Clarify that there are no truncation issues on targets where the range
of |unsigned| is smaller than the range of |size_t|.
Ensure that |poly1305_state| is (still) large enough. This is a good
idea independently of this change, but is especially important because
switching the fields to |size_t| might have enlarged the structures.
Change-Id: I16e408229c28fcba6c3592603ddb9431cf1f142d
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/44244
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
Brian Smith
Adam Langley