Add IDrive backend and API subset

14 files changed, 738 insertions, 1 deletions

diff --git a/Duplicati/CommandLine/BackendTool/Duplicati.CommandLine.BackendTool.csproj b/Duplicati/CommandLine/BackendTool/Duplicati.CommandLine.BackendTool.csproj
index f344da03f..54c49db41 100644
--- a/Duplicati/CommandLine/BackendTool/Duplicati.CommandLine.BackendTool.csproj
+++ b/Duplicati/CommandLine/BackendTool/Duplicati.CommandLine.BackendTool.csproj
@@ -64,6 +64,10 @@
       <Project>{F61679A9-E5DE-468A-B5A4-05F92D0143D2}</Project>

       <Name>Duplicati.Library.Backend.FTP</Name>

     </ProjectReference>

+    <ProjectReference Include="..\..\Library\Backend\IDrive\Duplicati.Library.Backend.IDrive.csproj">

+      <Project>{c16639f6-dacc-4dd9-86cd-8b937516b340}</Project>

+      <Name>Duplicati.Library.Backend.IDrive</Name>

+    </ProjectReference>

     <ProjectReference Include="..\..\Library\Backend\Jottacloud\Duplicati.Library.Backend.Jottacloud.csproj">

       <Project>{2cd5dbc3-3da6-432d-ba97-f0b8d24501c2}</Project>

       <Name>Duplicati.Library.Backend.Jottacloud</Name>

@@ -166,6 +170,8 @@
     </ProjectReference>

   </ItemGroup>

   <ItemGroup>

-    <None Include="app.config" />

+    <None Include="app.config">

+      <SubType>Designer</SubType>

+    </None>

   </ItemGroup>

 </Project>
\ No newline at end of file
diff --git a/Duplicati/CommandLine/Duplicati.CommandLine.csproj b/Duplicati/CommandLine/Duplicati.CommandLine.csproj
index e6fc646ef..efd5352ea 100644
--- a/Duplicati/CommandLine/Duplicati.CommandLine.csproj
+++ b/Duplicati/CommandLine/Duplicati.CommandLine.csproj
@@ -95,6 +95,10 @@
       <Project>{FC9B7611-836F-4127-8B44-A7C31F506807}</Project>

       <Name>Duplicati.Library.Backend.File</Name>

     </ProjectReference>

+    <ProjectReference Include="..\Library\Backend\IDrive\Duplicati.Library.Backend.IDrive.csproj">

+      <Project>{c16639f6-dacc-4dd9-86cd-8b937516b340}</Project>

+      <Name>Duplicati.Library.Backend.IDrive</Name>

+    </ProjectReference>

     <ProjectReference Include="..\Library\Backend\Jottacloud\Duplicati.Library.Backend.Jottacloud.csproj">

       <Project>{2cd5dbc3-3da6-432d-ba97-f0b8d24501c2}</Project>

       <Name>Duplicati.Library.Backend.Jottacloud</Name>

diff --git a/Duplicati/CommandLine/RecoveryTool/Duplicati.CommandLine.RecoveryTool.csproj b/Duplicati/CommandLine/RecoveryTool/Duplicati.CommandLine.RecoveryTool.csproj
index a4d631b04..204c9690a 100644
--- a/Duplicati/CommandLine/RecoveryTool/Duplicati.CommandLine.RecoveryTool.csproj
+++ b/Duplicati/CommandLine/RecoveryTool/Duplicati.CommandLine.RecoveryTool.csproj
@@ -98,6 +98,10 @@
       <Project>{D60AD540-0E7D-40CE-83AE-D26E01FFE9B8}</Project>

       <Name>Duplicati.Library.Backend.HubiC</Name>

     </ProjectReference>

+    <ProjectReference Include="..\..\Library\Backend\IDrive\Duplicati.Library.Backend.IDrive.csproj">

+      <Project>{c16639f6-dacc-4dd9-86cd-8b937516b340}</Project>

+      <Name>Duplicati.Library.Backend.IDrive</Name>

+    </ProjectReference>

     <ProjectReference Include="..\..\Library\Backend\Jottacloud\Duplicati.Library.Backend.Jottacloud.csproj">

       <Project>{2cd5dbc3-3da6-432d-ba97-f0b8d24501c2}</Project>

       <Name>Duplicati.Library.Backend.Jottacloud</Name>

diff --git a/Duplicati/GUI/Duplicati.GUI.TrayIcon/Duplicati.GUI.TrayIcon.csproj b/Duplicati/GUI/Duplicati.GUI.TrayIcon/Duplicati.GUI.TrayIcon.csproj
index df66bc6bc..542d5e9d4 100644
--- a/Duplicati/GUI/Duplicati.GUI.TrayIcon/Duplicati.GUI.TrayIcon.csproj
+++ b/Duplicati/GUI/Duplicati.GUI.TrayIcon/Duplicati.GUI.TrayIcon.csproj
@@ -189,6 +189,10 @@
       <Project>{F61679A9-E5DE-468A-B5A4-05F92D0143D2}</Project>

