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#!/bin/sh
# This script generates a simple SAN CSR to be used with Let's Encrypt
# CA. Mostly intended for "auth --csr" testing, but, since it's easily
# auditable, feel free to adjust it and use it on your production web
# server.
if [ "$#" -lt 1 ]
then
echo "Usage: $0 domain [domain...]" >&2
exit 1
fi
domains="DNS:$1"
shift
for x in "$@"
do
domains="$domains,DNS:$x"
done
SAN="$domains" openssl req -config "${OPENSSL_CNF:-openssl.cnf}" \
-new -nodes -subj '/' -reqexts san \
-out "${CSR_PATH:-csr.der}" \
-keyout "${KEY_PATH:-key.pem}" \
-newkey rsa:2048 \
-outform DER
# 512 or 1024 too low for Boulder, 2048 is smallest for tests
echo "You can now run: certbot auth --csr ${CSR_PATH:-csr.der}"