ParagonIE_Sodium_Core32_Curve25519::ge_double_scalarmult_vartime( string $a, ParagonIE_Sodium_Core32_Curve25519_Ge_P3 $A, string $b ): ParagonIE_Sodium_Core32_Curve25519_Ge_P2

2011    public static function ge_double_scalarmult_vartime(2012        $a,2013        ParagonIE_Sodium_Core32_Curve25519_Ge_P3 $A,2014        $b2015    ) {2016        /** @var array<int, ParagonIE_Sodium_Core32_Curve25519_Ge_Cached> $Ai */2017        $Ai = array();2018 2019        static $Bi = array();2020        /** @var array<int, ParagonIE_Sodium_Core32_Curve25519_Ge_Precomp> $Bi */2021        if (!$Bi) {2022            for ($i = 0; $i < 8; ++$i) {2023                $Bi[$i] = new ParagonIE_Sodium_Core32_Curve25519_Ge_Precomp(2024                    ParagonIE_Sodium_Core32_Curve25519_Fe::fromArray(2025                        array(2026                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][0]),2027                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][1]),2028                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][2]),2029                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][3]),2030                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][4]),2031                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][5]),2032                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][6]),2033                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][7]),2034                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][8]),2035                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][0][9])2036                        )2037                    ),2038                    ParagonIE_Sodium_Core32_Curve25519_Fe::fromArray(2039                        array(2040                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][0]),2041                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][1]),2042                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][2]),2043                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][3]),2044                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][4]),2045                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][5]),2046                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][6]),2047                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][7]),2048                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][8]),2049                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][1][9])2050                        )2051                    ),2052                    ParagonIE_Sodium_Core32_Curve25519_Fe::fromArray(2053                        array(2054                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][0]),2055                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][1]),2056                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][2]),2057                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][3]),2058                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][4]),2059                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][5]),2060                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][6]),2061                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][7]),2062                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][8]),2063                            ParagonIE_Sodium_Core32_Int32::fromInt(self::$base2[$i][2][9])2064                        )2065                    )2066                );2067            }2068        }2069 2070        for ($i = 0; $i < 8; ++$i) {2071            $Ai[$i] = new ParagonIE_Sodium_Core32_Curve25519_Ge_Cached(2072                self::fe_0(),2073                self::fe_0(),2074                self::fe_0(),2075                self::fe_0()2076            );2077        }2078        /** @var array<int, ParagonIE_Sodium_Core32_Curve25519_Ge_Cached> $Ai */2079 2080        # slide(aslide,a);2081        # slide(bslide,b);2082        /** @var array<int, int> $aslide */2083        $aslide = self::slide($a);2084        /** @var array<int, int> $bslide */2085        $bslide = self::slide($b);2086 2087        # ge_p3_to_cached(&Ai[0],A);2088        # ge_p3_dbl(&t,A); ge_p1p1_to_p3(&A2,&t);2089        $Ai[0] = self::ge_p3_to_cached($A);2090        $t = self::ge_p3_dbl($A);