二

cp /etc/pam.d/login /etc/pam.d/login.bak-${datetime}
sed -i "2s/^/#/g" /etc/pam.d/login


#并添加超级用户登陆设备至/etc/securetty文件
cp /etc/securetty /etc/securetty.bak-${datetime}
for i in `seq 0 10`; do echo "pts/$i" >> /etc/securetty; done

方法二结束

启用telnet和xinetd服务
systemctl enable telnet.socket
systemctl start telnet.socket
systemctl enable xinetd
systemctl start xinetd
systemctl status xinetd
systemctl status telnet.socket

如果开启了selinux需关闭
getenforce
setenforce 0
防火墙临时允许telnet

验证telnet登录是否正常
telnet ip

备份openssl和openssh(可选)

备份操作在本文档构建的RPM包安装时会自动完成，当然也可以手动操作一遍

mv /usr/bin/openssl /usr/bin/openssl.bak-${datetime}
mv /usr/include/openssl /usr/include/openssl.bak-${datetime}  #实际发现这个目录不存在
ls -l /usr/lib64/libssl.so #确认是否是软链接，和真实文件路径，以备还原，实际发现这个路径不存在
unlink /usr/lib64/libssl.so

mv /etc/ssh /etc/ssh.bak-${datetime}
mkdir /usr/bin/bak-${datetime}
ls -l /usr/bin/{scp,sftp,ssh,ssh-add,ssh-agent,ssh-keygen,ssh-keyscan} # 注：如果是软链接，没有备份必要，下列文件同理。发现实际上都不是软链接
cp -apf /usr/bin/{scp,sftp,ssh,ssh-add,ssh-agent,ssh-keygen,ssh-keyscan} /usr/bin/bak-${datetime}/
cp -apf /usr/sbin/sshd /usr/sbin/sshd.bak-${datetime}
cp -apf /etc/sysconfig/sshd /etc/sysconfig/sshd.bak-${datetime}
cp -apf /etc/pam.d/sshd /etc/pam.d/sshd.bak-${datetime}

安装

rpm -Uvh openssh-*.rpm --force --nodeps

遗留问题

在某些CentOS7上装好重启sshd时，会卡住，但不影响SSH连接，但有些系统正常，偿试过DNS、GSAPI无关，待深入排查，欢迎反馈和探讨。

验证升级结果

ssh -V

远程连接验证

回退

${datetime}为RPM包安装时为备份文件创建而生成的时间缀，假设为20240110-2000
执行：
datetime=20240110-2000

回滚openssl

/bin/cp -ap /usr/bin/openssl.bak-${datetime} /usr/bin/openssl
/bin/cp -ap /usr/include/openssl.bak-${datetime} /usr/include/openssl

验证结果:
openssl version
输出:
OpenSSL 1.0.2k-fips 26 Jan 2017

回滚openssh

rm -rf /etc/ssh 
datetime=备份时的时间缀
/bin/cp -ap /etc/ssh.bak-${datetime} /etc/ssh
/bin/cp -ap /usr/bin/bak-${datetime}/{scp,sftp,ssh,ssh-add,ssh-agent,ssh-keygen,ssh-keyscan} /usr/bin/
/bin/cp -ap /usr/sbin/sshd.bak-${datetime} /usr/sbin/sshd
/bin/cp -ap /etc/sysconfig/sshd.bak-${datetime} /etc/sysconfig/sshd
/bin/cp -ap /etc/pam.d/sshd.bak-${datetime} /etc/pam.d/sshd

mv /usr/lib/systemd/system/sshd.service.bak-${datetime} /usr/lib/systemd/system/sshd.service
systemctl daemon-reload
systemctl restart sshd

#回滚后验证结果
ssh -V
远程连接验证

现场整理或清理

关闭telnet和xinetd服务

systemctl disable telnet.socket
systemctl stop telnet.socket
systemctl disable xinetd
systemctl stop xinetd
systemctl status xinetd
systemctl status telnet.socket

cp -ap /etc/pam.d/login.bak-${datetime} /etc/pam.d/login
cp -ap /etc/securetty.bak-${datetime} /etc/securetty

防火墙策略还原

清理为telnet开启的白名单策略