* random.c (fill_random_seed): use cryptographic service on Windows.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@24187 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 0 deletions

diff --git a/random.c b/random.c
index f67b65f2b..8013a51d0 100644
--- a/random.c
+++ b/random.c
@@ -389,6 +389,8 @@ fill_random_seed(unsigned int seed[DEFAULT_SEED_CNT])
 #if USE_DEV_URANDOM
     int fd;
     struct stat statbuf;
+#elif defined(_WIN32)
+    HCRYPTPROV prov;    
 #endif
 
     memset(seed, 0, DEFAULT_SEED_LEN);
@@ -410,6 +412,11 @@ fill_random_seed(unsigned int seed[DEFAULT_SEED_CNT])
         }
         close(fd);
     }
+#elif defined(_WIN32)
+    if (CryptAcquireContext(&prov, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
+	CryptGenRandom(prov, DEFAULT_SEED_LEN, seed);
+	CryptReleaseContext(prov, 0);
+    }
 #endif
 
     gettimeofday(&tv, 0);