IetfCtx.php in Automatic Updates 7

File

vendor/paragonie/sodium_compat/src/Core32/ChaCha20/IetfCtx.php

<?php

if (class_exists('ParagonIE_Sodium_Core_ChaCha20_IetfCtx', false)) {
  return;
}

/**
 * Class ParagonIE_Sodium_Core32_ChaCha20_IetfCtx
 */
class ParagonIE_Sodium_Core32_ChaCha20_IetfCtx extends ParagonIE_Sodium_Core32_ChaCha20_Ctx {

  /**
   * ParagonIE_Sodium_Core_ChaCha20_IetfCtx constructor.
   *
   * @internal You should not use this directly from another application
   *
   * @param string $key     ChaCha20 key.
   * @param string $iv      Initialization Vector (a.k.a. nonce).
   * @param string $counter The initial counter value.
   *                        Defaults to 4 0x00 bytes.
   * @throws InvalidArgumentException
   * @throws SodiumException
   * @throws TypeError
   */
  public function __construct($key = '', $iv = '', $counter = '') {
    if (self::strlen($iv) !== 12) {
      throw new InvalidArgumentException('ChaCha20 expects a 96-bit nonce in IETF mode.');
    }
    parent::__construct($key, self::substr($iv, 0, 8), $counter);
    if (!empty($counter)) {
      $this->container[12] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($counter, 0, 4));
    }
    $this->container[13] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($iv, 0, 4));
    $this->container[14] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($iv, 4, 4));
    $this->container[15] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($iv, 8, 4));
  }

}

Classes

Name	Description
ParagonIE_Sodium_Core32_ChaCha20_IetfCtx	Class ParagonIE_Sodium_Core32_ChaCha20_IetfCtx