ChaCha20 Rekey Frequency

[Thorsten Glaser]

On Thu, 30 Mar 2023, Damien Miller wrote:

>> >+	return (uint64_t)1 << (c->block_size * 2);
>> 
>> … this get an upper bound? This is UB for 256-bit blocksizes
>> at least…
>
>block sizes in struct sshcipher are in bytes, not bits

Yes, exactly.

256 bit = 32 bytes; 32*2 = 64; (uint64_t)1 << 64 is UB.

bye,
//mirabilos
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