2 files changed, 34 insertions, 6 deletions
diff --git a/include/signer/noscrypt_signer.hpp b/include/signer/noscrypt_signer.hpp
index 606438e..7201c12 100644
--- a/include/signer/noscrypt_signer.hpp
+++ b/include/signer/noscrypt_signer.hpp
@@ -2,11 +2,7 @@
 
 #include <plog/Init.h>
 #include <plog/Log.h>
-
-extern "C"
-{
 #include <noscrypt.h>
-}
 
 #include "service/nostr_service_base.hpp"
 #include "signer/signer.hpp"
@@ -32,10 +28,14 @@ public:
         std::string url,
         std::string description) override;
 
-    void sign(std::shared_ptr<data::Event> event) override;
+    std::shared_ptr<std::promise<bool>> sign(std::shared_ptr<data::Event> event) override;
 
 private:
     std::shared_ptr<NCContext> _noscryptContext;
+    std::shared_ptr<nostr::service::INostrServiceBase> _nostrService;
+
+    std::shared_ptr<NCPublicKey> _remotePubkey; // TODO: Set this when available.
+    std::shared_ptr<NCSecretKey> _localSecret;
 
     std::string _localPrivateKey;
     std::string _localPublicKey;
@@ -79,6 +79,31 @@ private:
      */
     void _handleConnectionTokenParam(std::string param);
 
+    /**
+     * @brief Generates a unique ID for a signer request.
+     * @returns A GUID string.
+     */
+    std::string _generateSignerRequestId();
+
+    #pragma region Cryptography
+
+    /**
+     * @brief Reseeds OpenSSL's pseudo-random number generator, using `/dev/random` as the seed, if
+     * possible.
+    */
+    void _reseedRandomNumberGenerator(uint32_t bufferSize = 32);
+
+    std::string _encryptNip04();
+
+    /**
+     * @brief Encrypts a string according to the standard specified in NIP-44.
+     * @param input The string to be encrypted.
+     * @return The encrypted input.
+     */
+    std::string _encryptNip44(const std::string input); // TODO: Return or set HMAC?
+
+    #pragma endregion
+
     #pragma region Logging
 
     void _logNoscryptInitResult(NCResult initResult);
diff --git a/include/signer/signer.hpp b/include/signer/signer.hpp
index c774d1d..0faaff8 100644
--- a/include/signer/signer.hpp
+++ b/include/signer/signer.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <future>
 #include <memory>
 #include <string>
 #include <vector>
@@ -21,9 +22,11 @@ public:
     /**
      * @brief Signs the given Nostr event.
      * @param event The event to sign.
+     * @returns A promise that will be fulfilled when the event has been signed.  It will be
+     * fulfilled with `true` if the signing succeeded, and `false` if it failed.
      * @remark The event's `sig` field will be updated in-place with the signature.
      */
-    virtual void sign(std::shared_ptr<nostr::data::Event> event) = 0;
+    virtual std::shared_ptr<std::promise<bool>> sign(std::shared_ptr<nostr::data::Event> event) = 0;
 };
 
 class INostrConnectSigner : public ISigner