查看 SecureCRT session配置文件中的密码

from Crypto.Cipher import Blowfish
import argparse
import re

def decrypt(password) :
    c1 = Blowfish.new('5F B0 45 A2 94 17 D9 16 C6 C6 A2 FF 06 41 82 B7'.replace(' ','').decode('hex'), Blowfish.MODE_CBC, '\x00'*8)
    c2 = Blowfish.new('24 A6 3D DE 5B D3 B3 82 9C 7E 06 F4 08 16 AA 07'.replace(' ','').decode('hex'), Blowfish.MODE_CBC, '\x00'*8)
    padded = c1.decrypt(c2.decrypt(password.decode('hex'))[4:-4])
    p = ''
    while padded[:2] != '\x00\x00' :
        p += padded[:2]
        padded = padded[2:]
    return p.decode('UTF-16')

REGEX_HOSTNAME = re.compile(ur'S:"Hostname"=([^\r\n]*)')
REGEX_PASWORD = re.compile(ur'S:"Password"=u([0-9a-f]+)')
REGEX_PORT = re.compile(ur'D:"\[SSH2\] Port"=([0-9a-f]{8})')
REGEX_USERNAME = re.compile(ur'S:"Username"=([^\r\n]*)')

def hostname(x) :
    m = REGEX_HOSTNAME.search(x)
    if m :
        return m.group(1)
    return '???'

def password(x) :
    m = REGEX_PASWORD.search(x)
    if m :
        return decrypt(m.group(1))
    return '???'

def port(x) :
    m = REGEX_PORT.search(x)
    if m :
        return '-p %d '%(int(m.group(1), 16))
    return ''

def username(x) :
    m = REGEX_USERNAME.search(x)
    if m :
        return m.group(1) + '@'
    return ''

parser = argparse.ArgumentParser(description='Tool to decrypt SSHv2 passwords in VanDyke Secure CRT session files')
parser.add_argument('files', type=argparse.FileType('r'), nargs='+',
    help='session file(s)')

args = parser.parse_args()

for f in args.files :
    c = f.read().replace('\x00', '')
    print f.name
    print "ssh %s%s%s # %s"%(port(c), username(c), hostname(c), password(c))