linux/crypto/asymmetric_keys
Dimitri John Ledkov c1d760a471 crypto: mscode_parser - remove sha224 authenticode support
It is possible to stand up own certificates and sign PE-COFF binaries
using SHA-224. However it never became popular or needed since it has
similar costs as SHA-256. Windows Authenticode infrastructure never
had support for SHA-224, and all secureboot keys used fro linux
vmlinuz have always been using at least SHA-256.

Given the point of mscode_parser is to support interoperatiblity with
typical de-facto hashes, remove support for SHA-224 to avoid
posibility of creating interoperatibility issues with rhboot/shim,
grub, and non-linux systems trying to sign or verify vmlinux.

SHA-224 itself is not removed from the kernel, as it is truncated
SHA-256. If requested I can write patches to remove SHA-224 support
across all of the drivers.

Signed-off-by: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-10-20 13:39:26 +08:00
..
2022-06-21 16:05:12 +01:00
2022-06-21 16:05:12 +01:00
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