From 7def25b621fb3c090599d4d89d9ff98ba7bd413a Mon Sep 17 00:00:00 2001
From: Knut Ahlers <knut@ahlers.me>
Date: Thu, 8 Feb 2018 13:57:29 +0100
Subject: [PATCH] Port to alpine as a base container

Signed-off-by: Knut Ahlers <knut@ahlers.me>
---
 Dockerfile | 17 ++++++++---------
 start.sh   |  3 ++-
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index ab9de06..5bfd397 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,20 +1,19 @@
-FROM ubuntu:14.04
-MAINTAINER Knut Ahlers <knut@ahlers.me>
+FROM alpine
+
+LABEL maintainer Knut Ahlers <knut@ahlers.me>
 
 ENV USER share
 ENV PASS changeme
 ENV USER_UID 1000
 
-ENV DI_VERSION 1.0.1
-ENV DI_HASH 91b9970e6a0d23d7aedf3321fb1d161937e7f5e6ff38c51a8a997278cc00fb0a
+ENV DI_VERSION 1.2.1
 
-ADD https://github.com/Yelp/dumb-init/releases/download/v1.0.1/dumb-init_${DI_VERSION}_amd64 /usr/local/bin/dumb-init
 
-RUN apt-get update \
- && apt-get install -y openssh-server mcrypt \
+RUN apk --no-cache add bash curl openssh-server openssl shadow \
  && mkdir /var/run/sshd && chmod 0755 /var/run/sshd \
- && echo "${DI_HASH}  /usr/local/bin/dumb-init" | sha256sum -c \
- && chmod +x /usr/local/bin/dumb-init
+ && curl -sSfLo /usr/local/bin/dumb-init https://github.com/Yelp/dumb-init/releases/download/v${DI_VERSION}/dumb-init_${DI_VERSION}_amd64 \
+ && chmod +x /usr/local/bin/dumb-init \
+ && apk --no-cache del curl
 
 ADD start.sh /usr/local/bin/start.sh
 ADD sshd_config /etc/ssh/sshd_config
diff --git a/start.sh b/start.sh
index 76c6e2a..ecacd67 100755
--- a/start.sh
+++ b/start.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -euo pipefail
 
 for type in rsa dsa ecdsa ed25519; do
   if ! [ -e "/ssh/ssh_host_${type}_key" ]; then
@@ -13,7 +14,7 @@ if ( id ${USER} ); then
     echo "INFO: User ${USER} already exists"
 else
     echo "INFO: User ${USER} does not exists, we create it"
-    ENC_PASS=$(perl -e 'print crypt($ARGV[0], "password")' ${PASS})
+    ENC_PASS=$(echo ${PASS} | openssl passwd -1 -stdin)
     useradd -d /data -m -p ${ENC_PASS} -u ${USER_UID} -s /bin/sh ${USER}
 fi