Made some advancements on the cryptographic primitives implementation

src/crypto/ed25519.zig

@@ -9,21 +9,34 @@ pub const Implementation = struct {
 };
 
 // TODO
-pub const defaultImplementation = struct {
+pub fn defaultImplementation() type {
 
-    pub fn generateKeys(privkey_buffer: *[32]u8) !void {
-        _ = privkey_buffer;
-    }
-    
-    pub fn sign(key: *const [32]u8, data: *const []const u8, signature_out: *const [64]u8) !void {
-        _ = key;
-        _ = data;
-        _ = signature_out;
-    }
+    const Ed25519 = @import("std").crypto.sign.Ed25519;
+    _ = Ed25519;
 
-    pub fn verify(signature: *const [64]u8, data: *const []const u8) !void {
-        _ = signature;
-        _ = data;
-    }
+    // Again, some Ed25519 functions seem to rely on the io module that is not necessarily available on embedded systems
+    // It may need some custom implementation or other library
+
+    return struct {
+        
+        pub fn generateKeys(pubkey_buffer: *[32]u8, privkey_buffer: *[32]u8) !void {
+            _ = pubkey_buffer;
+            _ = privkey_buffer;
+            return error.NotImplemented;
+
+        }
     
-};
+        pub fn sign(key: *const [32]u8, data: *const []const u8, signature_out: *const [64]u8) !void {
+            _ = key;
+            _ = data;
+            _ = signature_out;
+            return error.NotImplemented;
+        }
+
+        pub fn verify(signature: *const [64]u8, data: *const []const u8) !void {
+            _ = signature;
+            _ = data;
+            return error.NotImplemented;
+        }
+    };
+}