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/*
Copyright (C) 2024 Selwin van Dijk
This file is part of signalbackup-tools.
signalbackup-tools is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
signalbackup-tools 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with signalbackup-tools. If not, see <https://www.gnu.org/licenses/>.
*/
#if !defined(_WIN32) && !defined(__MINGW64__) && (!defined(__APPLE__) || !defined(__MACH__))
#if defined WITHOUT_DBUS
#include "desktopdatabase.ih"
void DesktopDatabase::getSecrets_linux_SecretService(std::set<std::string> */*secrets*/) const
{
Logger::error ("Found encrypted sqlcipher key in config file. To decrypt this key");
Logger::error_indent("a secret must be retrieved from your keyring through dbus, but");
Logger::error_indent("this program was explicitly compiled without dbus.");
return;
}
#else
#include "desktopdatabase.ih"
#include "../dbuscon/dbuscon.h"
void DesktopDatabase::getSecrets_linux_SecretService(std::set<std::string> *secrets) const
{
if (d_dbus_verbose) [[unlikely]]
Logger::message("Getting secret from SecretService through DBUS");
if (!secrets)
return;
DBusCon dbuscon(d_dbus_verbose);
if (!dbuscon.ok())
{
Logger::error("Failed to connect to dbus session");
return;
}
/* OPEN SESSION */
if (d_dbus_verbose) Logger::message("[OpenSession]");
dbuscon.callMethod("org.freedesktop.secrets",
"/org/freedesktop/secrets",
"org.freedesktop.Secret.Service",
"OpenSession",
{"plain",
DBusVariant{""}});
std::string session_objectpath = dbuscon.get<std::string>("vo", 1);
if (session_objectpath.empty())
{
Logger::error("Failed to get session");
return;
}
if (d_dbus_verbose) Logger::message(" *** Session: ", session_objectpath);
// if constexpr (false)
// {
// /* SEARCHITEMS */
// // note searching is of no use on KDE, the secret does not seem to have any attributes set.
// // so lets just get all items and inspect them
// Logger::message("[SearchItems(label:Chromium Keys/Chromium Safe Storage)]");
// dbuscon.callMethod("org.freedesktop.secrets",
// "/org/freedesktop/secrets",
// "org.freedesktop.Secret.Service",
// "SearchItems",
// {DBusDict{{"org.freedesktop.Secret.Collection.Label", "Chromium Keys/Chromium Safe Storage"},
// {"Label", "Chromium Keys/Chromium Safe Storage"}}});
// }
// if constexpr (false)
// {
// /* GET DEFAULT COLLECTION */
// // not necessary we can address the default directly (without knowing what it points to), through
// // the aliases/default path...
// Logger::message("[ReadAlias(default)]");
// dbuscon.callMethod("org.freedesktop.secrets",
// "/org/freedesktop/secrets",
// "org.freedesktop.Secret.Service",
// "ReadAlias",
// {"default"});
// }
/* UNLOCK THE DEFAULT COLLECTION */
if (d_dbus_verbose) Logger::message("[Unlock]");
dbuscon.callMethod("org.freedesktop.secrets",
"/org/freedesktop/secrets",
"org.freedesktop.Secret.Service",
"Unlock",
std::vector<DBusArg>{DBusArray{DBusObjectPath{"/org/freedesktop/secrets/aliases/default"}}});
// This returns an array of already unlocked object paths (out of the input ones) and a prompt to unlock any locked ones.
// if no collections need unlocking, the prompt is '/';
std::string prompt = dbuscon.get<std::string>("aoo", 1);
if (prompt.empty())
{
Logger::error("Error getting prompt");
return;
}
if (d_dbus_verbose) Logger::message(" *** Prompt: ", prompt);
bool unlocked_by_us = false;
if (prompt != "/")
{
/* REGISTER FOR SIGNAL */
if (!dbuscon.matchSignal("member='Completed'"))
Logger::message("WARN: Failed to register for prompt signal");
/* PROMPT FOR UNLOCK */
if (d_dbus_verbose) Logger::message("[Prompt]");
dbuscon.callMethod("org.freedesktop.secrets",
prompt.c_str(),
"org.freedesktop.Secret.Prompt",
"Prompt",
{""}); // 'Platform specific window handle to use for showing the prompt.'