       <Name>Duplicati.Library.Backend.FTP</Name>

     </ProjectReference>

+    <ProjectReference Include="..\..\Library\Backend\IDrive\Duplicati.Library.Backend.IDrive.csproj">

+      <Project>{c16639f6-dacc-4dd9-86cd-8b937516b340}</Project>

+      <Name>Duplicati.Library.Backend.IDrive</Name>

+    </ProjectReference>

     <ProjectReference Include="..\..\Library\Backend\Jottacloud\Duplicati.Library.Backend.Jottacloud.csproj">

       <Project>{2cd5dbc3-3da6-432d-ba97-f0b8d24501c2}</Project>

       <Name>Duplicati.Library.Backend.Jottacloud</Name>

diff --git a/Duplicati/Library/Backend/IDrive/Duplicati.Library.Backend.IDrive.csproj b/Duplicati/Library/Backend/IDrive/Duplicati.Library.Backend.IDrive.csproj
new file mode 100644
index 000000000..c49153699
--- /dev/null
+++ b/Duplicati/Library/Backend/IDrive/Duplicati.Library.Backend.IDrive.csproj
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{C16639F6-DACC-4DD9-86CD-8B937516B340}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <RootNamespace>Duplicati.Library.Backend.IDrive</RootNamespace>
+    <AssemblyName>Duplicati.Library.Backend.IDrive</AssemblyName>
+    <AssemblyOriginatorKeyFile>Duplicati.snk</AssemblyOriginatorKeyFile>
+    <TargetFrameworkVersion>v4.7.1</TargetFrameworkVersion>
+    <UseMSBuildEngine>false</UseMSBuildEngine>
+    <TargetFrameworkProfile />
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>full</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="IDriveApiClient.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="IDriveBackend.cs" />
+    <Compile Include="Strings.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <ItemGroup>
+    <ProjectReference Include="..\..\Interface\Duplicati.Library.Interface.csproj">
+      <Project>{C5899F45-B0FF-483C-9D38-24A9FCAAB237}</Project>
+      <Name>Duplicati.Library.Interface</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Localization\Duplicati.Library.Localization.csproj">
+      <Project>{B68F2214-951F-4F78-8488-66E1ED3F50BF}</Project>
+      <Name>Duplicati.Library.Localization</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Utility\Duplicati.Library.Utility.csproj">
+      <Project>{DE3E5D4C-51AB-4E5E-BEE8-E636CEBFBA65}</Project>
+      <Name>Duplicati.Library.Utility</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Common\Duplicati.Library.Common.csproj">
+      <Project>{D63E53E4-A458-4C2F-914D-92F715F58ACF}</Project>
+      <Name>Duplicati.Library.Common</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="app.config" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/Duplicati/Library/Backend/IDrive/Duplicati.snk b/Duplicati/Library/Backend/IDrive/Duplicati.snk
new file mode 100644
index 000000000..e0c1e2dd8
--- /dev/null
+++ b/Duplicati/Library/Backend/IDrive/Duplicati.snk
diff --git a/Duplicati/Library/Backend/IDrive/IDriveApiClient.cs b/Duplicati/Library/Backend/IDrive/IDriveApiClient.cs
new file mode 100644
index 000000000..a94ea3f1e
--- /dev/null
+++ b/Duplicati/Library/Backend/IDrive/IDriveApiClient.cs
@@ -0,0 +1,352 @@
+//  Copyright (C) 2015, The Duplicati Team
+//  http://www.duplicati.com, info@duplicati.com
+//
+//  This library is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU Lesser General Public License as
+//  published by the Free Software Foundation; either version 2.1 of the
+//  License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful, but
+//  WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+using Duplicati.Library.Common.IO;
+using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.IO;
+using System.Linq;
+using System.Net.Http;
+using System.Reflection;
+using System.Security.Authentication;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Xml;
+
+// Full IDrive Sync API documentation can be found here: https://www.idrivesync.com/evs/web-developers-guide.htm
+namespace Duplicati.Library.Backend.IDrive
+{
+    /// <summary>
+    /// Provides access to an IDrive Sync.
+    /// </summary>
+    public class IDriveApiClient
+    {
+        private const string IDRIVE_AUTH_CGI_URL = "https://www1.idrive.com/cgi-bin/v1/user-details.cgi";
+        private const string IDRIVE_SYNC_GET_SERVER_ADDRESS_URL = "https://evs.idrivesync.com/evs/getServerAddress";
+        private const string SUCCESS = "SUCCESS";
+        private const string MESSAGE_ATTRIBUTE = "message";
+        private const string XML_RESPONSE_TAG = "tree";
+
+        private string _idriveUsername;
+        private string _idrivePassword;
+
+        private string _syncUsername;
+        private string _syncPassword;
+        private string _syncHostname;
+
+        public string UserAgent { get; set; } = "Duplicati-IDrive-API-Client/" + Assembly.GetExecutingAssembly().GetName().Version;
+
+        public IDriveApiClient()
+        {
+        }
+
+        public async Task LoginAsync(string username, string password)
+        {
+            _idriveUsername = username;
