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- an inability to unpad doesn't necessarily mean that padding is enabled when it shouldn't be - it might also mean that the key being used is the wrong one.

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git-svn-id: http://phpseclib.svn.sourceforge.net/svnroot/phpseclib/trunk@67 21d32557-59b3-4da0-833f-c5933fad653e
This commit is contained in:
Jim Wigginton 2009-12-06 07:26:52 +00:00
parent 793a355862
commit 9bd3c793d3
5 changed files with 71 additions and 43 deletions
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9
phpseclib/Crypt/DES.php
View File

@ -53,7 +53,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVII Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: DES.php,v 1.9 2009-11-23 19:06:06 terrafrost Exp $
* @version $Id: DES.php,v 1.10 2009-12-06 07:26:52 terrafrost Exp $
* @link http://phpseclib.sourceforge.net
*/
@ -523,7 +523,8 @@ class Crypt_DES {
/**
* Unpads a string
*
* If padding is enabled and the reported padding length is invalid, padding will be, hence forth, disabled.
* If padding is enabled and the reported padding length is invalid the encryption key will be assumed to be wrong
* and false will be returned.
*
* @see Crypt_DES::_pad()
* @access private
@ -537,9 +538,7 @@ class Crypt_DES {
$length = ord($text[strlen($text) - 1]);
if (!$length || $length > 8) {
user_error("The number of bytes reported as being padded ($length) is invalid (block size = 8)", E_USER_NOTICE);
$this->padding = false;
return $text;
return false;
}
return substr($text, 0, -$length);

81
phpseclib/Crypt/RSA.php
View File

@ -62,7 +62,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMIX Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: RSA.php,v 1.3 2009-12-04 21:05:32 terrafrost Exp $
* @version $Id: RSA.php,v 1.4 2009-12-06 07:26:52 terrafrost Exp $
* @link http://phpseclib.sourceforge.net
*/
@ -762,9 +762,10 @@ class Crypt_RSA {
$key = $des->decrypt($ciphertext);
} else {
$key = base64_decode(preg_replace('#-.+-|[\r\n]#', '', $key));
if ($key === false) {
return false;
}
}
if ($key === false) {
return false;
}
$private = false;
@ -852,6 +853,10 @@ class Crypt_RSA {
function loadKey($key, $type = CRYPT_RSA_PRIVATE_FORMAT_PKCS1)
{
$components = $this->_parseKey($key, $type);
if ($components === false) {
return false;
}
$this->modulus = $components['modulus'];
$this->k = strlen($this->modulus->toBytes());
$this->exponent = isset($components['privateExponent']) ? $components['privateExponent'] : $components['publicExponent'];
@ -906,7 +911,7 @@ class Crypt_RSA {
function setPublicKey($key, $type = CRYPT_RSA_PUBLIC_FORMAT_PKCS1)
{
$components = $this->_parseKey($key, $type);
if (!$this->modulus->equals($components['modulus'])) {
if (empty($this->modulus) || !$this->modulus->equals($components['modulus'])) {
return false;
}
$this->publicExponent = $components['publicExponent'];
@ -926,6 +931,10 @@ class Crypt_RSA {
*/
function getPublicKey($type = CRYPT_RSA_PUBLIC_FORMAT_PKCS1)
{
if (empty($this->modulus) || empty($this->publicExponent)) {
return false;
}
$oldFormat = $this->publicKeyFormat;
$this->publicKeyFormat = $type;
$temp = $this->_convertPublicKey($this->modulus, $this->publicExponent);
@ -1834,7 +1843,12 @@ class Crypt_RSA {
{
switch ($this->encryptionMode) {
case CRYPT_RSA_ENCRYPTION_PKCS1:
$plaintext = str_split($plaintext, $this->k - 11);
$length = $this->k - 11;
if ($length <= 0) {
return false;
}
$plaintext = str_split($plaintext, $length);
$ciphertext = '';
foreach ($plaintext as $m) {
$ciphertext.= $this->_rsaes_pkcs1_v1_5_encrypt($m);
@ -1842,7 +1856,12 @@ class Crypt_RSA {
return $ciphertext;
//case CRYPT_RSA_ENCRYPTION_OAEP:
default:
$plaintext = str_split($plaintext, $this->k - 2 * $this->hLen - 2);
$length = $this->k - 2 * $this->hLen - 2;
if ($length <= 0) {
return false;
}
$plaintext = str_split($plaintext, $length);
$ciphertext = '';
foreach ($plaintext as $m) {
$ciphertext.= $this->_rsaes_oaep_encrypt($m);
@ -1861,31 +1880,31 @@ class Crypt_RSA {
*/
function decrypt($ciphertext)
{
if ($this->k <= 0) {
return false;
}
$ciphertext = str_split($ciphertext, $this->k);
$plaintext = '';
switch ($this->encryptionMode) {
case CRYPT_RSA_ENCRYPTION_PKCS1:
$ciphertext = str_split($ciphertext, $this->k);
$plaintext = '';
foreach ($ciphertext as $c) {
$temp = $this->_rsaes_pkcs1_v1_5_decrypt($c);
if ($temp === false) {
return false;
}
$plaintext.= $temp;
}
return $plaintext;
$decrypt = '_rsaes_pkcs1_v1_5_decrypt';
break;
//case CRYPT_RSA_ENCRYPTION_OAEP:
default:
$ciphertext = str_split($ciphertext, $this->k);
$plaintext = '';
foreach ($ciphertext as $c) {
$temp = $this->_rsaes_oaep_decrypt($c);
if ($temp === false) {
return false;
}
$plaintext.= $temp;
}
return $plaintext;
$decrypt = '_rsaes_oaep_decrypt';
}
foreach ($ciphertext as $c) {
$temp = $this->$decrypt($c);
if ($temp === false) {
return false;
}
$plaintext.= $temp;
}
return $plaintext;
}
/**
@ -1898,6 +1917,10 @@ class Crypt_RSA {
*/
function sign($message)
{
if (empty($this->modulus) || empty($this->exponent)) {
return false;
}
switch ($this->signatureMode) {
case CRYPT_RSA_SIGNATURE_PKCS1:
return $this->_rsassa_pkcs1_v1_5_sign($message);
@ -1918,6 +1941,10 @@ class Crypt_RSA {
*/
function verify($message, $signature)
{
if (empty($this->modulus) || empty($this->exponent)) {
return false;
}
switch ($this->signatureMode) {
case CRYPT_RSA_SIGNATURE_PKCS1:
return $this->_rsassa_pkcs1_v1_5_verify($message, $signature);

