Add new helper zap which zeros a vector, clears it, and then calls

shrink_to_fit to actually deallocate memory.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/block/des/desx.cpp b/src/block/des/desx.cpp
index 7f68e406a..879e73ee9 100644
--- a/src/block/des/desx.cpp
+++ b/src/block/des/desx.cpp
@@ -52,4 +52,11 @@ void DESX::key_schedule(const byte key[], size_t)
    K2.assign(key + 16, key + 24);
    }
 
+void DESX::clear()
+   {
+   des.clear();
+   zap(K1);
+   zap(K2);
+   }
+
 }