The routine AES_CCM_inc() keeps propagating the carry from an overflow,
which means our implementation fails for large blocks of data.
The following code fragment should address that bug.
/*! @brief
Increment the CCM CTR, which is variable length, big endian
@param counter the counter to increment
@param q the number of bytes in the counter
*/
static void AES_CCM_inc(unsigned char *counter,unsigned q) {
int i;
for(i = 15; q > 0 ; i--,q--) {
counter[i]++;
if(0 != counter[i] ) break;
}
}
I'll post a full update to the request tracker when things ease up in my
day job.
Peter
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