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Google Earth pgp key problem. Outdated keys in .deb installer? 0 Recommended Answers 0 Replies 0 Upvotes
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tl;dr: I think the PGP keys within the Google Earth .deb file need updating. Updating keys via `wget` / `apt-key add` command at https://www.google.com/linuxrepositories/ fixes problem.

Today (2020-01-30), I noticed that Google Earth is unable to update on my Debian 10 machine even after running the latest installer from https://www.google.com/earth/versions/#download-pro .

$ sudo apt-get update
Ign:1 http://dl.google.com/linux/earth/deb stable InRelease
Hit:2 http://deb.debian.org/debian buster InRelease
Hit:3 http://deb.debian.org/debian buster-updates InRelease
Get:4 http://dl.google.com/linux/earth/deb stable Release [933 B]
Get:5 http://dl.google.com/linux/earth/deb stable Release.gpg [819 B]
Hit:7 http://deb.debian.org/debian-security buster/updates InRelease
Err:5 http://dl.google.com/linux/earth/deb stable Release.gpg
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 78BD65473CB3BD13
Fetched 819 B in 1s (1,123 B/s)
Reading package lists...

I see that rsa4096/0x78BD65473CB3BD13 is a signing subkey of primary key rsa4096/0x7721F63BD38B4796 which can be obtained by following instructions at https://www.google.com/linuxrepositories/ . However, I cannot find this signing subkey within the http://dl.google.com/dl/earth/client/current/google-earth-pro-stable_current_amd64.deb  installer (SHA256 hash: 57b6c970609dc2960e9255b08a7ddf3af2581cb7c06ff92d16820269d0b2530d ).

  • In the installer I see the primary key rsa4096/0x7721F63BD38B4796 is present within these three files but all lack the signing subkey 0x78BD65473CB3BD13
    • google-earth-pro-stable_current_amd64/control/postinst
    • google-earth-pro-stable_current_amd64/control/postrm
    • google-earth-pro-stable_current_amd64/data/etc/cron.daily/google-earth-pro

PGP keys I found in the `.deb` installer:
pub   dsa1024/0xA040830F7FAC5991 2007-03-08 [SC]
      Key fingerprint = 4CCA 1EAF 950C EE4A B839  76DC A040 830F 7FAC 5991
uid                   [ unknown] Google, Inc. Linux Package Signing Key <linux-packages-keymaster@google.com>
sub   elg2048/0x4F30B6B4C07CB649 2007-03-08 [E]

pub   rsa4096/0x7721F63BD38B4796 2016-04-12 [SC]
      Key fingerprint = EB4C 1BFD 4F04 2F6D DDCC  EC91 7721 F63B D38B 4796
uid                   [ unknown] Google Inc. (Linux Packages Signing Authority) <linux-packages-keymaster@google.com>

PGP keys from https://www.google.com/linuxrepositories/ (specifically
https://dl.google.com/linux/linux_signing_key.pub ):

pub   dsa1024/0xA040830F7FAC5991 2007-03-08 [SC]
      Key fingerprint = 4CCA 1EAF 950C EE4A B839  76DC A040 830F 7FAC 5991
uid                   [ unknown] Google, Inc. Linux Package Signing Key <linux-packages-keymaster@google.com>
sub   elg2048/0x4F30B6B4C07CB649 2007-03-08 [E]

pub   rsa4096/0x7721F63BD38B4796 2016-04-12 [SC]
      Key fingerprint = EB4C 1BFD 4F04 2F6D DDCC  EC91 7721 F63B D38B 4796
uid                   [ unknown] Google Inc. (Linux Packages Signing Authority) <linux-packages-keymaster@google.com>
sub   rsa4096/0x78BD65473CB3BD13 2019-07-22 [S] [expires: 2022-07-21]

Running the `wget` / `apt-key add` command posted at https://www.google.com/linuxrepositories/ added the signing subkey rsa4096/0x78BD65473CB3BD13 to the primary key rsa4096/0x7721F63BD38B4796 stored within my `/etc/apt/trusted.gpg` file, fixing the `$ sudo apt-get update` error:

$ sudo apt-get update
Hit:1 http://deb.debian.org/debian buster InRelease
Ign:2 http://dl.google.com/linux/earth/deb stable InRelease                                      
Hit:3 http://deb.debian.org/debian buster-updates InRelease                                      
Hit:4 http://dl.google.com/linux/earth/deb stable Release                                        
Hit:6 http://deb.debian.org/debian-security buster/updates InRelease
Reading package lists... Done

Sidenote: there are a few outdated links to http://www.google.com/linuxrepositories/aboutkey.html within bash scripts in the `.deb` installer.

o7
baltakatei
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