Abstract out random generation

Still depending on gcrypt for hashing, but this is a step towards
making that dependency optional.

1 files changed, 25 insertions, 0 deletions

diff --git a/src/rexmpp_random.c b/src/rexmpp_random.c
new file mode 100644
index 0000000..8efabd3
--- /dev/null
+++ b/src/rexmpp_random.c
@@ -0,0 +1,25 @@
+/**
+   @file rexmpp_random.c
+   @brief Random generation
+   @author defanor <defanor@uberspace.net>
+   @date 2023
+   @copyright MIT license.
+*/
+
+#include "config.h"
+
+#ifdef HAVE_GCRYPT
+#include <gcrypt.h>
+#else
+#define _GNU_SOURCE
+#include <stdlib.h>
+#endif
+
+
+void rexmpp_random_buf (void *buf, size_t len) {
+#ifdef HAVE_GCRYPT
+  gcry_create_nonce(buf, len);
+#else
+  arc4random_buf(buf, len);
+#endif
+}