diff options
Diffstat (limited to 'railties/lib/rails_generator/secret_key_generator.rb')
-rw-r--r-- | railties/lib/rails_generator/secret_key_generator.rb | 152 |
1 files changed, 5 insertions, 147 deletions
diff --git a/railties/lib/rails_generator/secret_key_generator.rb b/railties/lib/rails_generator/secret_key_generator.rb index 5ae492312e..553811d35d 100644 --- a/railties/lib/rails_generator/secret_key_generator.rb +++ b/railties/lib/rails_generator/secret_key_generator.rb @@ -5,160 +5,18 @@ module Rails # # generator = Rails::SecretKeyGenerator("some unique identifier, such as the application name") # generator.generate_secret # => "f3f1be90053fa851... (some long string)" + # + # This class is *deprecated* in Rails 2.2 in favor of ActiveSupport::SecureRandom. + # It is currently a wrapper around ActiveSupport::SecureRandom. class SecretKeyGenerator - GENERATORS = [ :secure_random, :win32_api, :urandom, :openssl, :prng ].freeze - def initialize(identifier) - @identifier = identifier end # Generate a random secret key with the best possible method available on # the current platform. def generate_secret - generator = GENERATORS.find do |g| - self.class.send("supports_#{g}?") - end - send("generate_secret_with_#{generator}") - end - - # Generate a random secret key by using the Win32 API. Raises LoadError - # if the current platform cannot make use of the Win32 API. Raises - # SystemCallError if some other error occurred. - def generate_secret_with_win32_api - # Following code is based on David Garamond's GUID library for Ruby. - require 'Win32API' - - crypt_acquire_context = Win32API.new("advapi32", "CryptAcquireContext", - 'PPPII', 'L') - crypt_gen_random = Win32API.new("advapi32", "CryptGenRandom", - 'LIP', 'L') - crypt_release_context = Win32API.new("advapi32", "CryptReleaseContext", - 'LI', 'L') - prov_rsa_full = 1 - crypt_verifycontext = 0xF0000000 - - hProvStr = " " * 4 - if crypt_acquire_context.call(hProvStr, nil, nil, prov_rsa_full, - crypt_verifycontext) == 0 - raise SystemCallError, "CryptAcquireContext failed: #{lastWin32ErrorMessage}" - end - hProv, = hProvStr.unpack('L') - bytes = " " * 64 - if crypt_gen_random.call(hProv, bytes.size, bytes) == 0 - raise SystemCallError, "CryptGenRandom failed: #{lastWin32ErrorMessage}" - end - if crypt_release_context.call(hProv, 0) == 0 - raise SystemCallError, "CryptReleaseContext failed: #{lastWin32ErrorMessage}" - end - bytes.unpack("H*")[0] - end - - # Generate a random secret key with Ruby 1.9's SecureRandom module. - # Raises LoadError if the current Ruby version does not support - # SecureRandom. - def generate_secret_with_secure_random - require 'securerandom' - return SecureRandom.hex(64) - end - - # Generate a random secret key with OpenSSL. If OpenSSL is not - # already loaded, then this method will attempt to load it. - # LoadError will be raised if that fails. - def generate_secret_with_openssl - require 'openssl' - if !File.exist?("/dev/urandom") - # OpenSSL transparently seeds the random number generator with - # data from /dev/urandom. On platforms where that is not - # available, such as Windows, we have to provide OpenSSL with - # our own seed. Unfortunately there's no way to provide a - # secure seed without OS support, so we'll have to do with - # rand() and Time.now.usec(). - OpenSSL::Random.seed(rand(0).to_s + Time.now.usec.to_s) - end - data = OpenSSL::BN.rand(2048, -1, false).to_s - - if OpenSSL::OPENSSL_VERSION_NUMBER > 0x00908000 - OpenSSL::Digest::SHA512.new(data).hexdigest - else - generate_secret_with_prng - end + ActiveSupport::SecureRandom.hex(64) end - - # Generate a random secret key with /dev/urandom. - # Raises SystemCallError on failure. - def generate_secret_with_urandom - return File.read("/dev/urandom", 64).unpack("H*")[0] - end - - # Generate a random secret key with Ruby's pseudo random number generator, - # as well as some environment information. - # - # This is the least cryptographically secure way to generate a secret key, - # and should be avoided whenever possible. - def generate_secret_with_prng - require 'digest/sha2' - sha = Digest::SHA2.new(512) - now = Time.now - sha << now.to_s - sha << String(now.usec) - sha << String(rand(0)) - sha << String($$) - sha << @identifier - return sha.hexdigest - end - - private - def lastWin32ErrorMessage - # Following code is based on David Garamond's GUID library for Ruby. - get_last_error = Win32API.new("kernel32", "GetLastError", '', 'L') - format_message = Win32API.new("kernel32", "FormatMessageA", - 'LPLLPLPPPPPPPP', 'L') - format_message_ignore_inserts = 0x00000200 - format_message_from_system = 0x00001000 - - code = get_last_error.call - msg = "\0" * 1024 - len = format_message.call(format_message_ignore_inserts + - format_message_from_system, 0, - code, 0, msg, 1024, nil, nil, - nil, nil, nil, nil, nil, nil) - msg[0, len].tr("\r", '').chomp - end - - def self.supports_secure_random? - begin - require 'securerandom' - true - rescue LoadError - false - end - end - - def self.supports_win32_api? - return false unless RUBY_PLATFORM =~ /(:?mswin|mingw)/ - begin - require 'Win32API' - true - rescue LoadError - false - end - end - - def self.supports_urandom? - File.exist?('/dev/urandom') - end - - def self.supports_openssl? - begin - require 'openssl' - true - rescue LoadError - false - end - end - - def self.supports_prng? - true - end + deprecate :generate_secret=>"You should use ActiveSupport::SecureRandom.hex(64)" end end |