Hi, I'm using the fips approved OpenSSL to do AES encryption in ISDN, therefore, I need to use the fips_128_AES_OFB function. If I understand correctly this function works on a 128bit (16 byte) block, so if I want to use it on larger blocks I need to call it in a loop. This is different from the AES_CBC function which works on every block size (as long as it is aligned to 128bit). Is there another OFB function which knows to handle different block sizes or loop is the only way.
Thanks, Avisar
