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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/***************************************************************************
* Copyright (C) 2013 by Timothy Pearson *
* [email protected] *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdlib.h>
#include <csignal>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <netdb.h>
#include <pwd.h>
#include <tdeapplication.h>
#include <tdestartupinfo.h>
#include <tdecmdlineargs.h>
#include <tdeaboutdata.h>
#include <ksimpleconfig.h>
#include <tqdatetime.h>
#include <tqfile.h>
#include <tqdir.h>
#include <libtdeldap.h>
// FIXME
// Connect this to CMake/Automake
#define KDE_CONFDIR "/etc/trinity"
static const char description[] =
I18N_NOOP("TDE utility for updating realm certificates");
static const char version[] = "v0.0.1";
bool received_sighup = false;
void signalHandler(int signum)
{
printf("[INFO] Got signal %d\n\r", signum);
if (signum == SIGHUP) {
received_sighup = true;
}
else if (signum == SIGTERM) {
unlink(TDE_LDAP_CERT_UPDATER_PID_FILE);
exit(0);
}
else if (signum == SIGINT) {
unlink(TDE_LDAP_CERT_UPDATER_PID_FILE);
exit(0);
}
}
int get_certificate_from_server(TQString certificateName, LDAPRealmConfig realmcfg)
{
int retcode = 0;
TQString errorstring;
// Bind anonymously to LDAP
LDAPCredentials* credentials = new LDAPCredentials;
credentials->username = "";
credentials->password = "";
credentials->realm = realmcfg.name.upper();
credentials->use_tls = false;
LDAPManager* ldap_mgr = new LDAPManager(realmcfg.name.upper(), TQString("ldap://%1").arg(realmcfg.admin_server).ascii(), credentials);
// Add the domain-wide computer local admin group to local sudoers
ldap_mgr->writeSudoersConfFile(&errorstring);
// Get and install the CA root certificate from LDAP
printf("[INFO] Updating certificate %s from LDAP\n\r", certificateName.ascii());
if (ldap_mgr->getTDECertificate("publicRootCertificate", certificateName, &errorstring) != 0) {
printf("[ERROR] Unable to obtain root certificate for realm %s: %s", realmcfg.name.upper().ascii(), errorstring.ascii());
retcode = 1;
}
delete ldap_mgr;
delete credentials;
return retcode;
}
int main(int argc, char *argv[])
{
// Register signal handler for SIGHUP
signal(SIGHUP, signalHandler);
// Register signal handler for SIGINT
signal(SIGINT, signalHandler);
// Register signal handler for SIGTERM
signal(SIGTERM, signalHandler);
TQDir pidDir(TDE_LDAP_PID_DIR);
if (!pidDir.exists()) {
mkdir(TDE_LDAP_PID_DIR, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
}
TQFile pidFile(TDE_LDAP_CERT_UPDATER_PID_FILE);
if (pidFile.open(IO_WriteOnly)) {
TQTextStream stream(&pidFile);
stream << getpid();
pidFile.close();
}
// Seed random number generator
struct timeval time;
gettimeofday(&time,NULL);
srand((time.tv_sec * 1000) + (time.tv_usec / 1000));
// Initialize TDE application libraries
TDEAboutData aboutData( "tdeldapcertupdater", I18N_NOOP("Realm Certificate Updater"),
version, description, TDEAboutData::License_GPL,
"(c) 2013, Timothy Pearson");
aboutData.addAuthor("Timothy Pearson",0, "[email protected]");
TDECmdLineArgs::init( argc, argv, &aboutData );
TDEApplication::disableAutoDcopRegistration();
TDEApplication app(false, false);
TDEStartupInfo::appStarted();
//======================================================================================================================================================
//
// Updater code follows
//
//======================================================================================================================================================
KSimpleConfig* systemconfig = new KSimpleConfig( TQString::fromLatin1( KDE_CONFDIR "/ldap/ldapconfigrc" ));
LDAPRealmConfigList realms = LDAPManager::readTDERealmList(systemconfig, false);
TQString m_defaultRealm = systemconfig->readEntry("DefaultRealm");
int prevSecondsToExpiry = (7*24*60*60);
while (1) {
bool allDownloadsOK = true;
TQDateTime now = TQDateTime::currentDateTime();
TQDateTime earliestCertExpiry = now.addDays(14); // Recheck every 7 days regardless of last expiry check results
LDAPRealmConfigList::Iterator it;
for (it = realms.begin(); it != realms.end(); ++it) {
LDAPRealmConfig realmcfg = it.data();
TQString certificateName = KERBEROS_PKI_PUBLICDIR + realmcfg.admin_server + ".ldap.crt";
TQDateTime certExpiry;
TQDateTime soon = now.addDays(7); // Keep in sync with src/ldapcontroller.cpp
if (TQFile::exists(certificateName)) {
certExpiry = LDAPManager::getCertificateExpiration(certificateName);
if (certExpiry >= now) {
printf("[INFO] Certificate %s expires %s\n\r", certificateName.ascii(), certExpiry.toString().ascii()); fflush(stdout);
}
if ((certExpiry < now) || ((certExpiry >= now) && (certExpiry < soon))) {
if (get_certificate_from_server(certificateName, realmcfg) != 0) {
allDownloadsOK = false;
}
}
if (certExpiry < earliestCertExpiry) {
earliestCertExpiry = certExpiry;
}
}
else {
mkdir(TDE_CERTIFICATE_DIR, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
mkdir(KERBEROS_PKI_PUBLICDIR, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
if (get_certificate_from_server(certificateName, realmcfg) != 0) {
allDownloadsOK = false;
}
}
}
earliestCertExpiry = earliestCertExpiry.addDays(-7); // Keep in sync with now.addDays above (use negative of value given above)
int secondsToExpiry = now.secsTo(earliestCertExpiry);
secondsToExpiry = secondsToExpiry + (rand()%(5*60)); // Nothing worse than thousands of clients hammering the LDAP server all at once...
if (secondsToExpiry < 1) {
secondsToExpiry = 1;
}
if ((prevSecondsToExpiry == 1) && (allDownloadsOK)) {
// The server has not yet updated its certificate, even though our copy is close to expiration
// Therefore, do not hammer the server with useless requests!
prevSecondsToExpiry = (15*60) + (rand()%(5*60));
}
prevSecondsToExpiry = secondsToExpiry;
printf("[INFO] Will recheck certificates in %d seconds (%d days)\n\r", secondsToExpiry, secondsToExpiry/60/60/24); fflush(stdout);
if (sleep(secondsToExpiry) != 0) {
// Signal caught
if (!received_sighup) {
break;
}
}
}
unlink(TDE_LDAP_CERT_UPDATER_PID_FILE);
//======================================================================================================================================================
return 0;
}
|
