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
|
/* Copyright (C) 2005 Martin Koegler
* Copyright (C) 2006 OCCAM Financial Technology
*
* This 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 software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <rfb/SSecurityPlain.h>
#include <rfb/SConnection.h>
#include <rfb/Exception.h>
#include <rfb/util.h>
#include <rdr/InStream.h>
#if !defined(WIN32) && !defined(__APPLE__)
#include <rfb/UnixPasswordValidator.h>
#include <unistd.h>
#include <pwd.h>
#endif
#ifdef WIN32
#include <rfb/WinPasswdValidator.h>
#endif
using namespace rfb;
StringParameter PasswordValidator::plainUsers
("PlainUsers",
"Users permitted to access via Plain security type (including TLSPlain, X509Plain etc.)"
#ifdef HAVE_NETTLE
" or RSA-AES security types (RA2, RA2ne, RA2_256, RA2ne_256)"
#endif
,
"");
bool PasswordValidator::validUser(const char* username)
{
std::vector<std::string> users;
users = split(plainUsers, ',');
for (size_t i = 0; i < users.size(); i++) {
if (users[i] == "*")
return true;
#if !defined(WIN32) && !defined(__APPLE__)
if (users[i] == "%u") {
struct passwd *pw = getpwnam(username);
if (pw && pw->pw_uid == getuid())
return true;
}
#endif
if (users[i] == username)
return true;
}
return false;
}
SSecurityPlain::SSecurityPlain(SConnection* sc_) : SSecurity(sc_)
{
#ifdef WIN32
valid = new WinPasswdValidator();
#elif !defined(__APPLE__)
valid = new UnixPasswordValidator();
#else
valid = nullptr;
#endif
state = 0;
}
bool SSecurityPlain::processMsg()
{
rdr::InStream* is = sc->getInStream();
char password[1024];
if (!valid)
throw std::logic_error("No password validator configured");
if (state == 0) {
if (!is->hasData(8))
return false;
ulen = is->readU32();
if (ulen >= sizeof(username))
throw auth_error("Too long username");
plen = is->readU32();
if (plen >= sizeof(password))
throw auth_error("Too long password");
state = 1;
}
if (state == 1) {
if (!is->hasData(ulen + plen))
return false;
state = 2;
is->readBytes((uint8_t*)username, ulen);
is->readBytes((uint8_t*)password, plen);
password[plen] = 0;
username[ulen] = 0;
plen = 0;
if (!valid->validate(sc, username, password))
throw auth_error("Authentication failed");
}
return true;
}
|
