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SSH2: add twofish support

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This commit is contained in:
terrafrost 2013-05-03 01:45:09 -05:00
parent 3ac29adff1
commit 2c43e9151c
1 changed files with 71 additions and 12 deletions
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83
phpseclib/Net/SSH2.php
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@ -112,6 +112,13 @@ if (!class_exists('Crypt_AES')) {
require_once('Crypt/AES.php');
}
/**
* Include Crypt_Twofish
*/
if (!class_exists('Crypt_Twofish')) {
require_once('Crypt/Twofish.php');
}
/**#@+
* Execution Bitmap Masks
*
@ -966,24 +973,36 @@ class Net_SSH2 {
);
static $encryption_algorithms = array(
/*
// from <http://tools.ietf.org/html/rfc4345#section-4>:
'arcfour256',
'arcfour128',
'arcfour', // OPTIONAL the ARCFOUR stream cipher with a 128-bit key
'arcfour', // OPTIONAL the ARCFOUR stream cipher with a 128-bit key
'aes128-cbc', // RECOMMENDED AES with a 128-bit key
'aes192-cbc', // OPTIONAL AES with a 192-bit key
'aes256-cbc', // OPTIONAL AES in CBC mode, with a 256-bit key
// CTR modes from <http://tools.ietf.org/html/rfc4344#section-4>:
'aes128-ctr', // RECOMMENDED AES (Rijndael) in SDCTR mode, with 128-bit key
'aes192-ctr', // RECOMMENDED AES with 192-bit key
'aes256-ctr', // RECOMMENDED AES with 256-bit key
// from <http://tools.ietf.org/html/rfc4344#section-4>:
'aes128-ctr', // RECOMMENDED AES (Rijndael) in SDCTR mode, with 128-bit key
'aes192-ctr', // RECOMMENDED AES with 192-bit key
'aes256-ctr', // RECOMMENDED AES with 256-bit key
'3des-ctr', // RECOMMENDED Three-key 3DES in SDCTR mode
'twofish128-ctr', // OPTIONAL Twofish in SDCTR mode, with 128-bit key
'twofish192-ctr', // OPTIONAL Twofish with 192-bit key
'twofish256-ctr', // OPTIONAL Twofish with 256-bit key
'3des-cbc', // REQUIRED three-key 3DES in CBC mode
'none' // OPTIONAL no encryption; NOT RECOMMENDED
'aes128-cbc', // RECOMMENDED AES with a 128-bit key
'aes192-cbc', // OPTIONAL AES with a 192-bit key
'aes256-cbc', // OPTIONAL AES in CBC mode, with a 256-bit key
*/
'twofish128-cbc', // OPTIONAL Twofish with a 128-bit key
'twofish192-cbc', // OPTIONAL Twofish with a 192-bit key
'twofish256-cbc',
'twofish-cbc', // OPTIONAL alias for "twofish256-cbc"
// (this is being retained for historical reasons)
'3des-ctr', // RECOMMENDED Three-key 3DES in SDCTR mode
'3des-cbc', // REQUIRED three-key 3DES in CBC mode
'none' // OPTIONAL no encryption; NOT RECOMMENDED
);
static $mac_algorithms = array(
@ -1092,14 +1111,21 @@ class Net_SSH2 {
break;
case 'aes256-cbc':
case 'aes256-ctr':
case 'twofish-cbc':
case 'twofish256-cbc':
case 'twofish256-ctr':
$decryptKeyLength = 32; // eg. 256 / 8
break;
case 'aes192-cbc':
case 'aes192-ctr':
case 'twofish192-cbc':
case 'twofish192-ctr':
$decryptKeyLength = 24; // eg. 192 / 8
break;
case 'aes128-cbc':
case 'aes128-ctr':
case 'twofish128-cbc':
case 'twofish128-ctr':
$decryptKeyLength = 16; // eg. 128 / 8
break;
case 'arcfour':
@ -1123,14 +1149,21 @@ class Net_SSH2 {
switch ($encrypt) {
case '3des-cbc':
case '3des-ctr':
case 'twofish-cbc':
case 'twofish256-cbc':
case 'twofish256-ctr':
$encryptKeyLength = 24;
break;
case 'aes256-cbc':
case 'aes256-ctr':
case 'twofish192-cbc':
case 'twofish192-ctr':
$encryptKeyLength = 32;
break;
case 'aes192-cbc':
case 'aes192-ctr':
case 'twofish128-cbc':
case 'twofish128-ctr':
$encryptKeyLength = 24;
break;
case 'aes128-cbc':
@ -1307,6 +1340,19 @@ class Net_SSH2 {
$this->encrypt = new Crypt_AES(CRYPT_AES_MODE_CTR);
$this->encrypt_block_size = 16; // eg. 128 / 8
break;
case 'twofish128-cbc':
case 'twofish192-cbc':
case 'twofish256-cbc':
case 'twofish-cbc':
$this->encrypt = new Crypt_Twofish();
$this->decrypt_block_size = 16;
break;
case 'twofish128-ctr':
case 'twofish192-ctr':
case 'twofish256-ctr':
$this->encrypt = new Crypt_Twofish(CRYPT_TWOFISH_MODE_CTR);
$this->decrypt_block_size = 16;
break;
case 'arcfour':
case 'arcfour128':
case 'arcfour256':
@ -1335,6 +1381,19 @@ class Net_SSH2 {
$this->decrypt = new Crypt_AES(CRYPT_AES_MODE_CTR);
$this->decrypt_block_size = 16;
break;
case 'twofish128-cbc':
case 'twofish192-cbc':
case 'twofish256-cbc':
case 'twofish-cbc':
$this->decrypt = new Crypt_Twofish();
$this->decrypt_block_size = 16;
break;
case 'twofish128-ctr':
case 'twofish192-ctr':
case 'twofish256-ctr':
$this->decrypt = new Crypt_Twofish(CRYPT_TWOFISH_MODE_CTR);
$this->decrypt_block_size = 16;
break;
case 'arcfour':
case 'arcfour128':
case 'arcfour256':
@ -3223,4 +3282,4 @@ class Net_SSH2 {
}
return $this->exit_status;
}
}
}