Merge GH #623 Merge algorithm impl types

If CPU specific optimizations are available they are always used,
without requiring the application to use the application registry to
ensure they get the optimal type.

See also GH #477

1 files changed, 7 insertions, 0 deletions

diff --git a/src/lib/mac/mac.h b/src/lib/mac/mac.h
index fe3388f3b..ae8ea5405 100644
--- a/src/lib/mac/mac.h
+++ b/src/lib/mac/mac.h
@@ -51,6 +51,13 @@ class BOTAN_DLL MessageAuthenticationCode : public Buffered_Computation,
       * Get a new object representing the same algorithm as *this
       */
       virtual MessageAuthenticationCode* clone() const = 0;
+
+      /**
+      * @return provider information about this implementation. Default is "base",
+      * might also return "sse2", "avx2", "openssl", or some other arbitrary string.
+      */
+      virtual std::string provider() const { return "base"; }
+
    };
 
 typedef MessageAuthenticationCode MAC;