ParagonIE_Sodium_Core32_Curve25519::fe_invert( ParagonIE_Sodium_Core32_Curve25519_Fe $Z ): ParagonIE_Sodium_Core32_Curve25519_Fe

1136    public static function fe_invert(ParagonIE_Sodium_Core32_Curve25519_Fe $Z)1137    {1138        $z = clone $Z;1139        $t0 = self::fe_sq($z);1140        $t1 = self::fe_sq($t0);1141        $t1 = self::fe_sq($t1);1142        $t1 = self::fe_mul($z, $t1);1143        $t0 = self::fe_mul($t0, $t1);1144        $t2 = self::fe_sq($t0);1145        $t1 = self::fe_mul($t1, $t2);1146        $t2 = self::fe_sq($t1);1147        for ($i = 1; $i < 5; ++$i) {1148            $t2 = self::fe_sq($t2);1149        }1150        $t1 = self::fe_mul($t2, $t1);1151        $t2 = self::fe_sq($t1);1152        for ($i = 1; $i < 10; ++$i) {1153            $t2 = self::fe_sq($t2);1154        }1155        $t2 = self::fe_mul($t2, $t1);1156        $t3 = self::fe_sq($t2);1157        for ($i = 1; $i < 20; ++$i) {1158            $t3 = self::fe_sq($t3);1159        }1160        $t2 = self::fe_mul($t3, $t2);1161        $t2 = self::fe_sq($t2);1162        for ($i = 1; $i < 10; ++$i) {1163            $t2 = self::fe_sq($t2);1164        }1165        $t1 = self::fe_mul($t2, $t1);1166        $t2 = self::fe_sq($t1);1167        for ($i = 1; $i < 50; ++$i) {1168            $t2 = self::fe_sq($t2);1169        }1170        $t2 = self::fe_mul($t2, $t1);1171        $t3 = self::fe_sq($t2);1172        for ($i = 1; $i < 100; ++$i) {1173            $t3 = self::fe_sq($t3);1174        }1175        $t2 = self::fe_mul($t3, $t2);1176        $t2 = self::fe_sq($t2);1177        for ($i = 1; $i < 50; ++$i) {1178            $t2 = self::fe_sq($t2);1179        }1180        $t1 = self::fe_mul($t2, $t1);1181        $t1 = self::fe_sq($t1);1182        for ($i = 1; $i < 5; ++$i) {1183            $t1 = self::fe_sq($t1);1184        }1185        return self::fe_mul($t1, $t0);1186    }