1 files changed, 8 insertions, 1 deletions

diff --git a/src/lib/libcrypto/bn/bn_lib.c b/src/lib/libcrypto/bn/bn_lib.c
index df43da5db6..851c337ef0 100644
--- a/src/lib/libcrypto/bn/bn_lib.c
+++ b/src/lib/libcrypto/bn/bn_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bn_lib.c,v 1.65 2022/11/30 02:52:25 jsing Exp $ */
+/* $OpenBSD: bn_lib.c,v 1.66 2022/11/30 03:08:39 jsing Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -253,6 +253,13 @@ BN_num_bits(const BIGNUM *a)
         return ((i * BN_BITS2) + BN_num_bits_word(a->d[i]));
 }
 
+void
+bn_correct_top(BIGNUM *a)
+{
+        while (a->top > 0 && a->d[a->top - 1] == 0)
+                a->top--;
+}
+
 /* The caller MUST check that words > b->dmax before calling this */
 static BN_ULONG *
 bn_expand_internal(const BIGNUM *b, int words)