On 02/10/2016 11:12 AM, David Howells wrote: > Juerg Haefliger <juerg.haefli...@hpe.com> wrote: > >> This patch adds support for signing a kernel module with a raw >> detached PKCS#7 signature/message. >> >> The signature is not converted and is simply appended to the module so >> it needs to be in the right format. Using openssl, a valid signature can >> be generated like this: >> $ openssl smime -sign -nocerts -noattr -binary -in <module> -inkey \ >> <key> -signer <x509> -outform der -out <raw sig> >> >> The resulting raw signature from the above command is (more or less) >> identical to the raw signature that sign-file itself can produce like >> this: >> $ scripts/sign-file -d <hash algo> <key> <x509> <module> > > What's the usage case for this? Can it be done instead with openssl PKCS#11?
Our internal signing service doesn't support PKCS#11. I have to submit the blobs and get detached PKCS#7 messages back. I don't claim I fully understand all the different signing mechanisms but everything worked just fine until support for signing with a detached signature was removed. IMO that's a regression, which I'm trying to fix with this patch. ...Juerg > David >
