summaryrefslogtreecommitdiffstats
path: root/knewstuff/security.cpp
blob: 8ef377b7832836c9ef11b9006219c3a025f2ff30 (plain)
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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
/***************************************************************************
                          security.cpp  -  description
                             -------------------
    begin                : Thu Jun 24 11:22:12 2004
    copyright          : (C) 2004, 2005 by Andras Mantia <amantia@kde.org>
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Library General Public License as       *
 *   published by the Free Software Foundation; version 2 of the License.  *
 *                                                                         *
 ***************************************************************************/

 //qt includes
#include <tqfile.h>
#include <tqfileinfo.h>
#include <tqstringlist.h>
#include <tqtimer.h>

 //kde includes
#include <kdebug.h>
#include <kinputdialog.h>
#include <klocale.h>
#include <kmdcodec.h>
#include <kmessagebox.h>
#include <kpassdlg.h>
#include <kprocio.h>

 //app includes
#include "security.h"

using namespace KNS;

Security::Security()
{
   m_keysRead = false;
   m_gpgRunning = false;
   readKeys();
   readSecretKeys();
}


Security::~Security()
{
}

void Security::readKeys()
{
  if (m_gpgRunning)
  {
    TQTimer::singleShot(5, this, TQT_SLOT(readKeys()));
    return;
  }
  m_runMode = List;
  m_keys.clear();
  KProcIO *readProcess=new KProcIO();
  *readProcess << "gpg"<<"--no-secmem-warning"<<"--no-tty"<<"--with-colon"<<"--list-keys";
  connect(readProcess, TQT_SIGNAL(processExited(KProcess *)), this, TQT_SLOT(slotProcessExited(KProcess *)));
  connect(readProcess, TQT_SIGNAL(readReady(KProcIO *)) ,this, TQT_SLOT(slotDataArrived(KProcIO *)));
  if (!readProcess->start(KProcess::NotifyOnExit, true))
    KMessageBox::error(0L, i18n("<qt>Cannot start <i>gpg</i> and retrieve the available keys. Make sure that <i>gpg</i> is installed, otherwise verification of downloaded resources will not be possible.</qt>"));
  else
    m_gpgRunning = true;
}

void Security::readSecretKeys()
{
  if (m_gpgRunning)
  {
    TQTimer::singleShot(5, this, TQT_SLOT(readSecretKeys()));
    return;
  }
  m_runMode = ListSecret;
  KProcIO *readProcess=new KProcIO();
  *readProcess << "gpg"<<"--no-secmem-warning"<<"--no-tty"<<"--with-colon"<<"--list-secret-keys";
  connect(readProcess, TQT_SIGNAL(processExited(KProcess *)), this, TQT_SLOT(slotProcessExited(KProcess *)));
  connect(readProcess, TQT_SIGNAL(readReady(KProcIO *)) ,this, TQT_SLOT(slotDataArrived(KProcIO *)));
  if (readProcess->start(KProcess::NotifyOnExit, true))
    m_gpgRunning = true;  
}

void Security::slotProcessExited(KProcess *process)
{
  switch (m_runMode)
   {
     case ListSecret:
                  m_keysRead = true;
                  break;
     case Verify: emit validityResult(m_result);
                  break;
     case Sign:   emit fileSigned(m_result);
                  break;

   }
   m_gpgRunning = false;
   delete process;
}

void Security::slotDataArrived(KProcIO *procIO)
{
  TQString data;
  while (procIO->readln(data, true) != -1)
  {
     switch (m_runMode)
     {
        case List:
        case ListSecret:  
          if (data.startsWith("pub") || data.startsWith("sec"))
          {
              KeyStruct key;
              if (data.startsWith("pub"))
                key.secret = false;
              else
                key.secret = true;
              TQStringList line = TQStringList::split(":", data, true);
              key.id = line[4];
              TQString shortId = key.id.right(8);
              TQString trustStr = line[1];
              key.trusted = false;
              if (trustStr == "u" || trustStr == "f")
                  key.trusted = true;
              data = line[9];
              key.mail=data.section('<', -1, -1);
              key.mail.truncate(key.mail.length() - 1);
              key.name=data.section('<',0,0);
              if (key.name.find("(")!=-1)
                  key.name=key.name.section('(',0,0);
              m_keys[shortId] = key;
          }
          break;
       case Verify:
          data = data.section("]",1,-1).stripWhiteSpace();
          if (data.startsWith("GOODSIG"))
          {
              m_result &= SIGNED_BAD_CLEAR;
              m_result |= SIGNED_OK;
              TQString id = data.section(" ", 1 , 1).right(8);
              if (!m_keys.contains(id))
              {
                  m_result |= UNKNOWN;
              } else
              {
                 m_signatureKey = m_keys[id];
              }
          } else
          if (data.startsWith("NO_PUBKEY"))
          {
              m_result &= SIGNED_BAD_CLEAR;
              m_result |= UNKNOWN;
          } else
          if (data.startsWith("BADSIG"))
          {
              m_result |= SIGNED_BAD;
              TQString id = data.section(" ", 1 , 1).right(8);
              if (!m_keys.contains(id))
              {
                  m_result |= UNKNOWN;
              } else
              {
                 m_signatureKey = m_keys[id];
              }
          } else
          if (data.startsWith("TRUST_ULTIMATE"))
          {
            m_result &= SIGNED_BAD_CLEAR;
            m_result |= TRUSTED;
          }
          break;

