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using System.Text.Json;
using System.Text.Json.Nodes;
using LibMatrix.Abstractions;
using LibMatrix.Extensions;
using LibMatrix.FederationTest.Utilities;
using LibMatrix.Responses.Federation;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math.EC.Rfc8032;
namespace LibMatrix.Federation.Extensions;
public static class ObjectExtensions {
public static SignedObject<T> Sign<T>(this T content, string serverName, string keyName, Ed25519PrivateKeyParameters key) {
SignedObject<T> signedObject = new() {
Signatures = [],
Content = JsonSerializer.Deserialize<JsonObject>(JsonSerializer.Serialize(content)) ?? new JsonObject(),
};
var contentBytes = CanonicalJsonSerializer.SerializeToUtf8Bytes(signedObject.Content);
var signature = new byte[Ed25519.SignatureSize];
key.Sign(Ed25519.Algorithm.Ed25519, null, contentBytes, 0, contentBytes.Length, signature, 0);
if (!signedObject.Signatures.ContainsKey(serverName))
signedObject.Signatures[serverName] = new Dictionary<string, string>();
signedObject.Signatures[serverName][keyName] = UnpaddedBase64.Encode(signature);
return signedObject;
}
public static SignedObject<T> Sign<T>(this T content, VersionedHomeserverPrivateKey privateKey)
=> Sign(content, privateKey.ServerName, privateKey.KeyId, privateKey.GetPrivateEd25519Key());
}
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