Bug 19757: Support on-disk storage of v3 client auth keys

Create a client-auth directory within the Tor data directory and use it.

src/components/tl-process.js

-// Copyright (c) 2018, The Tor Project, Inc.
+// Copyright (c) 2020, The Tor Project, Inc.
 // See LICENSE for licensing information.
 //
 // vim: set sw=2 sts=2 ts=8 et syntax=javascript:
@@ -372,6 +372,7 @@ TorProcessService.prototype =
       // Get the Tor data directory first so it is created before we try to
       // construct paths to files that will be inside it.
       var dataDir = TorLauncherUtil.getTorFile("tordatadir", true);
+      var onionAuthDir = TorLauncherUtil.getTorFile("toronionauthdir", true);
       var exeFile = TorLauncherUtil.getTorFile("tor", false);
       var torrcFile = TorLauncherUtil.getTorFile("torrc", true);
       var torrcDefaultsFile =
@@ -388,6 +389,8 @@ TorProcessService.prototype =
         detailsKey = "torrc_missing";
       else if (!dataDir)
         detailsKey = "datadir_missing";
+      else if (!onionAuthDir)
+        detailsKey = "onionauthdir_missing";
       else if (!hashedPassword)
         detailsKey = "password_hash_missing";
 
@@ -418,6 +421,8 @@ TorProcessService.prototype =
       args.push(torrcFile.path);
       args.push("DataDirectory");
       args.push(dataDir.path);
+      args.push("ClientOnionAuthDir");
+      args.push(onionAuthDir.path);
       args.push("GeoIPFile");
       args.push(geoipFile.path);
       args.push("GeoIPv6File");

src/modules/tl-util.jsm

-// Copyright (c) 2019, The Tor Project, Inc.
+// Copyright (c) 2020, The Tor Project, Inc.
 // See LICENSE for licensing information.
 //
 // vim: set sw=2 sts=2 ts=8 et syntax=javascript:
@@ -571,6 +571,8 @@ let TorLauncherUtil =  // Public
             path = "Tor\\torrc";
           else if ("tordatadir" == aTorFileType)
             path = "Tor";
+          else if ("toronionauthdir" == aTorFileType)
+            path = "Tor\\onion-auth";
           else if ("pt-profiles-dir" == aTorFileType)
             path = "Tor\\PluggableTransports";
         }
@@ -586,6 +588,8 @@ let TorLauncherUtil =  // Public
             path = "Tor/torrc";
           else if ("tordatadir" == aTorFileType)
             path = "Tor";
+          else if ("toronionauthdir" == aTorFileType)
+            path = "Tor/onion-auth";
           else if ("pt-profiles-dir" == aTorFileType)
             path = "Tor/PluggableTransports";
           else if (isIPC)
@@ -603,6 +607,8 @@ let TorLauncherUtil =  // Public
             path = "Tor/torrc";
           else if ("tordatadir" == aTorFileType)
             path = "Tor";
+          else if ("toronionauthdir" == aTorFileType)
+            path = "Tor/onion-auth";
           else if ("pt-profiles-dir" == aTorFileType)
             path = "Tor/PluggableTransports";
           else if (isIPC)
@@ -622,6 +628,8 @@ let TorLauncherUtil =  // Public
           path = "Data\\Tor\\torrc";
         else if ("tordatadir" == aTorFileType)
           path = "Data\\Tor";
+        else if ("toronionauthdir" == aTorFileType)
+          path = "Data\\Tor\\onion-auth";
         else if ("pt-profiles-dir" == aTorFileType)
           path = "Data\\Browser";
         }
@@ -638,6 +646,8 @@ let TorLauncherUtil =  // Public
           path = "Data/Tor/torrc";
         else if ("tordatadir" == aTorFileType)
           path = "Data/Tor";
+        else if ("toronionauthdir" == aTorFileType)
+          path = "Data/Tor/onion-auth";
         else if ("pt-profiles-dir" == aTorFileType)
           path = "Data/Browser";
         else if (isIPC)
@@ -683,6 +693,7 @@ let TorLauncherUtil =  // Public
           try
           {
             if (("tordatadir" == aTorFileType) ||
+                ("toronionauthdir" == aTorFileType) ||
                 ("pt-profiles-dir" == aTorFileType))
             {
               torFile.create(torFile.DIRECTORY_TYPE, 0o700);