kio

ksslsettings.cc

00001 /* This file is part of the KDE project
00002  *
00003  * Copyright (C) 2000 George Staikos <staikos@kde.org>
00004  *
00005  * This library is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU Library General Public
00007  * License as published by the Free Software Foundation; either
00008  * version 2 of the License, or (at your option) any later version.
00009  *
00010  * This library is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Library General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Library General Public License
00016  * along with this library; see the file COPYING.LIB.  If not, write to
00017  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00018  * Boston, MA 02110-1301, USA.
00019  */
00020 
00021 #ifdef HAVE_CONFIG_H
00022 #include <config.h>
00023 #endif
00024 
00025 #include <sys/types.h>
00026 #include <sys/stat.h>
00027  
00028 #include <stdlib.h>
00029 #include <pwd.h>
00030 #include <unistd.h>
00031 
00032 #include <qfile.h>
00033 #include <qsortedlist.h>
00034 
00035 #include "ksslsettings.h"
00036 #include <kglobal.h>
00037 #include <kstandarddirs.h>
00038 #include <kdebug.h>
00039 
00040 // this hack provided by Malte Starostik to avoid glibc/openssl bug
00041 // on some systems
00042 #ifdef KSSL_HAVE_SSL
00043 #define crypt _openssl_crypt
00044 #include <openssl/ssl.h>
00045 #undef crypt
00046 #endif
00047 #include <kopenssl.h>
00048 
00049 #ifdef KSSL_HAVE_SSL
00050 #define sk_new d->kossl->sk_new
00051 #define sk_push d->kossl->sk_push
00052 #define sk_free d->kossl->sk_free
00053 #define sk_value d->kossl->sk_value
00054 #define sk_num d->kossl->sk_num
00055 #define sk_dup d->kossl->sk_dup
00056 #define sk_pop d->kossl->sk_pop
00057 #endif
00058 
00059       class CipherNode {
00060       public:
00061         CipherNode(const char *_name, int _keylen) : 
00062                       name(_name), keylen(_keylen) {}
00063         QString name;
00064         int keylen;
00065         inline int operator==(CipherNode &x) 
00066                      { return ((x.keylen == keylen) && (x.name == name)); }
00067         inline int operator< (CipherNode &x) { return keylen < x.keylen;  }
00068         inline int operator<=(CipherNode &x) { return keylen <= x.keylen; }
00069         inline int operator> (CipherNode &x) { return keylen > x.keylen;  }
00070         inline int operator>=(CipherNode &x) { return keylen >= x.keylen; }
00071       };
00072 
00073 
00074 class KSSLSettingsPrivate {
00075 public:
00076   KSSLSettingsPrivate() {
00077     kossl = NULL;   // try to delay this as long as possible
00078   }
00079   ~KSSLSettingsPrivate() {
00080 
00081   }
00082 
00083   KOSSL *kossl;
00084   bool m_bUseEGD;
00085   bool m_bUseEFile;
00086   QString m_EGDPath;
00087   bool m_bSendX509;
00088   bool m_bPromptX509;
00089 };
00090 
00091 //
00092 // FIXME
00093 // Implementation note: for now, we only read cipher settings from disk,
00094 //                      and do not store them in memory.  This should change.
00095 //
00096 
00097 KSSLSettings::KSSLSettings(bool readConfig) {
00098   d = new KSSLSettingsPrivate;
00099   m_cfg = new KConfig("cryptodefaults", false, false);
00100 
00101   if (!KGlobal::dirs()->addResourceType("kssl", KStandardDirs::kde_default("data") + "kssl")) {
00102     //kdDebug(7029) << "Error adding (kssl, share/apps/kssl)" << endl;
00103   }
00104 
00105   if (readConfig) load();
00106 }
00107 
00108 
00109 // we don't save settings incase it was a temporary object
00110 KSSLSettings::~KSSLSettings() {
00111   delete m_cfg;
00112   delete d;
00113 }
00114  
00115 
00116 bool KSSLSettings::sslv2() const {
00117   return m_bUseSSLv2;
00118 }
00119 
00120 
00121 bool KSSLSettings::sslv3() const {
00122   return m_bUseSSLv3;
00123 }
00124 
00125 
00126 bool KSSLSettings::tlsv1() const {
00127   return m_bUseTLSv1;
00128 }
00129 
00130  
00131 // FIXME: we should make a default list available if this fails
00132 //        since OpenSSL seems to just choose any old thing if it's given an
00133 //        empty list.  This behavior is not confirmed though.
