From 4346263cd5270ff97360e13af1218f6aa14f38ea Mon Sep 17 00:00:00 2001 From: Sean Kelly Date: Thu, 19 Oct 2023 08:59:28 -0500 Subject: [PATCH] initial --- LICENSE.md | 195 +++++++++++++++++++++++++++++++++++++ NOTICE.txt | 31 ++++++ README.md | 82 ++++++++++++++++ SECURITY.md | 19 ++++ docker/Dockerfile | 85 ++++++++++++++++ docker/entrypoint.sh | 51 ++++++++++ etc/default.conf.template | 83 ++++++++++++++++ etc/nginx.conf | 61 ++++++++++++ proxycrypt.sublime-project | 21 ++++ 9 files changed, 628 insertions(+) create mode 100644 LICENSE.md create mode 100644 NOTICE.txt create mode 100644 README.md create mode 100644 SECURITY.md create mode 100644 docker/Dockerfile create mode 100755 docker/entrypoint.sh create mode 100644 etc/default.conf.template create mode 100644 etc/nginx.conf create mode 100644 proxycrypt.sublime-project diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..f5f4b8b --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,195 @@ +Apache License +============== + +_Version 2.0, January 2004_ +_<>_ + +### Terms and Conditions for use, reproduction, and distribution + +#### 1. 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IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. diff --git a/README.md b/README.md new file mode 100644 index 0000000..6bcfbd0 --- /dev/null +++ b/README.md @@ -0,0 +1,82 @@ +# 🕵️‍♀️ ProxyCrypt + +ProxyCrypt is a lightweight HTTPS wrapper for a non-encrypted reversed-proxy with a random self-signed encryption certificate key. It acts as an SSL/TLS termination for upstream services, relieving them of the computational requirements of encryption (not to mention the woeful practice of including keystores in their Docker images). + +This [fork from the original](https://github.com/NASA-PDS/proxycrypt) adds support for serving static assets and multimedia for [Django](https://www.djangoproject.com)- and [Wagtail](https://wagtail.org)-based applications. + +ProxyCrypt itself does not include a certificate or keystore. Instead, it generates a random self-signed certificate on each startup. This means: + +- Better separation of concerns: application containers and processes can focus on their applications, not on encryption. +- A single TLS stack can be presented to an outside composition or swarm, enabling tighter focus on vulnerabilities instead of chasing them around multiple implementations in multiple containers/processes. +- Private keystores shouldn't appear in images in public image/container registries since anyone can grab a copy and masquerade as your own service. + - Generating and storing keystores at image build time also doesn't give a good way to support certificate revocation. +- This approach should also satisfy the JPL requirement of having at least self-signed certificates on all host-accessible services + - And at JPL, this requirement extends to `localhost`¹! + +It's powered by [Nginx](https://nginx.org/) and [Alpine](https://www.alpinelinux.org/), which is why ProxyCrypt is so lightweight 🪶. + + +## 🏃‍♀️ Building and Running + +To build the ProxyCrypt image, run: + + docker image build --tag edrndocker/proxycrypt --file docker/Dockerfile . + +To run it, put it in your Docker Composition/Swarm/etc., and set these environment variables as needed: + +| Variable | Use | Default | +|:-----------------|:------------------------------------------------------------------------|:-------------------| +| `PROXY_URL` | Upstream service in the composition/swarm/etc. | (unset, required) | +| `PROXY_PATH` | URL path from which the service should be called, e.g. /exposed-path/³ | (unset, required) | +| `PROXY_PORT` | port used by the proxy, as seen by the user | (unset, required) | +| `CERT_CN` | Common name for the random certificate, such as `www.myservice.io` | `localhost` | +| `CERT_DAYS` | How many days before the random certificate expires | `365` | +| `PROXY_REDIRECT` | How to rewrite Location and Refresh headers if necessary | (unset, required)² | + +You should also map these two filesystem locations as volumes: + +- The Wagtail `media` directory to `/app/media` +- The Django `static` directory to `/app/static` + +You can run it locally for testing purposes. Suppose you've got a non-SSL service on TCP port, say, 9200 on your rig. You can run: + + docker container run --env PROXY_URL=http://host.docker.internal:9200/ --env PROXY_PATH=/exposed-path/ --publish 8888:443 --volume ${HOME}/Desktop:/app/static --volume ${HOME}/Downloads:/app/media --rm edrndocker/proxycrypt --detach + +and get an `https` version of that service on port 8888: + + curl --insecure https://localhost:8888/exposed-path + +You'll need the `--insecure` (or its equivalent in other applications) since it's a self-signed key. You can also try to access your Desktop files as "static" assets: + + curl --insecure https://localhost:8888/exposed-path/static/some-file + +and your Downloads directory as "media" files: + + curl --insecure https://localhost:8888/exposed-path/media/some-other-file + + +## 👥 Contributing + +Within the Early Detection Research