[PATCH v2 0/2] nvme: fixup HKDF-Expand-Label implementation

[Eric Biggers]

On Thu, Aug 21, 2025 at 01:48:14PM -0700, Chris Leech wrote:
> As per RFC 8446 (TLS 1.3) the HKDF-Expand-Label function is using vectors
> for the 'label' and 'context' field, but defines these vectors as a string
> prefixed with the string length (in binary). The implementation in nvme
> is missing the length prefix which was causing interoperability issues
> with spec-conformant implementations.
> 
> This patchset adds a function 'hkdf_expand_label()' to correctly implement
> the HKDF-Expand-Label functionality and modifies the nvme driver to utilize
> this function instead of the open-coded implementation.
> 
> As usual, comments and reviews are welcome.

Well, it's nice that my review comment from last year is finally being
addressed: https://lore.kernel.org/r/20240723014715.GB2319848@google.com

- Eric