Class: UnixCrypt::MD5

Inherits:
Base
  • Object
show all
Defined in:
lib/unix_crypt/md5.rb

Class Method Summary collapse

Methods inherited from Base

bit_specified_base64encode, build, construct_password, generate_salt, hash, prepare_password, rounds_marker

Class Method Details

.byte_indexes ⇒ Object 



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# 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 ⇒ Object 



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# File 'lib/unix_crypt/md5.rb', line 5

def self.default_salt_length; 8; end

.digest ⇒ Object 



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# File 'lib/unix_crypt/md5.rb', line 3

def self.digest; Digest::MD5; end

.identifier ⇒ Object 



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# File 'lib/unix_crypt/md5.rb', line 7

def self.identifier; 1; end

.internal_hash(password, salt, ignored = nil) ⇒ Object 



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# 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 ⇒ Object 



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# File 'lib/unix_crypt/md5.rb', line 4

def self.length; 16; end

.max_salt_length ⇒ Object 



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# File 'lib/unix_crypt/md5.rb', line 6

def self.max_salt_length; 8; end