1 files changed, 69 insertions, 0 deletions
diff --git a/misc/win32/rand.c b/misc/win32/rand.c
new file mode 100644
index 0000000..cb5a653
--- /dev/null
+++ b/misc/win32/rand.c
@@ -0,0 +1,69 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr.h"
+#include <rpc.h>
+#include <wincrypt.h>
+#include "apr_private.h"
+#include "apr_general.h"
+#include "apr_portable.h"
+#include "apr_arch_misc.h"
+
+
+APR_DECLARE(apr_status_t) apr_generate_random_bytes(unsigned char * buf,
+                                                    apr_size_t length)
+{
+    HCRYPTPROV hProv;
+    apr_status_t res = APR_SUCCESS;
+
+    /* 0x40 bit = CRYPT_SILENT, only introduced in more recent PSDKs 
+     * and will only work for Win2K and later.
+     */
+    DWORD flags = CRYPT_VERIFYCONTEXT
+                | ((apr_os_level >= APR_WIN_2000) ? 0x40 : 0);
+
+    if (!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL, flags)) {
+	return apr_get_os_error();
+    }
+    /* XXX: An ugly hack for Win64, randomness is such that noone should
+     * ever expect > 2^31 bytes of data at once without the prng
+     * coming to a complete halt.
+     */
+    if (!CryptGenRandom(hProv, (DWORD)length, buf)) {
+    	res = apr_get_os_error();
+    }
+    CryptReleaseContext(hProv, 0);
+    return res;
+}
+
+
+APR_DECLARE(apr_status_t) apr_os_uuid_get(unsigned char *uuid_data)
+{
+    /* Note: this call doesn't actually require CoInitialize() first 
+     *
+     * XXX: we should scramble the bytes or some such to eliminate the
+     * possible misuse/abuse since uuid is based on the NIC address, and
+     * is therefore not only a uniqifier, but an identity (which might not
+     * be appropriate in all cases.
+     *
+     * Note that Win2000, XP and later no longer suffer from this problem,
+     * a scrambling fix is only needed for (apr_os_level < APR_WIN_2000)
+     */
+    if (FAILED(UuidCreate((UUID *)uuid_data))) {
+        return APR_EGENERAL;
+    }
+    return APR_SUCCESS;
+}