Databases
StackOverflow2013
Postsdbo
POException in AES decryption algorithm in java
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POException in AES decryption algorithm in java
    primarykey
    data
    text
    <p>I got an exception in the following code for AES algorithm in java.</p> <p>Code decryptes an encrypted string and returns the original string. </p> <p>Plz help me to fix this.</p> <p>Code:</p> <pre><code>public class AES { public byte[] encrypted; public byte[] original; public String originalString; public static String asHex (byte buf[]) { StringBuffer strbuf = new StringBuffer(buf.length * 2); int i; for (i = 0; i &lt; buf.length; i++) { if (((int) buf[i] &amp; 0xff) &lt; 0x10) strbuf.append("0"); strbuf.append(Long.toString((int) buf[i] &amp; 0xff, 16)); } return strbuf.toString(); } public String AESencryptalgo(byte[] text) { String newtext=""; // Get the KeyGenerator try { KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(128); // 192 and 256 bits may not be available // Generate the secret key specs. SecretKey skey = kgen.generateKey(); byte[] raw = skey.getEncoded(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); // Instantiate the cipher Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec); encrypted = cipher.doFinal(text); System.out.println("encrypted string: " + asHex(encrypted)); cipher.init(Cipher.DECRYPT_MODE, skeySpec); original = cipher.doFinal(encrypted); originalString = new String(original); System.out.println("Original string: " + originalString + " " + asHex(original)); } catch(Exception e) { } finally { newtext=new String(encrypted); System.out.println("ENCRYPTED "+newtext); //AESdecryptalgo(newtext.getBytes()); return newtext; } } public String AESdecryptalgo(byte[] text) { // Get the KeyGenerator try { KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(128); // 192 and 256 bits may not be available // Generate the secret key specs. SecretKey skey = kgen.generateKey(); byte[] raw = skey.getEncoded(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); // Instantiate the cipher Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.DECRYPT_MODE, skeySpec); original = cipher.doFinal(text); //Exception occurs here originalString = new String(original); System.out.println("Original string: " + originalString + " " + asHex(original)); } catch(Exception e) { System.out.println("exception"); } finally { System.out.println("DECRYPTED "+originalString); return originalString; } } public static void main(String[] args) { AES a=new AES(); a.AESencryptalgo("hello".getBytes()); System.out.println(); }} ` </code></pre> <p>exception:</p> <pre><code>javax.crypto.BadPaddingException: Given final block not properly padded at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..) at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..) at com.sun.crypto.provider.AESCipher.engineDoFinal(DashoA13*..) at javax.crypto.Cipher.doFinal(DashoA13*..) </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJames K Polk
    1. USsparkle
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    3. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POException in AES decryption algorithm in java
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POException in AES decryption algorithm in java
      1. USXavier Combelle
      1. VTFavorite
    3. VO
      singulars
      1. POException in AES decryption algorithm in java
      1. This table or related slice is empty.
      1. VTDownMod
    1. COyou should reformat your code
      singulars
      1. POException in AES decryption algorithm in java
      1. USXavier Combelle
    2. CO@ Xavier Combelle I have reformatted
      singulars
      1. POException in AES decryption algorithm in java
      1. USsparkle
    3. CO@user: What *is* the exception? At the very least replace your println with `e.printStackTrace()` and report back.
      singulars
      1. POException in AES decryption algorithm in java
      1. USYann Ramin
 

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