[ruby/openssl] config: revert to C implementation of OpenSSL::Config

Revert OpenSSL::Config to using the OpenSSL API and remove our own
parser implementation for the config file syntax.

OpenSSL::Config now wraps a CONF object. Accessor methods deal with the
object directly rather than Ruby-level internal state.

This work is based on the old C code we used before 2010.

https://github.com/ruby/openssl/commit/c891e0ea89

2 files changed, 0 insertions, 412 deletions

diff --git a/ext/openssl/lib/openssl.rb b/ext/openssl/lib/openssl.rb
index b047485785..8a342f15b6 100644
--- a/ext/openssl/lib/openssl.rb
+++ b/ext/openssl/lib/openssl.rb
@@ -15,7 +15,6 @@ require 'openssl.so'
 require_relative 'openssl/bn'
 require_relative 'openssl/pkey'
 require_relative 'openssl/cipher'
-require_relative 'openssl/config'
 require_relative 'openssl/digest'
 require_relative 'openssl/hmac'
 require_relative 'openssl/x509'
diff --git a/ext/openssl/lib/openssl/config.rb b/ext/openssl/lib/openssl/config.rb
deleted file mode 100644
index 46e1711d28..0000000000
--- a/ext/openssl/lib/openssl/config.rb
+++ /dev/null
@@ -1,411 +0,0 @@
-# frozen_string_literal: true
-=begin
-= Ruby-space definitions that completes C-space funcs for Config
-
-= Info
-  Copyright (C) 2010  Hiroshi Nakamura <[email protected]>
-
-= Licence
-  This program is licensed under the same licence as Ruby.
-  (See the file 'LICENCE'.)
-
-=end
-
-require 'stringio'
-
-module OpenSSL
-  ##
-  # = OpenSSL::Config
-  #
-  # Configuration for the openssl library.
-  #
-  # Many system's installation of openssl library will depend on your system
-  # configuration. See the value of OpenSSL::Config::DEFAULT_CONFIG_FILE for
-  # the location of the file for your host.
-  #
-  # See also http://www.openssl.org/docs/apps/config.html
-  class Config
-    include Enumerable
-
-    class << self
-
-      ##
-      # Parses a given _string_ as a blob that contains configuration for
-      # OpenSSL.
-      #
-      # If the source of the IO is a file, then consider using #parse_config.
-      def parse(string)
-        c = new()
-        parse_config(StringIO.new(string)).each do |section, hash|
-          c.set_section(section, hash)
-        end
-        c
-      end
-
-      ##
-      # load is an alias to ::new
-      alias load new
-
-      ##
-      # Parses the configuration data read from _io_, see also #parse.
-      #
-      # Raises a ConfigError on invalid configuration data.
-      def parse_config(io)
-        begin
-          parse_config_lines(io)
-        rescue => error
-          raise ConfigError, "error in line #{io.lineno}: " + error.message
-        end
-      end
-
-      def get_key_string(data, section, key) # :nodoc:
-        if v = data[section] && data[section][key]
-          return v
-        elsif section == 'ENV'
-          if v = ENV[key]
-            return v
-          end
-        end
-        if v = data['default'] && data['default'][key]
-          return v
-        end
-      end
-
-    private
-
-      def parse_config_lines(io)
-        section = 'default'
-        data = {section => {}}
-        io_stack = [io]
-        while definition = get_definition(io_stack)
-          definition = clear_comments(definition)
-          next if definition.empty?
-          case definition
-          when /\A\[/
-            if /\[([^\]]*)\]/ =~ definition
-              section = $1.strip
-              data[section] ||= {}
-            else
-              raise ConfigError, "missing close square bracket"
-            end
-          when /\A\.include (\s*=\s*)?(.+)\z/
-            path = $2
-            if File.directory?(path)
-              files = Dir.glob(File.join(path, "*.{cnf,conf}"), File::FNM_EXTGLOB)
-            else
-              files = [path]
-            end
-
-            files.each do |filename|
-              begin
-                io_stack << StringIO.new(File.read(filename))
-              rescue
-                raise ConfigError, "could not include file '%s'" % filename
-              end
-            end
