3 files changed, 59 insertions, 0 deletions
diff --git a/docker/root/etc/s6/openssh/finish b/docker/root/etc/s6/openssh/finish
new file mode 100755
index 00000000..06bd9865
--- /dev/null
+++ b/docker/root/etc/s6/openssh/finish
@@ -0,0 +1,2 @@
+#!/bin/bash
+exit 0
diff --git a/docker/root/etc/s6/openssh/run b/docker/root/etc/s6/openssh/run
new file mode 100755
index 00000000..a40b5b11
--- /dev/null
+++ b/docker/root/etc/s6/openssh/run
@@ -0,0 +1,6 @@
+#!/bin/bash
+[[ -f ./setup ]] && source ./setup
+
+pushd /root >/dev/null
+exec su-exec root /usr/sbin/sshd -D -e 2>&1
+popd
diff --git a/docker/root/etc/s6/openssh/setup b/docker/root/etc/s6/openssh/setup
new file mode 100755
index 00000000..dbb3bafd
--- /dev/null
+++ b/docker/root/etc/s6/openssh/setup
@@ -0,0 +1,51 @@
+#!/bin/bash
+
+if [ ! -d /data/ssh ]; then
+    mkdir -p /data/ssh
+fi
+
+if [ ! -f /data/ssh/ssh_host_ed25519_key ]; then
+    echo "Generating /data/ssh/ssh_host_ed25519_key..."
+    ssh-keygen -t ed25519 -f /data/ssh/ssh_host_ed25519_key -N "" > /dev/null
+fi
+
+if [ ! -f /data/ssh/ssh_host_rsa_key ]; then
+    echo "Generating /data/ssh/ssh_host_rsa_key..."
+    ssh-keygen -t rsa -b 3072 -f /data/ssh/ssh_host_rsa_key -N "" > /dev/null
+fi
+
+if [ ! -f /data/ssh/ssh_host_ecdsa_key ]; then
+    echo "Generating /data/ssh/ssh_host_ecdsa_key..."
+    ssh-keygen -t ecdsa -b 256 -f /data/ssh/ssh_host_ecdsa_key -N "" > /dev/null
+fi
+
+if [ -e /data/ssh/ssh_host_ed25519_cert ]; then
+  SSH_ED25519_CERT=${SSH_ED25519_CERT:-"/data/ssh/ssh_host_ed25519_cert"}
+fi
+
+if [ -e /data/ssh/ssh_host_rsa_cert ]; then
+  SSH_RSA_CERT=${SSH_RSA_CERT:-"/data/ssh/ssh_host_rsa_cert"}
+fi
+
+if [ -e /data/ssh/ssh_host_ecdsa_cert ]; then
+  SSH_ECDSA_CERT=${SSH_ECDSA_CERT:-"/data/ssh/ssh_host_ecdsa_cert"}
+fi
+
+if [ -d /etc/ssh ]; then
+    SSH_PORT=${SSH_PORT:-"22"} \
+    SSH_LISTEN_PORT=${SSH_LISTEN_PORT:-"${SSH_PORT}"} \
+    SSH_ED25519_CERT="${SSH_ED25519_CERT:+"HostCertificate "}${SSH_ED25519_CERT}" \
+    SSH_RSA_CERT="${SSH_RSA_CERT:+"HostCertificate "}${SSH_RSA_CERT}" \
+    SSH_ECDSA_CERT="${SSH_ECDSA_CERT:+"HostCertificate "}${SSH_ECDSA_CERT}" \
+    SSH_MAX_STARTUPS="${SSH_MAX_STARTUPS:+"MaxStartups "}${SSH_MAX_STARTUPS}" \
+    SSH_MAX_SESSIONS="${SSH_MAX_SESSIONS:+"MaxSessions "}${SSH_MAX_SESSIONS}" \
+    SSH_INCLUDE_FILE="${SSH_INCLUDE_FILE:+"Include "}${SSH_INCLUDE_FILE}" \
+    SSH_LOG_LEVEL=${SSH_LOG_LEVEL:-"INFO"} \
+    envsubst < /etc/templates/sshd_config > /etc/ssh/sshd_config
+
+    chmod 0644 /etc/ssh/sshd_config
+fi
+
+chown root:root /data/ssh/*
+chmod 0700 /data/ssh
+chmod 0600 /data/ssh/*