How to Decrypt PHP Encrypted Data with Javascript (CryptoJS)?

Cross-Platform Encryption: PHP Encryption with Javascript (cryptojs) Decryption

Encrypting and decrypting data across different platforms can often be a challenge. This article aims to provide a solution by leveraging PHP encryption with Javascript (cryptojs) decryption.

Consider the following scenario: you want to encrypt data on your server using PHP and decrypt it on the frontend using Javascript (cryptojs). To achieve this, let's consider the provided example.

PHP Encryption

<br>require('cryptojs-aes.php');</p>
<p>$text = "this is the text here";<br>$key = "encryptionkey";</p>
<p>$msgEncrypted = cryptoJsAesEncrypt($key, $text);<br>echo "<h2>PHP</h2>";<br>echo "<p>Encrypted:</p>";<br>echo $msgEncrypted;<br>

Javascript Decryption

<br>var key = 'encryptionkey';<br>var encrypted = "<?php echo $msgEncrypted ?>";</p>
<p>// Decrypt using cryptojs<br>var decrypted = CryptoJS.AES.decrypt(encrypted, key);<br>console.log( decrypted.toString(CryptoJS.enc.Utf8) );<br>

The missing step in the provided code is in the Javascript decryption. To correctly decrypt the encrypted data, you should use the CryptoJSAesJson format from the CryptoJS library. Here's the corrected code:

<br>var key = 'encryptionkey';<br>var encrypted = "<?php echo $msgEncrypted ?>";</p>
<p>// Parse the encrypted data using CryptoJSAesJson<br>var cipherParams = CryptoJSAesJson.parse(encrypted);</p>
<p>// Decrypt using cryptojs<br>var decrypted = CryptoJS.AES.decrypt(cipherParams, key);<br>console.log( decrypted.toString(CryptoJS.enc.Utf8) );<br>

By following this approach, you can effectively encrypt data in PHP and decrypt it in Javascript (cryptojs), enabling secure data handling across different platforms.

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