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cb01bbf97b
This adds a pure PHP implementation of the cryptographic functions supported in PHP 7.2+. It provides the necessary backwards compatibility required to support signature verification and other security features going forward across all supported PHP versions. Props paragoninitiativeenterprises Fixes #45806. See #39309. Built from https://develop.svn.wordpress.org/trunk@44953 git-svn-id: http://core.svn.wordpress.org/trunk@44784 1a063a9b-81f0-0310-95a4-ce76da25c4cd
142 lines
6.8 KiB
PHP
142 lines
6.8 KiB
PHP
<?php
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if (class_exists('ParagonIE_Sodium_Core32_HSalsa20', false)) {
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return;
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}
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/**
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* Class ParagonIE_Sodium_Core32_HSalsa20
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*/
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abstract class ParagonIE_Sodium_Core32_HSalsa20 extends ParagonIE_Sodium_Core32_Salsa20
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{
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/**
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* Calculate an hsalsa20 hash of a single block
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*
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* HSalsa20 doesn't have a counter and will never be used for more than
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* one block (used to derive a subkey for xsalsa20).
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*
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* @internal You should not use this directly from another application
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*
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* @param string $in
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* @param string $k
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* @param string|null $c
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* @return string
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* @throws SodiumException
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* @throws TypeError
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*/
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public static function hsalsa20($in, $k, $c = null)
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{
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/**
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* @var ParagonIE_Sodium_Core32_Int32 $x0
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* @var ParagonIE_Sodium_Core32_Int32 $x1
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* @var ParagonIE_Sodium_Core32_Int32 $x2
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* @var ParagonIE_Sodium_Core32_Int32 $x3
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* @var ParagonIE_Sodium_Core32_Int32 $x4
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* @var ParagonIE_Sodium_Core32_Int32 $x5
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* @var ParagonIE_Sodium_Core32_Int32 $x6
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* @var ParagonIE_Sodium_Core32_Int32 $x7
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* @var ParagonIE_Sodium_Core32_Int32 $x8
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* @var ParagonIE_Sodium_Core32_Int32 $x9
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* @var ParagonIE_Sodium_Core32_Int32 $x10
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* @var ParagonIE_Sodium_Core32_Int32 $x11
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* @var ParagonIE_Sodium_Core32_Int32 $x12
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* @var ParagonIE_Sodium_Core32_Int32 $x13
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* @var ParagonIE_Sodium_Core32_Int32 $x14
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* @var ParagonIE_Sodium_Core32_Int32 $x15
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* @var ParagonIE_Sodium_Core32_Int32 $j0
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* @var ParagonIE_Sodium_Core32_Int32 $j1
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* @var ParagonIE_Sodium_Core32_Int32 $j2
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* @var ParagonIE_Sodium_Core32_Int32 $j3
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* @var ParagonIE_Sodium_Core32_Int32 $j4
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* @var ParagonIE_Sodium_Core32_Int32 $j5
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* @var ParagonIE_Sodium_Core32_Int32 $j6
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* @var ParagonIE_Sodium_Core32_Int32 $j7
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* @var ParagonIE_Sodium_Core32_Int32 $j8
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* @var ParagonIE_Sodium_Core32_Int32 $j9
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* @var ParagonIE_Sodium_Core32_Int32 $j10
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* @var ParagonIE_Sodium_Core32_Int32 $j11
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* @var ParagonIE_Sodium_Core32_Int32 $j12
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* @var ParagonIE_Sodium_Core32_Int32 $j13
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* @var ParagonIE_Sodium_Core32_Int32 $j14
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* @var ParagonIE_Sodium_Core32_Int32 $j15
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*/
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if (self::strlen($k) < 32) {
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throw new RangeException('Key must be 32 bytes long');
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}
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if ($c === null) {
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$x0 = new ParagonIE_Sodium_Core32_Int32(array(0x6170, 0x7865));
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$x5 = new ParagonIE_Sodium_Core32_Int32(array(0x3320, 0x646e));
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$x10 = new ParagonIE_Sodium_Core32_Int32(array(0x7962, 0x2d32));
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$x15 = new ParagonIE_Sodium_Core32_Int32(array(0x6b20, 0x6574));
