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, 6 insertions, 0 deletions

diff --git a/src/lib/stream/stream_cipher.h b/src/lib/stream/stream_cipher.h
index e08bee0ce..b24a99e39 100644
--- a/src/lib/stream/stream_cipher.h
+++ b/src/lib/stream/stream_cipher.h
@@ -86,6 +86,12 @@ class BOTAN_DLL StreamCipher : public SymmetricAlgorithm
       */
       virtual void seek(u64bit offset) = 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"; }
+
       StreamCipher();
       virtual ~StreamCipher();
    };