On Thu, May 30, 2019 at 12:48:43AM +0200, Richard Weinberger wrote: > Some crypto accelerators allow working with secure or hidden keys. > This keys are not exposed to Linux nor main memory. To use them > for a crypto operation they are referenced with a device specific id. > > This patch adds a new flag, CRYPTO_TFM_REQ_REF_KEY. > If this flag is set, crypto drivers should tread the key as > specified via setkey as reference and not as regular key. > Since we reuse the key data structure such a reference is limited > by the key size of the chiper and is chip specific. > > TODO: If the cipher implementation or the driver does not > support reference keys, we need a way to detect this an fail > upon setkey. > How should the driver indicate that it supports this feature? > > Signed-off-by: Richard Weinberger <richard@xxxxxx> We already have existing drivers doing this. Please have a look at how they're doing it and use the same paradigm. You can grep for paes under drivers/crypto. Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