/* WAIT FOR PROMPT COMPLETED SIGNAL */
// note, we will not even check the signal contents (dismissed/result), since we check if we're
// unlocked next anyway...
if (!dbuscon.waitSignal(20, 2500, "org.freedesktop.Secret.Prompt", "Completed"))
if (d_dbus_verbose) Logger::error("Failed to wait for unlock prompt...");
unlocked_by_us = true;
}
/* CHECK COLLECTION IS UNLOCKED NOW */
dbuscon.callMethod("org.freedesktop.secrets",
"/org/freedesktop/secrets/aliases/default",
"org.freedesktop.DBus.Properties",
"Get",
{"org.freedesktop.Secret.Collection", "Locked"});
bool islocked = dbuscon.get<bool>("v", 0, true);
if (islocked)
{
Logger::error("Failed to unlock collection");
return;
}
/* GET ITEMS */
if (d_dbus_verbose) Logger::message("[GetItems]");
dbuscon.callMethod("org.freedesktop.secrets",
"/org/freedesktop/secrets/aliases/default",
"org.freedesktop.DBus.Properties",
"Get",
{"org.freedesktop.Secret.Collection", "Items"});
std::vector<std::string> items = dbuscon.get<std::vector<std::string>>("v", 0);
if (items.empty())
{
Logger::error("Failed to get any items");
return;
}
else
if (d_dbus_verbose) Logger::message("Got ", items.size(), " items to check");
for (auto const &item : items)
{
// check label
dbuscon.callMethod("org.freedesktop.secrets",
item.c_str(),
"org.freedesktop.DBus.Properties",
"Get",
{"org.freedesktop.Secret.Item", "Label"});
std::string label = dbuscon.get<std::string>("v", 0);
if (d_dbus_verbose) Logger::message(" *** Label: ", label);
#if __cpp_lib_string_contains >= 202011L
if ((label.contains("Chrome") || label.contains("Chromium")) &&
(label.contains("Safe Storage") || label.contains("Keys")) &&
(!label.contains("Control")))
#else
if ((label.find("Chrome") != std::string::npos || label.find("Chromium") != std::string::npos) &&
(label.find("Safe Storage") != std::string::npos || label.find("Keys") != std::string::npos) &&
(label.find("Control") == std::string::npos))
#endif
{
/* GET SECRETS */
if (d_dbus_verbose) Logger::message("[GetSecret]");
dbuscon.callMethod("org.freedesktop.secrets",
item,
"org.freedesktop.Secret.Item",
"GetSecret",
{DBusObjectPath{session_objectpath}});
/*
The secret returned by SecretService is a struct:
struct Secret {
ObjectPath session ;
Array<Byte> parameters ;
Array<Byte> value ;
String content_type ;
};
A struct has signature (oayays), the brackets meaning 'struct'. we want the 'value' (the second ay);
*/
std::vector<unsigned char> secret_bytes = dbuscon.get<std::vector<unsigned char>>("(oayays)", {0, 2});
// Since the secret is always 16 bytes, in base64 encoding,
// its length must be [16/3]*4 + two '=' padding.
if (secret_bytes.size() != 24 ||
secret_bytes[23] != '=' ||
secret_bytes[22] != '=')
{
if (d_dbus_verbose) [[unlikely]] Logger::message("Retrieved data is not a valid secret");
continue;
}
if (d_dbus_verbose) [[unlikely]]
Logger::message(" *** SECRET: ", Logger::VECTOR(secret_bytes));
secrets->emplace(std::string{secret_bytes.begin(), secret_bytes.end()});
}
}
/* LOCK COLLECTION */
if (unlocked_by_us)
{
if (d_dbus_verbose) Logger::message("[Lock]");
dbuscon.callMethod("org.freedesktop.secrets",
"/org/freedesktop/secrets",
"org.freedesktop.Secret.Service",
"Lock",
std::vector<DBusArg>{DBusArray{DBusObjectPath{"/org/freedesktop/secrets/aliases/default"}}});
}
/* CLOSE SESSION */
if (d_dbus_verbose) Logger::message("[Close]");
dbuscon.callMethod("org.freedesktop.secrets",
session_objectpath.c_str(), //"/org/freedesktop/secrets",
"org.freedesktop.Secret.Session",
"Close");
}
#endif
#endif
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