Merge pull request #30777 from poettering/ssh-generator

ssh-generator which makes VMs and containers accessible to ssh via AF_UNIX and AF_VSOCK
2024-01-11 21:31:28 +01:00
parent 25f8d3856a 9a1dc7549f
commit 28795e4dca
27 changed files with 1230 additions and 32 deletions
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -eux
+set -o pipefail
+
+if ! command -v ssh &> /dev/null || ! command -v sshd &> /dev/null ; then
+    echo "ssh/sshd not found, skipping test." >&2
+    exit 0
+fi
+
+systemctl -q is-active sshd-unix-local.socket
+
+if test -e /dev/vsock ; then
+    systemctl -q is-active sshd-vsock.socket
+fi
+
+if test -d /run/host/unix-export ; then
+    systemctl -q is-active sshd-unix-export.socket
+fi
+
+# FIXME: sshd seems to crash inside asan currently, skip the actual ssh test hence
+if [[ -v ASAN_OPTIONS ]] ; then
+    exit 0
+fi
+
+ROOTID=$(mktemp -u)
+
+removesshid() {
+    rm -f "$ROOTID" "$ROOTID".pub
+}
+
+ssh-keygen -N '' -C '' -t rsa -f "$ROOTID"
+
+mkdir -p 0700 /root/.ssh
+cat "$ROOTID".pub >> /root/.ssh/authorized_keys
+
+# set root pw to "foo", just to set it to something valid
+# shellcheck disable=SC2016
+usermod -p '$5$AAy6BYJ6rzz.QELv$6LpVEU3/RQmVz.svHu/33qoJWWWzZuJ3DM2fo9JgcUD' root
+usermod -U root
+
+mkdir -p /etc/ssh
+test -f /etc/ssh/ssh_host_rsa_key || ssh-keygen -t rsa -C '' -N '' -f /etc/ssh/ssh_host_rsa_key
+echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
+echo "LogLevel DEBUG3" >> /etc/ssh/sshd_config
+
+test -f /etc/ssh/ssh_config || echo 'Include /etc/ssh/ssh_config.d/*.conf' > /etc/ssh/ssh_config
+
+# ssh wants this dir around, but distros cannot agree on a common name for it, let's just create all that are aware of distros use
+mkdir -p /usr/share/empty.sshd /var/empty /var/empty/sshd
+
+ssh -o StrictHostKeyChecking=no -v -i "$ROOTID" .host cat /etc/machine-id | cmp - /etc/machine-id
+ssh -o StrictHostKeyChecking=no -v -i "$ROOTID" unix/run/ssh-unix-local/socket cat /etc/machine-id | cmp - /etc/machine-id
+
+modprobe vsock_loopback ||:
+if test -e /dev/vsock -a -d /sys/module/vsock_loopback ; then
+    ssh -o StrictHostKeyChecking=no -v -i "$ROOTID" vsock/1 cat /etc/machine-id | cmp - /etc/machine-id
+fi