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/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "Permission.hxx"
#include "config/Param.hxx"
#include "config/Data.hxx"
#include "config/Option.hxx"
#include "util/RuntimeError.hxx"
#include <algorithm>
#include <map>
#include <string>
#include <assert.h>
#include <string.h>
static constexpr char PERMISSION_PASSWORD_CHAR = '@';
static constexpr char PERMISSION_SEPARATOR = ',';
static constexpr struct {
const char *name;
unsigned value;
} permission_names[] = {
{ "read", PERMISSION_READ },
{ "add", PERMISSION_ADD },
{ "control", PERMISSION_CONTROL },
{ "admin", PERMISSION_ADMIN },
{ nullptr, 0 },
};
static std::map<std::string, unsigned> permission_passwords;
static unsigned permission_default;
#ifdef HAVE_UN
static unsigned local_permissions;
#endif
static unsigned
ParsePermission(const char *p)
{
for (auto i = permission_names; i->name != nullptr; ++i)
if (strcmp(p, i->name) == 0)
return i->value;
throw FormatRuntimeError("unknown permission \"%s\"", p);
}
static unsigned parsePermissions(const char *string)
{
assert(string != nullptr);
const char *const end = string + strlen(string);
unsigned permission = 0;
while (true) {
const char *comma = std::find(string, end,
PERMISSION_SEPARATOR);
if (comma > string) {
const std::string name(string, comma);
permission |= ParsePermission(name.c_str());
}
if (comma == end)
break;
string = comma + 1;
}
return permission;
}
void
initPermissions(const ConfigData &config)
{
unsigned permission;
permission_default = PERMISSION_READ | PERMISSION_ADD |
PERMISSION_CONTROL | PERMISSION_ADMIN;
for (const auto ¶m : config.GetParamList(ConfigOption::PASSWORD)) {
permission_default = 0;
const char *separator = strchr(param.value.c_str(),
PERMISSION_PASSWORD_CHAR);
if (separator == NULL)
throw FormatRuntimeError("\"%c\" not found in password string "
"\"%s\", line %i",
PERMISSION_PASSWORD_CHAR,
param.value.c_str(),
param.line);
std::string password(param.value.c_str(), separator);
permission = parsePermissions(separator + 1);
permission_passwords.insert(std::make_pair(std::move(password),
permission));
}
const ConfigParam *param;
param = config.GetParam(ConfigOption::DEFAULT_PERMS);
if (param)
permission_default = parsePermissions(param->value.c_str());
#ifdef HAVE_UN
param = config.GetParam(ConfigOption::LOCAL_PERMISSIONS);
if (param != nullptr)
local_permissions = parsePermissions(param->value.c_str());
else
local_permissions = permission_default;
#endif
}
int getPermissionFromPassword(char const* password, unsigned* permission)
{
auto i = permission_passwords.find(password);
if (i == permission_passwords.end())
return -1;
*permission = i->second;
return 0;
}
unsigned getDefaultPermissions(void)
{
return permission_default;
}
#ifdef HAVE_UN
unsigned
GetLocalPermissions() noexcept
{
return local_permissions;
}
#endif
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