With the recent patches added to kernel crypto for improving AES support, adding aesni etc, it seems like it is time to add AES CMAC to the cifs kernel module (for the popular SMB3 signing and per-share encryption) but needed for an implementation for SP800-138 in kernel crypto codebase. Was specifically interested using the way defined in 3.1.4.2 of MS-SMB2 document, in particular KDF in Counter mode (section 5.1 of NIST SP 800-108) or a way to specify a mode PRF as HMAC-SHA256 (or a way to specify a PRF) cifs client would use this algorithm for SMB3.0 MAC generation (network packet signing on network file system mounts to newer generation NAS, and Windows 2012) and also for per-share encryption (which is also available on the most recent generation of NAS via SMB3). Apparently with current Intel processors having hardware for this kind of encryption offload - full packet encryption is faster than packet signing used to be (with the older standard algorithms) and just doing packet signing is really fast. Are their APIs in crypto kernel code to use for this purpose? Regards, Shirish -- 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
