ParagonIE_Sodium_Core_BLAKE2b::context(): SplFixedArray

Compatibility

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

Return value

SplFixedArray

Performance profile

How much work a call to ParagonIE_Sodium_Core_BLAKE2b::context() 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

Light

Touches nothing outside its own arguments.

Scaling

Scales with input

The body loops, so the work grows with how much data it finds.

Instructions

54

Executed per call on PHP 8.5. The body compiles to 62.

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 · 1 distinct outcome

One number would be a lie: the work depends on which branch runs. These are every distinct cost ParagonIE_Sodium_Core_BLAKE2b::context() can have, taken from its control-flow graph on PHP 8.5.

Uses · 2

• SplFixedArray::__construct()SplFixedArray constructor.
• ParagonIE_Sodium_Core_BLAKE2b::new64()Turn two 32-bit integers into a fixed array representing a 64-bit integer.

Used by · 2

• ParagonIE_Sodium_Core_BLAKE2b::init()
• ParagonIE_Sodium_Core_BLAKE2b::stringToContext()Creates an SplFixedArray containing other SplFixedArray elements, from a string (compatible with \Sodium\crypto_generichash_{init, update, final})

Source code

View on Trac ↗View on GitHub ↗

307    protected static function context()308    {309        $ctx    = new SplFixedArray(6);310        $ctx[0] = new SplFixedArray(8);   // h311        $ctx[1] = new SplFixedArray(2);   // t312        $ctx[2] = new SplFixedArray(2);   // f313        $ctx[3] = new SplFixedArray(256); // buf314        $ctx[4] = 0;                      // buflen315        $ctx[5] = 0;                      // last_node (uint8_t)316 317        for ($i = 8; $i--;) {318            $ctx[0][$i] = self::$iv[$i];319        }320        for ($i = 256; $i--;) {321            $ctx[3][$i] = 0;322        }323 324        $zero = self::new64(0, 0);325        $ctx[1][0] = $zero;326        $ctx[1][1] = $zero;327        $ctx[2][0] = $zero;328        $ctx[2][1] = $zero;329 330        return $ctx;331    }

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/Core/BLAKE2b.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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