-          when /\A([^:\s]*)(?:::([^:\s]*))?\s*=(.*)\z/
-            if $2
-              section = $1
-              key = $2
-            else
-              key = $1
-            end
-            value = unescape_value(data, section, $3)
-            (data[section] ||= {})[key] = value.strip
-          else
-            raise ConfigError, "missing equal sign"
-          end
-        end
-        data
-      end
-
-      # escape with backslash
-      QUOTE_REGEXP_SQ = /\A([^'\\]*(?:\\.[^'\\]*)*)'/
-      # escape with backslash and doubled dq
-      QUOTE_REGEXP_DQ = /\A([^"\\]*(?:""[^"\\]*|\\.[^"\\]*)*)"/
-      # escaped char map
-      ESCAPE_MAP = {
-        "r" => "\r",
-        "n" => "\n",
-        "b" => "\b",
-        "t" => "\t",
-      }
-
-      def unescape_value(data, section, value)
-        scanned = []
-        while m = value.match(/['"\\$]/)
-          scanned << m.pre_match
-          c = m[0]
-          value = m.post_match
-          case c
-          when "'"
-            if m = value.match(QUOTE_REGEXP_SQ)
-              scanned << m[1].gsub(/\\(.)/, '\\1')
-              value = m.post_match
-            else
-              break
-            end
-          when '"'
-            if m = value.match(QUOTE_REGEXP_DQ)
-              scanned << m[1].gsub(/""/, '').gsub(/\\(.)/, '\\1')
-              value = m.post_match
-            else
-              break
-            end
-          when "\\"
-            c = value.slice!(0, 1)
-            scanned << (ESCAPE_MAP[c] || c)
-          when "$"
-            ref, value = extract_reference(value)
-            refsec = section
-            if ref.index('::')
-              refsec, ref = ref.split('::', 2)
-            end
-            if v = get_key_string(data, refsec, ref)
-              scanned << v
-            else
-              raise ConfigError, "variable has no value"
-            end
-          else
-            raise 'must not reaced'
-          end
-        end
-        scanned << value
-        scanned.join
-      end
-
-      def extract_reference(value)
-        rest = ''
-        if m = value.match(/\(([^)]*)\)|\{([^}]*)\}/)
-          value = m[1] || m[2]
-          rest = m.post_match
-        elsif [?(, ?{].include?(value[0])
-          raise ConfigError, "no close brace"
-        end
-        if m = value.match(/[a-zA-Z0-9_]*(?:::[a-zA-Z0-9_]*)?/)
-          return m[0], m.post_match + rest
-        else
-          raise
-        end
-      end
-
-      def clear_comments(line)
-        # FCOMMENT
-        if m = line.match(/\A([\t\n\f ]*);.*\z/)
-          return m[1]
-        end
-        # COMMENT
-        scanned = []
-        while m = line.match(/[#'"\\]/)
-          scanned << m.pre_match
-          c = m[0]
-          line = m.post_match
-          case c
-          when '#'
-            line = nil
-            break
-          when "'", '"'
-            regexp = (c == "'") ? QUOTE_REGEXP_SQ : QUOTE_REGEXP_DQ
-            scanned << c
-            if m = line.match(regexp)
-              scanned << m[0]
-              line = m.post_match
-            else
-              scanned << line
-              line = nil
-              break
-            end
-          when "\\"
-            scanned << c
-            scanned << line.slice!(0, 1)
-          else
-            raise 'must not reaced'
-          end
-        end
-        scanned << line
-        scanned.join
-      end
-
-      def get_definition(io_stack)
-        if line = get_line(io_stack)
-          while /[^\\]\\\z/ =~ line
-            if extra = get_line(io_stack)
-              line += extra
-            else
-              break
-            end
-          end
-          return line.strip
-        end
-      end
-
-      def get_line(io_stack)
-        while io = io_stack.last
-          if line = io.gets
-            return line.gsub(/[\r\n]*/, '')
-          end
-          io_stack.pop
-        end
-      end
-    end
-
-    ##
-    # Creates an instance of OpenSSL's configuration class.
-    #
-    # This can be used in contexts like OpenSSL::X509::ExtensionFactory.config=
