Databases
StackOverflow2013
Postsdbo
POAES-128 Encryption with Base64 Encoding doesn't act the same in Java and PHP with longer strings
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAES-128 Encryption with Base64 Encoding doesn't act the same in Java and PHP with longer strings
    primarykey
    data
    text
    <p>I have been trying to get Encryption/Decryption to work the same in Java (Android) and PHP and produce the same results for client/server communications.</p> <p>I'm using the code below for encryption, but I don't know what's wrong with it. Running both with the same key and small strings produce the same encrypted value, with longer strings however, I get two different results. PHP:</p> <pre class="lang-php prettyprint-override"><code>$str = 'test1234test1234'; $key = 'TESTKEYTESTKEY12'; $block = mcrypt_get_block_size('des', 'ecb'); $pad = $block - (strlen($str) % $block); $str .= str_repeat(chr($pad), $pad); echo base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $str, MCRYPT_MODE_ECB)); </code></pre> <p>and in Java ( on Android ):</p> <pre class="lang-java prettyprint-override"><code>public static String encryptTest() { String cleartext = "test1234test1234"; String key = "TESTKEYTESTKEY12"; byte[] raw = key.getBytes(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); try { Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec); byte[] encrypted; encrypted = cipher.doFinal(cleartext.getBytes()); return new String(Base64.encode(encrypted,Base64.DEFAULT)); } catch (Exception e) { e.printStackTrace(); } return null; } </code></pre> <p>Running this with String <code>test1234</code> gives: <code>8i4KEe82TQl0Zdlc14fwAg==</code> in both implementations. With string <code>test1234test1234</code> however I get <code>4s5a0edsvwWt/3/enRe0wgJQD/0zL45NRb/r3p6L/Is=</code> with PHP, and <code>4s5a0edsvwWt/3/enRe0wgA0jk78zwWJr1xsosZbYUA=</code> with Java. I'm not sure what's wrong and I'm not knowledgeable enough about Cryptography.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USHassan Ibraheem
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POAES-128 Encryption with Base64 Encoding doesn't act the same in Java and PHP with longer strings
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POAES-128 Encryption with Base64 Encoding doesn't act the same in Java and PHP with longer strings
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWhat happens if you change the PHP to say this? $str .= str_repeat(chr(0), $pad);
      singulars
      1. POAES-128 Encryption with Base64 Encoding doesn't act the same in Java and PHP with longer strings
      1. USSparky
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload