#!/usr/bin/env python

"""
$Id$

Copyright (c) 2006-2010 sqlmap developers (http://sqlmap.sourceforge.net/)
See the file 'doc/COPYING' for copying permission
"""

from hashlib import md5
from hashlib import sha1

from extra.pydes.pyDes import des
from extra.pydes.pyDes import CBC
from lib.core.convert import hexdecode
from lib.core.convert import hexencode

def mysql_passwd(password, uppercase=True):
    """
    Reference(s):
        http://csl.sublevel3.org/mysql-password-function/

    >>> mysql_passwd(password='testpass', uppercase=True)
    '*00E247AC5F9AF26AE0194B41E1E769DEE1429A29'
    """

    retVal = "*%s" % sha1(sha1(password).digest()).hexdigest()

    return retVal.upper() if uppercase else retVal.lower()

def mysql_old_passwd(password, uppercase=True): # prior to version '4.1'
    """
    Reference(s):
        http://www.sfr-fresh.com/unix/privat/tpop3d-1.5.5.tar.gz:a/tpop3d-1.5.5/password.c
        http://voidnetwork.org/5ynL0rd/darkc0de/python_script/darkMySQLi.html

    >>> mysql_old_passwd(password='testpass', uppercase=True)
    '7DCDA0D57290B453'
    """

    a, b, c = 1345345333, 7, 0x12345671

    for d in password:
        if d == ' ' or d == '\t':
            continue

        e = ord(d)
        a ^= (((a & 63) + b) * e) + (a << 8)
        c += (c << 8) ^ a
        b += e

    retVal = "%08lx%08lx" % (a & ((1 << 31) - 1), c & ((1 << 31) - 1))

    return retVal.upper() if uppercase else retVal.lower()

def postgres_passwd(password, username, uppercase=False):
    """
    Reference(s):
        http://pentestmonkey.net/blog/cracking-postgres-hashes/

    >>> postgres_passwd(password='testpass', username='testuser', uppercase=False)
    'md599e5ea7a6f7c3269995cba3927fd0093'
    """

    retVal = "md5%s" % md5(password + username).hexdigest()

    return retVal.upper() if uppercase else retVal.lower()

def mssql_passwd(password, salt, uppercase=False):
    """
    Reference(s):
        http://www.leidecker.info/projects/phrasendrescher/mssql.c
        https://www.evilfingers.com/tools/GSAuditor.php

    >>> mssql_passwd(password='testpass', salt='4086ceb6', uppercase=False)
    '0x01004086ceb60c90646a8ab9889fe3ed8e5c150b5460ece8425a'
    """

    binsalt = hexdecode(salt)
    unistr = "".join("%s\0" % c for c in password)

    retVal = "0100%s%s" % (salt, sha1(unistr + binsalt).hexdigest())

    return "0x%s" % (retVal.upper() if uppercase else retVal.lower())

def mssql_old_passwd(password, salt, uppercase=True): # prior to version '2005'
    """
    Reference(s):
        www.exploit-db.com/download_pdf/15537/
        http://www.leidecker.info/projects/phrasendrescher/mssql.c
        https://www.evilfingers.com/tools/GSAuditor.php

    >>> mssql_old_passwd(password='testpass', salt='4086ceb6', uppercase=True)
    '0x01004086CEB60C90646A8AB9889FE3ED8E5C150B5460ECE8425AC7BB7255C0C81D79AA5D0E93D4BB077FB9A51DA0'
    """

    binsalt = hexdecode(salt)
    unistr = "".join("%s\0" % c for c in password)

    retVal = "0100%s%s%s" % (salt, sha1(unistr + binsalt).hexdigest(), sha1(unistr.upper() + binsalt).hexdigest())

    return "0x%s" % (retVal.upper() if uppercase else retVal.lower())

def oracle_passwd(password, salt, uppercase=True):
    """
    Reference(s):
        https://www.evilfingers.com/tools/GSAuditor.php
        http://www.notesbit.com/index.php/scripts-oracle/oracle-11g-new-password-algorithm-is-revealed-by-seclistsorg/
        http://seclists.org/bugtraq/2007/Sep/304

    >>> oracle_passwd(password='SHAlala', salt='1B7B5F82B7235E9E182C', uppercase=True)
    'S:2BFCFDF5895014EE9BB2B9BA067B01E0389BB5711B7B5F82B7235E9E182C'
    """

    binsalt = hexdecode(salt)

    retVal="s:%s%s" % (sha1(password + binsalt).hexdigest(), salt)

    return retVal.upper() if uppercase else retVal.lower()

def oracle_old_passwd(password, username, uppercase=True): # prior to version '11g'
    """
    Reference(s):
        http://www.notesbit.com/index.php/scripts-oracle/oracle-11g-new-password-algorithm-is-revealed-by-seclistsorg/

    >>> oracle_old_passwd(password='tiger', username='scott', uppercase=True)
    'F894844C34402B67'
    """

    IV, pad = "\0"*8, "\0"
    unistr = "".join("\0%s" % c for c in (username + password).upper())

    cipher = des(hexdecode("0123456789ABCDEF"), CBC, IV, pad)
    encrypted = cipher.encrypt(unistr)
    cipher = des(encrypted[-8:], CBC, IV, pad)
    encrypted = cipher.encrypt(unistr)

    retVal = hexencode(encrypted[-8:])

    return retVal.upper() if uppercase else retVal.lower()