# module OpenSSL::X509::Extension::CRLDistributionPoints

### Public Instance Methods

crl_uris() click to toggle source

Get the distributionPoint fullName `URI` from the certificate's `CRL` distribution points extension, as described in RFC5280 Section 4.2.1.13

Returns an array of strings or nil or raises `ASN1::ASN1Error`.

    # File ext/openssl/lib/openssl/x509.rb, line 129
    def crl_uris
      ext = find_extension("crlDistributionPoints")
      return nil if ext.nil?

      cdp_asn1 = ASN1.decode(ext.value_der)
      if cdp_asn1.tag_class != :UNIVERSAL || cdp_asn1.tag != ASN1::SEQUENCE
        raise ASN1::ASN1Error, "invalid extension"
      end

      crl_uris = cdp_asn1.map do |crl_distribution_point|
        distribution_point = crl_distribution_point.value.find do |v|
          v.tag_class == :CONTEXT_SPECIFIC && v.tag == 0
        end
        full_name = distribution_point&.value&.find do |v|
          v.tag_class == :CONTEXT_SPECIFIC && v.tag == 0
        end
        full_name&.value&.find do |v|
          v.tag_class == :CONTEXT_SPECIFIC && v.tag == 6 # uniformResourceIdentifier
        end
      end

      crl_uris&.map(&:value)
    end