I had used Cryptography Symbian library.
And I had tried to decrypt .dcf file (protected media content) using AES 128 CBC, but I get stuck with key & IV (initial vector) format or encoding in that API.
first, I try with hex format (32 character), but my program get kernel panic (exit).
And then I try with ASCII format (16 character) and decryption is success. But the decypted file can not be played in native music player in nokia device.
Any body can give me clue to solve this problem.