JezK
Edit File: signer.rb
# frozen_string_literal: true ## # Basic OpenSSL-based package signing class. require_relative "../user_interaction" class Gem::Security::Signer include Gem::UserInteraction ## # The chain of certificates for signing including the signing certificate attr_accessor :cert_chain ## # The private key for the signing certificate attr_accessor :key ## # The digest algorithm used to create the signature attr_reader :digest_algorithm ## # The name of the digest algorithm, used to pull digests out of the hash by # name. attr_reader :digest_name # :nodoc: ## # Gem::Security::Signer options attr_reader :options DEFAULT_OPTIONS = { expiration_length_days: 365, }.freeze ## # Attempts to re-sign an expired cert with a given private key def self.re_sign_cert(expired_cert, expired_cert_path, private_key) return unless expired_cert.not_after < Time.now expiry = expired_cert.not_after.strftime('%Y%m%d%H%M%S') expired_cert_file = "#{File.basename(expired_cert_path)}.expired.#{expiry}" new_expired_cert_path = File.join(Gem.user_home, ".gem", expired_cert_file) Gem::Security.write(expired_cert, new_expired_cert_path) re_signed_cert = Gem::Security.re_sign( expired_cert, private_key, (Gem::Security::ONE_DAY * Gem.configuration.cert_expiration_length_days) ) Gem::Security.write(re_signed_cert, expired_cert_path) yield(expired_cert_path, new_expired_cert_path) if block_given? end ## # Creates a new signer with an RSA +key+ or path to a key, and a certificate # +chain+ containing X509 certificates, encoding certificates or paths to # certificates. def initialize(key, cert_chain, passphrase = nil, options = {}) @cert_chain = cert_chain @key = key @passphrase = passphrase @options = DEFAULT_OPTIONS.merge(options) unless @key default_key = File.join Gem.default_key_path @key = default_key if File.exist? default_key end unless @cert_chain default_cert = File.join Gem.default_cert_path @cert_chain = [default_cert] if File.exist? default_cert end @digest_name = Gem::Security::DIGEST_NAME @digest_algorithm = Gem::Security.create_digest(@digest_name) if @key && !@key.is_a?(OpenSSL::PKey::PKey) @key = OpenSSL::PKey.read(File.read(@key), @passphrase) end if @cert_chain @cert_chain = @cert_chain.compact.map do |cert| next cert if OpenSSL::X509::Certificate === cert cert = File.read cert if File.exist? cert OpenSSL::X509::Certificate.new cert end load_cert_chain end end ## # Extracts the full name of +cert+. If the certificate has a subjectAltName # this value is preferred, otherwise the subject is used. def extract_name(cert) # :nodoc: subject_alt_name = cert.extensions.find {|e| 'subjectAltName' == e.oid } if subject_alt_name /\Aemail:/ =~ subject_alt_name.value # rubocop:disable Performance/StartWith $' || subject_alt_name.value else cert.subject end end ## # Loads any missing issuers in the cert chain from the trusted certificates. # # If the issuer does not exist it is ignored as it will be checked later. def load_cert_chain # :nodoc: return if @cert_chain.empty? while @cert_chain.first.issuer.to_s != @cert_chain.first.subject.to_s do issuer = Gem::Security.trust_dir.issuer_of @cert_chain.first break unless issuer # cert chain is verified later @cert_chain.unshift issuer end end ## # Sign data with given digest algorithm def sign(data) return unless @key raise Gem::Security::Exception, 'no certs provided' if @cert_chain.empty? if @cert_chain.length == 1 and @cert_chain.last.not_after < Time.now alert("Your certificate has expired, trying to re-sign it...") re_sign_key( expiration_length: (Gem::Security::ONE_DAY * options[:expiration_length_days]) ) end full_name = extract_name @cert_chain.last Gem::Security::SigningPolicy.verify @cert_chain, @key, {}, {}, full_name @key.sign @digest_algorithm.new, data end ## # Attempts to re-sign the private key if the signing certificate is expired. # # The key will be re-signed if: # * The expired certificate is self-signed # * The expired certificate is saved at ~/.gem/gem-public_cert.pem # and the private key is saved at ~/.gem/gem-private_key.pem # * There is no file matching the expiry date at # ~/.gem/gem-public_cert.pem.expired.%Y%m%d%H%M%S # # If the signing certificate can be re-signed the expired certificate will # be saved as ~/.gem/gem-public_cert.pem.expired.%Y%m%d%H%M%S where the # expiry time (not after) is used for the timestamp. def re_sign_key(expiration_length: Gem::Security::ONE_YEAR) # :nodoc: old_cert = @cert_chain.last disk_cert_path = File.join(Gem.default_cert_path) disk_cert = File.read(disk_cert_path) rescue nil disk_key_path = File.join(Gem.default_key_path) disk_key = OpenSSL::PKey.read(File.read(disk_key_path), @passphrase) rescue nil return unless disk_key if disk_key.to_pem == @key.to_pem && disk_cert == old_cert.to_pem expiry = old_cert.not_after.strftime('%Y%m%d%H%M%S') old_cert_file = "gem-public_cert.pem.expired.#{expiry}" old_cert_path = File.join(Gem.user_home, ".gem", old_cert_file) unless File.exist?(old_cert_path) Gem::Security.write(old_cert, old_cert_path) cert = Gem::Security.re_sign(old_cert, @key, expiration_length) Gem::Security.write(cert, disk_cert_path) alert("Your cert: #{disk_cert_path} has been auto re-signed with the key: #{disk_key_path}") alert("Your expired cert will be located at: #{old_cert_path}") @cert_chain = [cert] end end end end