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authorNicolas Noble <pixel@nobis-crew.org>2013-08-09 15:12:08 -0700
committerNicolas Noble <pixel@nobis-crew.org>2013-08-09 15:12:08 -0700
commita345ecd14505b1d3808a91a9dfa5a53a0edacbde (patch)
tree50e06f85776b3bb39cfe761680dd104b1fd4a5a8
parent316907b08ac47efc37845ec5d66f098fcae70a1a (diff)
Trying to come up with a more cross-platform secure random number generator.
-rw-r--r--lcrypt/lcrypt.c46
1 files changed, 34 insertions, 12 deletions
diff --git a/lcrypt/lcrypt.c b/lcrypt/lcrypt.c
index 620c88b..a0a45e5 100644
--- a/lcrypt/lcrypt.c
+++ b/lcrypt/lcrypt.c
@@ -221,20 +221,42 @@ static int lcrypt_time(lua_State *L)
static int lcrypt_random(lua_State *L)
{
int len = luaL_checkint(L, 1);
- FILE *fp;
char *buffer = lcrypt_malloc(L, len);
- if(unlikely((fp = fopen("/dev/urandom", "rb")) == NULL))
- {
- lua_pushstring(L, "Unable to open /dev/urandom.");
- (void)lua_error(L);
- }
- if(unlikely(fread(buffer, len, 1, fp) != 1))
- {
+ #ifdef _WIN32
+ HMODULE hLib = LoadLibrary("ADVAPI32.DLL");
+ if (unlikely(!hLib))
+ {
+ lua_pushstring(L, "Unable to open ADVAPI32.DLL");
+ (void)lua_error(L);
+ }
+ BOOLEAN (APIENTRY *pfn)(void *, ULONG) =
+ (BOOLEAN (APIENTRY *)(void *, ULONG)) GetProcAddress(hLib, "SystemFunction036");
+ if (unlikely(!pfn))
+ {
+ lua_pushstring(L, "Unable to open ADVAPI32.DLL");
+ (void)lua_error(L);
+ }
+ ULONG ulCbBuff = len;
+ if (unlikely(!pfn(buffer, ulCbBuff)))
+ {
+ lua_pushstring(L, "Call to SystemFunction036 failed.");
+ (void)lua_error(L);
+ }
+ #else
+ FILE *fp;
+ if(unlikely((fp = fopen("/dev/urandom", "rb")) == NULL))
+ {
+ lua_pushstring(L, "Unable to open /dev/urandom.");
+ (void)lua_error(L);
+ }
+ if(unlikely(fread(buffer, len, 1, fp) != 1))
+ {
+ fclose(fp);
+ lua_pushstring(L, "Unable to read /dev/urandom.");
+ (void)lua_error(L);
+ }
fclose(fp);
- lua_pushstring(L, "Unable to read /dev/urandom.");
- (void)lua_error(L);
- }
- fclose(fp);
+ #endif
lua_pushlstring(L, buffer, len);
free(buffer);
return 1;