mcrypt_encrypt无法初始化
[英]mcrypt_encrypt fails to initialise
问题描述
I am trying to encrypt some data in PHP using the Rijndael cipher in CBC mode with a 256bit key but for some reason I get the following error message: 
我正在尝试使用Rijndael密码在CBC模式下使用256位密钥对PHP中的某些数据进行加密，但是由于某些原因，我收到以下错误消息：
mcrypt_encrypt() Module initialization failed mcrypt_encrypt（）模块初始化失败
My code: 我的代码：
$hashKey = hash('sha256',$key);
$iv = hash('sha256',$hashKey);
// ------Cipher-------------key-------------Data-------------Mode---------IV--
$encryptedQuestion = base64_encode(mcrypt_encrypt('MCRYPT_RIJNDAEL_256', $hashKey , $_POST['question'], MCRYPT_MODE_CBC, $iv));
Can anyone see whats wrong with this? 谁能看到这有什么问题吗？
3 个解决方案
解决方案1
5 已采纳 2012-09-04 15:36:18
There are a few issues with the code that I can spot: 我可以发现一些代码问题：
Your
$ivshould not be dependent on$hashKey;您的$iv不应依赖于$hashKey; rather, you should create it separately usingmcrypt_create_iv().相反，您应该使用mcrypt_create_iv()单独创建它。Your
$hashKeyshould be binary rather than textual.您的$hashKey应该是二进制而不是文本。MCRYPT_RIJNDAEL_256is a constant, it should not be passed as a string.MCRYPT_RIJNDAEL_256是一个常数，不应将其作为字符串传递。
The following code is more verbose than yours, but it should give you an insight in the steps required to encrypt something: 以下代码比您的代码更冗长，但是它应该使您了解加密某些内容所需的步骤：
$crypto = mcrypt_module_open(MCRYPT_RIJNDAEL_256, '', MCRYPT_MODE_CBC, '');
$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($crypto), MCRYPT_DEV_URANDOM);
$hkey = hash('sha256', $key, true);
mcrypt_generic_init($handle, $hkey, $iv);
$enc_question = mcrypt_generic($handle, $_POST['question']);
mcrypt_generic_deinit($handle);
mcrypt_module_close($handle);
I've also left out any error checks. 我也没有进行任何错误检查。
解决方案2
0 2014-11-11 12:38:58
I got a similar error. 我也遇到类似的错误。 I assigned the constants to a variable and passed the variable and that was the cause of the error. 我将常量分配给变量，然后将其传递给变量，这就是错误的原因。
This failed for me > return new encKey($cipher_name, $mode, $value); 这对我来说失败了>返回新的encKey（$ cipher_name，$ mode，$ value）;
Now this works > return new encKey(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB, $value); 现在可以正常工作>返回新的encKey（MCRYPT_RIJNDAEL_256，MCRYPT_MODE_ECB，$ value）;
解决方案3
0 2015-01-26 07:17:14
In php 5.6 try mcrypt_ecb to overcome the invalid key issue 在php 5.6中尝试使用mcrypt_ecb来解决无效密钥问题
$choice ="2";
$key = "1234";
$key = hash("sha512", $key, TRUE);
for ($x = 0; $x < 8; $x++) {
$key = $key . substr($key, $x, 1);
}
$msg = "pato";
echo("key is".$key." \n");
if ($msg == ''){
die("Please enter a text to encrypt! ");
}
if ($key == ''){
die("Please enter a key! ");
}
function pkcs5_pad($text, $blocksize) {
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
function pkcs_pad($text, $blocksize) {
//$pad = $blocksize - (strlen($text) % $blocksize);
$tes=substr($text,0,$blocksize) ;
return $tes;
}
function encryptnow( $thekey, $themsg)
{
$padded = pkcs5_pad($themsg, mcrypt_get_block_size(MCRYPT_3DES, MCRYPT_MODE_CBC));
echo("padded".$padded."\n");
$keypad = pkcs_pad($thekey, mcrypt_get_key_size(MCRYPT_3DES, MCRYPT_MODE_CBC));
$i;
//$iv=pkcs5_pad($i, mcrypt_get_block_size(MCRYPT_3DES, MCRYPT_MODE_CBC));
//$iv = mcrypt_create_iv(8, MCRYPT_DEV_RANDOM);
// echo("padded".$keypad."\n");
$encrypted = base64_encode(mcrypt_ecb(MCRYPT_3DES, $keypad, $padded, MCRYPT_MODE_CBC));
echo "<html><hr size='2' ></html>";
echo "<P><P><b>Plain Text : </b>";
echo($themsg);
echo "<p><b>Cipher Text : </b> ";
echo "$encrypted";
die();
}
if ($choice == '2'){
encryptnow($key, $msg);
}
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