Initial release (previous work was in resolve.rs)

.editorconfig

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+# EditorConfig is awesome: http://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = tab
+insert_final_newline = true
+tab_width = 4
+trim_trailing_whitespace = true
+
+[*.json]
+indent_size = 2
+
+[*.yaml]
+indent_size = 2

.github/workflows/release.yaml

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+name: Release
+
+on:
+  schedule:
+  - cron: '42 0 * * 1'
+  workflow_dispatch:
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+
+      - name: Get and encrypt Maxmind databases
+        run: bin/update_maxmind.sh
+        env:
+          MMDB_ENCRYPTION_KEY: ${{ secrets.MMDB_ENCRYPTION_KEY }}
+          MAXMIND_LICENSE_KEY: ${{ secrets.MAXMIND_LICENSE_KEY }}
+
+      - name: Set release info
+        run: |
+          echo "RELEASE_DATE=$(date -u +%Y-%m-%dT%H:%M:%SZ)" >> $GITHUB_ENV
+          echo "RELEASE_TAG=$(date -u +%Y%m%d-%H%M%S)" >> $GITHUB_ENV
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            build/GeoLite2-ASN.mmdb.enc
+            build/GeoLite2-City.mmdb.enc
+            build/mmdb.iv
+            build/mmdb.md5
+          tag_name: ${{ env.RELEASE_TAG }}
+          name: Release ${{ env.RELEASE_DATE }}
+          body: |
+            Automatically created on ${{ env.RELEASE_DATE }}
+          draft: false
+          prerelease: false

.gitignore

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+build/
+*.crt
+dist/
+.DS_Store
+*.env
+.idea/
+*.key
+*.log
+*.mmdb
+tmp/
+*.tmp

README.md

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+# MaxMind for Resolve.rs [<img alt="Resolve.rs Logo" src="https://resolve.rs/favicon.svg" height="96" align="right"/>](https://resolve.rs/)
+
+The MaxMind "Lite" databases are free to use, but you cannot redistribute them, and cannot (reliably) download them every time a server starts.  To get a server to start without hitting MaxMind directly, I use an encrypted version that automatically updates once a week.
+
+## Using
+
+This is just for [resolve.rs](https://resolve.rs), but you can do the same thing with your own fork. You need to set the following Github secrets:
+
+* `MAXMIND_LICENSE_KEY` - from MaxMind
+* `MAXMIND_ACCOUNT_ID` - also from MaxMind
+* `MMDB_ENCRYPTION_KEY` - generate a 32-byte (64 hex digits) encryption key
+
+You will use the `MMDB_ENCRYPTION_KEY` when decrypting the database files on your server.
+
+## License
+
+The script is licensed under the [GNU Affero General Public License v3.0](LICENSE.txt).
+
+This product includes GeoLite2 data created by MaxMind, available from [www.maxmind.com](https://dev.maxmind.com/geoip/geolite2-free-geolocation-data/)
+
+## Release Files
+
+- GeoLite2-ASN.mmdb.enc: encrypted ASN lookup database
+- GeoLite2-City.mmdb.enc: encrypted city lookup database
+- mmdb.iv: initialization vector used for encryption
+- mmdb.md5: md5 hashes of the unencrypted files (to detect updates)
+
+## Credits
+
+[![Bash](https://www.vectorlogo.zone/logos/gnu_bash/gnu_bash-ar21.svg)](https://www.gnu.org/software/bash/ "Scripting")
+[![Git](https://www.vectorlogo.zone/logos/git-scm/git-scm-ar21.svg)](https://git-scm.com/ "Version control")
+[![Github](https://www.vectorlogo.zone/logos/github/github-ar21.svg)](https://github.com/ "Code hosting")
+[![MaxMind](https://www.vectorlogo.zone/logos/maxmind/maxmind-ar21.svg)](https://www.maxmind.com/ "IP geolocation and ASN databases")
+[![OpenSSL](https://www.vectorlogo.zone/logos/openssl/openssl-ar21.svg)](https://www.openssl.org/ "Encryption")

