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cert_command.rb
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# frozen_string_literal: true require_relative "../command" require_relative "../security" class Gem::Commands::CertCommand < Gem::Command def initialize super "cert", "Manage RubyGems certificates and signing settings", add: [], remove: [], list: [], build: [], sign: [] add_option("-a", "--add CERT", "Add a trusted certificate.") do |cert_file, options| options[:add] << open_cert(cert_file) end add_option("-l", "--list [FILTER]", "List trusted certificates where the", "subject contains FILTER") do |filter, options| filter ||= "" options[:list] << filter end add_option("-r", "--remove FILTER", "Remove trusted certificates where the", "subject contains FILTER") do |filter, options| options[:remove] << filter end add_option("-b", "--build EMAIL_ADDR", "Build private key and self-signed", "certificate for EMAIL_ADDR") do |email_address, options| options[:build] << email_address end add_option("-C", "--certificate CERT", "Signing certificate for --sign") do |cert_file, options| options[:issuer_cert] = open_cert(cert_file) options[:issuer_cert_file] = cert_file end add_option("-K", "--private-key KEY", "Key for --sign or --build") do |key_file, options| options[:key] = open_private_key(key_file) end add_option("-A", "--key-algorithm ALGORITHM", "Select which key algorithm to use for --build") do |algorithm, options| options[:key_algorithm] = algorithm end add_option("-s", "--sign CERT", "Signs CERT with the key from -K", "and the certificate from -C") do |cert_file, options| raise Gem::OptionParser::InvalidArgument, "#{cert_file}: does not exist" unless File.file? cert_file options[:sign] << cert_file end add_option("-d", "--days NUMBER_OF_DAYS", "Days before the certificate expires") do |days, options| options[:expiration_length_days] = days.to_i end add_option("-R", "--re-sign", "Re-signs the certificate from -C with the key from -K") do |resign, options| options[:resign] = resign end end def add_certificate(certificate) # :nodoc: Gem::Security.trust_dir.trust_cert certificate say "Added '#{certificate.subject}'" end def check_openssl return if Gem::HAVE_OPENSSL alert_error "OpenSSL library is required for the cert command" terminate_interaction 1 end def open_cert(certificate_file) check_openssl OpenSSL::X509::Certificate.new File.read certificate_file rescue Errno::ENOENT raise Gem::OptionParser::InvalidArgument, "#{certificate_file}: does not exist" rescue OpenSSL::X509::CertificateError raise Gem::OptionParser::InvalidArgument, "#{certificate_file}: invalid X509 certificate" end def open_private_key(key_file) check_openssl passphrase = ENV["GEM_PRIVATE_KEY_PASSPHRASE"] key = OpenSSL::PKey.read File.read(key_file), passphrase raise Gem::OptionParser::InvalidArgument, "#{key_file}: private key not found" unless key.private? key rescue Errno::ENOENT raise Gem::OptionParser::InvalidArgument, "#{key_file}: does not exist" rescue OpenSSL::PKey::PKeyError, ArgumentError raise Gem::OptionParser::InvalidArgument, "#{key_file}: invalid RSA, DSA, or EC key" end def execute check_openssl options[:add].each do |certificate| add_certificate certificate end options[:remove].each do |filter| remove_certificates_matching filter end options[:list].each do |filter| list_certificates_matching filter end options[:build].each do |email| build email end if options[:resign] re_sign_cert( options[:issuer_cert], options[:issuer_cert_file], options[:key] ) end sign_certificates unless options[:sign].empty? end def build(email) unless valid_email?