From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Date: Thu, 04 Nov 2010 12:36:19 -0500 > crypto: algif_hash - User-space interface for hash operations > > This patch adds the af_alg plugin for hash, corresponding to > the ahash kernel operation type. > > Keys can optionally be set through the setsockopt interface. > > Each sendmsg call will finalise the hash unless sent with a MSG_MORE > flag. > > Partial hash states can be cloned using accept(2). > > The interface is completely synchronous, all operations will > complete prior to the system call returning. > > Both sendmsg(2) and splice(2) support reading the user-space > data directly without copying (except that the Crypto API itself > may copy the data if alignment is off). > > For now only the splice(2) interface supports performing digest > instead of init/update/final. In future the sendmsg(2) interface > will also be modified to use digest/finup where possible so that > hardware that cannot return a partial hash state can still benefit > from this interface. > > Thakns to Miloslav Trmac for reviewing this and contributing > fixes and improvements. > > Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
