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phpseclib/tests/Unit/Crypt/AES/TestCase.php
Jakob Gahde 8e6948fdd2
Backport CFB8 support from master
2018-03-27 04:32:16 +02:00

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<?php
/**
* @author Andreas Fischer <bantu@phpbb.com>
* @copyright 2013 Andreas Fischer
* @license http://www.opensource.org/licenses/mit-license.html MIT License
*/
use phpseclib\Crypt\AES;
use phpseclib\Crypt\Base;
use phpseclib\Crypt\Rijndael;
abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
{
protected $engine;
private function _checkEngine($aes)
{
if ($aes->getEngine() != $this->engine) {
$engine = 'internal';
switch ($this->engine) {
case Base::ENGINE_OPENSSL:
$engine = 'OpenSSL';
break;
case Base::ENGINE_MCRYPT:
$engine = 'mcrypt';
}
self::markTestSkipped('Unable to initialize ' . $engine . ' engine');
}
}
/**
* Produces all combinations of test values.
*
* @return array
*/
public function continuousBufferCombos()
{
$modes = array(
Base::MODE_CTR,
Base::MODE_OFB,
Base::MODE_CFB,
Base::MODE_CFB8,
);
$plaintexts = array(
'',
'12345678901234567', // https://github.com/phpseclib/phpseclib/issues/39
"\xDE\xAD\xBE\xAF",
':-):-):-):-):-):-)', // https://github.com/phpseclib/phpseclib/pull/43
);
$ivs = array(
'',
'test123',
);
$keys = array(
'',
':-8', // https://github.com/phpseclib/phpseclib/pull/43
'FOOBARZ',
);
$result = array();
foreach ($modes as $mode) {
foreach ($plaintexts as $plaintext) {
foreach ($ivs as $iv) {
foreach ($keys as $key) {
$result[] = array($mode, $plaintext, $iv, $key);
}
}
}
}
return $result;
}
/**
* @dataProvider continuousBufferCombos
*/
public function testEncryptDecryptWithContinuousBuffer($mode, $plaintext, $iv, $key)
{
$aes = new AES($mode);
$aes->setPreferredEngine($this->engine);
$aes->enableContinuousBuffer();
$aes->setIV($iv);
$aes->setKey($key);
$this->_checkEngine($aes);
$actual = '';
for ($i = 0, $strlen = strlen($plaintext); $i < $strlen; ++$i) {
$actual .= $aes->decrypt($aes->encrypt($plaintext[$i]));
}
$this->assertEquals($plaintext, $actual);
}
/**
* @group github451
*/
public function testKeyPaddingRijndael()
{
// this test case is from the following URL:
// https://web.archive.org/web/20070209120224/http://fp.gladman.plus.com/cryptography_technology/rijndael/aesdvec.zip
$aes = new Rijndael();
$aes->setPreferredEngine($this->engine);
$aes->disablePadding();
$aes->setKey(pack('H*', '2b7e151628aed2a6abf7158809cf4f3c762e7160')); // 160-bit key. Valid in Rijndael.
//$this->_checkEngine($aes); // should only work in internal mode
$ciphertext = $aes->encrypt(pack('H*', '3243f6a8885a308d313198a2e0370734'));
$this->assertEquals($ciphertext, pack('H*', '231d844639b31b412211cfe93712b880'));
}
/**
* @group github451
*/
public function testKeyPaddingAES()
{
// same as the above - just with a different ciphertext
$aes = new AES();
$aes->setPreferredEngine($this->engine);
$aes->disablePadding();
$aes->setKey(pack('H*', '2b7e151628aed2a6abf7158809cf4f3c762e7160')); // 160-bit key. AES should null pad to 192-bits
$this->_checkEngine($aes);
$ciphertext = $aes->encrypt(pack('H*', '3243f6a8885a308d313198a2e0370734'));
$this->assertEquals($ciphertext, pack('H*', 'c109292b173f841b88e0ee49f13db8c0'));
}
/**
* Produces all combinations of test values.
