103 lines
2.7 KiB
Ruby
103 lines
2.7 KiB
Ruby
# encoding: UTF-8
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require 'common/updater/updater'
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# Updater for the Database (currently only 3 .json)
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class DbUpdater < Updater
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# FILENAMES = %w(plugin_vulns theme_vulns wp_vulns)
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FILES = %w(plugin_vulns.json theme_vulns.json wp_vulns.json)
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attr_reader :repo_directory
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def initialize(repo_directory)
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@repo_directory = repo_directory
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fail "#{repo_directory} is not writable" unless \
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Pathname.new(repo_directory).writable?
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end
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# @return [ Hash ] The params for Typhoeus::Request
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def request_params
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{
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ssl_verifyhost: 2,
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ssl_verifypeer: true
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}
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end
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# @return [ String ] The raw file URL associated with the given filename
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def remote_file_url(filename)
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"https://raw.githubusercontent.com/wpscanteam/vulndb/master/#{filename}"
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end
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# @return [ String ] The checksum of the associated remote filename
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def remote_file_checksum(filename)
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url = "#{remote_file_url(filename)}.sha512"
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res = Browser.get(url, request_params)
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fail "Unable to get #{url}" unless res.code == 200
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res.body
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end
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def local_file_path(filename)
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File.join(repo_directory, "#{filename}")
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end
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def local_file_checksum(filename)
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Digest::SHA512.file(local_file_path(filename)).hexdigest
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end
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def backup_file_path(filename)
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File.join(repo_directory, "#{filename}.back")
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end
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def create_backup(filename)
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return unless File.exist?(local_file_path(filename))
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FileUtils.cp(local_file_path(filename), backup_file_path(filename))
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end
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def restore_backup(filename)
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return unless File.exist?(backup_file_path(filename))
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FileUtils.cp(backup_file_path(filename), local_file_path(filename))
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end
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def delete_backup(filename)
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FileUtils.rm(backup_file_path(filename), force: true)
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end
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# @return [ String ] The checksum of the downloaded file
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def download(filename)
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file_path = local_file_path(filename)
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file_url = remote_file_url(filename)
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res = Browser.get(file_url, request_params)
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fail "Error while downloading #{file_url}" unless res.code == 200
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File.write(file_path, res.body.chomp)
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local_file_checksum(filename)
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end
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def update
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FILES.each do |filename|
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begin
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db_checksum = remote_file_checksum(filename)
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# Checking if the file needs to be updated
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next if File.exist?(local_file_path(filename)) &&
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db_checksum == local_file_checksum(filename)
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create_backup(filename)
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dl_checksum = download(filename)
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unless dl_checksum == db_checksum
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fail "#{filename}: checksums do not match"
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end
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rescue => e
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restore_backup(filename)
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raise e
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ensure
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delete_backup(filename)
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end
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end
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end
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end
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