Difference between revisions of "GPG Signatures"

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(Created page with "Funtoo Linux stage tarballs are signed using GPG by the build server they are built on. The following keys are used to create detached binary signatures ending in {{c|.gpg}} o...")
 
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Funtoo Linux stage tarballs are signed using GPG by the build server they are built on. The following keys are used to create detached binary signatures ending in {{c|.gpg}} of each stage tarball:
{{Subpages|Metro Plaintext Keys}}
 
The Funtoo Linux master GPG signing key is the {{c|drobbins@funtoo.org}} key (the "BDFL key"), which has the following signature:


{{TableStart}}
{{TableStart}}
<tr><th>GPG key name/email</th><th>GPG comment</th><th>GPG Key ID</th><th>Fingerprint</th><th>GPG Key Type</th></tr>
<tr><th>GPG key name/email</th><th>GPG comment</th><th>Fingerprint</th></tr>
<tr><td>Daniel Robbins {{c|drobbins@funtoo.org}}</td><td>{{c|metro:node}}</td><td>{{c|11FD00FD}}</td><td>{{c|70AC BB6B FEE7 BC57 2A89 41D1 9266 C4FA 11FD 00FD}}</td><td>4096-bit RSA (no expiry)</td></tr>
<tr><td>Daniel Robbins {{c|drobbins@funtoo.org}}</td><td>{{c|BDFL}}</td><td>{{c|D3B9 48F8 2EE8 B402 0A04 1078 9A65 8306 E986 E8EE}}</td></tr>
<tr><td>Daniel Robbins {{c|drobbins@funtoo.org}}</td><td>{{c|metro:excavator}}</td><td>{{c|683A2F8A}}</td><td>{{c|E8C5 7481 5DC1 74AF 5A9E  8385 3AA5 CA5E 683A 2F8A}}</td><td>4096-bit RSA (no expiry)</td></tr>
{{TableEnd}}
{{TableEnd}}


In turn, these public keys are signed by the Funtoo Linux master signing key:
{{Important|For right now, it's best to not download the {{c|stage3-latest.tar.xz}} file if you are doing GPG verification, but instead download the latest files from the corresponding date timestamp subdirectory. The {{c|.gpg}} file exists in the timestamp directory only.}}
 
To verify the integrity of stage3 tarballs using GPG, head to the timestamp directory ({{c|2021-11-23/}}, for example) on build.funtoo.org to download your preferred stage3 tarball and the matching file with the additional {{c|.gpg}} extension in the same directory. Next, we will receive the public master key from a public keyserver (specifying the ''last 8 digits of the BDFL fingerprint'',) and assign ultimate trust to it:
 
{{console|body=
$ ##i##gpg --keyserver pgp.mit.edu --recv-key E986E8EE
$ ##i##gpg --edit-key E986E8EE
gpg> ##i##trust
Your decision? ##i##5
Do you really want to set this key to ultimate trust? (y/N) ##i##y
gpg> ##i##quit
}}
Each build server key has been signed by the BDFL key, so by trusting the BDFL key ''ultimately'', you will automatically ''fully'' trust the build server key.
 
Next, head to [[GPG Signatures/Metro Plaintext Keys]] and copy and paste the public key and associated signatures for the metro build server into a file called {{c|node.txt}}. Then, import this key into GPG:
 
{{console|body=
$ ##i##gpg --import node.txt
}}
 
Then, you can use the {{c|gpg --verify}} command to verify the stage3's GPG signature. You should see output similar to this. The BDFL trusts this key, and if your stage file is not corrupted, you will see a message of a "Good signature" and an exit code of zero:


{{TableStart}}
{{console|body=
<tr><th>GPG key name/email</th><th>GPG comment</th><th>GPG Key ID</th><th>Fingerprint</th><th>GPG Key Type</th></tr>
$ ##i##gpg --verify stage3-amd64-zen2-1.4-release-std-2021-11-23.tar.xz.gpg stage3-amd64-zen2-1.4-release-std-2021-11-23.tar.xz
<tr><td>Daniel Robbins {{c|drobbins@funtoo.org}}</td><td>{{c|BDFL}}</td><td>{{c|E986E8EE}}</td><td>{{c|D3B9 48F8 2EE8 B402 0A04  1078 9A65 8306 E986 E8EE}}</td><td>4096-bit RSA (no expiry)</td></tr>
gpg: Signature made Fri 03 Dec 2021 09:27:55 AM MST
{{TableEnd}}
gpg:                using RSA key 30737D12308C9D0C882FC34B57CB0A121BAECB2E
gpg: Good signature from "Daniel Robbins (metro:node) <drobbins@funtoo.org>" [full]
$ ##i##echo $?
0
}}
 
{{Note|For more details on the benefits of GPG, read https://gnupg.org/gph/en/manual.html }}
 
[[Category:Official Documentation]]

Revision as of 18:55, December 3, 2021

Subpages:
Metro Plaintext Keys

The Funtoo Linux master GPG signing key is the drobbins@funtoo.org key (the "BDFL key"), which has the following signature:

GPG key name/emailGPG commentFingerprint
Daniel Robbins drobbins@funtoo.orgBDFLD3B9 48F8 2EE8 B402 0A04 1078 9A65 8306 E986 E8EE
   Important

For right now, it's best to not download the stage3-latest.tar.xz file if you are doing GPG verification, but instead download the latest files from the corresponding date timestamp subdirectory. The .gpg file exists in the timestamp directory only.

To verify the integrity of stage3 tarballs using GPG, head to the timestamp directory (2021-11-23/, for example) on build.funtoo.org to download your preferred stage3 tarball and the matching file with the additional .gpg extension in the same directory. Next, we will receive the public master key from a public keyserver (specifying the last 8 digits of the BDFL fingerprint,) and assign ultimate trust to it: 

user $ gpg --keyserver pgp.mit.edu --recv-key E986E8EE
user $ gpg --edit-key E986E8EE
gpg> trust
Your decision? 5
Do you really want to set this key to ultimate trust? (y/N) y
gpg> quit

Each build server key has been signed by the BDFL key, so by trusting the BDFL key ultimately, you will automatically fully trust the build server key.

Next, head to GPG Signatures/Metro Plaintext Keys and copy and paste the public key and associated signatures for the metro build server into a file called node.txt. Then, import this key into GPG: 

user $ gpg --import node.txt

Then, you can use the gpg --verify command to verify the stage3's GPG signature. You should see output similar to this. The BDFL trusts this key, and if your stage file is not corrupted, you will see a message of a "Good signature" and an exit code of zero: 

user $ gpg --verify stage3-amd64-zen2-1.4-release-std-2021-11-23.tar.xz.gpg stage3-amd64-zen2-1.4-release-std-2021-11-23.tar.xz
gpg: Signature made Fri 03 Dec 2021 09:27:55 AM MST
gpg:                using RSA key 30737D12308C9D0C882FC34B57CB0A121BAECB2E
gpg: Good signature from "Daniel Robbins (metro:node) <drobbins@funtoo.org>" [full]
user $ echo $?
0
   Note

For more details on the benefits of GPG, read https://gnupg.org/gph/en/manual.html

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