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POUnable to exchange data encrypted with AES-256 between Java and PHP
 

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    <p>My problem is: what I encrypt in Java I can decrypt perfectly in Java, but PHP <code>mcrypt</code> can't decrypt. What I encrypt with <code>mcrypt</code> I can decrypt with <code>mcrypt</code>, but can't in Java.</p> <p>I want to send and receive encrypted data from a Java application to a PHP page, so I need it to be compatible.</p> <p>Here's what I have...</p> <p>JAVA...</p> <pre><code>public static String crypt(String input, String key){ byte[] crypted = null; try{ SecretKeySpec skey = new SecretKeySpec(Base64.decodeBase64(key), "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, skey); crypted = cipher.doFinal(input.getBytes()); }catch(Exception e){ } return Base64.encodeBase64String(crypted); } public static String decrypt(String input, String key){ byte[] output = null; try{ SecretKeySpec skey = new SecretKeySpec(Base64.decodeBase64(key), "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, skey); output = cipher.doFinal(Base64.decodeBase64(input)); }catch(Exception e){ } return new String(output); } </code></pre> <p>Running:</p> <pre><code>public static void main(String[] args) { String key = "Zvzpv8/PXbezPCZpxzQKzL/FeoPw68jIb+NONX/LIi8="; String data = "example"; System.out.println(Cpt.decrypt(Cpt.crypt(data, key), key)); } </code></pre> <p>Output:</p> <pre><code>example </code></pre> <p>PHP...</p> <pre><code>function getEncrypt($sStr, $sKey) { return base64_encode( mcrypt_encrypt( MCRYPT_RIJNDAEL_256, $sKey, $sStr, MCRYPT_MODE_ECB ) ); } function getDecrypt($sStr, $sKey) { return mcrypt_decrypt( MCRYPT_RIJNDAEL_256, $sKey, base64_decode($sStr), MCRYPT_MODE_ECB ); } </code></pre> <p>Running:</p> <pre><code>$crypt = getDecrypt(getEncrypt($str, $key), $key); echo "&lt;p&gt;Crypt: $crypt&lt;/p&gt;"; </code></pre> <p>Output:</p> <pre><code>Crypt: example������������������������� </code></pre> <p>Using PHP to crypt "example" with key "Zvzpv8/PXbezPCZpxzQKzL/FeoPw68jIb+NONX/LIi8=" I get "YTYhgp4zC+w5IsViTR5PUkHMX4i7JzvA6NJT1FqhoGY=". Using Java to crypt the same thing with the same key I get "+tdAZqTE7WAVPXhB3Tp5+g==".</p> <p>I'm encoding and decoding to base64 in the right order and I tested base64 encode and decode compatibility between Java and PHP and it's working.</p>
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