ParagonIE_Sodium_Core32_ChaCha20

10class ParagonIE_Sodium_Core32_ChaCha20 extends ParagonIE_Sodium_Core32_Util11{12    /**13     * The ChaCha20 quarter round function. Works on four 32-bit integers.14     *15     * @internal You should not use this directly from another application16     *17     * @param ParagonIE_Sodium_Core32_Int32 $a18     * @param ParagonIE_Sodium_Core32_Int32 $b19     * @param ParagonIE_Sodium_Core32_Int32 $c20     * @param ParagonIE_Sodium_Core32_Int32 $d21     * @return array<int, ParagonIE_Sodium_Core32_Int32>22     * @throws SodiumException23     * @throws TypeError24     */25    protected static function quarterRound(26        ParagonIE_Sodium_Core32_Int32 $a,27        ParagonIE_Sodium_Core32_Int32 $b,28        ParagonIE_Sodium_Core32_Int32 $c,29        ParagonIE_Sodium_Core32_Int32 $d30    ) {31        /** @var ParagonIE_Sodium_Core32_Int32 $a */32        /** @var ParagonIE_Sodium_Core32_Int32 $b */33        /** @var ParagonIE_Sodium_Core32_Int32 $c */34        /** @var ParagonIE_Sodium_Core32_Int32 $d */35 36        # a = PLUS(a,b); d = ROTATE(XOR(d,a),16);37        $a = $a->addInt32($b);38        $d = $d->xorInt32($a)->rotateLeft(16);39 40        # c = PLUS(c,d); b = ROTATE(XOR(b,c),12);41        $c = $c->addInt32($d);42        $b = $b->xorInt32($c)->rotateLeft(12);43 44        # a = PLUS(a,b); d = ROTATE(XOR(d,a), 8);45        $a = $a->addInt32($b);46        $d = $d->xorInt32($a)->rotateLeft(8);47 48        # c = PLUS(c,d); b = ROTATE(XOR(b,c), 7);49        $c = $c->addInt32($d);50        $b = $b->xorInt32($c)->rotateLeft(7);51 52        return array($a, $b, $c, $d);53    }54 55    /**56     * @internal You should not use this directly from another application57     *58     * @param ParagonIE_Sodium_Core32_ChaCha20_Ctx $ctx59     * @param string $message60     *61     * @return string62     * @throws SodiumException63     * @throws TypeError64     */65    public static function encryptBytes(66        ParagonIE_Sodium_Core32_ChaCha20_Ctx $ctx,67        $message = ''68    ) {69        $bytes = self::strlen($message);70 71        /** @var ParagonIE_Sodium_Core32_Int32 $x0 */72        /** @var ParagonIE_Sodium_Core32_Int32 $x1 */73        /** @var ParagonIE_Sodium_Core32_Int32 $x2 */74        /** @var ParagonIE_Sodium_Core32_Int32 $x3 */75        /** @var ParagonIE_Sodium_Core32_Int32 $x4 */76        /** @var ParagonIE_Sodium_Core32_Int32 $x5 */77        /** @var ParagonIE_Sodium_Core32_Int32 $x6 */78        /** @var ParagonIE_Sodium_Core32_Int32 $x7 */79        /** @var ParagonIE_Sodium_Core32_Int32 $x8 */80        /** @var ParagonIE_Sodium_Core32_Int32 $x9 */81        /** @var ParagonIE_Sodium_Core32_Int32 $x10 */82        /** @var ParagonIE_Sodium_Core32_Int32 $x11 */83        /** @var ParagonIE_Sodium_Core32_Int32 $x12 */84        /** @var ParagonIE_Sodium_Core32_Int32 $x13 */85        /** @var ParagonIE_Sodium_Core32_Int32 $x14 */86        /** @var ParagonIE_Sodium_Core32_Int32 $x15 */87 88        /*89        j0 = ctx->input[0];