Add checks that keyed algorithms are actually keyed before use

Previously calling update or encrypt without calling set_key first
would result in invalid outputs or else crashing.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/lib/utils/exceptn.h b/src/lib/utils/exceptn.h
index b9b94a8f8..e82889b5a 100644
--- a/src/lib/utils/exceptn.h
+++ b/src/lib/utils/exceptn.h
@@ -62,6 +62,12 @@ class BOTAN_PUBLIC_API(2,0) Invalid_State : public Exception
       explicit Invalid_State(const std::string& err) : Exception(err) {}
    };
 
+class BOTAN_PUBLIC_API(2,4) Key_Not_Set : public Invalid_State
+   {
+   public:
+      explicit Key_Not_Set(const std::string& algo);
+   };
+
 /**
 * Lookup_Error Exception
 */