+            _idrivePassword = password;
+
+            await IDriveAuthAsync();
+            await UpdateSyncHostnameAsync();
+        }
+
+        private async Task IDriveAuthAsync()
+        {
+            // IDrive auth logic was reverse engineered from code found in the IDriveForLinux PERL scripts provided by IDrive. Download from: https://www.idrive.com/linux-backup-scripts
+            // The auth response payload contains the login credentials for the associated IDrive Sync account.
+            const string methodName = IDRIVE_AUTH_CGI_URL;
+            using (var httpClient = GetHttpClient())
+            {
+                var parameters = new List<KeyValuePair<string, string>>() {
+                    new KeyValuePair<string, string> ( "username", _idriveUsername),
+                    new KeyValuePair<string, string> ( "password", _idrivePassword)
+                };
+                var content = new FormUrlEncodedContent(parameters);
+                using (var response = await httpClient.PostAsync(IDRIVE_AUTH_CGI_URL, content))
+                {
+                    if (response.StatusCode != System.Net.HttpStatusCode.OK)
+                        throw new AuthenticationException($"Failed IDrive authentication request. Server response: {response}");
+
+                    // Sample response (masked): "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n\n<root>\n  <login remote_manage_ip=\"173.255.13.30\" quota=\"5000000000000\" datacenter=\"evsvirginia.idrive.com\" enctype=\"DEFAULT\" pns_sync=\"notify2.idrive.com\" remote_manage_server_https=\"wsn16s.idrive.com\" jspsrvr=\"www.idrive.com\" plan_type=\"Regular\" dedup=\"on\" username_sync=\"abc12345678901234def\" password_sync=\"fed09887654321098cba\" dedup_enabled=\"no\" desc=\"Success\" evssrvrip=\"148.51.142.138\" plan=\"Personal\" acctype=\"IBSYNC\" cnfgstat=\"SET\" accstat=\"Y\" evswebsrvr=\"evsweb5114.idrive.com\" remote_manage_websock_server=\"yes\" evssrvr=\"evs5114.idrive.com\" message=\"SUCCESS\" remote_manage_ip_https=\"173.255.13.31\" cnfgstatus=\"Y\" remote_manage_server=\"wsn16.idrive.com\" evswebsrvrip=\"148.51.142.139\" quota_used=\"100000000000\"></login>\n</root>\n"
+                    string responseString = await response.Content.ReadAsStringAsync();
+                    var responseXml = new XmlDocument();
+                    responseXml.LoadXml(responseString);
+                    var nodes = responseXml.GetElementsByTagName("login");
+                    if (nodes.Count == 0)
+                        throw new AuthenticationException($"Failed '{methodName}' request. Unexpected authentication response data (no login element). Server response: {response}");
+
+                    var responseNode = nodes[0];
+
+                    if (responseNode.Attributes[MESSAGE_ATTRIBUTE]?.Value != SUCCESS)
+                        throw new AuthenticationException($"Failed IDrive authentication request. Non-{SUCCESS}. Description: {responseNode.Attributes["desc"]?.Value}");
+
+                    _syncUsername = responseNode.Attributes["username_sync"]?.Value;
+                    _syncPassword = responseNode.Attributes["password_sync"]?.Value;
+
+                    if (string.IsNullOrEmpty(_syncUsername) || string.IsNullOrEmpty(_syncPassword))
+                        throw new AuthenticationException($"Failed '{methodName}' request.  IDrive Sync username and/or password were not provided. Server response: {response}");
+                }
+            }
+        }
+
+        private async Task UpdateSyncHostnameAsync()
+        {
+            // The API docs state that the sync web API server may change over time and must be retrieved on each login.
+            // The server may be different for different accounts, depending where the data is stored.
+            var responseNode = await GetSimpleTreeResponseAsync(IDRIVE_SYNC_GET_SERVER_ADDRESS_URL, "getServerAddress");
+
+            _syncHostname = responseNode.Attributes["webApiServer"]?.Value;
+
+            if (string.IsNullOrEmpty(_syncHostname))
+                throw new AuthenticationException($"Failed 'getServerAddress' request. Empty hostname. Tree XML: {responseNode.OuterXml}");
+        }
+
+        public async Task<List<FileEntry>> GetNodeListAsync(string directoryPath, string searchCriteria = "*")
+        {
+            const string methodName = "searchFiles";
+            string url = GetSyncServiceUrl(methodName);
+            var list = new List<FileEntry>();
+
+            using (var httpClient = GetHttpClient())
+            using (var content = GetSyncPostContent(new NameValueCollection { { "p", directoryPath }, { "searchkey", searchCriteria } }))
+            using (var response = await httpClient.PostAsync(url, content))
+            {
+                if (response.StatusCode != System.Net.HttpStatusCode.OK)
+                    throw new ApplicationException($"Failed '{methodName}' request. Server response: {response}");