-    #
-    # If the optional _filename_ parameter is provided, then it is read in and
-    # parsed via #parse_config.
-    #
-    # This can raise IO exceptions based on the access, or availability of the
-    # file. A ConfigError exception may be raised depending on the validity of
-    # the data being configured.
-    #
-    def initialize(filename = nil)
-      @data = {}
-      if filename
-        File.open(filename.to_s) do |file|
-          Config.parse_config(file).each do |section, hash|
-            set_section(section, hash)
-          end
-        end
-      end
-    end
-
-    ##
-    # Gets the value of _key_ from the given _section_
-    #
-    # Given the following configurating file being loaded:
-    #
-    #   config = OpenSSL::Config.load('foo.cnf')
-    #     #=> #<OpenSSL::Config sections=["default"]>
-    #   puts config.to_s
-    #     #=> [ default ]
-    #     #   foo=bar
-    #
-    # You can get a specific value from the config if you know the _section_
-    # and _key_ like so:
-    #
-    #   config.get_value('default','foo')
-    #     #=> "bar"
-    #
-    def get_value(section, key)
-      if section.nil?
-        raise TypeError.new('nil not allowed')
-      end
-      section = 'default' if section.empty?
-      get_key_string(section, key)
-    end
-
-    ##
-    # Get a specific _section_ from the current configuration
-    #
-    # Given the following configurating file being loaded:
-    #
-    #   config = OpenSSL::Config.load('foo.cnf')
-    #     #=> #<OpenSSL::Config sections=["default"]>
-    #   puts config.to_s
-    #     #=> [ default ]
-    #     #   foo=bar
-    #
-    # You can get a hash of the specific section like so:
-    #
-    #   config['default']
-    #     #=> {"foo"=>"bar"}
-    #
-    def [](section)
-      @data[section] || {}
-    end
-
-    def set_section(section, pairs) # :nodoc:
-      hash = @data[section] ||= {}
-      pairs.each do |key, value|
-        hash[key] = value
-      end
-    end
-
-    ##
-    # Get the names of all sections in the current configuration
-    def sections
-      @data.keys
-    end
-
-    ##
-    # Get the parsable form of the current configuration
-    #
-    # Given the following configuration being created:
-    #
-    #   config = OpenSSL::Config.new
-    #     #=> #<OpenSSL::Config sections=[]>
-    #   config['default'] = {"foo"=>"bar","baz"=>"buz"}
-    #     #=> {"foo"=>"bar", "baz"=>"buz"}
-    #   puts config.to_s
-    #     #=> [ default ]
-    #     #   foo=bar
-    #     #   baz=buz
-    #
-    # You can parse get the serialized configuration using #to_s and then parse
-    # it later:
-    #
-    #   serialized_config = config.to_s
-    #   # much later...
-    #   new_config = OpenSSL::Config.parse(serialized_config)
-    #     #=> #<OpenSSL::Config sections=["default"]>
-    #   puts new_config
-    #     #=> [ default ]
-    #         foo=bar
-    #         baz=buz
-    #
-    def to_s
-      ary = []
-      @data.keys.sort.each do |section|
-        ary << "[ #{section} ]\n"
-        @data[section].keys.each do |key|
-          ary << "#{key}=#{@data[section][key]}\n"
-        end
-        ary << "\n"
-      end
-      ary.join
-    end
-
-    ##
-    # For a block.
-    #
-    # Receive the section and its pairs for the current configuration.
-    #
-    #   config.each do |section, key, value|
-    #     # ...
-    #   end
-    #
-    def each
-      @data.each do |section, hash|
-        hash.each do |key, value|
-          yield [section, key, value]
-        end
-      end
-    end
-
-    ##
-    # String representation of this configuration object, including the class
-    # name and its sections.
-    def inspect
-      "#<#{self.class.name} sections=#{sections.inspect}>"
-    end
-
-  protected
-
-    def data # :nodoc:
-      @data
-    end
-
-  private
-
-    def initialize_copy(other)
-      @data = other.data.dup
-    end
-
-    def get_key_string(section, key)
-      Config.get_key_string(@data, section, key)
-    end
-  end
-end