EVP_MAC_ctrl is documented to return 0 or -1 on failure. Numerous places
were not getting this check correct.
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/8584)
The MAC EVP_PKEY implementations are currently implemented for each
MAC. However, with the EVP_MAC API, only one such implementation is
needed.
This implementation takes into account the differences between HMAC
and CMAC implementations, and observes that all other current MAC
implementations seem to follow the HMAC model.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7393)