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<?php
namespace Laminas\Crypt;
use function hash;
use function hash_algos;
use function in_array;
use function mb_strlen;
use function strtolower;
class Hash
{
public const OUTPUT_STRING = false;
public const OUTPUT_BINARY = true;
/**
* Last algorithm supported
*
* @var string|null
*/
protected static $lastAlgorithmSupported;
/**
* @param string $hash
* @param string $data
* @param bool $output
* @throws Exception\InvalidArgumentException
* @return string
*/
public static function compute($hash, $data, $output = self::OUTPUT_STRING)
{
if (! $hash || ($hash !== static::$lastAlgorithmSupported && ! static::isSupported($hash))) {
throw new Exception\InvalidArgumentException(
'Hash algorithm provided is not supported on this PHP installation'
);
}
return hash($hash, $data, $output);
}
/**
* Get the output size according to the hash algorithm and the output format
*
* @param string $hash
* @param bool $output
* @return int
*/
public static function getOutputSize($hash, $output = self::OUTPUT_STRING)
{
return mb_strlen(static::compute($hash, 'data', $output), '8bit');
}
/**
* Get the supported algorithm
*
* @return array
*/
public static function getSupportedAlgorithms()
{
return hash_algos();
}
/**
* Is the hash algorithm supported?
*
* @param string $algorithm
* @return bool
*/
public static function isSupported($algorithm)
{
if ($algorithm === static::$lastAlgorithmSupported) {
return true;
}
if (in_array(strtolower($algorithm), hash_algos(), true)) {
static::$lastAlgorithmSupported = $algorithm;
return true;
}
return false;
}
/**
* Clear the cache of last algorithm supported
*/
public static function clearLastAlgorithmCache()
{
static::$lastAlgorithmSupported = null;
}
}