Add ct_modulo and BigInt::ct_cond_swap

1 files changed, 7 insertions, 1 deletions

diff --git a/src/lib/math/bigint/bigint.h b/src/lib/math/bigint/bigint.h
index 64f81765a..46e0cd250 100644
--- a/src/lib/math/bigint/bigint.h
+++ b/src/lib/math/bigint/bigint.h
@@ -681,7 +681,13 @@ class BOTAN_PUBLIC_API(2,0) BigInt final
      * If predicate is true assign other to *this
      * Uses a masked operation to avoid side channels
      */
-     void ct_cond_assign(bool predicate, BigInt& other);
+     void ct_cond_assign(bool predicate, const BigInt& other);
+
+     /**
+     * If predicate is true swap *this and other
+     * Uses a masked operation to avoid side channels
+     */
+     void ct_cond_swap(bool predicate, BigInt& other);
 
 #if defined(BOTAN_HAS_VALGRIND)
      void const_time_poison() const;