带有钠整数错误的PHP random_bytes

Question

我正在尝试使用用于 IIS 的 PHP 7.2.7 中的随机字节和钠来加密字符串。

$nonce = random_bytes('SODIUM_CRYPTO_SECRETBOX_NONCEBYTES');

和

$nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES);

两者都返回此错误:

Uncaught TypeError: random_bytes() expects parameter 1 to be integer

但是这很好用

$key = random_bytes('SODIUM_CRYPTO_SECRETBOX_KEYBYTES');

谷歌似乎让我失望了，我在搜索时没有找到任何帮助。

Answer 1

更新

取决于您如何配置 PHP。您可能无法正确访问常量。

请运行此脚本，看看它是否对您的问题有帮助。让我知道结果是什么。

$extenstion = FALSE;
$constants = FALSE;

echo '<pre>';

if(in_array('libsodium', get_loaded_extensions())){

  $extenstion = TRUE;
  echo 'Libsodium IS installed.<br>';

}else{

  echo 'Libsodium IS NOT installed.<br>';

  }

$constantsArray = get_defined_constants(true);

if(isset($constantsArray['libsodium']) && $constantsArray['libsodium']){

  $constants = TRUE;

  echo 'You HAVE predefined Libsodium constants.<br>';

}else{

  echo 'You DO NOT have any predefined Libsodium constants.<br>';

}

if($extenstion === TRUE && $constants === TRUE){

  foreach($constantsArray['libsodium'] as $constant=>$value){

    if(preg_match('/CRYPTO_SECRETBOX_NONCEBYTES|CRYPTO_SECRETBOX_KEYBYTES/', $constant)){

      echo 'Your predefined constant\'s name is set as this: ' . $constant . ' To use in your functions: random_bytes(' . $constant . ');' .  '<br>';

    }

  }    

echo 'Here is a full list of your Libsodium constants:<br>';
print_r(get_defined_constants(true)['libsodium']);

}

//***Leave these commented out when you first run the test.***

//To see ALL of your constants uncomment this line:
//print_r(get_defined_constants(true));

//To see ALL of your extensions uncomment this line:
//print_r(get_loaded_extensions());

echo '</pre>';