Added support to directly connect also to Microsoft SQL Server database.

Fixed direct connection to always use the same query as of UNION query SQL injection (= one query with multiple columns/entries output).
Minor fixes to Firebird/Access/SQLite connectors to use connector's execute()/fetchall() as wrapper for third-party libraries' methods.
Forced conf.timeout to 10 seconds when directly connecting to database.
Slightly improved regular expression to parse -d parameter.
Added import check for all connectors' third-party libraries.
Code refactoring:
* Moved conf.direct request to direct() function in lib/request/direct.py (code reused where needed).
* Back-delegated to generic connector close() and other methods.

plugins/generic/connector.py

@@ -22,8 +22,11 @@ with sqlmap; if not, write to the Free Software Foundation, Inc., 51
 Franklin St, Fifth Floor, Boston, MA  021101301  USA
 """
 
+import os
+
 from lib.core.data import conf
 from lib.core.data import logger
+from lib.core.exception import sqlmapFilePathException
 from lib.core.exception import sqlmapUndefinedMethod
 
 class Connector:
@@ -48,12 +51,29 @@ class Connector:
         logger.info(infoMsg)
         
     def closed(self):
-        self.connector = None
-        self.cursor = None
         infoMsg = "connection to %s server %s" % (conf.dbms, self.hostname)
         infoMsg += ":%d closed" % self.port
         logger.info(infoMsg)
 
+        self.connector = None
+        self.cursor = None
+
+    def setCursor(self):
+        self.cursor = self.connector.cursor()
+
+    def getCursor(self):
+        return self.cursor
+
+    def close(self):
+        self.cursor.close()
+        self.connector.close()
+        self.closed()
+
+    def checkFileDb(self):
+        if not os.path.exists(self.db):
+            errMsg = "the provided database file '%s' does not exist" % self.db
+            raise sqlmapFilePathException, errMsg
+
     def connect(self):
         errMsg  = "'connect' method must be defined "
         errMsg += "into the specific DBMS plugin"
@@ -73,16 +93,3 @@ class Connector:
         errMsg  = "'select' method must be defined "
         errMsg += "into the specific DBMS plugin"
         raise sqlmapUndefinedMethod, errMsg
-
-    def setCursor(self):
-        errMsg  = "'setCursor' method must be defined "
-        errMsg += "into the specific DBMS plugin"
-        raise sqlmapUndefinedMethod, errMsg
-
-    def getCursor(self):
-        return self.cursor
-
-    def close(self):
-        errMsg  = "'close' method must be defined "
-        errMsg += "into the specific DBMS plugin"
-        raise sqlmapUndefinedMethod, errMsg

plugins/generic/enumeration.py

@@ -149,7 +149,7 @@ class Enumeration:
             if value:
                 kb.data.cachedUsers = value
 
-        if not kb.data.cachedUsers:
+        if not kb.data.cachedUsers and not conf.direct:
             infoMsg = "fetching number of database users"
             logger.info(infoMsg)
 
@@ -232,7 +232,7 @@ class Enumeration:
                     else:
                         kb.data.cachedUsersPasswords[user].append(password)
 
-        if not kb.data.cachedUsersPasswords:
+        if not kb.data.cachedUsersPasswords and not conf.direct:
             if conf.user:
                 if "," in conf.user:
                     users = conf.user.split(",")
@@ -464,7 +464,7 @@ class Enumeration:
                     else:
                         kb.data.cachedUsersPrivileges[user] = list(privileges)
 
-        if not kb.data.cachedUsersPrivileges:
+        if not kb.data.cachedUsersPrivileges and not conf.direct:
             conditionChar = "="
 
             if conf.user:
@@ -649,7 +649,7 @@ class Enumeration:
             if value:
                 kb.data.cachedDbs = value
 
-        if not kb.data.cachedDbs:
+        if not kb.data.cachedDbs and not conf.direct:
             infoMsg = "fetching number of databases"
             logger.info(infoMsg)
 
@@ -733,7 +733,7 @@ class Enumeration:
                     else:
                         kb.data.cachedTables[db].append(table)
 
-        if not kb.data.cachedTables:
+        if not kb.data.cachedTables and not conf.direct:
             if conf.db:
                 if "," in conf.db:
                     dbs = conf.db.split(",")
@@ -881,7 +881,7 @@ class Enumeration:
                 table[conf.tbl] = columns
                 kb.data.cachedColumns[conf.db] = table
 
-        if not kb.data.cachedColumns:
+        if not kb.data.cachedColumns and not conf.direct:
             infoMsg  = "fetching number of columns "
             infoMsg += "for table '%s'" % conf.tbl
             infoMsg += " on database '%s'" % conf.db
@@ -1298,8 +1298,10 @@ class Enumeration:
             colList = conf.col.split(",")
             kb.data.cachedColumns[conf.db] = {}
             kb.data.cachedColumns[conf.db][conf.tbl] = {}
+
             for column in colList:
                 kb.data.cachedColumns[conf.db][conf.tbl][column] = None
+
         elif not kb.data.cachedColumns:
             if kb.dbms == "MySQL" and not kb.data.has_information_schema:
                 errMsg  = "information_schema not available, "
@@ -1359,7 +1361,7 @@ class Enumeration:
 
                     index += 1
 
-        if not kb.data.dumpedTable:
+        if not kb.data.dumpedTable and not conf.direct:
             infoMsg = "fetching number of "
             if conf.col:
                 infoMsg += "columns '%s' " % colString