Re: GCM counter inc

2012-06-29 Thread Ronen Shitrit
Can someone verify if it is a bug? Thanks On Wed, Jun 20, 2012 at 11:44 AM, Ronen Shitrit rshit...@gmail.com wrote: Hi According to the GCM NIST publication, the counter increment should be module 32 bit. Looking into the crypto code, I can see that when using gcm(aes) the gcm will use the

GCM counter inc

2012-06-20 Thread Ronen Shitrit
Hi According to the GCM NIST publication, the counter increment should be module 32 bit. Looking into the crypto code, I can see that when using gcm(aes) the gcm will use the ctr over aes, ctr.c is using the crypto_inc with size of blocksize, which is 16 for AES. in case crypto_inc will overflow