# class Gem::Security::TrustDir

The `TrustDir` manages the trusted certificates for gem signature verification.

### Constants

DEFAULT_PERMISSIONS

  Default permissions for the trust directory and its contents

### Attributes

dir[R]

The directory where trusted certificates will be stored.

### Public Class Methods

new(dir, permissions = DEFAULT_PERMISSIONS) click to toggle source

Creates a new `TrustDir` using `dir` where the directory and file permissions will be checked according to `permissions`

    # File lib/rubygems/security/trust_dir.rb, line 24
    def initialize(dir, permissions = DEFAULT_PERMISSIONS)
      @dir = dir
      @permissions = permissions

      @digester = Gem::Security.create_digest
    end

### Public Instance Methods

cert_path(certificate) click to toggle source

Returns the path to the trusted `certificate`

    # File lib/rubygems/security/trust_dir.rb, line 34
    def cert_path(certificate)
      name_path certificate.subject
    end

each_certificate() { |certificate, certificate_file| ... } click to toggle source

Enumerates trusted certificates.

    # File lib/rubygems/security/trust_dir.rb, line 41
    def each_certificate
      return enum_for __method__ unless block_given?

      glob = File.join @dir, '*.pem'

      Dir[glob].each do |certificate_file|
        begin
          certificate = load_certificate certificate_file

          yield certificate, certificate_file
        rescue OpenSSL::X509::CertificateError
          next # HACK warn
        end
      end
    end

issuer_of(certificate) click to toggle source

Returns the issuer certificate of the given `certificate` if it exists in the trust directory.

    # File lib/rubygems/security/trust_dir.rb, line 61
    def issuer_of(certificate)
      path = name_path certificate.issuer

      return unless File.exist? path

      load_certificate path
    end

load_certificate(certificate_file) click to toggle source

Loads the given `certificate_file`

    # File lib/rubygems/security/trust_dir.rb, line 81
    def load_certificate(certificate_file)
      pem = File.read certificate_file

      OpenSSL::X509::Certificate.new pem
    end

name_path(name) click to toggle source

Returns the path to the trusted certificate with the given ASN.1 `name`

    # File lib/rubygems/security/trust_dir.rb, line 72
    def name_path(name)
      digest = @digester.hexdigest name.to_s

      File.join @dir, "cert-#{digest}.pem"
    end

trust_cert(certificate) click to toggle source

Add a certificate to trusted certificate list.

    # File lib/rubygems/security/trust_dir.rb, line 90
    def trust_cert(certificate)
      verify

      destination = cert_path certificate

      File.open destination, 'wb', 0600 do |io|
        io.write certificate.to_pem
        io.chmod(@permissions[:trusted_cert])
      end
    end

verify() click to toggle source

Make sure the trust directory exists. If it does exist, make sure it’s actually a directory. If not, then create it with the appropriate permissions.

    # File lib/rubygems/security/trust_dir.rb, line 106
    def verify
      require 'fileutils'
      if File.exist? @dir
        raise Gem::Security::Exception,
          "trust directory #{@dir} is not a directory" unless
            File.directory? @dir

        FileUtils.chmod 0700, @dir
      else
        FileUtils.mkdir_p @dir, :mode => @permissions[:trust_dir]
      end
    end