How to write AES/CBC/PKCS5Padding encryption and decryption with Initialization Vector Parameter for BlackBerry

Question

How to write a BlackBerry program for AES/CBC with Initialization Parameter ecncryption and Decryption and this encryption and decryption should work independent on Programming language Ex= If I encrypt some data using BlackBery I must be able to decrypt the same data using Java Program.

Thanks Deepak

Answer 1

The decryption half of your question is answered here: http://stackoverflow.com/questions/901251/decrypting-data-with-aes-cbc-pkcs5padding-using-blackberry

It should be easy to figure out encryption using the same pattern (use Encryptor instead of Decryptor engines, etc).

Answer 2

Have you read this KB article? http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/800779/How_to_-_Use_Basic_Encryption.html?nodeid=800640&vernum=0

You will also need to use net.rim.device.api.crypto.CBCEncryptorEngine on top of the AESEncryptorEngine (and similar for decryption).

Answer 3

Hi, CBCEngine allows you upto 16 bytes for across platform. so donot use CBC. try to use the default supported cipher engine.

I think ECB will be great if you use.

Thanks Sunil Kumar sahoo

Answer 4

Actually, you write your own code for AES algorithm and CBC mode, it is quite simple, around some hundreds of code lines. And, there should be reference implementation in Java language.