ParagonIE_Sodium_Compat::crypto_stream_xchacha20_xor_ic( string $message, string $nonce, int $counter, string $key, bool $dontFallback = false ): string

Description

Compatibility

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

Parameters

$messagestring

Plaintext message

$noncestring

Number to be used Once; must be 24 bytes

$counterint

$keystring

Encryption key

$dontFallbackbooloptional

Default: false

Return value

string

Encrypted text which is vulnerable to chosen- ciphertext attacks unless you implement some other mitigation to the ciphertext (i.e.
Encrypt then MAC)

Performance profile

How much work a call to ParagonIE_Sodium_Compat::crypto_stream_xchacha20_xor_ic() 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

35–49

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 64.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

1

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

What one call costs · 4 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost ParagonIE_Sodium_Compat::crypto_stream_xchacha20_xor_ic() can have, taken from its control-flow graph on PHP 8.5.

Uses · 7

• sodium_crypto_stream_xchacha20_xor_ic()
• ParagonIE_Sodium_Core_Util::declareScalarType()If a variable does not match a given type, throw a TypeError.
• ParagonIE_Sodium_Core_Util::strlen()Safe string length
• SodiumException::__construct()
• ParagonIE_Sodium_Core_Util::store64_le()Stores a 64-bit integer as an string, treating it as little-endian.
• ParagonIE_Sodium_Core32_XChaCha20::streamXorIc()
• ParagonIE_Sodium_Core_XChaCha20::streamXorIc()

Used by · 1

• sodium_crypto_stream_xchacha20_xor_ic()

Source code

View on Trac ↗View on GitHub ↗

3621    public static function crypto_stream_xchacha20_xor_ic(3622        #[\SensitiveParameter]3623        $message,3624        $nonce,3625        $counter,3626        #[\SensitiveParameter]3627        $key,3628        $dontFallback = false3629    ) {3630        /* Type checks: */3631        ParagonIE_Sodium_Core_Util::declareScalarType($message, 'string', 1);3632        ParagonIE_Sodium_Core_Util::declareScalarType($nonce, 'string', 2);3633        ParagonIE_Sodium_Core_Util::declareScalarType($counter, 'int', 3);3634        ParagonIE_Sodium_Core_Util::declareScalarType($key, 'string', 4);3635 3636        /* Input validation: */3637        if (ParagonIE_Sodium_Core_Util::strlen($nonce) !== self::CRYPTO_STREAM_XCHACHA20_NONCEBYTES) {3638            throw new SodiumException('Argument 2 must be CRYPTO_SECRETBOX_XCHACHA20_NONCEBYTES long.');3639        }3640        if (ParagonIE_Sodium_Core_Util::strlen($key) !== self::CRYPTO_STREAM_XCHACHA20_KEYBYTES) {3641            throw new SodiumException('Argument 3 must be CRYPTO_SECRETBOX_XCHACHA20_KEYBYTES long.');3642        }3643 3644        if (is_callable('sodium_crypto_stream_xchacha20_xor_ic') && !$dontFallback) {3645            return sodium_crypto_stream_xchacha20_xor_ic($message, $nonce, $counter, $key);3646        }3647 3648        $ic = ParagonIE_Sodium_Core_Util::store64_le($counter);3649        if (PHP_INT_SIZE === 4) {3650            return ParagonIE_Sodium_Core32_XChaCha20::streamXorIc($message, $nonce, $key, $ic);3651        }3652        return ParagonIE_Sodium_Core_XChaCha20::streamXorIc($message, $nonce, $key, $ic);3653    }

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

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