Also use a slightly more conservative pattern. Instead of aligning the
pointer as a uintptr_t and casting back, compute the offset and advance
in pointer space. C guarantees that casting from pointer to uintptr_t
and back gives the same pointer, but general integer-to-pointer
conversions are generally implementation-defined. GCC does define it in
the useful way, but this makes fewer dependencies.
Change-Id: I70c7af735e892fe7a8333b78b39d7b1f3f1cdbef
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/48405
Reviewed-by: Adam Langley <alangley@gmail.com>
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>
David Benjamin
Brian Smith
Adam Langley