os: auth: move GenerateRandomData() and make it static

Only used in mitauth.c, so we can move it there and make it static.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

os/auth.c

@@ -297,17 +297,3 @@ GenerateAuthorization(unsigned name_length,
     }
     return -1;
 }
-
-void
-GenerateRandomData(int len, char *buf)
-{
-#ifdef HAVE_ARC4RANDOM_BUF
-    arc4random_buf(buf, len);
-#else
-    int fd;
-
-    fd = open("/dev/urandom", O_RDONLY);
-    read(fd, buf, len);
-    close(fd);
-#endif
-}

os/mitauth.c

@@ -132,6 +132,20 @@ MitRemoveCookie(unsigned short data_length, const char *data)
 
 static char cookie[16];         /* 128 bits */
 
+static void
+GenerateRandomData(int len, char *buf)
+{
+#ifdef HAVE_ARC4RANDOM_BUF
+    arc4random_buf(buf, len);
+#else
+    int fd;
+
+    fd = open("/dev/urandom", O_RDONLY);
+    read(fd, buf, len);
+    close(fd);
+#endif
+}
+
 XID
 MitGenerateCookie(unsigned data_length,
                   const char *data,

os/osdep.h

@@ -134,9 +134,6 @@ extern Bool NewOutputPending;
 /* in access.c */
 extern Bool ComputeLocalClient(ClientPtr client);
 
-/* in auth.c */
-extern void GenerateRandomData(int len, char *buf);
-
 /* OsTimer functions */
 void TimerInit(void);
 Bool TimerForce(OsTimerPtr timer);