1 files changed, 29 insertions, 0 deletions
diff --git a/LibMatrix.Federation/Extensions/XMatrixAuthorizationSchemeExtensions.cs b/LibMatrix.Federation/Extensions/XMatrixAuthorizationSchemeExtensions.cs
new file mode 100644
index 0000000..b520b1c
--- /dev/null
+++ b/LibMatrix.Federation/Extensions/XMatrixAuthorizationSchemeExtensions.cs
@@ -0,0 +1,29 @@
+using System.Net.Http.Json;
+using LibMatrix.Abstractions;
+
+namespace LibMatrix.Federation.Extensions;
+
+public static class XMatrixAuthorizationSchemeExtensions {
+    public static HttpRequestMessage ToSignedHttpRequestMessage(this XMatrixAuthorizationScheme.XMatrixRequestSignature requestSignature,
+        VersionedHomeserverPrivateKey privateKey) {
+        var signature = requestSignature.Sign(privateKey);
+        var requestMessage = new HttpRequestMessage {
+            Method = new HttpMethod(requestSignature.Method),
+            RequestUri = new Uri(requestSignature.Uri, UriKind.Relative)
+        };
+
+        var headerValue = new XMatrixAuthorizationScheme.XMatrixAuthorizationHeader() {
+            Origin = requestSignature.OriginServerName,
+            Key = privateKey.KeyId,
+            Destination = requestSignature.DestinationServerName,
+            Signature = signature.Signatures[requestSignature.OriginServerName][privateKey.KeyId]
+        }.ToHeaderValue();
+        requestMessage.Headers.Add("Authorization", headerValue);
+
+        if (requestSignature.Content != null) {
+            requestMessage.Content = JsonContent.Create(requestSignature.Content);
+        }
+
+        return requestMessage;
+    }
+}
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