2 files changed, 7 insertions, 0 deletions
diff --git a/src/shared/Auth/BigNumber.cpp b/src/shared/Auth/BigNumber.cpp
index 7872b141f3d..8869d3bb9e5 100644
--- a/src/shared/Auth/BigNumber.cpp
+++ b/src/shared/Auth/BigNumber.cpp
@@ -161,6 +161,11 @@ uint32 BigNumber::AsDword()
     return (uint32)BN_get_word(_bn);
 }
 
+bool BigNumber::isZero() const
+{
+    return BN_is_zero(_bn)!=0;
+}
+
 uint8 *BigNumber::AsByteArray(int minSize)
 {
     int length = (minSize >= GetNumBytes()) ? minSize : GetNumBytes();
diff --git a/src/shared/Auth/BigNumber.h b/src/shared/Auth/BigNumber.h
index b9038e86b13..ba116db3965 100644
--- a/src/shared/Auth/BigNumber.h
+++ b/src/shared/Auth/BigNumber.h
@@ -74,6 +74,8 @@ class BigNumber
             return t %= bn;
         }
 
+        bool isZero() const;
+
         BigNumber ModExp(const BigNumber &bn1, const BigNumber &bn2);
         BigNumber Exp(const BigNumber &);