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#!/bin/sh
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# This file is part of Haketilo
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#
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# Copyright (C) 2021, Wojtek Kosior
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the CC0 1.0 Universal License as published by
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# the Creative Commons Corporation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# CC0 1.0 Universal License for more details.
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set -e
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_PROG_NAME="$0"
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OPERATION="$1"
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API_KEY="$2"
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SECRET="$3"
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XPI_PATH="$4"
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escape_regex_special() {
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printf %s "$1" | sed 's/\([]\.*[-]\)/\\\1/g'
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}
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# Note: We don't actually parse JSON. We extract needed keys with sed regexes
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# which does not work in the general case but is sufficient for now.
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_get_json_key() {
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local KEY_REG="$(escape_regex_special "$1")"
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printf %s "$2" |
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awk '{printf "%s", $0}' |
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sed 's/^.*\("'"$KEY_REG"'"[[:space:]]*:[[:space:]]*"\([^"]*\)"\).*$/\2/'
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}
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get_json_key() {
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local JSON="$2"
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local VALUE="$(_get_json_key "$@")"
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if [ "x$VALUE" != "x$JSON" ]; then
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printf %s "$VALUE"
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fi
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}
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base64url() {
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printf %s "$1" | base64 -w 0 | tr '/+' '_-' | tr -d '='
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}
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sha256hmac() {
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base64url "$(printf %s "$2" | openssl dgst -sha256 -hmac "$1" -binary -)"
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}
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get_manifest_key() {
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get_json_key "$1" "$(unzip -p "$2" manifest.json)"
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}
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generate_jwt() {
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local JWT_HEAD='{"alg":"HS256", "typ":"JWT"}'
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local JWT_ID=$(dd if=/dev/random bs=21 count=1 2>/dev/null | base64)
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local ISSUED_AT_TIME=$(date -u +%s)
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local EXPIRATION_TIME=$((ISSUED_AT_TIME + 300))
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local JWT_PAYLOAD="$(cat <<EOF
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{
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"iss": "$API_KEY",
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"jti": "$JWT_ID",
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"iat": $ISSUED_AT_TIME,
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"exp": $EXPIRATION_TIME
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}
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EOF
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)"
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local JWT_MESSAGE=$(base64url "$JWT_HEAD").$(base64url "$JWT_PAYLOAD")
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local JWT_SIGNATURE=$(sha256hmac "$SECRET" "$JWT_MESSAGE")
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local JWT=$JWT_MESSAGE.$JWT_SIGNATURE
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printf "Using JWT: $JWT\n" >&2
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printf $JWT
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}
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get_extension_url() {
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EXTENSION_ID="$(get_manifest_key id "$XPI_PATH")"
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EXTENSION_VER="$(get_manifest_key version "$XPI_PATH")"
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if [ -z "$EXTENSION_ID" -o -z "$EXTENSION_VER" ]; then
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printf "Couldn't extract extension id and version. Please check if %s contains proper manifest.json file.\n" \
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"$XPI_PATH" >&2
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exit 1
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fi
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printf 'https://addons.mozilla.org/api/v4/addons/%s/versions/%s/' \
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"$EXTENSION_ID" "$EXTENSION_VER"
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}
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print_usage() {
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printf 'Usage: %s upload|check|test API_KEY SECRET XPI_PATH\n' \
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"$_PROG_NAME" >&2
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}
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if [ $# != 4 ]; then
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print_usage
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exit 1
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fi
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unset RETURNED_DATA
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case "$OPERATION" in
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test)
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curl "https://addons.mozilla.org/api/v4/accounts/profile/" \
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-g -H "Authorization: JWT $(generate_jwt)"
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printf '\n'
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;;
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check)
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RETURNED_DATA="$(curl $(get_extension_url) \
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-g -H "Authorization: JWT $(generate_jwt)")"
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;;
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upload)
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RETURNED_DATA="$(curl $(get_extension_url) \
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-g -XPUT --form "upload=@$XPI_PATH" \
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-H "Authorization: JWT $(generate_jwt)")"
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;;
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*)
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print_usage
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exit 1
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;;
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esac
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if [ -n "$RETURNED_DATA" ]; then
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printf "addons.mozilla.org says:\n%s\n" "$RETURNED_DATA"
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DOWNLOAD_URL="$(get_json_key download_url "$RETURNED_DATA")"
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if [ -n "$DOWNLOAD_URL" ]; then
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printf "Downloading extension file from %s\n" "$DOWNLOAD_URL"
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curl "$DOWNLOAD_URL" -g -H "Authorization: JWT $(generate_jwt)" -O
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fi
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fi
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