ParagonIE_Sodium_Core32_Curve25519::ge_p3_to_cached( ParagonIE_Sodium_Core32_Curve25519_Ge_P3 $p ): ParagonIE_Sodium_Core32_Curve25519_Ge_Cached

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$pParagonIE_Sodium_Core32_Curve25519_Ge_P3

Return value

ParagonIE_Sodium_Core32_Curve25519_Ge_Cached

Performance profile

How much work a call to ParagonIE_Sodium_Core32_Curve25519::ge_p3_to_cached() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Trivial

Touches nothing outside its own arguments.

Scaling

Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions

43–117

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 117.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

2

2 places in core call this, so the cost is paid more often than your own code shows.

What one call costs · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost ParagonIE_Sodium_Core32_Curve25519::ge_p3_to_cached() can have, taken from its control-flow graph on PHP 8.5.

Uses · 7

• ParagonIE_Sodium_Core32_Curve25519_Fe::fromArray()
• ParagonIE_Sodium_Core32_Int32::fromInt()
• ParagonIE_Sodium_Core32_Curve25519_Ge_Cached::__construct()ParagonIE_Sodium_Core32_Curve25519_Ge_Cached constructor.
• ParagonIE_Sodium_Core32_Curve25519::fe_add()Add two field elements.
• ParagonIE_Sodium_Core32_Curve25519::fe_sub()Subtract two field elements.
• ParagonIE_Sodium_Core32_Curve25519::fe_copy()Create a copy of a field element.
• ParagonIE_Sodium_Core32_Curve25519::fe_mul()Multiply two field elements

Used by · 2

• ParagonIE_Sodium_Core32_Curve25519::ge_double_scalarmult_vartime()
• ParagonIE_Sodium_Core32_Curve25519::ge_mul_l()multiply by the order of the main subgroup l = 2^252+27742317777372353535851937790883648493

Source code

View on Trac ↗View on GitHub ↗

1698    public static function ge_p3_to_cached(ParagonIE_Sodium_Core32_Curve25519_Ge_P3 $p)1699    {1700        static $d2 = null;1701        if ($d2 === null) {1702            $d2 = ParagonIE_Sodium_Core32_Curve25519_Fe::fromArray(1703                array(1704                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[0]),1705                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[1]),1706                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[2]),1707                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[3]),1708                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[4]),1709                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[5]),1710                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[6]),1711                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[7]),1712                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[8]),1713                    ParagonIE_Sodium_Core32_Int32::fromInt(self::$d2[9])1714                )1715            );1716        }1717        /** @var ParagonIE_Sodium_Core32_Curve25519_Fe $d2 */1718        $r = new ParagonIE_Sodium_Core32_Curve25519_Ge_Cached();1719        $r->YplusX = self::fe_add($p->Y, $p->X);1720        $r->YminusX = self::fe_sub($p->Y, $p->X);1721        $r->Z = self::fe_copy($p->Z);1722        $r->T2d = self::fe_mul($p->T, $d2);1723        return $r;1724    }

Changelog

Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/sodium_compat/src/Core32/Curve25519.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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