1 files changed, 34 insertions, 0 deletions

diff --git a/src/buf.c b/src/buf.c
new file mode 100644
index 0000000..4646476
--- /dev/null
+++ b/src/buf.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2018 Yubico AB. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ */
+
+#include <string.h>
+#include "fido.h"
+
+int
+fido_buf_read(const unsigned char **buf, size_t *len, void *dst, size_t count)
+{
+        if (count > *len)
+                return (-1);
+
+        memcpy(dst, *buf, count);
+        *buf += count;
+        *len -= count;
+
+        return (0);
+}
+
+int
+fido_buf_write(unsigned char **buf, size_t *len, const void *src, size_t count)
+{
+        if (count > *len)
+                return (-1);
+
+        memcpy(*buf, src, count);
+        *buf += count;
+        *len -= count;
+
+        return (0);
+}