(email) raise Gem::CommandLineError, "Invalid email address #{email}" end key, key_path = build_key cert_path = build_cert email, key say "Certificate: #{cert_path}" if key_path say "Private Key: #{key_path}" say "Don't forget to move the key file to somewhere private!" end end def build_cert(email, key) # :nodoc: expiration_length_days = options[:expiration_length_days] || Gem.configuration.cert_expiration_length_days cert = Gem::Security.create_cert_email( email, key, (Gem::Security::ONE_DAY * expiration_length_days) ) Gem::Security.write cert, "gem-public_cert.pem" end def build_key # :nodoc: return options[:key] if options[:key] passphrase = ask_for_password "Passphrase for your Private Key:" say "\n" passphrase_confirmation = ask_for_password "Please repeat the passphrase for your Private Key:" say "\n" raise Gem::CommandLineError, "Passphrase and passphrase confirmation don't match" unless passphrase == passphrase_confirmation algorithm = options[:key_algorithm] || Gem::Security::DEFAULT_KEY_ALGORITHM key = Gem::Security.create_key(algorithm) key_path = Gem::Security.write key, "gem-private_key.pem", 0o600, passphrase [key, key_path] end def certificates_matching(filter) return enum_for __method__, filter unless block_given? Gem::Security.trusted_certificates.select do |certificate, _| subject = certificate.subject.to_s subject.downcase.index filter end.sort_by do |certificate, _| certificate.subject.to_a.map {|name, data,| [name, data] } end.each do |certificate, path| yield certificate, path end end def description # :nodoc: <<-EOF The cert command manages signing keys and certificates for creating signed gems. Your signing certificate and private key are typically stored in ~/.gem/gem-public_cert.pem and ~/.gem/gem-private_key.pem respectively. To build a certificate for signing gems: gem cert --build you@example If you already have an RSA key, or are creating a new certificate for an existing key: gem cert --build you@example --private-key /path/to/key.pem If you wish to trust a certificate you can add it to the trust list with: gem cert --add /path/to/cert.pem You can list trusted certificates with: gem cert --list or: gem cert --list cert_subject_substring If you wish to remove a previously trusted certificate: gem cert --remove cert_subject_substring To sign another gem author's certificate: gem cert --sign /path/to/other_cert.pem For further reading on signing gems see `ri Gem::Security`. EOF end def list_certificates_matching(filter) # :nodoc: certificates_matching filter do |certificate, _| # this could probably be formatted more gracefully say certificate.subject.to_s end end def load_default_cert cert_file = File.join Gem.default_cert_path cert = File.read cert_file options[:issuer_cert] = OpenSSL::X509::Certificate.new cert rescue Errno::ENOENT alert_error \ "--certificate not specified and ~/.gem/gem-public_cert.pem does not exist" terminate_interaction 1 rescue OpenSSL::X509::CertificateError alert_error \ "--certificate not specified and ~/.gem/gem-public_cert.pem is not valid" terminate_interaction 1 end def load_default_key key_file = File.join Gem.default_key_path key = File.read key_file passphrase = ENV["GEM_PRIVATE_KEY_PASSPHRASE"] options[:key] = OpenSSL::PKey.read key, passphrase rescue Errno::ENOENT alert_error \ "--private-key not specified and ~/.gem/gem-private_key.pem does not exist" terminate_interaction 1 rescue OpenSSL::PKey::PKeyError alert_error \ "--private-key not specified and ~/.gem/gem-private_key.pem is not valid" terminate_interaction 1 end def load_defaults # :nodoc: load_default_cert unless options[:issuer_cert] load_default_key unless options[:key] end def remove_certificates_matching(filter) # :nodoc: certificates_matching filter do |certificate, path| FileUtils.rm path say "Removed '#{certificate.subject}'" end end def sign(cert_file) cert = File.read cert_file cert = OpenSSL::X509::Certificate.new cert permissions = File.stat(cert_file).mode & 0o777 issuer_cert = options[:issuer_cert] issuer_key = options[:key] cert = Gem::Security.sign cert, issuer_key, issuer_cert Gem::Security.write cert, cert_file, permissions end def sign_certificates # :nodoc: load_defaults unless options[:sign].empty? options[:sign].each do |cert_file| sign cert_file end end def re_sign_cert(cert, cert_path, private_key) Gem::Security::Signer.re_sign_cert(cert, cert_path, private_key) do |expired_cert_path, new_expired_cert_path| alert("Your certificate #{expired_cert_path} has been re-signed") alert("Your expired certificate will be located at: #{new_expired_cert_path}") end end private def valid_email?(email) # It's simple, but is all we need email =~ /\A.+@.+\z/ end end