1 files changed, 71 insertions, 0 deletions
diff --git a/src/polypcore/random.c b/src/polypcore/random.c
new file mode 100644
index 00000000..12f27bfd
--- /dev/null
+++ b/src/polypcore/random.c
@@ -0,0 +1,71 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+ 
+  polypaudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+ 
+  You should have received a copy of the GNU Lesser General Public
+  License along with polypaudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <time.h>
+
+#include "random.h"
+#include "util.h"
+#include "log.h"
+
+#ifndef OS_IS_WIN32
+#define RANDOM_DEVICE "/dev/urandom"
+#endif
+
+void pa_random(void *ret_data, size_t length) {
+    int fd;
+    ssize_t r = 0;
+    assert(ret_data && length);
+
+#ifdef RANDOM_DEVICE
+    if ((fd = open(RANDOM_DEVICE, O_RDONLY)) >= 0) {
+
+        if ((r = pa_loop_read(fd, ret_data, length)) < 0 || (size_t) r != length)
+            pa_log_error(__FILE__": failed to read entropy from '%s'\n", RANDOM_DEVICE);
+
+        close(fd);
+    }
+#endif
+
+    if ((size_t) r != length) {
+        uint8_t *p;
+        size_t l;
+
+#ifdef RANDOM_DEVICE        
+        pa_log_warn(__FILE__": WARNING: Failed to open entropy device '"RANDOM_DEVICE"': %s"
+                    ", falling back to unsecure pseudo RNG.\n", strerror(errno));
+#endif
+
+        srand(time(NULL));
+        
+        for (p = ret_data, l = length; l > 0; p++, l--)
+            *p = (uint8_t) rand();
+    }
+}