On Thu, Jan 12, 2017 at 4:04 PM, Herbert Xu <herb...@gondor.apana.org.au> wrote: >> typedef struct { >> u64 v[2]; >> } siphash_key_t; > > If it's just an 128-bit value then we have u128 in crypto/b128ops.h > that could be generalised for this.
Nope, it's actually two 64-bit values. Yes, the user fills it in as one blob to get_random_bytes, but it's used internally by the algorithm as two distinct variables (which conveniently fit into 64-bit registers).