Class: Fluent::CaGenerate

Inherits:
Object
  • Object
show all
Defined in:
lib/fluent/command/ca_generate.rb

Constant Summary collapse

DEFAULT_OPTIONS = 
{
  private_key_length: 2048,
  cert_country:  'US',
  cert_state:    'CA',
  cert_locality: 'Mountain View',
  cert_common_name: 'Fluentd Forward CA',
}
HELP_TEXT = 
<<HELP
Usage: fluent-ca-generate DIR_PATH PRIVATE_KEY_PASSPHRASE [--country COUNTRY] [--state STATE] [--locality LOCALITY] [--common-name COMMON_NAME]
HELP

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(argv = ARGV) ⇒ CaGenerate

Returns a new instance of CaGenerate.



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# File 'lib/fluent/command/ca_generate.rb', line 19

def initialize(argv = ARGV)
  @argv = argv
  @options = {}
  @opt_parser = OptionParser.new
  configure_option_parser
  @options.merge!(DEFAULT_OPTIONS)
  parse_options!
end

Class Method Details

.certificates_from_file(path) ⇒ Object 



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# File 'lib/fluent/command/ca_generate.rb', line 59

def self.certificates_from_file(path)
  data = File.read(path)
  pattern = Regexp.compile('-+BEGIN CERTIFICATE-+\n(?:[^-]*\n)+-+END CERTIFICATE-+\n', Regexp::MULTILINE)
  list = []
  data.scan(pattern){|match| list << OpenSSL::X509::Certificate.new(match)}
  list
end

.generate_ca_pair(opts = {}) ⇒ Object 



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# File 'lib/fluent/command/ca_generate.rb', line 67

def self.generate_ca_pair(opts={})
  key = OpenSSL::PKey::RSA.generate(opts[:private_key_length])

  issuer = subject = OpenSSL::X509::Name.new
  subject.add_entry('C', opts[:cert_country])
  subject.add_entry('ST', opts[:cert_state])
  subject.add_entry('L', opts[:cert_locality])
  subject.add_entry('CN', opts[:cert_common_name])

  digest = OpenSSL::Digest::SHA256.new

  factory = OpenSSL::X509::ExtensionFactory.new

  cert = OpenSSL::X509::Certificate.new
  cert.not_before = Time.at(0)
  cert.not_after = Time.now + 5 * 365 * 86400 # 5 years after
  cert.public_key = key
  cert.serial = 1
  cert.issuer = issuer
  cert.subject = subject
  cert.add_extension(factory.create_extension('basicConstraints', 'CA:TRUE'))
  cert.sign(key, digest)

  return cert, key
end

.generate_self_signed_server_pair(opts = {}) ⇒ Object 



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# File 'lib/fluent/command/ca_generate.rb', line 125

def self.generate_self_signed_server_pair(opts={})
  key = OpenSSL::PKey::RSA.generate(opts[:private_key_length])

  issuer = subject = OpenSSL::X509::Name.new
  subject.add_entry('C', opts[:country])
  subject.add_entry('ST', opts[:state])
  subject.add_entry('L', opts[:locality])
  subject.add_entry('CN', opts[:common_name])

  digest = OpenSSL::Digest::SHA256.new

  cert = OpenSSL::X509::Certificate.new
  cert.not_before = Time.at(0)
  cert.not_after = Time.now + 5 * 365 * 86400 # 5 years after
  cert.public_key = key
  cert.serial = 1
  cert.issuer = issuer
  cert.subject  = subject
  cert.sign(key, digest)

  return cert, key
end

.generate_server_pair(opts = {}) ⇒ Object 



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# File 'lib/fluent/command/ca_generate.rb', line 93

def self.generate_server_pair(opts={})
  key = OpenSSL::PKey::RSA.generate(opts[:private_key_length])

  ca_key = OpenSSL::PKey::read(File.read(opts[:ca_key_path]), opts[:ca_key_passphrase])
  ca_cert = OpenSSL::X509::Certificate.new(File.read(opts[:ca_cert_path]))
  issuer = ca_cert.issuer

  subject = OpenSSL::X509::Name.new
  subject.add_entry('C', opts[:country])
  subject.add_entry('ST', opts[:state])
  subject.add_entry('L', opts[:locality])
  subject.add_entry('CN', opts[:common_name])

  digest = OpenSSL::Digest::SHA256.new

  cert = OpenSSL::X509::Certificate.new
  cert.not_before = Time.at(0)
  cert.not_after = Time.now + 5 * 365 * 86400 # 5 years after
  cert.public_key = key
  cert.serial = 2
  cert.issuer = issuer
  cert.subject = subject

  factory = OpenSSL::X509::ExtensionFactory.new
  server_cert.add_extension(factory.create_extension('basicConstraints', 'CA:FALSE'))
  server_cert.add_extension(factory.create_extension('nsCertType', 'server'))

  cert.sign ca_key, digest

  return cert, key
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/fluent/command/ca_generate.rb', line 34

def call
  ca_dir, passphrase, = @argv[0..1]

  unless ca_dir && passphrase
    puts "#{HELP_TEXT}"
    puts ''
    exit 1
  end

  FileUtils.mkdir_p(ca_dir)

  cert, key = Fluent::CaGenerate.generate_ca_pair(@options)

  key_data = key.export(OpenSSL::Cipher.new('aes256'), passphrase)
  File.open(File.join(ca_dir, 'ca_key.pem'), 'w') do |file|
    file.write key_data
  end
  File.open(File.join(ca_dir, 'ca_cert.pem'), 'w') do |file|
    file.write cert.to_pem
  end

  puts "successfully generated: ca_key.pem, ca_cert.pem"
  puts "copy and use ca_cert.pem to client(out_forward)"
end

#usage(msg = nil) ⇒ Object 



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# File 'lib/fluent/command/ca_generate.rb', line 28

def usage(msg = nil)
  puts HELP_TEXT
  puts "Error: #{msg}" if msg
  exit 1
end