tls support for IMAP implemented

2 files changed, 79 insertions, 6 deletions

diff --git a/noncore/net/mail/libmailwrapper/imapwrapper.cpp b/noncore/net/mail/libmailwrapper/imapwrapper.cpp
index 098dbdc..1dfcc4c 100644
--- a/noncore/net/mail/libmailwrapper/imapwrapper.cpp
+++ b/noncore/net/mail/libmailwrapper/imapwrapper.cpp
@@ -20,123 +20,195 @@ IMAPwrapper::~IMAPwrapper()
 }
 
 /* to avoid to often select statements in loops etc.
    we trust that we are logged in and connection is established!*/
 int IMAPwrapper::selectMbox(const QString&mbox)
 {
     if (mbox == m_Lastmbox) {
         return MAILIMAP_NO_ERROR;
     }
     int err = mailimap_select( m_imap, (char*)mbox.latin1());
     if ( err != MAILIMAP_NO_ERROR ) {
         qDebug("error selecting mailbox: %s",m_imap->imap_response);
         m_Lastmbox = "";
         return err;
     }
     m_Lastmbox = mbox;
     return err;
 }
 
 void IMAPwrapper::imap_progress( size_t current, size_t maximum )
 {
     qDebug( "IMAP: %i of %i", current, maximum );
 }
 
+bool IMAPwrapper::start_tls(bool force_tls)
+{
+    int err;
+    bool try_tls;
+    mailimap_capability_data * cap_data = 0;
+
+    err = mailimap_capability(m_imap,&cap_data);
+    if (err != MAILIMAP_NO_ERROR) {
+        Global::statusMessage("error getting capabilities!");
+        qDebug("error getting capabilities!");
+        return false;
+    }
+    clistiter * cur;
+    for(cur = clist_begin(cap_data->cap_list) ; cur != NULL;cur = clist_next(cur)) {
+        struct mailimap_capability * cap;
+        cap  = (struct mailimap_capability *)clist_content(cur);
+        if (cap->cap_type == MAILIMAP_CAPABILITY_NAME) {
+            if (strcasecmp(cap->cap_data.cap_name, "STARTTLS") == 0) {
+                try_tls = true;
+                break;
+            }
+        }
+    }
+    if (cap_data) {
+        mailimap_capability_data_free(cap_data);
+    }
+    if (try_tls) {
+        err =  mailimap_starttls(m_imap);
+        if (err != MAILIMAP_NO_ERROR && force_tls) {
+            Global::statusMessage(tr("Server has no TLS support!"));
+            qDebug("Server has no TLS support!");
+            try_tls = false;
+        } else {
+            mailstream_low * low;
+            mailstream_low * new_low;
+            low = mailstream_get_low(m_imap->imap_stream);
+            if (!low) {
+                try_tls = false;
+            } else {
+                int fd = mailstream_low_get_fd(low);
+                if (fd > -1 && (new_low = mailstream_low_ssl_open(fd))!=0) {
+                    mailstream_low_free(low);
+                    mailstream_set_low(m_imap->imap_stream, new_low);
+                } else {
+                    try_tls = false;
+                }
+            }
+        }
+   }
+   return try_tls;
+}
+
 void IMAPwrapper::login()
 {
     const char *server, *user, *pass;
     uint16_t port;
     int err = MAILIMAP_NO_ERROR;
 
     if (account->getOffline()) return;
     /* we are connected this moment */
     /* TODO: setup a timer holding the line or if connection closed - delete the value */
     if (m_imap) {
         err = mailimap_noop(m_imap);
         if (err!=MAILIMAP_NO_ERROR) {
             logout();
         } else {
             mailstream_flush(m_imap->imap_stream);
             return;
         }
     }
     server = account->getServer().latin1();
     port = account->getPort().toUInt();
 	if ( account->getUser().isEmpty() || account->getPassword().isEmpty() ) {
 	  LoginDialog login( account->getUser(), account->getPassword(), NULL, 0, true );
 	  login.show();
 	  if ( QDialog::Accepted == login.exec() ) {
 		// ok
 		user = login.getUser().latin1();
 		pass = login.getPassword().latin1();
 	  } else {
 		// cancel
 		qDebug( "IMAP: Login canceled" );
 		return;
 	  }
 	} else {
 	  user = account->getUser().latin1();
 	  pass = account->getPassword().latin1();
 	}
 
     m_imap = mailimap_new( 20, &imap_progress );
 
-
-
     /* connect */
-
     bool ssl = false;
+    bool try_tls = false;
+    bool force_tls = false;
 
     if  ( account->ConnectionType() == 2 ) {
         ssl = true;
     }
+    if (account->ConnectionType()==1) {
+        force_tls = true;
+    }
 
     if ( ssl ) {
         qDebug(  "using ssl" );
         err = mailimap_ssl_connect( m_imap, (char*)server, port );
     } else {
         err = mailimap_socket_connect( m_imap, (char*)server, port );
     }
 
     if ( err != MAILIMAP_NO_ERROR &&
          err != MAILIMAP_NO_ERROR_AUTHENTICATED &&
          err != MAILIMAP_NO_ERROR_NON_AUTHENTICATED ) {
          QString failure = "";
          if (err == MAILIMAP_ERROR_CONNECTION_REFUSED) {
             failure="Connection refused";
          } else {
             failure="Unknown failure";
          }
          Global::statusMessage(tr("error connecting imap server: %1").arg(failure));
          mailimap_free( m_imap );
          m_imap = 0;
          return;
     }
 
