initial commit

client/Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine:3.16
+
+RUN apk --no-cache add openrc openssh bash && \
+    ssh-keygen -A && \
+    mkdir -p /run/openrc && \
+    touch /run/openrc/softlevel
+
+COPY scripts /opt/scripts
+RUN chmod 700 /opt/scripts
+
+ENTRYPOINT ["/opt/scripts/setup.sh"]

client/scripts/setup.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+TEAM_NUM=${TEAM_NUM:=10}
+
+for (( i=1; i<=TEAM_NUM; i++ )); do
+  echo "Creating Team ${i}"
+  adduser -D "team${i}"
+  chmod 750 "/home/team${i}"
+  PASSWORD="TEAM${i}_PASSWORD"
+  if [[ -z "${!PASSWORD}" ]]; then
+    PASSWORD=$(head -c10 </dev/urandom | base64)
+  else
+    PASSWORD=${!PASSWORD}
+  fi
+  echo -e "Password: ${PASSWORD}\n"
+  echo -e "${PASSWORD}\n${PASSWORD}" | passwd "team${i}"
+  unset PASSWORD
+done
+
+if [[ -n "${SSHD_CHALLENGE_DIR}" ]]; then
+  sed -i "s|^AuthorizedKeysFile.*|AuthorizedKeysFile ${SSHD_CHALLENGE_DIR}|" /etc/ssh/sshd_config
+fi
+
+/usr/sbin/sshd -D
+