class OpenSSL::Config

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.

Constants

DEFAULT_CONFIG_FILE: The default system configuration file for openssl
ESCAPE_MAP: escaped char map
QUOTE_REGEXP_DQ: escape with backslash and doubled dq
QUOTE_REGEXP_SQ: escape with backslash

Public Class Methods

new(filename = nil) click to toggle source

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.

# File ext/openssl/lib/openssl/config.rb, line 245
def initialize(filename = nil)
  @data = {}
  if filename
    File.open(filename.to_s) do |file|
      Config.parse_config(file).each do |section, hash|
        self[section] = hash
      end
    end
  end
end

parse(string) click to toggle source

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.

# File ext/openssl/lib/openssl/config.rb, line 35
def parse(string)
  c = new()
  parse_config(StringIO.new(string)).each do |section, hash|
    c[section] = hash
  end
  c
end

parse_config(io) click to toggle source

Parses the configuration data read from io, see also parse.

Raises a ConfigError on invalid configuration data.

# File ext/openssl/lib/openssl/config.rb, line 51
def parse_config(io)
  begin
    parse_config_lines(io)
  rescue ConfigError => e
    e.message.replace("error in line #{io.lineno}: " + e.message)
    raise
  end
end

Private Class Methods

clear_comments(line) click to toggle source

# File ext/openssl/lib/openssl/config.rb, line 176
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

extract_reference(value) click to toggle source

# File ext/openssl/lib/openssl/config.rb, line 161
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

get_definition(io) click to toggle source

# File ext/openssl/lib/openssl/config.rb, line 213
def get_definition(io)
  if line = get_line(io)
    while /[^\]\\z/ =~ line
      if extra = get_line(io)
        line += extra
      else
        break
      end
    end
    return line.strip
  end
end

get_line(io) click to toggle source

# File ext/openssl/lib/openssl/config.rb, line 226
def get_line(io)
  if line = io.gets
    line.gsub(/[\r\n]*/, '')
  end
end

parse_config_lines(io) click to toggle source

# File ext/openssl/lib/openssl/config.rb, line 75
def parse_config_lines(io)
  section = 'default'
  data = {section => {}}
  while definition = get_definition(io)
    definition = clear_comments(definition)
    next if definition.empty?
    if definition[0] == ?[
      if /\[([^\]]*)\]/ =~ definition
        section = $1.strip
        data[section] ||= {}
      else
        raise ConfigError, "missing close square bracket"
      end
    else
      if /\A([^:\s]*)(?:::([^:\s]*))?\s*=(.*)\z/ =~ definition
        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
  end
  data
end

unescape_value(data, section, value) click to toggle source

# File ext/openssl/lib/openssl/config.rb, line 118
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

Public Instance Methods

[](section) click to toggle source

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"}

# File ext/openssl/lib/openssl/config.rb, line 339
def [](section)
  @data[section] || {}
end

[]=(section, pairs) click to toggle source

Sets a specific section name with a Hash pairs

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

It's important to note that this will essentially merge any of the keys in pairs with the existing section. For example:

config['default']
  #=> {"foo"=>"bar", "baz"=>"buz"}
config['default'] = {"foo" => "changed"}
  #=> {"foo"=>"changed"}
config['default']
  #=> {"foo"=>"changed", "baz"=>"buz"}

# File ext/openssl/lib/openssl/config.rb, line 376
def []=(section, pairs)
  check_modify
  @data[section] ||= {}
  pairs.each do |key, value|
    self.add_value(section, key, value)
  end
end

add_value(section, key, value) click to toggle source

Set the target key with a given value under a specific 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 set the value of foo under the default section to a new value:

config.add_value('default', 'foo', 'buzz')
  #=> "buzz"
puts config.to_s
  #=> [ default ]
  #   foo=buzz

# File ext/openssl/lib/openssl/config.rb, line 318
def add_value(section, key, value)
  check_modify
  (@data[section] ||= {})[key] = value
end

each() { |section, key, value| ... } click to toggle source

For a block.

Receive the section and its pairs for the current configuration.

config.each do |section, key, value|
  # ...
end

# File ext/openssl/lib/openssl/config.rb, line 437
def each
  @data.each do |section, hash|
    hash.each do |key, value|
      yield [section, key, value]
    end
  end
end

get_value(section, key) click to toggle source

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"

# File ext/openssl/lib/openssl/config.rb, line 273
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

inspect() click to toggle source

String representation of this configuration object, including the class name and its sections.

# File ext/openssl/lib/openssl/config.rb, line 448
def inspect
  "#<#{self.class.name} sections=#{sections.inspect}>"
end

sections() click to toggle source

Get the names of all sections in the current configuration

# File ext/openssl/lib/openssl/config.rb, line 386
def sections
  @data.keys
end

to_s() click to toggle source

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

# File ext/openssl/lib/openssl/config.rb, line 416
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

Private Instance Methods

check_modify() click to toggle source

# File ext/openssl/lib/openssl/config.rb, line 464
def check_modify
  raise TypeError.new("Insecure: can't modify OpenSSL config") if frozen?
end

get_key_string(section, key) click to toggle source

# File ext/openssl/lib/openssl/config.rb, line 468
def get_key_string(section, key)
  Config.get_key_string(@data, section, key)
end

initialize_copy(other) click to toggle source

# File ext/openssl/lib/openssl/config.rb, line 460
def initialize_copy(other)
  @data = other.data.dup
end