ruby/ruby · error · OpenSSL::X509::NameError

invalid pair: #{str}

Error message

invalid pair: #{str}

What it means

Error "invalid pair: #{str}" thrown in ruby/ruby.

Source

Thrown at ext/openssl/lib/openssl/x509.rb:232

        QuoteChar = /[^\\"]/
        AttributeType = /[a-zA-Z][0-9a-zA-Z]*|[0-9]+(?:\.[0-9]+)*/
        AttributeValue = /
          (?!["#])((?:#{StringChar}|#{Pair})*)|
          \#(#{HexString})|
          "((?:#{QuoteChar}|#{Pair})*)"
        /x
        TypeAndValue = /\A(#{AttributeType})=#{AttributeValue}/

        module_function

        def expand_pair(str)
          return nil unless str
          return str.gsub(Pair){
            pair = $&
            case pair.size
            when 2 then pair[1,1]
            when 3 then Integer("0x#{pair[1,2]}").chr
            else raise OpenSSL::X509::NameError, "invalid pair: #{str}"
            end
          }
        end

        def expand_hexstring(str)
          return nil unless str
          der = str.gsub(HexPair){$&.to_i(16).chr }
          a1 = OpenSSL::ASN1.decode(der)
          return a1.value, a1.tag
        end

        def expand_value(str1, str2, str3)
          value = expand_pair(str1)
          value, tag = expand_hexstring(str2) unless value
          value = expand_pair(str3) unless value
          return value, tag
        end

View on GitHub (pinned to 0e5b888e1c)

When it happens

Trigger: Thrown at ext/openssl/lib/openssl/x509.rb:232 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ruby/ruby@0e5b888e1c (2026-08-21). Data as JSON: /api/errors/b5a83b29d68bfc04. Report an issue: GitHub.