1 files changed, 34 insertions, 0 deletions
diff --git a/src/rexmpp_random.c b/src/rexmpp_random.c
new file mode 100644
index 0000000..11e2b73
--- /dev/null
+++ b/src/rexmpp_random.c
@@ -0,0 +1,34 @@
+/**
+   @file rexmpp_random.c
+   @brief Random generation
+   @author defanor <defanor@uberspace.net>
+   @date 2023
+   @copyright MIT license.
+*/
+
+#include "config.h"
+#include "rexmpp_base64.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
+}
+
+char *rexmpp_random_id () {
+  char buf_raw[18], *buf_base64 = NULL;
+  size_t buf_base64_len = 0;
+  rexmpp_random_buf(buf_raw, 18);
+  rexmpp_base64_to(buf_raw, 18, &buf_base64, &buf_base64_len);
+  return buf_base64;
+}