如何加密和解密PHP字符串？ [英] How do you Encrypt and Decrypt a PHP String?

问题描述

我的意思是：

 原始字串+盐或键 - >加密字符串
加密字符串+盐或键 - >解密（原始字符串）
  

可能类似：

 hello world！ +ABCD1234 - >加密 - > 2a2ffa8f13220befbe30819047e23b2c（例如可以是）
2a2ffa8f13220befbe30819047e23b2c - >使用ABCD1234解密 - > 你好，世界！ 
  
 
 
 
 
 
在PHP中，您如何做？
 
 
 
 
 
尝试使用  Crypt_Blowfish   
解决方案
 不起作用 
 
 
 警告：
 
此答案使用 ECB 。 ECB不是加密模式，它只是一个构建块。使用ECB，如本答案所示，实际上并不加密字符串。不要在代码中使用ECB。有关解决方案，请参见 Scott的回答。 
 
 
我得到了自己。实际上，我发现一些答案谷歌和只是修改的东西。 然而，结果是完全不安全。 
 <？php 
 define（ENCRYPTION_KEY ，！@＃$％^& *）; 
 $ string =这是原始数据字符串！ 
 
 echo $ encrypted = encrypt（$ string，ENCRYPTION_KEY）; 
 echo< br />; 
 echo $ decryptpted = decrypt（$ encrypted，ENCRYPTION_KEY）; 
 
 / ** 
 *返回加密的& utf8-encoded 
 * / 
 function encrypt（$ pure_string，$ encryption_key）{
 $ iv_size = mcrypt_get_iv_size（MCRYPT_BLOWFISH，MCRYPT_MODE_ECB）; 
 $ iv = mcrypt_create_iv（$ iv_size，MCRYPT_RAND）; 
 $ encrypted_string = mcrypt_encrypt（MCRYPT_BLOWFISH，$ encryption_key，utf8_encode（$ pure_string），MCRYPT_MODE_ECB，$ iv）; 
 return $ encrypted_string; 
} 
 
 / ** 
 *返回解密的原始字符串
 * / 
函数decrypt（$ encrypted_string，$ encryption_key）{
 $ iv_size = mcrypt_get_iv_size（MCRYPT_BLOWFISH，MCRYPT_MODE_ECB）; 
 $ iv = mcrypt_create_iv（$ iv_size，MCRYPT_RAND）; 
 $ decryptpted_string = mcrypt_decrypt（MCRYPT_BLOWFISH，$ encryption_key，$ encrypted_string，MCRYPT_MODE_ECB，$ iv）; 
 return $ decryptpted_string; 
} 
？> 
  
 
What I mean is:
Original String + Salt or Key --> Encrypted String
Encrypted String + Salt or Key --> Decrypted (Original String)
Maybe something like:
"hello world!" + "ABCD1234" --> Encrypt --> "2a2ffa8f13220befbe30819047e23b2c" (may be, for e.g)
"2a2ffa8f13220befbe30819047e23b2c" --> Decrypt with "ABCD1234" --> "hello world!"



In PHP, how can you do this?


Attempted to use Crypt_Blowfish, but it didn't work for me.
解决方案
What not to do

  
WARNING:

  This answer uses ECB. ECB is not an encryption mode, it's only a building block. Using ECB as demonstrated in this answer does not actually encrypt the string securely. Do not use ECB in your code. See Scott's answer for a good solution.
I got it on myself. Actually i found some answer on google and just modified something. The result is completely insecure however.
<?php
define("ENCRYPTION_KEY", "!@#$%^&*");
$string = "This is the original data string!";

echo $encrypted = encrypt($string, ENCRYPTION_KEY);
echo "<br />";
echo $decrypted = decrypt($encrypted, ENCRYPTION_KEY);

/**
 * Returns an encrypted & utf8-encoded
 */
function encrypt($pure_string, $encryption_key) {
    $iv_size = mcrypt_get_iv_size(MCRYPT_BLOWFISH, MCRYPT_MODE_ECB);
    $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
    $encrypted_string = mcrypt_encrypt(MCRYPT_BLOWFISH, $encryption_key, utf8_encode($pure_string), MCRYPT_MODE_ECB, $iv);
    return $encrypted_string;
}

/**
 * Returns decrypted original string
 */
function decrypt($encrypted_string, $encryption_key) {
    $iv_size = mcrypt_get_iv_size(MCRYPT_BLOWFISH, MCRYPT_MODE_ECB);
    $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
    $decrypted_string = mcrypt_decrypt(MCRYPT_BLOWFISH, $encryption_key, $encrypted_string, MCRYPT_MODE_ECB, $iv);
    return $decrypted_string;
}
?>


                        
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