From eeeb7ae8c06164dfe445db35f08eea0255c2617a Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 14 Feb 2015 03:01:36 +0000
Subject: random.c: Random.raw_seed

* random.c (random_raw_seed): extract platform dependent random
  seed initialization function as a new method Random.raw_seed.
* lib/securerandom.rb (SecureRandom): use Random.raw_seed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49593 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/securerandom.rb | 83 +++++------------------------------------------------
 1 file changed, 7 insertions(+), 76 deletions(-)

(limited to 'lib')

diff --git a/lib/securerandom.rb b/lib/securerandom.rb
index 476f5e1233..96117e6976 100644
--- a/lib/securerandom.rb
+++ b/lib/securerandom.rb
@@ -47,56 +47,6 @@ end
 #
 
 module SecureRandom
-  if /mswin|mingw/ =~ RUBY_PLATFORM
-    require "fiddle/import"
-
-    module AdvApi32 # :nodoc:
-      extend Fiddle::Importer
-      dlload "advapi32"
-      extern "int CryptAcquireContext(void*, void*, void*, unsigned long, unsigned long)"
-      extern "int CryptGenRandom(void*, unsigned long, void*)"
-
-      def self.get_provider
-        hProvStr = " " * Fiddle::SIZEOF_VOIDP
-        prov_rsa_full = 1
-        crypt_verifycontext = 0xF0000000
-
-        if CryptAcquireContext(hProvStr, nil, nil, prov_rsa_full, crypt_verifycontext) == 0
-          raise SystemCallError, "CryptAcquireContext failed: #{lastWin32ErrorMessage}"
-        end
-        type = Fiddle::SIZEOF_VOIDP == Fiddle::SIZEOF_LONG_LONG ? 'q' : 'l'
-        hProv, = hProvStr.unpack(type)
-        hProv
-      end
-
-      def self.gen_random(n)
-        @hProv ||= get_provider
-        bytes = " ".force_encoding("ASCII-8BIT") * n
-        if CryptGenRandom(@hProv, bytes.size, bytes) == 0
-          raise SystemCallError, "CryptGenRandom failed: #{Kernel32.last_error_message}"
-        end
-        bytes
-      end
-    end
-
-    module Kernel32 # :nodoc:
-      extend Fiddle::Importer
-      dlload "kernel32"
-      extern "unsigned long GetLastError()"
-      extern "unsigned long FormatMessageA(unsigned long, void*, unsigned long, unsigned long, void*, unsigned long, void*)"
-
-      # Following code is based on David Garamond's GUID library for Ruby.
-      def self.last_error_message
-        format_message_ignore_inserts = 0x00000200
-        format_message_from_system    = 0x00001000
-
-        code = GetLastError()
-        msg = "\0" * 1024
-        len = FormatMessageA(format_message_ignore_inserts + format_message_from_system, 0, code, 0, msg, 1024, nil)
-        msg[0, len].force_encoding("filesystem").tr("\r", '').chomp
-      end
-    end
-  end
 
   # SecureRandom.random_bytes generates a random binary string.
   #
@@ -129,35 +79,16 @@ module SecureRandom
       end
       return OpenSSL::Random.random_bytes(n)
     end
-  elsif defined?(AdvApi32)
-    def self.gen_random(n)
-      return AdvApi32.gen_random(n)
-    end
-
-    def self.lastWin32ErrorMessage # :nodoc:
-      # for compatibility
-      return Kernel32.last_error_message
-    end
   else
     def self.gen_random(n)
-      flags = File::RDONLY
-      flags |= File::NONBLOCK if defined? File::NONBLOCK
-      flags |= File::NOCTTY if defined? File::NOCTTY
-      begin
-        File.open("/dev/urandom", flags) {|f|
-          unless f.stat.chardev?
-            break
-          end
-          ret = f.read(n)
-          unless ret.length == n
-            raise NotImplementedError, "Unexpected partial read from random device: only #{ret.length} for #{n} bytes"
-          end
-          return ret
-        }
-      rescue Errno::ENOENT
+      ret = Random.raw_seed(n)
+      unless ret
+        raise NotImplementedError, "No random device"
       end
-
-      raise NotImplementedError, "No random device"
+      unless ret.length == n
+        raise NotImplementedError, "Unexpected partial read from random device: only #{ret.length} for #{n} bytes"
+      end
+      ret
     end
   end
 
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