+
+                using (var responseStream = await response.Content.ReadAsStreamAsync())
+                using (var xmlReader = XmlReader.Create(responseStream, new XmlReaderSettings() { Async = true }))
+                {
+                    bool success = false;
+                    while (await xmlReader.ReadAsync())
+                    {
+                        if (xmlReader.Name != XML_RESPONSE_TAG)
+                            continue;
+
+                        success = xmlReader.GetAttribute(MESSAGE_ATTRIBUTE) == SUCCESS;
+                        break;
+                    }
+
+                    if (!success)
+                        throw new ApplicationException($"Failed '{methodName}' request. Non-{SUCCESS}. Description: {xmlReader.GetAttribute("desc")}");
+
+                    while (await xmlReader.ReadAsync())
+                    {
+                        // Item XML example: <item restype="1" resname="Myoffice.txt" size="9583" lmd="2010/05/26 01:58:57" ver="1" thumb="N"/>
+                        if (xmlReader.Name != "item")
+                            continue;
+
+                        string resname = xmlReader.GetAttribute("resname");
+                        if (string.IsNullOrEmpty(resname))
+                            continue;
+
+                        string restype = xmlReader.GetAttribute("restype");
+                        string size = xmlReader.GetAttribute("size");
+                        string lmd = xmlReader.GetAttribute("lmd");
+
+                        long.TryParse(size, out long parsedSize);
+                        DateTime.TryParse(lmd, out DateTime parsedModificationDate);
+
+                        var fileEntry = new FileEntry(resname)
+                        {
+                            IsFolder = restype != "1",
+                            Name = resname,
+                            Size = parsedSize,
+                            LastModification = parsedModificationDate
+                        };
+
+                        list.Add(fileEntry);
+                    }
+                }
+            }
+
+            return list;
+        }
+
+        public async Task CreateDirectoryAsync(string directoryName, string baseDirectoryPath)
+        {
+            const string methodName = "createFolder";
+            string url = GetSyncServiceUrl(methodName);
+            try
+            {
+                await GetSimpleTreeResponseAsync(url, methodName, new NameValueCollection { { "p", baseDirectoryPath }, { "foldername", directoryName } });
+            }
+            catch (Exception ex)
+            {
+                if (ex.Message.Contains(@"FOLDER ALREADY EXISTS WITH THIS NAME."))
+                    return;
+
+                throw;
+            }
+        }
+
+        public async Task DeleteAsync(string filePath, bool moveToTrash = true)
+        {
+            const string methodName = "deleteFile";
+            string url = GetSyncServiceUrl(methodName);
+            await GetSimpleTreeResponseAsync(url, methodName, new NameValueCollection { { "p", filePath }, { "trash", moveToTrash ? "yes" : "no" } });
+        }
+
+        public async Task<FileEntry> UploadAsync(Stream stream, string filename, string directoryPath, CancellationToken cancelToken)
+        {
+            const string methodName = "uploadFile";
+            string url = GetSyncServiceUrl(methodName);
+
+            using (var httpClient = GetHttpClient())
+            using (var content = GetSyncPostContent(new NameValueCollection { { "p", directoryPath } }, isMultiPart: true))
+            {
+                ((MultipartFormDataContent)content).Add(new StreamContent(stream), filename, filename);
+
+                using (var response = await httpClient.PostAsync(url, content))
+                {
+                    if (response.StatusCode != System.Net.HttpStatusCode.OK)
+                        throw new ApplicationException($"Failed '{methodName}' request. Server response: {response}");
+
+                    string responseString = await response.Content.ReadAsStringAsync();
+                    var responseXml = new XmlDocument();
+                    responseXml.LoadXml(responseString);
+                    var nodes = responseXml.GetElementsByTagName(XML_RESPONSE_TAG);
+                    if (nodes.Count == 0)
+                        throw new ApplicationException($"Failed '{methodName}' request. Unexpected response. Server response: {response}");
+
+                    var responseNode = nodes[0];
+                    if (responseNode == null)
+                        throw new ApplicationException($"Failed '{methodName}' request. Missing {XML_RESPONSE_TAG} node. Server response: {response}");
+
+                    if (responseNode.Attributes[MESSAGE_ATTRIBUTE]?.Value != SUCCESS)
