158 lines
3.7 KiB
C++
158 lines
3.7 KiB
C++
/*
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* Copyright 2003-2017 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/RuntimeError.hxx"
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#include <algorithm>
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#include <map>
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#include <string>
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#include <assert.h>
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#include <string.h>
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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(const char *p)
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{
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for (auto i = permission_names; i->name != nullptr; ++i)
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if (strcmp(p, i->name) == 0)
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return i->value;
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throw FormatRuntimeError("unknown permission \"%s\"", p);
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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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const char *const end = string + strlen(string);
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unsigned permission = 0;
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while (true) {
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const char *comma = std::find(string, end,
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PERMISSION_SEPARATOR);
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if (comma > string) {
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const std::string name(string, comma);
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permission |= ParsePermission(name.c_str());
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}
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if (comma == end)
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break;
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string = comma + 1;
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}
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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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unsigned permission;
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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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const char *separator = strchr(param.value.c_str(),
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PERMISSION_PASSWORD_CHAR);
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if (separator == NULL)
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throw FormatRuntimeError("\"%c\" not found in password string "
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"\"%s\", line %i",
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PERMISSION_PASSWORD_CHAR,
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param.value.c_str(),
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param.line);
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std::string password(param.value.c_str(), separator);
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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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const ConfigParam *param;
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param = config.GetParam(ConfigOption::DEFAULT_PERMS);
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if (param)
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permission_default = parsePermissions(param->value.c_str());
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#ifdef HAVE_UN
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param = config.GetParam(ConfigOption::LOCAL_PERMISSIONS);
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if (param != nullptr)
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local_permissions = parsePermissions(param->value.c_str());
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else
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local_permissions = permission_default;
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#endif
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}
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int getPermissionFromPassword(char const* password, unsigned* permission)
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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 getDefaultPermissions(void)
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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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