implement ecdsa

myirc/include/ref.hpp

@@ -41,8 +41,10 @@ struct Ref : std::unique_ptr<T, RefDeleter<T>>
     explicit Ref(T *x) noexcept : base{x} {}
 
     Ref(Ref &&ref) noexcept = default;
-    Ref(const Ref &ref) noexcept {
-        *this = ref;
+    Ref(const Ref &ref) noexcept : base{ref.get()} {
+        if (*this) {
+            RefTraits<T>::UpRef(this->get());
+        }
     }
 
     Ref &operator=(Ref&&) noexcept = default;

myirc/include/sasl_mechanism.hpp

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "ref.hpp"
+
 #include <boost/signals2.hpp>
 
 #include <memory>
@@ -74,3 +76,35 @@ public:
         return complete_;
     }
 };
+
+
+class SaslEcdsa final : public SaslMechanism
+{
+    std::string message1_;
+    Ref<EVP_PKEY> key_;
+    int stage_;
+
+public:
+    SaslEcdsa(std::string authcid, std::string authzid, Ref<EVP_PKEY> key)
+        : message1_{std::move(authcid)}
+        , key_{std::move(key)}
+        , stage_{0}
+    {
+        if (not authzid.empty()) {
+            message1_.push_back(0);
+            message1_.append(authzid);
+        }
+    }
+
+    auto mechanism_name() const -> std::string override
+    {
+        return "ECDSA-NIST256P-CHALLENGE";
+    }
+
+    auto step(std::string_view msg) -> StepResult override;
+
+    auto is_complete() const -> bool override
+    {
+        return stage_ == 2;;
+    }
+};