*
* @return array
*/
public function continuousBufferBatteryCombos()
{
$modes = array(
Base::MODE_CTR,
Base::MODE_OFB,
Base::MODE_CFB,
Base::MODE_CFB8,
);
$combos = array(
array(16),
array(17),
array(1, 16),
array(3, 6, 7), // (3 to test the openssl_encrypt call and the buffer creation, 6 to test the exclusive use of the buffer and 7 to test the buffer's exhaustion and recreation)
array(15, 4), // (15 to test openssl_encrypt call and buffer creation and 4 to test something that spans multpile bloc
array(3, 6, 10, 16), // this is why the strlen check in the buffer-only code was needed
array(16, 16), // two full size blocks
array(3, 6, 7, 16), // partial block + full size block
array(16, 3, 6, 7),
// a few others just for fun
array(32,32),
array(31,31),
array(17,17),
array(99, 99)
);
$result = array();
foreach ($modes as $mode) {
foreach ($combos as $combo) {
foreach (array('encrypt', 'decrypt') as $op) {
$result[] = array($op, $mode, $combo);
}
}
}
return $result;
}
/**
* @dataProvider continuousBufferBatteryCombos
*/
public function testContinuousBufferBattery($op, $mode, $test)
{
$iv = str_repeat('x', 16);
$key = str_repeat('a', 16);
$aes = new AES($mode);
$aes->setPreferredEngine($this->engine);
$aes->setKey($key);
$aes->setIV($iv);
$this->_checkEngine($aes);
$str = '';
$result = '';
foreach ($test as $len) {
$temp = str_repeat('d', $len);
$str.= $temp;
}
$c1 = $aes->$op($str);
$aes = new AES($mode);
$aes->setPreferredEngine($this->engine);
$aes->enableContinuousBuffer();
$aes->setKey($key);
$aes->setIV($iv);
if (!$this->_checkEngine($aes)) {
return;
}
foreach ($test as $len) {
$temp = str_repeat('d', $len);
$output = $aes->$op($temp);
$result.= $output;
}
$c2 = $result;
$this->assertSame(bin2hex($c1), bin2hex($c2));
}
/**
* Pretty much the same as testContinuousBufferBattery with the caveat that continuous mode is not enabled.
*
* @dataProvider continuousBufferBatteryCombos
*/
public function testNonContinuousBufferBattery($op, $mode, $test)
{
if (count($test) == 1) {
return;
}
$iv = str_repeat('x', 16);
$key = str_repeat('a', 16);
$aes = new AES($mode);
$aes->setPreferredEngine($this->engine);
$aes->setKey($key);
$aes->setIV($iv);
$this->_checkEngine($aes);
$str = '';
$result = '';
foreach ($test as $len) {
$temp = str_repeat('d', $len);
$str.= $temp;
}
$c1 = $aes->$op($str);
$aes = new AES($mode);
$aes->setPreferredEngine($this->engine);
$aes->setKey($key);
$aes->setIV($iv);
$this->_checkEngine($aes);
foreach ($test as $len) {
$temp = str_repeat('d', $len);
$output = $aes->$op($temp);
$result.= $output;
}
$c2 = $result;
$this->assertNotSame(bin2hex($c1), bin2hex($c2));
}
// from http://csrc.nist.gov/groups/STM/cavp/documents/aes/AESAVS.pdf#page=16
public function testGFSBox128()
{
$aes = new AES();
$aes->setKey(pack('H*', '00000000000000000000000000000000'));
$aes->setIV(pack('H*', '00000000000000000000000000000000'));
$aes->disablePadding();
$aes->setPreferredEngine($this->engine);
$this->_checkEngine($aes);
$result = bin2hex($aes->encrypt(pack('H*', 'f34481ec3cc627bacd5dc3fb08f273e6')));
$this->assertSame($result, '0336763e966d92595a567cc9ce537f5e');
$result = bin2hex($aes->encrypt(pack('H*', '9798c4640bad75c7c3227db910174e72')));
$this->assertSame($result, 'a9a1631bf4996954ebc093957b234589');
$result = bin2hex($aes->encrypt(pack('H*', '96ab5c2ff612d9dfaae8c31f30c42168')));
$this->assertSame($result, 'ff4f8391a6a40ca5b25d23bedd44a597');
$result = bin2hex($aes->encrypt(pack('H*', '6a118a874519e64e9963798a503f1d35')));
$this->assertSame($result, 'dc43be40be0e53712f7e2bf5ca707209');
$result = bin2hex($aes->encrypt(pack('H*', 'cb9fceec81286ca3e989bd979b0cb284')));
$this->assertSame($result, '92beedab1895a94faa69b632e5cc47ce');
$result = bin2hex($aes->encrypt(pack('H*', 'b26aeb1874e47ca8358ff22378f09144')));
$this->assertSame($result, '459264f4798f6a78bacb89c15ed3d601');
