aes

I've been having trouble trying to communicate between PHP and my iOS application using AES encryption. So far, I've considered two methods of implementation. The first was to use OpenSSL. On the iOS side, I implemented in a way to mimic the code shown here: http://saju.net.in/code/misc/openssl_aes.c.txt . On the PHP side, I took the generated key and IV (from the iPhone) and used it as input to the PHP openssl encrypt. The results differed in terms of the output... I have also considered: http://iphonedevelopment.blogspot.com/2009/02/strong-encryption-for-cocoa-cocoa-touch.html but this SO

So I have been browsing the internet, and came across the MySQL built-in function AES_ENCRYPT. It doesn't seem too hard to use, but some sources tell me to store the encrypted data as a VARCHAR, and some say to store it as a BLOB. What should I store the encrypted data as? Many encryption and compression functions return strings for which the result might contain arbitrary byte values. If you want to store these results, use a column with a VARBINARY or BLOB binary string data type. This will avoid potential problems with trailing space removal or character set conversion that would change

I'm interfacing to a legacy Java application (the app cannot be changed) which is encrypting data using AES. Here is how the original Java code is instantiating the AES cipher: SecretKeySpec skeySpec = new SecretKeySpec(key, "AES"); cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec ); I'm a C/C++ developer, not Java, but from what I can tell this legacy Java code is not specifying the mode, nor the initialization vector. Anyone happen to know what Java would be using by default since it isn't specified? We need the new C/C++ app to decrypt the Java-encrypted data.

This is the code for encrypting and decrypting a string in java using AES algorithm. Its throwing illegalblocksize exception while decrypting. I know it is occuring because length of input string to the decryption method isn't matching with the padding. I don't have an idea of how to solve this. I am a new bie to the encryption decryption. Plz help me.... StackTrace: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..) at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..) at com.sun.crypto

I can see they are different than the bytes I created the string with! I have used "AES/CBC/PKCS5Padding" to get the string. public static void main(String[] args) { try { int randomNumber = CNStationQueueUtil.randInt(0, 99999); String key = "AES_KEY_TAKENUMB"; byte[] bytes = EncryptHelper.encrypt(key, String.format("%%%d%%%d", 1001, randomNumber)); String str = new String(bytes, "UTF8"); System.out.println("str = " + str); System.out.println(); byte[] utf8Bytes = str.getBytes("UTF8"); printBytes(utf8Bytes, "utf8Bytes"); } catch (Exception e) { e.printStackTrace(); } } public class

The following code perfectly implements AES-128 encryption/decryption. public static void main(String[] args) throws Exception { String input = JOptionPane.showInputDialog(null, "Enter your String"); System.out.println("Plaintext: " + input + "\n"); // Generate a key KeyGenerator keygen = KeyGenerator.getInstance("AES"); keygen.init(128); byte[] key = keygen.generateKey().getEncoded(); SecretKeySpec skeySpec = new SecretKeySpec(key, "AES"); // Generate IV randomly SecureRandom random = new SecureRandom(); byte[] iv = new byte[16]; random.nextBytes(iv); IvParameterSpec ivspec = new