Generated EC key has wrong length?

[Roger Lipscombe]

On Thu, 20 May 2021 at 16:26, Roger Lipscombe <roger@REDACTED> wrote:
> The following snippet...
>
> [] = lists:foldl(fun(_, Acc) ->
>         Key = public_key:generate_key({namedCurve, secp256r1}),
>         {'ECPrivateKey', 1, PrivateKey, _Parameters, _PublicKey} = Key,
>         case byte_size(PrivateKey) of
>             32 -> Acc;
>             _ -> [Key | Acc]
>         end
>     end, [], lists:seq(1, 10_000)).
>
> ...fails.
>
> secp256r1 private keys should be 32-bytes long, afaict. Should OTP be
> zero-prefixing the key when converting to binary?

OTP-24.0; should've mentioned that.