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Support Twofish and Blowfish

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This commit is contained in:
Stephen Paul Weber 2018-07-25 11:06:49 -05:00
parent d756110821
commit 5a6b605710
4 changed files with 45 additions and 19 deletions
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42
lib/openpgp_crypt_symmetric.php
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@ -1,12 +1,11 @@
<?php
use phpseclib\Crypt\TripleDES as Crypt_TripleDES;
use phpseclib\Crypt\AES as Crypt_AES;
use phpseclib\Crypt\Blowfish as Crypt_Blowfish;
use phpseclib\Crypt\TripleDES as Crypt_TripleDES;
use phpseclib\Crypt\Twofish as Crypt_Twofish;
use phpseclib\Crypt\Random;
define('CRYPT_DES_MODE_CFB', Crypt_TripleDES::MODE_CFB);
define('CRYPT_AES_MODE_CFB', Crypt_AES::MODE_CFB);
require_once dirname(__FILE__).'/openpgp.php';
@include_once dirname(__FILE__).'/openpgp_crypt_rsa.php';
@include_once dirname(__FILE__).'/openpgp_mcrypt_wrapper.php';
@ -146,13 +145,13 @@ class OpenPGP_Crypt_Symmetric {
public static function getCipher($algo) {
$cipher = NULL;
switch($algo) {
case NULL:
case 0:
throw new Exception("Data is already unencrypted");
case NULL:
case 0:
throw new Exception("Data is already unencrypted");
case 2:
$cipher = new Crypt_TripleDES(CRYPT_DES_MODE_CFB);
$key_bytes = 24;
$key_block_bytes = 8;
$cipher = new Crypt_TripleDES(Crypt_TripleDES::MODE_CFB);
$key_bytes = 24;
$key_block_bytes = 8;
break;
case 3:
if(defined('MCRYPT_CAST_128')) {
@ -161,17 +160,30 @@ class OpenPGP_Crypt_Symmetric {
throw new Exception("Unsupported cipher: you must have mcrypt installed to use CAST5");
}
break;
case 4:
$cipher = new Crypt_Blowfish(Crypt_Blowfish::MODE_CFB);
$key_bytes = 16;
$key_block_bytes = 8;
break;
case 7:
$cipher = new Crypt_AES(CRYPT_AES_MODE_CFB);
$cipher->setKeyLength(128);
$cipher = new Crypt_AES(Crypt_AES::MODE_CFB);
$cipher->setKeyLength(128);
break;
case 8:
$cipher = new Crypt_AES(CRYPT_AES_MODE_CFB);
$cipher->setKeyLength(192);
$cipher = new Crypt_AES(Crypt_AES::MODE_CFB);
$cipher->setKeyLength(192);
break;
case 9:
$cipher = new Crypt_AES(CRYPT_AES_MODE_CFB);
$cipher = new Crypt_AES(Crypt_AES::MODE_CFB);
$cipher->setKeyLength(256);
break;
case 10:
$cipher = new Crypt_Twofish(Crypt_Twofish::MODE_CFB);
if(method_exists($cipher, 'setKeyLength')) {
$cipher->setKeyLength(256);
} else {
$cipher = NULL;
}
break;
}
if(!$cipher) return array(NULL, NULL, NULL); // Unsupported cipher

1
tests/data/symmetric-blowfish.gpg Normal file
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@ -0,0 +1 @@
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3
tests/data/symmetric-twofish.gpg Normal file
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@ -0,0 +1,3 @@
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18
tests/phpseclib_suite.php
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@ -76,10 +76,6 @@ class Decryption extends PHPUnit_Framework_TestCase {
}
}
public function testDecryptAES() {
$this->oneSymmetric("hello", "PGP\n", "symmetric-aes.gpg");
}
public function testDecrypt3DES() {
$this->oneSymmetric("hello", "PGP\n", "symmetric-3des.gpg");
}
@ -88,6 +84,20 @@ class Decryption extends PHPUnit_Framework_TestCase {
$this->oneSymmetric("hello", "PGP\n", "symmetric-cast5.gpg");
}
public function testDecryptBlowfish() {
$this->oneSymmetric("hello", "PGP\n", "symmetric-blowfish.gpg");
}
public function testDecryptAES() {
$this->oneSymmetric("hello", "PGP\n", "symmetric-aes.gpg");
}
public function testDecryptTwofish() {
if(OpenPGP_Crypt_Symmetric::getCipher(10)[0]) {
$this->oneSymmetric("hello", "PGP\n", "symmetric-twofish.gpg");
}
}
public function testDecryptSessionKey() {
$this->oneSymmetric("hello", "PGP\n", "symmetric-with-session-key.gpg");
}