       case Sign:
         if (data.find("passphrase.enter") != -1)
         {
           TQCString password;
           KeyStruct key = m_keys[m_secretKey];
           int result = KPasswordDialog::getPassword(password, i18n("<qt>Enter passphrase for key <b>0x%1</b>, belonging to<br><i>%2&lt;%3&gt;</i>:</qt>").arg(m_secretKey).arg(key.name).arg(key.mail));
           if (result == KPasswordDialog::Accepted)
           {
             procIO->writeStdin(password, true);
             password.fill(' ');
           }
           else
           {
             m_result |= BAD_PASSPHRASE;
             slotProcessExited(procIO);
             return;
           }
         } else
         if (data.find("BAD_PASSPHRASE") != -1)
         {
           m_result |= BAD_PASSPHRASE;
         }
         break;
     }
  }
}

void Security::checkValidity(const TQString& filename)
{
  m_fileName = filename;
  slotCheckValidity();
}  

void Security::slotCheckValidity()
{  
  if (!m_keysRead || m_gpgRunning)
  {
    TQTimer::singleShot(5, this, TQT_SLOT(slotCheckValidity()));
    return;
  }
  if (m_keys.count() == 0)
  {    
    emit validityResult(-1);
    return;
  }  

  m_result = 0;
  m_runMode = Verify;
  TQFileInfo f(m_fileName);
  //check the MD5 sum
  TQString md5sum;
  const char* c = "";
  KMD5 context(c);
  TQFile file(m_fileName);
  if (file.open(IO_ReadOnly))
  {
     context.reset();
     context.update(file);
     md5sum = context.hexDigest();
     file.close();
  }
  file.setName(f.dirPath() + "/md5sum");
  if (file.open(IO_ReadOnly))
  {
     TQString md5sum_file;
     file.readLine(md5sum_file, 50);
     if (!md5sum.isEmpty() && !md5sum_file.isEmpty() && md5sum_file.startsWith(md5sum))
       m_result |= MD5_OK;
     file.close();
  }
  m_result |= SIGNED_BAD;
  m_signatureKey.id = "";
  m_signatureKey.name = "";
  m_signatureKey.mail = "";
  m_signatureKey.trusted = false;

  //verify the signature
  KProcIO *verifyProcess=new KProcIO();
  *verifyProcess<<"gpg"<<"--no-secmem-warning"<<"--status-fd=2"<<"--command-fd=0"<<"--verify" << f.dirPath() + "/signature"<< m_fileName;
  connect(verifyProcess, TQT_SIGNAL(processExited(KProcess *)),this, TQT_SLOT(slotProcessExited(KProcess *)));
  connect(verifyProcess, TQT_SIGNAL(readReady(KProcIO *)),this, TQT_SLOT(slotDataArrived(KProcIO *)));
  if (verifyProcess->start(KProcess::NotifyOnExit,true))
      m_gpgRunning = true;
  else
  {
      KMessageBox::error(0L, i18n("<qt>Cannot start <i>gpg</i> and check the validity of the file. Make sure that <i>gpg</i> is installed, otherwise verification of downloaded resources will not be possible.</qt>"));
      emit validityResult(0);
      delete verifyProcess;
  }
}

void Security::signFile(const TQString &fileName)
{
  m_fileName = fileName;
  slotSignFile();
}

void Security::slotSignFile()
{
  if (!m_keysRead || m_gpgRunning)
  {
    TQTimer::singleShot(5, this, TQT_SLOT(slotSignFile()));
    return;
  }
  
  TQStringList secretKeys;
  for (TQMap<TQString, KeyStruct>::Iterator it = m_keys.begin(); it != m_keys.end(); ++it)
  {
    if (it.data().secret)
      secretKeys.append(it.key());
  }
  
  if (secretKeys.count() == 0)
  {    
    emit fileSigned(-1);
    return;
  }  
  
  m_result = 0;
  TQFileInfo f(m_fileName);

  //create the MD5 sum
  TQString md5sum;
  const char* c = "";
  KMD5 context(c);
  TQFile file(m_fileName);
  if (file.open(IO_ReadOnly))
  {
    context.reset();
    context.update(file);
    md5sum = context.hexDigest();
    file.close();
  }
  file.setName(f.dirPath() + "/md5sum");
  if (file.open(IO_WriteOnly))
  {
    TQTextStream stream(&file);
    stream << md5sum;
    m_result |= MD5_OK;
    file.close();
  }
  
  if (secretKeys.count() > 1)
  {
    bool ok;
    secretKeys = KInputDialog::getItemList(i18n("Select Signing Key"), i18n("Key used for signing:"), secretKeys, secretKeys[0], false, &ok);    
    if (ok)
      m_secretKey = secretKeys[0];
    else
    {
      emit fileSigned(0);
      return;
    }
  } else
    m_secretKey = secretKeys[0];

  //verify the signature
  KProcIO *signProcess=new KProcIO();
  *signProcess<<"gpg"<<"--no-secmem-warning"<<"--status-fd=2"<<"--command-fd=0"<<"--no-tty"<<"--detach-sign" << "-u" << m_secretKey << "-o" << f.dirPath() + "/signature" << m_fileName;
  connect(signProcess, TQT_SIGNAL(processExited(KProcess *)),this, TQT_SLOT(slotProcessExited(KProcess *)));
  connect(signProcess, TQT_SIGNAL(readReady(KProcIO *)),this, TQT_SLOT(slotDataArrived(KProcIO *)));
  m_runMode = Sign;
  if (signProcess->start(KProcess::NotifyOnExit,true))
    m_gpgRunning = true;
  else
  {
    KMessageBox::error(0L, i18n("<qt>Cannot start <i>gpg</i> and sign the file. Make sure that <i>gpg</i> is installed, otherwise signing of the resources will not be possible.</qt>"));
    emit fileSigned(0);
    delete signProcess;
  }
}

#include "security.moc"