<?php
if (class_exists('ParagonIE_Sodium_Core_SipHash', false)) {
return;
}
/**
* Class ParagonIE_SodiumCompat_Core_SipHash
*
* Only uses 32-bit arithmetic, while the original SipHash used 64-bit integers
*/
class ParagonIE_Sodium_Core_SipHash extends ParagonIE_Sodium_Core_Util
{
/**
* @internal You should not use this directly from another application
*
* @param int[] $v
* @return int[]
*
*/
public static function sipRound(array $v)
{
# v0 += v1;
list($v[0], $v[1]) = self::add(
array($v[0], $v[1]),
array($v[2], $v[3])
);
# v1=ROTL(v1,13);
list($v[2], $v[3]) = self::rotl_64((int) $v[2], (int) $v[3], 13);
# v1 ^= v0;
$v[2] = (int) $v[2] ^ (int) $v[0];
$v[3] = (int) $v[3] ^ (int) $v[1];
# v0=ROTL(v0,32);
list($v[0], $v[1]) = self::rotl_64((int) $v[0], (int) $v[1], 32);
# v2 += v3;
list($v[4], $v[5]) = self::add(
array((int) $v[4], (int) $v[5]),
array((int) $v[6], (int) $v[7])
);
# v3=ROTL(v3,16);
list($v[6], $v[7]) = self::rotl_64((int) $v[6], (int) $v[7], 16);
# v3 ^= v2;
$v[6] = (int) $v[6] ^ (int) $v[4];
$v[7] = (int) $v[7] ^ (int) $v[5];
# v0 += v3;
list($v[0], $v[1]) = self::add(
array((int) $v[0], (int) $v[1]),
array((int) $v[6], (int) $v[7])
);
# v3=ROTL(v3,21);
list($v[6], $v[7]) = self::rotl_64((int) $v[6], (int) $v[7], 21);
# v3 ^= v0;
$v[6] = (int) $v[6] ^ (int) $v[0];
$v[7] = (int) $v[7] ^ (int) $v[1];
# v2 += v1;
list($v[4], $v[5]) = self::add(
array((int) $v[4], (int) $v[5]),
array((int) $v[2], (int) $v[3])
);
# v1=ROTL(v1,17);
list($v[2], $v[3]) = self::rotl_64((int) $v[2], (int) $v[3], 17);
# v1 ^= v2;;
$v[2] = (int) $v[2] ^ (int) $v[4];
$v[3] = (int) $v[3] ^ (int) $v[5];
# v2=ROTL(v2,32)
list($v[4], $v[5]) = self::rotl_64((int) $v[4], (int) $v[5], 32);
return $v;
}
/**
* Add two 32 bit integers representing a 64-bit integer.
*
* @internal You should not use this directly from another application
*
* @param int[] $a
* @param int[] $b
* @return array<int, mixed>
*/
public static function add(array $a, array $b)
{
/** @var int $x1 */
$x1 = $a[1] + $b[1];
/** @var int $c */
$c = $x1 >> 32; // Carry if ($a + $b) > 0xffffffff
/** @var int $x0 */
$x0 = $a[0] + $b[0] + $c;
return array(
$x0 & 0xffffffff,
$x1 & 0xffffffff
);
}
/**
* @internal You should not use this directly from another application
*
* @param int $int0
* @param int $int1
* @param int $c
* @return array<int, mixed>
*/
public static function rotl_64($int0, $int1, $c)
{
$int0 &= 0xffffffff;
$int1 &= 0xffffffff;
$c &= 63;
if ($c === 32) {
return array($int1, $int0);
}
if ($c > 31) {
$tmp = $int1;
$int1 = $int0;
$int0 = $tmp;
$c &= 31;
}
if ($c === 0) {
return array($int0, $int1);
}
return array(
0xffffffff & (
($int0 << $c)
|
($int1 >> (32 - $c))
),
0xffffffff & (
($int1 << $c)
|
($int0 >> (32 - $c))
),
);
}
/**
* Implements Siphash-2-4 using only 32-bit numbers.
*
* When we split an int into two, the higher bits go to the lower index.
* e.g. 0xDEADBEEFAB10C92D becomes [
* 0 => 0xDEADBEEF,
* 1 => 0xAB10C92D
* ].
*
* @internal You should not use this directly from another application
*
* @param string $in
* @param string $key
* @return string
* @throws SodiumException
* @throws TypeError
*/
public static function sipHash24($in, $key)
{
$inlen = self::strlen($in);
# /* "somepseudorandomlygeneratedbytes" */
# u64 v0 = 0x736f6d6570736575ULL;
# u64 v1 = 0x646f72616e646f6dULL;
# u64 v2 = 0x6c7967656e657261ULL;
# u64 v3 = 0x7465646279746573ULL;
$v = array(
0x736f6d65, // 0
0x70736575, // 1
0x646f7261, // 2
0x6e646f6d, // 3
0x6c796765, // 4
0x6e657261, // 5
0x74656462, // 6
0x79746573 // 7
);
// v0 => $v[0], $v[1]
// v1 => $v[2], $v[3]
// v2 => $v[4], $v[5]
// v3 => $v[6], $v[7]
# u64 k0 = LOAD64_LE( k );
# u64 k1 = LOAD64_LE( k + 8 );
$k = array(
self::load_4(self::substr($key, 4, 4)),
self::load_4(self::substr($key, 0, 4)),
self::load_4(self::substr($key, 12, 4)),
self::load_4(self::substr($key, 8, 4))
);
// k0 => $k[0], $k[1]
// k1 => $k[2], $k[3]
# b = ( ( u64 )inlen ) << 56;
$b = array(
$inlen << 24,
0
);
// See docblock for why the 0th index gets the higher bits.
