/home/kueuepay/public_html/vendor/paragonie/sodium_compat/src/Core32/Salsa20.php
<?php
if (class_exists('ParagonIE_Sodium_Core32_Salsa20', false)) {
return;
}
/**
* Class ParagonIE_Sodium_Core32_Salsa20
*/
abstract class ParagonIE_Sodium_Core32_Salsa20 extends ParagonIE_Sodium_Core32_Util
{
const ROUNDS = 20;
/**
* Calculate an salsa20 hash of a single block
*
* @internal You should not use this directly from another application
*
* @param string $in
* @param string $k
* @param string|null $c
* @return string
* @throws SodiumException
* @throws TypeError
*/
public static function core_salsa20($in, $k, $c = null)
{
/**
* @var ParagonIE_Sodium_Core32_Int32 $x0
* @var ParagonIE_Sodium_Core32_Int32 $x1
* @var ParagonIE_Sodium_Core32_Int32 $x2
* @var ParagonIE_Sodium_Core32_Int32 $x3
* @var ParagonIE_Sodium_Core32_Int32 $x4
* @var ParagonIE_Sodium_Core32_Int32 $x5
* @var ParagonIE_Sodium_Core32_Int32 $x6
* @var ParagonIE_Sodium_Core32_Int32 $x7
* @var ParagonIE_Sodium_Core32_Int32 $x8
* @var ParagonIE_Sodium_Core32_Int32 $x9
* @var ParagonIE_Sodium_Core32_Int32 $x10
* @var ParagonIE_Sodium_Core32_Int32 $x11
* @var ParagonIE_Sodium_Core32_Int32 $x12
* @var ParagonIE_Sodium_Core32_Int32 $x13
* @var ParagonIE_Sodium_Core32_Int32 $x14
* @var ParagonIE_Sodium_Core32_Int32 $x15
* @var ParagonIE_Sodium_Core32_Int32 $j0
* @var ParagonIE_Sodium_Core32_Int32 $j1
* @var ParagonIE_Sodium_Core32_Int32 $j2
* @var ParagonIE_Sodium_Core32_Int32 $j3
* @var ParagonIE_Sodium_Core32_Int32 $j4
* @var ParagonIE_Sodium_Core32_Int32 $j5
* @var ParagonIE_Sodium_Core32_Int32 $j6
* @var ParagonIE_Sodium_Core32_Int32 $j7
* @var ParagonIE_Sodium_Core32_Int32 $j8
* @var ParagonIE_Sodium_Core32_Int32 $j9
* @var ParagonIE_Sodium_Core32_Int32 $j10
* @var ParagonIE_Sodium_Core32_Int32 $j11
* @var ParagonIE_Sodium_Core32_Int32 $j12
* @var ParagonIE_Sodium_Core32_Int32 $j13
* @var ParagonIE_Sodium_Core32_Int32 $j14
* @var ParagonIE_Sodium_Core32_Int32 $j15
*/
if (self::strlen($k) < 32) {
throw new RangeException('Key must be 32 bytes long');
}
if ($c === null) {
$x0 = new ParagonIE_Sodium_Core32_Int32(array(0x6170, 0x7865));
$x5 = new ParagonIE_Sodium_Core32_Int32(array(0x3320, 0x646e));
$x10 = new ParagonIE_Sodium_Core32_Int32(array(0x7962, 0x2d32));
$x15 = new ParagonIE_Sodium_Core32_Int32(array(0x6b20, 0x6574));
} else {
$x0 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 0, 4));
$x5 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 4, 4));
$x10 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 8, 4));
$x15 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 12, 4));
}
$x1 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 0, 4));
$x2 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 4, 4));
$x3 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 8, 4));
$x4 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 12, 4));
$x6 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 0, 4));
$x7 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 4, 4));
$x8 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 8, 4));