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} else {
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$x0 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 0, 4));
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$x5 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 4, 4));
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$x10 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 8, 4));
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$x15 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 12, 4));
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}
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$x1 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 0, 4));
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$x2 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 4, 4));
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$x3 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 8, 4));
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$x4 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 12, 4));
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$x6 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 0, 4));
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$x7 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 4, 4));
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$x8 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 8, 4));
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$x9 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 12, 4));
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$x11 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 16, 4));
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$x12 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 20, 4));
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$x13 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 24, 4));
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$x14 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 28, 4));
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for ($i = self::ROUNDS; $i > 0; $i -= 2) {
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$x4 = $x4->xorInt32($x0->addInt32($x12)->rotateLeft(7));
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$x8 = $x8->xorInt32($x4->addInt32($x0)->rotateLeft(9));
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$x12 = $x12->xorInt32($x8->addInt32($x4)->rotateLeft(13));
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$x0 = $x0->xorInt32($x12->addInt32($x8)->rotateLeft(18));
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$x9 = $x9->xorInt32($x5->addInt32($x1)->rotateLeft(7));
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$x13 = $x13->xorInt32($x9->addInt32($x5)->rotateLeft(9));
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$x1 = $x1->xorInt32($x13->addInt32($x9)->rotateLeft(13));
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$x5 = $x5->xorInt32($x1->addInt32($x13)->rotateLeft(18));
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$x14 = $x14->xorInt32($x10->addInt32($x6)->rotateLeft(7));
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$x2 = $x2->xorInt32($x14->addInt32($x10)->rotateLeft(9));
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$x6 = $x6->xorInt32($x2->addInt32($x14)->rotateLeft(13));
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$x10 = $x10->xorInt32($x6->addInt32($x2)->rotateLeft(18));
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$x3 = $x3->xorInt32($x15->addInt32($x11)->rotateLeft(7));
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$x7 = $x7->xorInt32($x3->addInt32($x15)->rotateLeft(9));
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$x11 = $x11->xorInt32($x7->addInt32($x3)->rotateLeft(13));
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$x15 = $x15->xorInt32($x11->addInt32($x7)->rotateLeft(18));
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$x1 = $x1->xorInt32($x0->addInt32($x3)->rotateLeft(7));
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$x2 = $x2->xorInt32($x1->addInt32($x0)->rotateLeft(9));
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$x3 = $x3->xorInt32($x2->addInt32($x1)->rotateLeft(13));
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$x0 = $x0->xorInt32($x3->addInt32($x2)->rotateLeft(18));
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$x6 = $x6->xorInt32($x5->addInt32($x4)->rotateLeft(7));
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$x7 = $x7->xorInt32($x6->addInt32($x5)->rotateLeft(9));
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$x4 = $x4->xorInt32($x7->addInt32($x6)->rotateLeft(13));
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$x5 = $x5->xorInt32($x4->addInt32($x7)->rotateLeft(18));
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$x11 = $x11->xorInt32($x10->addInt32($x9)->rotateLeft(7));
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$x8 = $x8->xorInt32($x11->addInt32($x10)->rotateLeft(9));
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$x9 = $x9->xorInt32($x8->addInt32($x11)->rotateLeft(13));
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$x10 = $x10->xorInt32($x9->addInt32($x8)->rotateLeft(18));
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$x12 = $x12->xorInt32($x15->addInt32($x14)->rotateLeft(7));
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$x13 = $x13->xorInt32($x12->addInt32($x15)->rotateLeft(9));
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$x14 = $x14->xorInt32($x13->addInt32($x12)->rotateLeft(13));
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$x15 = $x15->xorInt32($x14->addInt32($x13)->rotateLeft(18));
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}
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return $x0->toReverseString() .
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$x5->toReverseString() .
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$x10->toReverseString() .
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$x15->toReverseString() .
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$x6->toReverseString() .
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$x7->toReverseString() .
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$x8->toReverseString() .
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$x9->toReverseString();
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}
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}
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