+    if (!ssl) {
+        try_tls = start_tls(force_tls);
+    }
+
+    bool ok = true;
+    if (force_tls && !try_tls) {
+        Global::statusMessage(tr("Server has no TLS support!"));
+        qDebug("Server has no TLS support!");
+        ok = false;
+    }
+
+
     /* login */
-    err = mailimap_login_simple( m_imap, (char*)user, (char*)pass );
-    if ( err != MAILIMAP_NO_ERROR ) {
-        Global::statusMessage(tr("error logging in imap server: %1").arg(m_imap->imap_response));
+
+    if (ok) {
+        err = mailimap_login_simple( m_imap, (char*)user, (char*)pass );
+        if ( err != MAILIMAP_NO_ERROR ) {
+            Global::statusMessage(tr("error logging in imap server: %1").arg(m_imap->imap_response));
+            ok = false;
+        }
+    }
+    if (!ok) {
         err = mailimap_close( m_imap );
         mailimap_free( m_imap );
         m_imap = 0;
     }
 }
 
 void IMAPwrapper::logout()
 {
     int err = MAILIMAP_NO_ERROR;
     if (!m_imap) return;
     err = mailimap_logout( m_imap );
     err = mailimap_close( m_imap );
     mailimap_free( m_imap );
     m_imap = 0;
     m_Lastmbox = "";
 }
 
 void IMAPwrapper::listMessages(const QString&mailbox,QList<RecMail> &target )
 {
     int err = MAILIMAP_NO_ERROR;
     clist *result = 0;
     clistcell *current;
     mailimap_fetch_type *fetchType = 0;
     mailimap_set *set = 0;
diff --git a/noncore/net/mail/libmailwrapper/imapwrapper.h b/noncore/net/mail/libmailwrapper/imapwrapper.h
index c10f86a..0a1fe2c 100644
--- a/noncore/net/mail/libmailwrapper/imapwrapper.h
+++ b/noncore/net/mail/libmailwrapper/imapwrapper.h
@@ -31,47 +31,48 @@ public:
     virtual void answeredMail(const RecMail&mail);
     virtual int deleteAllMail(const Folder*folder);
     virtual void storeMessage(const char*msg,size_t length, const QString&folder);
     virtual void mvcpAllMails(Folder*fromFolder,const QString&targetFolder,AbstractMail*targetWrapper,bool moveit);
     virtual void mvcpMail(const RecMail&mail,const QString&targetFolder,AbstractMail*targetWrapper,bool moveit);
 
     virtual RecBody fetchBody(const RecMail&mail);
     virtual QString fetchTextPart(const RecMail&mail,const RecPart&part);
     virtual encodedString* fetchDecodedPart(const RecMail&mail,const RecPart&part);
     virtual encodedString* fetchRawPart(const RecMail&mail,const RecPart&part);
     virtual encodedString* fetchRawBody(const RecMail&mail);
 
     virtual int createMbox(const QString&,const Folder*parentfolder=0,const QString& delemiter="/",bool getsubfolder=false);
     virtual int deleteMbox(const Folder*folder);
     
     static void imap_progress( size_t current, size_t maximum );
     
     virtual void logout();
     virtual const QString&getType()const;
     virtual const QString&getName()const;
 
 protected:
     RecMail*parse_list_result(mailimap_msg_att*);
     void login();
+    bool start_tls(bool force=true);
 
     virtual QString fetchTextPart(const RecMail&mail,const QValueList<int>&path,bool internal_call=false,const QString&enc="");
     virtual encodedString*fetchRawPart(const RecMail&mail,const QValueList<int>&path,bool internal_call);
     int selectMbox(const QString&mbox);
 
     void fillSinglePart(RecPart&target_part,mailimap_body_type_1part*Description);
     void fillSingleTextPart(RecPart&target_part,mailimap_body_type_text*which);
     void fillSingleBasicPart(RecPart&target_part,mailimap_body_type_basic*which);
     void fillSingleMsgPart(RecPart&target_part,mailimap_body_type_msg*which);
     void fillMultiPart(RecPart&target_part,mailimap_body_type_mpart*which);
     void traverseBody(const RecMail&mail,mailimap_body*body,RecBody&target_body,int current_recursion,QValueList<int>recList,int current_count=1);
     
     /* just helpers */
     static void fillBodyFields(RecPart&target_part,mailimap_body_fields*which);
     static QStringList address_list_to_stringlist(clist*list);
 
 
     IMAPaccount *account;
     mailimap *m_imap;
     QString m_Lastmbox;
 };
 
 #endif