mirror of
https://github.com/nginx-proxy/nginx-proxy
synced 2024-05-07 16:16:09 +02:00
ac066a73e4
- While the anonymous VOLUME can be dropped from Dockerfile, the path needs to be valid at run-time, might as well ensure it's available by creating the dhparam folder at build. - Generation logic no longer necessary, dropped. - Standardized RFC 7919 groups added (2048, 3072, 4096), with 4096-bit remaining the default size. The DH logic can live in the entrypoint script as well. - Third-party supplied pre-generated DH params removed as they're not considered trustworthy compared to RFC 7919 groups.
70 lines
2.5 KiB
Bash
Executable File
70 lines
2.5 KiB
Bash
Executable File
#!/bin/bash
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set -e
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function _setup_dhparam() {
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echo 'Setting up DH Parameters..'
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# DH params will be supplied for nginx here:
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DHPARAM_FILE='/etc/nginx/dhparam/dhparam.pem'
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# DH params may be provided by the user (rarely necessary),
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# or use an existing pre-generated group from RFC7919, defaulting to 4096-bit:
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if [[ -f ${DHPARAM_FILE} ]]
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then
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echo 'Warning: A custom dhparam.pem file was provided. Best practice is to use standardized RFC7919 DHE groups instead.' >&2
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else
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# ENV DHPARAM_BITS - Defines which RFC7919 DHE group to use (default: 4096-bit):
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local FFDHE_GROUP="${DHPARAM_BITS:-4096}"
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# RFC7919 groups are defined here:
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# https://datatracker.ietf.org/doc/html/rfc7919#appendix-A
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local RFC7919_DHPARAM_FILE="/app/dhparam/ffdhe${FFDHE_GROUP}.pem"
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# Only the following pre-generated sizes are supported,
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# emit an error and kill the container if provided an invalid value:
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if [[ ! ${DHPARAM_BITS} =~ ^(2048|3072|4096)$ ]]
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then
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echo "ERROR: Unsupported DHPARAM_BITS size: ${DHPARAM_BITS}, use 2048, 3072, or 4096 (default)." >&2
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exit 1
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fi
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# Provide the DH params file to nginx:
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cp "${RFC7919_DHPARAM_FILE}" "${DHPARAM_FILE}"
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fi
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}
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# Warn if the DOCKER_HOST socket does not exist
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if [[ $DOCKER_HOST = unix://* ]]; then
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socket_file=${DOCKER_HOST#unix://}
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if ! [ -S "$socket_file" ]; then
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cat >&2 <<-EOT
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ERROR: you need to share your Docker host socket with a volume at $socket_file
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Typically you should run your nginxproxy/nginx-proxy with: \`-v /var/run/docker.sock:$socket_file:ro\`
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See the documentation at http://git.io/vZaGJ
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EOT
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socketMissing=1
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fi
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fi
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_setup_dhparam
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# Compute the DNS resolvers for use in the templates - if the IP contains ":", it's IPv6 and must be enclosed in []
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RESOLVERS=$(awk '$1 == "nameserver" {print ($2 ~ ":")? "["$2"]": $2}' ORS=' ' /etc/resolv.conf | sed 's/ *$//g'); export RESOLVERS
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SCOPED_IPV6_REGEX="\[fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}\]"
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if [ "$RESOLVERS" = "" ]; then
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echo "Warning: unable to determine DNS resolvers for nginx" >&2
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unset RESOLVERS
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elif [[ $RESOLVERS =~ $SCOPED_IPV6_REGEX ]]; then
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echo -n "Warning: Scoped IPv6 addresses removed from resolvers: " >&2
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echo "$RESOLVERS" | grep -Eo "$SCOPED_IPV6_REGEX" | paste -s -d ' ' >&2
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RESOLVERS=$(echo "$RESOLVERS" | sed -r "s/$SCOPED_IPV6_REGEX//g" | xargs echo -n); export RESOLVERS
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fi
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# If the user has run the default command and the socket doesn't exist, fail
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if [ "$socketMissing" = 1 ] && [ "$1" = forego ] && [ "$2" = start ] && [ "$3" = '-r' ]; then
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exit 1
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fi
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exec "$@"
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