+                        throw new ApplicationException($"Failed '{methodName}' request. Non-{SUCCESS}. Description: {responseNode.Attributes["desc"]?.Value}");
+                }
+            }
+
+            var nodeList = await GetNodeListAsync(directoryPath, filename);
+            return nodeList.FirstOrDefault();
+        }
+
+        public async Task DownloadAsync(string filePath, Stream stream)
+        {
+            const string methodName = "downloadFile";
+            string url = GetSyncServiceUrl(methodName);
+
+            using (var httpClient = GetHttpClient())
+            using (var content = GetSyncPostContent(new NameValueCollection { { "p", filePath } }))
+            using (var response = await httpClient.PostAsync(url, content))
+            {
+                if (response.StatusCode != System.Net.HttpStatusCode.OK)
+                    throw new AuthenticationException($"Failed '{methodName}' request. Server response: {response}");
+
+                response.Headers.TryGetValues("RESTORE_STATUS", out var restoreStatus); // The download API uses RESTORE_STATUS to indicate success instead of body XML
+
+                using (var responseStream = await response.Content.ReadAsStreamAsync())
+                {
+                    if (restoreStatus.FirstOrDefault() == SUCCESS)
+                    {
+                        Library.Utility.Utility.CopyStream(responseStream, stream);
+                        return;
+                    }
+
+                    using (var xmlReader = XmlReader.Create(responseStream, new XmlReaderSettings() { Async = true }))
+                    {
+                        bool success = false;
+                        while (await xmlReader.ReadAsync())
+                        {
+                            if (xmlReader.Name != XML_RESPONSE_TAG)
+                                continue;
+
+                            success = xmlReader.GetAttribute(MESSAGE_ATTRIBUTE) == SUCCESS;
+                            break;
+                        }
+
+                        if (!success)
+                            throw new ApplicationException($"Failed '{methodName}' request. Non-{SUCCESS}. Description: {xmlReader.GetAttribute("desc")}");
+
+                        throw new ApplicationException($"Failed '{methodName}' request. Invalid RESTORE_STATUS result with invalid {SUCCESS} message."); // this should never happen
+                    }
+                }
+            }
+        }
+        private HttpClient GetHttpClient()
+        {
+            var httpClient = new HttpClient();
+
+            if (!string.IsNullOrEmpty(UserAgent))
+                httpClient.DefaultRequestHeaders.Add("User-Agent", UserAgent);
+
+            return httpClient;
+        }
+
+        private string GetSyncServiceUrl(string serviceName)
+        {
+            return $"https://{_syncHostname}/evs/{serviceName}";
+        }
+
+        private async Task<XmlNode> GetSimpleTreeResponseAsync(string url, string methodName, NameValueCollection parameters = null)
+        {
+            using (var httpClient = GetHttpClient())
+            using (var content = GetSyncPostContent(parameters))
+            using (var response = await httpClient.PostAsync(url, content))
+            {
+                if (response.StatusCode != System.Net.HttpStatusCode.OK)
+                    throw new ApplicationException($"Failed '{methodName}' request. Server response: {response}");
+
+                // Sample response: "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<tree message=\"SUCCESS\" cmdUtilityServer=\"evs19.idrivesync.com\"\n    cmdUtilityServerIP=\"4.71.135.136\"\n    webApiServer=\"evsweb19.idrivesync.com\" webApiServerIP=\"4.71.135.137\"\n    faceWebApiServer=\"\" faceWebApiServerIP=\"\" dedup=\"off\"/>\n"
+                string responseString = await response.Content.ReadAsStringAsync();
+                var responseXml = new XmlDocument();
+                responseXml.LoadXml(responseString);
+                var nodes = responseXml.GetElementsByTagName(XML_RESPONSE_TAG);
+                if (nodes.Count == 0)
+                    throw new ApplicationException($"Failed '{methodName}' request. Unexpected response. Server response: {response}");
+
+                var responseNode = nodes[0];
+                if (responseNode == null)
+                    throw new ApplicationException($"Failed '{methodName}' request. Missing {XML_RESPONSE_TAG} node. Server response: {response}");
+
+                if (responseNode.Attributes[MESSAGE_ATTRIBUTE]?.Value != SUCCESS)
+                    throw new ApplicationException($"Failed '{methodName}' request. Non-{SUCCESS}. Description: {responseNode.Attributes["desc"]?.Value}");
+
+                return responseNode;
+            }
+        }
+
+        private HttpContent GetSyncPostContent(NameValueCollection parameters = null, bool isMultiPart = false)
+        {
