This patch is to add for secure pseudorandom number generator on windows.
Signed-off-by: Alin Serdean <aserdean at cloudbasesolutions.com>
---
lib/entropy.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/lib/entropy.c b/lib/entropy.c
index 02f56e0..45e83ec 100644
--- a/lib/entropy.c
+++ b/lib/entropy.c
@@ -33,6 +33,7 @@ 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 +50,18 @@ 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;
+ CryptAcquireContext(&crypt_prov, NULL, NULL, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT);
+
+ if (!CryptGenRandom(crypt_prov, n, buffer)) {
+ error = GetLastError();
+ VLOG_ERR("CryptGenRandom: read error (%s)",
ovs_retval_to_string(error));
+ }
+
+ CryptReleaseContext(crypt_prov, 0);
+#endif
return error;
}
---
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