Avoid unnecessary iteration if DerivedLength == iolist_size(Acc) #4
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Without this patch call to pbkdf2(MacFunc, Password, Salt, Iterations) takes twice as much time as it should as an extra block is produced just to be immediately discarded. This is true for any call where DerivedLength == HMAC block size.
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Without this patch call to pbkdf2(MacFunc, Password, Salt, Iterations) takes twice as much time as it should as an extra block is produced just to be immediately discarded.
This is true for any call to pbkdf2 where DerivedLength == HMAC block size.