mirror of
https://github.com/thib8956/nginx-proxy
synced 2024-11-21 11:26:31 +00:00
53 lines
1.9 KiB
Bash
Executable File
53 lines
1.9 KiB
Bash
Executable File
#!/bin/bash -e
|
|
|
|
# The first argument is the bit depth of the dhparam, or 2048 if unspecified
|
|
DHPARAM_BITS=${1:-2048}
|
|
GENERATE_DHPARAM=${2:-true}
|
|
|
|
# If a dhparam file is not available, use the pre-generated one and generate a new one in the background.
|
|
# Note that /etc/nginx/dhparam is a volume, so this dhparam will persist restarts.
|
|
PREGEN_DHPARAM_FILE="/app/dhparam.pem.default"
|
|
DHPARAM_FILE="/etc/nginx/dhparam/dhparam.pem"
|
|
GEN_LOCKFILE="/tmp/dhparam_generating.lock"
|
|
|
|
# The hash of the pregenerated dhparam file is used to check if the pregen dhparam is already in use
|
|
PREGEN_HASH=$(md5sum $PREGEN_DHPARAM_FILE | cut -d" " -f1)
|
|
if [[ -f $DHPARAM_FILE ]]; then
|
|
CURRENT_HASH=$(md5sum $DHPARAM_FILE | cut -d" " -f1)
|
|
if [[ $PREGEN_HASH != $CURRENT_HASH ]]; then
|
|
# There is already a dhparam, and it's not the default
|
|
echo "Custom dhparam.pem file found, generation skipped"
|
|
exit 0
|
|
fi
|
|
|
|
if [[ -f $GEN_LOCKFILE ]]; then
|
|
# Generation is already in progress
|
|
exit 0
|
|
fi
|
|
fi
|
|
|
|
if [[ $GENERATE_DHPARAM =~ ^[Ff][Aa][Ll][Ss][Ee]$ ]]; then
|
|
echo "Skipping Diffie-Hellman parameters generation and Ignoring pre-generated dhparam.pem"
|
|
exit 0
|
|
fi
|
|
|
|
cat >&2 <<-EOT
|
|
WARNING: $DHPARAM_FILE was not found. A pre-generated dhparam.pem will be used for now while a new one
|
|
is being generated in the background. Once the new dhparam.pem is in place, nginx will be reloaded.
|
|
EOT
|
|
|
|
# Put the default dhparam file in place so we can start immediately
|
|
cp $PREGEN_DHPARAM_FILE $DHPARAM_FILE
|
|
touch $GEN_LOCKFILE
|
|
|
|
# Generate a new dhparam in the background in a low priority and reload nginx when finished (grep removes the progress indicator).
|
|
(
|
|
(
|
|
nice -n +5 openssl dhparam -out $DHPARAM_FILE.tmp $DHPARAM_BITS 2>&1 \
|
|
&& mv $DHPARAM_FILE.tmp $DHPARAM_FILE \
|
|
&& echo "dhparam generation complete, reloading nginx" \
|
|
&& nginx -s reload
|
|
) | grep -vE '^[\.+]+'
|
|
rm $GEN_LOCKFILE
|
|
) &disown
|