飞书小程序解密敏感数据

[laravel]

https://open.feishu.cn/document/uYjL24iN/ugjMx4COyEjL4ITM

示例中没有 php 语言，看来 php 是真的不重视了，上次集成 google firebase 也是，官方没提供 php 支持。

    if ($user) {
      $aesKey = base64_decode($user->sessionKey);
      $aesIV = base64_decode($iv);

      $aesCipher = base64_decode($encryptedData);
      $result = openssl_decrypt( $aesCipher, 'AES-128-CBC', $aesKey, 1, $aesIV );
      info( json_encode($result) );
      info( openssl_error_string() );
      /*$user->update([
        'avatarUrl' => $avatarUrl,
        'nickName' => $nickName,
      ]);*/
    }

报错

local.ERROR: openssl_decrypt(): IV passed is 24 bytes long which is longer than the 16 expected by selected cipher, truncating {"exception":"[object] (ErrorException(code: 0): openssl_decrypt(): IV passed is 24 bytes long which is longer than the 16 expected by selected cipher

[rekulas]

iv = 'f210af090c830cd5c47e67eeb4f52001';
错误很明显，iv 是 hex 你用 base64 解码那肯定错的 hex2bin

[laravel]

让我改好了

```
$aesKey = hex2bin($user->sessionKey);
$aesIV = hex2bin($iv);
```

但是又报

error:0606506D:digital envelope routines:EVP_DecryptFinal_ex:wrong final block length

这个应该好解决了

[laravel]

@rekulas 是啊，就是这里的问题，谢谢