00134 QString KSSLSettings::getCipherList() {
00135     QString clist;
00136 #ifdef KSSL_HAVE_SSL
00137     QString tcipher;
00138     bool firstcipher = true;
00139     SSL_METHOD *meth = 0L;
00140     QPtrList<CipherNode> cipherList;
00141 
00142     cipherList.setAutoDelete(true);
00143 
00144     if (!d->kossl)
00145         d->kossl = KOSSL::self();
00146 
00147     if (m_bUseSSLv3 && m_bUseSSLv2)
00148         meth = d->kossl->SSLv23_client_method();
00149     else if(m_bUseSSLv3)
00150         meth = d->kossl->SSLv3_client_method();
00151     else if (m_bUseSSLv2)
00152         meth = d->kossl->SSLv2_client_method();
00153 
00154     SSL_CTX *ctx = d->kossl->SSL_CTX_new(meth);
00155     SSL* ssl = d->kossl->SSL_new(ctx);
00156     STACK_OF(SSL_CIPHER)* sk = d->kossl->SSL_get_ciphers(ssl);
00157     int cnt = sk_SSL_CIPHER_num(sk);
00158     for (int i=0; i< cnt; i++) {
00159         SSL_CIPHER *sc = sk_SSL_CIPHER_value(sk,i);
00160         if (!sc)
00161             break;
00162 
00163         if(!strcmp("SSLv2", d->kossl->SSL_CIPHER_get_version(sc)))
00164             m_cfg->setGroup("SSLv2");
00165         else
00166             m_cfg->setGroup("SSLv3");
00167 
00168         tcipher.sprintf("cipher_%s", sc->name);
00169         int bits = d->kossl->SSL_CIPHER_get_bits(sc, NULL);
00170         if (m_cfg->readBoolEntry(tcipher, bits >= 56)) {
00171             CipherNode *xx = new CipherNode(sc->name,bits);
00172             if (!cipherList.contains(xx))
00173                 cipherList.prepend(xx);
00174             else
00175                 delete xx;
00176         }
00177     }
00178     d->kossl->SSL_free(ssl);
00179     d->kossl->SSL_CTX_free(ctx);
00180 
00181     // Remove any ADH ciphers as per RFC2246
00182     // Also remove NULL ciphers and 168bit ciphers
00183     for (unsigned int i = 0; i < cipherList.count(); i++) {
00184         CipherNode *j = 0L;
00185         while ((j = cipherList.at(i)) != 0L) {
00186             if (j->name.contains("ADH-") || j->name.contains("NULL-") || j->name.contains("DES-CBC3-SHA") || j->name.contains("FZA")) {
00187                 cipherList.remove(j);
00188             } else {
00189                 break;
00190             }
00191         }
00192     } 
00193 
00194     // now assemble the list  cipher1:cipher2:cipher3:...:ciphern
00195     while (!cipherList.isEmpty()) {
00196         if (firstcipher)
00197             firstcipher = false;
00198         else clist.append(":");
00199         clist.append(cipherList.getLast()->name);
00200         cipherList.removeLast();
00201     } // while
00202 
00203     kdDebug(7029) << "Cipher list is: " << clist << endl;
00204 
00205 #endif
00206     return clist;
00207 }
00208 
00209 // FIXME - sync these up so that we can use them with the control module!!
