1 files changed, 7 insertions, 0 deletions
diff --git a/src/algo_base/key_spec.h b/src/algo_base/key_spec.h
index 73cd9126f..15881c1a6 100644
--- a/src/algo_base/key_spec.h
+++ b/src/algo_base/key_spec.h
@@ -79,6 +79,13 @@ class BOTAN_DLL Key_Length_Specification
          return keylen_mod;
          }
 
+      Key_Length_Specification multiple(size_t n) const
+         {
+         return Key_Length_Specification(n * min_keylen,
+                                         n * max_keylen,
+                                         n * keylen_mod);
+         }
+
    private:
       size_t min_keylen, max_keylen, keylen_mod;
    };