class UnixCrypt::MD5

Protected Class Methods

byte_indexes() click to toggle source
# File lib/unix_crypt/md5.rb, line 9
def self.byte_indexes
  [[0, 6, 12], [1, 7, 13], [2, 8, 14], [3, 9, 15], [4, 10, 5], [nil, nil, 11]]
end
default_salt_length() click to toggle source
# File lib/unix_crypt/md5.rb, line 5
def self.default_salt_length; 8; end
digest() click to toggle source
# File lib/unix_crypt/md5.rb, line 3
def self.digest; Digest::MD5; end
identifier() click to toggle source
# File lib/unix_crypt/md5.rb, line 7
def self.identifier; 1; end
internal_hash(password, salt, ignored = nil) click to toggle source
# File lib/unix_crypt/md5.rb, line 13
def self.internal_hash(password, salt, ignored = nil)
  salt = salt[0..7]

  b = digest.digest("#{password}#{salt}#{password}")
  a_string = "#{password}$1$#{salt}#{b * (password.length/length)}#{b[0...password.length % length]}"

  password_length = password.length
  while password_length > 0
    a_string += (password_length & 1 != 0) ? "\x0" : password[0].chr
    password_length >>= 1
  end

  input = digest.digest(a_string)

  1000.times do |index|
    c_string = ((index & 1 != 0) ? password : input)
    c_string += salt unless index % 3 == 0
    c_string += password unless index % 7 == 0
    c_string += ((index & 1 != 0) ? input : password)
    input = digest.digest(c_string)
  end

  input
end
length() click to toggle source
# File lib/unix_crypt/md5.rb, line 4
def self.length; 16; end
max_salt_length() click to toggle source
# File lib/unix_crypt/md5.rb, line 6
def self.max_salt_length; 8; end