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

shrink_to_fit to actually deallocate memory.

2 files changed, 7 insertions, 1 deletions

diff --git a/src/block/idea/idea.cpp b/src/block/idea/idea.cpp
index 15062abdf..61a938c57 100644
--- a/src/block/idea/idea.cpp
+++ b/src/block/idea/idea.cpp
@@ -160,4 +160,10 @@ void IDEA::key_schedule(const byte key[], size_t)
    DK[0] = mul_inv(EK[48]);
    }
 
+void IDEA::clear()
+   {
+   zap(EK);
+   zap(DK);
+   }
+
 }
diff --git a/src/block/idea/idea.h b/src/block/idea/idea.h
index 03ecb1f03..da5dc4cb6 100644
--- a/src/block/idea/idea.h
+++ b/src/block/idea/idea.h
@@ -21,7 +21,7 @@ class BOTAN_DLL IDEA : public Block_Cipher_Fixed_Params<8, 16>
       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(); DK.clear(); }
+      void clear();
       std::string name() const { return "IDEA"; }
       BlockCipher* clone() const { return new IDEA; }
    protected: