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nginx_version_sha256

#!/usr/bin/env ruby
#  Phusion Passenger - https://www.phusionpassenger.com/
#  Copyright (c) 2024-2025 Asynchronous B.V.
#
#  "Passenger", "Phusion Passenger" and "Union Station" are registered
#  trademarks of Asynchronous B.V.
#
#  Permission is hereby granted, free of charge, to any person obtaining a copy
#  of this software and associated documentation files (the "Software"), to deal
#  in the Software without restriction, including without limitation the rights
#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#  copies of the Software, and to permit persons to whom the Software is
#  furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included in
#  all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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#  THE SOFTWARE.

require 'openssl'
require 'open-uri'
require 'gpgme'
require 'rubygems/version.rb'

VERSION = ARGV[0]
debug = !ENV["VERBOSE"].nil?
if Gem::Version.new(VERSION).segments[1].odd?
  puts "Only use LTS Nginx versions (even numbered minor versions, eg: 1.26.3)"
  exit 1
end
DL_URL = "https://nginx.org/download/nginx-#{VERSION}.tar.gz"
SIG_URL = "#{DL_URL}.asc"
KEY_URLS = [
  # https://nginx.org/en/pgp_keys.html
  "https://nginx.org/keys/nginx_signing.key",
  "https://nginx.org/keys/thresh.key",
  "https://nginx.org/keys/sb.key",
  "https://nginx.org/keys/pluknet.key",
  "https://nginx.org/keys/arut.key",
  "https://nginx.org/keys/maxim.key",
]

puts DL_URL if debug
data = URI.open(DL_URL) do |f| f.read end
File.write("./dl.tar.gz",data) if debug
puts SIG_URL if debug
sig = URI.open(SIG_URL) do |f| f.read end

KEY_URLS.each do |key_url|
  puts key_url if debug
  key = URI.open(key_url) do |f| f.read end
  GPGME::Key.import(key) #only needed if the key has not been imported previously
end

crypto = GPGME::Crypto.new
valid = false
crypto.verify(sig, signed_text: data) do |signature|
  valid = signature.valid?
end

if valid
  puts Digest::SHA256.hexdigest(data)
else
  puts "invalid sig, maybe you need to add a new key to the list?"
  exit 1
end

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