Class Horde_Cipher_des

Description

The Cipher_des:: class implements the Cipher interface encryption data using the Data Encryption Standard (DES) algorithm as define in FIPS46-3.

$Horde: framework/Cipher/Cipher/des.php,v 1.4.12.11 2009/01/06 15:22:57 jan Exp $

Copyright 2003-2009 The Horde Project (http://www.horde.org/)

See the enclosed file COPYING for license information (LGPL). If you did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.

Located in /Cipher/Cipher/des.php (line 17)

Horde_Cipher
   |
   --Horde_Cipher_des
Variable Summary
 array $e
 array $fp
 array $ip
 array $p
 array $pc1
 array $pc2
 array $shifts
 array $_Ks
 array $_s
Method Summary
 string decryptBlock (string $block, [string $key = null])
 string encryptBlock (string $block, [string $key = null])
 integer getBlockSize ()
 void setKey (string $key)
 string _f (string $input, integer $round)
 string _finalPerm (string $input)
 string _initialPerm (string $input)
 array _keySchedule (string $key)
Variables
array $e = array(
32, 1, 2, 3, 4, 5,
4, 5, 6, 7, 8, 9,
8, 9, 10, 11, 12, 13,
12, 13, 14, 15, 16, 17,
16, 17, 18, 19, 20, 21,
20, 21, 22, 23, 24, 25,
24, 25, 26, 27, 28, 29,
28, 29, 30, 31, 32, 1
)
(line 56)

E Bit Selection Table

array $fp = array(
40, 8, 48, 16, 56, 24, 64, 32,
39, 7, 47, 15, 55, 23, 63, 31,
38, 6, 46, 14, 54, 22, 62, 30,
37, 5, 45, 13, 53, 21, 61, 29,
36, 4, 44, 12, 52, 20, 60, 28,
35, 3, 43, 11, 51, 19, 59, 27,
34, 2, 42, 10, 50, 18, 58, 26,
33, 1, 41, 9, 49, 17, 57, 25
)
(line 40)

Final Permutation IP^-1

array $ip = array(
58, 50, 42, 34, 26, 18, 10, 2,
60, 52, 44, 36, 28, 20, 12, 4,
62, 54, 46, 38, 30, 22, 14, 6,
64, 56, 48, 40, 32, 24, 16, 8,
57, 49, 41, 33, 25, 17, 9, 1,
59, 51, 43, 35, 27, 19, 11, 3,
61, 53, 45, 37, 29, 21, 13, 5,
63, 55, 47, 39, 31, 23, 15, 7
)
(line 24)

Initial Permutation

array $p = array(
16, 7, 20, 21,
29, 12, 28, 17,
1, 15, 23, 26,
5, 18, 31, 10,
2, 8, 24, 14,
32, 27, 3, 9,
19, 13, 30, 6,
22, 11, 4, 25
)
(line 143)

Primitive function

array $pc1 = array(
57, 49, 41, 33, 25, 17, 9,
1, 58, 50, 42, 34, 26, 18,
10, 2, 59, 51, 43, 35, 27,
19, 11, 3, 60, 52, 44, 36,

63, 55, 47, 39, 31, 23, 15,
7, 62, 54, 46, 38, 30, 22,
14, 6, 61, 53, 45, 37, 29,
21, 13, 5, 28, 20, 12, 4
)
(line 159)

Permuted Choice Table

array $pc2 = array(
14, 17, 11, 24, 1, 5,
3, 28, 15, 6, 21, 10,
23, 19, 12, 4, 26, 8,
16, 7, 27, 20, 13, 2,
41, 52, 31, 37, 47, 55,
30, 40, 51, 45, 33, 48,
44, 49, 39, 56, 34, 53,
46, 42, 50, 36, 29, 32
)
(line 186)

Permuted Choice Table 2

array $shifts = array(
1, 1, 2, 2, 2, 2, 2, 2,
1, 2, 2, 2, 2, 2, 2, 1
)
(line 176)

Number left rotations of pc1

array $_Ks = array() (line 202)

Key Schedule

array $_s = array(
/* S1 */
1 => array(
14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
),/* S2 */2=>array(15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10,3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9,),/* S3 */3=>array(10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8,13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1,13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7,1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12,),/* S4 */4=>array(7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15,13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9,10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4,3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14,),/* S5 */5=>array(2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6,4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14,11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3,),/* S6 */6=>array(12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8,9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6,4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13,),/* S7 */7=>array(4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1,13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6,1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2,6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12,),/* S8 */8=>array(13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7,1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2,7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8,2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11))
(line 72)

S boxes

Inherited Variables

Inherited from Horde_Cipher

Horde_Cipher::$_blockMode
Horde_Cipher::$_iv
Methods
decryptBlock (line 267)

Decrypt a block of data.

  • return: The decrypted output.
string decryptBlock (string $block, [string $key = null])
  • string $block: The data to decrypt.
  • string $key: The key to use.
encryptBlock (line 234)

Encrypt a block of data.

  • return: The encrypted output.
string encryptBlock (string $block, [string $key = null])
  • string $block: The data to encrypt.
  • string $key: The key to use.
getBlockSize (line 221)

Return the size of the blocks that this cipher needs.

  • return: The number of characters per block.
integer getBlockSize ()
setKey (line 209)

Set the key to be used for en/decryption.

void setKey (string $key)
  • string $key: The key to use.
_f (line 358)

f() The permutation function.

  • return: The output string.
string _f (string $input, integer $round)
  • string $input: Input string.
  • integer $round: The round.
_finalPerm (line 328)

Put an input string through a final permutation.

  • return: Permutated string.
string _finalPerm (string $input)
  • string $input: Input string.
_initialPerm (line 299)

Put an input string through an initial permutation

  • return: Permutated string.
string _initialPerm (string $input)
  • string $input: Input string.
_keySchedule (line 406)

Create the complete key shedule.

  • return: Key schedule.
array _keySchedule (string $key)
  • string $key: The key to use.

Inherited Methods

Inherited From Horde_Cipher

 Horde_Cipher::decrypt()
 Horde_Cipher::encrypt()
 Horde_Cipher::factory()
 Horde_Cipher::setBlockMode()
 Horde_Cipher::setIV()

Documentation generated on Sun, 30 Jan 2011 05:16:45 +0000 by phpDocumentor 1.4.3