Edit File by line

$st = hash_init('sha512');

[500] Fix | Delete

self::hash_update($st, $ux);

[501] Fix | Delete

self::hash_update($st, self::intToChr($t[2]));

[502] Fix | Delete

self::hash_update($st, $ctx);

[503] Fix | Delete

self::hash_update($st, self::intToChr($ctx_len));

[504] Fix | Delete

$ux = hash_final($st, true);

[505] Fix | Delete

$amount = min($hLen - $i, 128);

[506] Fix | Delete

for ($j = 0; $j < $amount; ++$j) {

[507] Fix | Delete

$h[$i + $j] = self::chrToInt($ux[$i]);

[508] Fix | Delete

}

[509] Fix | Delete

}

[510] Fix | Delete

return self::intArrayToString(array_slice($h, 0, $hLen));

[511] Fix | Delete

}

[512] Fix | Delete

[513] Fix | Delete

/**

[514] Fix | Delete

* @param int $hLen

[515] Fix | Delete

* @param ?string $ctx

[516] Fix | Delete

* @param string $msg

[517] Fix | Delete

* @param int $hash_alg

[518] Fix | Delete

* @return string

[519] Fix | Delete

* @throws SodiumException

[520] Fix | Delete

[521] Fix | Delete

public static function h2c_string_to_hash($hLen, $ctx, $msg, $hash_alg)

[522] Fix | Delete

{

[523] Fix | Delete

switch ($hash_alg) {

[524] Fix | Delete

case self::CORE_H2C_SHA256:

[525] Fix | Delete

return self::h2c_string_to_hash_sha256($hLen, $ctx, $msg);

[526] Fix | Delete

case self::CORE_H2C_SHA512:

[527] Fix | Delete

return self::h2c_string_to_hash_sha512($hLen, $ctx, $msg);

[528] Fix | Delete

default:

[529] Fix | Delete

throw new SodiumException('Invalid H2C hash algorithm');

[530] Fix | Delete

}

[531] Fix | Delete

}

[532] Fix | Delete

[533] Fix | Delete

/**

[534] Fix | Delete

* @param ?string $ctx

[535] Fix | Delete

* @param string $msg

[536] Fix | Delete

* @param int $hash_alg

[537] Fix | Delete

* @return string

[538] Fix | Delete

* @throws SodiumException

[539] Fix | Delete

[540] Fix | Delete

protected static function _string_to_element($ctx, $msg, $hash_alg)

[541] Fix | Delete

{

[542] Fix | Delete

return self::ristretto255_from_hash(

[543] Fix | Delete

self::h2c_string_to_hash(self::crypto_core_ristretto255_HASHBYTES, $ctx, $msg, $hash_alg)

[544] Fix | Delete

);

[545] Fix | Delete

}

[546] Fix | Delete

[547] Fix | Delete

/**

[548] Fix | Delete

* @return string

[549] Fix | Delete

* @throws SodiumException

[550] Fix | Delete

* @throws Exception

[551] Fix | Delete

[552] Fix | Delete

public static function ristretto255_random()

[553] Fix | Delete

{

[554] Fix | Delete

return self::ristretto255_from_hash(

[555] Fix | Delete

ParagonIE_Sodium_Compat::randombytes_buf(self::crypto_core_ristretto255_HASHBYTES)

[556] Fix | Delete

);

[557] Fix | Delete

}

[558] Fix | Delete

[559] Fix | Delete

/**

[560] Fix | Delete

* @return string

[561] Fix | Delete

* @throws SodiumException

[562] Fix | Delete

[563] Fix | Delete

public static function ristretto255_scalar_random()

[564] Fix | Delete

{

[565] Fix | Delete

return self::scalar_random();

[566] Fix | Delete

}

[567] Fix | Delete

[568] Fix | Delete

/**

[569] Fix | Delete

* @param string $s

[570] Fix | Delete

* @return string

[571] Fix | Delete

* @throws SodiumException

[572] Fix | Delete

[573] Fix | Delete

public static function ristretto255_scalar_complement($s)

[574] Fix | Delete

{

[575] Fix | Delete

return self::scalar_complement($s);

[576] Fix | Delete

}

[577] Fix | Delete

[578] Fix | Delete

[579] Fix | Delete

/**

[580] Fix | Delete

* @param string $s

[581] Fix | Delete

* @return string

[582] Fix | Delete

[583] Fix | Delete

public static function ristretto255_scalar_invert($s)

[584] Fix | Delete

{

[585] Fix | Delete

return self::sc25519_invert($s);

[586] Fix | Delete

}

[587] Fix | Delete

[588] Fix | Delete

/**

[589] Fix | Delete

* @param string $s

[590] Fix | Delete

* @return string

[591] Fix | Delete

* @throws SodiumException

[592] Fix | Delete

[593] Fix | Delete

public static function ristretto255_scalar_negate($s)

[594] Fix | Delete

{

[595] Fix | Delete

return self::scalar_negate($s);

[596] Fix | Delete

}

[597] Fix | Delete

[598] Fix | Delete

/**

[599] Fix | Delete

* @param string $x

[600] Fix | Delete

* @param string $y

[601] Fix | Delete

* @return string

[602] Fix | Delete

[603] Fix | Delete

public static function ristretto255_scalar_add($x, $y)

[604] Fix | Delete

{

[605] Fix | Delete

return self::scalar_add($x, $y);

