HSalsa20.php in Automatic Updates 8

File

vendor/paragonie/sodium_compat/src/Core32/HSalsa20.php

<?php

if (class_exists('ParagonIE_Sodium_Core32_HSalsa20', false)) {
  return;
}

/**
 * Class ParagonIE_Sodium_Core32_HSalsa20
 */
abstract class ParagonIE_Sodium_Core32_HSalsa20 extends ParagonIE_Sodium_Core32_Salsa20 {

  /**
   * Calculate an hsalsa20 hash of a single block
   *
   * HSalsa20 doesn't have a counter and will never be used for more than
   * one block (used to derive a subkey for xsalsa20).
   *
   * @internal You should not use this directly from another application
   *
   * @param string $in
   * @param string $k
   * @param string|null $c
   * @return string
   * @throws SodiumException
   * @throws TypeError
   */
  public static function hsalsa20($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));
    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));
    }
    return $x0
      ->toReverseString() . $x5
      ->toReverseString() . $x10
      ->toReverseString() . $x15
      ->toReverseString() . $x6
      ->toReverseString() . $x7
      ->toReverseString() . $x8
      ->toReverseString() . $x9
      ->toReverseString();
  }

}

Classes

Name	Description
ParagonIE_Sodium_Core32_HSalsa20	Class ParagonIE_Sodium_Core32_HSalsa20