chore: initial project import

backend/fleet/src/Fleet.Rpc/PeerMethods.cs

@@ -0,0 +1,52 @@
+using System.Text.Json.Serialization;
+
+namespace Fleet.Rpc;
+
+/// <summary>
+/// 节点间点对点会话的握手（Probe → Agent，TLS 帧）。除了签名认证，双方各生成一个临时 ECDH 密钥，
+/// 经过 HKDF 派生出数据面使用的 <c>session_id</c> 与 <c>session_key</c>（所以不需要单独的“下发密钥”方法）。
+/// </summary>
+public static class PeerMethods
+{
+    public const string Challenge = "fleet.peer.challenge";
+    public const string Auth = "fleet.peer.auth";
+}
+
+public sealed class PeerChallengeParams
+{
+    [JsonPropertyName("nonce")]
+    public string Nonce { get; set; } = "";
+
+    /// <summary>服务端（监听方）的临时 ECDH 公钥（SPKI，base64）。</summary>
+    [JsonPropertyName("ecdh_pub")]
+    public string EcdhPublicKey { get; set; } = "";
+}
+
+public sealed class PeerAuthParams
+{
+    [JsonPropertyName("peer_id")]
+    public string PeerId { get; set; } = "";
+
+    /// <summary>发起方的临时 ECDH 公钥（SPKI，base64）。</summary>
+    [JsonPropertyName("ecdh_pub")]
+    public string EcdhPublicKey { get; set; } = "";
+
+    /// <summary>对 <c>fleet|v1|peer|{peer_id}|{nonce}|{client_ecdh_pub}|{server_ecdh_pub}</c> 的签名（base64）。</summary>
+    [JsonPropertyName("signature")]
+    public string Signature { get; set; } = "";
+
+    /// <summary>发起方的程序版本（可选，只用于展示）。</summary>
+    [JsonPropertyName("version")]
+    public string? Version { get; set; }
+}
+
+public sealed class PeerAuthResult
+{
+    [JsonPropertyName("session_id")]
+    public string SessionId { get; set; } = "";
+}
+
+[JsonSerializable(typeof(PeerChallengeParams))]
+[JsonSerializable(typeof(PeerAuthParams))]
+[JsonSerializable(typeof(PeerAuthResult))]
+public sealed partial class PeerRpcContext : JsonSerializerContext;