From 1c5249ce95fead5317176cbad7dc92d6a69bae85 Mon Sep 17 00:00:00 2001
From: rfm <rfm@72102866-910b-0410-8b05-ffd578937521>
Date: Fri, 20 Dec 2013 17:06:30 +0000
Subject: [PATCH] get random value on mingw

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@37486 72102866-910b-0410-8b05-ffd578937521
---
 Source/NSUUID.m | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/Source/NSUUID.m b/Source/NSUUID.m
index 3cbed96cf..23e39fdbd 100644
--- a/Source/NSUUID.m
+++ b/Source/NSUUID.m
@@ -27,7 +27,11 @@
 #import "Foundation/NSCoder.h"
 #import "Foundation/NSUUID.h"
 
+#if	defined(__MINGW32__)
+#include <wincrypt.h>
+#else
 #include <fcntl.h>
+#endif
 
 static int uuid_from_string(const char *string, unsigned char *uuid);
 static void string_from_uuid(const unsigned char *uuid, char *string);
@@ -256,8 +260,6 @@ static void string_from_uuid(const unsigned char *uuid, char *string)
 
 static int random_uuid(unsigned char *uuid)
 {
-  int		devUrandom;
-  ssize_t	bytesRead;
   unsigned char timeByte;
   unsigned char sequenceByte;
 
@@ -265,6 +267,29 @@ static int random_uuid(unsigned char *uuid)
    * consistent with Apple.  Other variants suffer from privacy
    * problems (and are more work...)
    */
+
+#if	defined(__MINGW32__)
+
+  HCRYPTPROV hProvider = 0;
+
+  if (!CryptAcquireContextW(&hProvider, 0, 0,
+    PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
+    {
+      return -1;
+    }
+
+  if (!CryptGenRandom(hProvider, kUUIDByteCount, uuid))
+    {
+      CryptReleaseContext(hProvider, 0);
+      return -1;
+    }
+
+  CryptReleaseContext(hProvider, 0);
+#else
+
+  int		devUrandom;
+  ssize_t	bytesRead;
+
   devUrandom = open("/dev/urandom", O_RDONLY);
   if (devUrandom == -1)
     {
@@ -276,6 +301,8 @@ static int random_uuid(unsigned char *uuid)
     {
       return -1;
     }
+#endif
+
   /* as required by the RFC, bits 48-51 should contain 0b0100 (4)
    * and bits 64-65 should contain 0b01 (1)
    */