Verifying downloaded packages

[Paul Howarth]

On Fri, 2005-07-01 at 14:16 -0500, Michael Yep wrote:
> Hello
> 
> I installed a rpm on my system that I got off the web. 
> How can I know if it is a trusted package ?
> 
> [winston at localhost ~]$ rpm  -vvK compat-libstdc++-296-2.96-132.fc4.i386.rpm
> D: Expected size:       178657 = lead(96)+sigs(344)+pad(0)+data(178217)
> D:   Actual size:       178657
> D: opening  db index       /var/lib/rpm/Packages rdonly mode=0x0
> D: locked   db index       /var/lib/rpm/Packages
> D: opening  db index       /var/lib/rpm/Pubkeys rdonly mode=0x0
> D:  read h#     279 Header sanity check: OK
> D: ========== DSA pubkey id b44269d0 4f2a6fd2 (h#279)
> compat-libstdc++-296-2.96-132.fc4.i386.rpm:
>     Header V3 DSA signature: OK, key ID 4f2a6fd2
>     Header SHA1 digest: OK (dcd6900d5f8126232eee364b4662fe7e38155377)
>     MD5 digest: OK (b0580787dce3f1a1bbf9774340d20cf8)
>     V3 DSA signature: OK, key ID 4f2a6fd2
> D: closed   db index       /var/lib/rpm/Pubkeys
> D: closed   db index       /var/lib/rpm/Packages
> D: May free Score board((nil))
> [winston at localhost ~]$
> 
> I forget where I even downloaded it from, but I didn't import anything 
> to my keyring.
> What keys come with FC4?

Look in /etc/pki/rpm-gpg

> Which ones are trusted?

Anything that's in there has presumably been put there as a result of a
package installation (you could use "rpm -qf /etc/pki/rpm-gpg/filename"
to see which package a key belongs to) and it should be reasonable for
you to trust any key provided by a package you've already installed, if
you're careful as you appear to be about these things.

> I understand the the package has the correct checksum, but can I trust 
> the signer ?

The key in this case is the RPM-GPG-KEY-fedora one. Decide for
yourself :-)

Paul.
-- 
Paul Howarth <paul at city-fan.org>