00210 void KSSLSettings::load() {
00211   m_cfg->reparseConfiguration();
00212 
00213   m_cfg->setGroup("TLS");
00214   m_bUseTLSv1 = m_cfg->readBoolEntry("Enabled", true);
00215  
00216   m_cfg->setGroup("SSLv2");
00217   m_bUseSSLv2 = m_cfg->readBoolEntry("Enabled", false);
00218  
00219   m_cfg->setGroup("SSLv3");
00220   m_bUseSSLv3 = m_cfg->readBoolEntry("Enabled", true);
00221  
00222   m_cfg->setGroup("Warnings");
00223   m_bWarnOnEnter = m_cfg->readBoolEntry("OnEnter", false);
00224   m_bWarnOnLeave = m_cfg->readBoolEntry("OnLeave", true);
00225   m_bWarnOnUnencrypted = m_cfg->readBoolEntry("OnUnencrypted", true);
00226   m_bWarnOnMixed = m_cfg->readBoolEntry("OnMixed", true);
00227 
00228   m_cfg->setGroup("Validation");
00229   m_bWarnSelfSigned = m_cfg->readBoolEntry("WarnSelfSigned", true);
00230   m_bWarnExpired = m_cfg->readBoolEntry("WarnExpired", true);
00231   m_bWarnRevoked = m_cfg->readBoolEntry("WarnRevoked", true);
00232 
00233   m_cfg->setGroup("EGD");
00234   d->m_bUseEGD = m_cfg->readBoolEntry("UseEGD", false);
00235   d->m_bUseEFile = m_cfg->readBoolEntry("UseEFile", false);
00236   d->m_EGDPath = m_cfg->readPathEntry("EGDPath");
00237 
00238   m_cfg->setGroup("Auth");
00239   d->m_bSendX509 = ("send" == m_cfg->readEntry("AuthMethod", ""));
00240   d->m_bPromptX509 = ("prompt" == m_cfg->readEntry("AuthMethod", ""));
00241 
00242   #ifdef KSSL_HAVE_SSL
00243 
00244 
00245 
00246   #endif
00247 }
00248 
00249 
00250 void KSSLSettings::defaults() {
00251   m_bUseTLSv1 = true;
00252   m_bUseSSLv2 = false;
00253   m_bUseSSLv3 = true;
00254   m_bWarnOnEnter = false;
00255   m_bWarnOnLeave = true;
00256   m_bWarnOnUnencrypted = true;
00257   m_bWarnOnMixed = true;
00258   m_bWarnSelfSigned = true;
00259   m_bWarnExpired = true;
00260   m_bWarnRevoked = true;
00261   d->m_bUseEGD = false;
00262   d->m_bUseEFile = false;
00263   d->m_EGDPath = "";
00264 }
00265 
00266 
00267 void KSSLSettings::save() {
00268   m_cfg->setGroup("TLS");
00269   m_cfg->writeEntry("Enabled", m_bUseTLSv1);
00270  
00271   m_cfg->setGroup("SSLv2");
00272   m_cfg->writeEntry("Enabled", m_bUseSSLv2);
00273  
00274   m_cfg->setGroup("SSLv3");
00275   m_cfg->writeEntry("Enabled", m_bUseSSLv3);
00276  
00277   m_cfg->setGroup("Warnings");
00278   m_cfg->writeEntry("OnEnter", m_bWarnOnEnter);
00279   m_cfg->writeEntry("OnLeave", m_bWarnOnLeave);
00280   m_cfg->writeEntry("OnUnencrypted", m_bWarnOnUnencrypted);
00281   m_cfg->writeEntry("OnMixed", m_bWarnOnMixed);
00282 
00283   m_cfg->setGroup("Validation");
00284   m_cfg->writeEntry("WarnSelfSigned", m_bWarnSelfSigned);
00285   m_cfg->writeEntry("WarnExpired", m_bWarnExpired);
00286   m_cfg->writeEntry("WarnRevoked", m_bWarnRevoked);
00287 
00288   m_cfg->setGroup("EGD");
00289   m_cfg->writeEntry("UseEGD", d->m_bUseEGD);
00290   m_cfg->writeEntry("UseEFile", d->m_bUseEFile);
