ParagonIE_Sodium_Core32_HChaCha20

10class ParagonIE_Sodium_Core32_HChaCha20 extends ParagonIE_Sodium_Core32_ChaCha2011{12    /**13     * @param string $in14     * @param string $key15     * @param string|null $c16     * @return string17     * @throws SodiumException18     * @throws TypeError19     */20    public static function hChaCha20($in = '', $key = '', $c = null)21    {22        $ctx = array();23 24        if ($c === null) {25            $ctx[0] = new ParagonIE_Sodium_Core32_Int32(array(0x6170, 0x7865));26            $ctx[1] = new ParagonIE_Sodium_Core32_Int32(array(0x3320, 0x646e));27            $ctx[2] = new ParagonIE_Sodium_Core32_Int32(array(0x7962, 0x2d32));28            $ctx[3] = new ParagonIE_Sodium_Core32_Int32(array(0x6b20, 0x6574));29        } else {30            $ctx[0] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 0, 4));31            $ctx[1] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 4, 4));32            $ctx[2] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 8, 4));33            $ctx[3] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 12, 4));34        }35        $ctx[4]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 0, 4));36        $ctx[5]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 4, 4));37        $ctx[6]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 8, 4));38        $ctx[7]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 12, 4));39        $ctx[8]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 16, 4));40        $ctx[9]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 20, 4));41        $ctx[10] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 24, 4));42        $ctx[11] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 28, 4));43        $ctx[12] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 0, 4));44        $ctx[13] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 4, 4));45        $ctx[14] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 8, 4));46        $ctx[15] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 12, 4));47 48        return self::hChaCha20Bytes($ctx);49    }50 51    /**52     * @param array $ctx53     * @return string54     * @throws SodiumException55     * @throws TypeError56     */57    protected static function hChaCha20Bytes(array $ctx)58    {59        /** @var ParagonIE_Sodium_Core32_Int32 $x0 */60        $x0  = $ctx[0];61        /** @var ParagonIE_Sodium_Core32_Int32 $x1 */62        $x1  = $ctx[1];63        /** @var ParagonIE_Sodium_Core32_Int32 $x2 */64        $x2  = $ctx[2];65        /** @var ParagonIE_Sodium_Core32_Int32 $x3 */66        $x3  = $ctx[3];67        /** @var ParagonIE_Sodium_Core32_Int32 $x4 */68        $x4  = $ctx[4];69        /** @var ParagonIE_Sodium_Core32_Int32 $x5 */70        $x5  = $ctx[5];71        /** @var ParagonIE_Sodium_Core32_Int32 $x6 */72        $x6  = $ctx[6];73        /** @var ParagonIE_Sodium_Core32_Int32 $x7 */74        $x7  = $ctx[7];75        /** @var ParagonIE_Sodium_Core32_Int32 $x8 */76        $x8  = $ctx[8];77        /** @var ParagonIE_Sodium_Core32_Int32 $x9 */78        $x9  = $ctx[9];79        /** @var ParagonIE_Sodium_Core32_Int32 $x10 */80        $x10 = $ctx[10];81        /** @var ParagonIE_Sodium_Core32_Int32 $x11 */82        $x11 = $ctx[11];83        /** @var ParagonIE_Sodium_Core32_Int32 $x12 */84        $x12 = $ctx[12];85        /** @var ParagonIE_Sodium_Core32_Int32 $x13 */86        $x13 = $ctx[13];87        /** @var ParagonIE_Sodium_Core32_Int32 $x14 */88        $x14 = $ctx[14];89        /** @var ParagonIE_Sodium_Core32_Int32 $x15 */