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<?php
namespace Btccom\JustEncrypt;
use BitWasp\Buffertools\Buffer;
use BitWasp\Buffertools\BufferInterface;
class KeyDerivation
{
const HASHER = 'sha512';
const DEFAULT_SALTLEN = 10;
const DEFAULT_ITERATIONS = 35000;
const SUBKEY_ITERATIONS = 1;
const KEYLEN_BITS = 256;
/**
* @param int $length
* @return BufferInterface
*/
public static function generateSalt($length = self::DEFAULT_SALTLEN)
if (!is_int($length) || $length < 0 || $length > 128) {
throw new \RuntimeException('Invalid salt length, should be between 0 - 128 bytes');
}
return new Buffer(random_bytes($length));
* @param BufferInterface $password
* @param BufferInterface $salt
* @param int $iterations
public static function compute(BufferInterface $password, BufferInterface $salt, $iterations = self::DEFAULT_ITERATIONS)
$header = new HeaderBlob($salt->getSize(), $salt, $iterations);
return $header->deriveKey($password);
btccom /
justencrypt-php
