Class: RouterCrypt::JunOS

Inherits:
Object
  • Object
show all
Defined in:
lib/junos/decrypt.rb,
lib/junos/common.rb,
lib/junos/crypt.rb

Defined Under Namespace

Classes: InvalidPW

Constant Summary collapse

ENCODE = 
[
  [ 1,  4, 32 ],
  [ 1, 16, 32 ],
  [ 1,  8, 32 ],
  [ 1, 64     ],
  [ 1, 32     ],
  [ 1, 4, 16, 128 ],
  [ 1, 32, 64 ],
]
EXTRA = 
{}
KEY = 
%w( QzF3n6/9CAtpu0O B1IREhcSyrleKvMW8LXx 7N-dVbwsY2g4oaJZGUDj iHkq.mPf5T )
KEYCHAR = 
KEY.join.each_char.to_a
CHARKEY = 
{}

Class Method Summary collapse

Class Method Details

.crypt(plaintext, *opts) ⇒ String

Encrypts JunOS $9$ style passwords. This is reimplementation of CPAN Crypt::Juniper (by Kevin Brintnall, <kbrint at rufus.net>) ”juniper_crypt’ function



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# File 'lib/junos/crypt.rb', line 8

def crypt (plaintext, *opts)
  salt = opts[0] ? opts[0][0] : randc(1)
  rand = randc(EXTRA[salt])

  prev = salt
  crypt="$9$"
  crypt<<salt
  crypt<<rand

  plaintext.chars.each_with_index do |p, pos|
    encode = ENCODE[ pos % ENCODE.length]
    crypt<< gap_encode(p, prev, encode)
    prev = crypt[crypt.size-1]
  end

  crypt
end

.decrypt(e_pw) ⇒ String

Decrypts JunOS $9$ style passwords. This is reimplementation of CPAN Crypt::Juniper (by Kevin Brintnall, <kbrint at rufus.net>) ”juniper_decrypt’ function



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# File 'lib/junos/decrypt.rb', line 8

def decrypt e_pw
  e_pw  = e_pw[3..-1] if e_pw['$9$']
  d_pw  = ''
  prev  = nibble e_pw, 1
  nibble e_pw, EXTRA[prev]
  
  while e_pw.size > 0
    decode = ENCODE[d_pw.size % ENCODE.size]
    gaps   = nibble(e_pw, decode.size).each_char.map do |e|
      g    = gap e, prev
      prev = e
      g
    end
    d_pw += gap_decode gaps, decode
  end

  d_pw
end