146 lines
3.5 KiB
C++
146 lines
3.5 KiB
C++
/*
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* Copyright 2003-2021 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 "util/IterableSplitString.hxx"
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#include "util/RuntimeError.hxx"
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#include "util/StringView.hxx"
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#include <cassert>
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#include <cstring>
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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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{ "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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static unsigned
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ParsePermission(StringView s)
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{
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for (auto i = permission_names; i->name != nullptr; ++i)
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if (s.Equals(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 parsePermissions(const char *string)
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{
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assert(string != nullptr);
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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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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_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 char *value){
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const char *separator = std::strchr(value,
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PERMISSION_PASSWORD_CHAR);
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if (separator == nullptr)
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throw FormatRuntimeError("\"%c\" not found in password string",
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PERMISSION_PASSWORD_CHAR);
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std::string password(value, separator);
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unsigned permission = parsePermissions(separator + 1);
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permission_passwords.insert(std::make_pair(std::move(password),
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permission));
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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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}
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int
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getPermissionFromPassword(const char *password, unsigned *permission) 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 -1;
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*permission = i->second;
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return 0;
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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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