initial commit

ios_client/EncryptedChat/Models/DeviceBundle.swift

@@ -0,0 +1,43 @@
+import Foundation
+
+/// Key bundle for one device, used in X3DH
+struct DeviceBundle {
+    let deviceId: String
+    let identityKey: Data      // Ed25519 public key (32 bytes)
+    let spk: Data              // X25519 public key (32 bytes)
+    let spkSignature: Data     // Ed25519 signature (64 bytes)
+    let spkId: String
+    let opk: Data?             // X25519 public key (32 bytes), optional
+    let opkId: String?
+
+    /// Parse from server response dictionary
+    static func fromDict(_ dict: [String: Any]) throws -> DeviceBundle {
+        guard let deviceId = dict["device_id"] as? String,
+              let ikHex = dict["identity_key"] as? String,
+              let ik = Data(hexString: ikHex),
+              let spkHex = dict["spk"] as? String,
+              let spk = Data(hexString: spkHex),
+              let spkSigHex = dict["spk_signature"] as? String,
+              let spkSig = Data(hexString: spkSigHex),
+              let spkId = dict["spk_id"] as? String else {
+            throw ChatError.invalidData("Invalid device bundle")
+        }
+
+        var opk: Data?
+        var opkId: String?
+        if let opkHex = dict["opk"] as? String, let opkData = Data(hexString: opkHex) {
+            opk = opkData
+            opkId = dict["opk_id"] as? String
+        }
+
+        return DeviceBundle(
+            deviceId: deviceId,
+            identityKey: ik,
+            spk: spk,
+            spkSignature: spkSig,
+            spkId: spkId,
+            opk: opk,
+            opkId: opkId
+        )
+    }
+}