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POGetting javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher?
 

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  1. POGetting javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher?
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    <p>Using tomcat, I have two web-applications i.e app1 and app2. I sent url from app1 in encrypted form (using below code) to app2 . Then at app2 I decrypted this encrypted url. But am getting below exception at line 50 of <code>decryp</code> method. </p> <pre><code>"Getting javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher" </code></pre> <p>Though for debugging when I try to decrypt(using same code) the encrypted url at app1, it works fine. But not able to figure out what causing this exception at app2?</p> <p><strong>Here is the code</strong></p> <pre><code> import java.security.Key; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; public class AESEncryptionDecryptionTest { private static final String ALGORITHM = "AES"; private static final String myEncryptionKey = "ThisIsFoundation"; private static final String UNICODE_FORMAT = "UTF8"; public static String encrypt(String valueToEnc) throws Exception { Key key = generateKey(); Cipher c = Cipher.getInstance(ALGORITHM); c.init(Cipher.ENCRYPT_MODE, key); byte[] encValue = c.doFinal(valueToEnc.getBytes()); String encryptedValue = new BASE64Encoder().encode(encValue); return encryptedValue; } public static String decrypt(String encryptedValue) throws Exception { Key key = generateKey(); Cipher c = Cipher.getInstance(ALGORITHM); c.init(Cipher.DECRYPT_MODE, key); byte[] decordedValue = new BASE64Decoder().decodeBuffer(encryptedValue); byte[] decValue = c.doFinal(decordedValue);//////////LINE 50 String decryptedValue = new String(decValue); return decryptedValue; } private static Key generateKey() throws Exception { byte[] keyAsBytes; keyAsBytes = myEncryptionKey.getBytes(UNICODE_FORMAT); Key key = new SecretKeySpec(keyAsBytes, ALGORITHM); return key; } public static void main(String[] args) throws Exception { String value = "password1"; String valueEnc = AESEncryptionDecryptionTest.encrypt(value); String valueDec = AESEncryptionDecryptionTest.decrypt(valueEnc); System.out.println("Plain Text : " + value); System.out.println("Encrypted : " + valueEnc); System.out.println("Decrypted : " + valueDec); } } </code></pre>
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