用PHP进行加密和解密

Question

null

下面是我当前的代码：

    function tnsencrypt($master_code,$text) { //the text to be encrypted $plain_text= $text;

//letters of alphabet array $alphabet=array('0','1','2','3','4','5','6','7','8','9','=','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z');

//$alphabet_len = count($alphabet); //$signature_len = 17; // signature=TnpMsgE //$master_code_len = 10; $mcursor = 0;

//positions of the letters in alphabet : The array_flip() function returns an array with all the original keys as values, and all original values as keys. $flip=array_flip($alphabet); //plaintext array $plain_text=str_split($plain_text); $master_code=str_split($master_code);

$n=count($plain_text); $encrypted_text=''; for ($i=0; $i }

}

//echo $encrypted_text; return $encrypted_text; }

function tnsdecrypt($master_code,$text) { //the text to be decrypted $encrypted_text= $text;

//letters of alphabet array $alphabet=array('0','1','2','3','4','5','6','7','8','9','=','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'); //positions of the letters in alphabet : The array_flip() function returns an array with all the original keys as values, and all original values as keys. $flip=array_flip($alphabet);

//plaintext array $encrypted_text=str_split($encrypted_text); $master_code=str_split($master_code);

$n=count($encrypted_text); $decrypted_text=''; for ($i=0; $i

} else {
    $decrypted_text.= $encrypted_text[$i];  
}
//move mcursor
$mcursor = ($mcursor+1)%10;
}

//echo $encrypted_text; return $decrypted_text;

}

if(isset($_POST["text"])) { $text = $_POST["text"]; $shifttext = $_POST["shifttext"]; echo "
Encrypted Text: ".tnsencrypt($shifttext,$text); echo "
Decrypted Text: ".tnsdecrypt($shifttext,tnsencrypt($shifttext,$text));

}

?> 

以下是我的结果：

原文:val1=1234567 val2=abcdef val3=abcdef

正如您所看到的，加密中缺少几个字符，这也影响了解密。缺的是2号线的v和3号线的v

你知道为什么吗？

Answer 1

你为什么要这么做？您可以使用几种单向和双向加密解决方案，如果这是为了实际使用，而不仅仅是学术练习：

单向:crypt()
双向:mcrypt

加密几乎是一个解决的问题。