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<?php

[0] Fix | Delete

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if (class_exists('ParagonIE_Sodium_Core32_SipHash', false)) {

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return;

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}

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/**

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* Class ParagonIE_SodiumCompat_Core32_SipHash

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* Only uses 32-bit arithmetic, while the original SipHash used 64-bit integers

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class ParagonIE_Sodium_Core32_SipHash extends ParagonIE_Sodium_Core32_Util

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{

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/**

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* @internal You should not use this directly from another application

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* @param array<int, ParagonIE_Sodium_Core32_Int64> $v

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* @return array<int, ParagonIE_Sodium_Core32_Int64>

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public static function sipRound(array $v)

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{

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# v0 += v1;

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$v[0] = $v[0]->addInt64($v[1]);

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# v1 = ROTL(v1, 13);

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$v[1] = $v[1]->rotateLeft(13);

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# v1 ^= v0;

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$v[1] = $v[1]->xorInt64($v[0]);

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# v0=ROTL(v0,32);

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$v[0] = $v[0]->rotateLeft(32);

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# v2 += v3;

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$v[2] = $v[2]->addInt64($v[3]);

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# v3=ROTL(v3,16);

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$v[3] = $v[3]->rotateLeft(16);

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# v3 ^= v2;

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$v[3] = $v[3]->xorInt64($v[2]);

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# v0 += v3;

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$v[0] = $v[0]->addInt64($v[3]);

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# v3=ROTL(v3,21);

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$v[3] = $v[3]->rotateLeft(21);

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# v3 ^= v0;

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$v[3] = $v[3]->xorInt64($v[0]);

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# v2 += v1;

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$v[2] = $v[2]->addInt64($v[1]);

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# v1=ROTL(v1,17);

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$v[1] = $v[1]->rotateLeft(17);

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# v1 ^= v2;

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$v[1] = $v[1]->xorInt64($v[2]);

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# v2=ROTL(v2,32)

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$v[2] = $v[2]->rotateLeft(32);

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return $v;

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}

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/**

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* @internal You should not use this directly from another application

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* @param string $in

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* @param string $key

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* @return string

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* @throws SodiumException

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* @throws TypeError

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public static function sipHash24($in, $key)

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{

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$inlen = self::strlen($in);

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# /* "somepseudorandomlygeneratedbytes" */

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# u64 v0 = 0x736f6d6570736575ULL;

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# u64 v1 = 0x646f72616e646f6dULL;

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# u64 v2 = 0x6c7967656e657261ULL;

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# u64 v3 = 0x7465646279746573ULL;

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$v = array(

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new ParagonIE_Sodium_Core32_Int64(

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array(0x736f, 0x6d65, 0x7073, 0x6575)

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new ParagonIE_Sodium_Core32_Int64(

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array(0x646f, 0x7261, 0x6e64, 0x6f6d)

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new ParagonIE_Sodium_Core32_Int64(

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array(0x6c79, 0x6765, 0x6e65, 0x7261)

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new ParagonIE_Sodium_Core32_Int64(

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array(0x7465, 0x6462, 0x7974, 0x6573)

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)

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);

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# u64 k0 = LOAD64_LE( k );

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# u64 k1 = LOAD64_LE( k + 8 );

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$k = array(

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ParagonIE_Sodium_Core32_Int64::fromReverseString(

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self::substr($key, 0, 8)

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ParagonIE_Sodium_Core32_Int64::fromReverseString(

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self::substr($key, 8, 8)

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)

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);

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# b = ( ( u64 )inlen ) << 56;

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$b = new ParagonIE_Sodium_Core32_Int64(

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array(($inlen << 8) & 0xffff, 0, 0, 0)

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);

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# v3 ^= k1;

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$v[3] = $v[3]->xorInt64($k[1]);

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# v2 ^= k0;

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$v[2] = $v[2]->xorInt64($k[0]);

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# v1 ^= k1;

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$v[1] = $v[1]->xorInt64($k[1]);

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# v0 ^= k0;

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$v[0] = $v[0]->xorInt64($k[0]);

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$left = $inlen;

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# for ( ; in != end; in += 8 )

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while ($left >= 8) {

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# m = LOAD64_LE( in );

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$m = ParagonIE_Sodium_Core32_Int64::fromReverseString(

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self::substr($in, 0, 8)

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);

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# v3 ^= m;

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$v[3] = $v[3]->xorInt64($m);

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# SIPROUND;

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# SIPROUND;

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$v = self::sipRound($v);

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$v = self::sipRound($v);

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# v0 ^= m;

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$v[0] = $v[0]->xorInt64($m);

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$in = self::substr($in, 8);

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$left -= 8;

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}

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# switch( left )

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# {

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# case 7: b |= ( ( u64 )in[ 6] ) << 48;

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# case 6: b |= ( ( u64 )in[ 5] ) << 40;

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# case 5: b |= ( ( u64 )in[ 4] ) << 32;

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# case 4: b |= ( ( u64 )in[ 3] ) << 24;

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# case 3: b |= ( ( u64 )in[ 2] ) << 16;

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# case 2: b |= ( ( u64 )in[ 1] ) << 8;

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# case 1: b |= ( ( u64 )in[ 0] ); break;

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# case 0: break;

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# }

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switch ($left) {

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case 7:

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$b = $b->orInt64(

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ParagonIE_Sodium_Core32_Int64::fromInts(

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0, self::chrToInt($in[6]) << 16

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)

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);

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case 6:

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$b = $b->orInt64(

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ParagonIE_Sodium_Core32_Int64::fromInts(

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0, self::chrToInt($in[5]) << 8

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)

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);

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case 5:

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$b = $b->orInt64(

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ParagonIE_Sodium_Core32_Int64::fromInts(

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0, self::chrToInt($in[4])

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)

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);

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case 4:

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$b = $b->orInt64(

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ParagonIE_Sodium_Core32_Int64::fromInts(

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self::chrToInt($in[3]) << 24, 0

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)

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);

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case 3:

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$b = $b->orInt64(

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ParagonIE_Sodium_Core32_Int64::fromInts(

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self::chrToInt($in[2]) << 16, 0

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)

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);

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case 2:

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$b = $b->orInt64(

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ParagonIE_Sodium_Core32_Int64::fromInts(

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self::chrToInt($in[1]) << 8, 0

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)

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);

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case 1:

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$b = $b->orInt64(

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ParagonIE_Sodium_Core32_Int64::fromInts(

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self::chrToInt($in[0]), 0

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)

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);

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case 0:

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break;

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}

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# v3 ^= b;

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$v[3] = $v[3]->xorInt64($b);

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# SIPROUND;

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# SIPROUND;

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$v = self::sipRound($v);

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$v = self::sipRound($v);

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# v0 ^= b;

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$v[0] = $v[0]->xorInt64($b);

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// Flip the lower 8 bits of v2 which is ($v[4], $v[5]) in our implementation

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# v2 ^= 0xff;

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$v[2]->limbs[3] ^= 0xff;

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# SIPROUND;

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# SIPROUND;

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# SIPROUND;

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# SIPROUND;

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$v = self::sipRound($v);

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$v = self::sipRound($v);

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$v = self::sipRound($v);

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$v = self::sipRound($v);

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# b = v0 ^ v1 ^ v2 ^ v3;

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# STORE64_LE( out, b );

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return $v[0]

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->xorInt64($v[1])

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->xorInt64($v[2])

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->xorInt64($v[3])

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->toReverseString();

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}

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}

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