$x9 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 12, 4));
$x11 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 16, 4));
$x12 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 20, 4));
$x13 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 24, 4));
$x14 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 28, 4));
$j0 = clone $x0;
$j1 = clone $x1;
$j2 = clone $x2;
$j3 = clone $x3;
$j4 = clone $x4;
$j5 = clone $x5;
$j6 = clone $x6;
$j7 = clone $x7;
$j8 = clone $x8;
$j9 = clone $x9;
$j10 = clone $x10;
$j11 = clone $x11;
$j12 = clone $x12;
$j13 = clone $x13;
$j14 = clone $x14;
$j15 = clone $x15;
for ($i = self::ROUNDS; $i > 0; $i -= 2) {
$x4 = $x4->xorInt32($x0->addInt32($x12)->rotateLeft(7));
$x8 = $x8->xorInt32($x4->addInt32($x0)->rotateLeft(9));
$x12 = $x12->xorInt32($x8->addInt32($x4)->rotateLeft(13));
$x0 = $x0->xorInt32($x12->addInt32($x8)->rotateLeft(18));
$x9 = $x9->xorInt32($x5->addInt32($x1)->rotateLeft(7));
$x13 = $x13->xorInt32($x9->addInt32($x5)->rotateLeft(9));
$x1 = $x1->xorInt32($x13->addInt32($x9)->rotateLeft(13));
$x5 = $x5->xorInt32($x1->addInt32($x13)->rotateLeft(18));
$x14 = $x14->xorInt32($x10->addInt32($x6)->rotateLeft(7));
$x2 = $x2->xorInt32($x14->addInt32($x10)->rotateLeft(9));
$x6 = $x6->xorInt32($x2->addInt32($x14)->rotateLeft(13));
$x10 = $x10->xorInt32($x6->addInt32($x2)->rotateLeft(18));
$x3 = $x3->xorInt32($x15->addInt32($x11)->rotateLeft(7));
$x7 = $x7->xorInt32($x3->addInt32($x15)->rotateLeft(9));
$x11 = $x11->xorInt32($x7->addInt32($x3)->rotateLeft(13));
$x15 = $x15->xorInt32($x11->addInt32($x7)->rotateLeft(18));
$x1 = $x1->xorInt32($x0->addInt32($x3)->rotateLeft(7));
$x2 = $x2->xorInt32($x1->addInt32($x0)->rotateLeft(9));
$x3 = $x3->xorInt32($x2->addInt32($x1)->rotateLeft(13));
$x0 = $x0->xorInt32($x3->addInt32($x2)->rotateLeft(18));
$x6 = $x6->xorInt32($x5->addInt32($x4)->rotateLeft(7));
$x7 = $x7->xorInt32($x6->addInt32($x5)->rotateLeft(9));
$x4 = $x4->xorInt32($x7->addInt32($x6)->rotateLeft(13));
$x5 = $x5->xorInt32($x4->addInt32($x7)->rotateLeft(18));
$x11 = $x11->xorInt32($x10->addInt32($x9)->rotateLeft(7));
$x8 = $x8->xorInt32($x11->addInt32($x10)->rotateLeft(9));
$x9 = $x9->xorInt32($x8->addInt32($x11)->rotateLeft(13));
$x10 = $x10->xorInt32($x9->addInt32($x8)->rotateLeft(18));
$x12 = $x12->xorInt32($x15->addInt32($x14)->rotateLeft(7));
$x13 = $x13->xorInt32($x12->addInt32($x15)->rotateLeft(9));
$x14 = $x14->xorInt32($x13->addInt32($x12)->rotateLeft(13));
$x15 = $x15->xorInt32($x14->addInt32($x13)->rotateLeft(18));
}
$x0 = $x0->addInt32($j0);
$x1 = $x1->addInt32($j1);
$x2 = $x2->addInt32($j2);
$x3 = $x3->addInt32($j3);
$x4 = $x4->addInt32($j4);
$x5 = $x5->addInt32($j5);
$x6 = $x6->addInt32($j6);
$x7 = $x7->addInt32($j7);
$x8 = $x8->addInt32($j8);
$x9 = $x9->addInt32($j9);
$x10 = $x10->addInt32($j10);
$x11 = $x11->addInt32($j11);
$x12 = $x12->addInt32($j12);
$x13 = $x13->addInt32($j13);
$x14 = $x14->addInt32($j14);
$x15 = $x15->addInt32($j15);
return $x0->toReverseString() .
$x1->toReverseString() .
$x2->toReverseString() .
$x3->toReverseString() .
