method

generate_secret_with_win32_api

v2.1.0 - Show latest stable - 0 notes - Class: Rails::SecretKeyGenerator

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What's this?

generate_secret_with_win32_api() public

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 occured.

Show source

# File railties/lib/rails_generator/secret_key_generator.rb, line 27
    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_secret_with_win32_api

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