On 11.01.2022 19:03, Roberto Sassu wrote:
Support for PGP keys and signatures was proposed by David long time ago, before the decision of using PKCS#7 for kernel modules signatures verification was made. After that, there has been not enough interest to support PGP too. Lately, when discussing a proposal of introducing fsverity signatures in Fedora [1], developers expressed their preference on not having a separate key for signing, which would complicate the management of the distribution. They would be more in favor of using the same PGP key, currently used for signing RPM headers, also for file-based signatures (not only fsverity, but also IMA ones).
Aren't PGP keys simply RSA / ECC / EdDSA keys with additional metadata? Can't they be unwrapped from their (complex) PGP format in userspace and loaded raw into the kernel, in a similar way as they are sometimes used for SSH authentication? This will save us from having to add complex parsers (a well-known source of bugs) into the kernel - I guess there aren't any plans to add an in-kernel PGP Web of Trust implementation. Thanks, Maciej
