Owen Kirby <[email protected]> writes:
> It also occurs to me that the my formula for calculating the maximum
> message size from L is completely wrong. L basically specifies the size
> of the counter field (in bytes), so it should really be maxlength = (1
> << (L*8)) - 1.
Is the following correct? Intended for ccm.h:
/* Maximum cleartext message size, as a function of the nonce size N.
The length field is L octets, with L = 15 - N, and then the maximum
size M = 2^{8L} - 1. */
#define CCM_MAX_MSG_SIZE(N) \
((sizeof(size_t) + (N) <= 15) \
? ~(size_t) 0 \
: ((size_t) 1 << (8*(15 - N))) - 1)
Regards,
/Niels
--
Niels Möller. PGP-encrypted email is preferred. Keyid C0B98E26.
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