RSA decryption on mobile

[Anuradha Karunamuni]

Hi all,

I am developing a J2ME application which uses Bouncy Castle crypto API to handle the security. I use RSA public and private keys to encrypt and decrypt the strings which are SMS messages.

The encryption is done using the public key and it executes successfully. But when I try to decrypt the encrypted text using the private key it gives the following Exception;

InvalidCipherTextException: unknown block type Exception

If any of you aware of a solution to overcome this, please let me know.

Thanks in advance.

[Anuradha Karunamuni]

I manged to fix the problem.

It was some encoding issue. I encoded the byte[] before encryption using Base64 and decoded the byte[] to be decrypted using Base64. Then the problem was solved. (You can use either Base64 or Hex for encoding and decoding. Both work fine.)