1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* Copyright (C) 2003-2015 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/ConfigGlobal.hxx"
#include "config/ConfigOption.hxx"
#include "system/FatalError.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;
gcc_pure
static unsigned
ParsePermission(const char *p)
{
for (auto i = permission_names; i->name != nullptr; ++i)
if (strcmp(p, i->name) == 0)
return i->value;
FormatFatalError("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(void)
{
unsigned permission;
const struct config_param *param;
permission_default = PERMISSION_READ | PERMISSION_ADD |
PERMISSION_CONTROL | PERMISSION_ADMIN;
param = config_get_param(CONF_PASSWORD);
if (param) {
permission_default = 0;
do {
const char *separator =
strchr(param->value.c_str(),
PERMISSION_PASSWORD_CHAR);
if (separator == NULL)
FormatFatalError("\"%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));
} while ((param = param->next) != nullptr);
}
param = config_get_param(CONF_DEFAULT_PERMS);
if (param)
permission_default = parsePermissions(param->value.c_str());
}
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;
}
|