+            var allParameters = new List<KeyValuePair<string, string>>()
+            {
+                new KeyValuePair<string, string> ( "uid", _syncUsername),
+                new KeyValuePair<string, string> ( "pwd", _syncPassword)
+            };
+
+            if (parameters != null)
+            {
+                foreach (string key in parameters.Keys)
+                {
+                    allParameters.Add(new KeyValuePair<string, string>(key, parameters[key]));
+                }
+            }
+
+            if (!isMultiPart)
+                return new FormUrlEncodedContent(allParameters);
+
+            var content = new MultipartFormDataContent(Guid.NewGuid().ToString());
+            foreach (var parameter in allParameters)
+            {
+                content.Add(new StringContent(parameter.Value, Encoding.UTF8), parameter.Key);
+            }
+
+            return content;
+        }
+    }
+}
diff --git a/Duplicati/Library/Backend/IDrive/IDriveBackend.cs b/Duplicati/Library/Backend/IDrive/IDriveBackend.cs
new file mode 100644
index 000000000..e3c5383da
--- /dev/null
+++ b/Duplicati/Library/Backend/IDrive/IDriveBackend.cs
@@ -0,0 +1,215 @@
+//  Copyright (C) 2015, The Duplicati Team
+//  http://www.duplicati.com, info@duplicati.com
+//
+//  This library is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU Lesser General Public License as
+//  published by the Free Software Foundation; either version 2.1 of the
+//  License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful, but
+//  WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+using Duplicati.Library.Common.IO;
+using Duplicati.Library.Interface;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Duplicati.Library.Backend.IDrive
+{
+    // ReSharper disable once UnusedMember.Global
+    // This class is instantiated dynamically in the BackendLoader.
+    public class IDriveBackend : IBackend, IStreamingBackend
+    {
+        private readonly string _username = null;
+        private readonly string _password = null;
+        private readonly string _baseDirectoryPath = null;
+        public string DisplayName => Strings.IDriveBackend.DisplayName;
+        public string Description => Strings.IDriveBackend.Description;
+        public string[] DNSName => null;
+        public string ProtocolKey => "idrive";
+
+        public IList<ICommandLineArgument> SupportedCommands
+        {
+            get
+            {
+                return new List<ICommandLineArgument>(new ICommandLineArgument[] {
+                    new CommandLineArgument("auth-password", CommandLineArgument.ArgumentType.Password, Strings.IDriveBackend.AuthPasswordDescriptionShort, Strings.IDriveBackend.AuthPasswordDescriptionLong),
+                    new CommandLineArgument("auth-username", CommandLineArgument.ArgumentType.String, Strings.IDriveBackend.AuthUsernameDescriptionShort, Strings.IDriveBackend.AuthUsernameDescriptionLong)
+                });
+            }
+        }
+
+        private Dictionary<string, FileEntry> _fileCache;
+        protected Dictionary<string, FileEntry> FileCache
+        {
+            get
+            {
+                if (_fileCache == null)
+                    ResetFileCacheAsync().Wait();
+
+                return _fileCache;
+            }
+            set
+            {
+                _fileCache = value;
+            }
+        }
+
+        private IDriveApiClient _client;
+        protected IDriveApiClient Client
+        {
+            get
+            {
+                if (_client == null)
+                {
+                    var cl = new IDriveApiClient();
+                    cl.LoginAsync(_username, _password).Wait();
+                    _client = cl;
+                }
+
+                return _client;
+            }
+        }
+
+        public IDriveBackend()
+        {
+        }
+
+        public IDriveBackend(string url, Dictionary<string, string> options)
+        {
+            var uri = new Utility.Uri(url); // Sample url: idrive://Directory1/SubDirectory1?auth-username=MyUsername&auth-password=MyPassword
+            _username = uri.Username;
+            _password = uri.Password;
+
+            if (string.IsNullOrEmpty(_username) && options.TryGetValue("auth-username", out string username))
+                _username = username;
+            if (string.IsNullOrEmpty(_password) && options.TryGetValue("auth-password", out string password))
+                _password = password;
+
+            if (string.IsNullOrEmpty(_username))
+                throw new UserInformationException(Strings.IDriveBackend.NoUsernameError, "IDriveNoUsername");
+            if (string.IsNullOrEmpty(_password))
+                throw new UserInformationException(Strings.IDriveBackend.NoPasswordError, "IDriveNoPassword");
+
+            _baseDirectoryPath = ("/" + (uri.HostAndPath ?? "").Trim('/') + "/").Replace("//", "/");
+        }
+