00291   m_cfg->writePathEntry("EGDPath", d->m_EGDPath);
00292 
00293   m_cfg->sync();
00294   // FIXME - ciphers
00295 #if 0
00296 #ifdef KSSL_HAVE_SSL
00297   m_cfg->setGroup("SSLv2");
00298   for (unsigned int i = 0; i < v2ciphers.count(); i++) {
00299     QString ciphername;
00300     ciphername.sprintf("cipher_%s", v2ciphers[i].ascii());
00301     if (v2selectedciphers.contains(v2ciphers[i])) {
00302       m_cfg->writeEntry(ciphername, true);
00303     } else m_cfg->writeEntry(ciphername, false);
00304   }
00305  
00306   m_cfg->setGroup("SSLv3");
00307   for (unsigned int i = 0; i < v3ciphers.count(); i++) {
00308     QString ciphername;
00309     ciphername.sprintf("cipher_%s", v3ciphers[i].ascii());
00310     if (v3selectedciphers.contains(v3ciphers[i])) {
00311       m_cfg->writeEntry(ciphername, true);
00312     } else m_cfg->writeEntry(ciphername, false);
00313   }
00314 #endif 
00315  
00316   m_cfg->sync();
00317  
00318   // insure proper permissions -- contains sensitive data
00319   QString cfgName(KGlobal::dirs()->findResource("config", "cryptodefaults"));
00320   if (!cfgName.isEmpty())
00321     ::chmod(QFile::encodeName(cfgName), 0600);
00322 #endif
00323 }
00324 
00325 
00326 bool KSSLSettings::warnOnEnter() const       { return m_bWarnOnEnter; }
00327 void KSSLSettings::setWarnOnEnter(bool x)    { m_bWarnOnEnter = x; }
00328 bool KSSLSettings::warnOnUnencrypted() const { return m_bWarnOnUnencrypted; }
00329 void KSSLSettings::setWarnOnUnencrypted(bool x) { m_bWarnOnUnencrypted = x; }
00330 bool KSSLSettings::warnOnLeave() const       { return m_bWarnOnLeave; }
00331 void KSSLSettings::setWarnOnLeave(bool x)    { m_bWarnOnLeave = x; }
00332 bool KSSLSettings::warnOnMixed() const       { return m_bWarnOnMixed; }
00333 bool KSSLSettings::warnOnSelfSigned() const  { return m_bWarnSelfSigned; }
00334 bool KSSLSettings::warnOnRevoked() const     { return m_bWarnRevoked; }
00335 bool KSSLSettings::warnOnExpired() const     { return m_bWarnExpired; }
00336 bool KSSLSettings::useEGD() const            { return d->m_bUseEGD;      }
00337 bool KSSLSettings::useEFile() const          { return d->m_bUseEFile;    }
00338 bool KSSLSettings::autoSendX509() const      { return d->m_bSendX509; }
00339 bool KSSLSettings::promptSendX509() const    { return d->m_bPromptX509; }
00340 
00341 void KSSLSettings::setTLSv1(bool enabled) { m_bUseTLSv1 = enabled; }
00342 void KSSLSettings::setSSLv2(bool enabled) { m_bUseSSLv2 = enabled; }
00343 void KSSLSettings::setSSLv3(bool enabled) { m_bUseSSLv3 = enabled; }
00344 
00345 QString& KSSLSettings::getEGDPath()       { return d->m_EGDPath; }
00346 
00347 #ifdef KSSL_HAVE_SSL
00348 #undef sk_new
00349 #undef sk_push
00350 #undef sk_free
00351 #undef sk_value
00352 #undef sk_num
00353 #undef sk_pop
00354 #undef sk_dup
00355 #endif
00356
kio

ksslsettings.cc

kio

API Reference
