On Thu, Jan 25, 2018 at 11:55:58PM +0200, Alon Bar-Lev wrote:
> I did not looked into the detailed implementation, however, please
> make sure integrity check handles the same cases we have applied to
> emerge-webrsync in the past, including:
Gemato is the implementation of GLEP74/MetaManifest, which DOES
explicitly address both of these concerns.

> 1. Fast forward only in time, this is required to avoid hacker to
> redirect into older portage to install vulnerabilities that were
> approved at that time.
Replay attacks per #1 are addressed via TIMESTAMP field in MetaManifest.

> 2. Content integrity, especially removal, as far as I understand, the
> mechanism will not enable to detect authorized removal of content.
I think you meant 'unauthorized' rather than 'authorized' here.
It will detect files that are expected to exist but are missing.

Robin Hugh Johnson
Gentoo Linux: Dev, Infra Lead, Foundation Treasurer
E-Mail   : robb...@gentoo.org
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