1 files changed, 29 insertions, 0 deletions
diff --git a/util/token.c b/util/token.c
new file mode 100644
index 00000000..cf6034a3
--- /dev/null
+++ b/util/token.c
@@ -0,0 +1,29 @@
+#include "util/token.h"
+#include "wlr/util/log.h"
+
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+bool generate_token(char out[static TOKEN_STRLEN]) {
+	static FILE *urandom = NULL;
+	uint64_t data[2];
+
+	if (!urandom) {
+		if (!(urandom = fopen("/dev/urandom", "r"))) {
+			wlr_log_errno(WLR_ERROR, "Failed to open random device");
+			return false;
+		}
+	}
+	if (fread(data, sizeof(data), 1, urandom) != 1) {
+		wlr_log_errno(WLR_ERROR, "Failed to read from random device");
+		return false;
+	}
+	if (snprintf(out, TOKEN_STRLEN, "%016" PRIx64 "%016" PRIx64, data[0], data[1]) != TOKEN_STRLEN - 1) {
+		wlr_log_errno(WLR_ERROR, "Failed to format hex string token");
+		return false;
+	}
+	return true;
+}
+