Network, we value the health of our community as much as the code. Towards that end, we ask that you read and practice what's described in these documents: + +- Our [contributor's guide](https://github.com/EDRN/.github/blob/main/CONTRIBUTING.md) delineates the kinds of contributions we accept. +- Our [code of conduct](https://github.com/EDRN/.github/blob/main/CODE_OF_CONDUCT.md) outlines the standards of behavior we practice and expect by everyone who participates with our software. + + +### 🔢 Versioning + +We use the [SemVer](https://semver.org/) philosophy for versioning this software. + + +## 📃 License + +The project is licensed under the [Apache version 2](LICENSE.md) license. + + +## 👣 Footnotes + +¹Just wait: they're going to demand TLS on Unix Domain Sockets next! 😝 + +²See the [Nginx documentation on `proxy_redirect`](https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_redirect) for more information. Unsure where to start? Try using the word `default`. + +³This must end in a `/`. If you want to match just the root URI, then use a single `/` diff --git a/SECURITY.md b/SECURITY.md new file mode 100644 index 0000000..6e661d9 --- /dev/null +++ b/SECURITY.md @@ -0,0 +1,19 @@ +# 👮‍♀️ Security Policy + +This document describes the security policy of ProxyCrypt. + + +## 📀 Supported Versions + +The following versions are supported and/or unsupported at this time: + +| Version | Supported | +|:--------|:---------:| +| 1.0+ | ✅ | +| <1.0 | ❌ | + + +## 🚨 Reporting a Vulnerability + +To report a vulnerability, [please contact us by email](mailto:edrn-ic@jpl.nasa.gov). Sadly, we aren't equipped for encryption. + diff --git a/docker/Dockerfile b/docker/Dockerfile new file mode 100644 index 0000000..ebb4f9e --- /dev/null +++ b/docker/Dockerfile @@ -0,0 +1,85 @@ +# 🕵️‍♀️ ProxyCrypt +# ============= +# +# Simple image based on Nginx and Alpine: ProxyCrypt adds OpenSSL and some custom configuration. +# +# Copyright © 2023, California Institute of Technology ("Caltech"). +# U.S. Government sponsorship acknowledged. +# +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are met: +# +# • Redistributions of source code must retain the above copyright notice, +# this list of conditions and the following disclaimer. +# • Redistributions must reproduce the above copyright notice, this list of +# conditions and the following disclaimer in the documentation and/or other +# materials provided with the distribution. +# • Neither the name of Caltech nor its operating division, the Jet Propulsion +# Laboratory, nor the names of its contributors may be used to endorse or +# promote products derived from this software without specific prior written +# permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. + +FROM nginx:1.23.3-alpine + + +# Default env vars +# ---------------- +# +# - CERT_CN: "common name" to use in the random certificate's subject +# - PROXY_REDIRECT: How Nginx should rewrite "Location" and "Refresh" headers +# +# Other variables used but not listed here: +# +# - CERT_DAYS: How long the random certificate is good for; defaults to 365 +# - PROXY_URL: Where to send upstream requests; this is **required** +# - PROXY_PATH: Path exposed on the proxy, from which to call the service; this is **required** and must end in `/` + +ENV CERT_CN=localhost +ENV PROXY_REDIRECT=default + + +# Image construction +# ------------------ +# +# Just add OpenSSL, Nginx config, and our custom entrypoint. + +RUN : &&\ + /sbin/apk update --quiet &&\ + /sbin/apk add --no-progress --quiet openssl &&\ + /bin/rm -rf /var/cache/apk/* &&\ + : +COPY etc/nginx.conf /etc/nginx/ +COPY etc/default.conf.template /etc/nginx/templates/ +COPY docker/entrypoint.sh / + + +# Entrypoint +# ---------- +# +# Speaking of that custom entrypoint… + +ENTRYPOINT ["/entrypoint.sh"] +CMD ["nginx", "-g", "daemon off;"] + + +# Metadata +# -------- + +EXPOSE 443 +LABEL "org.label-schema.name"="ProxyCrypt" +LABEL "org.label-schema.description"="SSL/TLS termination for upstream services" +LABEL "org.label-schema.version"="1.0.0" diff --git a/docker/entrypoint.sh b/docker/entrypoint.sh new file mode 100755 index 0000000..b27d252 --- /dev/null +++ b/docker/entrypoint.sh @@ -0,0 +1,51 @@ +#!/bin/sh -e +# +# 🕵️‍♀️ ProxyCrypt entrypoint — This is invoked at container startup. +# +# Copyright © 2023, California Institute of Technology ("Caltech"). +# U.S. Government sponsorship acknowledged. +# +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are met: +# +# • Redistributions of source code must retain the above copyright notice, +# this list of conditions and the following disclaimer. +# • Redistributions must reproduce the above copyright notice, this list of +# conditions and the following disclaimer in the documentation and/or other +# materials provided with the distribution. +# • Neither the name of Caltech nor its operating division, the Jet Propulsion +# Laboratory, nor the names of its contributors may be used to endorse or +# promote products derived from this software without specific prior written +# permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +# Check essential env vars: +: ${PROXY_URL:?