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Summery Summery
ParagonIE_Sodium_Core_ChaCha20_IetfCtx constructor.
Syntax Syntax
Parameters Parameters
- $key
-
(Optional) ChaCha20 key.
Default value: ''
- $iv
-
(Optional) Initialization Vector (a.k.a. nonce).
Default value: ''
- $counter
-
(Optional) The initial counter value. Defaults to 4 0x00 bytes.
Default value: ''
Source Source
File: wp-includes/sodium_compat/src/Core32/ChaCha20/IetfCtx.php
public function __construct($key = '', $iv = '', $counter = '')
{
if (self::strlen($iv) !== 12) {
throw new InvalidArgumentException('ChaCha20 expects a 96-bit nonce in IETF mode.');
}
parent::__construct($key, self::substr($iv, 0, 8), $counter);
if (!empty($counter)) {
$this->container[12] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($counter, 0, 4));
}
$this->container[13] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($iv, 0, 4));
$this->container[14] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($iv, 4, 4));
$this->container[15] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($iv, 8, 4));
}