This CL adds the poly1305.MAC type which implements a
subset of the hash.Hash interface. With MAC it is possible
to compute an authentication tag of data without copying
it into a single byte slice.
This commit modifies the reference/generic and the
AMD64 assembler but not the ARM/s390x implementation
to support an io.Writer interface.
Updates golang/go#25219
Change-Id: I7ee5a9eadd43387cf3cd887d734c625575eee47d
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/111335
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
