| 1 |
On Sun, Sep 14, 2014 at 6:56 PM, hasufell <hasufell@g.o> wrote: |
| 2 |
> According to Robin, it's not about rebasing, it's about signing all |
| 3 |
> commits so that messing with the blob (even if it has the same sha-1) |
| 4 |
> will cause signature verification failure. |
| 5 |
> |
| 6 |
|
| 7 |
The only thing that gets signed is the commit message, and the only |
| 8 |
thing that ties the commit message to the code is the sha1 of the |
| 9 |
top-level tree. If you can attack sha1 either at any tree level or at |
| 10 |
the blob level you can defeat the signature. |
| 11 |
|
| 12 |
That is way better than nothing though - I think it is worth pursuing |
| 13 |
until somebody comes up with a way to upgrade git to more secure |
| 14 |
hashes. Most projects don't gpg sign their trees at all, including |
| 15 |
linux. |
| 16 |
|
| 17 |
-- |
| 18 |
Rich |
Archives