net-misc/openssh-8.3_p1-r3: Add default-off USE flag for scp (bug #733802)

Bug: https://bugs.gentoo.org/733802
Package-Manager: Portage-3.0.0, Repoman-2.3.23
Signed-off-by: Patrick McLean <chutzpah@gentoo.org>

2 files changed, 499 insertions, 0 deletions

diff --git a/net-misc/openssh/metadata.xml b/net-misc/openssh/metadata.xml
index 2a8ac0609ece..9ce34e610701 100644
--- a/net-misc/openssh/metadata.xml
+++ b/net-misc/openssh/metadata.xml
@@ -21,6 +21,7 @@ ssh-keygen and sftp-server. OpenSSH supports SSH protocol versions 1.3, 1.5, and
 </longdescription>
   <use>
     <flag name="bindist">Disable EC/RC5 algorithms in OpenSSL for patent reasons.</flag>
+    <flag name="scp">Enable scp command with known security problems. See bug 733802</flag>
     <flag name="hpn">Enable high performance ssh</flag>
     <flag name="ldns">Use LDNS for DNSSEC/SSHFP validation.</flag>
     <flag name="livecd">Enable root password logins for live-cd environment.</flag>
diff --git a/net-misc/openssh/openssh-8.3_p1-r3.ebuild b/net-misc/openssh/openssh-8.3_p1-r3.ebuild
new file mode 100644
index 000000000000..6a9b9b724f8b
--- /dev/null
+++ b/net-misc/openssh/openssh-8.3_p1-r3.ebuild
@@ -0,0 +1,498 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit user-info flag-o-matic multilib autotools pam systemd toolchain-funcs
+
+# Make it more portable between straight releases
+# and _p? releases.
+PARCH=${P/_}
+
+# PV to USE for HPN patches
+#HPN_PV="${PV^^}"
+HPN_PV="8.1_P1"
+
+HPN_VER="14.20"
+HPN_PATCHES=(
+	${PN}-${HPN_PV/./_}-hpn-DynWinNoneSwitch-${HPN_VER}.diff
+	${PN}-${HPN_PV/./_}-hpn-AES-CTR-${HPN_VER}.diff
+	${PN}-${HPN_PV/./_}-hpn-PeakTput-${HPN_VER}.diff
+)
+
+SCTP_VER="1.2" SCTP_PATCH="${PARCH}-sctp-${SCTP_VER}.patch.xz"
+X509_VER="12.5.1" X509_PATCH="${PARCH}+x509-${X509_VER}.diff.gz"
+
+DESCRIPTION="Port of OpenBSD's free SSH release"
+HOMEPAGE="https://www.openssh.com/"
+SRC_URI="mirror://openbsd/OpenSSH/portable/${PARCH}.tar.gz
+	${SCTP_PATCH:+sctp? ( https://dev.gentoo.org/~chutzpah/dist/openssh/${SCTP_PATCH} )}
+	${HPN_VER:+hpn? ( $(printf "mirror://sourceforge/hpnssh/HPN-SSH%%20${HPN_VER/./v}%%20${HPN_PV/_P/p}/%s\n" "${HPN_PATCHES[@]}") )}
+	${X509_PATCH:+X509? ( https://roumenpetrov.info/openssh/x509-${X509_VER}/${X509_PATCH} )}
+"
+S="${WORKDIR}/${PARCH}"
+
+LICENSE="BSD GPL-2"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~ppc-aix ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~m68k-mint ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+# Probably want to drop ssl defaulting to on in a future version.
