Add helper and update comment

1 files changed, 8 insertions, 2 deletions

diff --git a/src/lib/modes/aead/aead.h b/src/lib/modes/aead/aead.h
index 8df98fcad..5f6c1583d 100644
--- a/src/lib/modes/aead/aead.h
+++ b/src/lib/modes/aead/aead.h
@@ -26,8 +26,8 @@ class BOTAN_DLL AEAD_Mode : public Cipher_Mode
 
       /**
       * Set associated data that is not included in the ciphertext but
-      * that should be authenticated. Must be called after set_key
-      * and before finish.
+      * that should be authenticated. Must be called after set_key and
+      * before start.
       *
       * Unless reset by another call, the associated data is kept
       * between messages. Thus, if the AD does not change, calling
@@ -44,6 +44,12 @@ class BOTAN_DLL AEAD_Mode : public Cipher_Mode
          set_associated_data(&ad[0], ad.size());
          }
 
+      template<typename Alloc>
+      void set_ad(const std::vector<byte, Alloc>& ad)
+         {
+         set_associated_data(&ad[0], ad.size());
+         }
+
       /**
       * Default AEAD nonce size (a commonly supported value among AEAD
       * modes, and large enough that random collisions are unlikely).