HChaCha20.php in Automatic Updates 8

File

vendor/paragonie/sodium_compat/src/Core32/HChaCha20.php

<?php

if (class_exists('ParagonIE_Sodium_Core32_HChaCha20', false)) {
  return;
}

/**
 * Class ParagonIE_Sodium_Core_HChaCha20
 */
class ParagonIE_Sodium_Core32_HChaCha20 extends ParagonIE_Sodium_Core32_ChaCha20 {

  /**
   * @param string $in
   * @param string $key
   * @param string|null $c
   * @return string
   * @throws SodiumException
   * @throws TypeError
   */
  public static function hChaCha20($in = '', $key = '', $c = null) {
    $ctx = array();
    if ($c === null) {
      $ctx[0] = new ParagonIE_Sodium_Core32_Int32(array(
        0x6170,
        0x7865,
      ));
      $ctx[1] = new ParagonIE_Sodium_Core32_Int32(array(
        0x3320,
        0x646e,
      ));
      $ctx[2] = new ParagonIE_Sodium_Core32_Int32(array(
        0x7962,
        0x2d32,
      ));
      $ctx[3] = new ParagonIE_Sodium_Core32_Int32(array(
        0x6b20,
        0x6574,
      ));
    }
    else {
      $ctx[0] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 0, 4));
      $ctx[1] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 4, 4));
      $ctx[2] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 8, 4));
      $ctx[3] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 12, 4));
    }
    $ctx[4] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 0, 4));
    $ctx[5] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 4, 4));
    $ctx[6] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 8, 4));
    $ctx[7] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 12, 4));
    $ctx[8] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 16, 4));
    $ctx[9] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 20, 4));
    $ctx[10] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 24, 4));
    $ctx[11] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 28, 4));
    $ctx[12] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 0, 4));
    $ctx[13] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 4, 4));
    $ctx[14] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 8, 4));
    $ctx[15] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 12, 4));
    return self::hChaCha20Bytes($ctx);
  }

  /**
   * @param array $ctx
   * @return string
   * @throws SodiumException
   * @throws TypeError
   */
  protected static function hChaCha20Bytes(array $ctx) {

    /** @var ParagonIE_Sodium_Core32_Int32 $x0 */
    $x0 = $ctx[0];

    /** @var ParagonIE_Sodium_Core32_Int32 $x1 */
    $x1 = $ctx[1];

    /** @var ParagonIE_Sodium_Core32_Int32 $x2 */
    $x2 = $ctx[2];

    /** @var ParagonIE_Sodium_Core32_Int32 $x3 */
    $x3 = $ctx[3];

    /** @var ParagonIE_Sodium_Core32_Int32 $x4 */
    $x4 = $ctx[4];

    /** @var ParagonIE_Sodium_Core32_Int32 $x5 */
    $x5 = $ctx[5];

    /** @var ParagonIE_Sodium_Core32_Int32 $x6 */
    $x6 = $ctx[6];

    /** @var ParagonIE_Sodium_Core32_Int32 $x7 */
    $x7 = $ctx[7];

    /** @var ParagonIE_Sodium_Core32_Int32 $x8 */
    $x8 = $ctx[8];

    /** @var ParagonIE_Sodium_Core32_Int32 $x9 */
    $x9 = $ctx[9];

    /** @var ParagonIE_Sodium_Core32_Int32 $x10 */
    $x10 = $ctx[10];

    /** @var ParagonIE_Sodium_Core32_Int32 $x11 */
    $x11 = $ctx[11];

    /** @var ParagonIE_Sodium_Core32_Int32 $x12 */
    $x12 = $ctx[12];

    /** @var ParagonIE_Sodium_Core32_Int32 $x13 */
    $x13 = $ctx[13];

    /** @var ParagonIE_Sodium_Core32_Int32 $x14 */
    $x14 = $ctx[14];

    /** @var ParagonIE_Sodium_Core32_Int32 $x15 */
    $x15 = $ctx[15];
    for ($i = 0; $i < 10; ++$i) {

      # QUARTERROUND( x0,  x4,  x8,  x12)
      list($x0, $x4, $x8, $x12) = self::quarterRound($x0, $x4, $x8, $x12);

      # QUARTERROUND( x1,  x5,  x9,  x13)
      list($x1, $x5, $x9, $x13) = self::quarterRound($x1, $x5, $x9, $x13);

      # QUARTERROUND( x2,  x6,  x10,  x14)
      list($x2, $x6, $x10, $x14) = self::quarterRound($x2, $x6, $x10, $x14);

      # QUARTERROUND( x3,  x7,  x11,  x15)
      list($x3, $x7, $x11, $x15) = self::quarterRound($x3, $x7, $x11, $x15);

      # QUARTERROUND( x0,  x5,  x10,  x15)
      list($x0, $x5, $x10, $x15) = self::quarterRound($x0, $x5, $x10, $x15);

      # QUARTERROUND( x1,  x6,  x11,  x12)
      list($x1, $x6, $x11, $x12) = self::quarterRound($x1, $x6, $x11, $x12);

      # QUARTERROUND( x2,  x7,  x8,  x13)
      list($x2, $x7, $x8, $x13) = self::quarterRound($x2, $x7, $x8, $x13);

      # QUARTERROUND( x3,  x4,  x9,  x14)
      list($x3, $x4, $x9, $x14) = self::quarterRound($x3, $x4, $x9, $x14);
    }
    return $x0
      ->toReverseString() . $x1
      ->toReverseString() . $x2
      ->toReverseString() . $x3
      ->toReverseString() . $x12
      ->toReverseString() . $x13
      ->toReverseString() . $x14
      ->toReverseString() . $x15
      ->toReverseString();
  }

}

Classes

Name	Description
ParagonIE_Sodium_Core32_HChaCha20	Class ParagonIE_Sodium_Core_HChaCha20