+IUSE="abi_mips_n32 audit bindist debug hpn kerberos kernel_linux ldns libedit libressl livecd pam +pie scp sctp security-key selinux +ssl static test X X509 xmss"
+
+RESTRICT="!test? ( test )"
+
+REQUIRED_USE="
+	ldns? ( ssl )
+	pie? ( !static )
+	static? ( !kerberos !pam )
+	X509? ( !sctp !security-key ssl !xmss )
+	xmss? ( || ( ssl libressl ) )
+	test? ( ssl )
+"
+
+LIB_DEPEND="
+	audit? ( sys-process/audit[static-libs(+)] )
+	ldns? (
+		net-libs/ldns[static-libs(+)]
+		!bindist? ( net-libs/ldns[ecdsa,ssl(+)] )
+		bindist? ( net-libs/ldns[-ecdsa,ssl(+)] )
+	)
+	libedit? ( dev-libs/libedit:=[static-libs(+)] )
+	sctp? ( net-misc/lksctp-tools[static-libs(+)] )
+	security-key? ( >=dev-libs/libfido2-1.4.0:=[static-libs(+)] )
+	selinux? ( >=sys-libs/libselinux-1.28[static-libs(+)] )
+	ssl? (
+		!libressl? (
+			|| (
+				(
+					>=dev-libs/openssl-1.0.1:0[bindist=]
+					<dev-libs/openssl-1.1.0:0[bindist=]
+				)
+				>=dev-libs/openssl-1.1.0g:0[bindist=]
+			)
+			dev-libs/openssl:0=[static-libs(+)]
+		)
+		libressl? ( dev-libs/libressl:0=[static-libs(+)] )
+	)
+	virtual/libcrypt:=[static-libs(+)]
+	>=sys-libs/zlib-1.2.3:=[static-libs(+)]
+"
+RDEPEND="
+	acct-group/sshd
+	acct-user/sshd
+	!static? ( ${LIB_DEPEND//\[static-libs(+)]} )
+	pam? ( sys-libs/pam )
+	kerberos? ( virtual/krb5 )
+"
+DEPEND="${RDEPEND}
+	static? ( ${LIB_DEPEND} )
+	virtual/os-headers
+"
+RDEPEND="${RDEPEND}
+	pam? ( >=sys-auth/pambase-20081028 )
+	userland_GNU? ( !prefix? ( sys-apps/shadow ) )
+	X? ( x11-apps/xauth )
+"
+BDEPEND="
+	virtual/pkgconfig
+	sys-devel/autoconf
+"
+
+pkg_pretend() {
+	# this sucks, but i'd rather have people unable to `emerge -u openssh`
+	# than not be able to log in to their server any more
+	maybe_fail() { [[ -z ${!2} ]] && echo "$1" ; }
+	local fail="
+		$(use hpn && maybe_fail hpn HPN_VER)
+		$(use sctp && maybe_fail sctp SCTP_PATCH)
+		$(use X509 && maybe_fail X509 X509_PATCH)
+	"
+	fail=$(echo ${fail})
+	if [[ -n ${fail} ]] ; then
+		eerror "Sorry, but this version does not yet support features"
+		eerror "that you requested:	 ${fail}"
+		eerror "Please mask ${PF} for now and check back later:"
+		eerror " # echo '=${CATEGORY}/${PF}' >> /etc/portage/package.mask"
+		die "booooo"
+	fi
+
+	# Make sure people who are using tcp wrappers are notified of its removal. #531156
+	if grep -qs '^ *sshd *:' "${EROOT}"/etc/hosts.{allow,deny} ; then
+		ewarn "Sorry, but openssh no longer supports tcp-wrappers, and it seems like"
+		ewarn "you're trying to use it.  Update your ${EROOT}/etc/hosts.{allow,deny} please."
+	fi
+}
+
+src_prepare() {
+	sed -i \
+		-e "/_PATH_XAUTH/s:/usr/X11R6/bin/xauth:${EPREFIX}/usr/bin/xauth:" \
+		pathnames.h || die
+
+	# don't break .ssh/authorized_keys2 for fun
+	sed -i '/^AuthorizedKeysFile/s:^:#:' sshd_config || die
+
+	eapply "${FILESDIR}"/${PN}-7.9_p1-include-stdlib.patch
+	eapply "${FILESDIR}"/${PN}-8.2_p1-GSSAPI-dns.patch #165444 integrated into gsskex
+	eapply "${FILESDIR}"/${PN}-6.7_p1-openssl-ignore-status.patch
+	eapply "${FILESDIR}"/${PN}-7.5_p1-disable-conch-interop-tests.patch
+	eapply "${FILESDIR}"/${PN}-8.0_p1-fix-putty-tests.patch
+	eapply "${FILESDIR}"/${PN}-8.0_p1-deny-shmget-shmat-shmdt-in-preauth-privsep-child.patch
+
+	[[ -d ${WORKDIR}/patches ]] && eapply "${WORKDIR}"/patches
+
+	local PATCHSET_VERSION_MACROS=()
+
+	if use X509 ; then
+		pushd "${WORKDIR}" &>/dev/null || die
+		eapply "${FILESDIR}/${P}-X509-glue-"${X509_VER}".patch"
+		popd &>/dev/null || die
+
+		eapply "${WORKDIR}"/${X509_PATCH%.*}
+
+		# We need to patch package version or any X.509 sshd will reject our ssh client
+		# with "userauth_pubkey: could not parse key: string is too large [preauth]"
+		# error
+		einfo "Patching package version for X.509 patch set ..."