bin/update_maxmind.sh

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+#!/usr/bin/env bash
+#
+# downloads a fresh copy of the MaxMind databases for ASN & geolocation lookups and makes an encrypted release
+#
+
+set -o errexit
+set -o pipefail
+set -o nounset
+
+echo "INFO: starting MaxMind update at $(date -u +%Y-%m-%dT%H:%M:%SZ)"
+
+SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
+REPO_DIR="$(realpath "${SCRIPT_DIR}/..")"
+
+ENV_FILE="$(realpath "${REPO_DIR}/.env")"
+if [ -f "${ENV_FILE}" ]; then
+    echo "INFO: loading ${ENV_FILE} into environment"
+    export $(cat ${ENV_FILE})
+fi
+
+TAR=tar
+if [[ $OSTYPE == 'darwin'* ]]; then
+    echo "INFO: running on MacOS so using gtar instead of tar"
+    TAR=gtar
+fi
+
+BUILD_DIR="$(realpath "${REPO_DIR}/build")"
+if [ ! -d "${BUILD_DIR}" ]; then
+    echo "INFO: creating build directory ${BUILD_DIR}"
+    mkdir -p "${BUILD_DIR}"
+else
+    echo "INFO: using existing build directory ${BUILD_DIR}"
+fi
+
+TMP_ASN_FILE=$(mktemp)
+echo "INFO: download MaxMind ASN database into ${TMP_ASN_FILE}"
+curl --silent "https://download.maxmind.com/app/geoip_download?edition_id=GeoLite2-ASN&suffix=tar.gz&license_key=${MAXMIND_LICENSE_KEY}" >"${TMP_ASN_FILE}"
+${TAR} -xzf ${TMP_ASN_FILE} --directory="${BUILD_DIR}" --wildcards --strip-components 1 "*.mmdb"
+rm "${TMP_ASN_FILE}"
+
+TMP_CITY_FILE=$(mktemp)
+echo "INFO: download MaxMind City database into ${TMP_CITY_FILE}"
+curl --silent "https://download.maxmind.com/app/geoip_download?edition_id=GeoLite2-City&suffix=tar.gz&license_key=${MAXMIND_LICENSE_KEY}" >"${TMP_CITY_FILE}"
+${TAR} -xzf ${TMP_CITY_FILE} --directory="${BUILD_DIR}" --wildcards --strip-components 1 "*.mmdb"
+rm "${TMP_CITY_FILE}"
+
+md5sum ${BUILD_DIR}/*.mmdb | sort >${BUILD_DIR}/mmdb.md5
+
+#LATER: curl release/download/latest/mmdb.md5
+#DIFF=$(git diff --name-only "${BUILD_DIR}/mmdb.md5")
+#
+#if [ "${DIFF}" == "" ]; then
+#    echo "INFO: no changes, exiting at $(date -u +%Y-%m-%dT%H:%M:%SZ)"
+#    exit 0
+#fi
+
+if [ "${MMDB_ENCRYPTION_KEY:-BAD}" = "BAD" ]; then
+    echo "INFO: no encryption keys, exiting.  (but app can still be run locally)"
+    exit 1
+fi
+
+#
+# generate (and save) a new IV every time
+#
+MMDB_ENCRYPTION_IV=$(head -c 16 /dev/urandom | xxd -l 16 -c 16 -p)
+echo -n ${MMDB_ENCRYPTION_IV} > ${BUILD_DIR}/mmdb.iv
+
+ASN_FILE="${BUILD_DIR}/GeoLite2-ASN.mmdb"
+echo "INFO: starting encryption of ${ASN_FILE} (file size=$(du ${ASN_FILE} | cut -f 1))"
+gzip --stdout ${ASN_FILE} | openssl enc -aes-256-ctr \
+	-K ${MMDB_ENCRYPTION_KEY} \
+	-iv ${MMDB_ENCRYPTION_IV} \
+	-out "${ASN_FILE}.enc"
+rm ${ASN_FILE}
+echo "INFO: encryption complete (file size=$(du ${ASN_FILE}.enc | cut -f 1))"
+
+CITY_FILE="${BUILD_DIR}/GeoLite2-City.mmdb"
+echo "INFO: starting encryption of ${CITY_FILE} (file size=$(du ${CITY_FILE} | cut -f 1))"
+gzip --stdout ${CITY_FILE} | openssl enc -aes-256-ctr \
+	-K ${MMDB_ENCRYPTION_KEY} \
+	-iv ${MMDB_ENCRYPTION_IV} \
+	-out "${CITY_FILE}.enc"
+rm ${CITY_FILE}
+echo "INFO: encryption complete (file size=$(du ${CITY_FILE}.enc | cut -f 1))"
+
+echo "INFO: complete MaxMind update at $(date -u +%Y-%m-%dT%H:%M:%SZ)"