1 files changed, 8 insertions, 5 deletions
diff --git a/src/lib/pubkey/dsa/dsa.cpp b/src/lib/pubkey/dsa/dsa.cpp
index 00d7b77d7..15dc45373 100644
--- a/src/lib/pubkey/dsa/dsa.cpp
+++ b/src/lib/pubkey/dsa/dsa.cpp
@@ -198,19 +198,22 @@ bool DSA_Verification_Operation::verify(const byte msg[], size_t msg_len,
 }
 
 std::unique_ptr<PK_Ops::Verification>
-DSA_PublicKey::create_verification_op(RandomNumberGenerator& rng,
-                                      const std::string& params,
+DSA_PublicKey::create_verification_op(const std::string& params,
                                       const std::string& provider) const
    {
-   return std::unique_ptr<PK_Ops::Verification>(new DSA_Verification_Operation(*this, params));
+   if(provider == "base" || provider.empty())
+      return std::unique_ptr<PK_Ops::Verification>(new DSA_Verification_Operation(*this, params));
+   throw Provider_Not_Found(algo_name(), provider);
    }
 
 std::unique_ptr<PK_Ops::Signature>
-DSA_PrivateKey::create_signature_op(RandomNumberGenerator& rng,
+DSA_PrivateKey::create_signature_op(RandomNumberGenerator& /*rng*/,
                                     const std::string& params,
                                     const std::string& provider) const
    {
-   return std::unique_ptr<PK_Ops::Signature>(new DSA_Signature_Operation(*this, params));
+   if(provider == "base" || provider.empty())
+      return std::unique_ptr<PK_Ops::Signature>(new DSA_Signature_Operation(*this, params));
+   throw Provider_Not_Found(algo_name(), provider);
    }
 
 }