+		sed -i \
+			-e "s/^AC_INIT(\[OpenSSH\], \[Portable\]/AC_INIT([OpenSSH], [${X509_VER}]/" \
+			"${S}"/configure.ac || die "Failed to patch package version for X.509 patch"
+
+		einfo "Patching version.h to expose X.509 patch set ..."
+		sed -i \
+			-e "/^#define SSH_PORTABLE.*/a #define SSH_X509               \"-PKIXSSH-${X509_VER}\"" \
+			"${S}"/version.h || die "Failed to sed-in X.509 patch version"
+		PATCHSET_VERSION_MACROS+=( 'SSH_X509' )
+	fi
+
+	if use sctp ; then
+		eapply "${WORKDIR}"/${SCTP_PATCH%.*}
+
+		einfo "Patching version.h to expose SCTP patch set ..."
+		sed -i \
+			-e "/^#define SSH_PORTABLE/a #define SSH_SCTP        \"-sctp-${SCTP_VER}\"" \
+			"${S}"/version.h || die "Failed to sed-in SCTP patch version"
+		PATCHSET_VERSION_MACROS+=( 'SSH_SCTP' )
+
+		einfo "Disabling know failing test (cfgparse) caused by SCTP patch ..."
+		sed -i \
+			-e "/\t\tcfgparse \\\/d" \
+			"${S}"/regress/Makefile || die "Failed to disable known failing test (cfgparse) caused by SCTP patch"
+	fi
+
+	if use hpn ; then
+		local hpn_patchdir="${T}/${P}-hpn${HPN_VER}"
+		mkdir "${hpn_patchdir}" || die
+		cp $(printf -- "${DISTDIR}/%s\n" "${HPN_PATCHES[@]}") "${hpn_patchdir}" || die
+		pushd "${hpn_patchdir}" &>/dev/null || die
+		eapply "${FILESDIR}"/${P}-hpn-${HPN_VER}-glue.patch
+		eapply "${FILESDIR}"/${PN}-8.2_p1-hpn-${HPN_VER}-libressl.patch
+		if use X509; then
+		#	einfo "Will disable MT AES cipher due to incompatbility caused by X509 patch set"
+		#	# X509 and AES-CTR-MT don't get along, let's just drop it
+		#	rm openssh-${HPN_PV//./_}-hpn-AES-CTR-${HPN_VER}.diff || die
+
+			eapply "${FILESDIR}"/${PN}-8.2_p1-hpn-${HPN_VER}-X509-glue.patch
+		fi
+		use sctp && eapply "${FILESDIR}"/${PN}-8.2_p1-hpn-${HPN_VER}-sctp-glue.patch
+		popd &>/dev/null || die
+
+		eapply "${hpn_patchdir}"
+
+		use X509 || eapply "${FILESDIR}/openssh-8.0_p1-hpn-version.patch"
+
+		einfo "Patching Makefile.in for HPN patch set ..."
+		sed -i \
+			-e "/^LIBS=/ s/\$/ -lpthread/" \
+			"${S}"/Makefile.in || die "Failed to patch Makefile.in"
+
+		einfo "Patching version.h to expose HPN patch set ..."
+		sed -i \
+			-e "/^#define SSH_PORTABLE/a #define SSH_HPN         \"-hpn${HPN_VER//./v}\"" \
+			"${S}"/version.h || die "Failed to sed-in HPN patch version"
+		PATCHSET_VERSION_MACROS+=( 'SSH_HPN' )
+
+		if [[ -n "${HPN_DISABLE_MTAES}" ]] ; then
+			einfo "Disabling known non-working MT AES cipher per default ..."
+
+			cat > "${T}"/disable_mtaes.conf <<- EOF
+
+			# HPN's Multi-Threaded AES CTR cipher is currently known to be broken
+			# and therefore disabled per default.
