Add OpenVpn over Cloak module

client/android/cloak/build.gradle.kts

@@ -0,0 +1,18 @@
+plugins {
+    id(libs.plugins.android.library.get().pluginId)
+    id(libs.plugins.kotlin.android.get().pluginId)
+}
+
+kotlin {
+    jvmToolchain(17)
+}
+
+android {
+    namespace = "org.amnezia.vpn.protocol.cloak"
+}
+
+dependencies {
+    compileOnly(project(":utils"))
+    compileOnly(project(":protocolApi"))
+    implementation(project(":openvpn"))
+}

client/android/cloak/src/main/kotlin/Cloak.kt

@@ -0,0 +1,70 @@
+package org.amnezia.vpn.protocol.cloak
+
+import android.util.Base64
+import net.openvpn.ovpn3.ClientAPI_Config
+import org.amnezia.vpn.protocol.openvpn.OpenVpn
+import org.json.JSONObject
+
+/**
+ *    Config Example:
+ *    {
+ *     "protocol": "cloak",
+ *     "description": "Server 1",
+ *     "dns1": "1.1.1.1",
+ *     "dns2": "1.0.0.1",
+ *     "hostName": "100.100.100.0",
+ *     "splitTunnelSites": [
+ *     ],
+ *     "splitTunnelType": 0,
+ *     "openvpn_config_data": {
+ *           "config": "openVpnConfig"
+ *     }
+ *     "cloak_config_data": {
+ *          "BrowserSig": "chrome",
+ *          "EncryptionMethod": "aes-gcm",
+ *          "NumConn": 1,
+ *          "ProxyMethod": "openvpn",
+ *          "PublicKey": "PublicKey=",
+ *          "RemoteHost": "100.100.100.0",
+ *          "RemotePort": "443",
+ *          "ServerName": "servername",
+ *          "StreamTimeout": 300,
+ *          "Transport": "direct",
+ *          "UID": "UID="
+ *     }
+ * }
+ */
+
+class Cloak : OpenVpn() {
+
+    override fun parseConfig(config: JSONObject): ClientAPI_Config {
+        val openVpnConfig = ClientAPI_Config()
+
+        val openVpnConfigStr = config.getJSONObject("openvpn_config_data").getString("config")
+        val cloakConfigJson = checkCloakJson(config.getJSONObject("cloak_config_data"))
+        val cloakConfigStr = Base64.encodeToString(cloakConfigJson.toString().toByteArray(), Base64.DEFAULT)
+
+        val configStr = "$openVpnConfigStr\n<cloak>\n$cloakConfigStr\n</cloak>\n"
+
+        openVpnConfig.usePluggableTransports = true
+        openVpnConfig.content = configStr
+        return openVpnConfig
+    }
+
+    private fun checkCloakJson(cloakConfigJson: JSONObject): JSONObject {
+        // todo: strange method
+        if (!cloakConfigJson.has("NumConn")) cloakConfigJson.put("NumConn", 1)
+        if (!cloakConfigJson.has("ProxyMethod")) cloakConfigJson.put("ProxyMethod", "openvpn")
+        if (cloakConfigJson.has("port")) {
+            val port = cloakConfigJson["port"]
+            cloakConfigJson.remove("port")
+            cloakConfigJson.put("RemotePort", port)
+        }
+        if (cloakConfigJson.has("remote")) {
+            val remote = cloakConfigJson["remote"]
+            cloakConfigJson.remove("remote")
+            cloakConfigJson.put("RemoteHost", remote)
+        }
+        return cloakConfigJson
+    }
+}