晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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<?php
namespace Laravel\SerializableClosure\Signers;
use Laravel\SerializableClosure\Contracts\Signer;
class Hmac implements Signer
{
/**
* The secret key.
*
* @var string
*/
protected $secret;
/**
* Creates a new signer instance.
*
* @param string $secret
* @return void
*/
public function __construct($secret)
{
$this->secret = $secret;
}
/**
* Sign the given serializable.
*
* @param string $serialized
* @return array
*/
public function sign($serialized)
{
return [
'serializable' => $serialized,
'hash' => base64_encode(hash_hmac('sha256', $serialized, $this->secret, true)),
];
}
/**
* Verify the given signature.
*
* @param array{serializable: string, hash: string} $signature
* @return bool
*/
public function verify($signature)
{
return hash_equals(base64_encode(
hash_hmac('sha256', $signature['serializable'], $this->secret, true)
), $signature['hash']);
}
}