+			DisableMTAES yes
+			EOF
+			sed -i \
+				-e "/^#HPNDisabled.*/r ${T}/disable_mtaes.conf" \
+				"${S}"/sshd_config || die "Failed to disabled MT AES ciphers in sshd_config"
+
+			sed -i \
+				-e "/AcceptEnv.*_XXX_TEST$/a \\\tDisableMTAES\t\tyes" \
+				"${S}"/regress/test-exec.sh || die "Failed to disable MT AES ciphers in test config"
+		fi
+	fi
+
+	if use X509 || use sctp || use hpn ; then
+		einfo "Patching sshconnect.c to use SSH_RELEASE in send_client_banner() ..."
+		sed -i \
+			-e "s/PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_VERSION/PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_RELEASE/" \
+			"${S}"/sshconnect.c || die "Failed to patch send_client_banner() to use SSH_RELEASE (sshconnect.c)"
+
+		einfo "Patching sshd.c to use SSH_RELEASE in sshd_exchange_identification() ..."
+		sed -i \
+			-e "s/PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_VERSION/PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_RELEASE/" \
+			"${S}"/sshd.c || die "Failed to patch sshd_exchange_identification() to use SSH_RELEASE (sshd.c)"
+
+		einfo "Patching version.h to add our patch sets to SSH_RELEASE ..."
+		sed -i \
+			-e "s/^#define SSH_RELEASE.*/#define SSH_RELEASE     SSH_VERSION SSH_PORTABLE ${PATCHSET_VERSION_MACROS[*]}/" \
+			"${S}"/version.h || die "Failed to patch SSH_RELEASE (version.h)"
+	fi
+
+	sed -i \
+		-e "/#UseLogin no/d" \
+		"${S}"/sshd_config || die "Failed to remove removed UseLogin option (sshd_config)"
+
+	eapply_user #473004
+
+	# These tests are currently incompatible with PORTAGE_TMPDIR/sandbox
+	sed -e '/\t\tpercent \\/ d' \
+		-i regress/Makefile || die
+
+	tc-export PKG_CONFIG
+	local sed_args=(
+		-e "s:-lcrypto:$(${PKG_CONFIG} --libs openssl):"
+		# Disable PATH reset, trust what portage gives us #254615
+		-e 's:^PATH=/:#PATH=/:'
+		# Disable fortify flags ... our gcc does this for us
+		-e 's:-D_FORTIFY_SOURCE=2::'
+	)
+
+	# The -ftrapv flag ICEs on hppa #505182
+	use hppa && sed_args+=(
+		-e '/CFLAGS/s:-ftrapv:-fdisable-this-test:'
+		-e '/OSSH_CHECK_CFLAG_LINK.*-ftrapv/d'
+	)
+	# _XOPEN_SOURCE causes header conflicts on Solaris
+	[[ ${CHOST} == *-solaris* ]] && sed_args+=(
+		-e 's/-D_XOPEN_SOURCE//'
+	)
+	sed -i "${sed_args[@]}" configure{.ac,} || die
+
+	eautoreconf
+}
+
+src_configure() {
+	addwrite /dev/ptmx
+
+	use debug && append-cppflags -DSANDBOX_SECCOMP_FILTER_DEBUG
+	use static && append-ldflags -static
+	use xmss && append-cflags -DWITH_XMSS
+
+	local myconf=(
+		--with-ldflags="${LDFLAGS}"
+		--disable-strip
+		--with-pid-dir="${EPREFIX}"$(usex kernel_linux '' '/var')/run
+		--sysconfdir="${EPREFIX}"/etc/ssh
+		--libexecdir="${EPREFIX}"/usr/$(get_libdir)/misc
+		--datadir="${EPREFIX}"/usr/share/openssh
+		--with-privsep-path="${EPREFIX}"/var/empty
+		--with-privsep-user=sshd
+		$(use_with audit audit linux)
+		$(use_with kerberos kerberos5 "${EPREFIX}"/usr)
+		# We apply the sctp patch conditionally, so can't pass --without-sctp
+		# unconditionally else we get unknown flag warnings.
