1 files changed, 9 insertions, 0 deletions
diff --git a/src/crypto/bytestring/cbb.c b/src/crypto/bytestring/cbb.c
index f1e09a2..1da6a21 100644
--- a/src/crypto/bytestring/cbb.c
+++ b/src/crypto/bytestring/cbb.c
@@ -20,6 +20,10 @@
 #include <openssl/mem.h>
 
 
+void CBB_zero(CBB *cbb) {
+  memset(cbb, 0, sizeof(CBB));
+}
+
 static int cbb_init(CBB *cbb, uint8_t *buf, size_t cap) {
   struct cbb_buffer_st *base;
 
@@ -243,6 +247,11 @@ int CBB_flush(CBB *cbb) {
   return 1;
 }
 
+size_t CBB_len(const CBB *cbb) {
+  assert(cbb->child == NULL);
+
+  return cbb->base->len;
+}
 
 static int cbb_add_length_prefixed(CBB *cbb, CBB *out_contents,
                                    size_t len_len) {