/home/kueuepay/public_html/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();
    }
}
Path: home/kueuepay/public_html/vendor/paragonie/sodium_compat/src/Core32
Best Practice
Developer
Back to Home page

Best Practices

To ensure a smooth integration process and optimal performance, follow these best practices:

  1. Use secure HTTPS connections for all API requests.
  2. Implement robust error handling to handle potential issues gracefully.
  3. Regularly update your integration to stay current with any API changes or enhancements.
Error Handling Examples