+		$(use sctp && use_with sctp)
+		$(use_with ldns ldns "${EPREFIX}"/usr)
+		$(use_with libedit)
+		$(use_with pam)
+		$(use_with pie)
+		$(use_with selinux)
+		$(usex X509 '' "$(use_with security-key security-key-builtin)")
+		$(use_with ssl openssl)
+		$(use_with ssl md5-passwords)
+		$(use_with ssl ssl-engine)
+		$(use_with !elibc_Cygwin hardening) #659210
+	)
+
+	# stackprotect is broken on musl x86 and ppc
+	use elibc_musl && ( use x86 || use ppc ) && myconf+=( --without-stackprotect )
+
+	# The seccomp sandbox is broken on x32, so use the older method for now. #553748
+	use amd64 && [[ ${ABI} == "x32" ]] && myconf+=( --with-sandbox=rlimit )
+
+	econf "${myconf[@]}"
+}
+
+src_test() {
+	local t skipped=() failed=() passed=()
+	local tests=( interop-tests compat-tests )
+
+	local shell=$(egetshell "${UID}")
+	if [[ ${shell} == */nologin ]] || [[ ${shell} == */false ]] ; then
+		elog "Running the full OpenSSH testsuite requires a usable shell for the 'portage'"
+		elog "user, so we will run a subset only."
+		skipped+=( tests )
+	else
+		tests+=( tests )
+	fi
+
+	# It will also attempt to write to the homedir .ssh.
+	local sshhome=${T}/homedir
+	mkdir -p "${sshhome}"/.ssh
+	for t in "${tests[@]}" ; do
+		# Some tests read from stdin ...
+		HOMEDIR="${sshhome}" HOME="${sshhome}" TMPDIR="${T}" \
+			SUDO="" SSH_SK_PROVIDER="" \
+			TEST_SSH_UNSAFE_PERMISSIONS=1 \
+			emake -k -j1 ${t} </dev/null \
+				&& passed+=( "${t}" ) \
+				|| failed+=( "${t}" )
+	done
+
+	einfo "Passed tests: ${passed[*]}"
+	[[ ${#skipped[@]} -gt 0 ]] && ewarn "Skipped tests: ${skipped[*]}"
+	[[ ${#failed[@]}  -gt 0 ]] && die "Some tests failed: ${failed[*]}"
+}
+
+# Gentoo tweaks to default config files.
+tweak_ssh_configs() {
+	local locale_vars=(
+		# These are language variables that POSIX defines.
+		# http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_02
+		LANG LC_ALL LC_COLLATE LC_CTYPE LC_MESSAGES LC_MONETARY LC_NUMERIC LC_TIME
+
+		# These are the GNU extensions.
+		# https://www.gnu.org/software/autoconf/manual/html_node/Special-Shell-Variables.html
+		LANGUAGE LC_ADDRESS LC_IDENTIFICATION LC_MEASUREMENT LC_NAME LC_PAPER LC_TELEPHONE
+	)
+
+	# First the server config.
+	cat <<-EOF >> "${ED}"/etc/ssh/sshd_config
+
+	# Allow client to pass locale environment variables. #367017
+	AcceptEnv ${locale_vars[*]}
+
+	# Allow client to pass COLORTERM to match TERM. #658540
+	AcceptEnv COLORTERM
+	EOF
+
+	# Then the client config.
+	cat <<-EOF >> "${ED}"/etc/ssh/ssh_config
+
+	# Send locale environment variables. #367017
+	SendEnv ${locale_vars[*]}
+
+	# Send COLORTERM to match TERM. #658540
+	SendEnv COLORTERM
+	EOF
+
+	if use pam ; then
+		sed -i \
+			-e "/^#UsePAM /s:.*:UsePAM yes:" \
+			-e "/^#PasswordAuthentication /s:.*:PasswordAuthentication no:" \
+			-e "/^#PrintMotd /s:.*:PrintMotd no:" \
+			-e "/^#PrintLastLog /s:.*:PrintLastLog no:" \
+			"${ED}"/etc/ssh/sshd_config || die
+	fi
+
+	if use livecd ; then
+		sed -i \
+			-e '/^#PermitRootLogin/c# Allow root login with password on livecds.\nPermitRootLogin Yes' \
+			"${ED}"/etc/ssh/sshd_config || die
+	fi
+}
+
+src_install() {
+	emake install-nokeys DESTDIR="${D}"
+	fperms 600 /etc/ssh/sshd_config
+	dobin contrib/ssh-copy-id
+	newinitd "${FILESDIR}"/sshd-r1.initd sshd
+	newconfd "${FILESDIR}"/sshd-r1.confd sshd
+
+	newpamd "${FILESDIR}"/sshd.pam_include.2 sshd
+
+	tweak_ssh_configs
+
+	doman contrib/ssh-copy-id.1
+	dodoc CREDITS OVERVIEW README* TODO sshd_config
