185 lines
4.4 KiB
C++
185 lines
4.4 KiB
C++
/*
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* Copyright 2003-2022 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "Permission.hxx"
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#include "config/Param.hxx"
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#include "config/Data.hxx"
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#include "config/Option.hxx"
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#include "net/AddressInfo.hxx"
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#include "net/Resolver.hxx"
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#include "net/ToString.hxx"
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#include "util/IterableSplitString.hxx"
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#include "util/RuntimeError.hxx"
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#include "util/StringSplit.hxx"
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#include <cassert>
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#include <map>
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#include <string>
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#include <utility>
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static constexpr char PERMISSION_PASSWORD_CHAR = '@';
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static constexpr char PERMISSION_SEPARATOR = ',';
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static constexpr struct {
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const char *name;
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unsigned value;
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} permission_names[] = {
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{ "read", PERMISSION_READ },
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{ "add", PERMISSION_ADD },
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{ "player", PERMISSION_PLAYER },
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{ "control", PERMISSION_CONTROL },
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{ "admin", PERMISSION_ADMIN },
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{ nullptr, 0 },
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};
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static std::map<std::string, unsigned> permission_passwords;
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static unsigned permission_default;
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#ifdef HAVE_UN
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static unsigned local_permissions;
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#endif
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#ifdef HAVE_TCP
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static std::map<std::string, unsigned> host_passwords;
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#endif
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static unsigned
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ParsePermission(std::string_view s)
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{
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for (auto i = permission_names; i->name != nullptr; ++i)
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if (s == i->name)
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return i->value;
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throw FormatRuntimeError("unknown permission \"%.*s\"",
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int(s.size()), s.data());
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}
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static unsigned
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parsePermissions(std::string_view string)
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{
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unsigned permission = 0;
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for (const auto i : IterableSplitString(string, PERMISSION_SEPARATOR))
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if (!i.empty())
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permission |= ParsePermission(i);
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/* for backwards compatiblity with MPD 0.22 and older,
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"control" implies "play" */
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if (permission & PERMISSION_CONTROL)
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permission |= PERMISSION_PLAYER;
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return permission;
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}
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void
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initPermissions(const ConfigData &config)
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{
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permission_default = PERMISSION_READ | PERMISSION_ADD |
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PERMISSION_PLAYER |
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PERMISSION_CONTROL | PERMISSION_ADMIN;
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for (const auto ¶m : config.GetParamList(ConfigOption::PASSWORD)) {
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permission_default = 0;
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param.With([](const std::string_view value){
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const auto [password, permissions] =
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Split(value, PERMISSION_PASSWORD_CHAR);
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if (permissions.data() == nullptr)
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throw FormatRuntimeError("\"%c\" not found in password string",
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PERMISSION_PASSWORD_CHAR);
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permission_passwords.emplace(password,
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parsePermissions(permissions));
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});
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}
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config.With(ConfigOption::DEFAULT_PERMS, [](const char *value){
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if (value != nullptr)
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permission_default = parsePermissions(value);
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});
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#ifdef HAVE_UN
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local_permissions = config.With(ConfigOption::LOCAL_PERMISSIONS, [](const char *value){
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return value != nullptr
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? parsePermissions(value)
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: permission_default;
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});
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#endif
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#ifdef HAVE_TCP
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for (const auto ¶m : config.GetParamList(ConfigOption::HOST_PERMISSIONS)) {
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permission_default = 0;
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param.With([](std::string_view value){
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auto [host_sv, permissions_s] = Split(value, ' ');
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unsigned permissions = parsePermissions(permissions_s);
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const std::string host_s{host_sv};
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for (const auto &i : Resolve(host_s.c_str(), 0,
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AI_PASSIVE, SOCK_STREAM))
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host_passwords.emplace(HostToString(i),
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permissions);
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});
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}
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#endif
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}
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#ifdef HAVE_TCP
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int
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GetPermissionsFromAddress(SocketAddress address) noexcept
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{
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if (auto i = host_passwords.find(HostToString(address));
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i != host_passwords.end())
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return i->second;
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return -1;
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}
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#endif
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std::optional<unsigned>
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GetPermissionFromPassword(const char *password) noexcept
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{
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auto i = permission_passwords.find(password);
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if (i == permission_passwords.end())
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return std::nullopt;
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return i->second;
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}
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unsigned
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getDefaultPermissions() noexcept
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{
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return permission_default;
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}
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#ifdef HAVE_UN
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unsigned
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GetLocalPermissions() noexcept
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{
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return local_permissions;
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}
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#endif
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