Encryption failure because of trim()
>>> [!note] Migrated issue
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<!-- Migrated from issue #2053257. -->
Reported by: [epicflux](https://www.drupal.org/user/10037)
>>>
<p>I'm experiencing failures with encrypting and decrypting some serialized arrays of data. It appears to be related to the use of trim() in encrypt_encrypt_mcrypt_rij_256 when returning the encrypted data.</p>
<p>While the use of trim when working with data returned by the mcrypt function appears to be a suggested approach its not really clear to me why the data needs to be trimmed.</p>
<p>The example code below will encrypt and decrypt the array using the Encrypt module's functions, then it will use the mcrypt functions directly. The Encrypt module functions will fail unless you remove the trim() from encrypt_encrypt_mcrypt_rij_256.</p>
<p>I'm using php 5.4.6 with mcrypt 2.5.8; I've been able to reproduce on other configurations.</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br>$array </span><span style="color: #007700">= </span><span style="color: #DD0000">'a:8:{s:14:"payment_method";s:12:"bank account";s:14:"payment_fields";a:2:{s:12:"bank account";a:4:{s:9:"bank_name";s:9:"Sovereign";s:14:"routing_number";s:9:"000000000";s:14:"account_number";s:3:"099";s:12:"account_type";s:8:"Checking";}s:12:"back account";a:1:{s:14:"routing_number";s:3:"150";}}s:7:"message";s:90:"<b>!status:</b> !response_message Response code: !response_code; Reason code: !reason_code";s:6:"txn_id";s:9:"100136623";s:9:"remote_id";s:9:"100136623";s:14:"transaction_id";s:6:"113055";s:6:"status";s:7:"success";s:13:"remote_status";b:1;}'</span><span style="color: #007700">;<br><br></span><span style="color: #0000BB">$array </span><span style="color: #007700">= </span><span style="color: #0000BB">unserialize</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">);<br></span><span style="color: #0000BB">$array</span><span style="color: #007700">[</span><span style="color: #DD0000">'message'</span><span style="color: #007700">] = </span><span style="color: #0000BB">check_plain</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">[</span><span style="color: #DD0000">'message'</span><span style="color: #007700">]);<br></span><span style="color: #0000BB">$array</span><span style="color: #007700">[</span><span style="color: #DD0000">'message'</span><span style="color: #007700">] .= </span><span style="color: #0000BB">str_repeat</span><span style="color: #007700">(</span><span style="color: #DD0000">'a'</span><span style="color: #007700">, </span><span style="color: #0000BB">10000</span><span style="color: #007700">);<br></span><span style="color: #0000BB">$array</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">] = </span><span style="color: #DD0000">'ben'</span><span style="color: #007700">;<br><br></span><span style="color: #0000BB">$encrypt </span><span style="color: #007700">= </span><span style="color: #0000BB">encrypt</span><span style="color: #007700">(</span><span style="color: #0000BB">serialize</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">));<br></span><span style="color: #0000BB">drupal_set_message</span><span style="color: #007700">(</span><span style="color: #DD0000">'$encrypt: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">$encrypt</span><span style="color: #007700">);<br><br></span><span style="color: #0000BB">$decrypt </span><span style="color: #007700">= </span><span style="color: #0000BB">unserialize</span><span style="color: #007700">(</span><span style="color: #0000BB">decrypt</span><span style="color: #007700">(</span><span style="color: #0000BB">$encrypt</span><span style="color: #007700">));<br></span><span style="color: #0000BB">drupal_set_message</span><span style="color: #007700">(</span><span style="color: #DD0000">'$decrypt: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">$decrypt</span><span style="color: #007700">);<br><br></span><span style="color: #0000BB">$key </span><span style="color: #007700">= </span><span style="color: #0000BB">drupal_substr</span><span style="color: #007700">(</span><span style="color: #0000BB">variable_get</span><span style="color: #007700">(</span><span style="color: #DD0000">'drupal_private_key'</span><span style="color: #007700">, </span><span style="color: #DD0000">'no_key'</span><span style="color: #007700">), </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">32</span><span style="color: #007700">);<br><br></span><span style="color: #0000BB">$text </span><span style="color: #007700">= </span><span style="color: #0000BB">serialize</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">);<br><br></span><span style="color: #FF8000">// Define iv cipher<br></span><span style="color: #0000BB">$iv_size </span><span style="color: #007700">= </span><span style="color: #0000BB">mcrypt_get_iv_size</span><span style="color: #007700">(</span><span style="color: #0000BB">MCRYPT_RIJNDAEL_256</span><span style="color: #007700">, </span><span style="color: #0000BB">MCRYPT_MODE_ECB</span><span style="color: #007700">);<br></span><span style="color: #0000BB">$iv </span><span style="color: #007700">= </span><span style="color: #0000BB">mcrypt_create_iv</span><span style="color: #007700">(</span><span style="color: #0000BB">$iv_size</span><span style="color: #007700">, </span><span style="color: #0000BB">MCRYPT_RAND</span><span style="color: #007700">);<br><br></span><span style="color: #0000BB">$encrypt_text </span><span style="color: #007700">= </span><span style="color: #0000BB">mcrypt_encrypt</span><span style="color: #007700">(</span><span style="color: #0000BB">MCRYPT_RIJNDAEL_256</span><span style="color: #007700">, </span><span style="color: #0000BB">$key</span><span style="color: #007700">, </span><span style="color: #0000BB">$text</span><span style="color: #007700">, </span><span style="color: #0000BB">MCRYPT_MODE_ECB</span><span style="color: #007700">, </span><span style="color: #0000BB">$iv</span><span style="color: #007700">);<br><br></span><span style="color: #0000BB">drupal_set_message</span><span style="color: #007700">(</span><span style="color: #0000BB">$encrypt_text</span><span style="color: #007700">);<br><br></span><span style="color: #0000BB">$decrypt_text </span><span style="color: #007700">= </span><span style="color: #0000BB">mcrypt_decrypt</span><span style="color: #007700">(</span><span style="color: #0000BB">MCRYPT_RIJNDAEL_256</span><span style="color: #007700">, </span><span style="color: #0000BB">$key</span><span style="color: #007700">, </span><span style="color: #0000BB">$encrypt_text</span><span style="color: #007700">, </span><span style="color: #0000BB">MCRYPT_MODE_ECB</span><span style="color: #007700">, </span><span style="color: #0000BB">$iv</span><span style="color: #007700">);<br><br></span><span style="color: #0000BB">drupal_set_message</span><span style="color: #007700">(</span><span style="color: #0000BB">$decrypt_text</span><span style="color: #007700">);<br></span><span style="color: #0000BB">?></span></span></pre></div>
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