Hi, Once more I'm demonstrating my utter lack of knowledge in all matters related to cryptography. Please forgive these trivial questions.
I'm trying to use gcry_cipher_encrypt(). I've set the cipher mode to GCRY_CIPHER_MODE_CFB(*) and the algorithm is GCRY_CIPHER_AES256. My problem is that the size of the plaintext data is unknown to me as I have to use gcry_cipher_encrypt() for arbitrary plaintext data. The manual for libgcrypt says that the size of the input data has to be a multiple of the block size of the cipher algorithm. So what I'm really asking about is whether there is a standard way of padding the input data to achieve the required size? How do I remove/recognize the padding when decrypting? Thanks a lot in advance, jules (*) Is that mode a wise choice? _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
