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

shrink_to_fit to actually deallocate memory.

2 files changed, 6 insertions, 1 deletions

diff --git a/src/block/gost_28147/gost_28147.cpp b/src/block/gost_28147/gost_28147.cpp
index db144a81f..09ca9a57e 100644
--- a/src/block/gost_28147/gost_28147.cpp
+++ b/src/block/gost_28147/gost_28147.cpp
@@ -169,4 +169,9 @@ void GOST_28147_89::key_schedule(const byte key[], size_t)
       EK[i] = load_le<u32bit>(key, i);
    }
 
+void GOST_28147_89::clear()
+   {
+   zap(EK);
+   }
+
 }
diff --git a/src/block/gost_28147/gost_28147.h b/src/block/gost_28147/gost_28147.h
index 7c77fea06..34b99197e 100644
--- a/src/block/gost_28147/gost_28147.h
+++ b/src/block/gost_28147/gost_28147.h
@@ -55,7 +55,7 @@ class BOTAN_DLL GOST_28147_89 : public Block_Cipher_Fixed_Params<8, 32>
       void encrypt_n(const byte in[], byte out[], size_t blocks) const;
       void decrypt_n(const byte in[], byte out[], size_t blocks) const;
 
-      void clear() { EK.clear(); }
+      void clear();
 
       std::string name() const;
       BlockCipher* clone() const { return new GOST_28147_89(SBOX); }