Signed-off-by: Alin Serdean <aserdean at cloudbasesolutions.com>
---
diff --git a/lib/entropy.c b/lib/entropy.c
index 02f56e0..a7dac34 100644
--- a/lib/entropy.c
+++ b/lib/entropy.c
@@ -20,6 +20,9 @@
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
+#ifdef _WIN32
+#include <Wincrypt.h>
+#endif
#include "socket-util.h"
#include "vlog.h"
@@ -33,6 +36,7 @@ static const char urandom[] = "/dev/urandom";
int
get_entropy(void *buffer, size_t n)
{
+#ifndef _WIN32
size_t bytes_read;
int error;
int fd;
@@ -49,6 +53,31 @@ get_entropy(void *buffer, size_t n)
if (error) {
VLOG_ERR("%s: read error (%s)", urandom, ovs_retval_to_string(error));
}
+#else
+ int error = 0;
+ HCRYPTPROV crypt_prov = 0;
+ LPVOID msg_buf;
+
+ CryptAcquireContext(&crypt_prov, NULL, NULL,
+ PROV_RSA_FULL, CRYPT_VERIFYCONTEXT);
+ if (!CryptGenRandom(crypt_prov, n, buffer)) {
+ error = EINVAL;
+ FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER
+ | FORMAT_MESSAGE_FROM_SYSTEM
+ | FORMAT_MESSAGE_IGNORE_INSERTS,
+ NULL,
+ GetLastError(),
+ 0,
+ (LPTSTR)&msg_buf,
+ 0,
+ NULL
+ );
+ VLOG_ERR("CryptGenRandom: read error (%s)", msg_buf);
+ LocalFree(msg_buf);
+ }
+
+ CryptReleaseContext(crypt_prov, 0);
+#endif
return error;
}
---
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