+	use hpn && dodoc HPN-README
+	use X509 || dodoc ChangeLog
+
+	diropts -m 0700
+	dodir /etc/skel/.ssh
+
+	# https://bugs.gentoo.org/733802
+	if ! use scp; then
+		rm "${D}"/usr/{bin/scp,share/man/man1/scp.1} \
+			|| die "failed to remove scp"
+	fi
+
+	keepdir /var/empty
+
+	systemd_dounit "${FILESDIR}"/sshd.{service,socket}
+	systemd_newunit "${FILESDIR}"/sshd_at.service 'sshd@.service'
+}
+
+pkg_preinst() {
+	if ! use ssl && has_version "${CATEGORY}/${PN}[ssl]"; then
+		show_ssl_warning=1
+	fi
+}
+
+pkg_postinst() {
+	local old_ver
+	for old_ver in ${REPLACING_VERSIONS}; do
+		if ver_test "${old_ver}" -lt "5.8_p1"; then
+			elog "Starting with openssh-5.8p1, the server will default to a newer key"
+			elog "algorithm (ECDSA).  You are encouraged to manually update your stored"
+			elog "keys list as servers update theirs.  See ssh-keyscan(1) for more info."
+		fi
+		if ver_test "${old_ver}" -lt "7.0_p1"; then
+			elog "Starting with openssh-6.7, support for USE=tcpd has been dropped by upstream."
+			elog "Make sure to update any configs that you might have.  Note that xinetd might"
+			elog "be an alternative for you as it supports USE=tcpd."
+		fi
+		if ver_test "${old_ver}" -lt "7.1_p1"; then #557388 #555518
+			elog "Starting with openssh-7.0, support for ssh-dss keys were disabled due to their"
+			elog "weak sizes.  If you rely on these key types, you can re-enable the key types by"
+			elog "adding to your sshd_config or ~/.ssh/config files:"
+			elog "	PubkeyAcceptedKeyTypes=+ssh-dss"
+			elog "You should however generate new keys using rsa or ed25519."
+
+			elog "Starting with openssh-7.0, the default for PermitRootLogin changed from 'yes'"
+			elog "to 'prohibit-password'.  That means password auth for root users no longer works"
+			elog "out of the box.  If you need this, please update your sshd_config explicitly."
+		fi
+		if ver_test "${old_ver}" -lt "7.6_p1"; then
+			elog "Starting with openssh-7.6p1, openssh upstream has removed ssh1 support entirely."
+			elog "Furthermore, rsa keys with less than 1024 bits will be refused."
+		fi
+		if ver_test "${old_ver}" -lt "7.7_p1"; then
+			elog "Starting with openssh-7.7p1, we no longer patch openssh to provide LDAP functionality."
+			elog "Install sys-auth/ssh-ldap-pubkey and use OpenSSH's \"AuthorizedKeysCommand\" option"
+			elog "if you need to authenticate against LDAP."
+			elog "See https://wiki.gentoo.org/wiki/SSH/LDAP_migration for more details."
+		fi
+		if ver_test "${old_ver}" -lt "8.2_p1"; then
+			ewarn "After upgrading to openssh-8.2p1 please restart sshd, otherwise you"
+			ewarn "will not be able to establish new sessions. Restarting sshd over a ssh"
+			ewarn "connection is generally safe."
+		fi
+	done
+
+	if [[ -n ${show_ssl_warning} ]]; then
+		elog "Be aware that by disabling openssl support in openssh, the server and clients"
+		elog "no longer support dss/rsa/ecdsa keys.  You will need to generate ed25519 keys"
+		elog "and update all clients/servers that utilize them."
+	fi
+
+	if use hpn && [[ -n "${HPN_DISABLE_MTAES}" ]] ; then
+		elog ""
+		elog "HPN's multi-threaded AES CTR cipher is currently known to be broken"
+		elog "and therefore disabled at runtime per default."
+		elog "Make sure your sshd_config is up to date and contains"
+		elog ""
+		elog "  DisableMTAES yes"
+		elog ""
+		elog "Otherwise you maybe unable to connect to this sshd using any AES CTR cipher."
+		elog ""
+	fi
+}