On 03/23/15 09:06, Devin Teske wrote:
On Mar 22, 2015, at 10:47 PM, Sergey V. Dyatko <sergey.dya...@gmail.com> wrote:

Hi Devin,

Recently I'm trying to install FreeBSD CURRENT from bootonly image
( FreeBSD-11.0-CURRENT-amd64-20150302-r279514-bootonly.iso)
on IBM HS22 blade via bladecenter's kvm but I faced with problem on checksum
stage, bootonly doesn't contain base, kernel,etc distributions but it contain
manifest file.
On mirrors we have  pub/FreeBSD/snapshots/${ARCH}/11.0-CURRENT/*txz and
MANIFEST, sha256 sums from _local_ manifest doesn't match sha256 sums for
fetched files. I suppose it will be fine with RELEASE bootonly iso but not with
stable/current.
there is 2 ways how we can handle it:
1) download remote MANIFEST if spotted checksum mismatch and trying to use it
2) allow user to continue installation with 'broken' distributions

I had to first put 10.1 then update it to HEAD :(

What do you think ?
When I get some time I’ll have a look and see what I can do.
—
Cheers,
Devin



Using the local manifest is a security feature -- there is otherwise zero protection against a man-in-the-middle attack. Ideally, you'd use the ISO that matches the posted files. There are three options here: 1. Add a dialog that lets you move ahead in the event of checksum failure, which makes me very nervous.
2. Use the boot1 disk.
2a. For release engineering: if the posted tarballs change too fast, the bootonly disk isn't actually useful for -CURRENT and should probably be removed from the FTP server. 3. You could reroll the ISO (just untar and run makefs again), commenting out line 180 of /usr/libexec/bsdinstall/scripts/auto.
-Nathan
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