Many of the files available for download from this site have been signed. This page will walk you through what you need to do in order to verify these signatures. This process is entirely optional.
All the files have been signed with the “LEAP archive signing key”. The first step is to import this key into your local keyring. These instructions will use
gpg, a free implementation of OpenPGP that works on Mac, Windows, and Linux.
The easiest way to get the LEAP archive signing key is to just download it from the bitmask.net website and import into your keyring:
wget -O- dl.bitmask.net/apt.key | gpg --import
You should see output that looks like this:
gpg: key 0x1E34A1828E207901: public key "LEAP archive signing key <email@example.com>" imported gpg: Total number processed: 1 gpg: imported: 1 (RSA: 1) gpg: 3 marginal(s) needed, 1 complete(s) needed, classic trust model gpg: depth: 0 valid: 4 signed: 7 trust: 0-, 0q, 0n, 0m, 0f, 4u gpg: depth: 1 valid: 7 signed: 22 trust: 6-, 1q, 0n, 0m, 0f, 0u
Alternately, you can import the LEAP archive signing key by fetching from a keyserver:
gpg --recv-key 1E453B2CE87BEE2F7DFE99661E34A1828E207901
If you want to make the keyserver connection use TLS, you can use the sks-keyserver pool. To use this keyserver pool, you will need to download the sks-keyservers.net CA and save it somewhere on your machine. Additionally, you can verify the certificate’s finger print.
Once you have downloaded the SKS keyserver pool CA, the
recv-key command looks like this:
gpg --keyserver hkps://pool.sks-keyservers.net --keyserver-options 'ca-cert-file=sks-keyservers.netCA.pem' --recv-key 1E453B2CE87BEE2F7DFE99661E34A1828E207901
Assuming you saved the CA certificate to the file
sks-keyservers.netCA.pem. For more information, see this OpenPGP best practices page.
There is absolutely no guarentee that the key just imported with
recv-key is the one you just requested. To confirm, you need to manually check the fingerprint:
gpg --fingerprint 1E453B2CE87BEE2F7DFE99661E34A1828E207901
Which should produce output like so:
pub 4096R/0x1E34A1828E207901 2013-02-06 [expires: 2015-02-07] Key fingerprint = 1E45 3B2C E87B EE2F 7DFE 9966 1E34 A182 8E20 7901 uid [ undef ] LEAP archive signing key <firstname.lastname@example.org>
The signature file for each download has the same name as the file but with
For a listing of the available signature files, see:
Make sure you put the signature file and the download you want to authenticate in the same directory, and that they have the same name (other than the .asc suffix for the signature file).
Now, just run this command:
gpg --verify FILE.asc
Where FILE is the name of the download you want to authenticate.
You should see some output like so:
gpg: Signature made Mon 15 Sep 2014 07:49:07 AM PDT gpg: using RSA key 0x1E34A1828E207901 gpg: Good signature from "LEAP archive signing key <email@example.com>" [unknown] gpg: WARNING: This key is not certified with a trusted signature! gpg: There is no indication that the signature belongs to the owner. Primary key fingerprint: 1E45 3B2C E87B EE2F 7DFE 9966 1E34 A182 8E20 7901
If you have trusted one of the keys that has signed the LEAP key, then you will not see the warning.
If you do not see the text
Good signature from "LEAP archive signing key <firstname.lastname@example.org>" then something is wrong and you should not run the application you downloaded.