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RSA: add "none" encryption mode

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This commit is contained in:
terrafrost 2015-05-25 22:30:38 -05:00
parent e3d251ac57
commit 1d924cfc7b
2 changed files with 63 additions and 0 deletions
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33
phpseclib/Crypt/RSA.php
View File

@ -107,6 +107,13 @@ define('CRYPT_RSA_ENCRYPTION_OAEP', 1);
* compatibility with protocols (like SSH-1) written before OAEP's introduction.
*/
define('CRYPT_RSA_ENCRYPTION_PKCS1', 2);
/**
* Do not use any padding
*
* Although this method is not recommended it can none-the-less sometimes be useful if you're trying to decrypt some legacy
* stuff, if you're trying to diagnose why an encrypted message isn't decrypting, etc.
*/
define('CRYPT_RSA_ENCRYPTION_NONE', 3);
/**#@-*/
/**#@+
@ -2444,6 +2451,22 @@ class Crypt_RSA
return substr($m, 1);
}
/**
* Raw Encryption / Decryption
*
* Doesn't use padding and is not recommended.
*
* @access private
* @param String $m
* @return String
*/
function _raw_encrypt($m)
{
$temp = $this->_os2ip($m);
$temp = $this->_rsaep($temp);
return $this->_i2osp($temp, $this->k);
}
/**
* RSAES-PKCS1-V1_5-ENCRYPT
*
@ -2890,6 +2913,13 @@ class Crypt_RSA
function encrypt($plaintext)
{
switch ($this->encryptionMode) {
case CRYPT_RSA_ENCRYPTION_NONE:
$plaintext = str_split($plaintext, $this->k);
$ciphertext = '';
foreach ($plaintext as $m) {
$ciphertext.= $this->_raw_encrypt($m);
}
return $ciphertext;
case CRYPT_RSA_ENCRYPTION_PKCS1:
$length = $this->k - 11;
if ($length <= 0) {
@ -2938,6 +2968,9 @@ class Crypt_RSA
$plaintext = '';
switch ($this->encryptionMode) {
case CRYPT_RSA_ENCRYPTION_NONE:
$decrypt = '_raw_encrypt';
break;
case CRYPT_RSA_ENCRYPTION_PKCS1:
$decrypt = '_rsaes_pkcs1_v1_5_decrypt';
break;

30
tests/Unit/Crypt/RSA/ModeTest.php Normal file
View File

@ -0,0 +1,30 @@
<?php
/**
* @author Jim Wigginton <terrafrost@php.net>
* @copyright 2013 Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
*/
require_once 'Crypt/RSA.php' ;
class Unit_Crypt_RSA_ModeTest extends PhpseclibTestCase
{
public function testEncryptionModeNone()
{
$plaintext = 'a';
$rsa = new Crypt_RSA();
extract($rsa->createKey());
$rsa->loadKey($publickey);
$rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_NONE);
$a = $rsa->encrypt($plaintext);
$b = $rsa->encrypt($plaintext);
$this->assertEquals($a, $b);
$rsa->loadKey($privatekey);
$this->assertEquals(trim($rsa->decrypt($a), "\0"), $plaintext);
}
}