$result = bin2hex($aes->encrypt(pack('H*', '58c8e00b2631686d54eab84b91f0aca1')));
$this->assertSame($result, '08a4e2efec8a8e3312ca7460b9040bbf');
}
public function testGFSBox192()
{
$aes = new AES();
$aes->setKey(pack('H*', '000000000000000000000000000000000000000000000000'));
$aes->setIV(pack('H*', '00000000000000000000000000000000'));
$aes->disablePadding();
$aes->setPreferredEngine($this->engine);
$this->_checkEngine($aes);
$result = bin2hex($aes->encrypt(pack('H*', '1b077a6af4b7f98229de786d7516b639')));
$this->assertSame($result, '275cfc0413d8ccb70513c3859b1d0f72');
$result = bin2hex($aes->encrypt(pack('H*', '9c2d8842e5f48f57648205d39a239af1')));
$this->assertSame($result, 'c9b8135ff1b5adc413dfd053b21bd96d');
$result = bin2hex($aes->encrypt(pack('H*', 'bff52510095f518ecca60af4205444bb')));
$this->assertSame($result, '4a3650c3371ce2eb35e389a171427440');
$result = bin2hex($aes->encrypt(pack('H*', '51719783d3185a535bd75adc65071ce1')));
$this->assertSame($result, '4f354592ff7c8847d2d0870ca9481b7c');
$result = bin2hex($aes->encrypt(pack('H*', '26aa49dcfe7629a8901a69a9914e6dfd')));
$this->assertSame($result, 'd5e08bf9a182e857cf40b3a36ee248cc');
$result = bin2hex($aes->encrypt(pack('H*', '941a4773058224e1ef66d10e0a6ee782')));
$this->assertSame($result, '067cd9d3749207791841562507fa9626');
}
public function testGFSBox256()
{
$aes = new AES();
$aes->setKey(pack('H*', '00000000000000000000000000000000' . '00000000000000000000000000000000'));
$aes->setIV(pack('H*', '00000000000000000000000000000000'));
$aes->disablePadding();
$aes->setPreferredEngine($this->engine);
$this->_checkEngine($aes);
$result = bin2hex($aes->encrypt(pack('H*', '014730f80ac625fe84f026c60bfd547d')));
$this->assertSame($result, '5c9d844ed46f9885085e5d6a4f94c7d7');
$result = bin2hex($aes->encrypt(pack('H*', '0b24af36193ce4665f2825d7b4749c98')));
$this->assertSame($result, 'a9ff75bd7cf6613d3731c77c3b6d0c04');
$result = bin2hex($aes->encrypt(pack('H*', '761c1fe41a18acf20d241650611d90f1')));
$this->assertSame($result, '623a52fcea5d443e48d9181ab32c7421');
$result = bin2hex($aes->encrypt(pack('H*', '8a560769d605868ad80d819bdba03771')));
$this->assertSame($result, '38f2c7ae10612415d27ca190d27da8b4');
$result = bin2hex($aes->encrypt(pack('H*', '91fbef2d15a97816060bee1feaa49afe')));
$this->assertSame($result, '1bc704f1bce135ceb810341b216d7abe');
}
public function testGetKeyLengthDefault()
{
$aes = new AES();
$this->assertSame($aes->getKeyLength(), 128);
}
public function testGetKeyLengthWith192BitKey()
{
$aes = new AES();
$aes->setKey(str_repeat('a', 24));
$this->assertSame($aes->getKeyLength(), 192);
}
public function testSetKeyLengthWithLargerKey()
{
$aes = new AES();
$aes->setKeyLength(128);
$aes->setKey(str_repeat('a', 24));
$this->assertSame($aes->getKeyLength(), 128);
$ciphertext = bin2hex($aes->encrypt('a'));
$this->assertSame($ciphertext, '82b7b068dfc60ed2a46893b69fecd6c2');
$this->assertSame($aes->getKeyLength(), 128);
}
public function testSetKeyLengthWithSmallerKey()
{
$aes = new AES();
$aes->setKeyLength(256);
$aes->setKey(str_repeat('a', 16));
$this->assertSame($aes->getKeyLength(), 256);
$ciphertext = bin2hex($aes->encrypt('a'));
$this->assertSame($ciphertext, 'fd4250c0d234aa7e1aa592820aa8406b');
$this->assertSame($aes->getKeyLength(), 256);
}
/**
* @group github938
*/
public function testContinuousBuffer()
{
$aes = new AES();
$aes->disablePadding();
$aes->enableContinuousBuffer();
$aes->setIV(pack('H*', '0457bdb4a6712986688349a29eb82535'));
$aes->setKey(pack('H*', '00d596e2c8189b2592fac358e7396ad2'));
$aes->decrypt(pack('H*', '9aa234ea7c750a8109a0f32d768b964e'));
$plaintext = $aes->decrypt(pack('H*', '0457bdb4a6712986688349a29eb82535'));
$expected = pack('H*', '6572617574689e1be8d2d8d43c594cf3');
$this->assertSame($plaintext, $expected);
}
}
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