9
phpseclib/Crypt/Rijndael.php
View File

@ -64,7 +64,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVIII Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: Rijndael.php,v 1.8 2009-11-23 19:06:07 terrafrost Exp $
* @version $Id: Rijndael.php,v 1.9 2009-12-06 07:26:52 terrafrost Exp $
* @link http://phpseclib.sourceforge.net
*/
@ -1034,7 +1034,8 @@ class Crypt_Rijndael {
/**
* Unpads a string.
*
* If padding is enabled and the reported padding length is invalid, padding will be, hence forth, disabled.
* If padding is enabled and the reported padding length is invalid the encryption key will be assumed to be wrong
* and false will be returned.
*
* @see Crypt_Rijndael::_pad()
* @access private
@ -1048,9 +1049,7 @@ class Crypt_Rijndael {
$length = ord($text[strlen($text) - 1]);
if (!$length || $length > $this->block_size) {
user_error("The number of bytes reported as being padded ($length) is invalid (block size = {$this->block_size})", E_USER_NOTICE);
$this->padding = false;
return $text;
return false;
}
return substr($text, 0, -$length);

9
phpseclib/Crypt/TripleDES.php
View File

@ -47,7 +47,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVII Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: TripleDES.php,v 1.9 2009-11-23 19:06:07 terrafrost Exp $
* @version $Id: TripleDES.php,v 1.10 2009-12-06 07:26:52 terrafrost Exp $
* @link http://phpseclib.sourceforge.net
*/
@ -576,7 +576,8 @@ class Crypt_TripleDES {
/**
* Unpads a string
*
* If padding is enabled and the reported padding length is invalid, padding will be, hence forth, disabled.
* If padding is enabled and the reported padding length is invalid the encryption key will be assumed to be wrong
* and false will be returned.
*
* @see Crypt_TripleDES::_pad()
* @access private
@ -590,9 +591,7 @@ class Crypt_TripleDES {
$length = ord($text[strlen($text) - 1]);
if (!$length || $length > 8) {
user_error("The number of bytes reported as being padded ($length) is invalid (block size = 8)", E_USER_NOTICE);
$this->padding = false;
return $text;
return false;
}
return substr($text, 0, -$length);

6
phpseclib/Net/SSH2.php
View File

@ -60,7 +60,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVII Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: SSH2.php,v 1.29 2009-12-03 19:04:10 terrafrost Exp $
* @version $Id: SSH2.php,v 1.30 2009-12-06 07:26:52 terrafrost Exp $
* @link http://phpseclib.sourceforge.net
*/
@ -1308,6 +1308,10 @@ class Net_SSH2 {
{
// see http://tools.ietf.org/html/rfc4253#page-15
$publickey = $privatekey->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_RAW);
if ($publickey === false) {
return false;
}
$publickey = array(
'e' => $publickey['e']->toBytes(true),
'n' => $publickey['n']->toBytes(true)