$x4->toReverseString() .
$x5->toReverseString() .
$x6->toReverseString() .
$x7->toReverseString() .
$x8->toReverseString() .
$x9->toReverseString() .
$x10->toReverseString() .
$x11->toReverseString() .
$x12->toReverseString() .
$x13->toReverseString() .
$x14->toReverseString() .
$x15->toReverseString();
}
/**
* @internal You should not use this directly from another application
*
* @param int $len
* @param string $nonce
* @param string $key
* @return string
* @throws SodiumException
* @throws TypeError
*/
public static function salsa20($len, $nonce, $key)
{
if (self::strlen($key) !== 32) {
throw new RangeException('Key must be 32 bytes long');
}
$kcopy = '' . $key;
$in = self::substr($nonce, 0, 8) . str_repeat("\0", 8);
$c = '';
while ($len >= 64) {
$c .= self::core_salsa20($in, $kcopy, null);
$u = 1;
// Internal counter.
for ($i = 8; $i < 16; ++$i) {
$u += self::chrToInt($in[$i]);
$in[$i] = self::intToChr($u & 0xff);
$u >>= 8;
}
$len -= 64;
}
if ($len > 0) {
$c .= self::substr(
self::core_salsa20($in, $kcopy, null),
0,
$len
);
}
try {
ParagonIE_Sodium_Compat::memzero($kcopy);
} catch (SodiumException $ex) {
$kcopy = null;
}
return $c;
}
/**
* @internal You should not use this directly from another application
*
* @param string $m
* @param string $n
* @param int $ic
* @param string $k
* @return string
* @throws SodiumException
* @throws TypeError
*/
public static function salsa20_xor_ic($m, $n, $ic, $k)
{
$mlen = self::strlen($m);
if ($mlen < 1) {
return '';
}
$kcopy = self::substr($k, 0, 32);
$in = self::substr($n, 0, 8);
// Initialize the counter
$in .= ParagonIE_Sodium_Core32_Util::store64_le($ic);
$c = '';
while ($mlen >= 64) {
$block = self::core_salsa20($in, $kcopy, null);
$c .= self::xorStrings(
self::substr($m, 0, 64),
self::substr($block, 0, 64)
);
$u = 1;
for ($i = 8; $i < 16; ++$i) {
$u += self::chrToInt($in[$i]);
$in[$i] = self::intToChr($u & 0xff);
$u >>= 8;
}
$mlen -= 64;
$m = self::substr($m, 64);
}
if ($mlen) {
$block = self::core_salsa20($in, $kcopy, null);
$c .= self::xorStrings(
self::substr($m, 0, $mlen),
self::substr($block, 0, $mlen)
);
}
try {
ParagonIE_Sodium_Compat::memzero($block);
ParagonIE_Sodium_Compat::memzero($kcopy);
} catch (SodiumException $ex) {
$block = null;
$kcopy = null;
}
return $c;
}
/**
* @internal You should not use this directly from another application
*
* @param string $message
* @param string $nonce
* @param string $key
* @return string
* @throws SodiumException
* @throws TypeError
*/
public static function salsa20_xor($message, $nonce, $key)
{
return self::xorStrings(
$message,
self::salsa20(
self::strlen($message),
$nonce,
$key
)
);
}
}
Web Journal
top
Discover the Latest in Digital Payments and NFC Technology
Dive into our blog to explore the cutting-edge trends in digital payments and NFC technology. Stay updated on the innovations that are revolutionizing transactions, boosting security, and making payments quicker and more convenient. Learn how these advancements are shaping the future of financial interactions and driving the global transition towards a cashless world.
The Rise of Contactless Payments:...
In recent years, contactless payments have surged in popularity, driven...
Enhancing Payment Security: The Role...
As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational...
The Future of Digital Wallets:...
Digital wallets have fundamentally transformed how we manage money, offering a streamlined, secure, and highly...
In the digital age, privacy concerns have become increasingly paramount, prompting the European Union to enact the General Data Protection Regulation (GDPR) in 2018. Among its many provisions, GDPR sets strict guidelines for the collection and processing of personal data, including the use of cookies on websites. Privacy Policy
Allow
Decline