# v3 ^= k1;
$v[6] ^= $k[2];
$v[7] ^= $k[3];
# v2 ^= k0;
$v[4] ^= $k[0];
$v[5] ^= $k[1];
# v1 ^= k1;
$v[2] ^= $k[2];
$v[3] ^= $k[3];
# v0 ^= k0;
$v[0] ^= $k[0];
$v[1] ^= $k[1];
$left = $inlen;
# for ( ; in != end; in += 8 )
while ($left >= 8) {
# m = LOAD64_LE( in );
$m = array(
self::load_4(self::substr($in, 4, 4)),
self::load_4(self::substr($in, 0, 4))
);
# v3 ^= m;
$v[6] ^= $m[0];
$v[7] ^= $m[1];
# SIPROUND;
# SIPROUND;
$v = self::sipRound($v);
$v = self::sipRound($v);
# v0 ^= m;
$v[0] ^= $m[0];
$v[1] ^= $m[1];
$in = self::substr($in, 8);
$left -= 8;
}
# switch( left )
# {
# case 7: b |= ( ( u64 )in[ 6] ) << 48;
# case 6: b |= ( ( u64 )in[ 5] ) << 40;
# case 5: b |= ( ( u64 )in[ 4] ) << 32;
# case 4: b |= ( ( u64 )in[ 3] ) << 24;
# case 3: b |= ( ( u64 )in[ 2] ) << 16;
# case 2: b |= ( ( u64 )in[ 1] ) << 8;
# case 1: b |= ( ( u64 )in[ 0] ); break;
# case 0: break;
# }
switch ($left) {
case 7:
$b[0] |= self::chrToInt($in[6]) << 16;
case 6:
$b[0] |= self::chrToInt($in[5]) << 8;
case 5:
$b[0] |= self::chrToInt($in[4]);
case 4:
$b[1] |= self::chrToInt($in[3]) << 24;
case 3:
$b[1] |= self::chrToInt($in[2]) << 16;
case 2:
$b[1] |= self::chrToInt($in[1]) << 8;
case 1:
$b[1] |= self::chrToInt($in[0]);
case 0:
break;
}
// See docblock for why the 0th index gets the higher bits.
# v3 ^= b;
$v[6] ^= $b[0];
$v[7] ^= $b[1];
# SIPROUND;
# SIPROUND;
$v = self::sipRound($v);
$v = self::sipRound($v);
# v0 ^= b;
$v[0] ^= $b[0];
$v[1] ^= $b[1];
// Flip the lower 8 bits of v2 which is ($v[4], $v[5]) in our implementation
# v2 ^= 0xff;
$v[5] ^= 0xff;
# SIPROUND;
# SIPROUND;
# SIPROUND;
# SIPROUND;
$v = self::sipRound($v);
$v = self::sipRound($v);
$v = self::sipRound($v);
$v = self::sipRound($v);
# b = v0 ^ v1 ^ v2 ^ v3;
# STORE64_LE( out, b );
return self::store32_le($v[1] ^ $v[3] ^ $v[5] ^ $v[7]) .
self::store32_le($v[0] ^ $v[2] ^ $v[4] ^ $v[6]);
}
}
At NFC Pay, your privacy is of utmost importance to us. This Privacy Policy outlines how we collect, use, share, and protect your personal information when you use our services, including our website and mobile applications.
1. Information We Collect
2. How We Use Your Information
We use the information we collect for the following purposes:
3. Sharing Your Information
We may share your personal information in the following circumstances:
4. Security of Your Information
We take the security of your personal information seriously and implement a variety of security measures, including encryption, secure servers, and access controls, to protect your data from unauthorized access, disclosure, alteration, or destruction. However, no method of transmission over the internet or electronic storage is completely secure, and we cannot guarantee its absolute security.
5. Your Privacy Rights
Depending on your location, you may have certain rights regarding your personal information, such as:
6. Third-Party Links
Our services may contain links to third-party websites or services. We are not responsible for the privacy practices or the content of these third-party sites. We encourage you to review the privacy policies of those third parties.
7. Children’s Privacy
Our services are not intended for individuals under the age of 13. We do not knowingly collect personal information from children under 13. If we become aware that we have collected personal information from a child under 13, we will take steps to delete that information.
8. Changes to This Privacy Policy
We may update this Privacy Policy from time to time to reflect changes in our practices or for other operational, legal, or regulatory reasons. We will notify you of any significant changes by posting the new Privacy Policy on our website and updating the effective date.
9. Contact Us
If you have any questions or concerns about this Privacy Policy or our data practices, please contact us at:
Email: support@nfcpay.com