Generate OpenSSH pre 7.8 keys for use with Nessus Authenticated Linux Scanning

Dockerfile

FROM alpine:3.8.4

# Run command
# docker run -v ${pwd}:/keys -it keygen

# Do update and install openssh
RUN apk update
RUN apk add openssh

# Create script and folder
RUN mkdir /keys
RUN echo "#!/bin/sh" >> /entrypoint.sh
RUN echo "/usr/bin/ssh-keygen -t rsa -f /keys/id_rsa -q -P ''" >> /entrypoint.sh
RUN echo "echo -------------START PUB KEY-------------" >> /entrypoint.sh
RUN echo "/bin/cat /keys/id_rsa.pub" >> /entrypoint.sh
RUN echo "echo -------------STOP PUB KEY-------------" >> /entrypoint.sh
RUN echo "echo " >> /entrypoint.sh
RUN echo "echo -------------START PRIVATE KEY-------------" >> /entrypoint.sh
RUN echo "/bin/cat /keys/id_rsa" >> /entrypoint.sh
RUN echo "echo -------------STOP PRIVATE KEY-------------" >> /entrypoint.sh

# Change permissions of entrypoint
RUN chmod 755 /entrypoint.sh

# Set entrypoint
ENTRYPOINT ["/entrypoint.sh"]