✋ The environment variable PROXY_URL is required} + +# "Reasonable" defaults: +CERT_CN=${CERT_CN:-localhost} +CERT_DAYS=${CERT_DAYS:-365} + +echo "💁‍♀️ The CERT_CN is ${CERT_CN}" 1>&2 + +# Make a random self-signed certificate +/bin/rm -f /etc/ssl/self.key /etc/ssl/self.cert +/usr/bin/openssl req -nodes -x509 -days ${CERT_DAYS} -newkey rsa:2048 \ + -keyout /etc/ssl/self.key -out /etc/ssl/self.cert \ + -subj "/C=US/ST=California/L=Pasadena/O=Caltech/CN=${CERT_CN}" + +# Turn things over to Nginx +exec /docker-entrypoint.sh "$@" diff --git a/etc/default.conf.template b/etc/default.conf.template new file mode 100644 index 0000000..e4330f6 --- /dev/null +++ b/etc/default.conf.template @@ -0,0 +1,83 @@ +# 🕵️‍♀️ ProxyCrypt +# ============= +# +# Nginx default server configuration. +# +# Copyright © 2023, California Institute of Technology ("Caltech"). +# U.S. Government sponsorship acknowledged. +# +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are met: +# +# • Redistributions of source code must retain the above copyright notice, +# this list of conditions and the following disclaimer. +# • Redistributions must reproduce the above copyright notice, this list of +# conditions and the following disclaimer in the documentation and/or other +# materials provided with the distribution. +# • Neither the name of Caltech nor its operating division, the Jet Propulsion +# Laboratory, nor the names of its contributors may be used to endorse or +# promote products derived from this software without specific prior written +# permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +# Note that environment variables are interpolated into this file at container start. + +server { + listen 443 ssl; + listen [::]:443 ssl; + server_name localhost; + ssl_certificate /etc/ssl/self.cert; + ssl_certificate_key /etc/ssl/self.key; + ssl_protocols TLSv1 TLSv1.1 TLSv1.2; + ssl_ciphers HIGH:!aNULL:!MD5; + ssl_session_cache shared:SSL:512k; + ssl_session_timeout 5m; + + # Static assets; PROXY_PATH must end in `/` + location ${PROXY_PATH}static/ { + alias /app/static/; + } + + # Media; PROXY_PATH must end in `/` + location ${PROXY_PATH}media/ { + alias /app/media/; + } + + # Reverse-proxy + location ${PROXY_PATH} { + proxy_pass ${PROXY_URL}; + proxy_redirect ${PROXY_REDIRECT}; + proxy_set_header Host $http_host; + proxy_set_header Origin http://$http_host; + proxy_set_header X-Forwarded-Prefix ${PROXY_PATH}; + proxy_set_header X-Forwarded-Port ${PROXY_PORT}; + proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; + proxy_set_header X-Forwarded-Proto $scheme; + proxy_set_header X-Real-IP $remote_addr; + # Disclosure reduction + proxy_hide_header X-Powered-By; + proxy_ssl_verify off; + } + + # Use Nginx's own error pages to save time + error_page 500 502 503 504 /50x.html; + location = /50x.html { + root /usr/share/nginx/html; + } +} + +# -*- mode: nginx; tab-width: 4; -*- + diff --git a/etc/nginx.conf b/etc/nginx.conf new file mode 100644 index 0000000..2d6c767 --- /dev/null +++ b/etc/nginx.conf @@ -0,0 +1,61 @@ +# 🕵️‍♀️ ProxyCrypt +# ============= +# +# Nginx main configuration. +# +# Copyright © 2023, California Institute of Technology ("Caltech"). +# U.S. Government sponsorship acknowledged. +# +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are met: +# +# • Redistributions of source code must retain the above copyright notice, +# this list of conditions and the following disclaimer. +# • Redistributions must reproduce the above copyright notice, this list of +# conditions and the following disclaimer in the documentation and/or other +# materials provided with the distribution. +# • Neither the name of Caltech nor its operating division, the Jet Propulsion +# Laboratory, nor the names of its contributors may be used to endorse or +# promote products derived from this software without specific prior written +# permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +# Note that no environment variables are interpolated into this file. + +user nginx; +worker_processes auto; +error_log /var/log/nginx/error.log notice; +pid /var/run/nginx.pid; + +events { + worker_connections 512; +} + +http { + include /etc/nginx/mime.types; + default_type application/octet-stream; + sendfile on; + keepalive_timeout 60; + server_tokens off; + + log_format main 'ProxyCrypt $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent ' + '"$http_referer" "$http_user_agent" "$http_x_forwarded_for"'; + + access_log /var/log/nginx/access.log main; + include /etc/nginx/conf.d/*.conf; +} + +# -*- mode: nginx; tab-width: 4; -*- diff --git a/proxycrypt.sublime-project b/proxycrypt.sublime-project new file mode 100644 index 0000000..2e9f0b4 --- /dev/null +++ b/proxycrypt.sublime-project @@ -0,0 +1,21 @@ +{ + "folders" : [ + { + "file_exclude_patterns" : [ + "*.sublime-*", + "*.py[cod]", + ".DS_Store" + ], + "folder_exclude_patterns" : [ + ".idle", + "bin", + "dist", + "build", + "*.egg-info", + "__pycache__", + "venv" + ], + "path" : "." + } + ] +}