+        private async Task ResetFileCacheAsync()
+        {
+            FileCache = (await Client.GetNodeListAsync(_baseDirectoryPath))
+                .Where(x => !x.IsFolder)
+                .ToDictionary(x => x.Name, x => x);
+        }
+
+        public IEnumerable<IFileEntry> List()
+        {
+            return FileCache.Values;
+        }
+
+        public void Get(string filename, string localFilePath)
+        {
+            using (var fileStream = File.Create(localFilePath))
+                Get(filename, fileStream);
+        }
+
+        public void Get(string filename, Stream stream)
+        {
+            Client.DownloadAsync(Path.Combine(_baseDirectoryPath, filename), stream).Wait();
+        }
+
+        public async Task PutAsync(string filename, string localFilePath, CancellationToken cancelToken)
+        {
+            using (var fileStream = File.OpenRead(localFilePath))
+                await PutAsync(filename, fileStream, cancelToken);
+        }
+
+        public async Task PutAsync(string filename, Stream stream, CancellationToken cancelToken)
+        {
+            try
+            {
+                if (FileCache.ContainsKey(filename))
+                    Delete(filename);
+
+                var fileNode = await Client.UploadAsync(stream, filename, _baseDirectoryPath, cancelToken);
+                FileCache[filename] = fileNode;
+            }
+            catch
+            {
+                FileCache = null;
+                throw;
+            }
+        }
+
+        public void Delete(string filename)
+        {
+            try
+            {
+                if (!FileCache.ContainsKey(filename))
+                {
+                    ResetFileCacheAsync().Wait();
+
+                    if (!FileCache.ContainsKey(filename))
+                        throw new FileMissingException();
+                }
+
+                Client.DeleteAsync(_baseDirectoryPath + filename, false).Wait();
+
+                FileCache.Remove(filename);
+            }
+            catch
+            {
+                FileCache = null;
+                throw;
+            }
+        }
+
+        public void CreateFolder()
+        {
+            var directoryParts = _baseDirectoryPath.Split('/').Where(d => !string.IsNullOrEmpty(d));
+            string baseDirectory = "/";
+
+            foreach (string directoryPart in directoryParts)
+            {
+                Client.CreateDirectoryAsync(directoryPart, baseDirectory).Wait();
+                baseDirectory += directoryPart + "/";
+            }
+        }
+
+        public void Test()
+        {
+            this.TestList();
+        }
+
+        #region IDisposable Support
+        private bool _disposedValue = false; // To detect redundant calls
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (!_disposedValue)
+            {
+                if (disposing)
+                {
+                }
+
+                _disposedValue = true;
+            }
+        }
+
+        // This code added to correctly implement the disposable pattern.
+        public void Dispose()
+        {
+            // Do not change this code. Put cleanup code in Dispose(bool disposing) above.
+            Dispose(true);
+        }
+        #endregion
+    }
+}
diff --git a/Duplicati/Library/Backend/IDrive/Properties/AssemblyInfo.cs b/Duplicati/Library/Backend/IDrive/Properties/AssemblyInfo.cs
new file mode 100644
index 000000000..80c373101
--- /dev/null
+++ b/Duplicati/Library/Backend/IDrive/Properties/AssemblyInfo.cs
@@ -0,0 +1,43 @@
+//  Copyright (C) 2022, The Duplicati Team
+//  http://www.duplicati.com, info@duplicati.com
+//
+//  This library is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU Lesser General Public License as
+//  published by the Free Software Foundation; either version 2.1 of the
+//  License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful, but
+//  WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+using System.Reflection;
+using System.Runtime.CompilerServices;
+
+// Information about this assembly is defined by the following attributes.
+// Change them to the values specific to your project.
+
+[assembly: AssemblyTitle("Duplicati.Library.Backend.IDrive")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("")]
+[assembly: AssemblyCopyright("Doug Krahmer")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}".
+// The form "{Major}.{Minor}.*" will automatically update the build and revision,
+// and "{Major}.{Minor}.{Build}.*" will update just the revision.
+
+[assembly: AssemblyVersion("2.0.0.1")]
+
+// The following attributes are used to specify the signing key for the assembly,
+// if desired. See the Mono documentation for more information about signing.
+
+//[assembly: AssemblyDelaySign(false)]
+//[assembly: AssemblyKeyFile("")]
+
diff --git a/Duplicati/Library/Backend/IDrive/Strings.cs b/Duplicati/Library/Backend/IDrive/Strings.cs
new file mode 100644
