Re: [key4.db] IV size for aes256-CBC

Hi Louis,

The dev-tech-crypto mailing list I'm redirecting this to should be able to
get you an answer.

Thanks,
MattN


On Fri, Mar 27, 2020 at 8:51 AM Louis Abraham <[email protected]>
wrote:

> Hi,
>
> I'm the main developer of https://github.com/louisabraham/ffpass
> We are currently trying to accommodate the (not so) recent cryptographic
> changes in key4.db.
>
> If I understand correctly, key4.db contains a table metadata. The value
> item2 defines a cryptographic algorithm in the DER format.
>
> In the latest version of Firefox, this algorithm is PBES2, using
> aes256-CBC as the encryption algorithm.
>
> I'm facing a little problem when trying to execute aes256-CBC because the
> IV size is only 14 bytes (56 bits) instead of the 64 bits defined in the
> spec.
>
> Could you please help me to understand?
>
> Best,
> Louis
>
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