>> HKDF-Expand-Label(Secret, Label, *Value*, Length) =
>> HKDF-Expand(Secret, HkdfLabel, Length)
>>
>> struct {
>> uint16 length = *Value.length*;
>> opaque label<7..255> = "tls13 " + Label;
>> opaque hash_value<0..255> = *Value*;
>> } HkdfLabel;
>
> Length is the size of the output, so you don't want to assign
> Value.length to that field in the struct.
Yes. I would remove the "length" field, too.
> Also, you forgot to rename hash_value in the struct.
You are right.
--Kazu
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