index 000000000..9bb775e29
--- /dev/null
+++ b/Duplicati/Library/Backend/IDrive/Strings.cs
@@ -0,0 +1,18 @@
+using Duplicati.Library.Localization.Short;
+
+namespace Duplicati.Library.Backend.Strings
+{
+    internal static class IDriveBackend
+    {
+        public static string DisplayName { get { return LC.L(@"IDrive"); } }
+        public static string AuthPasswordDescriptionLong { get { return LC.L(@"The password used to connect to the server. This may also be supplied as the environment variable ""AUTH_PASSWORD""."); } }
+        public static string AuthPasswordDescriptionShort { get { return LC.L(@"Supplies the password used to connect to the server"); } }
+        public static string AuthUsernameDescriptionLong { get { return LC.L(@"The username used to connect to the server. This may also be supplied as the environment variable ""AUTH_USERNAME""."); } }
+        public static string AuthUsernameDescriptionShort { get { return LC.L(@"Supplies the username used to connect to the server"); } }
+        public static string AuthTwoFactorKeyDescriptionShort { get { return LC.L(@"The shared secret used to generate two-factor TOTP codes."); } }
+        public static string AuthTwoFactorKeyDescriptionLong { get { return LC.L(@"For accounts with two-factor authentication enabled, this is the shared secret used to generate the two-factor TOTP codes."); } }
+        public static string NoPasswordError { get { return LC.L(@"No password given"); } }
+        public static string NoUsernameError { get { return LC.L(@"No username given"); } }
+        public static string Description { get { return LC.L(@"This backend can read and write data to IDrive Sync. Allowed formats are: ""idrive://folder/subfolder"""); } }
+    }
+}
\ No newline at end of file
diff --git a/Duplicati/Library/Backend/IDrive/app.config b/Duplicati/Library/Backend/IDrive/app.config
new file mode 100644
index 000000000..ad53561b2
--- /dev/null
+++ b/Duplicati/Library/Backend/IDrive/app.config
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <startup>
+    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.1" />
+  </startup>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+    </assemblyBinding>
+  </runtime>
+</configuration>
diff --git a/Duplicati/Server/webroot/ngax/scripts/services/EditUriBuiltins.js b/Duplicati/Server/webroot/ngax/scripts/services/EditUriBuiltins.js
index 63a94b64d..8a103104e 100644
--- a/Duplicati/Server/webroot/ngax/scripts/services/EditUriBuiltins.js
+++ b/Duplicati/Server/webroot/ngax/scripts/services/EditUriBuiltins.js
@@ -25,6 +25,7 @@ backupApp.service('EditUriBuiltins', function (AppService, AppUtils, SystemInfo,
     EditUriBackendConfig.templates['gcs']         = 'templates/backends/gcs.html';
     EditUriBackendConfig.templates['b2']          = 'templates/backends/b2.html';
     EditUriBackendConfig.templates['mega']        = 'templates/backends/mega.html';
+    EditUriBackendConfig.templates['idrive']      = 'templates/backends/idrive.html';
     EditUriBackendConfig.templates['jottacloud']  = 'templates/backends/jottacloud.html';
     EditUriBackendConfig.templates['box']         = 'templates/backends/oauth.html';
     EditUriBackendConfig.templates['dropbox'] = 'templates/backends/oauth.html';
diff --git a/Duplicati/Server/webroot/ngax/scripts/services/SystemInfo.js b/Duplicati/Server/webroot/ngax/scripts/services/SystemInfo.js
index b6b4e4e52..a05af144a 100644
--- a/Duplicati/Server/webroot/ngax/scripts/services/SystemInfo.js
+++ b/Duplicati/Server/webroot/ngax/scripts/services/SystemInfo.js
@@ -66,6 +66,7 @@ backupApp.service('SystemInfo', function($rootScope, $timeout, $cookies, AppServ
                 'hubic': null,
                 'b2': null,
                 'mega': null,
+                'idrive': null,
                 'box': null,
                 'od4b': null,
                 'mssp': null,
diff --git a/Duplicati/Server/webroot/ngax/templates/backends/idrive.html b/Duplicati/Server/webroot/ngax/templates/backends/idrive.html
new file mode 100644
index 000000000..1a5973341
--- /dev/null
+++ b/Duplicati/Server/webroot/ngax/templates/backends/idrive.html
@@ -0,0 +1,13 @@
+<div class="input text">
+    <label for="idrive_path" translate>IDrive Sync directory path</label>
+    <input type="text" name="idrive_path" id="idrive_path" ng-model="$parent.Path" placeholder="{{'Enter directory path' | translate}}" />
+</div>
+
+<div class="input text">
+    <label for="idrive_username" translate>Username</label>
+    <input type="text" name="idrive_username" id="idrive_username" ng-model="$parent.Username" placeholder="{{'Username' | translate}}" />
+</div>
+<div class="input password">
+    <label for="idrive_password" translate>Password</label>
+    <input autocomplete="new-password" type="password" name="idrive_password" id="idrive_password" ng-model="$parent.Password" placeholder="{{'Password' | translate}}" />
+</div>