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Hash: add support for keccak256

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This commit is contained in:
terrafrost 2022-02-08 20:10:34 -06:00
parent 60edff77e6
commit f96f3505a8
2 changed files with 28 additions and 9 deletions
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17
phpseclib/Crypt/Hash.php
View File

@ -52,7 +52,7 @@ class Hash
*
* @access private
*/
//const PADDING_KECCAK = 1;
const PADDING_KECCAK = 1;
/**
* Padding Types
@ -338,6 +338,8 @@ class Hash
case 'sha3-224':
$this->length = 28;
break;
case 'keccak256':
$this->paddingType = self::PADDING_KECCAK;
case 'sha256':
case 'sha512/256':
case 'sha3-256':
@ -383,6 +385,7 @@ class Hash
break;
case 'sha3-256':
case 'shake256':
case 'keccak256':
$this->blockSize = 1088; // 1600 - 2*256
break;
case 'sha3-384':
@ -398,10 +401,10 @@ class Hash
$this->blockSize = 1024;
}
if (in_array(substr($hash, 0, 5), ['sha3-', 'shake'])) {
if (in_array(substr($hash, 0, 5), ['sha3-', 'shake', 'kecca'])) {
// PHP 7.1.0 introduced support for "SHA3 fixed mode algorithms":
// http://php.net/ChangeLog-7.php#7.1.0
if (version_compare(PHP_VERSION, '7.1.0') < 0 || substr($hash, 0,5) == 'shake') {
if (version_compare(PHP_VERSION, '7.1.0') < 0 || substr($hash, 0,5) != 'sha3-') {
//preg_match('#(\d+)$#', $hash, $matches);
//$this->parameters['capacity'] = 2 * $matches[1]; // 1600 - $this->blockSize
//$this->parameters['rate'] = 1600 - $this->parameters['capacity']; // == $this->blockSize
@ -930,10 +933,10 @@ class Hash
private static function sha3_pad($padLength, $padType)
{
switch ($padType) {
//case self::PADDING_KECCAK:
// $temp = chr(0x06) . str_repeat("\0", $padLength - 1);
// $temp[$padLength - 1] = $temp[$padLength - 1] | chr(0x80);
// return $temp
case self::PADDING_KECCAK:
$temp = chr(0x01) . str_repeat("\0", $padLength - 1);
$temp[$padLength - 1] = $temp[$padLength - 1] | chr(0x80);
return $temp;
case self::PADDING_SHAKE:
$temp = chr(0x1F) . str_repeat("\0", $padLength - 1);
$temp[$padLength - 1] = $temp[$padLength - 1] | chr(0x80);

20
tests/Unit/Crypt/HashTest.php
View File

@ -144,7 +144,23 @@ class Unit_Crypt_HashTest extends PhpseclibTestCase
'shake256-912', // this is what Ed448 uses
str_repeat('a', 135), // one character shy of the block size (136)
'55b991ece1e567b6e7c2c714444dd201cd51f4f3832d08e1d26bebc63e07a3d7ddeed4a5aa6df7a15f89f2050566f75d9cf1a4dea4ed1f578df0985d5706d49e877d9a913dcdbc26a4c4e807ec72dc10438df95873e24660e39cd49aa4e5df286cb5ba60eaad91ff134754c21cd736681a8f'
]
],
// from https://docs.ethers.io/v5/api/utils/hashing/
[
'keccak256', // used by Ethereum
"\x12\x34",
'56570de287d73cd1cb6092bb8fdee6173974955fdef345ae579ee9f475ea7432'
],
[
'keccak256',
'',
'c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470'
],
[
'keccak256',
'hello world',
'47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad'
],
];
}
@ -362,7 +378,7 @@ class Unit_Crypt_HashTest extends PhpseclibTestCase
*/
public function testHash96($hash, $message, $result)
{
if (preg_match('#^sha3-\d+#', $hash) || preg_match('#^shake(?:128|256)-\d+#', $hash)) {
if (preg_match('#^sha3-\d+#', $hash) || preg_match('#^shake(?:128|256)-\d+#', $hash) || $hash === 'keccak256') {
self::markTestSkipped($hash . '-96 not supported');
}
$this->assertHashesTo($hash . '-96', $message, substr($result, 0, 24));