[606] Fix | Delete

}

[607] Fix | Delete

[608] Fix | Delete

/**

[609] Fix | Delete

* @param string $x

[610] Fix | Delete

* @param string $y

[611] Fix | Delete

* @return string

[612] Fix | Delete

[613] Fix | Delete

public static function ristretto255_scalar_sub($x, $y)

[614] Fix | Delete

{

[615] Fix | Delete

return self::scalar_sub($x, $y);

[616] Fix | Delete

}

[617] Fix | Delete

[618] Fix | Delete

/**

[619] Fix | Delete

* @param string $x

[620] Fix | Delete

* @param string $y

[621] Fix | Delete

* @return string

[622] Fix | Delete

[623] Fix | Delete

public static function ristretto255_scalar_mul($x, $y)

[624] Fix | Delete

{

[625] Fix | Delete

return self::sc25519_mul($x, $y);

[626] Fix | Delete

}

[627] Fix | Delete

[628] Fix | Delete

/**

[629] Fix | Delete

* @param string $ctx

[630] Fix | Delete

* @param string $msg

[631] Fix | Delete

* @param int $hash_alg

[632] Fix | Delete

* @return string

[633] Fix | Delete

* @throws SodiumException

[634] Fix | Delete

[635] Fix | Delete

public static function ristretto255_scalar_from_string($ctx, $msg, $hash_alg)

[636] Fix | Delete

{

[637] Fix | Delete

$h = array_fill(0, 64, 0);

[638] Fix | Delete

$h_be = self::stringToIntArray(

[639] Fix | Delete

self::h2c_string_to_hash(

[640] Fix | Delete

self::HASH_SC_L, $ctx, $msg, $hash_alg

[641] Fix | Delete

)

[642] Fix | Delete

);

[643] Fix | Delete

[644] Fix | Delete

for ($i = 0; $i < self::HASH_SC_L; ++$i) {

[645] Fix | Delete

$h[$i] = $h_be[self::HASH_SC_L - 1 - $i];

[646] Fix | Delete

}

[647] Fix | Delete

return self::ristretto255_scalar_reduce(self::intArrayToString($h));

[648] Fix | Delete

}

[649] Fix | Delete

[650] Fix | Delete

/**

[651] Fix | Delete

* @param string $s

[652] Fix | Delete

* @return string

[653] Fix | Delete

[654] Fix | Delete

public static function ristretto255_scalar_reduce($s)

[655] Fix | Delete

{

[656] Fix | Delete

return self::sc_reduce($s);

[657] Fix | Delete

}

[658] Fix | Delete

[659] Fix | Delete

/**

[660] Fix | Delete

* @param string $n

[661] Fix | Delete

* @param string $p

[662] Fix | Delete

* @return string

[663] Fix | Delete

* @throws SodiumException

[664] Fix | Delete

[665] Fix | Delete

public static function scalarmult_ristretto255($n, $p)

[666] Fix | Delete

{

[667] Fix | Delete

if (self::strlen($n) !== 32) {

[668] Fix | Delete

throw new SodiumException('Scalar must be 32 bytes, ' . self::strlen($p) . ' given.');

[669] Fix | Delete

}

[670] Fix | Delete

if (self::strlen($p) !== 32) {

[671] Fix | Delete

throw new SodiumException('Point must be 32 bytes, ' . self::strlen($p) . ' given.');

[672] Fix | Delete

}

[673] Fix | Delete

$result = self::ristretto255_frombytes($p);

[674] Fix | Delete

if ($result['res'] !== 0) {

[675] Fix | Delete

throw new SodiumException('Could not multiply points');

[676] Fix | Delete

}

[677] Fix | Delete

$P = $result['h'];

[678] Fix | Delete

[679] Fix | Delete

$t = self::stringToIntArray($n);

[680] Fix | Delete

$t[31] &= 0x7f;

[681] Fix | Delete

$Q = self::ge_scalarmult(self::intArrayToString($t), $P);

[682] Fix | Delete

$q = self::ristretto255_p3_tobytes($Q);

[683] Fix | Delete

if (ParagonIE_Sodium_Compat::is_zero($q)) {

[684] Fix | Delete

throw new SodiumException('An unknown error has occurred');

[685] Fix | Delete

}

[686] Fix | Delete

return $q;

[687] Fix | Delete

}

[688] Fix | Delete

[689] Fix | Delete

/**

[690] Fix | Delete

* @param string $n

[691] Fix | Delete

* @return string

[692] Fix | Delete

* @throws SodiumException

[693] Fix | Delete

[694] Fix | Delete

public static function scalarmult_ristretto255_base($n)

[695] Fix | Delete

{

[696] Fix | Delete

$t = self::stringToIntArray($n);

[697] Fix | Delete

$t[31] &= 0x7f;

[698] Fix | Delete

$Q = self::ge_scalarmult_base(self::intArrayToString($t));

[699] Fix | Delete

$q = self::ristretto255_p3_tobytes($Q);

[700] Fix | Delete

if (ParagonIE_Sodium_Compat::is_zero($q)) {

[701] Fix | Delete

throw new SodiumException('An unknown error has occurred');

[702] Fix | Delete

}

[703] Fix | Delete

return $q;

[704] Fix | Delete

}

[705] Fix | Delete

}

[706] Fix | Delete

[707] Fix | Delete