Add T::provider() to allow user to inquire about implementation used

For block ciphers, stream ciphers, hashes, MACs, and cipher modes.
Cipher_Mode already had it, with a slightly different usage.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/lib/stream/chacha/chacha.h b/src/lib/stream/chacha/chacha.h
index 7e9e54768..19ed6d25f 100644
--- a/src/lib/stream/chacha/chacha.h
+++ b/src/lib/stream/chacha/chacha.h
@@ -26,6 +26,8 @@ class BOTAN_DLL ChaCha final : public StreamCipher
       */
       ChaCha(size_t rounds = 20);
 
+      const char* provider() const override;
+
       void cipher(const byte in[], byte out[], size_t length) override;
 
       void set_iv(const byte iv[], size_t iv_len) override;